Serotonin (5-HT) is an important neurotransmitter that is synthesized from tryptophan. It acts through 14 different receptor subtypes located throughout the body. 5-HT is involved in many physiological functions like mood, vomiting, smooth muscle contraction, and platelet aggregation. Drugs that modulate 5-HT receptors or reuptake can be used to treat conditions like migraine, anxiety, vomiting, and gastrointestinal disorders. Specifically, triptans like sumatriptan are effective acute treatments for migraine while methysergide and propranolol can be used preventatively due to 5-HT's role in trigeminal nerve activation and neurogenic inflammation during migraine attacks.
Neurohumoral transmission in CNS-
The term neurohumoral transmission designates the transfer of a nerve impulse from a presynaptic to a postsynaptic neuron by means of a humoral agent e.g. a biogenic amine, an amino acid or a peptide.
Autacoids - pharmacological actions and drugs related to them. SIVASWAROOP YARASI
Autacoids or "autocoids" are biological factors which act like local hormones, have a brief duration, and act near the site of synthesis. The word autacoids comes from the Greek "autos" (self) and "acos" (relief, i.e. drug).
5-Hydroxytryptamine & it’s Antagonist is a Topic in Pharmacology which will defiantly Help You in pharmacy field All information is related to pharmacology drug acting and it's effect on body. it is collage project given by our department i would like to share with you.
Neurohumoral transmission in CNS-
The term neurohumoral transmission designates the transfer of a nerve impulse from a presynaptic to a postsynaptic neuron by means of a humoral agent e.g. a biogenic amine, an amino acid or a peptide.
Autacoids - pharmacological actions and drugs related to them. SIVASWAROOP YARASI
Autacoids or "autocoids" are biological factors which act like local hormones, have a brief duration, and act near the site of synthesis. The word autacoids comes from the Greek "autos" (self) and "acos" (relief, i.e. drug).
5-Hydroxytryptamine & it’s Antagonist is a Topic in Pharmacology which will defiantly Help You in pharmacy field All information is related to pharmacology drug acting and it's effect on body. it is collage project given by our department i would like to share with you.
Seretonin (5HT) and Its Antagonists PharmacologyPranatiChavan
Serotonin is a chemical that has a wide variety of functions in the human body. It is sometimes called the happy chemical, because it contributes to wellbeing and happiness.
The scientific name for serotonin is 5-hydroxytryptamine, or 5-HT. It is mainly found in the brain, bowels, and blood platelets.
Serotonin is used to transmit messages between nerve cells, it is thought to be active in constricting smooth muscles, and it contributes to wellbeing and happiness, among other things. As the precursor for melatonin, it helps regulate the body’s sleep-wake cycles and the internal clock.
It is thought to play a role in appetite, the emotions, and motor, cognitive, and autonomic functions. However, it is not known exactly if serotonin affects these directly, or if it has an overall role in co-ordinating the nervous system.
Dr. Jibachha Sah,M.V.Sc( Veterinary pharmacology, TU,Nepal),posted lecturer notes on AUTONOMIC AND SYSTEMIC PHARMACOLOGY for B.V.Sc & A.H. 6 th semester veterinary students of College of veterinary science,Nepal Polytechnique Institute, Bharatpur, Bhojard, Chitwan, Nepal.I hope this lecture notes may be beneficial for other Nepalese veterinary students. Please send your comment and suggestion .Email:jibachhashah@gmail.com,moble,00977-9845024121
A power point presentation on thyroid hormones and thyroid inhibitors on subject of pharmacology suitable for reading by undergraduate medical students.
Hello everyone.....I shared a pdf file containing the deep knowledge about HYPERLIPIDEMIA AND THE PHARMACOLOGY OF ANTI-HYPERLIPIDEMIC DRUGS . In the B.pharma 5th semester...there is an most important topic ANTI-HYPERLIPIDEMIC DRUGS in the subject Pharmacology -II so i uploaded this file to help the students about this most important topic.....if u want this assignment in any format....feel free to DM me on my gmail id.....careof22@gmail.com.....THANK YOU
Introduction to Physiological and pathological role of serotonin
Autocoids, Classification, synthesis ,Serotonergic receptors, Physiological actions, Pathophysiological role
Presented by
K.Firdous banu
Department of Pharmacology
Serotonin is major neurotransmitter and affects the physiology of our body. Serotonin antagonists are used in various pathological conditions of body. This is a small presentation showing feature of serotonin.
