Objective To study the protection of L-ascorbic acid on mouse embryonic fibroblasts(NIH/ 3T3) from carcinogenic effects caused by nickel smelting smoke subjects.Methods The NIH/3T3 cells were divided into experimental and L-ascorbic acid in the intervention group.Plus exposure group concentration of nickel refining dusts were formulate 0.00,25.00,50.00,100.00 μg/ml suspension,the intervention group on the basis of the added exposure group containing L-ascorbic acid (100 mmol/L),contacted.Then,the cell viability was detected by MTT assay,we used Calcein-AM fluorescence probe to detect cell mitochondrial permeability transition pore (MPTP) changes,JC-1 staining to observe and detect the cell mitochondrial membrane potential (MMP) change,colorimetric quantitative to study the activity of mitochondrial respiratory chain complex Ⅰ,l,Ⅲ,Ⅳ.Results Upon 24 h incubation,both cell relative inhibition rate,openness of MPTP were increasing enhanced by different concentrations,on the other hand,MMP and the activity of mitochondrial respiratory chain complex Ⅰ,Ⅱ,Ⅳ were obviously decreased,the differences were statistically significant (P＜0.05).After L-ascorbic acid intervention treatment,the results of the intervention group were lower than that of the exposure group,and the difference was statistically significant (P＜0.05),indicating the protection of L-ascorbic acid on cell mitochondrial from the nickel exposure damage.Conclusion The damage effects of nickel on NIH/3T3 cell mitochondrial was significantly enhanced with the increasing concentration,and L-ascorbic acid has certain protection on cellular mitochondrial.

Objective To study the protection of L-ascorbic acid on mouse embryonic fibroblasts(NIH/ 3T3) from carcinogenic effects caused by nickel smelting smoke subjects.Methods The NIH/3T3 cells were divided into experimental and L-ascorbic acid in the intervention group.Plus exposure group concentration of nickel refining dusts were formulate 0.00,25.00,50.00,100.00 μg/ml suspension,the intervention group on the basis of the added exposure group containing L-ascorbic acid (100 mmol/L),contacted.Then,the cell viability was detected by MTT assay,we used Calcein-AM fluorescence probe to detect cell mitochondrial permeability transition pore (MPTP) changes,JC-1 staining to observe and detect the cell mitochondrial membrane potential (MMP) change,colorimetric quantitative to study the activity of mitochondrial respiratory chain complex Ⅰ,l,Ⅲ,Ⅳ.Results Upon 24 h incubation,both cell relative inhibition rate,openness of MPTP were increasing enhanced by different concentrations,on the other hand,MMP and the activity of mitochondrial respiratory chain complex Ⅰ,Ⅱ,Ⅳ were obviously decreased,the differences were statistically significant (P＜0.05).After L-ascorbic acid intervention treatment,the results of the intervention group were lower than that of the exposure group,and the difference was statistically significant (P＜0.05),indicating the protection of L-ascorbic acid on cell mitochondrial from the nickel exposure damage.Conclusion The damage effects of nickel on NIH/3T3 cell mitochondrial was significantly enhanced with the increasing concentration,and L-ascorbic acid has certain protection on cellular mitochondrial.

AIM: Yi Qi Yang Yin Decoction (YQYY) has been used to treat patients with rheumatoid arthritis (RA) and achieved good results in clinical applications, but the mechanism still needs to be explored. The purpose was to investigate the mechanism of YQYY in rats with collagen-induced arthritis. METHODS: The possible treatment target and signaling pathway were predicted by bioinformatics and network pharmacology analysis. Elisa,quantitative real-time polymerase chain reaction, and Western Blot were used to verify the mechanism of YQYY in treating RA. RESULTS: FABP4, MMP9 and PTGS2 were the most common predicational therapeutic targets. The results of pathology and CT showed that YQYY could improve ankle swelling, synovitis and bone erosion in CIA rats. Compared with the model group, YQYY or YQYY+MTX can significantly reduce the secretion of CRP, TNF-α, IL-1β and FABP4 in serum of CIA rats (P<0.05 or P<0.01), meanwhile, reduce the mRNA of FABP4, IKKα and p65 in synovial tissue (P<0.01), PPARγ was increased (P<0.01). YQYY could significantly reduce the expression of FABP4, IKKα and pp65 proteins in synovium, and suppress the activate of NF - κB signaling pathway. CONCLUSION: FABP4, MMP9 and PTGS2 may be the targets of YQYY decoction for RA treatment. YQYY can relieve joint symptoms in CIA rats, and regulate inflammation by inhibiting FABP4 / PPARγ/NF - κB signaling pathway, playing a role in the treatment of RA. The effect of YQYY combined with MTX was more prominent. This provided experimental evidence for the efficacy of YQYY decoction in clinical practice.

OBJECTIVE: To investigate the relationship between sleep parameters and suicidal ideation in patients with late-life depression (LLD). METHODS: Seventy-seven LLD patients over 60 years old from Sir Run Run Shaw Hospital of Zhejiang University during July 2017 and July 2018 were included in the study. All patients were assessed with Hamilton Depression Rating Scale (HAMD) and polysomnography (PSG) overnight. The suicidal score of item 3 in HAMD (HAM-D3)was used to define whether there was a suicidal ideation. Participants were subsequently grouped according to endorsement of presence (HAM-D3 score ≥1, =46) versus absence (HAM-D3 score=0, =31) of suicidal ideation symptoms. The sleep efficiency, total sleep time, wakefulness after sleep onset, rapid eye movement percent/latency, and non-rapid eye movement sleep stages 1-3 (N1-N3) were assessed. ANOVA analyses were conducted to explore the correlation of sleep parameters with suicidal ideation between the groups with and without suicidal ideation. In model 1, the HAM-D3 constituted the independent variable in separate ANOVA tests; in model 2 the impact of depressive symptoms were assessed as a covariate with sleep parameters. RESULTS: There was less stage N3 [(55±41)min, =-4.731, <0.05] and the reduced percentage of N3 [(15±11)%, =-4.194, <0.05] in LLD patients with suicidal ideation, compared with the LLD patients without suicidal ideation [(104±49) min, (26±11)%]. Correlation analyses revealed that there was a significant correlation between the suicidal ideation and the percentage of stage N3 and sleep time of stage N3 (both <0.05). CONCLUSIONS Suicidal ideation is associated with less N3 sleep in LLD patients.