#Recombinant laminin-511 (BG iMatrix-511) ; #RL511 ;
Int J Mol Sci. 2024 Apr 2;25(7):3950.
Mathumathi Krishnamohan 1, Irena Kaplanov 1, Sapir Maudi-Boker 1, Muhammad Yousef 1, Noy Machluf-Katz 1, Idan Cohen 2, Moshe Elkabets 1, Jaison Titus 1, Marina Bersudsky 1, Ron N Apte 1, Elena Voronov 1, Alex Braiman 1
Affiliations expand
- PMID: 38612760
- PMCID: PMC11011794
- DOI: 10.3390/ijms25073950
Abstract
IL-1α is a dual function cytokine that affects inflammatory and immune responses and plays a pivotal role in cancer. The effects of intracellular IL-1α on the development of triple negative breast cancer (TNBC) in mice were assessed using the CRISPR/Cas9 system to suppress IL-1α expression in 4T1 breast cancer cells. Knockout of IL-1α in 4T1 cells modified expression of multiple genes, including downregulation of cytokines and chemokines involved in the recruitment of tumor-associated pro-inflammatory cells. Orthotopical injection of IL-1α knockout (KO) 4T1 cells into BALB/c mice led to a significant decrease in local tumor growth and lung metastases, compared to injection of wild-type 4T1 (4T1/WT) cells. Neutrophils and myeloid-derived suppressor cells were abundant in tumors developing after injection of 4T1/WT cells, whereas more antigen-presenting cells were observed in the tumor microenvironment after injection of IL-1α KO 4T1 cells. This switch correlated with increased infiltration of CD3+CD8+ and NKp46+cells. Engraftment of IL-1α knockout 4T1 cells into immunodeficient NOD.SCID mice resulted in more rapid tumor growth, with increased lung metastasis in comparison to engraftment of 4T1/WT cells. Our results suggest that tumor-associated IL-1α is involved in TNBC progression in mice by modulating the interplay between immunosuppressive pro-inflammatory cells vs. antigen-presenting and cytotoxic cells.