Role of hypothalamic biogenic amines in the release of luteinizing hormone in the ewe

  • 72 Pages
  • 1.46 MB
  • English
Statementby Jonathan Edward Wheaton.
The Physical Object
Pagination[10], 72 leaves, bound :
ID Numbers
Open LibraryOL14242670M

The role of hypothalamic biogenic amines (norepinephrine, dopamine and serotonin) in regulating the release of luteinizing hormone (LH) in the ewe was : Jonathan Edward Wheaton. The role of hypothalamic biogenic amines (norepinephrine, dopamine and serotonin) in regulating the release of luteinizing (LH) in the ewe was investigated.

The possibility that biogenic amines play a physiological role in the spontaneous regulation of luteinizing hormone (LH) release was first indicated by Sawyer, Everett and Markee in They Hypothalamic Biogenic Amines and the Regulation of Luteinizing Hormone Release in the Rat | Cited by: 4.

Graduation date: The role of hypothalamic biogenic amines (norepinephrine,\ud dopamine and serotonin) in regulating the release of luteinizing\ud hormone (LH) in the ewe was investigated.

Aminergic involvement in the control of luteinizing hormone secretion in the domestic fowl. Abstract. Neuropharmacologic agents have been used, in vivo, to investigate the possible involvement of the biogenic amines in the hypothalamic control of luteinizing hormone (LH) secretion in Cited by:   The luteinizing hormone-releasing hormone (LH-RH) content of 16 separate hypothalamic nuclei and of the median eminence have been determined by radioimmunoassay in the rat.

High concentrations of LH-RH were measured in the median eminence and in the arcuate by:   A suitable preparation to study the effect of dopamine (DA) on in. vitro LHRH secretion is presented. Enzymatic degradation of LHRH in the incubation medium is completely inhibited by bacitracin (2 × 10 −5 M).

A high potassium concentration (56mM) induces an increase in LHRH release from entire pieces of mediobasal hypothalamus (MBH), but not from a synaptosomal pellet; this release is Cited by: Prostaglandin F2α and the release of LH in sheep.

The results indicate that small doses of PGF(2α) can trigger LH release from the anterior pituitary of the ewe only during the breeding season. The secretion of epinephrine and norepinephrine from the adrenal medulla is stimulated by A) adrenocorticotropic hormone.

B) increased levels of growth hormone. C) sympathetic nerve innervation. D) increased levels of glucose in body fluids. During early pregnancy in the Mare, this particular placental membrane is present to between Day 30 and 40 of gestation while in the other farm species, this placental membrane has regressed by the third week of pregnancy.

Hypothalamic prolactin stimulates the release of luteinizing hormone-releasing hormone from male rat hypothalamus. Azad N(1), Duffner L, Paloyan EB, Reda D, Kirsteins L, Emanuele NV, Lawrence AM. Author information: (1)Research Service, Veterans Administration Hines Hospital, Illinois Cited by: Agmatine, a novel hypothalamic amine, stimulates pituitary luteinizing hormone release in vivo and hypothalamic luteinizing hormone-releasing hormone release in vitro☆.

Download Role of hypothalamic biogenic amines in the release of luteinizing hormone in the ewe FB2

Abstract. Agmatine, a clonidine displacing substance and imidazoline receptor agonist, was recently isolated from bovine brain and shown to be present in the rat by: Effect of protein deficiency on luteinizing hormone releasing hormone (LHRH), gonadotropin releasing hormone associated peptide (GAP) and luteinizing hormone (LH) immunocytochemistry in the hypothalamus and pituitary gland of prepubertal ewes.

male sheep to seasonally anestrous female sheep activates kisspeptin neurons and other cells in the hypothalamus, leading to increased GnRH/LH secretion. Citation: De Bond J-AP, Li Q, Millar RP, Clarke IJ, Smith JT () Kisspeptin Signaling Is Required for the Luteinizing Hormone Response in Anestrous Ewes following the Introduction of Males.

We have developed an in vitro system for the study of the release of luteinizing hormone-releasing hormone (LH-RH) from its storage granules. In this system, homogenates of hypothalamic tissue are subjected to hypoosmotic shock, and the LH-RH-containing granules.

The Endocrine System is a topic of the event Anatomy and is currently one of the topics for the season, and was previously a topic in The Endocrine System is a series of glands that secrete hormones into the bloodstream.

Any gland that secretes directly into the blood is thereby called an endocrine exocrine gland is one that secretes hormones into a duct. Function Edit. This gene is a member of the glycoprotein hormone beta chain family and encodes the beta subunit of luteinizing hormone (LH).

Glycoprotein hormones are heterodimers consisting of a common alpha subunit and a unique beta subunit (this protein) which confers biological s: LHB, CGB4, LSH-B, hHH23, Luteinizing. Onset of puberty is characterised by a marked increase in the frequency of release of gonadotrophin-releasing hormone (GnRH) and luteinising hormone (LH).

The Kiss1 gene plays a critical role in pubertal development, and its product, kisspeptin, stimulates GnRH and LH by: Abstract.

