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|Protein Effect||no effect|
|Gene Variant Descriptions||ATM dec exp indicates decreased expression of the Atm protein and/or mRNA. However, the mechanism causing the decreased expression is unspecified.|
|Associated Drug Resistance|
|Molecular Profile||Indication/Tumor Type||Response Type||Therapy Name||Approval Status||Evidence Type||Efficacy Evidence||References|
|ATM dec exp||stomach cancer||sensitive||Veliparib||Preclinical - Cell line xenograft||Actionable||In a preclinical study, knockdown of ATM in a gastric cancer cell line resulted in increased sensitivity to Veliparib (ABT-888) in culture and in xenograft models (PMID: 27638859).||27638859|
|ATM dec exp||breast cancer||sensitive||Talazoparib||Preclinical - Cell culture||Actionable||In a preclinical study, knockdown of ATM expression sensitized breast cancer cells to treatment with Talzenna (talazoparib) in culture (PMID: 23881923).||23881923|
|ATM dec exp||stomach cancer||predicted - sensitive||Olaparib + Paclitaxel||Phase II||Actionable||In a Phase II trial, addition of Lynparza (olaparib) to Taxol (paclitaxel) did not significantly improve progression free survival (5.29 vs 3.68 months) compared to Taxol alone, but did significantly prolong overall survival (HR = 0.35) in metastatic gastric cancer patients with decreased Atm expression (PMID: 26282658; NCT01063517).||26282658|