Analysis of luteinizing hormone and follicle-stimulating hormone release kinetics during a dynamic secretory event, the postpartum preovulatory surge in the rat, based on quantitative changes in stored and circulating luteinizing hormone and follicle-stim

abstract：:Testes of 29-35-day-old rats were separated into seminiferous tubules and interstitial tissue by collagenase treatment and examined by incubation studies with radioactive substrates. The activity of testosterone 5alpha-reductase/g protein in the interstitial tissue was 37 times greater than that in the tubules. The si...

journal_title：Endocrinology

authors： Yoshizaki K,Matsumoto K,Samuels LT

更新日期：1978-03-01 00:00:00

abstract：:The direct effects of cortisol and cortisone on insulin and glucagon secretion by the isolated perfused rat pancreas were examined. Cortisone, but not cortisol, in a final concentration of 10(-4) M acutely and strongly inhibited both phases of glucose- and arginine-induced insulin secretion. In repeated pulse administ...

journal_title：Endocrinology

authors： Barseghian G,Levine R,Epps P

更新日期：1982-11-01 00:00:00

abstract：:Previous experiments showed that LSH/SsLak female hamsters cease ovarian cyclicity after 2-4 weeks of short photoperiod (SP) treatment. This study was designed to reveal early hormonal and histological changes on day 1 of the estrous cycle (estrus) in SP-treated animals and changes brought about by the SP-induced acyc...

journal_title：Endocrinology

authors： Hauser UE,Benson B

更新日期：1987-01-01 00:00:00

abstract：:An increasing body of evidence has linked AMP-activated protein kinase (AMPK) and malonyl coenzyme A (CoA) to the regulation of energy balance. Thus, factors that activate AMPK and decrease the concentration of malonyl CoA in peripheral tissues, such as exercise, decrease triglyceride accumulation in the adipocyte and...

journal_title：Endocrinology

authors： Ruderman NB,Saha AK,Kraegen EW

更新日期：2003-12-01 00:00:00

abstract：:Leptin signaling in the hypothalamic arcuate nucleus (ARC) is hypothesized to play an important role in energy homeostasis. To investigate whether leptin signaling limited to this brain area is sufficient to reduce food intake and body weight, we used adenoviral gene therapy to express the signaling isoform of the lep...

journal_title：Endocrinology

authors： Morton GJ,Niswender KD,Rhodes CJ,Myers MG Jr,Blevins JE,Baskin DG,Schwartz MW

更新日期：2003-05-01 00:00:00

abstract：:We have previously demonstrated that CGP 42112 (AT(2) agonist > or =1 nM) markedly reduces catecholamine biosynthesis through AT(2), which is the major angiotensin II (AngII) receptor subtype in cultured porcine chromaffin cells. Also, we have shown that CGP 42112 (> or =1 nM) induces a reduction in cGMP production in...

journal_title：Endocrinology

authors： Takekoshi K,Ishii K,Kawakami Y,Isobe K,Nakai T

更新日期：2001-07-01 00:00:00

abstract：:Steroidogenic acute regulatory protein (StAR) synthesis and steroidogenesis are stimulated by activation of divergent signaling pathways in the adrenal cortex. The two major physiological regulators of aldosterone synthesis in the adrenal zona glomerulosa are angiotensin II (AII) and extracellular K+, which both media...

journal_title：Endocrinology

authors： Clark BJ,Combs R

更新日期：1999-10-01 00:00:00

abstract：:Dynamic bone histomorphometry, [3H]thymidine radioautography, and Northern analysis for bone matrix proteins and insulin-like growth factor-I (IGF-I) were performed in calvariae of ovariectomized (OVX) and estrogen-treated OVX rats. Treatment of OVX rats with diethylstilbestrol (DES) for 2 weeks reduced the periosteal...

journal_title：Endocrinology

authors： Turner RT,Backup P,Sherman PJ,Hill E,Evans GL,Spelsberg TC

更新日期：1992-08-01 00:00:00

abstract：:Interleukin-1 alpha (IL-1 alpha) and IL-1 beta bind to either the p80 type I IL-1 receptor (IL-1RI) or the p68 type II IL-1R (IL-1RII) on both T and B lymphocytes. We and others have previously shown that the anterior pituitary gland also has specific high affinity binding sites for IL-1 alpha (Kd = approximately 1 nM...

journal_title：Endocrinology

authors： French RA,Zachary JF,Dantzer R,Frawley LS,Chizzonite R,Parnet P,Kelley KW

更新日期：1996-09-01 00:00:00

abstract：:Hyperandrogenism, disturbance of the hypothalamus-pituitary-ovary axis followed by elevated serum luteinizing hormone (LH) levels, and insulin resistance are involved in the complicated pathophysiology of polycystic ovary syndrome (PCOS). Kisspeptin is coexpressed with neurokinin B (NKB) in the arcuate nucleus (ARC), ...

