The document discusses Alzheimer's disease (AD), including its causes, symptoms, pathogenesis, and treatment approaches. It begins by defining AD as a progressive brain disease that destroys memory and cognitive abilities. Risk factors include age, family history, head trauma, and genetic factors. Symptoms start with mild memory loss and eventually lead to severe cognitive decline and inability for self-care. The pathogenesis involves beta-amyloid plaques and neurofibrillary tangles resulting from tau protein abnormalities. Current treatments target symptoms but not the underlying disease process, and focus on acetylcholinesterase inhibitors, memantine, vaccines, and antioxidants. Research continues on disease-modifying therapies such as inhibiting amyloid formation or tau phosphorylation.
Alzheimer’s disease the amyloid cascade hypothesis presentationBeshr Nammouz
The amyloid cascade hypothesis proposes that amyloid-beta protein (AβP) deposition in the brain is the primary cause of Alzheimer's disease (AD). AβP is produced when a larger amyloid precursor protein is cleaved by secretase enzymes. According to the hypothesis, AβP or its fragments trigger a cascade that results in neurofibrillary tangles, neural cell loss, and dementia. While evidence supports many aspects of the hypothesis, questions remain about whether AβP is the initial cause or a result of neurodegeneration in AD.
1) Alzheimer's disease is an irreversible, progressive brain disease that slowly destroys cognitive functions through gradual impairment of higher intellectual functions and severe cortical dysfunction, leading to memory loss and aphasia.
2) The biochemical hallmarks of Alzheimer's are beta-amyloid plaques and neurofibrillary tangles involving the tau protein. Beta-amyloid plaques accumulate outside and around nerve cells, while neurofibrillary tangles are twisted fibers that build up inside nerve cells.
3) The formation of beta-amyloid plaques and neurofibrillary tangles can affect neighboring cells and lead to more cell death, resulting in massive cell death in the brain and causing the memory failure and other symptoms
Ms. Ritika Soni presented on Alzheimer's disease. Alzheimer's is a progressive brain disorder that causes memory loss and cognitive decline. It was first described by Dr. Alois Alzheimer in 1906 from examining a patient with unusual brain abnormalities. The causes are not fully known but risk factors include age, family history, and head injuries. Diagnosis involves cognitive assessments and brain imaging. Currently, there is no cure, but medications and caregiving can temporarily improve symptoms.
Alzheimer's disease is a neurological disorder that causes memory loss and cognitive decline due to the death of brain cells. It starts mildly and progresses worse over time. The disease is characterized by the formation of amyloid plaques and neurofibrillary tangles in the brain due to the death of neurons, which causes memory loss. It has no cure and treatments like anticholinesterase inhibitors only manage symptoms.
1. Alzheimer's disease is a progressive brain disorder that destroys memory and thinking skills. The main pathologies are amyloid plaques and neurofibrillary tangles in the brain.
2. There are three stages of Alzheimer's: mild, moderate, and severe. Symptoms worsen over time and include memory loss, impaired judgment, and changes in mood and personality.
3. Risk factors include age, family history, and genetics. The disease causes cell damage and loss in areas of the brain involved in memory and cognition.
The passage discusses the pathophysiology of Alzheimer's disease, outlining several hypotheses for its causes including the amyloid hypothesis, vascular hypothesis, glutamatergic hypothesis, and cholinergic hypothesis. It notes risk factors like age, neurotransmitter deficiencies, head trauma, and genetics. The amyloid hypothesis suggests abnormal amyloid protein precursor cleavage leads to amyloid plaques and neurofibrillary tangles, while other hypotheses implicate vascular factors, glutamate receptor activation, and acetylcholine loss in neuronal death and cognitive impairment.
Alzheimer's and Parkinson's disease common causeerickrodriguez
This document proposes that there is a common cause of Alzheimer's and Parkinson's diseases. It hypothesizes that the accumulation of beta-amyloid and alpha-synuclein proteins leads to the formation of a hybrid protein that alters neuronal activity and causes neurodegeneration. The study aims to create this hybrid protein in vitro, insert it into mice brains, and examine its effects through in vivo experimentation and comparison to control mice in order to better understand the link between the two diseases.
Alzheimer’s disease the amyloid cascade hypothesis presentationBeshr Nammouz
The amyloid cascade hypothesis proposes that amyloid-beta protein (AβP) deposition in the brain is the primary cause of Alzheimer's disease (AD). AβP is produced when a larger amyloid precursor protein is cleaved by secretase enzymes. According to the hypothesis, AβP or its fragments trigger a cascade that results in neurofibrillary tangles, neural cell loss, and dementia. While evidence supports many aspects of the hypothesis, questions remain about whether AβP is the initial cause or a result of neurodegeneration in AD.
1) Alzheimer's disease is an irreversible, progressive brain disease that slowly destroys cognitive functions through gradual impairment of higher intellectual functions and severe cortical dysfunction, leading to memory loss and aphasia.
2) The biochemical hallmarks of Alzheimer's are beta-amyloid plaques and neurofibrillary tangles involving the tau protein. Beta-amyloid plaques accumulate outside and around nerve cells, while neurofibrillary tangles are twisted fibers that build up inside nerve cells.
3) The formation of beta-amyloid plaques and neurofibrillary tangles can affect neighboring cells and lead to more cell death, resulting in massive cell death in the brain and causing the memory failure and other symptoms
Ms. Ritika Soni presented on Alzheimer's disease. Alzheimer's is a progressive brain disorder that causes memory loss and cognitive decline. It was first described by Dr. Alois Alzheimer in 1906 from examining a patient with unusual brain abnormalities. The causes are not fully known but risk factors include age, family history, and head injuries. Diagnosis involves cognitive assessments and brain imaging. Currently, there is no cure, but medications and caregiving can temporarily improve symptoms.
