Objective: To discuss correlations between the chemical constituents of different endophytic fungi and their host and provide basis of researching the mechanism of some endophytic fungi which have the abilities to produce the same or similar chemical constituents as their host plant product. Methods: Chemical compounds derived from the endophytic fungi and their host Spiramthes sinensis were tested by HPLC, and the correlation data were analysed by SPSS 16.0. Results: The clustering is not obvious between petroleum ether extracts of fungi; the result of study on the ethyl acetate extracts and water-saturated n-butanol extracts showed that fungi isolated from the same organ tended to cluster together and the same species fungi tended to cluster together. Conclusion: Correlation among the petroleum ether extracts of the fungi is not obvious. The correlation between the ethyl acetate extracts are the most obvious in organ from which the fungi isolated and within the species.

Objective To construct markless gene deletion mutant at the clpP loci on the chromosome of Streptococcus mutans(S.mutans).Methods ASp resistance gene was amplified by PCR,to construct the Sp resistance cassette where the Sp resistance gene was flanked with two loxP site.After the clpP gene was cloned into the pGEM-T-Easy TA cloning vector,it was digested and linked with the Sp resistance cassette,yielding homologous recombination vector pIB △ clpP-Sp.The vector was linearized and used for the transformation of S.mutans UA159,with transformants selected on TPY plates containing Sp.The selected strain was transformed with the thermosensitive plasmid pCrePA to excise the Sp resistance gene.The pCre-PA was then easily eliminated at nonpermissive temperature,resulting in a markless mutant strain carrying a deletion at the clpP loci,which was verified by PCR and DNA sequencing.Results The result of the PCR analysis and DNA sequencing indicated that a part of the clpP gene was deleted.There was a loxP at this loci without the Sp resistance gene.Conclusion The markless clpP-deletion mutant of S.mutans was constructed successfully,which laid a foundation for further study of its biological function and its influence on the cariogenicity of S.mutans.

Adult ; Aged ; Aged, 80 and over ; Carcinoma, Squamous Cell ; immunology ; pathology ; Cytokines ; blood ; Esophageal Neoplasms ; immunology ; pathology ; Female ; Humans ; Interferon-gamma ; blood ; Interleukin-10 ; blood ; Interleukin-12 ; blood ; Interleukin-4 ; blood ; Interleukin-5 ; blood ; Lymphatic Metastasis ; Male ; Middle Aged ; Th1 Cells ; immunology ; Th2 Cells ; immunology ; Tumor Necrosis Factor-alpha ; blood

Objective To investigate the relationship between retinal nerve fiber layer thickness and peripheral neuropathy in elderly patients with type 2 diabetes.Methods Clinical data of elderly patients with T2DM in Endocrinology Department in Beijing Hospital were retrospectively collected.Global and sectorial retinal nerve fiber layer(RNFL)thicknesses were measured by using optical coherence tomography(OCT),and never conduction velocity measurements were performed in all patients.Diabetic peripheral neuropathy was diagnosed by the criteria in diabetic neuropathies update(2010,American Diabetes Association).RNFL thickness was compared between diabetic nonperipheral neuropathy group (control group,n =30)and diabetic peripheral neuropathy group (DPN group,n=17)and between different sub-groups.Results The RNFL thicknesses of temporal,nasal,superior and inferior visual fields and the mean RNFL thickness were less in DPN group than in control group,among which there were significant differences in the RNFL thicknesses of superior,inferior visual fields and the mean RNFL thickness [(107.7±27.4)μm vs.(128.1±17.3)μm,(112.9 ±20.8)μm vs.(130.8±21.8)μm,(88.2±15.5)μm vs.(100.5± 11.3)μm,F=7.446,7.468,7.988,respectively,P=0.009,0.009 and 0.007].RNFL thickness was decreased along with the aggravation of DPN from the control group,the subclinical DPN group to the DPN group successively(all P＜ 0.05).Conclusions Retinal nerve fiber layer thickness is associated with diabetic peripheral neuropathy in elderly patients with type 2 diabetes,and the relationship is more significant in patients with serious DPN.

