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Pulmonary delivery of a targeted mucosal nanocarrier vaccine for pneumonia

Grant number: 16/50413-8
Support type:Regular Research Grants
Duration: March 01, 2018 - August 31, 2021
Field of knowledge:Biological Sciences - Microbiology - Applied Microbiology
Cooperation agreement: MRC, UKRI
Principal researcher:Viviane Maimoni Gonçalves
Grantee:Viviane Maimoni Gonçalves
Principal researcher abroad: Imran Saleem
Institution abroad: Liverpool John Moores University (LJMU), England
Home Institution: Instituto Butantan. Secretaria da Saúde (São Paulo - Estado). São Paulo , SP, Brazil

Abstract

Streptococcus pneumoniae utilizes as a portal of entry into the body causing community acquired-pneumonia (CAP), bacteraemia, meningitis and sepsis (invasive pneumococcal disease, IPD). Current pneumococcal conjugate vaccine (PCV13) comprises 13 of the most common S. pneumoniase serotypes and is administered via the parental route resulting in low levels of lung mucosal immunity. Several trials indicated the efficacy of PCVs against CAP to be lower than IPD. Hence, pneumococcal disease to have a high burden due to limited protection against the total number of serotypes, variation in serotype distribution worldwide and the occurrence of non-vaccine serotype replacement in S. pneumoniase carriage. This led to development of protein antigens such as recombinant pneumococcal surface protein A (PspA), genetically detoxified pneumolysin (PdT) and PspA - PdT fusion protein. These proteins provide serotype independent protection in order to counter replacement disease. Moreover, delivery in a nanocarrier system directly to the lung dendritic cells (DCs) can enhance mucosal and systemic. We will investigate polymer- based nanoparticle (NPs) composed of two polymers in a layer-by-layer approach, as they are biodegradable and biocompatible with tissues/cells, promote the uptake of protein antigens by CDs and as adjuvants aiding in activating cellular and humoral immune responses, potentially reduce the quantity of antigen required and number of vaccine administrations. Lung mucosal immunization offers the advantage of needle-free vaccination, reducing blood-borne infections, and formulated as dry powders (DP) eliminates cold-chain requirements while maintaining antigen stability and integrity. The NPs will be formulated within biocompatible excipients (carbohydrates), amino acids, and combinations) generating DP nanocomposite microparticle carriers (NCMPs) of suitable size (1-5um) for deposition in the respirable tract. The excipients protect the NPs and against the shear forces and increased temperatures during spraying and aides in NPs dispersion in the lung lining fluid for targeting DCs and antigen stability during storage. LJMU will investigate NPs and NCMPs formulations with protein antigens provided by Institute Butantan. The optimum formulation will evaluated for cellular and humoral immune responses in mice, and protection against intranasal challenge of S. pneumoniase, compared to antigen alone at Institute Butantan. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
GRABARZ, FELIPE; LOPES, ALEXANDRE PAULO YAGUE; BARBOSA, FLAVIA FERREIRA; BARAZZONE, GIOVANA CAPPIO; SANTOS, JADEMILSON CELESTINO; BOTOSSO, VIVIANE FONGARO; JORGE, SORAIA ATTIE CALIL; NASCIMENTO, ANA LUCIA TABET OLLER; ASTRAY, RENATO MANCINI; GONCALVES, VIVIANE MAIMONI. Strategies for the Production of Soluble Interferon-Alpha Consensus and Potential Application in Arboviruses and SARS-CoV-2. LIFE-BASEL, v. 11, n. 6 JUN 2021. Web of Science Citations: 0.
EGUIA, FARA A. P.; MASCARELLI, DANIELE E.; CARVALHO, ENEAS; RODRIGUEZ, GRETEL R.; MAKIYAMA, EDSON; BORELLI, PRIMAVERA; LIEBERMAN, CELIA; HO, PAULO LEE; BARAZZONE, GIOVANA C.; GONCALVES, VIVIANE M. Development of recombinant human granulocyte colony-stimulating factor (nartograstim) production process in Escherichia coli compatible with industrial scale and with no antibiotics in the culture medium. Applied Microbiology and Biotechnology, v. 105, n. 1, p. 169-183, JAN 2021. Web of Science Citations: 0.

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