Peptide Hormone Secreting Tumors (Hormone Research)

by X. Bertagna

Publisher: S. Karger AG (Switzerland)

Written in English
Published: Pages: 166 Downloads: 242
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  • Oncology,
  • Medical / Nursing
The Physical Object
Number of Pages166
ID Numbers
Open LibraryOL12930036M
ISBN 103805551673
ISBN 109783805551670

The peptide hormones include molecules that are short polypeptide chains, such as antidiuretic hormone and oxytocin produced in the brain and released into the blood in the posterior pituitary gland. This class also includes small proteins, such as growth hormones produced by the pituitary, and large glycoproteins, such as follicle-stimulating.   The aim of this study was to characterize patients with pure androgen-secreting adrenal tumors. Methods. A retrospective chart review from January through November identified 11 female patients with pure androgen-secreting adrenal tumors. Results. The Cited by: New research suggests pretreating cells with a peptide hormone may improve the success rate of pancreatic islet cell transplants, a procedure that holds great promise for curing Type 1 diabetes. Octreotide is a synthetic long-acting cyclic octapeptide with pharmacologic properties mimicking those of the natural hormone somatostatin. Octreotide is a more potent inhibitor of growth hormone, glucagon, and insulin than r to somatostatin, this agent also suppresses the luteinizing hormone response to gonadotropin-releasing hormone, decreases splanchnic blood flow, and.

Long-term treatment of severe diarrhea and flushing due to metastatic carcinoid tumors; and profuse watery diarrhea due to vasoactive intestinal peptide-secreting tumors in patients whom immediate.   The preoperative differential diagnosis of NFPAs includes, in addition to silent pituitary adenomas, primary non–hormone-secreting lesions such as craniopharyngioma, sellar paraganglioma, sellar neuroblastoma, sellar neurocytoma, metastasis from low-grade neuroendocrine tumor, lymphoma, and primary tumors of the pituitary stalk. The Cited by: Pituitary apoplexy is a rare clinical emergency due to acute ischemic infarction or hemorrhage of the pituitary gland. As this disorder most often involves a pituitary adenoma, especially nonfunctioning tumors, the syndrome should be referred to as pituitary tumor apoplexy. The precise physiopathology is not completely clear. Although in most cases it occurs spontaneously, pituitary apoplexy. After several years of Research & Development, Lifetech Labs is launching a unique product concept: a new innovative range of 7 products that combines both Biology ch Labs is proud to introduce its new brand: biosynergy®. Developed in a scientific Hi-Tech environment, biosynergy® products combined with adapted nutrition and training will provide optimum results.

Somatostatin, a tetradecapeptide that inhibits peptide hormone release in various sites such as the pituitary, the pancreas, and the gastrointestinal tract, has been shown recently to have beneficial effects when given chronically in the form of a stable non-degradable octapeptide analogue (SMS ) in such gastrointestinal endocrine tumors. One of the curious things about Neuroendocrine Cancer (NETs elsewhere in the text) is that it can very often exhibit one or more vague symptoms collectively known as a ‘syndrome’.. Syndrome is an apt word to describe these complications as the most general meaning in medical terms is a group of symptoms that together are characteristic of a specific disorder or disease”. Peptide hormones act as ligands for a wide range of G protein-coupled receptors. Peptide hormones are secreted and function in an endocrine manner to regulate many physiological functions, including growth, appetite and energy metabolism, cardiac function, stress, and reproductive physiology. Insulin: Pancreatic Peptide Hormone -2 This is the continuous part of “ Peptide hormone: Pancreatic secretions-1 “. This chapter explains the second pancreatic hormone Insulin structure, biosynthesis, mechanism and Functions.

Peptide Hormone Secreting Tumors (Hormone Research) by X. Bertagna Download PDF EPUB FB2

Munson PL, Tashjian AH, Jr, Levine L. Evidence for parathyroid hormone in nonparathyroid tumors associated with hypercalcemia. Cancer Res. Aug; 25 (7)– Zollinger RM, Tompkins RK, Amerson JR, Endahl GL, Kraft AR, Moore FT. Identification of the diarrheogenic hormone associated with non-beta islet cell tumors of the by: Peptide Hormone Secreting Tumors: 32nd International Henri-Pierre Klotz Days of Clinical Endocrinology, Paris, May (Hormone Research): Medicine & Health Science Books @.