Alzheimer's disease is a neurological disorder that causes memory loss and cognitive decline due to the death of brain cells. It starts mildly and progresses worse over time. The disease is characterized by the formation of amyloid plaques and neurofibrillary tangles in the brain due to the death of neurons, which causes memory loss. It has no cure and treatments like anticholinesterase inhibitors only manage symptoms.
1. Alzheimer's disease is a progressive brain disorder that destroys memory and thinking skills. The main pathologies are amyloid plaques and neurofibrillary tangles in the brain.
2. There are three stages of Alzheimer's: mild, moderate, and severe. Symptoms worsen over time and include memory loss, impaired judgment, and changes in mood and personality.
3. Risk factors include age, family history, and genetics. The disease causes cell damage and loss in areas of the brain involved in memory and cognition.
The passage discusses the pathophysiology of Alzheimer's disease, outlining several hypotheses for its causes including the amyloid hypothesis, vascular hypothesis, glutamatergic hypothesis, and cholinergic hypothesis. It notes risk factors like age, neurotransmitter deficiencies, head trauma, and genetics. The amyloid hypothesis suggests abnormal amyloid protein precursor cleavage leads to amyloid plaques and neurofibrillary tangles, while other hypotheses implicate vascular factors, glutamate receptor activation, and acetylcholine loss in neuronal death and cognitive impairment.
Alzheimer's and Parkinson's disease common causeerickrodriguez
This document proposes that there is a common cause of Alzheimer's and Parkinson's diseases. It hypothesizes that the accumulation of beta-amyloid and alpha-synuclein proteins leads to the formation of a hybrid protein that alters neuronal activity and causes neurodegeneration. The study aims to create this hybrid protein in vitro, insert it into mice brains, and examine its effects through in vivo experimentation and comparison to control mice in order to better understand the link between the two diseases.
Alzheimer's disease (AD) is the most common cause of mental dementia in the aged population.
AD is characterized by the progressive decline of memory and multiple cognitive functions, as well as changes in behavior and personality
AD pathology is characterized by the formation of two types of protein aggregates in the brain: amyloid plaques — which form an extracellular lesion composed of the Aβ peptide; and intracellular neurofibrillary tangles) — which are composed of hyperphosphorylated filaments of the microtubule-associated protein tau.
AD is also associated with inflammatory responses, synaptic damage, changes in hormonal levels, and mitochondrial structural and functional abnormalitie.
the molecular events leading to synaptic loss in AD are unknown
The document provides an overview of Alzheimer's disease including its causes, symptoms, diagnosis and potential treatments. It discusses how the disease is characterized by progressive cognitive decline and brain cell loss and death. The main causes proposed are the amyloid hypothesis, which suggests beta-amyloid plaques are fundamental, and the cholinergic hypothesis, which implicates reduced acetylcholine levels. The mechanisms involve plaque and tangle formations that disrupt cell signaling in the brain and its neuron transport system.
Alzheimer's disease is a progressive brain disorder that destroys memory and thinking skills. The document discusses the risk factors, symptoms, pathogenesis, therapeutic targets, and treatment of Alzheimer's disease. It summarizes that current therapies can temporarily ease symptoms but effective disease-modifying drugs are still being researched as the pathogenesis is complex, involving both genetic and environmental factors.
This document summarizes the molecular basis of Alzheimer's disease. It begins by describing Alzheimer's as a progressive neurodegenerative disorder characterized by memory loss and cognitive decline. Key pathological features are amyloid plaques and neurofibrillary tangles in the brain. The accumulation of these proteins is thought to lead to synaptic loss, neuronal death, and the cognitive symptoms of the disease. Current drug therapies can only temporarily improve symptoms but do not stop the underlying disease progression. Researchers are actively investigating strategies to modify the disease course by targeting amyloid production, clearance, or aggregation in the brain. While promising approaches are being studied, there are currently no approved disease-modifying treatments for Alzheimer's.
This document provides an overview of Alzheimer's disease (AD), including its history, pathogenesis, genetics, and discussion. The key points are:
- AD is a progressive brain disorder that causes memory loss and cognitive decline. It results from amyloid beta plaques and neurofibrillary tangles that damage neurons.
- The amyloid cascade hypothesis proposes that amyloid beta formation from amyloid precursor protein cleavage is the key initiating event leading to AD. Aggregation of amyloid beta and tau proteins into plaques and tangles ultimately kills neurons.
- Genetic factors like mutations on chromosomes 21, 14 and 1 can cause early-onset familial AD, while the APOE ε4 allele increases risk for late-onset
Alzheimer's is a type of dementia that affects memory, thinking and behavior, Symptoms eventually grow severe enough to interfere with daily tasks. Subscribe to E-News to learn how you can help those affected by Alzheimer's. Understanding Alzheimer's and dementia.
Alzheimer's disease is thought to be caused by the abnormal build-up of proteins in and around brain cells.
Neurodegenerative disorders are characterized by the progressive and irreversible loss of neurons in specific brain regions. Alzheimer's disease is the most common cause of dementia and results from the loss of neurons in the hippocampus and cortex, leading to impairments in memory and cognitive ability. The hallmarks of Alzheimer's disease are extracellular amyloid plaques and intracellular neurofibrillary tangles composed of tau protein. Risk factors for the disease are unknown but it is associated with brain shrinkage and neuronal loss, particularly in the hippocampus and basal forebrain. Symptoms include confusion, memory loss, impaired judgment, and personality changes.
This is a public domain presentation used to test Powerpoint embedding on a Joomla site.
