Arpita Desai: KCRS 2026 Summit Highlights SBRT’s Immune Benefits in Metastatic RCC
Arpita Desai/www.ucsfhealth.org

Arpita Desai: KCRS 2026 Summit Highlights SBRT’s Immune Benefits in Metastatic RCC

Arpita Desai, Medical Director of GU Medical Oncology, Associate Professor at UC San Francisco, shared on X:

Nicholas Salgia (Roswell Park) on SBRT and mediators of humoral immune activity in metastatic RCC at KCRS26:

  • NCT01892930, ±15 Gy SBRT before nephrectomy, tumor sampled at 4 weeks
  • Bulk RNAseq, 8 control vs 8 SBRT: higher xCell B cell score (p=8.6e-4) and class-switched memory B cell score (p=0.013) after SBRT
  • IGH clonotype count was not significantly different (p=0.161)
  • Gene set enrichment showed humoral programs higher in SBRT samples, including immunoglobulin production, B cell-mediated immunity, BCR signaling, and CD22-mediated BCR regulation.”

Arpita Desai

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