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| Ref Type | Journal Article | ||||||||||||
| PMID | (20739657) | ||||||||||||
| Authors | Weston VJ, Oldreive CE, Skowronska A, Oscier DG, Pratt G, Dyer MJ, Smith G, Powell JE, Rudzki Z, Kearns P, Moss PA, Taylor AM, Stankovic T | ||||||||||||
| Title | The PARP inhibitor olaparib induces significant killing of ATM-deficient lymphoid tumor cells in vitro and in vivo. | ||||||||||||
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| Abstract Text | The Ataxia Telangiectasia Mutated (ATM) gene is frequently inactivated in lymphoid malignancies such as chronic lymphocytic leukemia (CLL), T-prolymphocytic leukemia (T-PLL), and mantle cell lymphoma (MCL) and is associated with defective apoptosis in response to alkylating agents and purine analogues. ATM mutant cells exhibit impaired DNA double strand break repair. Poly (ADP-ribose) polymerase (PARP) inhibition that imposes the requirement for DNA double strand break repair should selectively sensitize ATM-deficient tumor cells to killing. We investigated in vitro sensitivity to the poly (ADP-ribose) polymerase inhibitor olaparib (AZD2281) of 5 ATM mutant lymphoblastoid cell lines (LCL), an ATM mutant MCL cell line, an ATM knockdown PGA CLL cell line, and 9 ATM-deficient primary CLLs induced to cycle and observed differential killing compared with ATM wildtype counterparts. Pharmacologic inhibition of ATM and ATM knockdown confirmed the effect was ATM-dependent and mediated through mitotic catastrophe independently of apoptosis. A nonobese diabetic/severe combined immunodeficient (NOD/SCID) murine xenograft model of an ATM mutant MCL cell line demonstrated significantly reduced tumor load and an increased survival of animals after olaparib treatment in vivo. Addition of olaparib sensitized ATM null tumor cells to DNA-damaging agents. We suggest that olaparib would be an appropriate agent for treating refractory ATM mutant lymphoid tumors. | ||||||||||||
| Gene Name | Source | Synonyms | Protein Domains | Gene Description | Gene Role |
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| Therapy Name | Drugs | Efficacy Evidence | Clinical Trials |
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| Drug Name | Trade Name | Synonyms | Drug Classes | Drug Description |
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| Gene | Variant | Impact | Protein Effect | Variant Description | Associated with drug Resistance |
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| Molecular Profile | Indication/Tumor Type | Response Type | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
|---|---|---|---|---|---|---|---|
| ATM inact mut | mantle cell lymphoma | sensitive | Fludarabine + Olaparib | Preclinical - Cell culture | Actionable | In a preclinical study, Lynparza (olaparib) sensitized a mantle cell lymphoma cell line harboring an ATM inactivating mutation to Fludara (fludarabine) in cell culture, resulting in decreased cell survival (PMID: 20739657). | 20739657 |
| ATM inact mut | lymphoid leukemia | sensitive | Olaparib | Preclinical - Patient cell culture | Actionable | In a preclinical study, lymphoblastoid cell lines with ATM inactivation derived from ataxia-telangiectasia patients demonstrated increased sensitivity to Lynparza (olaparib) in culture, compared to ATM wild-type cell lines (PMID: 20739657). | 20739657 |
| ATM inact mut | mantle cell lymphoma | sensitive | Olaparib | Preclinical - Cell line xenograft | Actionable | In a preclinical study, a mantle cell lymphoma cell line with ATM inactivation demonstrated sensitivity to Lynparza (olaparib) in culture and in xenograft models (PMID: 20739657). | 20739657 |
| ATM inact mut | chronic lymphocytic leukemia | sensitive | Olaparib | Preclinical - Patient cell culture | Actionable | In a preclinical study, patient-derived chronic lymphocytic leukemia cells with inactivating mutations in ATM, that had been induced to proliferate in culture, demonstrated increased sensitivity to growth inhibition by Lynparza (olaparib) compared to ATM wild-type cells (PMID: 20739657). | 20739657 |
| ATM inact mut | mantle cell lymphoma | sensitive | Olaparib + Valproic acid | Preclinical - Cell culture | Actionable | In a preclinical study, the combination of Lynparza (olaparib) and valproic acid worked synergistically to inhibit growth of a mantle cell lymphoma cell line harboring an ATM inactivating mutation in culture (PMID: 20739657). | 20739657 |
| ATM inact mut | mantle cell lymphoma | sensitive | Bendamustine + Olaparib | Preclinical - Cell culture | Actionable | In a preclinical study, Lynparza (olaparib) sensitized a mantle cell lymphoma cell line harboring an ATM inactivating mutation to Treanda (bendamustine) in cell culture, resulting in growth inhibition (PMID: 20739657). | 20739657 |