This is a public domain presentation used to test Powerpoint embedding on a Joomla site
This is a public domain presentation used to test Powerpoint embedding on a Joomla site
This document discusses Alzheimer's disease, including its causes, symptoms, stages of progression, diagnosis, current treatments, and potential new treatments in development. Specifically, it describes how Alzheimer's is characterized by beta-amyloid plaque and tau protein tangle buildup in the brain, outlines the four stages of the disease and their symptoms, and discusses several FDA-approved medications commonly used to treat symptoms, including Aricept, Exelon, Razadyne, and Namenda. It also mentions two new compounds in clinical trials, a beta-secretase inhibitor and NIC5-15, that may help slow the disease's progression.
1) Alzheimer's disease is a progressive brain disorder that destroys memory and thinking skills. It was first described by Alois Alzheimer in 1906 and is the most common form of dementia.
2) The disease is characterized by beta-amyloid plaques and tau protein tangles that build up in the brain, resulting in the loss of connections between neurons and death of brain cells. This leads to the symptoms of impaired memory, thinking, and behavior.
3) While the causes of Alzheimer's are not fully known, genetic and environmental factors are believed to play a role. Risk increases significantly with age, though early-onset Alzheimer's can occur much earlier. There is currently no cure for the disease.
1) Alzheimer's disease is a degenerative brain disorder and the most common form of dementia that usually starts in late middle age or old age, resulting in progressive memory loss, impaired thinking, and disorientation.
2) It is a chronic and irreversible disease that affects brain cells and causes impairment of intellectual functioning, destroying the ability to reason, remember, imagine and learn over time.
3) The causes of Alzheimer's disease are unknown but several factors have been implicated including environmental factors like smoking, infections, and toxins as well as genetic and immunological factors.
This Slide describes progression of alzheimer disease and the changes that occurs in alzheimer disease. Also it describes how the disease progress to different parts of brain and which different part of brain are involved in it. It is made by Gopal Agarwal, Ph.D Research Scholar, NIPER-Ahmedabad
the feathers of the disease and It is histology
For downloading the presentation, more presentations , infographics and blogs visit :
studyscienceblog.wordpress.com
This document summarizes information about Alzheimer's disease from a student paper, including descriptions of symptoms, causes, pathophysiology and treatment options. It discusses how Alzheimer's is a progressive neurodegenerative disorder causing dementia. Key pathological features are amyloid plaques and neurofibrillary tangles in the brain. Current treatments aim to improve cognitive symptoms and include cholinesterase inhibitors such as donepezil for mild-moderate cases and memantine for moderate-severe cases. Several drug trials are also mentioned.
This document discusses Alzheimer's disease including its causes, symptoms, diagnosis and treatment. It is a neurodegenerative disease that causes memory loss and cognitive decline. The main pathologies involved are beta-amyloid plaques and neurofibrillary tangles composed of tau proteins. Diagnosis involves assessing cognitive impairment and ruling out other conditions, while treatments can help symptoms but currently there is no cure as brain cells continue to be lost.
This document discusses Alzheimer's disease (AD), including its definition, etiology, risk factors, pathophysiology, clinical symptoms, diagnosis, and treatment. Some key points include:
- AD is the most common cause of dementia and is characterized by cognitive and behavioral impairment. While the exact cause is unknown, risk factors include age, family history, and genetics such as the APOE E4 allele.
- Pathologically, AD is defined by amyloid plaques and neurofibrillary tangles in the brain. It results from the death of brain cells, affecting processes like memory, thinking, and behavior.
- Diagnosis involves assessing symptoms, ruling out other conditions through tests, and structural imaging of the brain
Alzheimer's disease is a progressive brain disorder that destroys memory and thinking skills. It is caused by plaques and tangles that build up in the brain, killing brain cells. As more brain cells die, the parts of the brain that control thought, memory and language deteriorate. Symptoms usually start with mild memory loss but worsen to include problems with thinking, reasoning and communication. Currently, there is no cure for Alzheimer's but treatments can temporarily slow the worsening of symptoms and improve quality of life. Research continues to find better treatments and preventions for this disease.
The document discusses Alzheimer's disease (AD), including its causes, symptoms, diagnosis, and treatment. It provides details on:
- AD is characterized by beta-amyloid plaques and tau neurofibrillary tangles in the brain that lead to nerve cell death. Genetic and lifestyle factors may contribute to causes.
- Symptoms progress from mild memory loss to severe cognitive decline and inability for self-care. Stages include mild, moderate, and severe.
- Diagnosis involves assessing cognitive impairment and ruling out other conditions. Imaging and neurological tests are also used.
- Current treatments aim to slow progression and manage symptoms. These include cholinesterase inhibitors and memantine which increase
Alzheimer's disease (AD) is a progressive neurodegenerative disorder and the most common cause of dementia. It is characterized by deposition of beta-amyloid plaques and tau neurofibrillary tangles in the brain, leading to neuronal damage and loss. There is also marked deficiency of the neurotransmitter acetylcholine in the brain. Cognition enhancers aim to improve cognitive functions by various mechanisms like increasing cerebral blood flow, enhancing neurotransmission, and improving neuronal metabolism. Common cognition enhancers discussed for AD include cholinesterase inhibitors (rivastigmine, donepezil, galantamine), which aim to increase acetylcholine levels, and memantine, an NMDA receptor antagonist that blocks glutamate exc
Emerging Trends in Alzheimer’s Disease by Dr. Seema.pptDrSeemaBansal
Emerging Trends in Alzheimer’s Disease discusses the pathogenesis and treatment approaches for Alzheimer's disease (AD). There are currently medications to treat mild to moderate AD symptoms, while research explores new treatments. The document outlines several hypotheses for AD causes, including amyloid plaques, neurofibrillary tangles, and cholinergic dysfunction. Therapies target these pathways through secretase inhibitors, vaccines, and other methods. Epidemiological studies examine lifestyle factors that may influence AD risk or protection. Advances in diagnosis include neuroimaging and biomarkers to detect signs of AD earlier.
