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Gene | CDKN2A |
Variant | del |
Impact List | deletion |
Protein Effect | loss of function |
Gene Variant Descriptions | CDKN2A del indicates a deletion of the CDKN2A gene. |
Associated Drug Resistance | |
Category Variants Paths |
CDKN2A mutant CDKN2A inact mut CDKN2A del |
Molecular Profile | Indication/Tumor Type | Response Type | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
---|---|---|---|---|---|---|---|
CDKN2A del | high grade glioma | sensitive | Abemaciclib | Preclinical - Cell line xenograft | Actionable | In a preclinical study, Verzenio (abemaciclib) inhibited viability and G1/S transition in glioma cell lines harboring IDH1 R132H and deletion of CDKN2A in culture and inhibited tumor growth and improved survival in cell line xenograft models (PMID: 38718141). | 38718141 |
CDKN2A del | glioblastoma | sensitive | Palbociclib | Preclinical - Pdx & cell culture | Actionable | In a preclinical study, Ibrance (palbociclib) inhibited proliferation of patient-derived glioblastoma cells harboring homozygous deletion of CDKN2A in culture and prolonged survival in patient-derived xenograft models (PMID: 22711607). | 22711607 |
CDKN2A del | high grade glioma | sensitive | Palbociclib | Preclinical - Cell culture | Actionable | In a preclinical study, Ibrance (palbociclib) inhibited viability in glioma cell lines harboring IDH1 R132H and deletion of CDKN2A in culture (PMID: 38718141). | 38718141 |
CDKN2A del | gastrointestinal stromal tumor | no benefit | Palbociclib | Phase II | Actionable | In a Phase II trial, Ibrance (palbociclib) treatment did not demonstrated clinical efficacy in heavily pre-treated gastrointestinal stromal tumor patients harboring CDKN2A homozygous or heterozygous deletion, with 86.4% (19/22) of patients demonstrated progressive disease at 4 months (PMID: 30979737; NCT01907607). | 30979737 |
CDKN2A del | glioblastoma | no benefit | Abemaciclib + Temozolomide | Phase II | Actionable | In a Phase II trial (INSIGhT), concurrent radiation and Temodar (temozolomide) followed by adjuvant Verzenio (abemaciclib) (n=73) improved progression-free survival (PFS; HR 0.72, p=0.046) but not overall survival (OS; HR 0.69, p=0.053) compared to standard chemoradiation (n=51) in newly-diagnosed MGMT-unmethylated glioblastoma patients, PFS (HR 0.69, p=0.053) and OS (HR 0.76, p=0.12) were not improved in the CDK biomarker-positive (CDK4/6 amp or CDKN2A deletion) subgroup (PMID: 37722087; NCT02977780). | 37722087 |
CDKN2A del | lung cancer | predicted - sensitive | PF-00477736 + PF3644022 | Preclinical - Cell line xenograft | Actionable | In a preclinical study, Chk1 inhibitor PF-477736 and MK2 inhibitor PF3644022 synergistically inhibited tumor growth in cell line xenograft models of CDKN2A-deleted lung cancer (PMID: 26140595). | 26140595 |
CDKN2A del | melanoma | decreased response | unspecified immune checkpoint inhibitor | Clinical Study - Cohort | Actionable | In a retrospective analysis, treatment with an immune checkpoint inhibitor resulted in a decreased response in melanoma patients with homozygous deletion of CDKN2A or loss of function CDKN2A mutations compared to patients with wild-type CDKN2A in one cohort, with a lower overall survival (OS) of 27.2 mo vs not yet reached and time to treatment failure of 10 vs 20.1 mo, respectively, but in a second cohort, there were no significant differences in OS (PMID: 34074656). | 34074656 |
CDKN2A del | lung non-small cell carcinoma | not predictive | unspecified immune checkpoint inhibitor | Clinical Study - Cohort | Actionable | In a retrospective analysis, homozygous deletion of CDKN2A or loss of function CDKN2A mutations in two cohorts of non-small cell lung cancer patients were not predictive of overall survival or time to treatment failure when treated with immune checkpoint inhibitors (PMID: 34074656). | 34074656 |
CDKN2A del | bladder urothelial carcinoma | decreased response | unspecified immune checkpoint inhibitor | Clinical Study - Cohort | Actionable | In a retrospective analysis, treatment with an immune checkpoint inhibitor resulted in a decreased response in urothelial carcinoma patients with either homozygous deletion of CDKN2A or loss of function CDKN2A mutations compared to those patients with wild-type CDKN2A in two different cohorts, with an overall survival for each cohort of 8.8 and 11 mo. versus 25.2 and 19 mo, respectively, and time to treatment failure of 4.2 mo. versus 8.4 mo., respectively, in one cohort (PMID: 34074656). | 34074656 |
CDKN2A del | renal cell carcinoma | not predictive | unspecified immune checkpoint inhibitor | Clinical Study - Cohort | Actionable | In a retrospective analysis, homozygous deletion of CDKN2A or loss of function CDKN2A mutations in one cohort of renal cell carcinoma patients were not predictive of overall survival or time to treatment failure when treated with immune checkpoint inhibitors, but in another cohort were significantly associated with reduced overall survival compared to wild-type CDKN2A (13 months vs 50 months, P=0.002)(PMID: 34074656). | 34074656 |
CDKN2A del | head and neck squamous cell carcinoma | not predictive | unspecified immune checkpoint inhibitor | Clinical Study - Cohort | Actionable | In a retrospective analysis, homozygous deletion of CDKN2A or loss of function CDKN2A mutations in two cohorts of head and neck squamous cell carcinoma patients were not predictive of overall survival or time to treatment failure when treated with immune checkpoint inhibitors (PMID: 34074656). | 34074656 |
CDKN2A del | gastroesophageal cancer | not predictive | unspecified immune checkpoint inhibitor | Clinical Study - Cohort | Actionable | In a retrospective analysis, homozygous deletion of CDKN2A or loss of function CDKN2A mutations in one cohort of esophagogastric cancer patients were not predictive of overall survival or time to treatment failure when treated with immune checkpoint inhibitors, but in another cohort were significantly associated with reduced overall survival compared to wild-type CDKN2A (8 months vs 17 months, P=0.006) (PMID: 34074656). | 34074656 |