Sinovite em equinos: efeito das células tronco mesenquimais sobre a inflamação articular
Carregando...
Data
2019-06-25
Autores
Rosa, Gustavo dos Santos
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Estadual Paulista (Unesp)
Resumo
A alta exigência do sistema locomotor de equinos atletas resulta em pequenas lesões articulares que, cumulativamente, provocam inflamação sinovial e liberação de diversos mediadores inflamatórios no microambiente articular, resultando no desenvolvimento da osteoartrite (OA). A utilização de células tronco mesenquimais (CTMs) nestes casos visa modificar a progressão desta enfermidade. O objetivo do presente trabalho foi verificar o comportamento das CTMs alogênicas derivadas da membrana sinovial (CTMms) frente aos eventos inflamatórios em casos de sinovite aguda em equinos. A sinovite foi induzida utilizando 0,5ng de LPS via intra-articular (IA) e os animais foram tratados 8 horas após a indução. O grupo controle recebeu como tratamento 2 ml de PBS IA, enquanto o grupo tratado recebeu 107 CTMms IA. Foram realizados, de maneira seriada, exames físicos, exames do aparelho locomotor, análise citológica do líquido sinovial e a determinação da concentração sinovial de TGF-β e PGE2. Não foram observadas diferenças entre os grupos quanto à claudicação e parâmetros do exame físico. A análise citológica revelou diminuição significativa de linfócitos e macrófagos no grupo tratado (P= 0,0059 e P= 0,0003, respectivamente) que também apresentou menores níveis de TGF-β (P= 0,0467) no momento 24h. Os demais parâmetros não apresentaram diferença significativa em nenhum momento. Os dados avaliados sugerem que a inflamação aguda tenha inicialmente causado inibição da capacidade imunomoduladora das CTMs, que foi retomada após 24h, com o declínio da inflamação articular, e que a interação das CTMs com os mediadores inflamatórios presentes no líquido sinovial está diretamente relacionada à condição inflamatória articular no momento da aplicação. Para a otimização do potencial imunomodulador das CTMs, os autores sugerem a adoção de estratégias para o controle da inflamação local antes de sua administração.
The high requirement of the locomotor system of equine athletes often results in small joint injuries that can cause synovial inflammation and release of several inflammatory mediators in the articular microenvironment, leading to the development of osteoarthritis (OA). Mesenchymal stem cells (MSCs) are used in these cases to modify the progression of this disease. This study aimed to verify the behavior of allogeneic synovial membrane derived MSCs (MSCsm) against inflammatory events in acute equine synovitis. Synovitis was induced by the intra-articular (IA) administration of 0.5 ng of LPS and the subjects were treated 8 hours post-induction. The control group received 2 ml of PBS IA as treatment, while the treated group received 107 MSCsm IA. Physical exams, lameness evaluations, cytological analysis of synovial fluid and determination of synovial concentrations of TGF-β and PGE2 were performed. No differences were observed in lameness and physical exam parameters between the groups. Cytological analysis revealed a significant decrease in lymphocytes and macrophages in the treated group (P = 0.0059 and P = 0.0003, respectively), which also had lower levels of TGF-β (P = 0.0467) at 24 h. The other parameters did not present significant difference at any time. Our data suggest that acute inflammation initially caused inhibition of the immunomodulatory capacity of MSCs, which was resumed after 24h with the decline of joint inflammation, and that the interaction of MSCs with the inflammatory mediators present in the synovial fluid is directly related to the condition inflammatory at the time of application. To optimize the immunomodulatory potential of MSCs, the authors suggest the adoption of strategies to control local inflammation prior to its administration.
The high requirement of the locomotor system of equine athletes often results in small joint injuries that can cause synovial inflammation and release of several inflammatory mediators in the articular microenvironment, leading to the development of osteoarthritis (OA). Mesenchymal stem cells (MSCs) are used in these cases to modify the progression of this disease. This study aimed to verify the behavior of allogeneic synovial membrane derived MSCs (MSCsm) against inflammatory events in acute equine synovitis. Synovitis was induced by the intra-articular (IA) administration of 0.5 ng of LPS and the subjects were treated 8 hours post-induction. The control group received 2 ml of PBS IA as treatment, while the treated group received 107 MSCsm IA. Physical exams, lameness evaluations, cytological analysis of synovial fluid and determination of synovial concentrations of TGF-β and PGE2 were performed. No differences were observed in lameness and physical exam parameters between the groups. Cytological analysis revealed a significant decrease in lymphocytes and macrophages in the treated group (P = 0.0059 and P = 0.0003, respectively), which also had lower levels of TGF-β (P = 0.0467) at 24 h. The other parameters did not present significant difference at any time. Our data suggest that acute inflammation initially caused inhibition of the immunomodulatory capacity of MSCs, which was resumed after 24h with the decline of joint inflammation, and that the interaction of MSCs with the inflammatory mediators present in the synovial fluid is directly related to the condition inflammatory at the time of application. To optimize the immunomodulatory potential of MSCs, the authors suggest the adoption of strategies to control local inflammation prior to its administration.
Descrição
Palavras-chave
terapia regenerativa, membrana sinovial, inflamação sinovial, regenerative therapy, synovial membrane, synovial inflammation