Alzheimer's disease (AD) is the most common cause of mental dementia in the aged population.
AD is characterized by the progressive decline of memory and multiple cognitive functions, as well as changes in behavior and personality
AD pathology is characterized by the formation of two types of protein aggregates in the brain: amyloid plaques — which form an extracellular lesion composed of the Aβ peptide; and intracellular neurofibrillary tangles) — which are composed of hyperphosphorylated filaments of the microtubule-associated protein tau.
AD is also associated with inflammatory responses, synaptic damage, changes in hormonal levels, and mitochondrial structural and functional abnormalitie.
the molecular events leading to synaptic loss in AD are unknown
The document provides an overview of Alzheimer's disease including its causes, symptoms, diagnosis and potential treatments. It discusses how the disease is characterized by progressive cognitive decline and brain cell loss and death. The main causes proposed are the amyloid hypothesis, which suggests beta-amyloid plaques are fundamental, and the cholinergic hypothesis, which implicates reduced acetylcholine levels. The mechanisms involve plaque and tangle formations that disrupt cell signaling in the brain and its neuron transport system.
Alzheimer's disease is a progressive brain disorder that destroys memory and thinking skills. The document discusses the risk factors, symptoms, pathogenesis, therapeutic targets, and treatment of Alzheimer's disease. It summarizes that current therapies can temporarily ease symptoms but effective disease-modifying drugs are still being researched as the pathogenesis is complex, involving both genetic and environmental factors.
This document summarizes the molecular basis of Alzheimer's disease. It begins by describing Alzheimer's as a progressive neurodegenerative disorder characterized by memory loss and cognitive decline. Key pathological features are amyloid plaques and neurofibrillary tangles in the brain. The accumulation of these proteins is thought to lead to synaptic loss, neuronal death, and the cognitive symptoms of the disease. Current drug therapies can only temporarily improve symptoms but do not stop the underlying disease progression. Researchers are actively investigating strategies to modify the disease course by targeting amyloid production, clearance, or aggregation in the brain. While promising approaches are being studied, there are currently no approved disease-modifying treatments for Alzheimer's.
This document provides an overview of Alzheimer's disease (AD), including its history, pathogenesis, genetics, and discussion. The key points are:
- AD is a progressive brain disorder that causes memory loss and cognitive decline. It results from amyloid beta plaques and neurofibrillary tangles that damage neurons.
- The amyloid cascade hypothesis proposes that amyloid beta formation from amyloid precursor protein cleavage is the key initiating event leading to AD. Aggregation of amyloid beta and tau proteins into plaques and tangles ultimately kills neurons.
- Genetic factors like mutations on chromosomes 21, 14 and 1 can cause early-onset familial AD, while the APOE ε4 allele increases risk for late-onset
Alzheimer's is a type of dementia that affects memory, thinking and behavior, Symptoms eventually grow severe enough to interfere with daily tasks. Subscribe to E-News to learn how you can help those affected by Alzheimer's. Understanding Alzheimer's and dementia.
Alzheimer's disease is thought to be caused by the abnormal build-up of proteins in and around brain cells.
Neurodegenerative disorders are characterized by the progressive and irreversible loss of neurons in specific brain regions. Alzheimer's disease is the most common cause of dementia and results from the loss of neurons in the hippocampus and cortex, leading to impairments in memory and cognitive ability. The hallmarks of Alzheimer's disease are extracellular amyloid plaques and intracellular neurofibrillary tangles composed of tau protein. Risk factors for the disease are unknown but it is associated with brain shrinkage and neuronal loss, particularly in the hippocampus and basal forebrain. Symptoms include confusion, memory loss, impaired judgment, and personality changes.
This is a public domain presentation used to test Powerpoint embedding on a Joomla site.
This is a public domain presentation used to test Powerpoint embedding on a Joomla site
This is a public domain presentation used to test Powerpoint embedding on a Joomla site
This document discusses Alzheimer's disease, including its causes, symptoms, stages of progression, diagnosis, current treatments, and potential new treatments in development. Specifically, it describes how Alzheimer's is characterized by beta-amyloid plaque and tau protein tangle buildup in the brain, outlines the four stages of the disease and their symptoms, and discusses several FDA-approved medications commonly used to treat symptoms, including Aricept, Exelon, Razadyne, and Namenda. It also mentions two new compounds in clinical trials, a beta-secretase inhibitor and NIC5-15, that may help slow the disease's progression.
1) Alzheimer's disease is a progressive brain disorder that destroys memory and thinking skills. It was first described by Alois Alzheimer in 1906 and is the most common form of dementia.
2) The disease is characterized by beta-amyloid plaques and tau protein tangles that build up in the brain, resulting in the loss of connections between neurons and death of brain cells. This leads to the symptoms of impaired memory, thinking, and behavior.
3) While the causes of Alzheimer's are not fully known, genetic and environmental factors are believed to play a role. Risk increases significantly with age, though early-onset Alzheimer's can occur much earlier. There is currently no cure for the disease.
1) Alzheimer's disease is a degenerative brain disorder and the most common form of dementia that usually starts in late middle age or old age, resulting in progressive memory loss, impaired thinking, and disorientation.
2) It is a chronic and irreversible disease that affects brain cells and causes impairment of intellectual functioning, destroying the ability to reason, remember, imagine and learn over time.