Objective To analyze the emergency medical services of the 2006 Olympic Came opening ceremony,and meanwhile to provide information and data for medical treatment at future international activities.Method About 120 000 people,consisting of athletes,actors,audience and staff,joined the opening ceremony.The emergency medical services were completed according to gathering regions,flowing directions,routes,and peaks,and the results were statistically analyzed.Results Twenty-two medical stations and 61 emergency medical supervising units provided pre-hospital services,and there turned out to be 573 patients during the opening ceremony.All of the patients were provided with emergent medical services on the spot,and some critically ill patients were sent to the local hospital after first aid.There was no death,serious.injuries,or chaos during the Opening Ceremony.Conchusions The foundation of emergency service is to set up a sound emergency response system.To successfully fulfill the minion.it is well-advised to enforce the pre-hospital human resources and emergency equipments,make serial trainings.collocate the medical station and supervising stands according to the the number of patients and its peak.

Objective: To investigate the effects of ω-3 fish oil fat emulsion on nutritional status and humoral immunity in postoperative patients suffering from gastrointestinal malignancy. Methods: Thirty patients of gastrointestinal malignancy were randomly divided into study group (n = 15) and control group (n = 15). All the patients were assigned to receive total parenteral nutrition with the equal nitrogen and calory,and those in study group received fish oil fat emulsion additionally. Liver and renal function, blood lipid, haemoglobin, albumin, transferrin, total lymphocyte count (TLC) , B lymphocyte subsets (B1, B2), immunoglobin(IgG, IgM, IgA) and complement(C3, C4) were determined preoperatively and 1, 6d postoperatively. Results: There were no significant differences in liver and renal function and blood lipid on postoperative day 6 versus preoperation in all the two groups. TLC, IgG, IgM, C3 on postoperative day 6 were siginificantly higher in the study group(P < 0. 05). Haemoglobin, albumin, transferrin and B lymphocyte subsets were not significantly different between the two groups. Conclusion: Fish oil fat emulsion treatment was safe and tolerated, and could improve the humoral immunity in patients.

The abnormal accumulation of extracellular matrix (ECM) in liver is the main feature of hepatic fibrosis,and collagen is the most important component in ECM.Collagen plays an important role in the occurrence and development of liver fibrosis.Therefore,to find traditional Chinese medicine with significant effect on collagen metabolism has become a critical approach for the treatment of hepatic fibrosis.This review summarized the role of collagen metabolism in liver fibrosis,and the research progress in traditional Chinese medicines with anti-hepatic fibrosis effect by regulating collagen metabolism was explored as well.

A strain of Cellulosimicrobium cellulans Ha8 was studied on its morphological, biological characteristics and its utilization of several kinds of benzoic compounds, the results showed this strain was Gram-positive, the long rod-shaped cells were changed into short rod-shape gradually. pH value from pH 6.0 to pH 9.0 and the temperature from 20 ℃ to 40 ℃ were good for its growth. It could not only hydrolyze protein and starch, use cellulose and pectin, decomposite chitin, liquify gelatin and fix nitrogen, but also use phenol, xylene, benzoic, cinnamic acids and diphenlamine as the sole carbon resource for its growth. It could tolerate 0 mmol/L~30 mmol/L, 0 mmol/L~8 mmol/L, 0 mmol/L~30 mmol/L, 0 mmol/L~15 mmol/L and 0 mmol/L ~ 40 mmol/L of benzoic acids, phenol, xylene, cinnamic acids and diphenlamine seperately, but could not use 2,4-dinitrophenol, o-Nitrophenol, 2-Methoxyphenol, aminobenzenesulfonic acid, catechol and o-Phenanthroline as its sole carbon resource.

