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Breast cancer is the leading cause of cancer-related deaths in women, with the highest mortality rates being seen in women from sub-Saharan African nations. This is, in part, attributed to the high incidence rates of triple-negative breast cancer (TNBC), a highly aggressive form of breast cancer, in this patient population. Previous studies that investigated racial differences in this disease were heavily reliant on self-reported race in mainly U.S. populations, making the true association between TNBC biology and African ancestry undetermined. To determine genetic drivers associated with the predisposition of those of West African ancestry to TNBC, Martini and colleagues used RNA sequencing of an international cohort of African Americans and West and East Africans and identified 613 genes associated with African ancestry and over 2,000 genes connected to regional African ancestry, with a subset of these genes being observed to have differences in normal breast tissue. Furthermore, evaluation of cellular composition indicated that distinct tumor-associated immunologic profiles are present in patients of African descent. Overall, this study determines an individual's ancestry down to specific regions within Africa as well as provides a link between African ancestry and TNBC and suggests future therapeutic options for this aggressive disease. For more information, see the article by Martini and colleagues on page 2530. - PDF Icon PDF LinkTable of Contents
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Editorial
The AACR Journals: Advancing Progress Toward the AACR's 115-Year Mission
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Research Articles
African Ancestry–Associated Gene Expression Profiles in Triple-Negative Breast Cancer Underlie Altered Tumor Biology and Clinical Outcome in Women of African Descent
Gene expression profiles in patients of African ancestry with triple-negative breast cancer indicate differences in normal breast tissue as well as in the tumor-associated immunologic profiles, supporting the potential differences in clinical outcomes between race groups.
Genetic Ancestry Correlates with Somatic Differences in a Real-World Clinical Cancer Sequencing Cohort
Genetic ancestry inference in a clinical pan-cancer cohort of 45,157 patients enabled discovery of ancestry-specific differences in the frequency of somatic features and the prevalence of clinically actionable alterations.
Developmental Deconvolution for Classification of Cancer Origin
An artificial intelligence classifier trained to distinguish the developmental profiles of different tumor types is applied to cancers of unknown primary, revealing diagnosis for each case.
Proteogenomic Markers of Chemotherapy Resistance and Response in Triple-Negative Breast Cancer
Proteogenomic analyses of triple-negative breast cancer samples from a neoadjuvant carboplatin/docetaxel chemotherapy trial identified LIG1 loss as a biomarker for carboplatin-selective resistance, chromosomal instability, and disease progression.
Spatial Positioning and Matrix Programs of Cancer-Associated Fibroblasts Promote T-cell Exclusion in Human Lung Tumors
Spatial and transcriptomic analysis of a large cohort of human lung tumors uncovers two cancer-associated fibroblast populations and their matrix expression profiles associated with T-cell exclusion in human non–small cell lung carcinoma.
The Single-Cell Immunogenomic Landscape of B and Plasma Cells in Early-Stage Lung Adenocarcinoma
Single-cell and spatial profiling of tumor-infiltrating B and plasma cells in early-stage lung adenocarcinoma (LUAD) highlights previously unappreciated roles of these cells in the LUAD ecosystem and immunotherapy response.
Pharmacologic Inhibition of NT5C2 Reverses Genetic and Nongenetic Drivers of 6-MP Resistance in Acute Lymphoblastic Leukemia
CRCD2 was developed as a first-in-class, small-molecule NT5C2 nucleotidase inhibitor, which enhances the efficacy of thiopurine therapy and overcomes resistance in relapsed acute lymphoblastic leukemia.
AXL and Error-Prone DNA Replication Confer Drug Resistance and Offer Strategies to Treat EGFR-Mutant Lung Cancer
Resistance of EGFR-mutant lung cancers to EGFR inhibitors can occur through engagement of mutation-prone DNA replication activated by GAS6 and AXL upregulation, and blocking this pathway can prevent resistance and offer new treatment strategies.
Small-Molecule Inhibition of the Acyl-Lysine Reader ENL as a Strategy against Acute Myeloid Leukemia
Small-molecule inhibition of ENL leads to suppression of oncogenic gene expression and blocks the progression of MLL-rearranged and NPM1-mutated acute myeloid leukemia (AML), demonstrating ENL as a promising therapeutic target for AML subsets.
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