3) The causes of Alzheimer's disease are unknown but several factors have been implicated including environmental factors like smoking, infections, and toxins as well as genetic and immunological factors.
This Slide describes progression of alzheimer disease and the changes that occurs in alzheimer disease. Also it describes how the disease progress to different parts of brain and which different part of brain are involved in it. It is made by Gopal Agarwal, Ph.D Research Scholar, NIPER-Ahmedabad
the feathers of the disease and It is histology
For downloading the presentation, more presentations , infographics and blogs visit :
studyscienceblog.wordpress.com
This document summarizes information about Alzheimer's disease from a student paper, including descriptions of symptoms, causes, pathophysiology and treatment options. It discusses how Alzheimer's is a progressive neurodegenerative disorder causing dementia. Key pathological features are amyloid plaques and neurofibrillary tangles in the brain. Current treatments aim to improve cognitive symptoms and include cholinesterase inhibitors such as donepezil for mild-moderate cases and memantine for moderate-severe cases. Several drug trials are also mentioned.
This document discusses Alzheimer's disease including its causes, symptoms, diagnosis and treatment. It is a neurodegenerative disease that causes memory loss and cognitive decline. The main pathologies involved are beta-amyloid plaques and neurofibrillary tangles composed of tau proteins. Diagnosis involves assessing cognitive impairment and ruling out other conditions, while treatments can help symptoms but currently there is no cure as brain cells continue to be lost.
This document discusses Alzheimer's disease (AD), including its definition, etiology, risk factors, pathophysiology, clinical symptoms, diagnosis, and treatment. Some key points include:
- AD is the most common cause of dementia and is characterized by cognitive and behavioral impairment. While the exact cause is unknown, risk factors include age, family history, and genetics such as the APOE E4 allele.
- Pathologically, AD is defined by amyloid plaques and neurofibrillary tangles in the brain. It results from the death of brain cells, affecting processes like memory, thinking, and behavior.
- Diagnosis involves assessing symptoms, ruling out other conditions through tests, and structural imaging of the brain
Alzheimer's disease is a progressive brain disorder that destroys memory and thinking skills. It is caused by plaques and tangles that build up in the brain, killing brain cells. As more brain cells die, the parts of the brain that control thought, memory and language deteriorate. Symptoms usually start with mild memory loss but worsen to include problems with thinking, reasoning and communication. Currently, there is no cure for Alzheimer's but treatments can temporarily slow the worsening of symptoms and improve quality of life. Research continues to find better treatments and preventions for this disease.
The document discusses Alzheimer's disease (AD), including its causes, symptoms, diagnosis, and treatment. It provides details on:
- AD is characterized by beta-amyloid plaques and tau neurofibrillary tangles in the brain that lead to nerve cell death. Genetic and lifestyle factors may contribute to causes.
- Symptoms progress from mild memory loss to severe cognitive decline and inability for self-care. Stages include mild, moderate, and severe.
- Diagnosis involves assessing cognitive impairment and ruling out other conditions. Imaging and neurological tests are also used.
- Current treatments aim to slow progression and manage symptoms. These include cholinesterase inhibitors and memantine which increase
Alzheimer's disease (AD) is a progressive neurodegenerative disorder and the most common cause of dementia. It is characterized by deposition of beta-amyloid plaques and tau neurofibrillary tangles in the brain, leading to neuronal damage and loss. There is also marked deficiency of the neurotransmitter acetylcholine in the brain. Cognition enhancers aim to improve cognitive functions by various mechanisms like increasing cerebral blood flow, enhancing neurotransmission, and improving neuronal metabolism. Common cognition enhancers discussed for AD include cholinesterase inhibitors (rivastigmine, donepezil, galantamine), which aim to increase acetylcholine levels, and memantine, an NMDA receptor antagonist that blocks glutamate exc
Emerging Trends in Alzheimer’s Disease by Dr. Seema.pptDrSeemaBansal
Emerging Trends in Alzheimer’s Disease discusses the pathogenesis and treatment approaches for Alzheimer's disease (AD). There are currently medications to treat mild to moderate AD symptoms, while research explores new treatments. The document outlines several hypotheses for AD causes, including amyloid plaques, neurofibrillary tangles, and cholinergic dysfunction. Therapies target these pathways through secretase inhibitors, vaccines, and other methods. Epidemiological studies examine lifestyle factors that may influence AD risk or protection. Advances in diagnosis include neuroimaging and biomarkers to detect signs of AD earlier.
The document discusses Alzheimer's disease and treatments. It defines Alzheimer's as a progressive brain disease that destroys memory and cognitive functions. Symptoms include memory loss, mood changes, and problems completing tasks. Diagnosis involves tests like PET scans, cognitive assessments, and neurological exams. The disease is characterized by beta-amyloid plaques and neurofibrillary tangles in the brain. Current treatments aim to improve symptoms and slow progression by inhibiting acetylcholinesterase or blocking NMDA receptors, such as donepezil, rivastigmine, memantine, and galantamine.
Pharmacotherapy of Neurodegenrative diseases DrSnehaDange
This document provides an overview of various neurodegenerative diseases and their pharmacotherapy. It discusses the mechanism of neuronal cell death including protein misfolding and aggregation, excitotoxicity, and apoptosis. Several neurodegenerative diseases are then examined in more detail, including Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis, Huntington's disease, and others. For each disease, the document discusses aspects such as pathology, genetics, clinical features, and pharmacotherapy options.
1) Alzheimer's disease is a progressive brain disorder that destroys memory and thinking skills, and is the most common cause of dementia.
2) It is characterized by beta-amyloid plaques and tau protein tangles in the brain that disrupt communication between neurons.
