| First Author | Koppel AC | Year | 2014 |
| Journal | Am J Physiol Cell Physiol | Volume | 306 |
| Issue | 10 | Pages | C899-909 |
| PubMed ID | 24598361 | Mgi Jnum | J:211002 |
| Mgi Id | MGI:5573014 | Doi | 10.1152/ajpcell.00331.2013 |
| Citation | Koppel AC, et al. (2014) Delayed skin wound repair in proline-rich protein tyrosine kinase 2 knockout mice. Am J Physiol Cell Physiol 306(10):C899-909 |
| abstractText | Proline-rich protein tyrosine kinase 2 (Pyk2) is a member of the focal adhesion kinase family. We used Pyk2 knockout (Pyk2-KO) mice to study the role of Pyk2 in cutaneous wound repair. We report that the rate of wound closure was delayed in Pyk2-KO compared with control mice. To examine whether impaired wound healing of Pyk2-KO mice was caused by a keratinocyte cell-autonomous defect, the capacities of primary keratinocytes from Pyk2-KO and wild-type (WT) littermates to heal scratch wounds in vitro were compared. The rate of scratch wound repair was decreased in Pyk2-KO keratinocytes compared with WT cells. Moreover, cultured human epidermal keratinocytes overexpressing the dominant-negative mutant of Pyk2 failed to heal scratch wounds. Conversely, stimulation of Pyk2-dependent signaling via WT Pyk2 overexpression induced accelerated scratch wound closure and was associated with increased expression of matrix metalloproteinase (MMP)-1, MMP-9, and MMP-10. The Pyk2-stimulated increase in the rate of scratch wound repair was abolished by coexpression of the dominant-negative mutant of PKCdelta and by GM-6001, a broad-spectrum inhibitor of MMP activity. These results suggest that Pyk2 is essential for skin wound reepithelialization in vivo and in vitro and that it regulates epidermal keratinocyte migration via a pathway that requires PKCdelta and MMP functions. |
