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Ptpn14 Knockout Mice Reveal Critical Female-Specific Roles for the Hippo Pathway

McCrea, E. M.; Makrides, N.; Tabata, T.; Vogel, H.; Howitt, B.; Reineking, W.; Vilches-Moure, J. G.; Wang, M.; Zhang, X.; Attardi, L. D.

2025-01-13 developmental biology
10.1101/2025.01.13.632464 bioRxiv
Show abstract

The Hippo pathway regulates many physiological processes, including development, tumor suppression, and wound healing. One understudied Hippo pathway component is PTPN14, an evolutionarily conserved tyrosine-phosphatase that inhibits YAP/TAZ. While an established tumor suppressor, PTPN14s role in tissue homeostasis has remained unclear. We thus generated Ptpn14-deficient mice and found that only [~]60% of Ptpn14-/- mice survived postnatally, highlighting the importance of PTPN14 for viability, while also enabling the discovery of PTPN14 physiological functions. Ptpn14-/-mice developed debilitating corneal lesions and the uterus defect, hydrometra, as well as heart and kidney abnormalities. Ptpn14-deficiency precipitated an impaired injury response in the cornea and dysregulated YAP signaling in the uterus. Notably, these phenotypes were female-specific, revealing sexually-dimorphic Hippo pathway function through PTPN14. Finally, analysis of human PTPN14 variants suggested that PTPN14s essential roles are conserved in humans, underscoring the importance of our insights for designing therapies to improve womens health.

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