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2018 ; 13
(6
): 1096-1106
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gab.com Text
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Myelotomy promotes locomotor recovery in rats subjected to spinal cord injury: A
meta-analysis of six randomized controlled trials
#MMPMID29926838
Qin C
; Zhang WH
; Yang DG
; Yang ML
; Du LJ
; Li JJ
Neural Regen Res
2018[Jun]; 13
(6
): 1096-1106
PMID29926838
show ga
OBJECTIVE: To investigate the effects of myelotomy on locomotor recovery in rats
subjected to spinal cord injury. DATA SOURCES: Electronic databases including
PubMed, Science Citation Index, Cochrane Library, China National Knowledge
Infrastructure, Chinese Journals Full-text Database, China Biology Medicine disc,
and Wanfang Database were searched to retrieve related studies published before
September 2017. The MeSH terms (the Medical Subject Headings) such as
"myelotomy", "spinal cord injuries", "rats", "randomized controlled trial" and
all related entry terms were searched. DATA SELECTION: Randomized controlled
trials using myelotomy for the treatment of acute spinal cord injury in rats were
included. Basso, Beattie, and Bresnahan scores were adopted as the evaluation
method. RevMan Software (version 5.3) was used for data processing. The ?(2) and
I(2) tests were used to assess heterogeneity. Using a random-effects model, a
subgroup analysis was conducted to analyze the source of the heterogeneity.
OUTCOME MEASURES: Basso, Beattie, and Bresnahan scores were observed 1-6 weeks
after spinal cord injury. RESULTS: Six animal trials were included, using a total
of 143 lab rats. The included trials were divided into two subgroups by injury
degrees (moderate or severe). The pooled results showed that, 1-6 weeks after
spinal cord injury, the overall Basso, Beattie, and Bresnahan score was
significantly higher in the myelotomy group than in the contusion group (weighted
mean difference (WMD) = 0.60; 95% confidence interval (CI): 0.23-0.97; P = 0.001;
WMD = 2.10; 95% CI: 1.56-2.64; P < 0.001; WMD = 2.65; 95% CI: 1.73-3.57; P <
0.001; WMD = 1.66; 95% CI: 0.80-2.52; P < 0.001; WMD = 2.09; 95% CI: 0.92-3.26, P
< 0.001; WMD = 2.25; 95% CI: 1.06-3.44, P < 0.001). The overall heterogeneity was
high (I(2) = 85%; I(2) = 95%; I(2) = 94%; I(2) = 88%; I(2) = 91%; I(2) = 89%).
The results in the moderate injury subgroup showed that Basso, Beattie, and
Bresnahan scores were significantly higher in the myelotomy group than in the
contusion group (WMD = 0.91, 95% CI: 0.52-1.3, P < 0.001; WMD = 2.10; 95% CI:
1.56-2.64, P < 0.001; WMD = 2.65; 95% CI: 1.73-3.57, P < 0.001; WMD = 2.50, 95%
CI: 1.72-3.28, P < 0.001; WMD = 3.29, 95% CI: 2.21-4.38, P < 0.001; WMD = 3.27;
95% CI: 2.31-4.23, P < 0.001). The relevant heterogeneity was low. However, there
were no significant differences in Basso, Beattie, and Bresnahan scores between
the myelotomy and contusion groups in the severe injury subgroup at 2 and 3 weeks
after the injury (P = 0.75; P = 0.92). CONCLUSION: : To date, this is the first
attempt to summarize the potential effect of myelotomy on locomotor recovery in
rats with spinal cord injury. Our findings conclude that myelotomy promotes
locomotor recovery in rats with spinal cord injury, especially in those with
moderate injury.