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Immunomodulatory activity of polycaprolactone nanoparticles with calcium phosphate salts against Leishmania infantum infection

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Asian Pacific Journal of Tropical Biomedicine 2024年第8期14卷 359-368页

作者： Kübra Kelleci Adil Allahverdiyev melahat ba.ırova Murat Ihlamur EmrahŞefik Aba.or Department of Bioengineering Yildiz Technical UniversityIstanbulTurkey V.Akhundov National Scientific Research Medical Prophylactic Institute BakuAzerbaijan Department of Electronics and Automation Biruni UniversityIstanbulTurkey

Objective:To prepare and characterize polycaprolactone(PCL)nanoparticles loaded with sonicator fragmented(SLA)and freeze-thaw Leishmania antigens(FTLA)and to investigate the in vitro immunogenicity of antigen-encapsulated nanoparticles with calcium phosphate ***:The water/oil/water binary emulsion solvent evaporation method was used to synthesize antigen-loaded PCL *** were characterized by scanning electron microscopy and zeta potential *** cytotoxicity in J774 macrophages in vitro was determined by MTT *** addition,the amount of nitric oxide and the level of cytokines produced by macrophages were determined by Griess reaction and ELISA method,*** protective effect of the developed formulations was evaluated by determining the infection index percentage in macrophages infected with Leishmania ***:Compared to the control group,SLA PCL and FTLA PCL nanoparticles with calcium phosphate adjuvant induced a 6-and 7-fold increase in nitric oxide,***,the vaccine formulations promoted the production of IFN-γand *** PCL and FTLA PCL nanoparticles combined with calcium phosphate adjuvant caused an approximately 13-and 11-fold reduction in infection index,respectively,compared to the control ***:The encapsulation of antigens obtained by both sonication and freeze-thawing into PCL nanoparticles and the formulations with calcium phosphate adjuvant show strong in vitro immune stimulating ***,PCL-ba.ed antigen delivery systems and calcium phosphate adjuvant are recommended as a potential vaccine candidate against leishmaniasis.

关键词： Leishmaniasis Calcium phosphate Polycaprolactone Nanoparticle Antigen delivery system Adjuvant Vaccine design

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