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- W1973434320 abstract "MDM2 and p53 immunohistochemical protein expression was analysed in lymphocytes and in reactive and neoplastic lymphoid tissue. Phytohaemagglutinin (PHA)-stimulated lymphocytes displayed MDM2 and p53 co-expression. In 8 of 8 tonsils, 24 of 24 Hodgkin's disease (HD), and 10 of 24 high-grade non-Hodgkin's lymphoma (HG-NHL) specimens, MDM2 paralleled p53 nuclear expression in non-tumour and tumour cells. The number of positive cells was greater and the staining intensity was stronger for p53 than for MDM2. In another nine of the 24 HG-NHL cases studied, dissociated expression was observed, with high p53 expression and very low or absent MDM2 expression. In five cases, both MDM2 and p53 were negative. The eight low-grade NHL (LG-NHL) cases were also MDM2- and p53-negative. MDM2 and p53 expression in PHA-activated lymphocytes and reactive lymphoid tissue is probably an expression of opposing biological signals regulating cell proliferation. Parallel MDM2 and p53 expression in all HD and in 10 out of 24 HG/NHL cases may indicate that this growth suppressive pathway is maintained in those cases. However, dissociated MDM2/p53 expression (nine cases) and the absence of expression of both proteins (five cases) may represent examples of deregulation of this growth control pathway. These findings are in agreement with previous in vitro studies in cell lines regarding the role of MDM2/p53 lymphoid tissue, suggesting a possible role for MDM2 deregulation in lymphomagenesis." @default.
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- W1973434320 date "1995-09-01" @default.
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- W1973434320 title "MDM2 expression in lymphoid cells and reactive and neoplastic lymphoid tissue. Comparative study with p53 expression" @default.
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- W1973434320 doi "https://doi.org/10.1002/path.1711770106" @default.
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