Amplification and expression of EGFR and ERBB2 in Wilms tumor.
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Amplification and expression of EGFR and ERBB2 in Wilms tumor. / Vasei, Mohammad; Helmout, Modjtahedi; Ale-Booyeh, Oreineb; Mosallaei, Ahmad; Kajbafzadeh, Abdol Mohammad; Shahriari, Mehdi; Ghaderi, Abbas Ali; Soleymanpour, Hossein; Kosari, Farid; Moch, Holger; Sauter, Guido.
in: CANCER GENET-NY, Jahrgang 194, Nr. 2, 2, 2009, S. 88-95.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - Amplification and expression of EGFR and ERBB2 in Wilms tumor.
AU - Vasei, Mohammad
AU - Helmout, Modjtahedi
AU - Ale-Booyeh, Oreineb
AU - Mosallaei, Ahmad
AU - Kajbafzadeh, Abdol Mohammad
AU - Shahriari, Mehdi
AU - Ghaderi, Abbas Ali
AU - Soleymanpour, Hossein
AU - Kosari, Farid
AU - Moch, Holger
AU - Sauter, Guido
PY - 2009
Y1 - 2009
N2 - Wilms tumor is one of the most common solid tumors in children. We evaluated expression and amplification of a number of genes and their prognostic significance in 45 patients with Wilms tumor, using tissue microarray technology. The expression of EGFR, ERBB2, MDM2, CCND1, MLH1, MSH2, TP53, and ABCB1 (alias MDR1) was studied by immunohistochemistry. Amplification of the EGFR, ERBB2, MDM2, CCND1, CTTN (previously EMS1), RAF1, MYC, FGF3 (previously INT2), WNT1, GLI1, CDK4, and NCOA3 (alias AIB1) genes was assessed by fluorescence in situ hybridization. Expression of EGFR was seen in 17 of the 45 cases (38%) but was not associated with gene amplification. The ERBB2 gene was neither overexpressed nor amplified in any case. Tissue microarray and immunohistochemistry analyses for ERBB2 in whole-tumor sections were also negative in all cases. Strong p53 reactivity was noted in blastemal cells in two cases with an unfavorable outcome. ABCB1 reactivity was seen in five cases with favorable histology and outcome. Only one case showed nuclear cyclin D1 positivity. All tumors showed MLH1 and MSH2 expression. All examined genes showed normal copy numbers. Unfavorable histology correlated with poor prognosis (P=0.03). There was no significant association between gene expression and prognosis. Overexpression of the EGFR gene in many Wilms tumor cases warrants further study to determine the therapeutic benefit of EGFR inhibitors in combination with other therapies in Wilms tumor patients.
AB - Wilms tumor is one of the most common solid tumors in children. We evaluated expression and amplification of a number of genes and their prognostic significance in 45 patients with Wilms tumor, using tissue microarray technology. The expression of EGFR, ERBB2, MDM2, CCND1, MLH1, MSH2, TP53, and ABCB1 (alias MDR1) was studied by immunohistochemistry. Amplification of the EGFR, ERBB2, MDM2, CCND1, CTTN (previously EMS1), RAF1, MYC, FGF3 (previously INT2), WNT1, GLI1, CDK4, and NCOA3 (alias AIB1) genes was assessed by fluorescence in situ hybridization. Expression of EGFR was seen in 17 of the 45 cases (38%) but was not associated with gene amplification. The ERBB2 gene was neither overexpressed nor amplified in any case. Tissue microarray and immunohistochemistry analyses for ERBB2 in whole-tumor sections were also negative in all cases. Strong p53 reactivity was noted in blastemal cells in two cases with an unfavorable outcome. ABCB1 reactivity was seen in five cases with favorable histology and outcome. Only one case showed nuclear cyclin D1 positivity. All tumors showed MLH1 and MSH2 expression. All examined genes showed normal copy numbers. Unfavorable histology correlated with poor prognosis (P=0.03). There was no significant association between gene expression and prognosis. Overexpression of the EGFR gene in many Wilms tumor cases warrants further study to determine the therapeutic benefit of EGFR inhibitors in combination with other therapies in Wilms tumor patients.
M3 - SCORING: Zeitschriftenaufsatz
VL - 194
SP - 88
EP - 95
JO - CANCER GENET-NY
JF - CANCER GENET-NY
SN - 2210-7762
IS - 2
M1 - 2
ER -
