Reference Detail

Ref Type

Journal Article

PMID

(32726432)

Authors

Pitter KL, Casey DL, Lu YC, Hannum M, Zhang Z, Song X, Pecorari I, McMillan B, Ma J, Samstein RM, Pei IX, Khan AJ, Braunstein LZ, Morris LGT, Barker CA, Rimner A, Alektiar KM, Romesser PB, Crane CH, Yahalom J, Zelefsky MJ, Scher HI, Bernstein JL, Mandelker DL, Weigelt B, Reis-Filho JS, Lee NY, Powell SN, Chan TA, Riaz N, Setton J

Title

Pathogenic ATM Mutations in Cancer and a Genetic Basis for Radiotherapeutic Efficacy.

Journal	Vol	Issue	Date	Pages	Journal Short Title
Journal of the National Cancer Institute	113	3	2021 Mar 01	266-273	J Natl Cancer Inst

URL

Abstract Text

Radiation therapy is one of the most commonly used cancer therapeutics but genetic determinants of clinical benefit are poorly characterized. Pathogenic germline variants in ATM are known to cause ataxia-telangiectasia, a rare hereditary syndrome notable for marked radiosensitivity. In contrast, somatic inactivation of ATM is a common event in a wide variety of cancers, but its clinical actionability remains obscure.We analyzed 20 107 consecutively treated advanced cancer patients who underwent targeted genomic sequencing as part of an institutional genomic profiling initiative and identified 1085 harboring a somatic or germline ATM mutation, including 357 who received radiotherapy (RT). Outcomes of irradiated tumors harboring ATM loss-of-function (LoF) mutations were compared with those harboring variants of unknown significance. All statistical tests were 2-sided.Among 357 pan-cancer patients who received 727 courses of RT, genetic inactivation of ATM was associated with improved radiotherapeutic efficacy. The 2-year cumulative incidence of irradiated tumor progression was 13.2% vs 27.5% for tumors harboring an ATM LoF vs variant of unknown significance allele, respectively (hazard ratio [HR] = 0.51, 95% confidence interval [CI] = 0.34 to 0.77, P = .001). The greatest clinical benefit was seen in tumors harboring biallelic ATM inactivation (HR = 0.19, 95% CI = 0.06 to 0.60, P = .005), with statistically significant benefit also observed in tumors with monoallelic ATM inactivation (HR = 0.57, 95% CI = 0.35 to 0.92, P = .02). Notably, ATM LoF was highly predictive of outcome in TP53 wild-type tumors but not among TP53-mutant tumors.We demonstrate that somatic ATM inactivation is associated with markedly improved tumor control following RT. The identification of a radio-sensitive tumor phenotype across multiple cancer types offers potential clinical opportunities for genomically guided RT.

Filtering

Case insensitive filtering will display rows if any text in any cell matches the filter term
Use simple literal full or partial string matches
Separate multiple filter terms with a space. Any order may be used (i. e. a b c and c b a are equivalent )
Filtering will only apply to rows that are already loaded on the page. Filtering has no impact on query parameters.
Use quotes to match on a longer phrase with spaces (i.e. "mtor c1483f")

Sorting

Generally, the default sort order for tables is set to be first column ascending; however, specific tables may set a different default sort order.
Click on any column header arrows to sort by that column
Hold down the Shift key and click multiple columns to sort by more than one column. Be sure to set ascending or descending order for a given column before moving on to the next column.

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
ATM inact mut	Advanced Solid Tumor	predicted - sensitive	Radiotherapy	Clinical Study	Actionable	In a clinical study, treatment with radiotherapy resulted in greater therapeutic efficacy in advanced solid tumor patients harboring an ATM inactivating mutation (n=177) compared to those who harbored an ATM variant of unknown significance (n=180), demonstrating a significantly decreased 2-year cumulative incidence of irradiated progression, 13.2% versus 27.5% (p=0.001), respectively, and the greatest clinical benefit was observed in tumors with bi-allelic ATM inactivating mutations (PMID: 32726432).	32726432