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Lats2/Kpm is required for embryonic development, proliferation control and genomic integrity
John Peter McPherson1, Laura Tamblyn, Andrew Elia
1Division of Cellular & Molecular Biology, Department of Medical Biophysics, Ontario Cancer Institute, University of Toronto, Toronto, Ontario, Canada.
The EMBO Journal
|September 3, 2004
Summary
The tumor suppressor LATS2 is crucial for embryonic development, preventing overgrowth and maintaining genomic stability by regulating centrosome duplication. Loss of LATS2 leads to defects in cell proliferation and mitotic fidelity.
Area of Science:
- Cell Biology
- Developmental Biology
- Genetics
Background:
- The Drosophila melanogaster warts/lats tumor suppressor has mammalian homologs LATS1 and LATS2.
- LATS2 plays a role in cell cycle regulation and tumor suppression.
Purpose of the Study:
- To investigate the function of mammalian Lats orthologues, specifically LATS2, during embryonic development.
- To determine the role of LATS2 in cell proliferation, contact inhibition, and genomic stability.
Main Methods:
- Analysis of Lats2 knockout mouse embryos and mouse embryonic fibroblasts (MEFs).
- Assessment of embryonic lethality, tissue-specific overgrowth, cell proliferation, and cytokinesis.
- Evaluation of centrosome duplication, genomic instability, and LATS2 localization.
Main Results:
- Lats2 knockout embryos exhibit mesodermal overgrowth and embryonic lethality by day 12.5, with defective proliferation.
- Lats2(-/-) MEFs show increased growth, loss of contact inhibition, defective cytokinesis, centrosome amplification, and genomic instability.
- LATS2 localizes to centrosomes and suppresses centrosome overduplication.
Conclusions:
- LATS2 is essential for maintaining the integrity of centrosome duplication and mitotic fidelity.
- LATS2 plays a critical role in preventing genomic instability during embryonic development.
- Defects in LATS2 function lead to uncontrolled cell growth and developmental abnormalities.