Seretonin (5HT) and Its Antagonists PharmacologyPranatiChavan
Serotonin is a chemical that has a wide variety of functions in the human body. It is sometimes called the happy chemical, because it contributes to wellbeing and happiness.
The scientific name for serotonin is 5-hydroxytryptamine, or 5-HT. It is mainly found in the brain, bowels, and blood platelets.
Serotonin is used to transmit messages between nerve cells, it is thought to be active in constricting smooth muscles, and it contributes to wellbeing and happiness, among other things. As the precursor for melatonin, it helps regulate the body’s sleep-wake cycles and the internal clock.
It is thought to play a role in appetite, the emotions, and motor, cognitive, and autonomic functions. However, it is not known exactly if serotonin affects these directly, or if it has an overall role in co-ordinating the nervous system.
Dr. Jibachha Sah,M.V.Sc( Veterinary pharmacology, TU,Nepal),posted lecturer notes on AUTONOMIC AND SYSTEMIC PHARMACOLOGY for B.V.Sc & A.H. 6 th semester veterinary students of College of veterinary science,Nepal Polytechnique Institute, Bharatpur, Bhojard, Chitwan, Nepal.I hope this lecture notes may be beneficial for other Nepalese veterinary students. Please send your comment and suggestion .Email:jibachhashah@gmail.com,moble,00977-9845024121
A power point presentation on thyroid hormones and thyroid inhibitors on subject of pharmacology suitable for reading by undergraduate medical students.
Hello everyone.....I shared a pdf file containing the deep knowledge about HYPERLIPIDEMIA AND THE PHARMACOLOGY OF ANTI-HYPERLIPIDEMIC DRUGS . In the B.pharma 5th semester...there is an most important topic ANTI-HYPERLIPIDEMIC DRUGS in the subject Pharmacology -II so i uploaded this file to help the students about this most important topic.....if u want this assignment in any format....feel free to DM me on my gmail id.....careof22@gmail.com.....THANK YOU
Introduction to Physiological and pathological role of serotonin
Autocoids, Classification, synthesis ,Serotonergic receptors, Physiological actions, Pathophysiological role
Presented by
K.Firdous banu
Department of Pharmacology
Serotonin is major neurotransmitter and affects the physiology of our body. Serotonin antagonists are used in various pathological conditions of body. This is a small presentation showing feature of serotonin.
This presentation is about the neurotransmitter 5-HT (serotonin), we focused on its definition, biosynthesis, storage and destruction, with mentioning its both central and peripheral effects, and lastly the serotonin receptors in the human body, as well as their agonist and antagonists.
Lung Cancer: Artificial Intelligence, Synergetics, Complex System Analysis, S...Oleg Kshivets
RESULTS: Overall life span (LS) was 2252.1±1742.5 days and cumulative 5-year survival (5YS) reached 73.2%, 10 years – 64.8%, 20 years – 42.5%. 513 LCP lived more than 5 years (LS=3124.6±1525.6 days), 148 LCP – more than 10 years (LS=5054.4±1504.1 days).199 LCP died because of LC (LS=562.7±374.5 days). 5YS of LCP after bi/lobectomies was significantly superior in comparison with LCP after pneumonectomies (78.1% vs.63.7%, P=0.00001 by log-rank test). AT significantly improved 5YS (66.3% vs. 34.8%) (P=0.00000 by log-rank test) only for LCP with N1-2. Cox modeling displayed that 5YS of LCP significantly depended on: phase transition (PT) early-invasive LC in terms of synergetics, PT N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G1-3, histology, glucose, AT, blood cell circuit, prothrombin index, heparin tolerance, recalcification time (P=0.000-0.038). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early-invasive LC (rank=1), PT N0—N12 (rank=2), thrombocytes/CC (3), erythrocytes/CC (4), eosinophils/CC (5), healthy cells/CC (6), lymphocytes/CC (7), segmented neutrophils/CC (8), stick neutrophils/CC (9), monocytes/CC (10); leucocytes/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5YS of LCP after radical procedures significantly depended on: 1) PT early-invasive cancer; 2) PT N0--N12; 3) cell ratio factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) LC characteristics; 9) LC cell dynamics; 10) surgery type: lobectomy/pneumonectomy; 11) anthropometric data. Optimal diagnosis and treatment strategies for LC are: 1) screening and early detection of LC; 2) availability of experienced thoracic surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) precise prediction; 5) adjuvant chemoimmunoradiotherapy for LCP with unfavorable prognosis.
