Improvement of Mesenchymal Stem Cell Immunomodulatory Properties by Heat-Killed Propionibacterium acnes via TLR2

Autor(es)

Silveira, Gabriela da Paz ^[1] ; Ishimura, Mayari Eika ^[1] ; Teixeira, Daniela ^[1] ; Galindo, Layla Tesla ^[2] ; Sardinha, Agnes Araujo ^[2] ; Porcionatto, Marimelia ^[2] ; Longo-Maugeri, Ieda Maria ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Paulo, Paulista Sch Med, Dept Microbiol Immunol & Parasitol, Div Immunol, Sao Paulo - Brazil

^[2] Univ Fed Sao Paulo, Paulista Sch Med, Dept Biochem, Div Mol Biol, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: FRONTIERS IN MOLECULAR NEUROSCIENCE; v. 11, JAN 10 2019.
• Citações Web of Science: 0

Resumo

Mesenchymal stem cells (MSCs) are an essential tool for regenerative medicine, which aims to develop new technologies to improve their effects to obtain useful transplantation results. MSC immunomodulatory role has been just demonstrated; however, how they react when they are stimulated by an adjuvant is poorly understood. Our group showed the adjuvant effect of killed Propionibacterium acnes (P. acnes) on hematopoietic stem cells. As these cells share the same MSCs bone marrow (BM) site and interact with each other, here we evaluated the P. acnes and its soluble polysaccharide (PS) effect on MSCs and their immunomodulatory role in a murine model of traumatic brain injury (TBI). The bacteria increased the absolute number of MSCs, including MSC subpopulations, and maintained MSC plasticity. P. acnes and PS enhanced MSC proliferation and improved their immunomodulatory effect. P. acnes-MSC and PS-MSC transplantation increased anti-inflammatory cytokine expression and diminished pro-inflammatory cytokine expression after injury. This effect seemed to be mediated via TLR2 since P. acnes-KOTLR2-MSC transplantation decreased TGF-beta and IL-10 expression. Increasing in neural stem cells and neuroblasts after PS-MSC transplantation was also observed. The adjuvant effect of P. acnes is an alternative means of expanding MSCs and important to identify their subpopulations to know better their role under exogenous stimuli including inflammation resolution in an experimental model. (AU)

• Processo FAPESP: 14/25307-4 - Efeito adjuvante da Propionibacterium acnes e de sua fração polissacarídica purificada sobre a imunogenicidade de uma vacina para o vírus da imunodeficiência humana tipo 1 (HIV-1)
• Beneficiário: Ieda Maria Longo Maugéri
• Modalidade de apoio: Auxílio à Pesquisa - Regular