Objective To investigate the effects of downstream regulatory element antagonist modulator (DREAM) on the expression of glutamate transporter-1 (GLT-1) in spinal cord in rats with bone cancer pain and morphine tolerance.Methods Sixty female healthy Sprague-Dawley (SD) rats weighing 200 ～230 g were randomly divided into tow groups,group Ⅰ cancer pain (CP,n =48) and group Ⅱ Sham (S,n =12).Cancer pain in each group was produced by inoculation of syngenetic Walker 256 rat mammary gland carcinoma cells (5 × 105) to left tibia.Pain threshold to mechanical stimulus was measured before (baseline) and after the surgical procedure.From 14 d to 18 d after the inoculation of carcinoma cells,36 rats from group CP received subcutaneous injection of morphine at 3 times per day with doses increasingly from 10 mg/kg initially to 20 mg/kg,30 mg/kg,40 mg/kg,and 60 mg/kg.Equal volume of normal saline was applied to the 12 rats left in group CP.On 19th day after the carcinoma cells inoculation once subcutaneous injection of morphine at 3mg/kg was performed in all rats in group CP.From the next day,the rats in group CP ever receiving injections of morphine for 5 days were randomized into thre subgroups,including subgroups morphine tolerance (MT,n =12),vehicle (V,n =12),and RNAi (R,n =12).They were injected intrathecally with 20 μl of normal saline (NS),10 μl vehicle plus 10 μ1 NS,and 10 μ1 of DREAM-shRNA plus l0 μ1 NS,respectively,once a day for 5 days.Focusing on the affected limb,mechanical pain threshold was measured one day before surgery (T0),and at day7 (T1),day 14 (T2),day 18 (T3),day 19 (T4),day21 d (T5),day 25 (T6),and day 28 (T7) after surgery.The animals were sacrificed at day 28 after the procedure.The lumbar 4 segments in rats were removed for detection of DREAM and GLT-1.Results The mechanical threshold was significantly decreased at T1 compared to the baseline in all groups,returned to the baseline at T2 ～ T7 in group S,at T4 in group CP,and at T2 in group MT,V,and R,but remained low at T5 ～T7 in group CP,and at T3 ～T7 in group MT,V,and R.Compared to that at T1,it was decreased at T2 ～T3 and T5 ～ T7 in group CP,at T4 ～ T7 in group MT and V,and at T4 ～ T5 in group R,going back to the baseline at T4 in group CP and at T2 in group MT,V and R,and increased at T6 ～ T7 in group R.Compared to that in group S,the mechanical threshold in group CP,MT,V and R was decreased,and lower at T2 in group CP and at T4 in group MT,V and R.Compared to that in group CP,the mechanical threshold was significantly higher at T2 ～ T3 but lower at T4 in group MT,V,and R,decreased at T5 in group R and at T5 ～ T7 in group MT and V.The mechanical threshold was increased at T6 ～ T7 in group R and higher than that in groups MT and V.The expression of DREAM,compared to that in group S,was down-regulated in other groups.Compared to group CP,increment was shown in groups MT and V,and decrease was exhibited in group R.It was cut down in group R compared to that in groups MT and V.Compared to group S,GLT-1 was decreased in other groups.It was down-regulated in groups MT,V and R compared to group CP.Conclusions DREAM is involved in the development of allodynia after morphine tolerance in rats with bone cancer pain.No evidence in this study supports a link between DREAM and GLT-l in spinal cord.

Objective To observe effects of electro-acupuncture (EA) on the expression of apoptosis related protein B-cell lymphoma/leukemia gene 2 (Bcl-2) and Bcl-associated protein X (Bax) in the hippoeampal CA1 region of rats with cerebral infarction,and on their behavior. MethodsAn animal model of cerebral ischemia was established by right side middle cerebral artery occlusion using thread in 48 male,adult Wistar rats,who were then randomly divided equally into an EA group and a control group.Both groups were sub-divided into 1 week,2 weeks and 3 weeks subgroups.The EA group began receiving EA 24h after the occlusion,applied at the Baihui (DU20) and Dazhui (BU14) points,once daily,for one,two or three weeks.The control group was reared conventionally and was not given any special treatment.The rats'learning and memory,motion and neural function were evaluated.The expression of Bcl-2 and Bax in the CA1 region of the hippocampus on the infarcted side and changes of apoptosis indexes were detected using immunohistochemical techniques.ResultsThe learning,memory,motion and neural function of the EA group rats were better on average than those of the control group at all observation time points.The expression of Bcl-2 protein increased along with reduced expression of Bax protein in the EA group significantly more than among the controls.TUNEL positive cells in the CA1 region of the hippocampus were reduced significantly in the EA group compared with the control group.ConclusionsBehavioral ability after cerebral infarction can be improved by EA at the Baihui (DU20) and Dazhui (BU14) points.EA can up-regulate the expression of Bcl-2 and down-regulate the expression of Bax and reduce TUNEL positive cells in the CA1 region of the hippocampus after cerebral infarction,which might be the mechanism of its neuroprotection.