The Positive Feedback Action of Estrogen Mobilizes LH-Containing, but not FSH-Containing Secretory Granules in Ovine Gonadotropes
نویسندگان
چکیده
منابع مشابه
FSH LH : FSH ratio
Patient A was a 30-year-old white woman with a longstanding history of primary amenorrhea and infertility. By age 18 the patient had neither menstruated nor demonstrated evidence of normal breast development. At that time she was given oral contraceptives for four cycles and responded with normal vaginal bleeding. Laboratory evaluation at age 18 demonstrated a serum FSH (follicle-stimulating ho...
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Calcium has long been recognized as an essential factor for platelet adhesion and subsequent blood coagulation, and anticoagulation can be achieved with the use of calcium chelators such as EDTA or citrate . The normal level of calcium in plasma is approximately 0 .1 mg/ml; however, dry weight chemical analysis of platelets (5) has indicated that they contain as much as 3 .0 or 4.5 mg calcium/g...
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WEICK, RICHARD F., AND DAVID K. POMERANTZ. M~IMInisrn of ir&don of L,H surgc~ in thu r-hews rrm~&~.v: positiw f~dbrrr~k of estrqprz.2 Am. J. Physiol. 236( II: R102-R106, 1979 or Am. J. Physiol.: RegulatorG Integrative Comp. Physiol. 5( 1): R102-R106, 1979. Exper&nts were desiqed to determine whether the luteinizing hormone (LH) surge induced by estrogen results from a positive feedback effect o...
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We have studied by electron microscopy and immunocytochemistry the formation of secretory granules containing adrenocorticotropic hormone (ACTH) in murine pituitary cells of the AtT20 line. The first compartment in which condensed secretory protein appears is a complex reticular network at the extreme trans side of the Golgi stacks beyond the TPPase-positive cisternae. Condensed secretory prote...
متن کاملEffect of Estrogen Progesterone LH and FSH on Oxidant and Antioxidant Parameters in Rat Uterine Tissue
Background To attain whether the effects of low and high doses of estrogen progesterone luteinizing hormone (LH) and follicle stimulating hormone (FSH) in acute and chronic administration were related to oxidant and antioxidant parameters in rat uterine tissue as well as cyclooxygenase-1 (COX-1) activity. MaterialsAndMethods Acute and chronic administration of estrogen (1 and 5 mg/ kg) progeste...
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ژورنال
عنوان ژورنال: Endocrinology
سال: 1997
ISSN: 0013-7227,1945-7170
DOI: 10.1210/endo.138.3.5104