Project description:<p>This project aims to conduct genome-wide association studies (GWAS) in two anatomically different upper gastrointestinal (UGI) cancer sites in two populations with distinctly different disease rates and genetic profiles. One population has very high rates for both esophageal squamous cell carcinomas (ESCCs) and gastric cancers (GCs) and is comprised of Asians (<b>the "Asian UGI GWAS"</b>), while the other population has low rates of ESCC and GC and includes non-Asians from the Americas, Europe, and Australia (<b>the "Non-Asian UGI GWAS"</b>).</p> <p>Study participants for the Asian UGI GWAS reported here (Illumina 660W Quad chip) were drawn from 2 studies, the Shanxi Upper Gastrointestinal Cancer Genetics Project (Shanxi) and the Linxian Nutrition Intervention Trial (NIT), a prospective cohort, and included a total of 1898 ESCCs, 1625 GCs, and 2100 controls. For the 2nd phase (8 TaqMan SNPs), additional subjects from Shanxi and NIT as well as subjects from the Shanghai Men's Health Study (SMHS), the Shanghai Women's Health Study (SWHS), and the Singapore Chinese Health Study (SCHS) were also included (217 ESCCs, 615 GCs, 1202 controls). Altogether 2115 ESCCs, 2240 GCs, and 3302 controls were genotyped in this study.</p>
Project description:<p>This project aims to conduct genome-wide association studies (GWAS) in two anatomically different upper gastrointestinal (UGI) cancer sites in two populations with distinctly different disease rates and genetic profiles. One population has very high rates for both esophageal squamous cell carcinomas (ESCCs) and gastric cancers (GCs) and is comprised of Asians (<b>the "Asian UGI GWAS"</b>), while the other population has low rates of ESCC and GC and includes non-Asians from the Americas, Europe, and Australia (<b>the "Non-Asian UGI GWAS"</b>).</p> <p>Study participants for the Asian UGI GWAS reported here (Illumina 660W Quad chip) were drawn from 2 studies, the Shanxi Upper Gastrointestinal Cancer Genetics Project (Shanxi) and the Linxian Nutrition Intervention Trial (NIT), a prospective cohort, and included a total of 1898 ESCCs, 1625 GCs, and 2100 controls. For the 2nd phase (8 TaqMan SNPs), additional subjects from Shanxi and NIT as well as subjects from the Shanghai Men's Health Study (SMHS), the Shanghai Women's Health Study (SWHS), and the Singapore Chinese Health Study (SCHS) were also included (217 ESCCs, 615 GCs, 1202 controls). Altogether 2115 ESCCs, 2240 GCs, and 3302 controls were genotyped in this study.</p>
Project description:Erlotinib and bevacizumab have shown activity individually, as single drugs, or in combination with chemotherapy in upper gastro-intestinal cancers, including esophageal and gastro-esophageal adenocarcinomas, gastric cancer and pancreatic cancer. Biomarkers indicating an important role of EGF and VEGF have been found in these tumors, and in cholangiocarcinomas as well. There is promise that combined treatment with erlotinib and bevacizumab is active and tolerable in a broad range of upper gastro-intestinal cancers, justifying an experimental phase II-study of patients with these diagnoses, refractory or intolerant to standard systemic therapy.