School of Medicine Publications and Presentations
Document Type
Article
Publication Date
7-2019
Abstract
T-cell protein tyrosine phosphatase (TC-PTP, encoded by PTPN2) is a non-receptor PTP that is mostly highly expressed in hematopoietic tissues. TC-PTP modulates a variety of physiological functions including cell cycle progression, cell survival and proliferation, and hematopoiesis through tyrosine dephosphorylation of its target substrates, such as EGFR, JAK1, JAK3, STAT1, and STAT3. Studies with whole or tissue-specific loss of TC-PTP function transgenic mice have shown that TC-PTP has crucial roles in the regulation of the immune response, insulin signaling, and oncogenic signaling. More recently, generation of epidermal-specific TC-PTP-deficient mice for use in multistage skin carcinogenesis bioassays demonstrated that TC-PTP suppresses skin tumor formation by negatively regulating STAT3 and AKT signaling. Further investigation showed that TC-PTP also minimizes UVB-induced epidermal cell damage by promoting apoptosis through the negative regulation of Flk-1/JNK signaling. These findings provide major evidence for a tumor suppressive function for TC-PTP against environment-induced skin cancer. Here, we will discuss TC-PTP, its substrates, and its functions with an emphasis on its role in skin carcinogenesis.
Recommended Citation
Morales, L. D., Archbold, A. K., Olivarez, S., Slaga, T. J., DiGiovanni, J., & Kim, D. J. (2019). The role of T-cell protein tyrosine phosphatase in epithelial carcinogenesis. Molecular carcinogenesis, 58(9), 1640–1647. https://doi.org/10.1002/mc.23078
Publication Title
Molecular carcinogenesis
DOI
10.1002/mc.23078
Academic Level
faculty
Mentor/PI Department
Immunology and Microbiology
Comments
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