Linked Life Data

7542612

Source:http://linkedlifedata.com/resource/pubmed/id/7542612

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1995-8-30
pubmed:abstractText
The cellular mechanisms controlling sexual differentiation of fetal gonads are poorly understood. By examining the protein and mRNA expression of tenascin-C in correlation with the immunocytochemical detection of alpha-smooth muscle actin (alpha-SMA) and basement membrane heparan sulfate proteoglycan (HSPG) we demonstrate a clear-cut sex-and development-dependent expression pattern of tenascin-C in the rat testis, ovary and mesonephros. Immunocytochemistry and in situ hybridization of tenascin-C in 15-day-pc fetal testis and ovary showed protein and mRNA accumulation within the mesenchyme of the mesogonadal connection. In addition to the male and female mesonephros, some labeling could also be seen within the testicular tunica albuginea and intraovarian mesenchymal septa. In the 17-day-pc testis abundant accumulation of tenascin mRNA and protein appeared in the tunica and mediastinum testis, but not at all in the intratesticular mesenchyme. A similar pattern was still seen in the newborns where, however, a decrease in the anti-tenascin immunoreactivity of the tunica and mediastinum could be demonstrated. In contrast to the testis, expression of tenascin in 17-day-pc ovaries was widespread within the hilus and the entire intragonadal mesenchyme where it continued to accumulate also in newborns. Northern blot analysis of tenascin-C mRNAs showed one message of 8.0 kb in the 15-day-pc male and female gonads. An additional weak signal of 6.5 kb was seen in the female mesonephros. In the 18-day-pc testis, the 6.5-kb signal appeared stronger than the 8.0-kb signal. In contrast to the testis, the 6.5-kb message was weak in the developing ovary where the 8.0-kb signal had an intense peak on the day 18 pc. Further, in the ovary, mesenchymal accumulation of HSPG coincided with the spatial distribution of tenascin. In the testicular tunica and in the mesenchyme of the male and female genital ducts expression of tenascin was parallel with the differentiation of smooth muscle tissue, detected by labeling for alpha-SMA, which also indicated the tenascin-negative myoid cells of the testis. Our results indicate that tenascin expression in the fetal rat internal genitalia is involved in the differentiation of smooth muscle cells but not intratesticular myoid cells. In the ovarian mesenchyme, tenascin-C may have a specific function in the dynamic remodeling of the ovarian cords.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0301-4681
pubmed:author
pubmed:issnType
Print
pubmed:volume
58
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
329-39
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed-meshheading:7542612-Actins, pubmed-meshheading:7542612-Animals, pubmed-meshheading:7542612-Basement Membrane, pubmed-meshheading:7542612-Cell Adhesion Molecules, Neuronal, pubmed-meshheading:7542612-Cell Differentiation, pubmed-meshheading:7542612-Embryonic and Fetal Development, pubmed-meshheading:7542612-Extracellular Matrix Proteins, pubmed-meshheading:7542612-Female, pubmed-meshheading:7542612-Fetal Proteins, pubmed-meshheading:7542612-Heparan Sulfate Proteoglycans, pubmed-meshheading:7542612-Heparitin Sulfate, pubmed-meshheading:7542612-Immunohistochemistry, pubmed-meshheading:7542612-In Situ Hybridization, pubmed-meshheading:7542612-Male, pubmed-meshheading:7542612-Ovary, pubmed-meshheading:7542612-Proteoglycans, pubmed-meshheading:7542612-RNA, Messenger, pubmed-meshheading:7542612-Rats, pubmed-meshheading:7542612-Rats, Sprague-Dawley, pubmed-meshheading:7542612-Sex Characteristics, pubmed-meshheading:7542612-Tenascin, pubmed-meshheading:7542612-Testis
pubmed:year
1995
pubmed:articleTitle
Sex-dependent expression of tenascin-C in the differentiating fetal rat testis and ovary.
pubmed:affiliation
Department of Anatomy, University of Turku, Finland.
pubmed:publicationType
Journal Article, Comparative Study