This discussion will focus on hormone-secreting tumors and their clinical presentations. For practical purposes, every hormone known to be physiologically secreted has been associated with ectopic tumor secretion. Peptide hormones are the most frequently produced ectopic by: 7. Most peptide hormone genes are single copy and produce mature hormones that are monomeric.

However, differential processing can yield multiple bioactive Peptide Hormone Secreting Tumors book for some peptide hormones with the most extreme example in mosquitoes being prepro-FMRFamide, which is processed into nine functional FMRFamide isoforms (Predel et al., ).Some peptide hormone genes along with their receptors.

Studies of thyroid hormone action revealed no evidence of acquired resistance to thyroid hormone in TSH-secreting tumors. Apparent cure was achieved in 35% of cases by surgery alone and in 22%. This chapter examines tumors arising from peptide-secreting cells, including pancreatic islets and ducts.

It has been observed that the gut contains, in aggregate, the largest number of peptide-secreting endocrine cells in the body, dispersed throughout the mucosa, and in addition, has a rich intrinsic and extrinsic peptidergic : L.

Otto Uttenthal. And that action, by and large, for somatostatin (the grand controller of all of these peptides) is not to affect a steroid-based hormone like estrogen or testosterone, not ones like thyroid hormone, but to affect a peptide hormone like gastrin, insulin, or glucagon.

The one single action is to regulate those cells so they don’t go out of control. Chapter 18 Growth Hormone–Secreting Tumors Carrie R. Muh, Adriana G. Ioachimescu, Nelson M. Oyesiku Hypersecretion of growth hormone (GH) from a functioning pituitary tumor before the closure of the epiphyseal plates of long Peptide Hormone Secreting Tumors book results in gigantism, while hypersecretion after closure leads to.

In that paper the author noted that such an uptake was also found in other peptide hormone-secreting cells, for example in the corticotrophs of the anterior pituitary gland and in the β-cells of the endocrine pancreas.

However, these clear-cut observations became hidden beneath the much larger edifice that the APUD concept became, with APUD Cited by: 9. Acromegaly is a disorder that results from excess growth hormone (GH) after the growth plates have closed.

The initial symptom is typically enlargement of the hands and feet. There may also be enlargement of the forehead, jaw, and nose. Other symptoms may include joint pain, thicker skin, deepening of the voice, headaches, and problems with vision. Complications: Type 2 diabetes, sleep apnea.

Peptide hormones or protein hormones are hormones whose molecules are peptides or proteins, latter have longer amino acid chain lengths than the former. These hormones have an effect on the endocrine system of animals, including humans.

Most hormones can be classified as either amino acid–based hormones (amine, peptide, or protein) or steroid hormones. Ver esta página en español. Pancreatic neuroendocrine tumors (pancreatic NETs or PNETs), also called pancreatic endocrine tumors or islet cell tumors, are tumors that form from the abnormal growth of hormone-producing cells in the pancreas called islet cells.

Vasoactive intestinal polypeptide secreting tumors (VIPomas) are very rare pancreatic neuroendocrine tumors (PNETs) associated with profuse diarrhea. They are usually single tumors and metastatic at diagnosis. Generally, laboratory testing includes an electrolyte. Non-Functioning Tumors (Endocrine-Inactive Tumors) As their name indicates, these relatively common pituitary adenomas do not result in excess hormone production.

Instead they typically cause symptoms because of increasing size and pressure effect on the normal pituitary gland and on structures near the pituitary such as the optic nerves and. A retrospective review of the pituitary adenoma literature indicates that prolactinomas are by far the most common form of pituitary adenoma as determined by immunohistochemical criteria; tumors secreting adrenocorticotropic hormone (ACTH), growth hormone (GH), luteinizing hormone (LH), and thyroid-stimulating hormone (TSH) follow in decreasing.

These kinds are called hormone-sensitive or hormone-dependent. When a tumor is hormone-sensitive, its cells have proteins on their surfaces called receptors. They link to hormones like a lock and key.

Brazeau P, Vale W, Burgus R, et al. Hypothalamic polypeptide that inhibits the secretion of immunoreactive pituitary growth hormone.

