Expression of FTZ-F1alpha in frog testicular cells.
Fushi tarazu transcription factor-1 (FTZ-F1), a member of a nuclear hormone receptor superfamily, is a transcriptional regulator for fushi tarazu gene expression in Drosophila (Ueda et al., '90). We have cloned a homologue (rrFTZ-F1alpha) of the FTZ-F1 gene of the frog Rana rugosa. The gene, in frogs, has been shown to have high expression level in the testis (Nakajima et al., 2000). In this study, the RT-PCR analysis showed that the FTZ-F1alpha mRNA level in adult frogs did not change throughout the year, even during hibernation. However, when immunohistological studies using the anti-rrFTZ-F1alpha antibody were employed to examine which testicular cells expressed this gene, Sertoli cells were found to produce rrFTZ-F1alpha in the two seasons: the breeding season (from March through May) and the pre-hibernating season (from October through November). Interstitial cells, however, did it in only the breeding season (from April through May). Taken together, the results suggest that the rrFTZ-F1alpha expression is regulated at the post-transcriptional step, and that the rrFTZ-F1alpha may play an important role(s) in the seasonal activities of Sertoli and interstitial cells in the frog testis. J. Exp. Zool. 290:182-189, 2001.
Takase
M
M
Laboratory for Amphibian Biology, Faculty of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
Nakajima
T
T
Nakamura
M
M
D000818:Animals; D000906:Antibodies / Q000276:immunology; D015153:Blotting, Western; D004268:DNA-Binding Proteins / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology; D051717:Fushi Tarazu Transcription Factors; D015870:Gene Expression; D018398:Homeodomain Proteins; D007150:Immunohistochemistry; D008297:Male; D011898:Ranidae; D018160:Receptors, Cytoplasmic and Nuclear; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012621:Seasons; D054339:Steroidogenic Factor 1; D013737:Testis / Q000166:cytology / Q000378:metabolism*; D014157:Transcription Factors / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology
D000906:Antibodies; D004268:DNA-Binding Proteins; D051717:Fushi Tarazu Transcription Factors; D018398:Homeodomain Proteins; D018160:Receptors, Cytoplasmic and Nuclear; D054339:Steroidogenic Factor 1; D014157:Transcription Factors