title: HER-2/neu and p53 in osteosarcoma: an immunohistochemical and fluorescence in situ hybridization analysis.
abstract: The overexpression of HER-2/neu and p53 has been associated with poor outcome in many neoplasms. Their role in patients with osteosarcoma is unclear. We studied the expression of HER-2/neu and p53 in 22 osteosarcoma samples (from 20 patients--2 had locally recurrent disease) biopsied at the University of Medicine and Dentistry of New Jersey (UMDNJ) from 1996-2000 using both immunohistochemical (IHC) and fluorescence in situ hybridization (FISH) analysis. Fourteen patients (14 samples) presented with Stage II and 6 patients (8 samples) presented with Stage III disease. Median follow-up is two years (range one year to five years). Four of 22 (18%) samples showed focal membranous or cytoplasmic positivity for HER-2/neu and six of 22 samples (27%) showed nuclear positivity for p53 by IHC analysis. In contrast, none of 22 tested samples showed gene amplification for HER-2/neu by FISH analysis. Seven of 13 HER-2/neu and p53 negative patients (54%) are currently disease free (between one year to five years). In this sample of patients, the HER-2/neu oncogene is not overexpressed or amplified in osteosarcoma; six of 22 samples (27%) showed overexpression of p53 by IHC analysis. By FISH, none of the samples demonstrated deletion of p53. Neither HER2/neu nor p53 expression was important for the biology of osteosarcoma in this population.
authors.affiliation: UMDNJ-New Jersey Medical School, Newark, New Jersey, USA. james_tsai@brown.edu
authors.forename: James Y
authors.initials: JY
authors.lastname: Tsai
authors.forename: Hana
authors.initials: H
authors.lastname: Aviv
authors.forename: Joseph
authors.initials: J
authors.lastname: Benevenia
authors.forename: Victor T
authors.initials: VT
authors.lastname: Chang
authors.forename: Francis
authors.initials: F
authors.lastname: Patterson
authors.forename: Seena
authors.initials: S
authors.lastname: Aisner
authors.forename: Meera
authors.initials: M
authors.lastname: Hameed
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D018572:Disease-Free Survival; D005260:Female; D020869:Gene Expression Profiling; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007150:Immunohistochemistry; D017404:In Situ Hybridization, Fluorescence; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D012516:Osteosarcoma / Q000235:genetics* / Q000473:pathology; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000096:biosynthesis* / Q000235:genetics*; D016159:Tumor Suppressor Protein p53 / Q000096:biosynthesis* / Q000235:genetics*
chemical_list: D018719:Erb-b2 Receptor Tyrosine Kinases; D016159:Tumor Suppressor Protein p53