Expression of oncogenic molecules in primary central nervous system lymphomas in immunocompetent patients
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1970
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Abstract
We studied overexpression of p53, Bcl-2, Bcl-6, c-Myc and Mdm2 proteins by immunohistochemistry for a total of 27 primary central nervous system B cell lymphomas (CNS lymphomas) in immunocompetent patients and one CNS lymphoma in an AIDS patient. The expression of Epstein-Barr (EB) virus-encoded small RNA-1 (EBER-1) was also analysed using in situ hybridisation. Overexpression (more than 20% of cells stained) of p53 protein was detected in 8 of 27 immunocompetent cases (30%); 6 cases showed a nuclear stain and 2 cases showed cytoplasmic stain (nuclear exclusion). Strong Bcl-2 or Bcl-6 immunoreactivity suggestive of overexpression was seen, respectively, in 5 (19%) and 6 (22%) cases; 2 cases were positive for both immunoreactivities. Interestingly, overexpression of Bcl-2 or Bcl-6 was not seen in the cases which showed p53 overexpression (P < 0.03; chi-square test). EBER-1 expression was not detected in any of the 27 immunocompetent cases, but was found in the AIDS-related CNS lymphoma, which also showed an overexpression of Bcl-6, but not Bcl-2. None of the cases showed c-Myc or Mdm2 overexpression. Taken together, it is suggested that CNS lymphoma in immunocompetent hosts is a distinct disease that has a different molecular profile from those of systemic lymphoma and/or AIDS-related CNS lymphoma.
| Reference Key |
nozaki1970actaexpression
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| Authors | Michimasa Nozaki;M. Tada;Yuzo Mizugaki;Kenzo Takada;Kazuo Nagashima;Yutaka Sawamura;Hiroshi Abe;Michimasa Nozaki;M. Tada;Yuzo Mizugaki;Kenzo Takada;Kazuo Nagashima;Yutaka Sawamura;Hiroshi Abe; |
| Journal | acta neuropathologica |
| Year | 1970 |
| DOI |
doi:10.1007/s004010050831
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| URL | |
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