Immunohistochemistry of Canine Hair Follicle Stem Cells (cHFSCs) by using CK15 and CK19

Adult body harbors powerful reservoir of stem cells that maintains homeostasis by tissue regeneration and in response to disease and injury. Hair follicle is a dynamic mini organ supporting important biological functions of the body in maintaining homeostasis and skin tissue self-renewal. This study was carried out with the objective of finding the adult stem cells in canine hair follicular tissue. To conduct this study, adult canine skin samples (n=12) irrespective of breed and sex were collected. To characterize the hair follicle stem cells, paraffin sections of canine hair follicles were immunostained with positive hair follicle stem cell markers like Anti- cytokeratin 15 (CK15) and Anti-cytokeratin 19 (CK19) and FITC conjugated and HRP conjugated secondary antibodies were used. Immunoreactivities for CK15 and CK19 were observed in the bulge/isthmus region of hair follicles in between the infundibulum and suprabulbar regions and occupied most part of the peripheral layer of outer root sheath cell. Immunophenotyping of canine Hair Follicle Stem Cells (cHFSCs) in the bulge region of hair follicle helps in confirmation of in vitro culture of cHFSCs from the bulge region which will be further used for translational research

Expression of CK14 and CK15 in esophageal squamous cell carcinoma and its significance / 肿瘤研究与临床

Objective To observe the expression of cytokeratin 14,15 (CK14,CK15) expression level in normal esophageal tissues and esophageal squamous cell carcinoma tissues of different differentiation degree and to analyze the relationship between occurrence,development of esophageal squamous cell carcinoma and CK14,CK15 expression level.Methods Esophageal squamous epithelial tissue from 55 cases of carcinoma tissues and 55 cases of adjacent tissues were collected.Immunohistochemical method was used to compare CK14,CK15 and PCNA expression levels in esophageal squamous carcinoma.Results Expression positive rates of CK14,CK15 and PCNA in esophageal squamous carcinoma were 72.7 ％ (40/55),63.6 ％ (35/55) and 65.5 ％ (36/55),respectively,and PCNA expression was correlated with CK14 or CK15 expression (C =0.585,P ＜ 0.001; C =0.405,P ＜ 0.001).CK14 and CK15 levels were higher in high differentiation carcinoma tissue than those in low differentiation carcinoma tissue,and PCNA expression level was increased in low differentiated carcinoma tissue.CK14,CK15 and PCNA were expressed located in base layer of esophageal squamous epithelial adjacent to carcinoma tissue,and their expression positive rates were 56.4 ％ (31/55),52.7 ％ (29/55) and 56.4 ％ (31/55).CK14 and CK15 levels were higher in esophageal squamous epithelial tissues of far-cut edge than those in tissues of near-cut edge (intraepithelial neoplasia).There were no associations between CK14,CK15 expression and the clinical parameters (P ＞ 0.05).Postoperative survival time in patients with CK14 or CK15 positive expression was shorter than that of patients with negative expression (P ＜ 0.05).Conclusions CK14 or CK15 positive expressions localized to base layer of esophageal squamous epithelial adjacent to carcinoma tissue may play some roles in generation and differentiation of esophageal squamous cell cancer.CK14 or CK15 positive expression in esophageal squamous carcinoma involves in differentiation process.Joint detection of CK14 and CK15 expression has clinical application value for early diagnosis,the degree of differentiation and prognostic judgment in esophageal squamous carcinoma.