Prostaglandins and steroid hormones in plasma and ovarian follicles during the ovulation cycle of the domestic hen (Gallus domesticus)

Hammond, R.W.; Olson, David M.; Frenkel, Rina; Biellier, H. V.; Hertelendy, F.

doi:10.1016/0016-6480(80)90188-4

Cited by 62 publications

(19 citation statements)

References 24 publications

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“…The concentrations of steroid hormones in both the plasma and follicles of females are known to undergo changes over the course of clutch formation (Shahabi et al 1975;Wingfield & Farner 1978a, b;Donham 1979;Hammond et al 1980;Johnson & van Tienhoven 1980;Etches & Cheng 1981;Bahr et al 1983). In the canary, there is a correlation between maternal faecal testosterone concentration during yolk deposition of individual eggs and the concentration of yolk testosterone in those eggs after they have been laid (Schwabl 1996a).…”

Section: Sex Steroid Hormonesmentioning

confidence: 97%

Hormonal Regulation of Begging Behaviour

Schwabl

Lipar

2002

The Evolution of Begging

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Begging is the first coordinated behaviour altricial birds perform after hatching. As the neuromuscular substrates, brain, sensory organs and endocrine systems mature, this simple reflex develops rapidly into a more complex behaviour that is influenced by external stimuli and by internal signals such as hormones. In this chapter we discuss the maturation of endocrine systems and the role of hormones in the regulation of begging in altricial birds and describe the development of physiological systems that may influence begging performance. First, we elaborate on the neuromuscular and sensory substrates that may be involved in the begging response. Then, we describe the development and maturation of relevant endocrine regulatory systems that may influence intensity, frequency and duration of begging. We also discuss effects of endogenous and maternallyderived hormones on the development, regulation and performance of begging. Finally, we suggest several approaches to the study of begging that may be useful for testing evolutionary theories such as parent-offspring conflict, sibling rivalry and parental favouritism.

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Section: Sex Steroid Hormonesmentioning

confidence: 97%

Hormonal Regulation of Begging Behaviour

Schwabl

Lipar

2002

The Evolution of Begging

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“…In the egg-laying hen, PGs are involved in initiating oviposition [5][6][7][8] and stimulating uterine contraction [9]. Although the endocrine control of ovarian PG secretion, particularly by gonadotropin, has been extensively examined in many species [3,10], the role of intraovarian growth factors such as transforming growth factor alpha (TGFa) and beta (TGFP) in the regulation of PG secretion by granulosa cells remains to be defined.…”

Section: Introductionmentioning

confidence: 99%

Avian Granulosa Cell Prostaglandin Secretion is Regulated by Transforming Growth Factor α and β and Does Not Control Plasminogen Activator Activity during Follicular Development1

Li²,

Lafrance³

et al. 1994

Biology of Reproduction

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The aim of the present study was to determine the role of transforming factor alpha (TGF alpha) and beta (TGF beta) in the regulation of prostaglandin (PG) secretion, and the relationships between PG and plasminogen activator (PA) activity in hen granulosa cells during ovarian follicular development. Cells from the first (F1), third (F3), and fifth and sixth (F5-6) largest preovulatory follicles were cultured for up to 21 h in the presence of TGF alpha (0.1-10 ng/ml) and/or TGF beta (4-20 ng/ml) or TGF alpha together with a cyclooxygenase inhibitor, indomethacin (0.05-0.5 microM). The release of PG into the incubation medium was determined by RIA. Cell-associated (PAc) and secreted (PAs) PA activities were measured by a fibrinolysis assay and characterized by zymography. Basal PGF secretion from F1, F3, and F5-6 cells was 2.2 +/- 0.3, 2.2 +/- 0.5, and 1.1 +/- 0.3 ng/micrograms DNA, respectively, and was higher than that of PGE. Basal total PA (PAc+PAs) activity from F1, F3, and F5-6 cells was 41 +/- 13,261 +/- 68, and 958 +/- 268 x 10(3) cpm/micrograms DNA, respectively. TGF alpha stimulated PG secretion and PA activity in a dose-dependent manner. The TGF alpha-induced PA activity was predominantly associated with a molecular mass of 30-35 kDa, corresponding to that of urokinase PA. The stimulation of PG secretion by TGF alpha was maximal in F3 and F1 granulosa cells whereas PA activity in the presence of TGF alpha was highest in cells from F5-6 follicles.(ABSTRACT TRUNCATED AT 250 WORDS)

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“…White Leghorn hens in their first year of egg laying were caged individually, in a windowless air-conditioned room with lights on from 06:00 to 20:00 h. The birds had free access to a pelleted commercial laying ration (Purina Layena) and tap water. The time of oviposition was monitored by an electronic device (Hammond et a!, 1980) and birds with at least 6 consecutive laying days were selected for experiments.…”

Section: Methodsmentioning

confidence: 99%

Influence of follicular maturation on 3-hydroxy-methylglutaryl coenzyme A reductase activity in hen granulosa cells

Asem¹,

Hertelendy²

1987

Reproduction

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The activity of 3-hydroxy-3-methylglutaryl coenzyme A reductase (HMG-CoA reductase: EC 1.1.1.34) was measured in a microsomal preparation of the granulosa of rapidly growing ovarian follicles of laying hens in the late preovulatory period (2-3 h before expected ovulation). The specific activity of the enzyme was measured in the five largest (F1-F5) preovulatory follicles, F1 being the follicle destined to ovulate first. Enzyme activity increased concomitantly with follicle size. The apparent Km of the enzyme decreased 60-80% from the smallest to the largest preovulatory follicle. There was no significant change in the Vmax during follicle development. Although our results have demonstrated the presence of HMG/CoA reductase in chicken granulosa cells and the progressive increase of its activity with follicular maturation, the quantitative significance of de-novo synthesized cholesterol as steroid hormone precursor remains to be ascertained.

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Prostaglandins and steroid hormones in plasma and ovarian follicles during the ovulation cycle of the domestic hen (Gallus domesticus)

Cited by 62 publications

References 24 publications

Hormonal Regulation of Begging Behaviour

Hormonal Regulation of Begging Behaviour

Avian Granulosa Cell Prostaglandin Secretion is Regulated by Transforming Growth Factor α and β and Does Not Control Plasminogen Activator Activity during Follicular Development1

Influence of follicular maturation on 3-hydroxy-methylglutaryl coenzyme A reductase activity in hen granulosa cells

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