Journal article
Cellular localization of fibronectin gene expression in the seminiferous tubule
Molecular and cellular endocrinology, Vol.66(1), pp.45-52
1989
Handle:
https://hdl.handle.net/2376/110522
PMID: 2684705
Abstract
The cellular location of fibronectin expression within the seminiferous tubule was investigated in order to better understand testicular cell functions and cell-cell interactions. Peritubular cells were shown to actively synthesize and secrete fibronectin in culture by the detection of a radiolabeled 220 kDa secreted protein that is immunologically similar to fibronectin and by the quantitation of fibronectin in peritubular cell conditioned medium with a fibronectin enzyme-linked immunosorbent assay. Sertoli cells did not produce detectable levels of fibronectin when assayed by either of these procedures. A 6.5 kb fibronectin messenger RNA was detected in freshly isolated or cultured peritubular cells, but no fibronectin gene expression was detected in Sertoli cells or developing germinal cells. Combined results imply that the peritubular cells are the only apparent site of fibronectin expression within the seminiferous tubule. During the development of the testis the levels of fibronectin expression increased to a maximum at early puberty (15-day-old rats) and then slowly declined. The results demonstrate that fibronectin can be utilized as a unique functional and biochemical marker for peritubular cells when compared to other cell types in the seminiferous tubule. Production of fibronectin by peritubular cells provides an example of the ability of peritubular cells and Sertoli cells to cooperate in the production of individual components of the basement membrane of the seminiferous tubule. This cellular interaction is an example of a mesenchymal/ stromal-epithelial interaction which is postulated to be important for the physiology of many tissues.
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Details
- Title
- Cellular localization of fibronectin gene expression in the seminiferous tubule
- Creators
- Michael K Skinner - Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, TN 37232 U.S.ABarbara Stallard - Program of Biochemistry /Biophysics, Washington State University, Pullman, WA 99164-4660 U.S.ACatherine Tananis Anthony - Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, TN 37232 U.S.AMichael D Griswold - Program of Biochemistry /Biophysics, Washington State University, Pullman, WA 99164-4660 U.S.A
- Publication Details
- Molecular and cellular endocrinology, Vol.66(1), pp.45-52
- Academic Unit
- Biological Sciences, School of; Molecular Biosciences, School of
- Publisher
- Elsevier Ireland Ltd
- Identifiers
- 99900547398601842
- Language
- English
- Resource Type
- Journal article