Expressão do P16 e do PDGFR-Beta no adenocarcinoma gástrico / Expression of P16 and PDGFR-Beta in gastric adenocarcinoma

OBJETIVO: Detectar a expressão imunoistoquímica do p16 e do PDGFR-beta no adenocarcinoma gástrico. MÉTODOS: Foram estudados 36 pacientes submetidos a cirurgia para adenocarcinoma gástrico entre 1998 e 2002 no Hospital da Santa Casa de Porto Alegre. As variáveis investigadas foram: idade, sexo, tamanho e localização do tumor, número de linfonodos dissecados, número de linfonodos metastáticos, tipo histológico, extensão da ressecção cirúrgica e estadiamento patológico. RESULTADOS: Não foi detectada expressão do PDGFR-beta nas peças cirúrgicas. Em relação ao p16, detectou-se perda de expressão menor que 10 por cento e menor que 1 por cento respectivamente em 89 por cento e 79 por cento das peças estudadas. CONCLUSÃO: Não houve correlação entre a perda de p16 e as variáveis estudadas.

OBJECTIVES: To detect immunohistochemistry expression of p16 and PDGFR-beta on gastric adenocarcinoma. METHODS: Thirty six patients submitted to surgery for gastric adenocarcinoma between 1998 and 2002 at Santa Casa de Porto Alegre Hospital have been studied. Variables investigated were: age, gender, tumour size and localization, number of dissected and metastatic nodes, histological type, surgical resection extension and pathological staging. RESULTS: No expression of PDGFR-beta has been detected on surgical specimens. Concerning to p16, loss of expression lower than 10 percent and 1 percent has been detected respectively on 89 percent and 79 percent of the specimens studied. CONCLUSION: There has been no correlation among p16 loss and variables studied.

A preliminary study on the changes of expression of PDGF-beta, PDGFR-beta, TGF-beta 1, TGFR, bFGF and its relationship with the wound age in wound healing / 法医学杂志

OBJECTIVE@#To explore the relationship between the expression change of cytokines and the wound age during the healing process of rats skin wound.@*METHODS@#Immunohistochemical and image-analysis methods were performed on vital skin wounds(after incision 0.5-168 h am) and postmortem damage(after incision 0.5-6 h pm).@*RESULTS@#The expression of the cytokines PDGF-beta, PDGFR-beta, TGF-beta 1, and bFGF in the epithelial cells was already enhanced since 0.5 h am after damage and their strongest expression reaction was seen at 24-96 h am. In addition, the expression of PDGF-beta, PDGFR-beta, TGF-beta 1 and bFGF was also found in the macrophages and the fibroblasts of the granulation tissue, and the expression changes in the postmortem damage group showed that the skin tissue within 0.5-3 h after incision showed immunohistochemical changes but weakly expression and 3 h thereafter no any change was found.@*CONCLUSION@#The expression characteristics of the above mentioned cytokines in wound repair should be related to the wound age and it reminds therefore that they may be used as immunohistochemical criteria for accurate determining the wound age.