Cell cytotoxicity, immunostimulatory and antitumor effects of lipid content of liposomal delivery platforms in cancer immunotherapies. A comprehensive in-vivo and in-vitro study

Publication date: Available online 2 July 2019Source: International Journal of PharmaceuticsAuthor(s): Amin Reza Nikpoor, Mahmoud Reza Jaafari, Parvin Zamani, Manouchehr Teymouri, Hamed Gouklani, Ehsan Saburi, Shahrzad Amiri Darban, Ali Badiee, Ali Bahramifar, Mahdi Fasihi-Ramandi, Ramezan Ali TaheriAbstractLiposome is one of the promising technologies for antigen delivery in cancer immunotherapies. It seems that the phospholipid content of liposomes can act as immunostimulatory molecules in cancer immunotherapy. In the present study, the immunological properties of different phospholipid content of liposomal antigen delivery platforms were investigated. To this aim, F1 to F4 naïve liposomes (without tumor-specific loaded antigens) of positively charged DOTAP/Cholesterol/DOPE (4/4/4 mole ratio), negatively charged DMPC/DMPG/Cholesterol/ DOPE (15/2/3/5), negatively charged DSPC/DSPG/Cholesterol/DOPE (15/2/3/5) and PEGylated HSPC/mPEG2000-DSPE /Cholesterol (13/110) liposomal compositions were administered in mice bearing C26 colon carcinoma to assess tumor therapy. Moreover, In-vitro studies were conducted, including cytotoxicity assay, serum cytokines measurements, IFN-γ and IL-4 ELISpot assay, T cells subpopulation frequencies assay. The liposomes containing DOTAP and DOPE (F1 liposomes) were able to stimulate cytotoxic T lymphocytes signals such as IFN-γ secretions. In parallel, the aforementioned phospholipids stimulated secretion of IL-4 and IL-17 cytokines from T helpe...
Source: International Journal of Pharmaceutics - Category: Drugs & Pharmacology Source Type: research