This document discusses androgens, which are steroid hormones that include testosterone and dihydrotestosterone. Androgens are primarily produced in the testes of males by Leydig cells, which synthesize testosterone from cholesterol through various enzymatic pathways. Testosterone is transported bound to albumin or sex hormone binding globulin and is metabolized in the liver before being excreted in urine. Androgens play important physiological roles in male development, libido, and pubertal growth.
As a component of the endocrine system, both male and female gonads produce sex hormones. Male and female sex hormones are steroid hormones and as such, can pass through the cell membrane of their target cells to influence gene expression within cells. Gonadal hormone production is regulated by hormones secreted by the anterior pituitary in the brain. Hormones that stimulate the gonads to produce sex hormones are known as gonadotropins. The pituitary secretes the gonadotropins luteinizing hormone (LH) and follicle-stimulating hormone (FSH). These protein hormones influence reproductive organs in various ways. LH stimulates the testes to secrete the sex hormone testosterone and the ovaries to secrete progesterone and estrogens. FSH aids in the maturation of ovarian follicles (sacs containing ova) in females and sperm production in males.
Steroid hormones can be grouped into 2 classes, corticosteroids (typically made in the adrenal cortex, hence cortico-) and sex steroids (typically made in the gonads or placenta).
As a component of the endocrine system, both male and female gonads produce sex hormones. Male and female sex hormones are steroid hormones and as such, can pass through the cell membrane of their target cells to influence gene expression within cells. Gonadal hormone production is regulated by hormones secreted by the anterior pituitary in the brain. Hormones that stimulate the gonads to produce sex hormones are known as gonadotropins. The pituitary secretes the gonadotropins luteinizing hormone (LH) and follicle-stimulating hormone (FSH). These protein hormones influence reproductive organs in various ways. LH stimulates the testes to secrete the sex hormone testosterone and the ovaries to secrete progesterone and estrogens. FSH aids in the maturation of ovarian follicles (sacs containing ova) in females and sperm production in males.
Steroid hormones can be grouped into 2 classes, corticosteroids (typically made in the adrenal cortex, hence cortico-) and sex steroids (typically made in the gonads or placenta).
sex-hormones belong to the steroid class of compounds and are produced in the gonads, i.e., testes in the male and ovaries in the female. In fact, their activity seems to be controlled and monitored by the hormones that are produced in the interior.
Steroid Hormones - Dr. P. Saranraj, Assistant Professor, Department of Microbiology, Sacred Heart College (Autonomous), Tirupattur, Vellore District, Tamil Nadu, India.
Points:
Male Sex Hormone - Androgens (Mainly Testosterone)
Synthesis, Regulation & metabolism (By both Hypothalamus & Pituitory gland)
Various Action/ Physiological roles over:
1. Sex organs and secondary sex characters (Androgenic)
2. Testes
3. Skeleton and skeletal muscles (Anabolic)
4. Erythropoiesis
Anabolic Steroids & their uses
Antiandrogens (Classification, MOA & Uses)
Drugs for erectile dysfunction (MOA & Uses)
Main Male Sex Hormone is Testosterone which converts into its highly active form i.e. dihydrotestosteron (DHT).
Main Female Sex Hormones are Estrogen & Progesterone.
sex-hormones belong to the steroid class of compounds and are produced in the gonads, i.e., testes in the male and ovaries in the female. In fact, their activity seems to be controlled and monitored by the hormones that are produced in the interior.
Steroid Hormones - Dr. P. Saranraj, Assistant Professor, Department of Microbiology, Sacred Heart College (Autonomous), Tirupattur, Vellore District, Tamil Nadu, India.
Points:
Male Sex Hormone - Androgens (Mainly Testosterone)
Synthesis, Regulation & metabolism (By both Hypothalamus & Pituitory gland)
Various Action/ Physiological roles over:
1. Sex organs and secondary sex characters (Androgenic)
2. Testes
3. Skeleton and skeletal muscles (Anabolic)
4. Erythropoiesis
Anabolic Steroids & their uses
Antiandrogens (Classification, MOA & Uses)
Drugs for erectile dysfunction (MOA & Uses)
Main Male Sex Hormone is Testosterone which converts into its highly active form i.e. dihydrotestosteron (DHT).
