Recurrent PTPRT/JAK2 mutations in lung adenocarcinoma among African Americans

Reducing or eliminating persistent disparities in lung cancer incidence and survival has been challenging because our current understanding of lung cancer biology is derived primarily from populations of European descent. Here we show results from a targeted sequencing panel using NCI-MD Case Control Study patient samples and reveal a significantly higher prevalence of PTPRT and JAK2 mutations in lung adenocarcinomas among African Americans compared with European Americans. This increase in mutation frequency was validated with independent WES data from the NCI-MD Case Control Study and TCGA. We find that patients carrying these mutations have a concomitant increase in IL-6/STAT3 signaling and miR-21 expression. Together, these findings suggest the identification of these potentially actionable mutations could have clinical significance for targeted therapy and the enrollment of minority populations in clinical trials. Lung cancer etiology has largely been studied in homogenous populations of European descent. Here, targeted sequencing in African American lung adenocarcinomas finds significantly higher prevalence of PTPRT and JAK2 mutations, validated independently by whole exome sequencing, highlighting potentially clinically actionable mutations in this population.