51
|
Hypothalamic Control of Anterior Pituitary Hormone Secretion–Characterized Hypothalamic–Hypophysiotropic Peptides. ACTA ACUST UNITED AC 1974. [DOI: 10.1016/b978-0-12-153202-4.50008-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
52
|
Labhsetwar AP, Zolovick A. Hypothalamic interaction between prostaglandins and catecholamines in promoting gonadotrophin secretion for ovulation. NATURE: NEW BIOLOGY 1973; 246:55-6. [PMID: 4202330 DOI: 10.1038/newbio246055a0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
53
|
|
54
|
Belenky MA, Chetverukhin VK, Polenov AL. The hypothalamo-hypophysial system of the frog Rana temporaria. II. Functional morphology of the external zone of the median eminence during metamorphosis. Gen Comp Endocrinol 1973; 21:250-61. [PMID: 4543145 DOI: 10.1016/0016-6480(73)90057-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
55
|
Belenky MA, Chetverukhin VK, Polenov AL. The hypothalamo-hypophysial system of the frog Rana temporaria. I. Morphometric analysis of functional states of the median eminence. Gen Comp Endocrinol 1973; 21:241-9. [PMID: 4584913 DOI: 10.1016/0016-6480(73)90056-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
56
|
Pfaff D, Keiner M. Atlas of estradiol-concentrating cells in the central nervous system of the female rat. J Comp Neurol 1973; 151:121-58. [PMID: 4744471 DOI: 10.1002/cne.901510204] [Citation(s) in RCA: 1060] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
57
|
Harms PG, Ojeda SR, McCann SM. Prostaglandin involvement in hypothalamic control of gonadotropin and prolactin release. Science 1973; 181:760-1. [PMID: 4724933 DOI: 10.1126/science.181.4101.760] [Citation(s) in RCA: 92] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Prostaglandin E(2) (PGE(2)) injected into the third ventricle of ovariectomized rats increased plasma luteinizing hormone dramatically and follicle stimulating hormone slightly. PGE(1) elevated prolactin; PGF(1alpha) or PGF(2alpha) had no effect. PGE(2) or PGE(1) injected directly into the anterior pituitary were ineffective. These results suggest that specific prostaglandins act at the hypothalamus to control pituitary hormone release.
Collapse
|
58
|
Abstract
Ovariectomized female rats treated with estrogen, in dosages too low to provoke mating, displayed this behavior when given subcutaneous injections of synthetic luteinizing hormone-releasing factor (LRF) 48 hours later. Two hours after the injection of LRF, components of female sexual behavior appeared. The lordosis reflex followed mounting by the male, and darting and hopping behavior was quite prevalent. On the other hand, treatment with estrogen followed by luteinizing hormone, follicle-stimulating hormone, or thyrotropin-releasing factor did not induce copulatory behavior. The results suggest that LRF may play a role in induction of mating behavior.
Collapse
|
59
|
Abstract
Endocrine function has been investigated in four anencephalic neonates to determine the influence of absence of cortical and hypothalamic tissue and of hypoplasia of the pituitary. Intravenous glucose administration resulted in higher peak values for blood sugar and more rapid glucose disposal rates than reported in normals. Intravenous insulin tolerance tests on two of the infants failed to evoke elevations in plasma growth hormone, and the infants showed a remarkable resistance to the hypoglycemic effect of insulin. Administration of lysine-vasopressin caused an active growth hormone release. Similarly, there was a large increase in serum thyrotropin after administration of synthetic thyrotropin-releasing hormone. Basal levels of both thyrotropin and growth hormone were low as compared with values reported for normal newborns. Prolactin values obtained on three of the infants were in the normal range. The results strongly suggest that anterior pituitary function mediated by the hypothalamus and its releasing factors is deficient in anencephaly. However, the anterior pituitary can release growth hormone and thyrotropin when stimulated directly and, in the case of thyrotropin release, may function autonomously. The normal prolactin values presumably reflect the absence of the hypothalamic prolactin inhibitory factor.