Main Female Sex Hormones are Estrogen & Progesterone.
Medicinal Chemistry of Steroidal Harmons
Classification of Steroidal Harmons
Medicinal Uses
Biosynthesis of Steroidal Harmons
Mechanism of action of Steroidal Harmons
Natural and Synthetic derivatives of Steroidal Harmons and their Inhibitors
steroids, definition, classification, sterol, bile acids, cardiac glycosides, steroid hormones, classes of steroid hormones, identity tests for sterols, identity tests for cholesterol, identity tests for bile acids, identity tests for cardiac glycosides
In This Presentation i have added all the content of biology chapter
Chemical Coordination and integration from Class 11 NCERT Biology....
Hope this will help you ...
Thyroid and Adrenal Gland Function Determine many aspects of health, wellness and overall energy. If there is a miscommunication between these and other glands, it can lead to interferences in health, such as weight gain, infertility, digestive disorders and mood disorders. The Natural Nurse, Ellen Kamhi, PhD RN explains the basic function and feedback mechanisms involved in gland communication, along with Natural Remedy Support.
Essential Drugs Dosage and Formulations (Medical Booklet Series by Dr. Aryan ...Dr. Aryan (Anish Dhakal)
This is the 22nd part of medical booklet series created by Dr. Aryan in order to familiarize doctors and medical students about the basic doses of drugs. Many students remember the mechanism of actions and other details of drug very well and regard doses as unnecessary. While you prescribe, this becomes one of the most important aspect. This study material is focused to resolve such issues.
Osteoarthritis is a chronic degenerative disorder of synovial joints in which there is progressive softening and erosion/disintegration of the articular cartilage. In the presentation, I will deal in detail about the condition in every dimension with the most recent evidence.
Preterm labor is the labor that starts before the 37th completed week. In this presentation, we will discover causes, pathogenesis, diagnosis, clinical features, and management principles for preterm labor along with the most recent evidence.
Delirium, also referred to as "acute confusional state" or "acute brain syndrome," is a condition of severe confusion and rapid changes in brain function.
Skin warts are benign tumours caused by infection of keratinocytes with HPV, visible as well‐defined hyperkeratotic protrusions. We will explore the detailed types, presentation, and treatment modalities of most common warts.
Journal Club: Prophylactic Thyroidectomy in Multiple Endocrine Neoplasia 2 Dr. Aryan (Anish Dhakal)
The study aims to analyze the long-term results of a large cohort of MEN2 patients with the C634Y mutation who had undergone prophylactic thyroidectomy in a tertiary referral hospital, and to analyze the results in terms of age and calcitonin levels.
Surgery Review Booklet by Dr. Aryan (Medical Booklet Series by Dr. Aryan Part...Dr. Aryan (Anish Dhakal)
This is a part of free booklet series designed by Dr. Aryan for rapid review of basic concepts of medical science. I grant you right to share the booklet for fair use (teaching, scholarship, education and research) anywhere in the world exclusively for non-monetary purposes.
Pediatrics Review Booklet by Dr. Aryan (Medical Booklet Series by Dr. Aryan P...Dr. Aryan (Anish Dhakal)
This is a part of free booklet series designed by Dr. Aryan for rapid review of basic concepts of medical science. I grant you right to share the booklet for fair use (teaching, scholarship, education and research) anywhere in the world exclusively for non-monetary purposes.
Medicine Review Booklet by Dr. Aryan (Medical Booklet Series by Dr. Aryan Par...Dr. Aryan (Anish Dhakal)
This is a part of free booklet series designed by Dr. Aryan for rapid review of basic concepts of medical science. I grant you right to share the booklet for fair use (teaching, scholarship, education and research) anywhere in the world exclusively for non-monetary purposes.