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Ozempic: Preoperative Management of Patients on GLP-1 Receptor Agonists Saeid Safari
Preoperative Management of Patients on GLP-1 Receptor Agonists like Ozempic and Semiglutide
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ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
Flu Vaccine Alert in Bangalore Karnatakaaddon Scans
As flu season approaches, health officials in Bangalore, Karnataka, are urging residents to get their flu vaccinations. The seasonal flu, while common, can lead to severe health complications, particularly for vulnerable populations such as young children, the elderly, and those with underlying health conditions.
Dr. Vidisha Kumari, a leading epidemiologist in Bangalore, emphasizes the importance of getting vaccinated. "The flu vaccine is our best defense against the influenza virus. It not only protects individuals but also helps prevent the spread of the virus in our communities," he says.
This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
To encourage widespread vaccination, the government is also collaborating with local schools, workplaces, and community centers to facilitate vaccination drives. Special attention is being given to ensuring that the vaccine is accessible to all, including marginalized communities who may have limited access to healthcare.
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These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
New Directions in Targeted Therapeutic Approaches for Older Adults With Mantl...i3 Health
i3 Health is pleased to make the speaker slides from this activity available for use as a non-accredited self-study or teaching resource.
This slide deck presented by Dr. Kami Maddocks, Professor-Clinical in the Division of Hematology and
Associate Division Director for Ambulatory Operations
The Ohio State University Comprehensive Cancer Center, will provide insight into new directions in targeted therapeutic approaches for older adults with mantle cell lymphoma.
STATEMENT OF NEED
Mantle cell lymphoma (MCL) is a rare, aggressive B-cell non-Hodgkin lymphoma (NHL) accounting for 5% to 7% of all lymphomas. Its prognosis ranges from indolent disease that does not require treatment for years to very aggressive disease, which is associated with poor survival (Silkenstedt et al, 2021). Typically, MCL is diagnosed at advanced stage and in older patients who cannot tolerate intensive therapy (NCCN, 2022). Although recent advances have slightly increased remission rates, recurrence and relapse remain very common, leading to a median overall survival between 3 and 6 years (LLS, 2021). Though there are several effective options, progress is still needed towards establishing an accepted frontline approach for MCL (Castellino et al, 2022). Treatment selection and management of MCL are complicated by the heterogeneity of prognosis, advanced age and comorbidities of patients, and lack of an established standard approach for treatment, making it vital that clinicians be familiar with the latest research and advances in this area. In this activity chaired by Michael Wang, MD, Professor in the Department of Lymphoma & Myeloma at MD Anderson Cancer Center, expert faculty will discuss prognostic factors informing treatment, the promising results of recent trials in new therapeutic approaches, and the implications of treatment resistance in therapeutic selection for MCL.
Target Audience
Hematology/oncology fellows, attending faculty, and other health care professionals involved in the treatment of patients with mantle cell lymphoma (MCL).
Learning Objectives
1.) Identify clinical and biological prognostic factors that can guide treatment decision making for older adults with MCL
2.) Evaluate emerging data on targeted therapeutic approaches for treatment-naive and relapsed/refractory MCL and their applicability to older adults
3.) Assess mechanisms of resistance to targeted therapies for MCL and their implications for treatment selection
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?bkling
Are you curious about what’s new in cervical cancer research or unsure what the findings mean? Join Dr. Emily Ko, a gynecologic oncologist at Penn Medicine, to learn about the latest updates from the Society of Gynecologic Oncology (SGO) 2024 Annual Meeting on Women’s Cancer. Dr. Ko will discuss what the research presented at the conference means for you and answer your questions about the new developments.
Pulmonary Thromboembolism - etilogy, types, medical- Surgical and nursing man...VarunMahajani
Disruption of blood supply to lung alveoli due to blockage of one or more pulmonary blood vessels is called as Pulmonary thromboembolism. In this presentation we will discuss its causes, types and its management in depth.
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micro teaching on communication m.sc nursing.pdfAnurag Sharma
Microteaching is a unique model of practice teaching. It is a viable instrument for the. desired change in the teaching behavior or the behavior potential which, in specified types of real. classroom situations, tends to facilitate the achievement of specified types of objectives.
