Document Detail


Morphological and endocrine study of the ovarian interstitial tissue of viscacha (Lagostomus maximus maximus).
MedLine Citation:
PMID:  17530627     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The morphological and endocrine aspects of the ovarian interstitial tissue of adult female viscachas were investigated to establish the probable function and the biological significance of this compartment in this rodent. Pregnant and nonpregnant adult female viscachas were used. The histological characteristics, histochemical properties, and ultrastructural features of the interstitial tissue were studied. A morphometric study was carried out to measure the relative area of lipid droplets. The progesterone and androstenedione levels in ovarian tissue as well as in serum were determined by radioimmunoassay. In this species, the histological observations showed an abundant interstitial tissue that contained a large amount of lipids. The cholesterol and its esters were present in nonpregnant females and were scarce in pregnant animals. The most ultrastructural differences were observed at mid-pregnancy. At this stage, the interstitial cells showed features that suggested higher steroidogenic activity. Furthermore, during mid-pregnancy, the relative area of lipid droplets was smaller. Both progesterone and androstenedione levels in ovarian tissue and serum were higher during pregnancy. Our results suggest that the interstitial tissue may be storage of precursor substances for the steroidogenesis via. These precursors are probably used when the endocrine requirements are high, that is, during the pregnancy. Thus, this compartment may contribute to the normal gestation of Lagostomus. However, the relation between the interstitial tissue and the pregnancy is complex, and further studies are needed to clearly establish it.
Authors:
Esteban Gil; Myriam Forneris; Susana Domínguez; Alicia Penissi; Teresa Fogal; Ramón S Piezzi; Luis Scardapane
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Anatomical record (Hoboken, N.J. : 2007)     Volume:  290     ISSN:  1932-8486     ISO Abbreviation:  Anat Rec (Hoboken)     Publication Date:  2007 Jul 
Date Detail:
Created Date:  2007-06-18     Completed Date:  2007-07-31     Revised Date:  2009-12-16    
Medline Journal Info:
Nlm Unique ID:  101292775     Medline TA:  Anat Rec (Hoboken)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  788-94     Citation Subset:  IM    
Copyright Information:
(c) 2007 Wiley-Liss, Inc.
Affiliation:
Area de Morfología, Universidad Nacional de San Luis, San Luis, Argentina. estebang@unsl.edu.ar
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MeSH Terms
Descriptor/Qualifier:
Androstenedione / blood,  metabolism*
Animals
Cholesterol / metabolism
Female
Lipid Metabolism*
Microscopy, Electron
Ovary / cytology,  metabolism*
Pregnancy
Progesterone / blood,  metabolism*
Radioimmunoassay
Reproduction / physiology*
Rodentia / physiology*
Theca Cells / metabolism*,  ultrastructure
Chemical
Reg. No./Substance:
57-83-0/Progesterone; 57-88-5/Cholesterol; 63-05-8/Androstenedione

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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