Journal ArticleDOI
Functional development of the hypothalamic-adenohypophyseal-testicular (HAT) axis in the chick embryo.
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TLDR
Observations are interpreted as demonstrating that in the chick embryo the adenohypophyseal-testicular axis is functional by Day 13.5 of incubation, and there are also indications that the hypothalamic-adenohyp Oxygen-Testicular complex is functional at this same embryonic time.About:
This article is published in General and Comparative Endocrinology.The article was published on 1983-05-01. It has received 17 citations till now. The article focuses on the topics: Luteinizing hormone & Hypophysectomy.read more
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Journal ArticleDOI
Reproductive endocrinology of free-living nestling and juvenile starlings, Sturnus vulgaris; an altricial species
TL;DR: The results suggest that the reproductive system of nestling and juvenile starlings is in a similar state to that of post-breeding photorefractory adult starlings, and comparatively high levels of testosterone may reflect involvement in sexual differentiation.
Journal ArticleDOI
Ontogeny of hypothalamo-adenohypophyseal-gonadal (HAG) interrelationships in the chick embryo.
James E. Woods,Robert C. Thommes +1 more
TL;DR: In the male chick embryo, feed forward regulation of the pituitary-testicular unit appears to involve a cause and effect relation between a statistically significant increase in the number of testicular interstitial cell LH receptors on days 12.5 and 13.0 and an increase in plasma LH levels on day 13.5.
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Plasma LH and gonadal LH-binding cells in normal and surgically decapitated chick embryos
James E. Woods,Colin G. Scanes,Maureen A. Seeley,Philip Cozzi,Felix Onyeise,Robert C. Thommes +5 more
TL;DR: It is demonstrated that LH is already present in the plasma of male and female embryos as early as Day 10.5, the first day examined, and pituitary transplants to the chorioallantoic membrane of hypophysectomized embryos elevated plasma LH concentrations to levels not statistically different from those of intacts.
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Adenohypophysis regulates cell proliferation in the gonads of the developing chick embryo.
TL;DR: Effect of hypophysectomy on cell proliferation in the left ovary and the left testis of 8- to 14-day-old chick embryos and changes in the total number of somatic and germ cells further suggest that the absence of hypophysis affects the growth of the ovary earlier than therowth of the testis.
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Biosynthetic pathways of testosterone and estradiol-17β in slices of the embryonic ovary and testis of the chicken (Gallus domesticus)
TL;DR: Both delta 4- and delta 5-pathways are involved in the formation of testosterone and then finally of estradiol-17 beta by the embryonic gonads of the chicken, and relative preference for the pathway seems to depend on sexes and embryonic ages.
References
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The Attractions of Proteins for Small Molecules and Ions
TL;DR: The number and variety of known compounrjs between proteins and small molecules are increasing rapidly and make a fascinating story as discussed by the authors, and there are many compounds of serum albumin, which was used during the war by many chemists, most of whom found at least one 6ew compound.
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Statistical Quality Control and Routine Data Processing for Radioimmunoassays and Immunoradiometric Assays
TL;DR: Numerous methods are available for the graphical display of radioimmunoassay dose—response curves, for curve-fitting and dose interpolation, for statistical quality control, and for automation and computerization of data processing.
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Production and secretion of sex steroid hormones by the testes, the ovary, and the adrenal glands of embryonic and young chickens (Gallus domesticus).
TL;DR: It seems that the adrenal glands have a more important role in the production and secretion of testosterone than the testes or the ovary in the embryonic chicks, and that the embryonic testes are less active than the embryonic ovary for the production of testosterone and estradiol.
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Plasma testosterone levels in the chick embryo.
TL;DR: The findings of this investigation are consonant with the view that androgens are the hormonal agents responsible for the regression of both Mullerian ducts in male and the right Mullerianduct in female embryos.