Progesterone Directions Precautions Frequently
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Actions of Vasoactive Intestinal Peptide on the Rat Adrenal Zona Glomerulosa
51 Actions of vasoactive intestinal peptide on the rat adrenal zona glomerulosa J P Hinson, J R Puddefoot and S Kapas1 Molecular and Cellular Biology Section, Division of Biomedical Sciences, St Bartholomew’s and The Royal London School of Medicine and Dentistry, Queen Mary and Westfield College, Mile End Road, London E1 4NS, UK 1Oral Diseases Research Centre, St Bartholomew’s and The Royal London School of Medicine and Dentistry, 2 Newark Street, London E1 2AT, UK (Requests for offprints should be addressed to J P Hinson) Abstract Previous studies, by this group and others, have shown that The response to VIP in adrenals obtained from rats fed vasoactive intestinal peptide (VIP) stimulates aldosterone a low sodium diet was also investigated. Previous studies secretion, and that the actions of VIP on aldosterone have found that adrenals from animals on a low sodium secretion by the rat adrenal cortex are blocked by â diet exhibit increased responsiveness to VIP. Specific VIP adrenergic antagonists, suggesting that VIP may act by binding sites were identified, although the concentration the local release of catecholamines. The present studies or affinity of binding sites in the low sodium group was not were designed to test this hypothesis further, by measur- significantly different from the controls. In the low sodium ing catecholamine release by adrenal capsular tissue in group VIP was found to increase catecholamine release to response to VIP stimulation. the same extent as in the control group, however, in Using intact capsular tissue it was found that VIP caused contrast to the control group, the adrenal response to VIP a dose-dependent increase in aldosterone secretion, with a was not altered by adrenergic antagonists in the low concomitant increase in both adrenaline and noradrenaline sodium group. -
Affect Breast Cancer Risk
HOW HORMONES AFFECT BREAST CANCER RISK Hormones are chemicals made by the body that control how cells and organs work. Estrogen is a female hormone made mainly in the ovaries. It’s important for sexual development and other body functions. From your first monthly period until menopause, estrogen stimulates normal breast cells. A higher lifetime exposure to estrogen may increase breast cancer risk. For example, your risk increases if you start your period at a young age or go through menopause at a later age. Other hormone-related risks are described below. Menopausal hormone therapy Pills Menopausal hormone therapy (MHT) is The U.S. Food and Drug Administration also known as postmenopausal hormone (FDA) recommends women use the lowest therapy and hormone replacement dose that eases symptoms for the shortest therapy. Many women use MHT pills to time needed. relieve hot flashes and other menopausal Any woman currently taking or thinking symptoms. MHT should be used at the Birth control about taking MHT pills should talk with her lowest dose and for the shortest time pills (oral doctor about the risks and benefits. contraceptives) needed to ease menopausal symptoms. Long-term use can increase breast cancer Vaginal creams, suppositories Current or recent use risk and other serious health conditions. and rings of birth control pills There are 2 main types of MHT pills: slightly increases breast Vaginal forms of MHT do not appear to cancer risk. However, estrogen plus progestin and estrogen increase the risk of breast cancer. However, this risk is quite small alone. if you’ve been diagnosed with breast cancer, vaginal estrogen rings and suppositories are because the risk of Estrogen plus progestin MHT breast cancer for most better than vaginal estrogen creams. -
Salivary 17 Α-Hydroxyprogesterone Enzyme Immunoassay Kit
