Controlling cancer-induced inflammation with a nucleic acid scavenger prevents lung metastasis in murine models of breast cancer.

Journal Article (Journal Article)

Tumor cells release nucleic acid-containing proinflammatory complexes, termed nucleic acid-containing damage-associated molecular patterns (NA DAMPs), passively upon death and actively during stress. NA DAMPs activate pattern recognition receptors on cells in the tumor microenvironment leading to prolonged and intensified inflammation that potentiates metastasis. No strategy exists to control endogenous or therapy-induced inflammation in cancer patients. We discovered that the generation 3.0 polyamidoamine dendrimer (PAMAM-G3) scavenges NA DAMPs and mitigates their proinflammatory effects. In this study, we tested if the nucleic acid scavenger (NAS) PAMAM-G3 reduces lung metastasis in murine models of breast cancer. Our data indicate that PAMAM-G3 treatment decreases cell-free DNA levels and reduces lung metastasis in the experimental intravenous tumor-injection model and the postsurgical tumor-resection model of 4T1 breast cancer. Reduction in lung metastasis is associated with reduction in inflammatory immune cell subsets and proinflammatory cytokine levels in the tumor and the periphery. This study is the first example of NAS-mediated inhibition of metastasis to the lung. The study results provide a strong rationale for inclusion of NAS therapy in women with breast cancer undergoing standard-of-care surgery.

Full Text

Duke Authors

Cited Authors

  • Holl, EK; Frazier, V; Landa, K; Boczkowski, D; Sullenger, B; Nair, SK

Published Date

  • May 5, 2021

Published In

Volume / Issue

  • 29 / 5

Start / End Page

  • 1772 - 1781

PubMed ID

  • 33348055

Pubmed Central ID

  • PMC8116567

Electronic International Standard Serial Number (EISSN)

  • 1525-0024

Digital Object Identifier (DOI)

  • 10.1016/j.ymthe.2020.12.026


  • eng

Conference Location

  • United States