Gynaecology and Obstetrics Review Booklet by Dr. Aryan (Medical Booklet Serie...Dr. Aryan (Anish Dhakal)
This is a part of free booklet series designed by Dr. Aryan for rapid review of basic concepts of medical science. I grant you right to share the booklet for fair use (teaching, scholarship, education and research) anywhere in the world exclusively for non-monetary purposes.
Radiology Review Booklet by Dr. Aryan (Medical Booklet Series by Dr. Aryan Pa...Dr. Aryan (Anish Dhakal)
This is a part of free booklet series designed by Dr. Aryan for rapid review of basic concepts of medical science. I grant you right to share the booklet for fair use (teaching, scholarship, education and research) anywhere in the world exclusively for non-monetary purposes.
Ophthalmology Review Booklet by Dr. Aryan (Medical Booklet Series by Dr. Arya...Dr. Aryan (Anish Dhakal)
This is a part of free booklet series designed by Dr. Aryan for rapid review of basic concepts of medical science. I grant you right to share the booklet for fair use (teaching, scholarship, education and research) anywhere in the world exclusively for non-monetary purposes.
Forensic Review Booklet by Dr. Aryan (Medical Booklet Series by Dr. Aryan Par...Dr. Aryan (Anish Dhakal)
This is a part of free booklet series designed by Dr. Aryan for rapid review of basic concepts of medical science. I grant you right to share the booklet for fair use (teaching, scholarship, education and research) anywhere in the world exclusively for non-monetary purposes.
ENT Review Booklet by Dr. Aryan (Medical Booklet Series by Dr. Aryan Part 12)Dr. Aryan (Anish Dhakal)
This is a part of free booklet series designed by Dr. Aryan for rapid review of basic concepts of medical science. I grant you right to share the booklet for fair use (teaching, scholarship, education and research) anywhere in the world exclusively for non-monetary purposes.
Dentistry Review Booklet by Dr. Aryan (Medical Booklet Series by Dr. Aryan Pa...Dr. Aryan (Anish Dhakal)
This is a part of free booklet series designed by Dr. Aryan for rapid review of basic concepts of medical science. I grant you right to share the booklet for fair use (teaching, scholarship, education and research) anywhere in the world exclusively for non-monetary purposes.
Dermatology Review Booklet by Dr. Aryan (Medical Booklet Series by Dr. Aryan ...Dr. Aryan (Anish Dhakal)
This is a part of free booklet series designed by Dr. Aryan for rapid review of basic concepts of medical science. I grant you right to share the booklet for fair use (teaching, scholarship, education and research) anywhere in the world exclusively for non-monetary purposes.
Anaesthesia Review Booklet by Dr. Aryan (Medical Booklet Series by Dr. Aryan ...Dr. Aryan (Anish Dhakal)
This is a part of free booklet series designed by Dr. Aryan for rapid review of basic concepts of medical science. I grant you right to share the booklet for fair use (teaching, scholarship, education and research) anywhere in the world exclusively for non-monetary purposes.
Management of hypertensive condition in 2020 according to AHA/ASA guidelines. We will discuss the presentation, clinical assessment, investigations, and management of hypertension along with major randomized controlled trials and guidelines.
Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
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.
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
Dr Sujoy Dasgupta presented the study on "Couples presenting to the infertility clinic- Do they really have infertility? – The unexplored stories of non-consummation" in the 13th Congress of the Asia Pacific Initiative on Reproduction (ASPIRE 2024) at Manila on 24 May, 2024.
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.
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.
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
ASA GUIDELINE
NYSORA Guideline
2 Case Reports of Gastric Ultrasound
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Recomendações da OMS sobre cuidados maternos e neonatais para uma experiência pós-natal positiva.
Em consonância com os ODS – Objetivos do Desenvolvimento Sustentável e a Estratégia Global para a Saúde das Mulheres, Crianças e Adolescentes, e aplicando uma abordagem baseada nos direitos humanos, os esforços de cuidados pós-natais devem expandir-se para além da cobertura e da simples sobrevivência, de modo a incluir cuidados de qualidade.
