Failure of Nembutal to Block Ovulation in the Hen

Bastian, J. W.; Zarrow, M. X.

doi:10.3181/00379727-79-19341

Cited by 8 publications

(3 citation statements)

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“…Consequently, in subsequent tests of gelfiltrated extracts, synthetic hormones and biogenic amines, cannula placement and infusion were performed in one session in pentobarbital-anesthetized hens. Pentobarbital, during the period administered, has no effect on ovulation (Bastian and Zarrow, 1952). The effects of surgical and infusion procedures were followed in control hens given infusions of neutral saline.…”

Section: Methodsmentioning

confidence: 99%

In Vivo Studies of Luteinizing Hormone-Releasing Factor in the Chicken Hypothalamus

Opel

Lepore

1972

Poultry Science

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A BSTRA CTInduction of ovulation was used to evaluate luteinizing hormone-releasing factor (LRF) activity in acidic extracts of chicken hypothalamus infused directly into the anterior pituitary of the hen. LRF activity was found in extracts of stalk-median eminence (SME), posterior pituitary and tuberal hypothalamus, but not in extracts of cerebral cortex. The crude SME extract was highly effective in inducing premature ovulation when infused into the adenohypophysis, but evoked no response when infused into adjacent hypothalamic structures or the systemic circulation.On fractionation of the SME extract on Sephadex G-25, LRF activity emerged in the same region of the column effluent as did oxytocic activity. However, a battery of control procedures indicated that the LRF activity is not attributable to mesotocin or arginine vasotocin. Intrapituitary infusion of dopamine, histamine, acetylcholine, epinephrine, norepinephrine or seratonin gave negative results. From these data, LRF in the chicken appears to be a low molecular weight, peptide-like material distinct from known median eminence hormones.

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Section: Methodsmentioning

confidence: 99%

In Vivo Studies of Luteinizing Hormone-Releasing Factor in the Chicken Hypothalamus

Opel

Lepore

1972

Poultry Science

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“…On the other hand, it has no effect on the ovarian response to injections of chorionic gonadotrophin (126). Pentobarbital, which is also effective in blocking the release of LH2 in rabbits and rats, does not prevent ovulation in the hen whether it is induced by progesterone or takes place normally (127).· .…”

Section: Reproduction In the Femalementioning

confidence: 95%

Reproduction

Krohn¹,

Zuckerman²

1953

Annu. Rev. Physiol.

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In 1910, the late Dr. F. H. A. Marshall published the first edition of his Physiology of Reproduction. It represented the first attempt to assemble in the English language the knowledge that was available about the subject of reproduction. A second edition appeared in 1922, but unfortunately missed the very rapid expansion of the subject, especially on the endocrinological side, which took place during the 1920's. A third edition of Marshall's classic, of which one volume has now been published under the editorship of Parkes, again brings the subject up to date, and in the same encyclopaedic form first attempted by Marshall himself.The volume that has appeared (Vol. II) corresponds to the second half of the single volumes of the first and second editions (1). Its chapters deal with the history of the fertilized ovum, cleavage and implantation, placentation, foetal and maternal physiology, parturition, lactation and fertility, and show up, very clearly, the areas in which most progress in knowledge has been made in the past 30 years.Since 1922, we have been provided with detailed knowledge about the chemistry and cytological nature of the ova of different species. Develop ments in microscopy and in methods of tissue culture have made possible the direct study of cleavage in many mammalian species. Another achieve ment of the past 30 years is an understanding of the transport of sperm and ova, and of the factors concerned in the spacing of blastocysts, matters which, in the second edition of Marshall's book, could be dealt with in very few words, in spite of the fact that artificial insemination of farm animals was already being practised. On the other hand, the precise roles of blasto cyst and endometrium in the process of implantation are as uncertain to day as they were 30 years ago, even though the actual facts of implantation may be very much better understood, not only in nonprimate mammals but also in monkeys and man. We owe this advance mainly to the fact that it has become possible to obtain for study material that can be timed in rela tion to the ovarian and uterine cycles.The 1910 chapter on "Foetal Nutrition and the Physiology of the Pla centa" was reprinted almost unchanged in 1922, Marshall noting at the time that little new on this subject had appeared in the preceding decade. Infor mation about the macro-and microscopic structure of the placenta is now 1 The survey of the literature pertaining to this review was completed in June, 1952. I The following abbreviations are used in this chapter: DCA (desoxycorticosterone acetate); PAS (periodic acid-Schiff); LH (luteinizing hormone); CG (chorionic gonadotrophia); FSH (follicle stimulating hormone) : PMS (pregnant mare serum): ACTn (adrenocorticotrophin).429 Annu. Rev. Physiol. 1953.15:429-456. Downloaded from www.annualreviews.org Access provided by University of California -San Francisco UCSF on 02/08/15. For personal use only. Quick links to online content Further ANNUAL REVIEWS

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“…29: 1-6. Taylor, N. B., C. B. Weld, H. D. Branion and H. D. Kay, 1931 (Received for publication March 11, 1966) Although the effects of barbiturates on ovulation have been studied (Fraps and Case, 1953;Fraps and Conner, 1954;Bastian and Zarrow, 1952), the results are not conclusive. The drugs may block ovulation or stimulate it, or they may be completely ineffective.…”

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confidence: 97%