Brazilian Journal of Anesthesiology
https://app.periodikos.com.br/journal/rba/article/doi/10.1016/j.bjane.2018.06.008
Brazilian Journal of Anesthesiology
Scientific Article

The chondrotoxic and apoptotic effects of levobupivacaine and bupivacaine on the rabbit knee joint

Os efeitos condrotóxicos e apoptóticos de levobupivacaína e bupivacaína na articulação do joelho de coelhos

Osman Çevik; Özlem Öz Gergin; Karamehmet Yildiz; Adnan Bayram; Özlem Canöz; Mehmet Halici; Münevver Baran; Arzu Yay; Sait Polat

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Abstract

Abstract Background: A single dose injection or continuous infusion of local anesthetics into the joint space is considered to be a well-defined analgesia technique. The aim of this study was to investigate the chondrotoxic and apoptotic effects of single-dose intra-articular injection of levobupivacaine and bupivacaine on rabbit knee joint tissues. Materials and methods: The animals were allocated into two groups each containing 20 rabbits. 0.5% levobupivacaine (Group L) and 0.5% bupivacaine (Group B) were applied intra-articularly to the left posterior joints of rabbits. At the same time, normal saline was applied to the right posterior leg knee joints of rabbits in both groups and used as a control (Group S). At the end of the 7th and 28th days after the intraarticular injections, ten randomly chosen rabbits in each group were killed by applying intraperitoneal thiopental. Sections of cartilage tissue samples were stained for light microscopic examinations and the TUNEL method was used to investigate apoptotic cells. Results: As a result of immunofluorescence microscopic examination, the number of apoptotic cells in Group B at day 7 and day 28 were both significantly higher than Group L and S (p < 0.05). Also, the number of apoptotic cells in Group L at day 7 and day 28 were both significantly higher than Group S (p < 0.05). Conclusions: We found that bupivacaine is more chondrotoxic than other anesthetic agent and increases the number of apoptotic cells. These results indicated that bupivacaine caused high chondrotoxic damage and it led to more apoptotic activation than levobupivacaine.

Keywords

Apoptosis, Bupivacaine, Chondrotoxicity, Levobupivacaine, Local anesthetic

Resumo

Resumo Justificativa: Uma injeção em dose única ou infusão contínua de anestésicos locais no espaço articular é considerada uma técnica de analgesia bem definida. O objetivo deste estudo foi investigar os efeitos condrotóxicos e apoptóticos da injeção intra-articular com dose única de levobupivacaína e bupivacaína em tecidos articulares do joelho de coelho. Material e métodos: Os animais foram alocados em dois grupos, cada um contendo 20 coelhos. Levobupivacaína a 0,5% (Grupo L) e bupivacaína a 0,5% (Grupo B) foram aplicadas intra-articularmente nas articulações posteriores esquerdas de coelhos. Ao mesmo tempo, solução salina normal foi aplicada nas articulações do joelho da perna posterior direita de coelhos em ambos os grupos e usada como controle (Grupo S). Ao fim do 7° e 28° dias após as injeções intra-articulares, 10 coelhos escolhidos aleatoriamente em cada grupo foram mortos por aplicação de tiopental intraperitoneal. Seções de amostras de tecido cartilaginoso foram coradas para exames de microscopia de luz, e o método TUNEL foi usado para investigar células apoptóticas. Resultados: Como resultado do exame microscópico de imunofluorescência nos dias 7 e 28, o número de células apoptóticas no Grupo B foi significativamente maior que nos grupos L e S (p < 0,05). Além disso, o número de células apoptóticas nos dias 7 e 28 foi significativamente maior no Grupo L do que no Grupo S (p < 0,05). Conclusões: Demonstramos que a bupivacaína é mais condrotóxica do que o outro agente anestésico e aumenta o número de células apoptóticas. Esses resultados indicaram que a bupivacaína causou intensa lesão condrotóxica e levou a uma ativação apoptótica maior do que a levobupivacaína.

Palavras-chave

Apoptose, Bupivacaína, Condrotoxicidade, Levobupivacaína, Anestésico local

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