SALIVARY 17 α-HYDROXYPROGESTERONE ENZYME IMMUNOASSAY KIT For Research Use Only Not for use in Diagnostic Procedures Item No. 1-2602, (Single) 96-Well Kit; 1-2602-5, (5-Pack) 480 Wells Page | 1 TABLE OF CONTENTS Intended Use ................................................................................................. 3 Introduction ................................................................................................... 3 Test Principle ................................................................................................. 4 Safety Precautions ......................................................................................... 4 General Kit Use Advice .................................................................................... 5 Storage ......................................................................................................... 5 pH Indicator .................................................................................................. 5 Specimen Collection ....................................................................................... 6 Sample Handling and Preparation ................................................................... 6 Materials Supplied with Single Kit .................................................................... 7 Materials Needed But Not Supplied .................................................................. 8 Reagent Preparation ....................................................................................... 9 Procedure ................................................................................................... -
HORMONES and SPORT Insulin, Growth Hormone and Sport
13 HORMONES AND SPORT Insulin, growth hormone and sport P H Sonksen Guy’s, King’s and St Thomas’ School of Medicine, St Thomas’ Hospital, London SE1 7EH, UK; Email: [email protected] Abstract This review examines some interesting ‘new’ histories of blood rather than urine samples. The first method has a insulin and reviews our current understanding of its window of opportunity lasting about 24 h after an injec- physiological actions and synergy with GH in the regu- tion and is most suitable for ‘out of competition’ testing. lation of metabolism and body composition. It reviews the The second method has reasonable sensitivity for as long as history of GH abuse that antedates by many years the 2 weeks after the last injection of GH and is uninfluenced awareness of endocrinologists to its potent anabolic actions. by extreme exercise and suitable for post-competition Promising methods for detection of GH abuse have been samples. This method has a greater sensitivity in men than developed but have yet to be sufficiently well validated to in women. The specificity of both methods seems accept- be ready for introduction into competitive sport. So far, ably high but lawyers need to decide what level of there are two promising avenues for detecting GH abuse. scientific probability is needed to obtain a conviction. Both The first uses immunoassays that can distinguish the methods need further validation before implementation. isomers of pituitary-derived GH from the monomer of Research work carried out as part of the fight against recombinant human GH. The second works through doping in sport has opened up a new and exciting area of demonstrating circulating concentrations of one or more endocrinology. -
Thyroid Hormones in Fetal Growth and Prepartum Maturation
A J FORHEAD and A L FOWDEN Thyroid hormones and fetal 221:3 R87–R103 Review development Thyroid hormones in fetal growth and prepartum maturation A J Forhead1,2 and A L Fowden1 Correspondence should be addressed 1Department of Physiology, Development and Neuroscience, University of Cambridge, Physiology Building, to A L Fowden Downing Street, Cambridge CB2 3EG, UK Email 2Department of Biological and Medical Sciences, Oxford Brookes University, Oxford OX3 0BP, UK [email protected] Abstract The thyroid hormones, thyroxine (T4) and triiodothyronine (T3), are essential for normal Key Words growth and development of the fetus. Their bioavailability in utero depends on " thyroid hormones development of the fetal hypothalamic–pituitary–thyroid gland axis and the abundance " intrauterine growth of thyroid hormone transporters and deiodinases that influence tissue levels of bioactive " maturation hormone. Fetal T4 and T3 concentrations are also affected by gestational age, nutritional and " neonatal adaptation endocrine conditions in utero, and placental permeability to maternal thyroid hormones, which varies among species with placental morphology. Thyroid hormones are required for the general accretion of fetal mass and to trigger discrete developmental events in the fetal brain and somatic tissues from early in gestation. They also promote terminal differentiation of fetal tissues closer to term and are important in mediating the prepartum maturational effects of the glucocorticoids that ensure neonatal viability. Thyroid hormones act directly through anabolic effects on fetal metabolism and the stimulation of fetal oxygen Journal of Endocrinology consumption. They also act indirectly by controlling the bioavailability and effectiveness of other hormones and growth factors that influence fetal development such as the catecholamines and insulin-like growth factors (IGFs). -
