79 research outputs found
Quantitative evaluation of the beneficial effects in the mdx mouse of epigallocatechin gallate, an antioxidant polyphenol from green tea
In two separate previous studies, we reported that subcutaneous (sc) or oral administration of (−)-epigallocatechin-3-gallate (EGCG) limited the development of muscle degeneration of mdx mice, a mild phenotype model for Duchenne muscular dystrophy (DMD). However, it was not possible to conclude which was the more efficient route of EGCG administration because different strains of mdx mice, periods of treatment and methods of assessment were used. In this study, we investigated which administration routes and dosages of EGCG are the most effective for limiting the onset of dystrophic lesions in the same strain of mdx mice and applying the same methods of assessment. Three-week-old mdx mice were injected sc for 5 weeks with either saline or a daily average of 3 or 6 mg/kg EGCG. For comparison, age-matched mdx mice were fed for 5 weeks with either a diet containing 0.1% EGCG or a control diet. The effects of EGCG were assessed quantitatively by determining the activities of serum muscle-derived creatine kinase, isometric contractions of triceps surae muscles, integrated spontaneous locomotor activities, and oxidative stress and fibrosis in selected muscles. Oral administration of 180 mg/kg/day EGCG in the diet was found the most effective for significantly improving several parameters associated with muscular dystrophy. However, the improvements were slightly less than those observed previously for sc injection started immediately after birth. The efficacy of EGCG for limiting the development of dystrophic muscle lesions in mice suggests that EGCG may be of benefit for DMD patients
Quantitative histochemical investigations of semipermeable membrane techniques for the assay of acid phosphatase in skeletal muscle
Quantitative histochemical investigation of semipermeable membrane techniques for the assay of acid phosphatase in skeletal muscle
A fluorescent water soluable carbodiimide-2-hydroxy-3-naphthoic acid hydrozide reaction for the demonstration of carboxyl groups in proteins and mucosubstances
Studies in fluorescence histochemistry. VII. The mechanism of the complex reactions that may take place between protein carboxyl groups and hot mixtures of acetic anhydride and pyridine in the acetic anhydride-salicylhydrazide-zinc (or fluorescent ketone) method for localizing protein C-terminal carboxyl groups
Acid phosphatase activity in soleus and plantaris muscle fibres of normal and dystrophic hamsters
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