Objective:To evaluate a Meta-analysis of randomized controlled trials ( RCTs) in multiple sclerosis ( MS) patients to evaluate the efficacy of vitamin D as add-on therapy. Methods: Searched Pubmed,EMbase,the Cochrane Library,CNKI,Wanfang Data base and so on up to february 2016 using the keywords:multiple sclerosis or MS and the drug names:vitamin D orCholecalciferol. Two authors independently selected the articles and extracted the data. We performed meta-analysis using Review Manager ( RevMan) version 5. 3 software. Results:Four RCTs with a total of 247 patients were selected.①Compared to the placebo, the EDSS score[MD=-0. 33,95% Confidence interval (CI)= (0. 68,0. 01),P=0. 05],the annual relapse rate[MD=-0. 08, 95%CI=(-0.37,0.21),P=0.60]and the number of gadolinium-enhancing lesions[MD=-0.16,95%CI=(-0.57,0.25),P=0. 45] showed no significant difference at 12 months,meanwhile the EDSS score[MD=-0. 48,95%CI=(0. 87,-0. 09),P=0. 02] and the annual relapse rate[MD=-0. 27,95%CI=(-0. 52,-0. 02),P=0. 03] were significantly less in the vitamin D group at 24 months.②Safety evaluation:There was no hypercalcaemia in vitamin D treated patients in each studies,main adverse events reported were diarrhoea, fever, constipation, dyspepsia, headache and so on. These symptoms were mild, after stopping drug can relieve the general. Conclusion: Vitamin D as an added in the treatment of MS showed as same as the placebo in some clinical indicators. However,after a longer treatment, the clinical indicators were significantly lower in the vitamin D group. Due to limited quantity and quality of the included studies,further larger and more prolonged studies are merited to verify the above conclusion.

To describe a novel particles surface display system which is consisted of gram-positive enhancer matrix (GEM) particles and anchor proteins for bacteria-like particles vaccines, we treated Lactobacillus rhamnosus GG bacteria with 10% heated-TCA for preparing GEM particles, and then identified the harvested GEM particles by electron microscopy, RT-PCR and SDS-PAGE. Meanwhile, Escherichia coli was induced to express hybrid proteins PA3-EGFP and P60-EGFP, and GEM particles were incubated with them. Then binding of anchor proteins were determined by Western blotting, transmission electron microscopy, fluorescence microscopy and spectrofluorometry. GEM particles preserved original size and shape, and proteins and DNA contents of GEM particles were released substantially. The two anchor proteins both had efficiently immobilized on the surface of GEM. GEM particles that were bounded by anchor proteins were brushy. The fluorescence of GEM particles anchoring PA3 was slightly brighter than P60, but the difference was not significant (P>0.05). GEM particles prepared from L. rhamnosus GG have a good binding efficiency with anchor proteins PA3-EGFP and P60-EGFP. Therefore, this novel foreign protein surface display system could be used for bacteria-like particle vaccines.