3) Current treatments aim to improve symptoms but do not stop the progression of the disease. Acetylcholinesterase inhibitors and memantine are the most common drug therapies to improve cognitive function.
This document provides information on various neurological disorders and the central nervous system. It discusses the basic structure and function of the brain and neurons. It then summarizes several major neurodegenerative disorders like Alzheimer's disease, Parkinson's disease, Huntington's disease, amyotrophic lateral sclerosis, multiple sclerosis, and their symptoms, causes, prevalence worldwide, and current treatment approaches. Some key points covered include the role of oxidative stress in neurodegeneration, epidemiology of these disorders in India, and potential herbal treatments from traditional Indian medicine.
1. Alzheimer's disease (AD) is a progressive brain disorder that destroys memory and thinking skills. The hallmarks of AD in the brain are beta-amyloid plaques and neurofibrillary tangles.
2. There are two main hypotheses for what causes AD - the amyloid hypothesis and tau hypothesis. The amyloid hypothesis posits that beta-amyloid protein fragments clump together to form plaques outside neurons, killing them. The tau hypothesis suggests abnormal tau proteins form tangles inside neurons, disrupting nutrient transport and killing the cells.
3. AD progresses from the earliest preclinical stage through mild, moderate, and severe stages as more brain regions are affected and cognition declines further. Currently, available
Recent advancement treatment in Alzheimer and Parkinson (2).pptxramgopal236362
This document summarizes recent advancements in the treatment of Alzheimer's and Parkinson's diseases. For Alzheimer's, it discusses amyloid and tau hypotheses and drugs that target cholinergic systems like donepezil. New treatments focus on anti-amyloid therapies through vaccines, antibodies or secretase inhibitors. For Parkinson's, it outlines drugs like levodopa, safinamide, and istradefylline that target motor symptoms. Stem cell therapy and gene therapy show promise to replace lost dopamine neurons. Deep brain stimulation is also discussed as a treatment for advanced Parkinson's.
Etiology of TAU & PLAQUE protein in Alzheimer's Disease PintuLaskar
Details of Alzheimer's Disease and Etiology of Protein.
Under the guidance of
Mr. Nilanjan Adhikari
Assistant professor,Department of Pharmacology
P.G INSTITUTE OF MEDICAL SCIENCES
- Alzheimer's disease (AD) is a progressive dementia characterized by cognitive decline and behavioral changes. It is the most common type of dementia and risk increases with age.
- The pathology of AD involves beta-amyloid plaques and tau neurofibrillary tangles in brain regions critical for memory and cognition. This leads to deficits in the neurotransmitter acetylcholine.
- While the exact causes are unknown, genetic and environmental factors likely contribute. Treatment focuses on managing symptoms with cholinesterase inhibitors or memantine, which target acetylcholine and glutamate pathways respectively. Currently there is no cure for AD.
Alzheimer's disease is a progressive brain disorder that destroys memory and cognitive skills. Dr. Alois Alzheimer first described it in 1906 after examining a woman with dementia. The disease is characterized by beta-amyloid plaques and neurofibrillary tangles in the brain. Current treatments aim to improve symptoms but do not stop the underlying disease process. Researchers are exploring therapies targeting amyloid and tau proteins as well as other mechanisms to find a cure.
Cognitive enhancers such as memantine may play a role in the treatment of dementia. Memantine is an NMDA receptor antagonist that can help moderate glutamate signaling and protect against excitotoxicity. Studies have shown memantine can improve cognition, function, and behavior in patients with moderate to severe Alzheimer's disease when used alone or in combination with cholinesterase inhibitors. Memantine has a good safety profile and may help delay nursing home placement when added to cholinesterase inhibitor treatment of Alzheimer's patients.
The document summarizes recent advances in understanding and treating Alzheimer's disease. It discusses both non-modifiable and modifiable risk factors for the disease. The major signs and symptoms include progressive memory loss and cognitive decline. Alzheimer's is confirmed through neuronal plaques and tangles seen in the brain. Recent treatment strategies aim to reduce amyloid plaques through vaccines, antibodies, and inhibitors of beta- and gamma-secretase. Other approaches include tau phosphorylation inhibitors, therapies for mitochondrial dysfunction, and cholinesterase inhibitors. Animal models continue to be important for studying the human APP, ApoE, and presenilin genes involved in Alzheimer's pathology.
The document discusses the pharmacotherapy of Alzheimer's disease. It defines Alzheimer's as the most common type of dementia and describes its characteristic features and symptoms. The main goals of treatment are symptomatic improvement and disease modification. Current treatments include acetylcholinesterase inhibitors like donepezil which increase acetylcholine levels in the brain, and the NMDA receptor antagonist memantine which blocks glutamate-induced neurotoxicity.
This document provides an overview of neurodegenerative diseases like Parkinson's disease and Alzheimer's disease. It discusses the pathophysiology, symptoms, and pharmacological treatments for each condition. For Parkinson's, it describes how dopamine production decreases and the resulting motor symptoms. Common drugs mentioned include levodopa, dopamine agonists, COMT inhibitors, and anticholinergics. For Alzheimer's, it outlines the amyloid plaque and neurofibrillary tangle pathology and resulting cognitive decline. Cholinesterase inhibitors and memantine are the major pharmaceutical therapies discussed for Alzheimer's treatment. The document concludes by mentioning some newer investigational drugs for both conditions.
Alzheimer's disease is a progressive brain disorder that destroys memory and thinking skills. It is the most common form of dementia. There is no cure for Alzheimer's, but medications and lifestyle interventions can temporarily slow the worsening of symptoms. The disease is caused by plaques and tangles that build up in the brain, resulting in the loss of connections between neurons. Early symptoms include memory loss and problems with thinking and language, while later stages involve the loss of motor skills and ability to communicate. Current treatments approved by the FDA include cholinesterase inhibitors and memantine, which can temporarily slow cognitive decline.
