title: c-fos- and c-jun-like mRNA expression in frog (Rana esculenta) testis during the annual reproductive cycle.
abstract: The expression of c-fos and c-jun mRNA has been examined in the testis of a seasonal breeder (the frog, Rana esculenta) during the annual reproductive cycle, using Northern blot analysis along with measurements of plasma levels of estradiol-17 beta and androgens (testosterone + 5 alpha-dihydrotestosterone). A c-fos-like transcript of 1.9 kb was revealed using a 1.1-kb v-fos probe, while three different transcripts of 3.7, 3.4, and 2.7 kb were seen using 1.0-kb human (h)-c-jun fragment. The proto-oncogene-like mRNAs appear during the period of the year associated with the new wave of spermatogenic activity. The levels of fos-like mRNA were highest after the estradiol-17 beta peak, while low levels were concomitant with high androgen concentrations. It is concluded that there is a close correlation between c-fos- and c-jun-like expression and testicular activity in R. esculenta.
authors.affiliation: Dipartimento di Fisiologia Umana e Funzioni Biologiche Integrate F. Bottazzi, Napoli, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Cobellis
authors.forename: R
authors.initials: R
authors.lastname: Pierantoni
authors.forename: S
authors.initials: S
authors.lastname: Fasano
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D015152:Blotting, Northern; D008297:Male; D000090063:Proto-Oncogene Mas; D016760:Proto-Oncogene Proteins c-fos / Q000235:genetics*; D016755:Proto-Oncogene Proteins c-jun / Q000235:genetics*; D012333:RNA, Messenger / Q000096:biosynthesis*; D011893:Rana esculenta / Q000378:metabolism*; D012098:Reproduction / Q000502:physiology*; D012621:Seasons; D013737:Testis / Q000378:metabolism
chemical_list: C000715470:MAS1 protein, human; D000090063:Proto-Oncogene Mas; D016760:Proto-Oncogene Proteins c-fos; D016755:Proto-Oncogene Proteins c-jun; D012333:RNA, Messenger