ABSTRACT
Objective To study the relation between the expression of P130 Crk-associated substrate (P130Cas),phosphatase and tensin homolog (PTEN)and the epithelial-mesenchymal transition (EMT) of skin scar carcinoma.Methods Tissues of skin scar carcinoma,scar and normal skin were collected from 8 patients who were pathologically diagnosed as skin scar carcinoma with high differentiated squamous cell carcinoma.The expression of PTEN,P130Cas,E-cadherin and Vimentin in normal skin,skin scar and skin scar carcinoma tissues were detected by immunohistochemical method of S-P.Results The expression of PTEN,P130Cas and E-cadherin in normal skin,scar and skin scar carcinoma tissues were all significantly different (P ＜ 0.05).The expression of Vimentin in skin scar carcinoma tissues were significantly increased than that in normal skin and skin scar tissues,but there was no statistically significance difference between skin scar tissues and normal skin (P ＞ 0.05).The expression of PTEN in skin scar carcinoma tissues was negatively correlated with P130Cas (r =-0.78,P =0.023) and positively correlated with E-cadherin (r =0.83,P =0.011),but there were no correlation between PTEN and Vimentin (P ＞ 0.05);The expressions of P130Cas in skin scar carcinoma tissues was negatively correlated with Ecadherin (r =-0.74,P =0.035),but there were no statistically significant correlation between P130Cas and Vimentin (P＞0.05).Conclusions Both PTEN and P130Cas involved in the EMT process of skin scar carcinoma and may be an important mechanism in scar carcinogenesis.
ABSTRACT
Objective@#To investigate the effect of different negative pressure of wound negative pressure dressing (NPD) on the survival of full-thickness skin grafts of patients.@*Methods@#One hundred and eleven patients who need skin grafting, conforming to the inclusion criteria were hospitalized in our unit from August 2012 to March 2017, and their clinical data were retrospectively analyzed. Forty-seven patients hospitalized from August 2012 to October 2015 were assigned into traditional treatment group. Sixty-four patients hospitalized from November 2015 to March 2017 were divided into -9.975 kPa negative pressure treatment group (n=34) and -13.300 kPa negative pressure treatment group (n=30). Patients in traditional treatment group received conventional dressing after full-thickness skin grafting. Patients in -9.975 kPa and -13.300 kPa negative pressure treatment groups received -9.975 kPa and -13.300 kPa NPD based on traditional treatment after vacuum sealing, respectively. Dot necrosis area of skin grafts and erosion and escharosis of graft edges of patients in the three groups on post operation day 10 were observed. The percentage of dot necrosis area of skin grafts and occurrence rate of erosion and escharosis of skin graft edges were calculated, respectively. Data were processed with chi-square test, Fisher′s exact test, and Kruskal-Wallis H test.@*Results@#Percentages of dot necrosis area of skin grafts of patients in traditional treatment group and -9.975 kPa and -13.300 kPa negative pressure treatment groups were 17.81%, 3.20%, and 3.00%, respectively. Percentage of dot necrosis area of skin grafts of patients in traditional treatment group was significantly higher than that in -9.975 kPa and -13.300 kPa negative pressure treatment groups (Z=-5.770, -4.690, P<0.001). Percentages of dot necrosis area of skin grafts of patients in -9.975 kPa and-13.300 kPa groups were close (Z=-0.619, P>0.05). The occurrence rates of erosion and escharosis of skin graft edges of patients in traditional treatment group and -9.975 kPa and -13.300 kPa negative pressure treatment groups were 78.7% (37/47), 32.4 (11/34), and 36.7% (11/30), respectively. Erosion and escharosis of skin graft edges of patients in -9.975 kPa and -13.300 kPa negative pressure treatment groups were better than those in traditional treatment group (P<0.001). Erosion and escharosis of skin graft edges of patients in -9.975 kPa and -13.300 kPa negative pressure treatment groups were close (P>0.05).@*Conclusions@#The use of -9.975 kPa and -13.300 kPa NPD in skin grafts after full-thickness skin grafting significantly diminishes the occurrence rates of dot necrosis area of skin grafts and erosion and escharosis of graft edges.