Science ;– PubMed Google Scholar. Pages in category "Peptide hormone secreting cells" The following 12 pages are in this category, out of 12 total. This list may not reflect recent changes (). pre-pro-insulin: signal peptide, insulin, c peptide the signal peptide sends it to the ER and then is cleaved pro-insulin: C peptide and insulin processed in the ER, separated at dibasic conversion sites insulin and c peptide are secreted.

Out of four peptides drugs in the market that have reached global sales over $1 billion, three peptides are used in treating cancer directly or in the treatment of episodes associated with certain tumors (leuprolide, goserelin, and octreotide).The number of peptide drugs entering clinical trials is increasing steadily; it was per year in.

Examples of peptide hormones include antidiuretic hormone (ADH), a pituitary hormone important in fluid balance, and atrial-natriuretic peptide, which is produced by the heart and helps to decrease blood pressure.

Some examples of protein hormones include growth hormone, which is produced by the pituitary gland, and follicle-stimulating hormone. Pancreatic neuroendocrine tumors (also known as islet cell tumors or islet cell carcinoma) are a type of neuroendocrine tumor found in the pancreas.

Only 5 percent of pancreatic tumors arise in the islet cells. The vast majority of tumors found in the pancreas are adenocarcinoma, which is more commonly referred to as pancreatic cancer.

Some pancreatic neuroendocrine tumors are functional. A peptide hormone, produced by the anterior pituitary, that promotes mammary development for lactation in female mammals () Growth Hormone (Somatotropin Hormone) A tropic hormone, secreted by the anterior pituitary, that influences the growth of cells and tissues.

The peptide hormone prolactin (PRL) is expressed in the pituitary of all mammals, and its major function in females is the stimulation of milk production by the mammary gland. More than 95 percent of all cases of acromegaly are the result of a growth hormone–secreting pituitary adenoma.

Growth hormone–secreting pituitary adenomas begin in the somatotropic cells of the pituitary gland. Also called GH, the growth hormone secreted by these tumors triggers the liver to produce insulin-like growth factor 1, or IGF A recombinant hormone used to induce or strengthen uterine contractions in pregnant women to aid in labor and delivery or to control postpartum bleeding.

Pentagastrin: A gastrin-like molecule used as a diagnostic aid for the evaluation of gastric acid secretory function, gastric hypersecretion, and Zollinger-Ellison tumors. Gonadorelin. Protein and peptide hormone synthesis. Protein and peptide hormone action.

Pituitary Tumors, ACTH-Secreting. Acromegaly, Clinical Features of. Acromegaly, Diagnosis of He is an author of about seven hundred peer-reviewed publications as well as several book chapters on basic and clinical reproductive endocrinology and laboratory. What are androgen-secreting Tumours.

Androgen secreting tumours (AST) are tumours secreting male sex steroids (androgens) that arise in women and are associated with the development of male physical characteristics, a process called virilisation. Such tumours can develop either in the ovary or, more rarely, in the adrenal gland.

The Pituitary, Fourth Edition, continues the tradition of a cogent blend of basic science and clinical medicine which has been the successful hallmark of prior editions. This comprehensive text is devoted to the pathogenesis, diagnosis, and treatment of pituitary disorders.

The new edition has been extensively revised to reflect new knowledge derived from advances in molecular and cell biology. Once a hormone is secreted by an endocrine tissue, it generally binds to a specific plasma protein carrier, with the complex being disseminated to distant tissues.

Plasma carrier proteins exist for all classes of endocrine hormones. Carrier proteins for peptide hormones prevent. Prostaglandin E2 also causes accumulation of water and electrolytes in the lumen of the gut by stimulating their secretion.

Elevated levels of Prostaglandin E2 have been detected in patients with the Watery Diarrhea Syndrome, neural crest tumors, pheochromocytomas, and other amine-peptide-secreting tumors.A subset of pituitary neuroendocrine tumors (PitNETs) have an aggressive behavior, showing resistance to treatment and/or multiple recurrences in spite of the optimal use of standard therapies (surgery, conventional medical treatments, and radiotherapy).

To date, for aggressive PitNETs, temozolomide (TMZ) has been the most used therapeutic option, and has resulted in an improvement in the five Cited by: 4. Types of Peptide Hormones: Oxytocin and Vasopressin The posterior pituitary secretes two hormones, oxytocin and vasopressin (anti-diuretic hormone).

The word oxytocin literally means "quick birth" in Greek, which is an accurate description of the hormone's action.