Document Detail


Coeliac ganglion adrenergic activity modifies ovarian progesterone during pregnancy: its inter-relationship with LH.
MedLine Citation:
PMID:  11524237     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Most of the fibres that constitute the superior ovarian nerve (SON) originate at the neuronal bodies of the coeliac ganglion and innervate rat ovarian stroma cells. The purpose of this work was to study the part played by innervation on ovarian release of progesterone on day 15 and at the end of pregnancy in an integrated in vitro system known as the coeliac ganglion-SON-ovary system. We also investigated, in the same system, whether there is some kind of inter-relationship between the effect of adrenergic agents and LH on progesterone release on day 15 of pregnancy. The coeliac ganglion and the ovary were incubated in separate compartments, linked by the SON. The ovary was immersed in 2 ml buffer solution (ovarian compartment) and the coeliac ganglion was immersed in 2 ml of a different buffer solution (ganglion compartment). Under these conditions, the accumulation of progesterone in the ovarian compartment medium was used as an endpoint. Conditions were standardised on day 15 of pregnancy, when the decrease in the release of ovarian progesterone caused by non-specific stimulation on the ganglion with KCl (56 mM) demonstrated the functional integrity of the system. Neural influence was evaluated by the addition of adrenergic agents at a concentration of 10(-6)M to the coeliac ganglion. On day 15 of pregnancy, noradrenaline and propranolol increased progesterone release while phentolamine diminished it. The existence of ganglionic tone was assessed by analysing progesterone basal levels at different stages of pregnancy. The highest secretion of progesterone was found to take place on day 15, diminishing as pregnancy advanced. In addition, adrenergic neural participation was studied during the physiological luteolysis occurring at the end of pregnancy. Major findings were that noradrenaline increased ovarian accumulation of progesterone on day 19 and decreased it on day 20, while propranolol and phentolamine diminished progesterone release on both days. In additional studies, some neuroendocrine aspects were investigated at a peripheral level. The addition of LH only to the ovarian compartment did not affect progesterone secretion. However, when LH in the ovarian compartment was accompanied by noradrenaline, propranolol or phentolamine in the ganglion compartment, the release of progesterone decreased. It can be concluded that modifications of the neural state of the coeliac ganglion affect ovarian progesterone secretion and the physiology of pregnancy via the SON. The results may confirm that the coeliac ganglion-SON-ovary system provides a direct link between the autonomic nervous system and physiological events during pregnancy.
Authors:
M Casais; Z Y Sosa; A M Rastrilla; L I Aguado
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of endocrinology     Volume:  170     ISSN:  0022-0795     ISO Abbreviation:  J. Endocrinol.     Publication Date:  2001 Sep 
Date Detail:
Created Date:  2001-08-28     Completed Date:  2001-10-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0375363     Medline TA:  J Endocrinol     Country:  England    
Other Details:
Languages:  eng     Pagination:  575-84     Citation Subset:  IM    
Affiliation:
Laboratorio de Biología de la Reproducción, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, San Luis (5700), Argentina.
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MeSH Terms
Descriptor/Qualifier:
Adrenergic Agents / pharmacology*
Adrenergic beta-Agonists / pharmacology
Animals
Cell Culture Techniques
Female
Ganglia, Sympathetic / metabolism*
Isoproterenol / pharmacology
Luteal Cells / drug effects,  metabolism
Luteinizing Hormone / pharmacology
Ovary / drug effects,  innervation,  secretion*
Potassium Chloride / pharmacology
Pregnancy
Pregnancy, Animal / metabolism*
Progesterone / secretion*
Rats
Chemical
Reg. No./Substance:
0/Adrenergic Agents; 0/Adrenergic beta-Agonists; 57-83-0/Progesterone; 7447-40-7/Potassium Chloride; 7683-59-2/Isoproterenol; 9002-67-9/Luteinizing Hormone

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