Objective:To investigate the serum level and significance of complement factor B (CFB) and complement factor D (CFD) in patients with type 2 diabetes mellitus (T2DM) and diabetic peripheral neuropathy (DPN).Methods:From October 2019 to October 2020, 110 patients with T2DM in the endocrinology department of Affiliated Hospital of Jining Medical College were divided into DPN group ( n=60) and simple T2DM group ( n=50) according to whether or not DPN was combined. In addition, 52 cases of physical examination population in the physical examination center in the same period were selected as the normal control group ( n=52). The serum levels of CFB, CFD and tumor necrosis factor-α (TNF-α) were measured by enzyme linked immunosorbent assay (ELISA). The correlation between CFB, CFD and clinical indexes was analyzed, and the influencing factors of DPN were analyzed by logistic regression. Results:The serum levels of CFB and CFD in DPN group were higher than those in T2DM group and normal control group [CFB: (845.43±101.10)μg/ml vs (792.19±116.59)μg/ml, (739.20±123.43)μg/ml, P<0.05], [CFD: (491.71±41.03)mg/L vs (467.58±45.16)mg/L, (445.16±50.47)mg/L, P<0. 05]. Pearson correlation analysis showed that the serum level of CFB was positively correlated with glycosylated hemoglobin (HbA 1c), fasting plasma glucose (FPG) and TNF-α (all P<0.05) and negatively correlated with triiodothyronine (FT3) and total bilirubin (TBIL) (all P<0.05). Serum CFD level was positively correlated with systolic blood pressure, HbA 1c, FPG and TNF-α (all P<0.05), but negatively correlated with FT3 and TBIL (all P<0.05). Logistic regression analysis showed that CFB and CFD were still influential factors for the occurrence and development of DPN after excluding confounding factors such as systolic blood pressure, HbA 1c, FPG, FT3, DBIL, TBIL and TNF-α. Conclusions:(1) Serum CFB and CFD levels were significantly increased in DPN patients, suggesting that CFB and CFD may be involved in the occurrence and development of DPN. (2) Serum TNF-α level was significantly increased in DPN patients, confirming the role of TNF-α in the pathogenesis of DPN.

OBJECTIVETo assess the association of single nucleotide polymorphisms (SNPs) of NLRP3 gene with metabolic syndrome (MetS).

METHODSA total of 885 subjects including 410 MetS patients and 475 healthy controls were recruited. MetS was defined based on the National Cholesterol Education Program in Adult Treatment Panel III criteria. Two common SNPs of the NLRP3 gene, rs10754558 and rs4612666, were detected using polymerase chain reaction-restriction fragment length polymorphism method.

RESULTSThe frequencies of G allele and GG genotype of the NLRP3 rs10754558 in the MetS group were significantly higher than those of the control group. Logistic regression analysis showed that the GG genotype (OR=2.223, 95%CI: 1.296-6.924, P=0.00034) and G allele (OR=1.440, 95%CI: 1.189-4.063, P=0.00028) were associated with increased risk of MetS. NLRP3 rs10754558 GG genotype was associated with higher level of insulin resistance and visceral adiposity index. No association of NLRP3 rs4612666 SNPs with susceptibility to MetS was identified in this population.

CONCLUSIONNLRP3 gene rs10754558 polymorphisms are associated with increased risk of MetS. The G allele and genotype GG are risk factors for MetS.

Adult ; Aged ; Carrier Proteins ; genetics ; Female ; Genotype ; Humans ; Insulin Resistance ; Logistic Models ; Male ; Metabolic Syndrome ; etiology ; genetics ; Middle Aged ; NLR Family, Pyrin Domain-Containing 3 Protein ; Polymorphism, Single Nucleotide