Collapse
|
60
|
Nallar R, Biscardi AM. Hypophysial feed-back in the hypothalamic regulation of luteinizing hormone secretion. EXPERIENTIA 1973; 29:878-9. [PMID: 4579649 DOI: 10.1007/bf01946341] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
61
|
|
62
|
|
63
|
Cuello AC, Horn AS, Mackay AV, Iversen LL. Letter: Catecholamines in the median eminence: new evidence for a major noradrenergic input. Nature 1973; 243:465-7. [PMID: 4743641 DOI: 10.1038/243465a0] [Citation(s) in RCA: 105] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
64
|
Ravona H, Snapir N, Perek M. Histological changes of the pituitary gland in cockerels bearing basal hypothalamic lesions and demonstration of its anti-HCG immunofluorescence reacting cells. Gen Comp Endocrinol 1973; 20:490-7. [PMID: 4197591 DOI: 10.1016/0016-6480(73)90080-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
65
|
Häger A, Thorell JI. Studies on growth hormone secretion in a patient with the diencephalic syndrome of emaciation. ACTA PAEDIATRICA SCANDINAVICA 1973; 62:231-40. [PMID: 4703018 DOI: 10.1111/j.1651-2227.1973.tb08098.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
66
|
Page RB, Galicich JH, Grunt JA. Alteration of circadian temperature rhythm with third ventricular obstruction. J Neurosurg 1973; 38:309-19. [PMID: 4121071 DOI: 10.3171/jns.1973.38.3.0309] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
✓ Body temperature and endocrine function were studied in three hydrocephalic patients with tumors in the region of the hypothalamus. A circadian temperature rhythm was present under normal intraventricular pressure but was upset during elevated pressure. The results suggest that the absence of a circadian temperature rhythm in patients with third ventricular neoplasms indicates ventricular obstruction with consequent intracranial pressure and/or hydrocephalus. Conversely, the presence of a circadian temperature rhythm indicates that ventricular obstruction has not occurred or that a shunt system placed to bypass such an obstruction is functioning.
Collapse
|
67
|
Currie BL, Johansson NG, Folkers K. On the chemical existence and partial purification of the hypothalamic follicle stimulating hormone releasing hormone. Biochem Biophys Res Commun 1973; 50:14-9. [PMID: 4567082 DOI: 10.1016/0006-291x(73)91056-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
68
|
Porter JC. Neuroendocrine Systems: the Need for Precise Identification and Rigorous Description of their Operations. PROGRESS IN BRAIN RESEARCH 1973. [DOI: 10.1016/s0079-6123(08)64062-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
|
69
|
Dellmann HD. Degeneration and regeneration of neurosecretory systems. INTERNATIONAL REVIEW OF CYTOLOGY 1973; 36:215-315. [PMID: 4587389 DOI: 10.1016/s0074-7696(08)60219-3] [Citation(s) in RCA: 101] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
70
|
Brinkmann H, Bock R. Influence of various corticoids on the augmentation of "Gomori-positive" granules in the median eminence of the rat following adrenalectomy. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 1973; 280:49-62. [PMID: 4131312 DOI: 10.1007/bf00505354] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
71
|
|
72
|
Porter JC, Mical RS, Ben-Jonathan N, Ondo JG. Neurovascular regulation of the anterior hypophysis. RECENT PROGRESS IN HORMONE RESEARCH 1973; 29:161-98. [PMID: 4584364 DOI: 10.1016/b978-0-12-571129-6.50008-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
73
|
McCann SM, Krulich L, Illner P, Quijada M, Ajika K, Fawcett CP. The adenohypophysial response to stress and its hypothalamic control. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 1973; 33:157-64. [PMID: 4369263 DOI: 10.1007/978-1-4684-3228-2_16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
74
|
Scapagnini U, Preziosi P. Role of brain noradrenaline in the tonic regulation of hypothalamic hypophyseal adrenal axis. PROGRESS IN BRAIN RESEARCH 1973; 39:171-84. [PMID: 4789771 DOI: 10.1016/s0079-6123(08)64075-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
75
|
Zur Kontrolle von Fortpflanzungszyklen bei V�geln. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 1973. [DOI: 10.1007/bf00696350] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
76
|
Bitensky MW, Gorman RE. Cellular responses to cyclic AMP. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 1973; 26:409-61. [PMID: 4350734 DOI: 10.1016/0079-6107(73)90023-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
77
|
Toh YC. Physiological And Biochemical Reviews Of Sex Differences And Carcinogenesis With Particular Reference To The Liver. Adv Cancer Res 1973. [DOI: 10.1016/s0065-230x(08)60752-6] [Citation(s) in RCA: 37] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
78
|
Brokx PA. Ovarian Composition and Aspects of the Reproductive Physiology of Venezuelan White-Tailed Deer (Odocoileus virginianus gymnotis). J Mammal 1972. [DOI: 10.2307/1379212] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
