In VitroBiosynthesis of Androgens in the Australian Lungfish,Neoceratodus forsteri

A Comparative View on Sex Differentiation and Gametogenesis Genes in Lungfish and Coelacanths

“…3 , Supplementary Material online). The absence of expression in the gonads of these two species is in line with the results of a previous study, which failed to detect 11-ketotestosterone in Australian lungfish ( Joss et al. 1996 ).…”

Pheromones, attractants and other chemical cues of aquatic organisms and amphibians

“…The male Australian lungfish has a varying concentration of testosterone which correlates with spermatogenesis, together with smaller amounts of glucuronides of testosterone and androstenedione in the spawning season. 133 The following are not strictly within the subject matter of this review but because of the importance of these fish, the references are included. The coelacanth contains vasotocin and mesotocin genes like non-mammalian tetrapods (the regulatory function of these peptides in the coelacanth is not known).…”

Patterns of peripheral steroid metabolism vary with sex, season, and tissue type in blotched blue-tongued lizards (Tiliqua nigrolutea)

“…Although not peripheral tissue, gonadal tissue from each sex was included, because of the potential for postbiosynthetic modiWcation of primary gonadal steroids (Cuevas et al, 1992;Joss et al, 1996;Scott and Vermeirssen, 1994). Yolk was expressed from all vitellogenic follicles, and follicles were rinsed with incubation medium prior to incubation.…”

“…In vitro derivatisation and/or conjugation of steroids have, indeed, been observed in a wide variety of vertebrate body tissues including muscle (birds: Fennell and Scanes, 1992a,b), skin (Wsh: Pottinger and Pickering, 1985), brain (birds: Schlinger et al, 1989;Schlinger and Callard, 1990;reptiles: Callard et al, 1977), gonads and/ or fat bodies (lungWsh: Joss et al, 1996;amphibians: Lupo Di Prisco et al, 1971, 1972mammals: Folman et al, 1973), blood (Wsh: Schulz, 1986;mammals: Milewich et al, 1982), and liver (Wsh: Kime and Saksena, 1980;Snowberger and Stegeman, 1987;mammals: Payne, 1980). Moreover, in vitro and in vivo studies of vertebrate steroid metabolism have demonstrated variations in the patterns of production of conjugates and derivatives according to the reproductive condition of the animal (Borg et al, 1992;Kime, 1987;Ozon and Fouchet, 1972;Schlinger et al, 1989).…”