2. • 5-Hydroxytryptamine (5-HT) has important
pharmacological and physiological role in
the body:– Neurotransmitter in CNS
– Regulator of smooth muscle in CVS,GIT
– Regulation of platelet aggregation.
4. Distribution
• GIT enterochromaffin cells (90%)and
myentric plexus.
• Platelets
– diffuse inside from plasma by active
transport , released at site of damage
• Lungs, bone marrow, pineal gland, CNS
5. Serotonin Receptors
• seven main types
• (5-HT1 to 5-HT7).
• 5-HT1, 5-HT2 subdivided
• Total 14 types of 5-HT receptors
present.
6. 5HT present in ↑ concentrations in:
• CNS – midbrain acts as NT
pineal gland as precursor of melatonin
• Blood - platelets
• Gut wall - mucosal enterochromaffin cells
and neurons in myenteric plexus
7. Storage and release
• Stored in storage granules just like catecholamines
• Diffuses over a relatively large region and activate
5-HT receptors located on
dendrites
cell bodies
presynaptic terminals of adjacent neurons
8. Reuptake
• Uptake of 5-HT from the synapse by
specific monoamine transporter
(5-HT reuptake transporter) on presynaptic
neuron.
• There are several different monoamine
transporters.
dopamine transporter
norepinephrine transporter
serotonin transporter
9. Various agents can inhibit 5-HT reuptake
including
•
Cocaine
•
Tricyclic antidepressants
•
Selective serotonin reuptake
inhibitors(SSRIs)
e.g. Fluoxetine
10. Elimination
• Metabolized by MAO and then
Aldehyde dehydrogenase to form
5-hydroxyindole acetic acid(5-HIAA)
• 5-HIAA is excreted in urine
11.
12. Receptors
• 5-HT receptors are located on the cell
membrane of nerve.
• 5-HT3 receptor a ligand gated ion
channel,
all other 5-HT receptors are G-protein
coupled receptors
16. Systemic effects of 5-HT
• CNS – As Neurotransmitter
Functions associated with 5HT pathways are:
Behavioral responses
Feeding behavior
Mood and emotion control
Sleep / wakefulness control
Emetic reflex (esp. chemical triggered)
Control of sensory pathways
16
17. • CVS –
Vasodilation in skeletal ms., coronary bed,
arterioles
Vasoconstriction in all other vessels
B P Triphasic response :
fall – Coronary chemoreflex
rise – Vasoconstriction,↑co
fall - Vasodilation in skeletal M.& arterioles
17
18. • GIT –
Stimulation of smooth ms. contraction
via (5HT2A) receptors on the muscles
(5HT4) receptors in myenteric plexus
Contraction of stomach fundus (5HT2B)
Inhibition of gastric acid-pepsin secretion
• Bronchi - Bronchoconstriction (5HT2A)
• Platelets – platelet aggregation (5HT2A)
18
21. There are indications that
5-HT1A and 5-HT4 agonists as well as
5-HT2, 5-HT3 antagonists and 5-HT uptake
inhibitors may have a role in treatment of
Alzheimer's disease & Amnesia
Serotonin reuptake inhibitors are useful as
antidepressant drugs (non-selective Tricyclic
antidepressants or SSRIs)
21
22. Cisapride
• Has peripheral 5HT4 agonist action
• Useful in GERD, Diabetic gastroparesis
• Releases Ach from cholinergic
neurones in myenteric plexus
• Oral bioavailabilty ~30%
• T ½ 10 hrs
• Reported to cause serious ventricular
arrhythmias
• Others are Renzapride, Mosapride
22
23. Sumatriptan
Selective agonist for 5HT1D and 5HT1B
Useful in acute migraine attack
Bioavailability ~ 15%
Half life 2-3 hrs
Can be given orally, S/C or as nasal
spray
• Can cause chest pain in 5% patients
• Zolmitriptan, Naratriptan can be given
orally, longer acting, safer
•
•
•
•
•
23
24. Buspirone
• Partial agonist at presynaptic 5HT1A
receptors
• Weak D2 blocker
• Useful as anxiolytic
• Rapidly absorbed , undergoes
extensive first pass metabolism
• t ½ 2-4 hrs
• Excreted in urine and faeces
24
25. Ketanserin
• Selective 5HT2 blocker (Stronger for 2A)
• No partial agonistic activity
• Weak α1, H1, Dopaminergic blocker
• Useful in Raynaud’s diasease
• Has antihypertensive activity
• Congener is Ritanserin which is more
selective for 5HT2A
25
26. Cyproheptadine
• 5HT2A antagonist
• Has additional H1 blocking as well as
anticholinergic activity
• Useful in
Carcinoid tumor
Post-gastrectomy dumping
syndrome
Pruritis
Allergies
↑Appetite in children
26
28. Methysergide
•
•
•
•
•
Chemically related to ergot alkaloids
Potent 5HT2A/2C antagonist
Acts on 5HT1 receptors also
Has agonist activity in some tissues
Useful in
Migraine prophylaxis
Carcinoid tumor
Post-gastrectomy dumping syndrome
Prolonged use endocardial, pulmonary
fibrosis
28
29. Ergotamine
• 5HT1 and 5HT2 antagonist
• α-adrenergic antagonist
• Partial agonist activity at both types of
receptors
• Useful in acute migraine attack
• Has emetic and oxytocic action as well
29
30.