79
|
Borgeat P, Chavancy G, Dupont A, Labrie F, Arimura A, Schally AV. Stimulation of adenosine 3':5'-cyclic monophosphate accumulation in anterior pituitary gland in vitro by synthetic luteinizing hormone-releasing hormone. Proc Natl Acad Sci U S A 1972; 69:2677-81. [PMID: 4341705 PMCID: PMC427015 DOI: 10.1073/pnas.69.9.2677] [Citation(s) in RCA: 118] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
A near-maximal dose (20 ng/ml) of synthetic luteinizing hormone(LH)-releasing hormone/follicle-stimulating hormone(FSH)-releasing hormone added to incubated anterior pituitary tissue of male rats leads to concomitant increases of intracellular concentrations of adenosine 3':5'-monophosphate and of release of both LH and FSH. The stimulatory effect of LH-releasing hormone/FSH-releasing hormone is observed after a lag period of about 90 min and is progressive at later time intervals; a 3-fold stimulation of cAMP accumulation over control is seen after 210 min of incubation. Half-maximal stimulation of cAMP accumulation is observed between 0.1 and 1.0 ng/ml (0.1-1 nM) of LH-releasing hormone/FSH-releasing hormone. In the presence of 10 mM theophylline, the stimulatory effect of LH-releasing hormone/FSH-releasing hormone on cAMP accumulation is similar to that observed in the absence of the inhibitor of cyclic nucleotide phosphodiesterase, indicating that the releasing hormone exerts its effect by specific activation of adenylate cyclase in LH- and FSH-secreting cells rather than by inhibition of cyclic nucleotide phosphodiesterase. Since the release of growth hormone, thyrotropin, prolactin, and adrenocorticotropic hormone is not affected by LH-releasing hormone/FSH-releasing hormone, and since cAMP stimulates the release of all six adenohypophyseal hormones. the observed changes of cAMP concentrations indicate specific stimulation of adenylate cyclase activity in LH-and FSH-secreting cells of the adenohypophysis.
Collapse
|
80
|
|
81
|
Swerdloff RS, Walsh PC, Odell WD. Control of LH and FSH secretion in the male: Evidence that aromatization of androgens to estradiol is not required for inhibition of gonadotropin secretion. Steroids 1972; 20:13-22. [PMID: 5042698 DOI: 10.1016/0039-128x(72)90115-8] [Citation(s) in RCA: 82] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
82
|
|
83
|
Hopkins CR. The biosynthesis, intracellular transport, and packaging of melanocyte-stimulating peptides in the amphibian pars intermedia. J Cell Biol 1972; 53:642-53. [PMID: 5028257 PMCID: PMC2108773 DOI: 10.1083/jcb.53.3.642] [Citation(s) in RCA: 36] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Experiments in which glycine-(3)H has been introduced into excised neurointermediate lobes of Xenopus laevis incubated in a modified Krebs-Ringer bicarbonate medium have shown that approximately 50% of the incorporated radioactivity is present in small peptides which have an electrophoretic mobility characteristic of the melanocyte-stimulating (MSH) peptides shown to be elaborated within the tissue. Based on these results and the demonstration that a discrete approximately 7 min pulse of the label can be introduced into the tissue, electron microscope radioautography has been employed to follow the subcellular events concerned with the synthesis, intracellular transport, and packaging of the labeled secretory product. Together, these studies indicate that the newly synthesized material arises in peptide form, rather than as part of a larger prohormone molecule, on the ribosomes of the rough endoplasmic reticulum within the parenchymal cells of the intermediate portion of the lobe. A proportion is then incorporated into and remains for an extended period within the intracisternal granules which are a feature of the rough endoplasmic reticulum within these cells in vitro Most ( approximately 60%) of the labeled secretory product, however, is transferred to the Golgi complex within 30 min and, within a further 10 min, becomes packaged into small ( approximately 200 mmicro) electron-opaque secretory granules. It is probable that under the conditions employed these granules represent the final intracellular location of secretory product before it is released
Collapse
|
84
|
HUTCHINSON JSM. The oestrous cycle with particular reference to the neural control of the ovary. Mamm Rev 1972. [DOI: 10.1111/j.1365-2907.1972.tb00092.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
85
|
|
86
|
|
87
|
Lemay A, Labrie F. Calcium-dependent stimulation of prolactin release in rat anterior pituitary in vitro by n(6)-monobutyryl adenosine 3',5'-monophosphate. FEBS Lett 1972; 20:7-10. [PMID: 11946368 DOI: 10.1016/0014-5793(72)80003-6] [Citation(s) in RCA: 39] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A Lemay
- Laboratory of Molecular Endocrinology, Faculty of Medicine, Laval University, 10, Quebec, Canada
| | | |
Collapse
|
88
|
|
89
|
