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Background & objectives: Human leucocyte antigen (HLA)-G plays a vital role in immunomodulation in rheumatoid arthritis (RA). The mounting evidence suggests a link between HLA-G gene polymorphisms, disease susceptibility and methotrexate treatment response. Various environmental factors influence the onset and progression of RA and its treatment outcomes. The aim is to identify the treatment response of HLA-G 3’ untranslated region polymorphisms to yoga-based lifestyle intervention (YBLI). Methods: In this eight-week single-blinded randomized controlled trial (CTRI/2017/05/008589), patients with RA (n=140) were randomized into two groups namely, yoga group or non-yoga group. Baseline genomic DNA was isolated using salting-out method. PCR-based methods were used for genotyping. The levels of soluble (s) HLA-G and disease activity were assessed by ELISA and disease activity score-28–erythrocyte sedimentation rate (DAS28-ESR), respectively, at baseline (day 0) and after eight weeks of intervention. Results: Low-producing sHLA-G genotypes, i.e. +3142GG and 14 bp ins/ins, showed a significant increase in sHLA-G levels after YBLI. The association analysis between HLA-G polymorphisms and treatment for RA showed no considerable differential treatment remission in either of the groups (P>0.05). The percentages of improvement were higher in the yoga group as compared to the non-yoga group in both the HLA-G +3142G>C and 14 bp ins/del polymorphisms irrespective of their respective genotypes. No significant association was found between sHLA-G levels and disease activity with respect to genotypes. Interpretation & conclusions: Yoga intervention results in improvement and reduced severity of RA in patients irrespective of the HLA-G 14 bp ins/del or +3142G>C polymorphisms. YBLI may be used as an adjunct therapy in RA independent of the genotypes
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Objective To explore the relationship between the HLA-G 14 bp insertion/deletion polymorphism and the infection of Epstein-Barr virus(EBV) for children.Methods The study genotyped HLA-G 14 bp insertion/deletion polymorphism of 102 infectious mononucleosis children and 165 normal controls by PCR-PAGE,detected the plasma sHLA-G level of 51 infectious mononucleosis children and 146 normal controls by ELISA.Results A significant difference was observed for the frequencies of the HLA-G 14 bp genotype between the two groups( x2 =6.742,P=0.034 ),and a significant difference was also observed for the 14 bp allele frequencies between the two groups( x2 =6.672,P=0.01 ).The plasma sHLA-G levels in the infectious mononucleosis children were dramatically higher than that in normal controls,and a significant difference was observed between the two groups( Z=-9.472,P＜0.01 ).Among the infectious mononucleosis children,levels of sHLA-G was find a significant difference between the three genotypes of HLA-G 14 bp insertion/deletion polymorphism( H=6.09,P =0.048 ),and the level of s HLA-G with 14 bp+/+ genotype was markedly lower than that of the two other genotypes (Z=-2.376,P=0.01 8).Conclusion There was a relationship between the HLA-G 14 bp insertion/deletion polymorphism and the susceptibility to the infectious mononucleosis for children.Children who carried the 14 bp-/- genotype or deleted the 14 bp allele may have a significantly increased risk of the infection of EBV.The plasma sHLA-G might be considered as an index for auxiliary diagnosis infectious mononucleosis.
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Objective To investigate the expression of serum sHLA-G in systemic lupus erythematosus (SLE) patients and the association with the disease activity.Methods The serum concentration of sHLA-G in SLE patients and healthy controls was measured with enzyme-linked immunosorbent assay.Results Significant higher sHLA-G levels were detected in patients of SLE than control group (P＜0.01),The serum concentrations of sHLA-G in active SLE patients were markedly higher than stable SLE patients (P＜0.01).The expression level of sHLA-G showed positive correlations with SLE activity index (SLEDAI)(r=0.30,P=0.01).There was no correlation between sHLA-G levels and serum concentration of Anti-dsDNA,C3,C4 and Anti-ANA in SLE patients (P＞0.05).Conclusion The level of serum sHLA-G is significantly increased in SLE patients.Positive correlations are observed between sHLA-G levels and SLEDAI.These data indicated that sHLA-G may play certain roles in the pathogenesis and progress in SLE.
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0.05).However,the patients with increased levels of sHLA-G had higher incidence of central nervous system involvement(P=0.007) and more severe disease activity(P=0.027) in comparison with patients with normal plasma sHLA-G levels.Finally,the expression of plasma sHLA-G was not influenced by the treatment with glucocorticoids,immunosuppressive agents or antimalarials.Conclusion The increased production of sHLA-G indicates that sHLA-G may play an important role in the pathogenesis of SLE.The expression of sHLA-G may be associated with disease activity and severity of lupus patients,but be independence of HLA-G 14bp ins/del polymorphism and drug treatment.