P. D. Schoppee

Works (2)

Updated: July 5th, 2023 15:52

1996 journal article

Immunization against growth hormone releasing factor or chronic feed restriction initiated at 3.5 months of age reduces ovarian response to pulsatile administration of gonadotropin-releasing hormone at 6 months of age and delays onset of puberty in heifers

BIOLOGY OF REPRODUCTION, 55(1), 87–98.

By: P. Schoppee n, J. Armstrong  n, R. Harvey n, M. Whitacre n, A. Felix * & R. Campbell *

MeSH headings : Aging; Animals; Cattle; Estradiol / blood; Female; Follicle Stimulating Hormone / blood; Follicular Fluid / metabolism; Food Deprivation; Gonadotropin-Releasing Hormone / administration & dosage; Gonadotropin-Releasing Hormone / pharmacology; Growth Hormone / blood; Growth Hormone-Releasing Hormone / immunology; Growth Hormone-Releasing Hormone / physiology; Immunization; Insulin-Like Growth Factor I / metabolism; Kinetics; Luteinizing Hormone / blood; Ovary / drug effects; Ovary / physiology; Periodicity; Sexual Maturation
TL;DR: The hypothesis that reduced serum IGF-I results in decreased serum E2, which in turn delays onset of puberty in heifers is hypothesized, and data support the hypothesis. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1995 journal article

Endocrine and ovarian responses to exogenous estradiol-17beta in 6-month-old heifers previously immunized against growth hormone-releasing factor

Journal of Animal Science, 73(7), 2071.

By: P. Schoppee n, J. Armstrong n, R. Harvey n, S. Washburn n, A. Felix * & R. Campbell *

MeSH headings : Animals; Cattle / metabolism; Cattle / physiology; Estradiol / blood; Estradiol / pharmacology; Female; Growth Hormone-Releasing Hormone / immunology; Hypothalamo-Hypophyseal System / drug effects; Hypothalamo-Hypophyseal System / physiology; Immunization / veterinary; Luteinizing Hormone / blood; Ovary / drug effects; Ovary / physiology; Progesterone / blood; Serum Albumin / analysis; Sexual Maturation / drug effects
TL;DR: It is concluded that GRFi does not impair the release of an E2-induced LH surge, but it does decrease hypothalamo-hypophyseal sensitivity to the inhibitory effect of E2. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (OpenAlex)
Source: NC State University Libraries
Added: August 6, 2018

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