Sloper JC. The validity of current concepts of hypothalamo-neurohypophyseal neurosecretion. PROGRESS IN BRAIN RESEARCH 1972; 38:123-43. [PMID: 4591992 DOI: 10.1016/s0079-6123(08)64271-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
90
|
Labrie F, Barden N, Poirier G, De Lean A. Binding of thyrotropin-releasing hormone to plasma membranes of bovine anterior pituitary gland (hormone receptor-adenylate cyclase-equilibrium constant-( 3 H)thyrotropin). Proc Natl Acad Sci U S A 1972; 69:283-7. [PMID: 4621548 PMCID: PMC427592 DOI: 10.1073/pnas.69.1.283] [Citation(s) in RCA: 87] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
An assay for the binding of [(3)H]thyrotropin-releasing hormone ([(3)H]TRH) is described. Plasma membranes isolated from bovine anterior pituitary gland bind about 600 femtomoles of this hormone per mg of protein, as compared to 15 femtomoles per mg of protein in the total adenohypophyseal homogenate (40-fold purification). The equilibrium constant of membrane receptor-[(3)H]TRH binding at 0 degrees C is 4.3 x 10(7) L.M(-1), or a half-maximal binding of this hormone at 23 nM. The binding is time-dependent; addition of unlabeled hormone induces dissociation of the receptor-[(3)H]TRH complex with a half-life of 14 min. The binding of TRH is not altered by 10 muM melanocyte-stimulating hormone-release inhibiting hormone, lysine-vasopressin, adrenocorticotropin, growth hormone, prolactin, luteinizing hormone, insulin, glucagon, L-thyroxine, or L-triiodothyronine. K(+) and Mg(++) increase formation of the receptor-TRH complex at optimal concentrations of 5-25 mM and 0.5-2.5 mM, respectively, with inhibition at higher concentrations. Ca(++) inhibits binding of TRH at all concentrations tested.
Collapse
|
91
|
Guillemin R. Physiology and chemistry of the hypothalamic releasing factors for gonadotropins: a new approach to fertility control. Contraception 1972; 5:1-19. [PMID: 4568272 DOI: 10.1016/0010-7824(72)90076-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
92
|
Shiino M, Arimura A, Schally AV, Rennels EG. Ultrastructural observations of granule extrusion from rat anterior pituitary cells after injection of LH-releasing hormone. ZEITSCHRIFT FUR ZELLFORSCHUNG UND MIKROSKOPISCHE ANATOMIE (VIENNA, AUSTRIA : 1948) 1972; 128:152-61. [PMID: 4555616 DOI: 10.1007/bf00306895] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
93
|
Costom BH, Grumbach MM, Kaplan SL. Effect of thyrotropin-releasing factor on serum thyroid-stimulating hormone. An approach to distinguishing hypothalamic from pituitary forms of idiopathic hypopituitary dwarfism. J Clin Invest 1971; 50:2219-25. [PMID: 4330007 PMCID: PMC292157 DOI: 10.1172/jci106717] [Citation(s) in RCA: 94] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
To test the hypothesis that the primary defect in some patients with idiopathic hypopituitary dwarfism is failure to secrete hypothalamic hypophysiotropic-releasing factors, synthetic thyrotropin-releasing factor (TRF), 500 mug, wa given intravenously, and timed venous samples obtained for determination of the concentration of plasma TSH by radioimmunoassay in three groups of subjects: (a) 11 patients without evidence of endocrine or systemic disease, (group I) (b) 8 with isolated growth hormone deficiency and normal thyroid function, (group II) and (c) 9 patients with idiopathic hypopituitary dwarfism and thyroid-stimulating hormone (TSH) deficiency (group III). The mean fasting plasma TSH value was 4.1 muU/ml in group I, and 3.9 muU/ml in group II; in both groups there was a brisk rise in plasma TSH to peak levels of 12-45 muU/ml at 30-45 min, and a fall toward base line levels at 120 min. All children in group III had basal TSH levels of < 1.5 muU/ml; one failed to respond to TRF; eight exhibited a rise in plasma TSH with peak values comparable with those in groups I and II. In four of eight children in group III who responded to TRF, the TSH response was delayed and the initial rise in plasma TSH was not detectable until 10-60 min. In these four patients, plasma TSH levels continued to rise at 120 min. The mean fasting concentration of plasma thyroxine iodide (T(4)) in subjects with normal thyroid function (groups I and II) was 5.6 mug/100 ml, and the mean plasma T(4) level at 120 min was 6.6 mug/100 ml. This difference between fasting and postTRF plasma T(4) was significant (P < 0.001) by paired analysis. Mean fasting plasma T(4) concentration in group III patients was 1.3 mug/100 ml; after TRF a significant rise in T(4) concentration was not detected in this group. The results indicate that TRF test is useful in distinguishing between primary hypothalamic and pituitary forms of TSH deficiency. In light of the evidence of TRF deficiency in eight of nine patients with idiopathic hypopituitary dwarfism, it seems likely that in these patients, other pituitary hormone deficiencies may be attributable to deficiency of their respective releasing factors.