Recent Advances in Vasoactive Intestinal Peptide Physiology And
F1000Research 2019, 8(F1000 Faculty Rev):1629 Last updated: 28 NOV 2019 REVIEW Recent advances in vasoactive intestinal peptide physiology and pathophysiology: focus on the gastrointestinal system [version 1; peer review: 4 approved] Mari Iwasaki1, Yasutada Akiba 1,2, Jonathan D Kaunitz 1,3 1Greater Los Angeles Veterans Affairs Healthcare System, Los Angeles, CA, USA 2Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA 3Departments of Medicine and Surgery, UCLA School of Medicine, Los Angeles, CA, USA First published: 12 Sep 2019, 8(F1000 Faculty Rev):1629 ( Open Peer Review v1 https://doi.org/10.12688/f1000research.18039.1) Latest published: 12 Sep 2019, 8(F1000 Faculty Rev):1629 ( https://doi.org/10.12688/f1000research.18039.1) Reviewer Status Abstract Invited Reviewers Vasoactive intestinal peptide (VIP), a gut peptide hormone originally 1 2 3 4 reported as a vasodilator in 1970, has multiple physiological and pathological effects on development, growth, and the control of neuronal, version 1 epithelial, and endocrine cell functions that in turn regulate ion secretion, published nutrient absorption, gut motility, glycemic control, carcinogenesis, immune 12 Sep 2019 responses, and circadian rhythms. Genetic ablation of this peptide and its receptors in mice also provides new insights into the contribution of VIP towards physiological signaling and the pathogenesis of related diseases. F1000 Faculty Reviews are written by members of Here, we discuss the impact of VIP on gastrointestinal function and the prestigious F1000 Faculty. They are diseases based on recent findings, also providing insight into its possible commissioned and are peer reviewed before therapeutic application to diabetes, autoimmune diseases and cancer. -
Diabetes Is a Disease in Which the Body's Ability to Produce Or Respond
Early Signs and Symptoms of diabetes: Early symptoms of diabetes, especially type 2 diabetes, can be subtle or seemingly harmless. Over time, however, you may Diabetes is a disease in which the develop diabetes complications, even if you body’s ability to produce or respond to haven't had diabetes symptoms. In the the hormone insulin is impaired, United States alone, more than 8 million resulting in abnormal metabolism of people have undiagnosed diabetes, Treatments: carbohydrates and elevated levels of according to the American Diabetes Association. Understanding possible glucose (sugar) in the blood. • Insulin therapy diabetes symptoms can lead to early • Oral medications diagnosis and treatment and a lifetime of Diabetes can be broken down into • better health. If you're experiencing any of Diet changes two types, Type 1 and Type 2. Type 1 • Exercise diabetes involves the the following diabetes signs and symptoms, see your doctor. body attacking itself by The medications you take vary by mistake, this then the type of diabetes and how well the causes the body to stop making insulin. With medicine controls you blood glucose levels. Type 2 diabetes the Type 1 diabetics must have insulin. Type 2 body does not respond may or may not include insulin and may just like it should to the be controlled with diet and exercise alone. insulin the pancreas is If you notice any of these changes notify making. Your body tells the pancreas that it needs to make more insulin since the your health care provider. The earlier • insulin that is already there is not working. -
Cortisol Deficiency and Steroid Replacement Therapy
