Toll-like receptors is a super-family of pathogen recognition-receptors discovered in recent years.During the process of ischemia-reperfusion, the Toll-like receptor 4 (TLR4) combines with lipopolysaccharide and many endogenous ligands such as high mobility group protein B1, heparan sulfate, and fibrinogen. Through the myeloid differentiation protein 88 -dependent and -independent signaling pathways, the products induce the release of inflammatory cytokine-mediated inflammatory response, leading to injuries. ω-3 polyunsaturated fatty acids, by inhibiting the signal pathway activation and target gene expression of TLR4, can influence the function of many immune cells and regulate the body's inflammatory response and immune function. This article reviews the function of TLR4 during ischemia-reperfusion injury and the possible interventional role of ω-3 polyunsaturated fatty acids.

In the present paper, it is reported that immunelogic event during unset of experimehtaleallrgic encephalomyelitis (EAE) is studied by sevaeral immunological parameters, including thymectomy at birth in Guinea Pigs, identification of various cellular and humoral immunolo-gic functions. It is observed that thymectomy at birth suppressed onset of EAE and severityof EAE is related to cellular immunologic function but not to humoral immunity. All ofthese results indicated that cell-mediated immunity is responsible for the onset of EAE.

Objective To investigate the expression of high mobility group box 1 (HMGBI) of TLR4 endogenous ligand and distant organ tissue injury after intestine ischemia/reperfusion and drainage of lymph fluid in rats. Methods Twenty-four Sprague-Dawley (SD) male rats (SPF grade) were evenly divided into 3 groups:Sham surgery group,intestine ischemia-reperfusion (I/R) group,and intestine ischemia-reperfusion with drainage of intestine lymph fluid (IR + drainage) group.The injury of distant organs such as lungs,liver,kidney was evaluated;The expression of high mobility group box 1 (HMGBI) of TLR4 endogenous ligand in intestine,lung and liver after the ischemia-reperfusion injury was measured by immunohistochemistry.Result HE stained sections,as well as HMGB1 immunohistochemistry results showed that the injury of ischemia/reperfusion (I/R) group and ischemia/reperfusion (I/R) + drainage group were more severe than that in the sham group.A large number of cells stained in I/R group,indicating that HMGB1 expression increased.The injury in I/R + drainage group was significantly less severe than I/R group.Western blot tests showed that the expression of HMGB1 in jejunum,ileum,liver,lung increased significantly in I/R group after L/R injury.Gray-scale values of HMGB1/β-actin were 0.3145 ± 0.0549、 1.7352 ± 0.3280、1.4443 ± 0.0926、3.1382 ± 0.4202.Lymph drainage significantly alleviated the damage,the expression of HMGB1 were significantly lower (P ＜0.05).Gray-scale values of HMGB1/β-actin were 0.1745 ± 0.0327、 1.1083 ± 0.2098、 1.1862 ± 0.1221、2.1095 ± 0.1993. Conclusion Increased expression of HMGB1 of TLR4 endogenous ligand is associated with intestinal and distant tissue injury during intestinal ischemia-reperfusion injury.Drainage of lymph fluid can block the gutlymph pathway and thus reduce the source of HMGB1 from the intestinal as well as the injury of distant tissue.

OBJECTIVE: To establish the HPLC method for the content determination of baicalin in Xiaoer zhike granule. METHODS: YWG C18 (150 mm?4.6 mm,10 ?m) column was used and the mobile phase consisted of methnol-water-phosphoric acid (47 ∶ 53 ∶ 0.2) with the flow rate of 2.5 mL?min-1. The detection wavelength was set at 280 nm and injection volume was 10 ?L. RESULTS: The linear range of baicalin was 25～200 ?g?mL-1(r=0.999 6) with an average recovery of 99.57%(RSD=1.9%,n=6). CONCLUSION: This method is sensitive, simple and accurate for the quality control of Xiaoer zhike granule.

OBJECTIVE:To establish a HPLC method for the determination of main component and the related substances in pirenoxinum natricum eye drops. METHODS: A Inertsil C8-3 column was used with pH2.2 perchloric acid-methanol (35∶65) as mobile phase at a flow of 1.0 mL?min-1. The detection wavelength was 230 nm and the sample size was 10 ?L. RESULTS: Pirenoxinum natricum and the related substances could be baseline separated. The calibration curve was linear in the range of 49.5～990 ng(r=0.999 9). The detection limits was 89.3 pg, and average recovery was 99.1%, RSD was 0.42%. CONCLUSIONS: This method is rapid, accurate sensitive and can be used for the quality control of pirenoxinum natricum eye drops.

In cooperation with a District Health Station of Beijing, 13 nurseries were selected for the study of the practice of diet planning. At the beginning, the health workers of the selected nurseries -were gathered together at the station to attend a short-term class. Lectures were given on the basic knowledge of child nutrition, the methods of dietary survey and diet planning, i.e. using the proper amount of the cheaper but more nutritive foods to make essentially balanced diets according to the RDA. The health workers of the nurseries meet and comunicate once a month at the health station to calculate the monthly food consumption and the average daily intake of the nutrients of the children in the past month and to make plan for the next month. The body weight of the children were measured every month and the height at three months intervals. The data collected in 12 months were summarized. The results indicated that the yearly average intake of most nutrients by the children increased and their collective growth level in weight and height increased correspondingly during the one year period of diet planning without any increase of the boarding expense of the children.

