PMID- 21134821 OWN - NLM STAT- MEDLINE DCOM- 20110203 LR - 20171116 IS - 1769-6917 (Electronic) IS - 0007-4551 (Linking) VI - 97 IP - 12 DP - 2010 Dec TI - [HER2 and gastric cancer: a novel therapeutic target for trastuzumab]. PG - 1429-40 LID - 10.1684/bdc.2010.1224 [doi] AB - HER2 protein overexpression by immunohistochemistry (IHC) and/or erB2 gene amplification by in situ hybridization (ISH) was detected in 4-28% of gastric or gastro-oesophageal junction (GOJ) cancers. Most studies have shown that HER2-overexpressing gastric cancers were worse prognosis. Trastuzumab is a humanized monoclonal antibody directed against HER2 with known efficacy in patients with HER2+ early or metastatic breast cancer. The international randomized trial ToGA study showed the superiority of the combination of trastuzumab with chemotherapy doublet fluoropyrimidine (5-FU or capecitabine) plus cisplatin (FP) every three weeks compared with chemotherapy alone in terms of overall survival : 13.8 versus 11.1 months (HR: 0.74, 95% CI: 0.60-0.91, P = 0.0046) in HER2+ advanced gastric cancers. The benefit was even greater in the subgroup with HER2 overexpression (16% of the screened population) as defined by IHC3+ or IHC2+ confirmed by positive ISH test. Trastuzumab plus FP chemotherapy has become the standard treatment for patients with HER2+ non-pretreated metastatic adenocarcinoma of the stomach or GOJ cancer. All these cancers should be tested for HER2 on paraffin block resection or biopsy specimens of the primary tumour or metastases. Endoscopic gastric biopsies should be multiple. The IHC should be the initial test. The standardized immunohistochemical scoring system differs from that recommended for breast cancer given the heterogeneity of HER2 expression and the frequency of incomplete membranous staining in gastric cancers. Equivocal IHC2+ tumours should be tested by ISH with two tools: fluorescence in situ hybridization (FISH) or bright field in situ hybridization (SISH). The perspectives are the assessment of trastuzumab in the perioperative and adjuvant setting, the development of novel anti-HER2 drugs and research into mechanisms of resistance and predictive molecular markers. FAU - Bouche, O AU - Bouche O AD - Service d'hepatogastroenterologie et de cancerologie digestive, CHU de Reims, Hopital Robert-Debre, avenue du General-Koenig, 51092 Reims cedex, France. obouche@chu-reims.fr FAU - Penault-Llorca, F AU - Penault-Llorca F LA - fre PT - Journal Article PT - Review TT - HER2 et cancer de l'estomac : une nouvelle cible therapeutique pour le trastuzumab. PL - France TA - Bull Cancer JT - Bulletin du cancer JID - 0072416 RN - 0 (Antibodies, Monoclonal) RN - 0 (Antibodies, Monoclonal, Humanized) RN - 0 (Antineoplastic Agents) RN - 0W860991D6 (Deoxycytidine) RN - 6804DJ8Z9U (Capecitabine) RN - EC 2.7.10.1 (ERBB2 protein, human) RN - EC 2.7.10.1 (Receptor, ErbB-2) RN - P188ANX8CK (Trastuzumab) RN - Q20Q21Q62J (Cisplatin) RN - U3P01618RT (Fluorouracil) SB - IM MH - Antibodies, Monoclonal/administration & dosage/adverse effects/*therapeutic use MH - Antibodies, Monoclonal, Humanized MH - Antineoplastic Agents/*therapeutic use MH - Antineoplastic Combined Chemotherapy Protocols/therapeutic use MH - Capecitabine MH - Cisplatin/administration & dosage MH - Contraindications MH - Deoxycytidine/administration & dosage/analogs & derivatives MH - *Esophagogastric Junction MH - Fluorouracil/administration & dosage/analogs & derivatives MH - Humans MH - Immunohistochemistry/methods MH - In Situ Hybridization/methods MH - Paraffin Embedding MH - Randomized Controlled Trials as Topic MH - Receptor, ErbB-2/*analysis/antagonists & inhibitors MH - Stomach Neoplasms/chemistry/*drug therapy MH - Trastuzumab EDAT- 2010/12/08 06:00 MHDA- 2011/02/04 06:00 CRDT- 2010/12/08 06:00 PHST- 2010/12/08 06:00 [entrez] PHST- 2010/12/08 06:00 [pubmed] PHST- 2011/02/04 06:00 [medline] AID - S0007-4551(15)30729-3 [pii] AID - 10.1684/bdc.2010.1224 [doi] PST - ppublish SO - Bull Cancer. 2010 Dec;97(12):1429-40. doi: 10.1684/bdc.2010.1224.