| خلاصه مقاله | Background and Aim: Considering the important role of
collagenases in joint destruction and pathogenesis of osteoarthritis
(OA), this study aimed to investigate the effect of Lcarnitine
supplementation on serum collagenases in females
with knee OA.
Methods: In this clinical trial, 72 females with mild to moderate
knee OA were randomly divided into two groups to receive
750 mg/day L-carnitine (n=36) or placebo (n=36) for 8
weeks. Serum levels of collagenases-1 and -3 were assessed
before and after supplementation. Data were analyzed by
Wilcoxon signed rank test, Mann-Whitney’s U test, and analysis
of covariance.
Results: Only 69 patients (33 in the L-carnitine group and
36 in the placebo group) completed the study. Serum levels
of collagenase-1 decreased significantly in the L-carnitine
group (median percentage of changes [25th and 75th percentiles],
-19.10% [-46.05, 3.47], P<0.021), whereas it had no
change significantly in the placebo group (15.20% [-17.83,
93.76], P=0.381) after the supplementation period. Serum
levels of collagenase-3 (-7.28% [-46.31, 96.93], P=0.742) were
not changed significantly in the L-carnitine group after the
study. Moreover, no significant changes were observed in the
serum levels of collagenase-3 (median percentage changes
12.90% [-38.06, 104.67], P=0.561) in the placebo group after
the study. At the end of the study, the results of ANCOVA test
showed statistically significant differences between the two
groups only in serum collagenase-1 levels (P<0.006), adjusted
for baseline values and covariates.
Conclusion: Despite observed beneficial effects of L-carnitine
supplementation in decreasing serum levels of collagenase-
1 in knee OA patients, further studies are needed to
achieve concise conclusions. |