2. Introduction
Risk factor for AD
symptoms of AD
Pathogenesis of AD
Therapeutic targets of AD
Treatment of AD
Conclusion
References
2
3. Alzheimer’s Disease (AD) is an irreversible, progressive brain disease
that slowly destroys memory, cognition, and abilities to function
In most cases, symptoms appear after Age 60
Alzheimer’s Disease is named after Dr. Alois Alzheimer.
In 1906, he noticed changes in the brain tissue of a woman who had died
of an unusual mental illness with symptoms of memory loss, language
problems, and unpredictable behavior.
He examined her brain and found many abnormal clumps and tangled
bundles of fibers (neurofibrillary tangles).
.
3
4. Risk Factors for AD:
1. advancing age
2. family history
3. head trauma
4. lack of mental stimulation = “use it or lose it”
5. Down’s syndrome
6. environmental toxins: aluminum, mercury
7. oxidative stress due to accumulation of free radicals
and/or low antioxidant levels
8. abnormal protein processing
9. neurotransmitter deficit
10. genetic polymorphism
4
5. Repetitive questions or conversations.
Misplacing personal belongings.
Getting lost on a familiar route.
Poor understanding of safety risks.
Poor decision-making ability.
Inability to plan complex or sequential activities.
Speech, spelling, and writing errors.
Early: mild forgetfulness and short-term memory loss
Middle: problems speaking, understanding, reading, or writing
anxiety and aggression
Late: need complete care
complete memory loss, including inability to remember family
5
8. Pathogenesis of AD
“The physiology of AD is “characterized by marked atrophy of the
cerebral cortex and loss of cortical and sub-cortical neurons.”
Amyloid Plaques in the spaces between the brain’s nerve cells.
“The senile plaques are extra cellular proteinaceous deposits of
amyloid-beta (Abeta) peptides.”
amyloid + dead brain cell = amyloid plaque
Neurofibrillary Tangles in the brain’s nerve cells.
“Neurofibrillary tangles consist of paired helical filaments which
are composed of hyperphosphorylated microtubule associated
protein tau.”
tau + dead brain cell = neurofibrillary tangle
9. 1. Abnormalities in APP mutation leads
to its cleavage by β- and γ-secretase
enzymes
3. Deposits as Amyloid Plaques and
impairs synaptic function
2. Neurotoxic Aβ42 peptides released and
aggregate into Oligomers and Amyloid Fibrils
APP: Amyloid Precursor Protein
Aβ42: Toxic Aβ fragments
TARGETS
MK-8931
Solanezumab
12
10. The toxicity of oligomers and amyloid fibrils cause Tau-Hyperphosphorylation leading to
Neurofibrillary Tangles and eventually Neuronal Death.
Apoliopoprotein E gene ε4 allele has
been shown to be a genetic risk
Targets
Aβ pathology begins years before the
onset of Alzheimer’s
13
12. Acetylcholine (Ach) is a CNS messenger
important for learning and memory
Targets:
Ach is degraded by acetylcholinesterase
(AchE)
In AD, Ach level is low due to excessive
degradation by AchE.
Cholinesterase Inhibitors correct the
deficit of Ach by blocking the action of
AchE and thereby increasing the amount
of Ach that remains in the synaptic cleft.
Cholinesterase Inhibitor
1.
1.
2.
2.
3.
3.
Ach: Acetylcholine
AchE: Acetylcholinesterase
ChEIs: Cholinesterase Inhibitors
As disease progress, the brain gradually
produces less acetylcholine and ChEIs
may lost their effect.
4.
9
13. 1. Glutamate is an excitatory
neurotransmitter involved in cognition
and higher mental function.
2. In AD, abnormalities in NMDA
receptors and excess glutamate in the
synapse due to failure of reuptake
3. Excess glutamate causes release of
excess excitatory ions leading to
excitotoxicity and neuronal death.
4. NMDA Antagonists modulates the
NMDA receptor during the excessive
glutamate stimulation
NMDA: N-Methyl D-Aspartate
NMDA-R: NMDA Receptors
10
14. Alzheimer’s Disease
PREVENT TANGLES BY DELAYING PLAQUE FORMATION
About 10-15 years after plaque formation, Neurofibrillary Tangles form and cause Neuronal
Death
TARGETED THERAPIES
Aβ Inhibitors
Immunotherapy
Diabetes Medications
EARLY PREVENTION OF DISEASE PROGRESSION
Delaying disease onset by targeting the underlying mechanism
Previous Prevention Treatments without Significant Results
Immunotherapy Bapineuzumab, AN-1792
Aβ Inhibitors Tramiprostate, Latrepirdine, Semagacestat
DM Medications Rosiglitazone
Others Hormone Replacement Therapy, NSAIDs, Gingko Biloba
11
15. Mechanism of action :
MK-8931 is a potent BACE 1 (β site APP Cleaving Enzyme 1)
Inhibitor
Reduces neurotoxic Aβ peptide production by inhibiting the β-
secretase from cleaving APP
Therefore reducing Amyloid Plaque formation and delaying
Tangle formation, neuronal degeneration and progression of
Alzheimer’s-aaCLI
NICAL DATA
15
16. Mechanism of Action:
Humanized anti-Aβ peptide immunoglobulin G-1 monoclonal
antibody
Binds with high affinity to the deposited soluble Aβ42 peptides
and mobilizes them
Thereby decreasing amyloid plaque formation and slowing the
progression to Alzheimer’s
Solanezumab
16
17. 1. Glucose enters the brain via Glucose
Transporters (GLUT) at the BBB
2. Brain glucose is converted to ATP energy to
maintain normal neuronal functions such as
cognition and learning.
