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Roles of Cyclophilins in Cancers and Other Organ Systems

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Abstract

Cyclophilins are originally identified as cellular binding proteins for the immunosuppressive drug cyclosporin A. Many cyclophilins, including CypA, CypB, CypC, CypD, and Cyp40, have been discovered and shown to be ubiquitously distributed in many types of cells and organ systems. Recent investigations have uncovered many important properties and functions for cyclophilins including peptidyle-prolyl-isomerase activity and protein folding/repair; maintaining mitochondrial functions and involvement in apoptosis; roles in regulation of T-cell function and inflammation; interaction with CD147; and pathogenesis of vascular disease, human immunodeficiency virus infection, and rheumatoid arthritis. Furthermore, the expression and functions of cyclophilins may be correlated with tumor biology of several types of cancers including pancreatic carcinoma. Molecular mechanisms of cyclophilin-mediated biologic events and future directions of research are discussed in this review. Understanding the roles of cyclophilins in cancers and other organ systems will be crucial in determining clinical applications for the treatment or diagnosis of human diseases.

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Acknowledgments

This work was supported by National Institutes of Health grants R01 HL61943 (C.C.), R01 HL60135 (C.C.), R01 HL65916 (C.C.), R01 HL72716 (C.C.), R01 EB-002436 (C.C.), Methodist 39935 (M.L.), K08 CA85822 (W.F.), R13 CA101889 (F.C.B.), R21 AI 49116 (Q.Y.), and R01 DE015543 (Q.Y.).

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Yao, Q., Li, M., Yang, H. et al. Roles of Cyclophilins in Cancers and Other Organ Systems. World J. Surg. 29, 276–280 (2005). https://doi.org/10.1007/s00268-004-7812-7

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