Overview
ARID1A (AT-rich interactive domain-containing protein 1A) is a gene that encodes a subunit of the SWI/SNF chromatin remodeling complex, which is involved in regulating DNA accessibility. Mutations in ARID1A are implicated in various cancers, including B-cell lymphomas. They are the most abundant in Burkitt lymphoma but also occur in FL and, to a lesser extent, DLBCL. Overall, components of SWI/SNF have been identified as an emerging theme in germinal centre-derived B-cell lymphomas but their role has not been thoroughly elucidated.1
Experimental Evidence
Driver mutations affecting this gene have been experimentally demonstrated to cause a reduction or loss of function (LOF).2
Relevance tier by entity
| Entity | Tier | Description |
|---|---|---|
| 1 | High-confidence BL gene | |
| 1 | High-confidence DLBCL gene | |
| 1 | High-confidence FL gene | |
| 1 | High-confidence MZL gene | |
| 1 | High-confidence PMBL gene |
Mutation incidence in large cohorts
| Entity | Collection | N | mutated | Incidence | 95% CI |
|---|---|---|---|---|---|
| DLBCL | GAMBL without Reddy | 1,089 | 76 | 0.0698 | [0.0547,0.0849] |
| DLBCL | GAMBL with Reddy | 2,088 | 120 | 0.0575 | [0.0475,0.0675] |
| DLBCL | BC | 231 | 16 | 0.0693 | [0.0365,0.102] |
| DLBCL | Dana-Farber | 303 | 12 | 0.0396 | [0.0176,0.0616] |
| DLBCL | NCI | 470 | 42 | 0.0894 | [0.0636,0.1152] |
| DLBCL | Reddy | 999 | 44 | 0.0440 | [0.0313,0.0568] |
| DLBCL | DLBCL_ICGC | 85 | 6 | 0.0706 | [0.0161,0.125] |
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Mutation pattern and selective pressure estimates
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Expression


