Changes in masseter muscle structure, membrane lipid peroxidation and Ca-ATPase activity as effects of different local anesthetics.

Local anesthetics (LA) can cause undesired effects such as sustained contraction of skeletal muscles as a result of structural and functional changes. Proper skeletal muscle function is controlled by intracellular Ca2+ concentration and efficient energy (ATP) production, which is closely related to cell ultrastructure. Aim: The aim of this study was to identify the structural and functional changes caused by LAs.

Expression of sarcoplasmic-endoplasmic reticulum Ca-ATPase isoforms in masticatory muscles.

The aim of this study was to characterize the sarcoplasmic-endoplasmic reticulum Ca-ATPase (SERCA) isoforms in rabbit masticatory muscles compared with those in fast-twitch muscle. It was hypothesized that combined expression of the SERCA isoforms in fast- and slow-twitch muscles accounts for lower Ca-ATPase activity. SERCA was isolated by differential centrifugation, the isoforms were determined by ELISA, and the activity of each isoform was measured using a colorimetric method.

Characterization of the sarcoplasmic reticulum Ca-ATPase from rabbit temporalis muscle.

Objective: The aim of this work was to isolate the sarcoplasmic reticulum (SR) Ca-ATPase from rabbit temporalis muscle and to determine the optimal conditions for calcium transport and enzymatic activity.

Design: SR vesicles were isolated from rabbit temporalis muscle by differential centrifugation, the protein composition analyzed by electrophoresis and compared to fast-twitch muscle membrane suspensions. ELISA was used to determine the sarcoendoplasmic reticulum Ca-ATPase (SERCA) isoform.

Effect of articaine on calcium transport in sarcoplasmic reticulum membranes isolated from medial pterygoid muscle.

Local anesthetics used in dentistry have myotoxic effects. Articaine, also known as carticaine, is one of the local anesthetics most widely used in clinical dentistry. The aim of this work was to describe its effect on the sarcoplasmic reticulum Ca-ATPase isolated from medial pterygoid muscle.