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Basement membrane in differentiating mesonephric and paramesonephric ducts of male and female rat fetuses.
Paranko, J.; Foidart, Jean-Michel; Pelliniemi, L. J.
1985In Differentiation: Research in Biological Diversity, 29 (1), p. 39-49
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Abstract :
[en] The differentiation of male and female rat genital ducts and their basement membranes were studied by light- and electron-microscopic localization of type-IV and -V collagen, laminin, and heparan sulfate proteoglycan at the fetal ages of 15-21 days. At 15 days, the basement membrane of the mesonephric duct was continuous in both sexes, whereas on the medial side of the paramesonephric duct, it was incomplete. The male mesonephric duct remained enveloped by a continuous basement membrane. Increasing accumulation of basement-membrane material in the periductal mesenchyme was regarded as incipient epididymal differentiation. Local expansions and slow degradation of the basement membrane were noted in the regressing female mesonephric duct. The female paramesonephric duct had acquired a continuous basement membrane by the age of 16 days. At this age, the incomplete basement membrane in the medial side of the male paramesonephric duct disappeared, and breaks in the lateral portion appeared. The formation of epitheliomesenchymal contacts and basal cytoplasmic blebs in the epithelial cells of the regressing paramesonephric duct coincided with the disappearance of the basement-membrane material in the condensed periductal mesenchyme. The asymmetric regression of the male paramesonephric duct was initiated in the immature medial side. The changes in the periductal matrix are indications of basic differences in the regulation of the development and regression of the genital ducts in different sexes.
Disciplines :
Biochemistry, biophysics & molecular biology
Anatomy (cytology, histology, embryology...) & physiology
Author, co-author :
Paranko, J.
Foidart, Jean-Michel ;  Université de Liège - ULiège > Département des sciences cliniques > Gynécologie - Obstétrique
Pelliniemi, L. J.
Language :
English
Title :
Basement membrane in differentiating mesonephric and paramesonephric ducts of male and female rat fetuses.
Publication date :
1985
Journal title :
Differentiation: Research in Biological Diversity
ISSN :
0301-4681
eISSN :
1432-0436
Publisher :
Blackwell Publishing, Oxford, United Kingdom
Volume :
29
Issue :
1
Pages :
39-49
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 24 March 2011

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