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    AbstractGermline BRCA–associated pancreatic ductal adenocarcinoma (glBRCA PDAC) tumors are susceptible to platinum and PARP inhibition. The clinical outcomes of 125 patients with glBRCA PDAC were stratified based on the spectrum of response to platinum/PARP inhibition: (i) refractory [overall survival (OS) <6 months], (ii) durable response followed by acquired resistance (OS <36 months), and (iii) long-term responders (OS >36 months). Patient-derived xenografts (PDX) were generated from 25 patients with glBRCA PDAC at different clinical time points. Response to platinum/PARP inhibition in vivo and ex vivo culture (EVOC) correlated with clinical response. We deciphered the mechanisms of resistance in glBRCA PDAC and identified homologous recombination (HR) proficiency and secondary mutations restoring partial functionality as the most dominant resistant mechanism. Yet, a subset of HR-deficient (HRD) patients demonstrated clinical resistance. Their tumors displayed basal-like molecular s

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    • #ICYMI— Spectrum of Response to Platinum and #PARP Inhibitors in Germline #BRCA–Associated #PancreaticCancer in the Clinical and Preclinical Setting, by @ChaniStossel, Maria Raitses-Gurevich Talia Golan et al. https://t.co/dKqtorhfSw @sheba_medical @TelAvivUni https://t.co/c1x9hjKqug