Great Ormond Street Hospital for Children NHS Foundation Trust: Information for Families Cortisol deficiency and steroid replacement therapy This leaflet explains about cortisol deficiency and how it is treated. It also contains information about how to deal with illnesses, accidents and other stressful events in children on cortisol replacement. Where are the The two most important ones are: adrenal glands and • Aldosterone – this helps regulate what do they do? the blood pressure by controlling how much salt is retained in the The adrenal glands rest on the tops body. If a person is unable to of the kidneys. They are part of the make aldosterone themselves, they endocrine system, which organises the will need to take a tablet called release of hormones within the body. ‘fludrocortisone’. Hormones are chemical messengers that switch on and off processes within the • Cortisol – this is the body’s natural body. steroid and has three main functions: The adrenal glands consist of two parts: - helping to control the blood the medulla (inner section) which sugar level makes the hormone ‘adrenaline’ which is part of the ‘fight or flight’ - helping the body deal with stress response a person has when stressed. - helping to control blood pressure the cortex (outer section) which and blood circulation. releases several hormones. If a person is unable to make cortisol themselves, they will need to take a tablet to replace it. Pituitary gland The most common form used is hydrocortisone, but other forms Parathyroid gland may be prescribed. Thyroid gland Medulla Cortex Adrenal Thymus gland Gland Kidney Adrenal gland Pancreas Sheet 1 of 7 Ref: 2014F0715 © GOSH NHS Foundation Trust March 2015 What is In these circumstances, the amount cortisol deficiency? of hydrocortisone given needs to be increased quickly. -
PROGESTERONE? PO Box12004 Like Estrogen, Which Gets Much More Public Attention, Progesterone Is a Female Sex Hormone
FOLD FOLD FOLD DO NOT PRINT DO NOT PRINT DO NOT PRINT Overland Park,KS66282 WHAT IS PROGESTERONE? PO Box12004 Like estrogen, which gets much more public attention, progesterone is a female sex hormone. Women produce it in the ovaries and adrenal glands, and during pregnancy in the placenta. With all the talk about estrogen, progesterone is sometimes left behind as the forgotten female hormone. UNDERSTANDING WHAT ARE HORMONES AND HOW DO THEY WORK? IS PROGESTIN THE SAME THING AS PROGESTERONE? Hormones are our bodies’ chemical messengers. PROGESTERONE They travel through the bloodstream to trigger certain No. Although these terms are often used interchangeably, activities or changes in the body. Hormones work by they do not mean the same thing. Progesterone refers binding to specialized areas of cells known as receptor to the hormone produced in the body, or produced sites. There they initiate a chain of events in specific from a plant source but still chemically identical to cells or organs. For example, progesterone has been human progesterone. In contrast, progestin is a known to initiate a calming effect in the brain, hormone that is synthetically produced and may differ reducing anxiety. in structure to progesterone. You may also have heard of progestogens. This is a general term that applies WHAT DOES PROGESTERONE DO? to the category of both natural and synthetic hormones that act like progesterone in the uterus. See the During the reproductive years, progesterone prepares difference in the molecular structure depicted below. the uterine lining (or womb) for pregnancy. Each month, progesterone levels rise following ovulation. -
CORTISOL IMBALANCE Patient Handout
COMMON PATTERNS OF CORTISOL IMBALANCE Patient HandOut Cortisol that does not follow the normal pattern can trigger blood sugar imbalances, food cravings and fat storage, especially around the middle. Related imbalances of low DHEA commonly result in loss of lean muscle, lack of strength, decreased stamina and low exercise tolerance. Chronically Elevated Cortisol Overall higher than normal cortisol Lifestyle suggestions: production throughout the day from • Reduce stress and improve coping skills prolonged stress demands. High • Protein at each meal, no skipping lunch cortisol also depletes its precursor hormone progesterone. • Hydrate throughout the day, herbal teas and water, avoid soft drinks General symptoms: • Reduce consumption of refined carbohydrates and caffeine • Food/sugar cravings • Get adequate sleep (at least 7 hours); catnaps • Feeling “tired but wired” • Aerobic exercise: <40 min low – moderate intensity • Insomnia during time when cortisol level within optimal range • Anxiety • Strength training: with guidance 2-3 times per week • Enjoy exercise that decreases excessive stress symptoms Steep Drop in Cortisol • Exercise in the morning Stress/fatigued pattern – morning Lifestyle suggestions: cortisol in the high normal range or • Reduce stress and improve coping skills elevated, but levels drop off rapidly, • Protein at each meal, no skipping lunch indicating adrenal dysfunction. • Hydrate throughout the day, herbal teas General symptoms: and water, avoid soft drinks • Mid-day energy drop • Reduce consumption of refined carbohydrates and caffeine • Drowsiness • Get adequate sleep (at least 7 hours); catnaps • Caffeine/sugar cravings • Exercise mid morning to boost energy with a combination • Low exercise tolerance/ of muscle building and cardiovascular activities poor recovery • Schedule more time for fun activities Rebound Cortisol Up and down/ irregular cortisol, Lifestyle suggestions: not following the normal pattern. -