4. Cerebral energy depletion causing oxidative
stress and inflammation
3. In AD, significant reduction in brain glucose
metabolism and transport
5. Initiates neurodegeneration by amyloid
deposition and abnormal tau phosphorylation
6. Synaptic injury and dysfunction leading to
cognitive impairments
ATP: Adenosine Triphosphate
NFT: Neurofibrillary Tangles
BBB: Blood Brain Barrier
Blood Brain Barrier
17
18. 2. Insulin mitigates hippocampal synapse
vulnerability to β-amyloid and protects against
the detrimental effects of Aβ peptides on
synapses
3. In AD, insulin resistance in the brain and
decreased CSF levels of insulin due to impaired
transport of insulin at the BBB
4. Glucose metabolism and Insulin sensitivity is
decreased by 50% in AD and continues to
decrease throughout disease progression
1. Neurons highly express Insulin receptors with
an important role in brain glucose metabolism
including the regulation of neuronal
development, memory and learning processes
18
19. MECHANISM OF ACTION
Potent agonist of PPAR-y (peroxisome proliferator-activated receptor
gamma), which is found in tissues sensitive to insulin action.
Crosses the BBB and regulates glucose and lipid metabolism in
neuronal cells and prevents glucose deprivation-induced neuronal
death.
MECHANISM OF ACTION
Brain insulin receptors are densely localized in the hippocampus
and modulates the levels of Aβ and protects against the
detrimental effects of Aβ oligomers on synapses.
Peripheral administration of insulin is not viable due to the risk of
hypoglycemia.
INI provides rapid delivery of insulin to the CNS without
adversely affecting blood insulin or glucose levels. (Expected to
increase insulin levels in CSF within 60 mins)
19
21. 1. Symptomatic Treatments:
- Acetylcholinesterase Inhibitors
- NMDA-receptor Antagonists
- Nicotinic-receptor Agonists
2. Disease-modifying Treatments:
- Inhibition of amyloid formation: beta and gamma-secretase inhibitors
- Inhibition of abeta aggregation
- Tau phosphorylation inhibitors
3. Other Therapies:
- Cholesterol-lowering therapies
- Anti-inflammatory therapies
- Therapies involving antioxidants: vitamin E and gingko biloba
- Therapies involving neurotrophic factors: nerve growth factor (NGF) and estrogen
4. The “Do-It-Yourself” Approach:
- Diet control
- Use of exercise
- Stress control
- Herbal remedies
- Use it or Lose it!
5. Psychotic Treatments:
- Antidepressants [depression]
- Anxiolytics [anxiety]
- Antipsychotics [severe confusion, paranoia, and hallucinations]
22
22. 1. Symptomatic Treatments:
Treatment of mild to moderate dementia of the Alzheimer's type
- Acetylcholinesterase Inhibitors
- tacrine [Cognex®]
- donepezil [Aricept®]
- rivastigmine [Exelon®]
- galantamine [Razadyne®, formerly Reminyl®]
- NMDA-receptor Antagonists
- memantine [Namenda®]
- Nicotinic-receptor Agonists
23
23. 2. Disease-modifying Treatments:
Treatment of moderate to severe dementia of the Alzheimer's type
- Inhibition of amyloid formation
1. gamma-secretase inhibitors
-Semagacestat,avagacestat(ongoing)
2.Beta-secretase inhibitors
-GRL-834,TAK-070
- Inhibition of abeta aggregation
1.solanezumab 2.ponezumab,Curcumin(ongoing)
- Tau phosphorylation inhibitors
1.Methylene blue,NAP,
2.Lithium salts,valproate
24
27. The pathogenesis of AD is a complex process
involving both genetic and environmental factors;
therefore development of effective disease-modifying
drugs is proving to be a difficult task. Current therapies
for patients with AD may ease symptoms by providing
temporary improvement and reducing the rate of
cognitive decline. The concurrent treatment & drug
agent for AD are under research.
27
28. 1. Alzheimer’s Disease. Alzheimer’s Disease Education & Referral Center. National Institute on Aging. National
Institutes of Health. NIH Publication. 11-6423.
2. Alzheimer’s Disease Medications. Alzheimer’s Disease Education & Referral Center. National Institute on
Aging. National Institutes of Health. NIH Publication. 08-3431
3. Tomohiro C. Emerging Therapeutic Strategies in Alzheimer’s Disease. InTech.
4. Christensen D. Alzheimer‘s Disease: Progress in the Development of Anti-amyloid Disease-Modifying
Therapies
5. Francis P, Parsons C, Jones R. Rationale for Combining Glutamatergic and Cholinergic Approaches in the
Symptomatic Treatment of Alzheimer’s Disease. Neurotherapeutics. 2012;12(11):1351-1365
6. Alzheimer’s Disease Trials. ClinicalTrials.gov
7. Kaushik S, DeSilva S, Abbruscato T. The Role of Glucose Transporters in Brain Disease: Diabetes and
Alzheimer’s Disease. International Journal of Molecular Sciences. 2012;13(10):12629-12655
8. Craft S, Baker L, Montine T, et al. Intranasal Insulin Therapy for Alzheimer Disease and Amnestic Mild
Cognitive Impairment. JAMA Neurology. 2012;69(1):29-38
9. Ivan Aprahamian*, Florindo Stella*+ & Orestes V. Forlenza*. New treatment strategies for Alzheimer’s disease .
Indian J Med Res 138 October 2013, pp 449-460
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