Establishment of a fast discriminant model with electronic nose for Polygonati Rhizoma mildew based on odor variation / 中国中药杂志

The odor fingerprint of Pollygonati Rhizoma samples with different mildewing degrees was analyzed and the relationship between the odor variation and the mildewing degree was explored. A fast discriminant model was established according to the response intensity of electronic nose. The α-FOX3000 electronic nose was applied to analyze the odor fingerprint of Pollygonati Rhizoma samples with different mildewing degrees and the radar map was used to analyze the main contributors among the volatile organic compounds. The feature data were processed and analyzed by partial least squares discriminant analysis(PLS-DA), K-nearest neighbor(KNN), sequential minimal optimization(SMO), random forest(RF) and naive Bayes(NB), respectively. According to the radar map of the electronic nose, the response values of three sensors, namely T70/2, T30/1, and P10/2, increased with the mildewing, indicating that the Pollygonati Rhizoma produced alkanes and aromatic compounds after the mildewing. According to PLS-DA model, Pollygonati Rhizoma samples of three mildewing degrees could be well distinguished in three areas. Afterwards, the variable importance analysis of the sensors was carried out and then five sensors that contributed a lot to the classification were screened out: T70/2, T30/1, PA/2, P10/1 and P40/1. The classification accuracy of all the four models(KNN, SMO, RF, and NB) was above 90%, and KNN was most accurate(accuracy: 97.2%). Different volatile organic compounds were produced after the mildewing of Pollygonati Rhizoma, and they could be detected by electronic nose, which laid a foundation for the establishment of a rapid discrimination model for mildewed Pollygonati Rhizoma. This paper shed lights on further research on change pattern and quick detection of volatile organic compounds in moldy Chinese herbal medicines.

[Therapeutic effect and mechanisms study of Bawei Xilei Powder on ulcerative colitis patients].

OBJECTIVE: To investigate the efficacy and mechanisms of Bawei Xilei Powder (BXP) in treating ulcerative colitis (UC). METHODS: Totally 103 patients with left hemicolon mild to moderate UC in the active phase at the outpatient clinics of West China Hospital from June 2009 to October 2010 were randomly assigned to the treatment group (55 cases) and the control group (48 cases). Patients in the treatment group were treated with BXP (adding 1 g in 60 mL worm boiled water) and those in the control group received by 50 mg/60 mL hydrocortisone edema solution (once every evening before sleep). The therapeutic course for all was 4 weeks. The disease activity degree (Mayo scoring), endoscopic, and histologic manifestations were compared between post-and pre-treatment in the two groups. The expression of toll-like receptor-4 (TLR4), nuclear factor-kappaB (NF-kappaB), and Occludin were detected. RESULTS: The clinical remission rate and the response rate in the treatment group were 78.2% and 89.1% respectively, higher than those of the control group (58.3% and 72.9%, P < 0.05).The endoscopically mucosal healing rate was 50.9% in the treatment group and 31.3% in the control group (P < 0.05). The histological remission rate and the effective rate in the treatment group were 32.7% and 65.5% respectively, but higher than those of the control group (27.1% and 58.3%, P > 0.05). The rate of adverse events was 3.8% in the treatment (occurred in 2 cases) and 4.3% in the control group (occurred in 2 cases, P > 0.05). Compared with pre-treatment, the expression of TLR4 and NF-kappaB p65 significantly decreased (P < 0.05), while the expression of Occludin significantly increased (P < 0.05). CONCLUSIONS: BXP was effective and safe in patients with active mild to moderate UC. Its effects might be involved in regulating the expression of inflammatory factors and enhancing mucosa barrier functions. ulcerative colitis; Bawei Xilei Powder; enema therapy

Inhibitory effect of polydatin on expression of toll-like receptor 4 in ischemia-reperfusion injured NRK-52E cells / 中国中药杂志

