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Clinical and genomic landscape of gastric cancer with a mesenchymal phenotype.


ABSTRACT: Gastric cancer is a heterogeneous cancer, making treatment responses difficult to predict. Here we show that we identify two distinct molecular subtypes, mesenchymal phenotype (MP) and epithelial phenotype (EP), by analyzing genomic and proteomic data. Molecularly, MP subtype tumors show high genomic integrity characterized by low mutation rates and microsatellite stability, whereas EP subtype tumors show low genomic integrity. Clinically, the MP subtype is associated with markedly poor survival and resistance to standard chemotherapy, whereas the EP subtype is associated with better survival rates and sensitivity to chemotherapy. Integrative analysis shows that signaling pathways driving epithelial-to-mesenchymal transition and insulin-like growth factor 1 (IGF1)/IGF1 receptor (IGF1R) pathway are highly activated in MP subtype tumors. Importantly, MP subtype cancer cells are more sensitive to inhibition of IGF1/IGF1R pathway than EP subtype. Detailed characterization of these two subtypes could identify novel therapeutic targets and useful biomarkers for prognosis and therapy response.

SUBMITTER: Oh SC 

PROVIDER: S-EPMC5934392 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature

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Clinical and genomic landscape of gastric cancer with a mesenchymal phenotype.

Oh Sang Cheul SC   Sohn Bo Hwa BH   Cheong Jae-Ho JH   Kim Sang-Bae SB   Lee Jae Eun JE   Park Ki Cheong KC   Lee Sang Ho SH   Park Jong-Lyul JL   Park Yun-Yong YY   Lee Hyun-Sung HS   Jang Hee-Jin HJ   Park Eun Sung ES   Kim Sang-Cheol SC   Heo Jeonghoon J   Chu In-Sun IS   Jang You-Jin YJ   Mok Young-Jae YJ   Jung WonKyung W   Kim Baek-Hui BH   Kim Aeree A   Cho Jae Yong JY   Lim Jae Yun JY   Hayashi Yuki Y   Song Shumei S   Elimova Elena E   Estralla Jeannelyn S JS   Lee Jeffrey H JH   Bhutani Manoop S MS   Lu Yiling Y   Liu Wenbin W   Lee Jeeyun J   Kang Won Ki WK   Kim Sung S   Noh Sung Hoon SH   Mills Gordon B GB   Kim Seon-Young SY   Ajani Jaffer A JA   Lee Ju-Seog JS  

Nature communications 20180503 1


Gastric cancer is a heterogeneous cancer, making treatment responses difficult to predict. Here we show that we identify two distinct molecular subtypes, mesenchymal phenotype (MP) and epithelial phenotype (EP), by analyzing genomic and proteomic data. Molecularly, MP subtype tumors show high genomic integrity characterized by low mutation rates and microsatellite stability, whereas EP subtype tumors show low genomic integrity. Clinically, the MP subtype is associated with markedly poor survival  ...[more]

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