title: Intratesticular signals for progression of germ cell stages in vertebrates.
abstract: The mechanisms underlying the complexity of spermatogenesis and spermiogenesis have deeply been studied in recent years. Transgenic animals, gene-targeting techniques, and lower vertebrate animal models have led to the discovery of some of the intratesticular signals involved in germ cell progression. This review wish to give the state of the art about it with particular emphasis on the comparative approach.
authors.affiliation: Dipartimento di Medicina Sperimentale, II Università di Napoli, Via Costantinopoli, 16-80138 Naples, Italy.
authors.forename: Gilda
authors.initials: G
authors.lastname: Cobellis
authors.forename: Rosaria
authors.initials: R
authors.lastname: Meccariello
authors.forename: Riccardo
authors.initials: R
authors.lastname: Pierantoni
authors.forename: Silvia
authors.initials: S
authors.lastname: Fasano
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D005854:Germ Cells / Q000254:growth & development*; D008297:Male; D008540:Meiosis; D013091:Spermatogenesis / Q000502:physiology*; D013737:Testis / Q000502:physiology*; D014714:Vertebrates / Q000502:physiology*