Evidences of CTLA-4 and PD-1 blocking agents-induced cardiotoxicity in cellular and preclinical models

Research output: Contribution to journalArticlepeer-review


Background: Several strategies based on immune checkpoint inhibitors (ICIs) have been developed for cancer therapy, opening to advantages in cancer outcomes. However, several ICI-induced side effects have emerged in these patients, especially a rare but clinically significant cardiotoxicity with high rate of mortality. We studied the cytotoxic and pro-inflammatory properties of Ipilimumab and Nivolumab, the underlying pathways and cytokine storm involved. Methods: Co-cultures of human cardiomyocytes and lymphocytes were exposed to Ipilimumab or Nivolumab; cell viability and expression of leukotrienes, NLRP3, MyD88, and p65/NF-κB were performed. C57 mice were treated with Ipilimumab (15 mg/kg); analysis of fractional shortening, ejection fraction, radial and longitudinal strain were made before and after treatments through 2D-echocardiography. Expression of NLRP3, MyD88, p65/NF-κB, and 12 cytokines were analyzed in murine myocardium. Results: Nivolumab and Ipilimumab exert effective anticancer, but also significant cardiotoxic effects in co-cultures of lymphocytes and tumor or cardiac cells. Both ICIs increased NLRP3, MyD88, and p65/NF-κB expression compared to untreated cells, however, the most pro-inflammatory and cardiotoxic effects were seen after exposure to Ipilimumab. Mice treated with Ipilimumab showed a significant decrease in fractional shortening and radial strain with respect to untreated mice, coupled with a significant increase in myocardial expression of NLRP3, MyD88, and several interleukins. Conclusions: Nivolumab and Ipilimumab exert cytotoxic effects mediated by the NLRP3/IL-1β and MyD88 pathways, leading to pro-inflammatory cytokine storm in heart tissue.

Original languageEnglish
Article number179
Pages (from-to)1-19
Number of pages19
JournalJournal of Personalized Medicine
Issue number4
Publication statusPublished - Dec 2020


  • Cardioncology
  • Cardiotoxicity
  • Immune checkpoint inhibitors
  • Ipilimumab
  • Nivolumab

ASJC Scopus subject areas

  • Medicine (miscellaneous)


Dive into the research topics of 'Evidences of CTLA-4 and PD-1 blocking agents-induced cardiotoxicity in cellular and preclinical models'. Together they form a unique fingerprint.

Cite this