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Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: BACKGROUND, METHODS, RESULTS. Meshes: Apoptosis, Carcinoma, Non-Small-Cell Lung, Cell Cycle, Cell Line, Tumor, DNA Copy Number Variations, DNA Methylation, Down-Regulation, ErbB Receptors, Gene Expression Regulation, Neoplastic, Genome-Wide Association Study, Humans, Lung Neoplasms, Mutation, Polymorphism, Single Nucleotide, SOXF Transcription Factors, Smoking.
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Is sOX7 down-regulated in lung cancer? Context: SOX7 is a transcription factor belonging to the SOX family. Its role in lung cancer is unknown. In this study, whole genomic copy number analysis was performed on a series of non-small cell lung cancer (NSCLC) cell lines and samples from individuals with epidermal growth factor receptor (EGFR) mutations using a SNP-Chip platform. SOX7 was measured in NSCLC samples and cell lines, and forced expressed in one of these lines. A notable surprise was that the numerous copy number (CN) changes observed in samples of Asian, non-smoking EGFR mutant NSCLC were nearly the same as those CN alterations seen in a large collection of NSCLC from The Cancer Genome Atlas which is presumably composed of predominantly Caucasians who often smoked. However, four regions had CN changes fairly unique to the Asian EGFR mutant group. We also examined CN changes in NSCLC lines. The SOX7 gene was homozygously deleted in one (HCC2935) of 10 NSCLC cell lines and heterozygously deleted in two other NSCLC lines. Expression of SOX7 was significantly downregulated in NSCLC cell lines (8/10, 80%) and a large collection of NSCLC samples compared to matched normal lung (57/62, 92%, p= 0.0006). Forced-expression of SOX7 in NSCLC cell lines markedly reduced their cell growth and enhanced their apoptosis.
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These data suggest that SOX7 is a novel tumor suppressor gene silenced in the majority of NSCLC samples. Final Decision: yes