title: p53, bcl-2 and bax abnormalities in non-Hodgkin's lymphomas of the head and neck.
abstract: In the present study, mutations or protein expression of p53, bcl-2 and bax are reported in 13 non-Hodgkin's B-cell lymphomas of the head and neck. Nine of 13 cases (69.2%) expressed p53 protein and 7 (53.8%) showed gene mutations. On comparing the results of immunostaining and SSCP analysis, there were two cases showing discrepancies between the p53 protein expression and gene mutations. Bcl-2 protein expression was observed in only two cases of follicular lymphoma. On the other hand, bax protein was detected in all 13 cases. One case with mutated bax gene showed a lower expression with a reduced frequency of bax-positive cells than the other 12. These results suggest that inactivation of p53 may be closely related to development and/or progression of these NHLs, and that bcl-2 and bax protein may not have a role.
authors.affiliation: Department of Oral and Maxillofacial Surgery II, Hiroshima University School of Dentistry, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Miyauchi
authors.forename: K
authors.initials: K
authors.lastname: Higashikawa
authors.forename: M
authors.initials: M
authors.lastname: Sugiyama
authors.forename: T
authors.initials: T
authors.lastname: Harada
authors.forename: N
authors.initials: N
authors.lastname: Sasaki
authors.forename: T
authors.initials: T
authors.lastname: Ishikawa
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002051:Burkitt Lymphoma / Q000235:genetics / Q000473:pathology; D002648:Child; D018450:Disease Progression; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D020868:Gene Silencing; D016158:Genes, p53 / Q000235:genetics; D006258:Head and Neck Neoplasms / Q000235:genetics*; D006801:Humans; D007124:Immunoenzyme Techniques; D016393:Lymphoma, B-Cell / Q000235:genetics / Q000473:pathology; D008224:Lymphoma, Follicular / Q000235:genetics / Q000473:pathology; D016403:Lymphoma, Large B-Cell, Diffuse / Q000235:genetics / Q000473:pathology; D008228:Lymphoma, Non-Hodgkin / Q000235:genetics* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009154:Mutation / Q000235:genetics; D018807:Polymorphism, Single-Stranded Conformational; D011518:Proto-Oncogene Proteins / Q000235:genetics*; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000235:genetics*; D016159:Tumor Suppressor Protein p53 / Q000235:genetics*; D051028:bcl-2-Associated X Protein
chemical_list: C494826:BAX protein, human; D011518:Proto-Oncogene Proteins; D019253:Proto-Oncogene Proteins c-bcl-2; D016159:Tumor Suppressor Protein p53; D051028:bcl-2-Associated X Protein