Estas diretrizes visam melhorar a qualidade dos cuidados pós-natais essenciais e de rotina prestados às mulheres e aos recém-nascidos, com o objetivo final de melhorar a saúde e o bem-estar materno e neonatal.
Uma “experiência pós-natal positiva” é um resultado importante para todas as mulheres que dão à luz e para os seus recém-nascidos, estabelecendo as bases para a melhoria da saúde e do bem-estar a curto e longo prazo. Uma experiência pós-natal positiva é definida como aquela em que as mulheres, pessoas que gestam, os recém-nascidos, os casais, os pais, os cuidadores e as famílias recebem informação consistente, garantia e apoio de profissionais de saúde motivados; e onde um sistema de saúde flexível e com recursos reconheça as necessidades das mulheres e dos bebês e respeite o seu contexto cultural.
Estas diretrizes consolidadas apresentam algumas recomendações novas e já bem fundamentadas sobre cuidados pós-natais de rotina para mulheres e neonatos que recebem cuidados no pós-parto em unidades de saúde ou na comunidade, independentemente dos recursos disponíveis.
É fornecido um conjunto abrangente de recomendações para cuidados durante o período puerperal, com ênfase nos cuidados essenciais que todas as mulheres e recém-nascidos devem receber, e com a devida atenção à qualidade dos cuidados; isto é, a entrega e a experiência do cuidado recebido. Estas diretrizes atualizam e ampliam as recomendações da OMS de 2014 sobre cuidados pós-natais da mãe e do recém-nascido e complementam as atuais diretrizes da OMS sobre a gestão de complicações pós-natais.
O estabelecimento da amamentação e o manejo das principais intercorrências é contemplada.
Recomendamos muito.
Vamos discutir essas recomendações no nosso curso de pós-graduação em Aleitamento no Instituto Ciclos.
Esta publicação só está disponível em inglês até o momento.
Prof. Marcus Renato de Carvalho
www.agostodourado.com
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
(DSM-5) integrates alcohol abuse and alcohol dependence into a single
disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
In the DSM-5, all types of substance abuse and dependence have been
combined into a single substance use disorder (SUD) on a continuum
from mild to severe. A diagnosis of AUD requires that at least two of
the 11 DSM-5 behaviors be present within a 12-month period (mild
AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
drinking, negative social consequences, risky use, and altered physiological
effects (tolerance, withdrawal). This chapter presents an overview
of the prevalence and harmful consequences of AUD in the U.S.,
the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
pharmacotherapies for AUD.
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.
2. • Androgen is a steroid hormone.
• Types :
• 1. Testosterone
• 2. Dihydrotestosterone
• 3. Androstenedione
• 5-12 mg of testosterone produced daily by testes
• converted to more active form dihydrotestosterone in extra glandular tissues.
• 19 carbon compounds
4. ANDROGENS
Sites of synthesis in males -- primarily testes-leydig cells; also in adrenals (zona
reticularis and fasciculata)
Androgens in Females
Sites of synthesis-ovaries; tiny amount by theca cells of ovarian follicles,
adrenals, placenta
Physiological significance
• Apparently not necessary for normal menstrual cycling, but may be involved in
pubertal growth spurt, libido.
• Precursor of hormone is cholesterol.
5. TESTOSTERONE: LEYDIG CELLS
• Cholesterol can either be synthesized de novo in the Leydig cell
• can also be LDL derived
• Migrate to inner mitochondria by stAR (steroidogenic Acute Regulatory) protein
• first converted to Pregnenolone by Cyt P450 side chain cleavage
enzyme (P450SCC) which then forms androstenedione by two
pathways:
1. Through progesterone (Progesterone (or ∆4) pathway)
2. Through 17-hydroxypregnenolone. (Dehydroepiandrosterone or
∆5 pathway)
6.
7. TESTESTERONE TRANSPORT
• largely bound to albumin and to a specific transport protein, Testosterone
estrogen binding protein (TEBG) or sex hormone-binding globulin (SHBG)
• Currently, protein bound testosterone is also regarded as biologically active
• Liver mainly metabolizes androgens to 17-ketosteroids,which are excreted in urine