Collapse
|
94
|
Tashjian AH, Barowsky NJ, Jensen DK. Thyrotropin releasing hormone: direct evidence for stimulation of prolactin production by pituitary cells in culture. Biochem Biophys Res Commun 1971; 43:516-23. [PMID: 4327442 DOI: 10.1016/0006-291x(71)90644-9] [Citation(s) in RCA: 260] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
95
|
Abrams RL, Grumbach MM, Kaplan SL. The effect of administration of human growth hormone on the plasma growth hormone, cortisol, glucose, and free fatty acid response to insulin: evidence for growth hormone autoregulation in man. J Clin Invest 1971; 50:940-50. [PMID: 4926262 PMCID: PMC292009 DOI: 10.1172/jci106566] [Citation(s) in RCA: 80] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The effect of administration of human growth hormone (HGH) (3 mg every 6 hr for 6 days) on the endogenous GH response to insulin-induced hypoglycemia at 8, 12, 24, and 48 hr posttreatment was studied in 11 healthy male adults. Free fatty acid, cortisol, and glucose responses pre- and posttreatment with HGH were evaluated concurrently. Control subjects received saline injections to evaluate relationship of GH responses to the periodicity of insulin tolerance tests. The data were compared for each subject pre- and posttreatment with HGH as well as by comparison of the results of the saline-treated group with those of the HGH-treated group. The mean maximal GH concentration in response to insulin-induced hypoglycemia for all the subjects (n = 16) was 31.1 +/-3.6 ng/ml (+/-SEM) on day 1 of the control period and 23.4 +/-3.1 (SEM) on day 2, not statistically significant.A significant decrease in the maximal peak GH response (n = 8) after insulin-induced hypoglycemia was observed at 8 and 12 hr after HGH administration was terminated with mean peak values for GH of 4.6 +/-1.3 ng/ml and 10.4 +/-1.9 ng/ml, respectively (P < 0.01). A progressive return to control values was noted between 12 and 24 hr. The GH responsiveness of the saline-treated group (n = 5) was unchanged from that observed during the control period. The fasting glucose values were unchanged in the GH-treated group from those of the control period or of the saline-treated controls. Insulin resistance was apparent at 8 hr posttreatment with HGH. No differences in FFA response after insulin-induced hypoglycemia were observed in GH-treated or saline-treated subjects. The rise in plasma cortisol after insulin-induced hypoglycemia was comparable in the GH-treated and saline-treated group. Diurnal variation in plasma cortisol was maintained during the period of GH suppression. These observations support the concept that GH can modulate its secretion by means of an auto-feedback mechanism.
Collapse
|
96
|
|
97
|
Guillemin R, Burgus R, Vale W. The hypothalamic hypophysiotropic thyrotropin-releasing factor. VITAMINS AND HORMONES 1971; 29:1-39. [PMID: 5002592 DOI: 10.1016/s0083-6729(08)60046-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
98
|
Daikoku S, Kotsu T, Hashimoto M. Electron microscopic observations on the development of the median eminence in perinatal rats. ZEITSCHRIFT FUR ANATOMIE UND ENTWICKLUNGSGESCHICHTE 1971; 134:311-27. [PMID: 4330890 DOI: 10.1007/bf00519918] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
99
|
Pelletier G, Peillon F, Vila-Porcile E. An ultrastructural study of sites of granule extrusion in the anterior pituitary of the rat. ZEITSCHRIFT FUR ZELLFORSCHUNG UND MIKROSKOPISCHE ANATOMIE (VIENNA, AUSTRIA : 1948) 1971; 115:501-7. [PMID: 4995772 DOI: 10.1007/bf00335716] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
100
|
Dodd JM, Follett BK, Sharp PJ. Hypothalamic control of pituitary function in submammalian vertebraes. ADVANCES IN COMPARATIVE PHYSIOLOGY AND BIOCHEMISTRY 1971; 4:113-223. [PMID: 4333472 DOI: 10.1016/b978-0-12-011504-4.50009-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|