RGD Reference Report - Characterization and cellular localization of PSG in rat testis. - Rat Genome Database

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Characterization and cellular localization of PSG in rat testis.

Authors: Blomberg, LA  Wu, SM  Dirami, G  Dym, M  Chou, JY  Chan, WY 
Citation: Blomberg LA, etal., Mol Cell Biochem 1997 Dec;177(1-2):229-37.
RGD ID: 1299603
Pubmed: PMID:9450667   (View Abstract at PubMed)

In order to establish the rat testis as a model system for studying the human pregnancy-specific beta1-glycoprotein (PSG), expression and cellular distribution of PSG in rat testis were examined. Three partial PSG cDNAs, namely, rnCGM6, rnGCM7, and rnCGM8 were obtained when rat testis cDNA libraries were screened with a human placental PSG cDNA probe. Unlike the human PSGs, the rat PSGs show less nucleotide and amino acid sequence homology among family members. The rat PSGs also have multiple truncated leader sequences followed by immunoglobulin variable-like N domains while human PSGs have a single N domain. Examination of the testis, intestine, kidney, liver, lung, and muscle of male rats by reverse transcription-polymerase chain reaction (RT-PCR) with nested gene-specific primers showed that rnCGM6 was present only in the testis, while rnCGM8 was present in the testis, intestine and lung. On the other hand rnCMG7 was found in all tissues examined. Furthermore, rnCGM7 transcript was present in all somatic cells examined whereas rnCGM6 was predominantly in myoid cells and rnCMG8 in Leydig cells. These results suggest that there is cell-specificity in the expression of PSGs in the rat testis and that the rat testis is a good model for studying the biological activities of the PSGs.

Objects referenced in this article
Gene Ceacam11 CEA cell adhesion molecule 11 Rattus norvegicus
Gene Psgb1 pregnancy-specific beta 1-glycoprotein Rattus norvegicus

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