2003•Molecular and Cellular BiologyOpen access

Role of Plk2 ( Snk ) in Mouse Development and Cell Proliferation

Sheng Ma, Jean Charron, Raymond L. Erikson

Abstract

Plk2 (Snk) is a polo-like kinase expressed at G(1) in cultured cells and mainly in the hippocampal neurons in the brains of adult rodents, but its function is poorly understood. We have generated mice deficient in Plk2 by gene targeting. Although Plk2 is not required for postnatal growth, Plk2(-/-) embryos show retarded growth and skeletal development late in gestation. The labyrinthine zone of the placenta is diminished in Plk2(-/-) embryos due to decreased cell proliferation. Cultured Plk2(-/-) embryonic fibroblasts grow more slowly than normal cells and show delayed entry into S phase. These data suggest a role for Plk2 in the cell cycle.

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Key concepts: Biology, Cell growth, Cell biology, Embryo, Cell cycle, Kinase, Embryonic stem cell, Embryogenesis