Faculty Research 1990 - 1999

Title

Migration of mesonephric cells into the mammalian gonad depends on Sry.

Document Type

Article

Publication Date

1999

Keywords

Cell-Movement, DNA-Binding-Proteins, Embryonic-Induction, Gene-Expression-Regulation-Developmental, Gonads, Male, Mesonephros, Mice, Mice-Inbred-Strains, Mice-Transgenic, Organ-Culture, SUPPORT-U-S-GOVT-P-H-S, Testis, Y-Chromosome

JAX Source

Mech Dev 1999 Jun; 84(1-2):127-31.

Grant

GM56767/GM/NIGMS, GM20919/GM/NIGMS, CA34196/CA/NCI

Abstract

In mammals, the primary step in male sex determination is the initiation of testis development which depends on the expression of the Y-linked testis determining gene, Sry. The mechanisms by which Sry controls this process are unknown. Studies showed that cell migration from the adjacent mesonephros only occurs into XY gonads; however, it was not known whether this effect depended on Sry, another Y-linked gene, or the presence of one versus two X chromosomes. Here we provide genetic proof that Sry is the only Y-linked gene necessary for cell migration into the gonad. Cell migration from the mesonephros into the differentiating gonad is consistently associated with Sty's presence and with testis cord formation, suggesting that cell migration plays a critical role in the initiation of testis cord development. The induction of cell migration represents the earliest signaling pathway yet assigned to Sry.

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