Spermatogenesis, epididymis morphology and plasma sex steroid secretion in the male lizard Podarcis sicula exposed to diuron

2008 ◽  
Vol 108 (2) ◽  
pp. 214-223 ◽  
Author(s):  
Anna Cardone ◽  
Raffaella Comitato ◽  
Francesco Angelini
Keyword(s):  
Sex Steroid ◽  
Podarcis Sicula ◽  
Steroid Secretion ◽  
Male Lizard

scholarly journals Effects of Melatonin on Peripheral Reproductive Function: Regulation of Testicular GnIH and Testosterone

Endocrinology ◽  
2011 ◽  
Vol 152 (9) ◽  
pp. 3461-3470 ◽  
Author(s):  
Nicolette L. McGuire ◽  
Kristina Kangas ◽  
George E. Bentley
Keyword(s):  
Expression Patterns ◽  
Reproductive Function ◽  
Melatonin Receptors ◽  
Sex Steroid ◽  
European Starlings ◽  
Steroid Secretion ◽  
Local Inhibition ◽  
Gonadotropin Inhibitory Hormone ◽  
The Brain

Study of seasonal reproduction has focused on the brain. Here, we show that the inhibition of sex steroid secretion can be seasonally mediated at the level of the gonad. We investigate the direct effects of melatonin on sex steroid secretion and gonadal neuropeptide expression in European starlings (Sturnus vulgaris). PCR reveals starling gonads express mRNA for gonadotropin inhibitory hormone (GnIH) and its receptor (GnIHR) and melatonin receptors 1B (Mel 1B) and 1C (Mel 1C). We demonstrate that the gonadal GnIH system is regulated seasonally, possibly via a mechanism involving melatonin. GnIH/ GnIHR expression in the testes is relatively low during breeding compared with outside the breeding season. The expression patterns of Mel 1B and Mel 1C are correlated with this expression, and melatonin up-regulates the expression of GnIH mRNA in starling gonads before breeding. In vitro, GnIH and melatonin significantly decrease testosterone secretion from LH/FSH-stimulated testes before, but not during, breeding. Thus local inhibition of sex steroid secretion appears to be regulated seasonally at the level of the gonad, by a mechanism involving melatonin and the gonadal GnIH system.

Experimentally nonylphenol-polluted diet induces the expression of silent genes VTG and ERα in the liver of male lizard Podarcis sicula

2011 ◽  
Vol 159 (5) ◽  
pp. 1101-1107 ◽  
Author(s):  
Mariailaria Verderame ◽  
Marina Prisco ◽  
Piero Andreuccetti ◽  
Francesco Aniello ◽  
Ermelinda Limatola
Keyword(s):  
Podarcis Sicula ◽  
Male Lizard ◽  
Silent Genes

The VIP/VPACR system in the reproductive cycle of male lizard Podarcis sicula

2014 ◽  
Vol 205 ◽  
pp. 94-101 ◽  
Author(s):  
Marisa Agnese ◽  
Luigi Rosati ◽  
Marina Prisco ◽  
Francesca Coraggio ◽  
Salvatore Valiante ◽  
...  
Keyword(s):  
Reproductive Cycle ◽  
Podarcis Sicula ◽  
Male Lizard

Is Corticosterone Involved in the Reproductive Processes of the Male Lizard, Podarcis sicula sicula?

1994 ◽  
Vol 28 (2) ◽  
pp. 117-129 ◽  
Author(s):  
Clotilde Manzo ◽  
Massimo Zerani ◽  
Anna Gobbetti ◽  
Maria Maddalena Di Fiore ◽  
Francesco Angelini
Keyword(s):  
Podarcis Sicula ◽  
Male Lizard ◽  
Reproductive Processes
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