Polydatin is a monocrystaline compound isolated from Polygonum cuspidatum Sieb. et Zucc. (Polygonaceae) with biological properties, such as anti-inflammation, anti-oxidative and nephroprotective effects. Increasing number of studies have demonstrated the protective effect of polydatin on renal ischemia reperfusion injury. However, the possible mechanisms of this protection are not fully elucidated. This study aimed to investigate the effect of polydatin on ischemia-reperfusion induced expression of toll-like receptor4 (TLR4) in rat renal tubular epithelia cells (NRK-52E), and analyze the mechanism of polydatin on TLR4 signal pathway. The cultured NRK-52E cells were incubated in three gas incubators for a period of 6 h at hypoxia and 24h at reoxygenation to simulate the ischemia-reperfusion injury in vitro. TLR4 mRNA level was analyzed by real-time-PCR, and the protein expression of TLR4 and NF-κB by Western blotting, while TNF-α and IL-1β proteins expressions were detected by ELISA. Polydatin downregulated I/R induced mRNA and protein expressions of TLR4, and decreased the protein expression of NF-κB, TNF-α and IL-1β. The TLR4 blocker partially antagonized the effect of I/R on NF-κB signaling, and such inhibitory effect was markedly enhanced by polydatin. In the present study, polydatin protects NRK-52E cells from I/R injury possibly by relieving the inflammatory response through regulation of TLR4/NF-κB signaling pathway.

Effects of Bawei Xilei San on mice with oxazolone-induced colitis and the mechanisms / 中西医结合学报

Objective: To investigate the therapeutic effects of Bawei Xilei San (BWXLS), a compound traditional Chinese herbal medicine, on mice with oxazolone-induced colitis and to explore the mechanisms. Methods: Thirty-two BALB/c mice were randomly divided into 4 groups (8 for each): normal control group, untreated group, hydrocortisone group and BWXLS group. Except for the mice in the normal control group, all mice were intrarectally administered with 3.0% oxazolone to induce colitis. Then the mice in the normal control group and untreated group were administered with 0.9% carboxymethyl cellulose sodium solution. Mice in the BWXLS group were intrarectally administered with 0.2 mg/g BWXLS and hydrocortisone group with 0.02 mg/g respectively for 5 days. The body weight and stool consistency and occult or gross blood were recorded to calculate the disease activity index (DAI). The mice were sacrificed at the 6th day. The macroscopic and histological changes of the colon were evaluated. The expressions of Toll-like receptor 4 (TLR4), nuclear factor-kappaB (NF-kappaB), and epithelial tight junction protein occludin were assessed by immunohistochemical method. The level of tumor necrosis factor-alpha (TNF-alpha) in colonic mucosa was evaluated by enzyme-linked immunosorbent assay. Results: The DAI, and macroscopic and histological changes in the BWXLS group were improved as compared with those in the untreated group (P0.05). Conclusion: Up-regulating the expression of occludin and down-regulating the expressions of TLR4 and NF-kappaB, and hence inhibiting TNF-alpha expression and improving the mucosa barrier function may be part of the mechanisms of BWXLS in treating oxazolone-induced colitis in mice.

Expression and function of interleukin-23/17 axis in trinitrobenzene sulphonic acid induced colitis in mouse / 中华消化杂志