Objective: To assess the potential significance of proliferating cell nuclear antigen (PCNA) labelling indexes (PCNA-LI) and AgNORs number in evaluation of proliferative activity of Wilms′ tumor. Methods: A silver staining for AgNORs and an immunohistochemical method PCNA staining were performed on the biopsy specimens taken from 34 children with Wilms′ tumor. Results: No significant differences were observed between PCNA-LI and the pathological types and clinical stages, whereas fraction of S-phase and PI and the number of AgNORs were significantly higher in patients with PCNA-LI≥25% than that in patients with PCNA-LI<25%. The number of AgNORs/cell correlated well with both pathological types and clinical stages. The combination of PCNA-LI and AgNORs can accurately reflect the proliferative activity of cancer cells in Wilms′ tumor. Conclusion: The current pathological types and clinical stages may reflect the aggressive activity in Wilms′ tumor, but insufficient. The simultaneous determination of PCNA-LI and AgNORs count could be used as the essential complementarity of conventional pathological types and stages for accurate evaluation of biologic behaviour of Wilms′ tumor.

Objective To investigate the effect of intestinal lymphatic duct ligation and ω-3 polyun saturated fatty acids on intestinal and distant organ in intestinal ischemia-reperfusion injury. Methods Totally 40Sprague-Dawley (SD) male rats (SPF grade)after gastrostomy were equally randomized into sham group (Sham), enteral nutrition (EN) group, enteral nutrition and lymphatic duct ligation (EN + L) group, ω-3 polyunsaturated fatty acids (ω-3PUFA) group, and ω-3PUFA and lymphatic duct ligation (ω-3PUFA + L) group. After 7 days of nutritional intervention, rats were subjected to 60 minutes of intestinal ischemia, ischemia plus mesenteric lymph duct ligation, or sham procedures. After 3 days of continuous nutrition intervention using the original nutrient, lymph nodes, lung, intestine, liver, and blood specimens were harvested. Intestinal permeability and morphology, results of bacterial cultures, and serum cytokines were observed or detected. Result After 3 days of intestinal ischemia-reperfusion (I/R), the body weights of rats in EN group significantly decreased when com pared with the pre-I/R levels (P ＜ 0.05), while the body weights of rats in EN + L group were significantly lower than those in ω-PUFA group and ω-PUFA + L group (P ＜ 0. 05). After one day of intestinal ischemia-reperfusion (I/R), the L/M significantly increased in each group (P ＜0.05 or P ＜0. 01). After 3 days of intestinal ischemiareperfusion (I/R) , the L/M were significantly lower than the level one day after ischemia- reperfusion in EN + L group, ω-PUFA group, and ω-PUFA + L group (P ＜ 0.05). The L/M in EN group and EN + L group were significantly higher than that in ω-PUFA + L group (P ＜ 0. 05). The mucosa thickness and villus height of jejunum in ω-PUFA group and ω-PUFA + L group were significantly higher than those in Sham group, EN group, and EN + L group (P ＜ 0. 01 or P ＜ 0. 05). The mucosa thickness and villus height of ileum in ω-PUFA group and ω-PUFA +L group were also significantly higher than those in EN group (P ＜ 0.05). In ω-PUFA + L group, the serum endotoxin level and tumor necrosis factor-α level were significantly lower than those in EN group (P ＜ 0.05), interleukin (IL) -6 level was significantly lower than that in the ω-PUFA group (P ＜ 0.05), and IL-1 β level was significantly lower than those in other groups (P ＜ 0. 05). In EN group, the lung cell apoptosis index was significantly higher than those in other groups (P ＜ 0.05)and the levels of inducible nitric oxide synthase (iNOS)and myeloperoxidase (MPO) were significantly higher than those in ω-PUFA + L group (P ＜ 0. 05). The level of iNOS was also significantly higher in EN + L group than that in ω-PUFA + L group (P ＜ 0.05). Conclusions Sixty minutes of intestinal ischemia can cause intestinal injury, intestinal barrier dysfunction, and increased permeability of intestine. After 72 h of reperfusion, the intestinal injury can be partially recovered and the permeability can be lower than the post-ischemia level; however, bacterial endotoxin translocation and lung apoptotic cells still exist. Intestinal lymphatic ligation can alleviate the lung damage, promote repair of intestinal mucosa, reduce endotoxin translocation, and attenuate the systemic inflammatory response. EN added with ω-3PUFA is remarkably superior to conventional EN.

Objective To investigate the clinical effect of glassfiber post with all-ceramic-crown for incisors restoration, providing some references for our clinical application. Methods 82 patients (100 teeth defect) in our department from October,2008 to October, 2009 were divided into group A and group B with 50 incisors in each. Glassfiber post with all - ceramic - crown was used in group A, and metal post with porcelain-fused-to-metal in group B. After one year follow-up, we observed the clinical effect. Results 49 cases were effective and 1 case failed in group A. 42 cases were effective and 8 cases failed in group B.There was statistically significant difference between the two groups. Conclusions Glassfiber post with all-ceramic-crown is better in convenient handling and good colour for incisors compared to metal post with porcelain-fused-to-metal.

OBJECTIVE: To establish an HPLC method for the determination of phenylhydrazine residues in edaravone.METHODS: The determination was performed on Diamonsil C18 column with 0.05 mol?L-1 ammonium acetate-acetonitrile(80∶20) as mobile phase at a flow of 1.0 mL?min-1.The wavelength of UV detector was set at 233 nm and the sample size was 20 ?L.RESULTS: The linear range of phenylhydrazine was 22～550 ng?mL-1(r=0.999 9);The average recovery was 98.10%(RSD=0.85%),and the detection limit was 44 pg.CONCLUSION: The analytical method is simple,reliable and sensitive,and suitable for the determination of phenylhydrazine residues in edaravone preparation.