PMID: 3770443Jul 1, 1986Paper

Vitellogenesis in the lizard Lacerta vivipara jacquin. II. Vitellogenin synthesis during the reproductive cycle and its control by ovarian steroids

General and Comparative Endocrinology
J Gavaud

Abstract

An analysis of the development of the vitellogenic process following artificial hibernation in the lizard Lacerta vivipara was undertaken. For that purpose, organ weights (ovaries, oviducts, liver, fat bodies) and plasma concentrations of total proteins, calcium, and estrogens were monitored. The induction of the vitellogenic growth of 2-5 oocytes per ovary was characterized by a rapid increase in calcemia (from 2.4-2.6 mM to 4-10 mM), and in oviduct and liver weights. During the active and continuous phase of vitellus incorporation (congruent to 3 weeks, follicle diameter 1.6-2.0 mm to greater than 5 mm) the developments of ovaries and oviducts were positively correlated, liver weight and calcemia remained elevated (respectively, 1.2-2.2 times and 2.5-3.5 times the previtellogenic values). Ovulation was preceded by a significant rise in calcemia and followed by a decrease in liver weight, but no modification of oviduct mass. Plasma concentration in total proteins (50-60 mg/ml) was not modified during the entire process. Plasma estrogens were difficult to measure in this small species. Levels of estradiol-17 beta were very often below the assay sensitivity (less than 0.3-0.6 ng/ml), never above 2 ng/ml, and very variable among ...Continue Reading

References

Feb 1, 1972·General and Comparative Endocrinology·I P CallardW F McConnell
Mar 15, 1972·Comparative Biochemistry and Physiology. B, Comparative Biochemistry·I P CallardW L Banks
Feb 1, 1981·General and Comparative Endocrinology·B I Sundararaj, P Nath
Nov 1, 1981·General and Comparative Endocrinology·R A MeadD R Highfill
Mar 1, 1961·The Journal of General Physiology·M R URIST, A O SCHJEIDE

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Citations

Apr 15, 2000·General and Comparative Endocrinology·A P Amey, J M Whittier
May 17, 2011·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Bridget F Murphy, Michael B Thompson
Jan 1, 1991·Comparative Biochemistry and Physiology. B, Comparative Biochemistry·C Baerga-Santini, M Hernández de Morales
Jun 1, 1996·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·M H MoralesN Cordero-López
Apr 9, 2009·PloS One·Patrick S FitzeJean Clobert
Aug 1, 2012·Comptes rendus biologies·Sadjia Benmansour HammoucheJean-Marie Exbrayat
May 6, 2006·Journal of Evolutionary Biology·J-F Le GalliardJ Clobert
Dec 1, 1991·General and Comparative Endocrinology·O CarnevaliA Polzonetti-Magni
Aug 6, 2013·Hormones and Behavior·Jill E SchneiderErin Keen-Rhinehart
Jul 13, 2002·The Journal of Experimental Zoology·Jane E Girling
Jun 28, 2016·Biological Reviews of the Cambridge Philosophical Society·Edwin R Price
May 13, 2020·The Journal of Experimental Biology·Willow R LindsayMats Olsson

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