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

作　　者：Kübra Kelleci Adil Allahverdiyev Melahat Bağırova Murat Ihlamur EmrahŞefik Abamor 

机构地区：[1]Department of Bioengineering,Yildiz Technical University,Istanbul,Turkey [2]V.Akhundov National Scientific Research Medical Prophylactic Institute,Baku,Azerbaijan [3]Department of Electronics and Automation,Biruni University,Istanbul,Turkey

出　　处：《Asian Pacific Journal of Tropical Biomedicine》2024年第8期359-368,共10页亚太热带生物医学杂志（英文版）

摘　　要：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 adjuvant.Methods:The water/oil/water binary emulsion solvent evaporation method was used to synthesize antigen-loaded PCL nanoparticles.Particles were characterized by scanning electron microscopy and zeta potential measurements.Their cytotoxicity in J774 macrophages in vitro was determined by MTT analysis.In addition,the amount of nitric oxide and the level of cytokines produced by macrophages were determined by Griess reaction and ELISA method,respectively.The protective effect of the developed formulations was evaluated by determining the infection index percentage in macrophages infected with Leishmania infantum.Results: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,respectively.Additionally,the vaccine formulations promoted the production of IFN-γand IL-12.SLA 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 group.Conclusions: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 properties.Therefore,PCL-based 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 

分 类 号：R531.6[医药卫生—内科学] R318[医药卫生—临床医学]