title: Plasmid DNA loaded chitosan nanoparticles for nasal mucosal immunization against hepatitis B.
abstract: This work investigates the preparation and in vivo efficacy of plasmid DNA loaded chitosan nanoparticles for nasal mucosal immunization against hepatitis B. Chitosan pDNA nanoparticles were prepared using a complex coacervation process. Prepared nanoparticles were characterized for size, shape, surface charge, plasmid loading and ability of nanoparticles to protect DNA against nuclease digestion and for their transfection efficacy. Nasal administration of nanoparticles resulted in serum anti-HBsAg titre that was less compared to that elicited by naked DNA and alum adsorbed HBsAg, but the mice were seroprotective within 2 weeks and the immunoglobulin level was above the clinically protective level. However, intramuscular administration of naked DNA and alum adsorbed HBsAg did not elicit sIgA titre in mucosal secretions that was induced by nasal immunization with chitosan nanoparticles. Similarly, cellular responses (cytokine levels) were poor in case of alum adsorbed HBsAg. Chitosan nanoparticles thus produced humoral (both systemic and mucosal) and cellular immune responses upon nasal administration. The study signifies the potential of chitosan nanoparticles as DNA vaccine carrier and adjuvant for effective immunization through non-invasive nasal route.
authors.affiliation: Drug Delivery Research Laboratory, Department of Pharmaceutical Sciences, Dr. Harisingh Gour Vishwavidyalaya, Sagar 470003, MP, India.
authors.forename: Kapil
authors.initials: K
authors.lastname: Khatri
authors.forename: Amit K
authors.initials: AK
authors.lastname: Goyal
authors.forename: Prem N
authors.initials: PN
authors.lastname: Gupta
authors.forename: Neeraj
authors.initials: N
authors.lastname: Mishra
authors.forename: Suresh P
authors.initials: SP
authors.lastname: Vyas
mesh_terms: D000281:Administration, Intranasal; D000534:Alum Compounds / Q000737:chemistry; D000818:Animals; D048271:Chitosan / Q000737:chemistry; D003850:Deoxyribonuclease I / Q000378:metabolism; D005260:Female; D006509:Hepatitis B / Q000276:immunology* / Q000517:prevention & control; D006510:Hepatitis B Antibodies / Q000097:blood / Q000187:drug effects; D007071:Immunoglobulin A, Secretory / Q000378:metabolism; D007273:Injections, Intramuscular; D051379:Mice; D008807:Mice, Inbred BALB C; D053758:Nanoparticles / Q000737:chemistry; D009297:Nasal Mucosa / Q000276:immunology* / Q000378:metabolism; D010316:Particle Size; D010957:Plasmids / Q000008:administration & dosage / Q000276:immunology; D014162:Transfection; D014611:Vaccination; D019444:Vaccines, DNA / Q000008:administration & dosage / Q000276:immunology*
chemical_list: D000534:Alum Compounds; D006510:Hepatitis B Antibodies; D007071:Immunoglobulin A, Secretory; D019444:Vaccines, DNA; D048271:Chitosan; D003850:Deoxyribonuclease I