Description Role of hypothalamic biogenic amines in the release of luteinizing hormone in the ewe FB2

One function of serotonin neurons in brain appears to be control of pituitary hormone secretion. The anterior lobe of the pituitary gland secretes adrenocorticotropic hormone (ACTH), prolactin, growth hormone, thyroid-stimulating hormone (TSH), luteinizing hormone (LH) and follicle-stimulating hormone (FSH); the secretion of these hormones is governed by releasing factors and in Cited by: The role of nutrition and photoperiod in the timing of puberty.

Clare L. Adam (a1) and John J. Robinson (a1) Unexpected inhibitory action of N-methyl-D.L-aspartate on luteinizing hormone release in adult ovariectomized rhesus monkeys: a role of the hypothalamic-adrenial by: Alternative names for luteinising hormone.

Interstitial cell stimulating hormone; luteinizing hormone; lutropin; LH. What is luteinising hormone. Luteinising hormone, like follicle stimulating hormone, is a gonadotrophic hormone produced and released by cells in the anterior pituitary is crucial in regulating the function of the testes in men and ovaries in women.

The Role Of Luteinizing Hormone Biology Essay. Authors: Dr Mamatha Deendayal, Dr Devika Gunasheela, Dr R Gutgutia, Dr Geeta Haripriya, Dr Mirudubhashini, Dr Nayana Patel, Dr Amit Patki, Dr Rahul Chavan*, Dr GAA Ramaraju** * Co-author is employed.

GH-releasing hormone stimulates release of GH. GH-inhibiting hormone suppresses the release of GH. The hypothalamus maintains homeostatic levels of GH. Cells under the action of GH increase in size (hypertrophy) and number (hyperplasia). GH also causes increase in bone length and thickness by deposition of cartilage at the ends of bones.

A biogenic amine is a biogenic substance with one or more amine groups. They are basic nitrogenous compounds formed mainly by decarboxylation of amino acids or by amination and transamination of aldehydes and ic amines are organic bases with low molecular weight and are synthesized by microbial, vegetable and animal metabolisms.

In food and beverages they are formed. biogenic amine that is lipid soluble. T/F - Increasing levels of cortisol inhibit the release of corticotropin-releasing hormone (CRH) the hypothalamic hormone that triggers the release of adrenocorticotropic hormone (ACTH) is.

corticotropin-releasing hormone (CTH) release of hormone in response to changes in level of nutrient or ion. by a loss of follicle-stimulating hormone-releasing hormone activity.

Details Role of hypothalamic biogenic amines in the release of luteinizing hormone in the ewe PDF

These experiments also shed some light on the structure-activity relationship of this hormone. It is now well established that the hypothalamus controls the secretion of luteinizing hormone from the anterior pituitary gland (l-4). Luteinizing hormone-releasing hormone (LHRH) neurons and fibers are located in the anteroventral hypothalamus, specifically in the preoptic medial area and the organum vasculosum of the lamina terminalis.

Most luteinizing hormone-releasing hormone neurons project to the median eminence where they are secreted in the pituitary portal system in order to control the release of by: 4.

Luteinizing hormone-releasing hormone (LHRH), also known as Gonadotropin-Releasing Hormone (GnRH) or Luteinizing Hormone-Releasing Factor (LRF), is a hypothalamic neuropeptide which acts on the pituitary to stimulate the release of luteinizing hormone (LH) and follicle-stimulating hormone (FSH).

Luteinizing Hormone-Releasing Hormone (LHRH) Neuronal System: From Basic to Clinical (), a complex series of mechanisms involving biogenic amines, neuropeptides and circulating sex steroids acting on multiple hypothalamic and perhaps extrahypothalamic nuclei, all participate in the regulation of reproductive function.

It is not the. Structure of Chicken Hypothalamic Luteinizing Hormone-releasing Hormone II. ISOLATION AND CHARACTERIZATION* (Received for publication, Febru ) Judy A.

King and Robert P. Millar From the Department of Chemical Pathology, University of Cape Town Medical School and Groote Schuur Hospital, ObservatoryCape Town, Republic of South. The answer is anterior pituitary gland.

They are the one responsible for secreting the six hormones which are namely the following; prolactin, luteinizing hormone, growth hormone, thyroid stimulating hormone, adrenocorticotropic hormone and follicle stimulating hormone in which are all essential to an individual.Neuroendocrine Control of Luteinizing Hormone Secretion It is well established that LH is released from the anterior pituitary gland in a pulsatile manner (Butler et al., ; Rahe et al., ).

The release of LH is controlled by LHRH, a decapeptide, released into the hypothalamic-hypophysial portal vascularFile Size: 1MB.The Hypothalamo-Pituitary-Gonadal System: Role of Peptides and Sex Steroids.- Involvement of GABA in the Neuroendocrinology of Reproduction.- Section II: Pituitary.- Hypothalamic Biogenic Amines and the Regulation of Luteinizing Hormone Release in the Rat.- Dual Action of Norepinephrine in the Control of Gonadotropin Release