journal_title：Endocrinology

authors： Osuka S,Iwase A,Nakahara T,Kondo M,Saito A,Bayasula,Nakamura T,Takikawa S,Goto M,Kotani T,Kikkawa F

更新日期：2017-02-01 00:00:00

abstract：:We investigated whether genetic selection for growth influences pituitary GH secretion in two strains of rats, LL (large) and SS (small). Animals were bled every 15 min for 6 h via an indwelling atrial Silastic catheter, and GH levels were determined by RIA. LL and SS males displayed a low frequency, high amplitude ep...

journal_title：Endocrinology

authors： O'Sullivan D,Millard WJ,Badger TM,Martin JB,Martin RJ

更新日期：1986-11-01 00:00:00

abstract：:Proteolytic degradation of extracellular matrix components has been suggested to play an essential role in the occurrence of ovulation. Recent studies in our laboratory have indicated that the plasminogen activator and matrix metalloproteinase systems, which were previously believed to be crucial for ovulation, are no...

journal_title：Endocrinology

authors： Wahlberg P,Nylander A,Ahlskog N,Liu K,Ny T

更新日期：2008-10-01 00:00:00

abstract：:The influence of hormones on the synthesis of phospholipids of lung lamellar bodies was studied using lung tissue explants from 16- to 22-week gestational age human abortuses. Lung explants were incubated in a defined medium containing either no hormonal additions or insulin (2.5 micrograms/ml), cortisol (0.2 microgra...

journal_title：Endocrinology

authors： Snyder JM,Longmuir KJ,Johnston JM,Mendelson CR

更新日期：1983-03-01 00:00:00

abstract：:The formation of junctional complexes between adjacent epithelial principal cells leads to formation of the blood-epididymal barrier; this barrier is complete by 21 days of postnatal age. Cadherins are cell surface proteins that mediate intercellular adhesion and are involved in the formation of adherence, gap, and ti...

journal_title：Endocrinology

authors： Cyr DG,Hermo L,Robaire B

更新日期：1993-03-01 00:00:00

abstract：:A central feature of glucocorticoid (GC)-induced osteoporosis is decreased bone formation, secondary to decreased numbers of functional osteoblasts. We find that ERK activity is essential for serum-induced osteoblast proliferation in vitro because inhibition of MAPK/ERK kinase activity by U0126 completely abolished bo...

journal_title：Endocrinology

authors： Engelbrecht Y,de Wet H,Horsch K,Langeveldt CR,Hough FS,Hulley PA

更新日期：2003-02-01 00:00:00

abstract：:Studies show that a subset of transgender men desire children; however, there is a paucity of literature on the effect of gender-affirming testosterone therapy on reproductive function. In this manuscript, we will review the process of gender-affirming hormone therapy for transgender men and what is known about ovaria...

journal_title：Endocrinology

authors： Moravek MB,Kinnear HM,George J,Batchelor J,Shikanov A,Padmanabhan V,Randolph JF

更新日期：2020-03-01 00:00:00

abstract：:Perifused anterior hemipituitaries from one male and 4 female monkeys released GH and PRL in a pulsatile pattern, with mean +/- SE interpulse intervals of 8.2 +/- 0.4 and 8.5 +/- 0.3 min, as determined by a cycle detection computer algorithm. Mean hormone concentrations in the perifusate fractions collected at 2-min i...

journal_title：Endocrinology

authors： Stewart JK,Clifton DK,Koerker DJ,Rogol AD,Jaffe T,Goodner CJ

更新日期：1985-01-01 00:00:00

abstract：:Synthesis of uteroglobin in rabbit uterine epithelial cells during early pregnancy is induced by progesterone and apparently suppressed by estrogen. To assess whether the steroid hormones exert regulatory effects on the expression of the uteroglobin gene, we performed transcriptional rate assays in endometrial nuclei ...

journal_title：Endocrinology

authors： Shen XZ,Tsai MJ,Bullock DW,Woo SL

更新日期：1983-03-01 00:00:00

abstract：:A novel NADPH-dependent cytosolic 3,5,3'-triiodo-L-thyronine (T3)-binding protein (CTBP) was purified by sequential fractionation of rat liver cytosol on Q-Sepharose, phenyl-Sepharose, red-Sepharose, and polyacrylamide gel electrophoresis under nondenaturing conditions. The CTBP had a sedimentation coefficient of 5.1S...

journal_title：Endocrinology

authors： Kobayashi M,Hashizume K,Suzuki S,Ichikawa K,Takeda T

更新日期：1991-10-01 00:00:00

abstract：:Estradiol (E(2)) rapidly and strongly induces vascular endothelial growth factor (VEGF) transcription in uterine endometrial epithelial cells in vivo. We have shown that this is mediated by both the estrogen receptor-alpha and hypoxia-inducible factor (HIF)-1alpha. By contrast, E(2) induces little or no VEGF expressio...

