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Ref Type Journal Article
PMID (21242281)
Authors Martin SA, Hewish M, Sims D, Lord CJ, Ashworth A
Title Parallel high-throughput RNA interference screens identify PINK1 as a potential therapeutic target for the treatment of DNA mismatch repair-deficient cancers.
Journal Cancer research
Vol 71
Issue 5
Date 2011 Mar 01
URL
Abstract Text Synthetic lethal approaches to cancer treatment have the potential to deliver relatively large therapeutic windows and therefore significant patient benefit. To identify potential therapeutic approaches for cancers deficient in DNA mismatch repair (MMR), we have carried out parallel high-throughput RNA interference screens using tumor cell models of MSH2- and MLH1-related MMR deficiency. We show that silencing of the PTEN-induced putative kinase 1 (PINK1), is synthetically lethal with MMR deficiency in cells with MSH2, MLH1, or MSH6 dysfunction. Inhibition of PINK1 in an MMR-deficient background results in an elevation of reactive oxygen species and the accumulation of both nuclear and mitochondrial oxidative DNA lesions, which likely limit cell viability. Therefore, PINK1 represents a potential therapeutic target for the treatment of cancers characterized by MMR deficiency caused by a range of different gene deficiencies.

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
MSH6 loss colon carcinoma not applicable N/A Preclinical Emerging Preclinical shRNA mediated-inhibition of PTEN-induced putative kinase 1 (PINK1) in colon carcinoma cells with MSH6 loss resulted in synthetic lethality, suggesting PINK1 may be a promising therapeutic target for MSH6 deficient cancer cells (PMID: 21242281). 21242281