CCR2-targeted Micelles for Anti-cancer Peptide Delivery and Immune Stimulation
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Signaling between the CC chemokine receptor 2 (CCR2) with its ligand, monocyte chemoattractant protein-1 (MCP-1) promotes cancer progression by directly stimulating tumor cell proliferation and downregulating the expression of apoptotic proteins. Additionally, the MCP-1/CCR2 signaling axis drives the migration of circulating monocytes into the tumor microenvironment, where they mature into tumor-associated macrophages (TAMs) that promote disease progression through induction of angiogenesis, tissue remodeling, and suppression of the cytotoxic T lymphocyte (CTL) response. In order to simultaneously disrupt MCP-1/CCR2 signaling and target CCR2-expressing cancer cells for drug delivery, KLAK-MCP-1 micelles consisting of a CCR2-targeting peptide sequence (MCP-1 peptide) and the apoptotic KLAKLAK peptide were synthesized. In vitro, KLAK-MCP-1 micelles were observed to bind and induce cytotoxicity to cancer cells through interaction with CCR2. In vivo, KLAK-MCP-1 micelles inhibited tumor growth (34 ± 11%) in a subcutaneous B16F10 murine melanoma model despite minimal tumor accumulation upon intravenous injection. Tumors treated with KLAK-MCP1 demonstrated reduced intratumor CCR2 expression and altered infiltration of TAMs and CTLs as evidenced by immunohistochemical and flow cytometric analysis. These studies highlight the potential application of CCR2-targeted nanotherapeutic micelles in cancer treatment.
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Liu X, Ren Z, Tan C, Nunez-Santana F, Kelly M, Yan Y J Clin Invest. 2024; 134(22).
PMID: 39545417 PMC: 11563681. DOI: 10.1172/JCI179527.
Oral delivery of nanomedicine for genetic kidney disease.
Huang Y, Wang J, Mancino V, Pham J, OGrady C, Li H PNAS Nexus. 2024; 3(5):pgae187.
PMID: 38807632 PMC: 11131023. DOI: 10.1093/pnasnexus/pgae187.
New insights into the role of macrophages in cancer immunotherapy.
Zhou L, Zhao T, Zhang R, Chen C, Li J Front Immunol. 2024; 15:1381225.
PMID: 38605951 PMC: 11007015. DOI: 10.3389/fimmu.2024.1381225.
Cheng L, Yu J, Hao T, Wang W, Wei M, Li G Pharmaceutics. 2023; 15(11).
PMID: 38004600 PMC: 10675796. DOI: 10.3390/pharmaceutics15112622.
Nanoparticle-based drug delivery systems to enhance cancer immunotherapy in solid tumors.
Zhang J, Wang S, Zhang D, He X, Wang X, Han H Front Immunol. 2023; 14:1230893.
PMID: 37600822 PMC: 10435760. DOI: 10.3389/fimmu.2023.1230893.