journal_title：Endocrinology

authors： Molitoris KH,Kazi AA,Koos RD

更新日期：2009-12-01 00:00:00

abstract：:In rats, protein hydrolysates (peptones) stimulate cholecystokinin (CCK) release both in vivo and in a model of isolated vascularly perfused duodeno-jejunum. However, the mechanisms involved in peptone-induced stimulation of CCK cells are not well understood. In particular, the possibility that peptones may directly i...

journal_title：Endocrinology

authors： Cordier-Bussat M,Bernard C,Haouche S,Roche C,Abello J,Chayvialle JA,Cuber JC

更新日期：1997-03-01 00:00:00

abstract：:Even though functional CRH receptors have been identified in several brain regions by ligand binding, the identity of brain areas expressing the CRH receptor gene has not been described. The recent cloning of the rat CRH receptor gene has permitted us to conduct an in situ hybridization histochemistry study to localiz...

journal_title：Endocrinology

authors： Wong ML,Licinio J,Pasternak KI,Gold PW

更新日期：1994-11-01 00:00:00

abstract：:Artificial copulomimetic cervical stimulation (CS) induces an immediate release of oxytocin (OT) and prolactin (PRL) followed by a daily PRL rhythm characterized by nocturnal and diurnal surges. Although we have shown that the initial release of PRL is induced by the immediate release of OT, we tested whether the PRL ...

journal_title：Endocrinology

authors： Helena CV,McKee DT,Bertram R,Walker AM,Freeman ME

更新日期：2009-07-01 00:00:00

abstract：:It was previously reported that PRL can stimulate FSH release in immature female rats and PRL-deficient male dwarf mice. We have examined the effects of PRL-producing ectopic pituitary grafts on plasma FSH and LH levels in adult male golden hamsters during exposure to both long (14 h of light, 10 h of darkness) and sh...

journal_title：Endocrinology

authors： Bartke A,Siler-Khodr TM,Hogan MP,Roychoudhury P

更新日期：1981-01-01 00:00:00

abstract：:The structural requirements for the inhibition of net bone collagen synthesis by parathyroid hormone (PTH) in vitro have been examined by study of the effects of selected fragments and analogs of bovine PTH (bPTH) upon the incorporation of [3H]proline into collagenase-digestible and -nondigestible proteins by neonatal...

journal_title：Endocrinology

authors： Bringhurst FR,Potts JT Jr

更新日期：1981-01-01 00:00:00

abstract：:Purinergic G protein-coupled receptors (P2YR) and ion-conducting receptor-channels (P2XR) are present in the pituitary. However, their identification, expression within pituitary cell subpopulations, and the ability to elevate intracellular Ca2+ concentration ([Ca2+]i) in response to ATP stimulation were incompletely ...

journal_title：Endocrinology

authors： Koshimizu TA,Tomić M,Wong AO,Zivadinovic D,Stojilkovic SS

更新日期：2000-11-01 00:00:00

abstract：:Diabetics have at least twice the risk of stroke and may show performance deficit in a wide range of cognitive domains. The mechanisms underlying this gradually developing end-organ damage may involve both vascular changes and direct damage to neuronal cells as a result of overproduction of superoxide by the respirato...

journal_title：Endocrinology

authors： Aragno M,Mastrocola R,Medana C,Restivo F,Catalano MG,Pons N,Danni O,Boccuzzi G

更新日期：2005-12-01 00:00:00

abstract：:Flavonoids are functional constituents of many fruits and vegetables. Some flavonoids have antidiabetic properties because they improve altered glucose and oxidative metabolisms of diabetic states. Procyanidins are flavonoids with an oligomeric structure, and it has been shown that they can improve the pathological ox...

journal_title：Endocrinology

authors： Pinent M,Blay M,Bladé MC,Salvadó MJ,Arola L,Ardévol A

更新日期：2004-11-01 00:00:00

abstract：:3-Hydroxy-3-methylglutaryl coenzyme-A (HMG-CoA) reductase activity and reductase mRNA level were determined in adrenals from hamsters treated with ACTH, with or without cycloheximide or aminoglutethimide. Both reductase activity and reductase mRNA level were similarly enhanced by ACTH administration compared to levels...

journal_title：Endocrinology

authors： Lehoux JG,Lefebvre A,De Médicis E,Bélisle S,Bellabarba D

更新日期：1989-07-01 00:00:00

abstract：:The levels of two steroid-binding proteins, progesterone-binding globulin (PBG) (1) and corticosteroid-binding globulin (CBG), present in the plasma of pregnant guinea pigs were determined just before and after parturition. Both PBG (3.37 +/- 2.1 microM) and CBG (10.1 +/- 1.7 microM) were present in high levels just b...

journal_title：Endocrinology

authors： Raymoure WJ,Kuhn RW

更新日期：1980-06-01 00:00:00