Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:3.6.3.44 (P-glycoprotein)
 13,344 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The purpose of this study was to investigate the prognostic effects of four biological markers, BCL2, TP53, Ki-67, and P-glycoprotein, and their possible clinical relevance in addition to the international prognostic index (IPI) in diffuse large B-cell lymphoma (DLBCL). A total of 405 patients with aggressive lymphoma, stage II-IV, between 18 and 67 years, were randomized in a trial comparing CHOP (cyclophosphamide, doxorubicin, vincristine, and prednisone) with MACOP-B (methotrexate, doxorubicin, cyclophosphamide, vincristine, prednisone, and bleomycin). Of these, 267 cases were classified as DLBCL, with adequate paraffin blocks available in 207 cases, enabling immunohistochemical assessment of the expression of BCL2, TP53, P-glycoprotein, and Ki-67. In a multivariate analysis, stratified for IPI, high BCL2 expression (>10%) low (<60%) expression of Ki-67, and high TP53 protein expression (>75%) were shown to provide additional prognostic information with regard to overall or failure-free survival. We found no association between expression of P-glycoprotein and outcome. Assessment of BCL2 positivity might be introduced as part of the routine investigation in patients with DLBCL, but further studies are necessary to confirm the clinical relevance of Ki-67 and TP53 expression.
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PMID:Assessment of biological prognostic factors provides clinically relevant information in patients with diffuse large B-cell lymphoma--a Nordic Lymphoma Group study. 1508 85

Natural killer (NK) cell lymphomas are rare malignancies. They are classified as extranodal NK/T-cell lymphoma, nasal type, and aggressive NK cell leukemia. NK cell neoplasms are prevalent in Asian and South American populations, but are extremely rare in the West. They can be classified clinically into nasal, non-nasal, and aggressive lymphoma/leukemia subtypes. For nasal NK cell lymphomas, combined chemotherapy and radiotherapy are indicated for stage I/II disease. Chemotherapy is the main treatment for stage III/IV nasal NK cell lymphomas, as well as the non-nasal and aggressive subtypes. Regimens containing drugs not affected by the P-glycoprotein, particularly in combination with L-asparaginase, have resulted in much improvement in treatment outcome for high-risk, refractory or relapsed patients. Autologous or allogeneic hematopoietic stem cell transplantation should be considered for selected patients. Epstein-Barr virus DNA load as a surrogate marker for prognostication, and clinical stratification of patients should be incorporated in clinical management algorithms.
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PMID:The diagnosis and management of extranodal NK/T-cell lymphoma, nasal-type and aggressive NK-cell leukemia. 2162 57