Sleep Deprivation on the Nighttime and Daytime Profile of Cortisol Levels
Sleep. 20(10):865-870 © 1997 American Sleep Disorders Association and Sleep Research Society Sleep Loss Sleep Loss Results in an Elevation of Cortisol Levels the Next Evening Downloaded from https://academic.oup.com/sleep/article/20/10/865/2725962 by guest on 30 September 2021 *Rachel Leproult, tGeorges Copinschi, *Orfeu Buxton and *Eve Van Cauter *Department of Medicine, University of Chicago, Chicago, Illinois, U.S.A.; and tCenter for the Study of Biological Rhythms and Laboratory of Experimental Medicine, Erasme Hospital, Universite Libre de Bruxelles, Brussels, Belgium Summary: Sleep curtailment constitutes an increasingly common condition in industrialized societies and is thought to affect mood and performance rather than physiological functions. There is no evidence for prolonged or delayed effects of sleep loss on the hypothalamo-pituitary-adrenal (HPA) axis. We evaluated the effects of acute partial or total sleep deprivation on the nighttime and daytime profile of cortisol levels. Plasma cortisol profiles were determined during a 32-hour period (from 1800 hours on day I until 0200 hours on day 3) in normal young men submitted to three different protocols: normal sleep schedule (2300-0700 hours), partial sleep deprivation (0400-0800 hours), and total sleep deprivation. Alterations in cortisol levels could only be demonstrated in the evening following the night of sleep deprivation. After normal sleep, plasma cortisol levels over the 1800-2300- hour period were similar on days I and 2. After partial and total sleep deprivation. plasma cortisol levels over the 1800-2300-hour period were higher on day 2 than on day I (37 and 45% increases, p = 0.03 and 0.003, respec tively), and the onset of the quiescent period of cortisol secretion was delayed by at least I hour. -
Quantification of the Hormones Progesterone and Cortisol in Whale
Quantification of the Hormones Progesterone and Cortisol in Whale Breath Samples Using Novel, Non-Invasive Sampling and Analysis with Highly-Sensitive ACQUITY UPLC and Xevo TQ-S Jody Dunstan,1 Antonietta Gledhill,1 Ailsa Hall,2 Patrick Miller,2 Christian Ramp3 1Waters Corporation, Manchester, UK 2Scottish Oceans Institute, University of St. Andrews, UK 3Mingan Island Cetacean Study, St Lambert, Quebec, Canada APPLICATION BENEFITS INTRODUCTION ■■ Provides a novel, non-invasive sampling method The conservation and management of large whale populations require information to obtain sample from whale blow. These about all aspects of their biology, life history, and behavior. However, it is samples can then be analyzed to determine extremely difficult to determine many of the important life history parameters, the levels of progesterone and cortisol. such as reproductive status, without using lethal or invasive methods. As such, efforts are now focused on obtaining as much information as possible from the ■■ A sensitive, repeatable, quantitative LC-tandem quadrupole MS method is shown. samples collected remotely, with a minimum of disturbance to the whales. Various excreted samples, such as sloughed skin and feces are being used to determine ■■ Parallel acquisition of MRM and full scan sex and maturity, as well as life history stage.1,2 MS data allows both the compounds of interest, and also the matrix background Attention has recently shifted more towards what can be analyzed from samples to be monitored. of whale blow for health assessment3 or steroid hormone analysis.4 Hormone analysis is of particular interest as high levels of progesterone can be used as an ■■ Simultaneous quantitative and investigative indicator of pregnancy status, while other steroids, such as glucocorticoids may be analysis can be performed for different markers of the short-term, acute stress response.