Objective To investigate the dynamic changes of serum regulatory T cell(Treg cell)-related factors in patients with diabetic peripheral neuropathy(DPN)and their relationships with pain mediators.Methods A total of 140 patients with DPN were enrolled and divided into painful DPN group(36 patients)and painless DPN group(104 patients)based on the presence of neuropathic pain.The serum levels of Treg cell-related factors[interleukin-10(IL-10),transforming growth fac-tor-β1(TGF-β1),interleukin-35(IL-35)]and pain mediators[prostaglandin E2(PGE2),hista-mine(His),and 5-hydroxytryptamine(5-HT)]between the two groups were compared.Pearson cor-relation analysis was used to explore the correlations of the serum levels of IL-10,TGF-β1,and IL-35 with the levels of PGE2,His,and 5-HT in patients with DPN.Multiple linear regression analysis was conducted to investigate the influencing factors of pain intensity in patients with DPN.Results The serum levels of TGF-β1,PGE2,His,and 5-HT were higher,while the levels of IL-10 and IL-35 were lower in the painful DPN group than those in the painless DPN group(P＜0.05).Pearson correlation a-nalysis showed that IL-10 was negatively correlated with PGE2,His,and 5-HT(r=-0.781,-0.794,-0.714,P＜0.05);TGF-β1 was positively correlated with PGE2,His,and 5-HT(r=0.605,0.590,0.515,P＜0.05);IL-35 was negatively correlated with PGE2,His,and 5-HT(r=-0.727,-0.847,-0.727,P＜0.05).Multiple linear regression analysis revealed that IL-10,TGF-β1,and IL-35 were closely related to the pain intensity in patients with DPN and were influencing factors of painin-tensity(P＜0.05).Conclusion The serum levels of IL-10 and IL-35 in patients with DPN are negatively correlated with the levels of PGE2,His,and 5-HT,while the level of TGF-β1 is positive-ly correlated with these pain mediators.Furthermore,IL-10,TGF-β1,and IL-35 are closely related to the degree of neuropathic pain in patients with DPN.

Objective To analyze the genetic characterization of VP1 region of Coxsackie virus A10(CVA10)isolated from clinical specimens of hand, foot and mouth disease(HFMD) patients in Shandong Province. Methods Clinical specimens were collected from some of HFMD patients from 2008 to 2009. The virus was isolated by cell culture. Total RNA was extracted, and the VP1 genes of the isolates were amplified by reverse transcription-polymerase chain reaction (RT-PCR) and sequenced. The genotypes were identified by molecular typing method and bioinformatics analysis.Homologous comparison and phylogenetic analysis of representative CVA10 strains were performed.Homologous comparison between the Shandong isolates and strains obtained from GenBank were performed and phylogenetic analysis of some representative CVA10 strains were performed. Results Three hundred and thirty viruses strains were isolated from 760 clinical specimens collected from HFMD patients, and 17 of them were identified as CVA10. The homologies of nucleotide and amino acid of the 17 CVA10 strains were 82.3%-100.0% and 94.2%-100.0%, respectively. Compared with the prototype strain of CVA10 (Kowalik/USA/2003), the homologies of nucleotide and amino acid were 75.6%-76.8% and 90.2%-93.2%, respectively. Interestingly, Shandong CVA10 strains were clustered into two distinct subgroups in the phylogenetic tree. Conclusions CVA10 is one of the causative agents of HFMD. Two independently circulating subgroups of CVA10 exist in Shandong province.