RT Journal Article SR Electronic T1 PKCα Suppresses 7,12-Dimethylbenz[a]anthracene-induced Skin Tumor Formation JF Anticancer Research JO Anticancer Res FD International Institute of Anticancer Research SP 3097 OP 3101 VO 32 IS 8 A1 TAKESHI HARA A1 SHOJI MATSUMURA A1 FUMIHIKO HAKUNO A1 SHIN-ICHIRO TAKAHASHI A1 KAZUHIRO CHIDA YR 2012 UL http://ar.iiarjournals.org/content/32/8/3097.abstract AB Background: Protein kinase C (PKC)α is distributed in almost all tissues and participates in various signaling pathways. However, the role of PKCα in carcinogenesis remains unclear. In this study, we performed complete skin carcinogenesis in PKCα knockout mice by repeated administration of 7,12-dimethylbenz[a]anthracene (DMBA). Materials and Methods: Complete skin carcinogenesis was performed by repeated DMBA treatment using PKCα knockout mice. The number of tumors was determined weekly. Tumor types were determined by Hematoxylin and eosin (H & E) analysis. Tumor growth was assayed by proliferating cell nuclear antigen (PCNA) staining. Results: In the knockout mice, the average number of tumors was 16.6/mouse at 20 weeks. In contrast, in the wild-type (WT) mice, the tumor number was 6.9/mouse. Growth and malignant grade of tumors in PKCα knockout mice did not differ from those in WT mice. Conclusion: PKCα suppresses tumor formation, but not tumor growth and progression in skin carcinogenesis.