Objective To study the expression and the role of interleukin (IL)-23/IL-17 axis in colonic tissue of trinitrobenzene sulphonic acid (TNBS) induced eolitic mice.Methods Mice were divided into four groups:control (n=24),TNBS (n= 24),TNBS 48 hours + mlL-17 antibodies (n=24),TNBS 48 hours + normal rat blood-serum (n= 24).TNBS-induced colitis model was constructed.The mice in control group and TNBS colitis group were sacrificed at 24 hours,48 hours,7th day,respectively.In TNBS 48 hours + mlL-17 antibodies group and TNBS 48 hours + normal rat blood-serum group,a single injection with the polyclonal mlL-17 antibodies or serum were given intraperitoneally at two hours before enema with TNBS,respectively,and the mice were killed at 48 hours after enema with TNBS.The histological score of colon and myeloperoxidase (MPO) activity of colonic tissue were evaluated in each group.IL-23p19 and IL-17 concentrations in colonic tissue were measured by enzyme-linked immunosorbent assay (ELISA).Expression of nuclear factor (NF)-κBp65in colonic tissue was detected by immunohistochemistry method.Expression of IL-23p19,IL-17 and IL-12p35 mRNA in colonic tissue were detected by real-time fluorescent quantitative reverse transcriptase polymerase chain reaction (RT-PCR) with SYBR Green I.Results The protein levels of IL-23p19 in colonic tissue in TNBS colitis groups at 24 hours,48 hours and 7 days were (15.53±3.32),(31.16±4.98) and (14.03±3.56) ng/mg,respectively,and their mRNA level were (4.09±0.34),(3.39±0.46) and (6.54±1.82),respectively.The protein levels of IL-17 were (0.35±0.06),(0.38±0.08),and (0.26±0.05) ng/mg,respectively,and their mRNA level were (4.21±2.61),(2.65±0.91) and (5.63±1.43),respectively.The expression levels of IL-23p19 and IL-17 in colitis model were significantly higher than those in control group and the peak was at 48 hours.Moreover,expression of IL-23p19 and IL-17 and their mRNA were positively correlated to their mRNA levels.In TNBS 48 hours + mIL-17 antibodies group,the expression levels of NF-κBp65,the microscopic scores and MPO (1.86 % ± 0.36 %,0.63 ± 0.52,0.40 ± 0.03 U/g,respectively) were significantly lower than those in TNBS 48 hours group (4.35% ±0.37%,5.13±0.64,2.29±0.40 U/g tissue,respectively).Neutralization of IL-17 was significantly protected against TNBS-induced colonic inflammation and MPO and expression of NF-κB p65.The results indicated that neutralization of IL-17 significantly reduced colonic inflammation and suppressed NF-κBp65 activation.This protection occurred in the presence of equivalent induction of local IL-23 p19 and high levels of IL-12p35 in the polyclonal raiL-17 antibodies-treated mice.Conclusions IL-23/IL-17 axis plays a critical role at the early acute phase of TNBS-induced inflammation.IL-17 may represent a new target for therapeutic intervention for inflammatory bowel disease.

Effect of pioglitazone on oxazolone-induced colitis in mice / 中华消化杂志

Objective To investigate the effect of pioglitazone on oxazolone-induced colitis and to clarify the mechanism of apoptosis by Fas/Fas ligand(FasL). Methods Eighteen BALb/c mice of ulcerative colitis induced by oxazolone enema were equally allocated into 3 groups. The mice in group 1 were sacrificed 3 days after enema,lamina propria mononuclear cells(LPMC) were isolated from freshly obtained colonic specimens and treated in vitro with pioglitazone (40 ?mol/L),the annexin-V-FITC was used for detection of apoptosis,and Fas/FasL expression was assayed by flow cytometry. Meanwhile,untreated mice were served as normal controls. Mice in group 2 (control group) and 3 (experiment group) were treated with methylcellulose or pioglitazone(20 mg?kg -1 ?d -1 ) 3 days after enema and were administrated for consecutive 7 days. The colonic inflammation including disease activity index (DAI),macroscopic and histological changes,myeloperoxidase(MPO) activity and levels of interleukin (IL)-4,IL-5 were evaluated. Results Apoptosis of LPMC,expression of Fas and FasL in normal and colitis mucosa were 12.89?1.23,70.63?6.24,8.59?5.47 and 4.25?0.84,62.60?5.85,23.75?10.23,respectively. After treated with pioglitazone,both apoptosis of LPMC and expression of Fas increased,while FasL expression decreased (40.58?10.32,83.98?11.38 and 10.04?5.21 respectively). In group 2 and group 3,the macroscopic and microscopic score,MPO activity,IL-4 and IL-5 level were 2.50?0.55,8.83?0.75, 3.81?0.17,216.46?34.32,102.28?25.74 and 0.33 ?0.52,4.00?0.63,1.25?0.16,179.36?18.15,61.65?17.45,respectively. Conclusion The results indicate that pioglitazone treatment can significantly attenuate colonic inflammation,and it might be related to the apoptosis of LPMC through Fas and FasL.