31. Migraine
• Clinical Presentations:
– Often accompanied by brief aura (visual scotomas,
hemianopia)
– Severe, throbbing, usually unilateral headache (few
hours to a few days in duration)
• Migraine Pathophysiology:
– Vasomotor mechanism -- inferred from:
• increased temporal artery pulsation magnitude
• pain relief (by ergotamine) occurs with decreased
artery pulsations
– Migraine attack associated with (based on histological
studies):
• sterile neurogenic perivascular edema
• inflammation (clinically effective antimigraine
medication reduce perivascular inflammation)
32. Migraine: Drug Treatment
– Ergotamine: best results when drug administered prior to the
attack (prodromal phase) -- less effective as attack progresses
• combined with caffeine: better absorption
• potentially severe long-lasting Vasoconstriction.
– Dihydroergotamine (IV administration mainly): may be
appropriate for intractable migraine
Nonsteroidal antiinflammatory drugs (NSAIDs)
– Sumatriptan: alternative to ergotamine for acute migraine
–
treatment; not recommended for patients with coronary vascular
disease risk.
• formulations: subcutaneous injection, oral, nasal spray
• selective serotonin-receptor agonist (short duration of action)
• probably more effective than ergotamine for management of acute
migraine attacks (relief: 10 to 15 minutes following nasal spray)
33. Migraine: Prophylaxis
– Methysergide
–
–
• effective in about 60% of patients
• NOT effective in treating an active migraine attack or
even preventing an impending attack.
• Methysergide toxicity: retroperitoneal fibroplasia,
subendocardial fibrosis. Recommend 3-4 week drug
holiday every six months
Propranolol - Most common for continuous
prophylaxis
• best established drug for migraine attack prevention.
Amitriptyline (TCA)
• most frequently used among the tricyclic antidepressants
– Valproic acid (Antiepileptic)
• effective in decreasing migraine frequency.
– Nonsteroidal antiinflammatory drugs (NSAIDs)
• used for attack prevention and aborting acute attack
35. Serotonin in Migraine
•
•
1.
2.
3.
4.
5.
Neurogenic vs. Vascular theories
Several drugs that modulate the
serotonin system are effective in
migraine:
Cyproheptadine/methysergide prophylaxis
Sumatriptan, ergotamine - acute
MAO inhibitors and TCA – both
Caffeine (↑ cAMP?)
Reserpine worsens migraine
Editor's Notes
Is a hormone produced by the p. gland in darkness but not in bright light
It is a derivative of 5ht with which it works to regulate sleep cycle ,used insomnia in shift workers & elderly
G-pr 5HT1 linked to AC their act ↓camp,5HT2 linked to IP3&DAG production instead of camp,5HT3 directly without inv of 2nd mesngr,5HT4 stimu AC ↑Camp forman
Triphasic response seen on I.V inj 5HT in animals
d-lysergic acid diethylamide it has hallucinogenic property,supresses the electrical activity in 5htenergic raphe neurons wch tonically (-) da visual,sensory inputs
- Cisapride ↑GITmotility , used in GERD
Condition of unnown cause in wch da arteries of da fingers r unduly reactive nd enter spasm(angio/vaso) wn da hands r cold.
Any agent that induces or accelerates labour by stimulating the muscles of uterus to contract.