Objective To investigate the influence and the possible mechanism of tea polyphenols on maintenance hemodialysis (MHD)patients’ oxidative stress and micro inflammatory condition.Methods 60 cases of MHD patients were randomly divided into routine group and tea polyphenols group.30 healthy subjects were chosen as normal control group.After 3 months,MDA,AOPP,SOD,TNF-α,CRP,IL-6 and NF-κB of routine group and tea polyphenols group were detected.Results Before treatment,compared with normal control group,MDA and AOPP of routine group and tea polyphenols group increased (P <0.01 ),SOD decreased (P <0.01 );after treatment,compared with routine group,MDA and AOPP of tea polyphenols group decreased (P<0.01),SOD increased (P<0.01).After treatment,compared with normal control group,NF-κB,TNF-α,CRP, IL-6 and oxidative index of routine group and tea polyphenols group increased,and the difference was statistically significant (P<0.01);compared with routine group,oxidative index of tea polyphenols group decreased,and the difference was statistically significant (P <0.01 ).Conclusion Tea polyphenol can improve MHD patients’oxidative stress and micro inflammatory state.

Objective To study the inhibitory effect and mechanism of citrusinol on proliferation of human hepatocellular carcinoma cells HepG2.Methods The inhibitory rate of HepG2 cells cultured in vitro was measured by MTT assay.The morphology and distribution of the ceils were observed by HE and acridine orange staining.The cell division cycle was detected by flow cytometry.The expression of F-actin protein was observed by fluorescent chromogenic method.Results Citrusinol could inhibit the growth of HepG2 cells,and the IC50 of the inhibitory rate was 76.46 μmol/L.Citrusinol could make the HepG2 cells shrink,arrest the cell division cycle to G2/M,and inhibit the expression of F-actin.Conclusion Citrusinol can prevent cell proliferation by arresting cell division cycle in G2/M phase and inhibiting the formation of cytoskeleton,thus inhibiting the growth of G2/M.

Objective:To describe a method based on analysis of the histogram of intensity values pro-duced from the magnetic resonance imaging (MRI)for quantifying the degree of fatty infiltration. Methods:The study included 25 patients with dystrophinopathy.All the subjects underwent muscle MRI test at thigh level.The histogram Mvalues of 250 muscles adjusted for subcutaneous fat,representing the degree of fatty infiltration,were compared with the expert visual reading using the modified Mercuri scale.Results:There was a significant positive correlation between the histogram Mvalues and the scores of visual reading (r =0.854,P <0.001).The distinct pattern of muscle involvement detected in the pa-tients with dystrophinopathy in our study of histogram M values was similar to that of visual reading and results in literature.The histogram M values had stronger correlations with the clinical data than the scores of visual reading as follows:the correlations with age (r =0.730,P <0.001 )and (r =0.753, P <0.001);with strength of knee extensor (r =-0.468,P =0.024)and (r =-0.460,P =0.027) respectively.Meanwhile,the histogram Mvalues analysis had better repeatability than visual reading with the interclass correlation coefficient was 0.998 (95% CI:0.997 -0.998,P <0.001)and 0.958 (95%CI:0.946 -0.967,P <0.001)respectively.Conclusion:Histogram Mvalues analysis of MRI with the advantages of repeatability and objectivity can be used to evaluate the degree of muscle fatty infiltration.

Objective To evaluate the effect of dexmedetomidine on synaptic transmission in the spinal dorsal horn of rats.Methods Male Sprague-Dawley rats,aged 4-6 weeks,weighing 150-200 g,were used in the study.The lumbar enlargemnent segments of the spinal cord were harvested,and the parasagittal lumbosacral spinal cord slices with attached dorsal roots were prepared and incubated in artificial cerebro-spinal fluid.The whole-cell patch-clamp technique was used to record each index,and 4 spinal cord slices were selected and used for each index records.Experiment Ⅰ Dexmedetomidine was added cumulatively in concentration increments.Aδ and C fibers-mediated evoked excitatory postsynaptic currents (eEPSCs) were recorded before administration (baseline) and during perfusion with dexmedetomidine 4 and 10 μg/ml.Experiment Ⅱ The neurons innervated by Aδ and C fibers were selected,and Aδ and C fibers-mediated eEPSCs were recorded before administration (baseline),at 5 min of perfusion with yohimbine (alpha 2 adrenergic receptor antagonist) 2 μmol/L,and during continuous perfusion with yohimbine 2 μmol/L plus dexmedetomidine 4 μg/ml.Experiment Ⅲ The evoked excitatory postsynaptic potentials (eE-PSPs) and evoked inhibitory postsynaptic potentials (eIPSPs) were recorded before administration (baseline) and during perfusion with dexmedetomidine 4 μg/ml.Results Dexmedetomidine could dose-dependently inhibit Aδ and C fibers-mediated eEPSCs,dexmedetomidine could inhibit Aδ and C fibers-mediated eEPSPs and produced no effect on eIPSPs,and yohimbine could inhibit dexmedetomidine-induced inhibitory effect on eEPSCs.Conclusion The mechanism by which dexmedetomidine inhibits nociceptive information transmission in the spinal dorsal horn is related to inhibition of excitatory synaptic transmission through activating α2-adrenergic receptors,but not related to activation of inhibitory synaptic transmission in rats.

Objective To investigate the value of Habib 4X in hepatic resection. Methods The clinical outcome of 21 patients with liver disease who received liver resection at the Tianjin Third Central Hospital from November 2009 to April 2010 were retrospectively evaluated. All the operations were carried out by using Habib 4X. Results All patients received hepatectomy, including right hepatectomy in three patients, left hepatectomy in one patient, multiple segmentectomy in nine patients, single segmentectomy in seven patients and partial liver resection in one patient. All tumors were reseeted completely. The mean operation time was (50±25) minutes and the mean blood loss was(129±117)ml. No patient was transferred to ICU. Three patients were complicated with bile leakage, one with lymphatic leakage and four with pleural effusion, and they were cured by non-surgical treatment. There were no patients with postoperative hemorrhage, incision infection or hepatic failure. No mortality was observed. The mean postoperative hospital stay was(19±14)days. Conclusions Radiofrequency energy was applied along the margins of the tumor to create zones of necrosis before resection with a scalpel, offering hepatobiliary surgeons an additional method for performing liver resections with minimal blood loss, low morbidity and mortality rates. As for malignant tumors, minor or major liver resection assisted by Habib 4X is safe, and it can reduce the chance of positive incisal margin.

Objective The aim of this study was to establish a rat model of irritable bowel syndrome.Methods Thirty healthy adult SD rats ( mele:female=1:1 ) were divided into normal control group, model group, and positive control group ( pinaverium bromide tablets 15.0 mg/kg) for 31 days.Body weight, appetite, defecation, voluntary move-ment of all the rats were determined.The rates of gastric emptying and small intestinal propulsion rate were measured.The serum 5-HT and plasma SP and VIP or 5-HT, SP, VIP in colon homogenates were assessed by radioimmunoassay.Blood biochemical parameters were measured with an automatic biochemical analyzer.The gastric and intestinal morphology was evaluated by histological examination.Results After modeling, the rat weight and food intake were decreased, ad stool quantity was increased.The voluntary movement and gastric emptying rates were decreased, intestinal propulsion rates were increased, and the contents of SP and VIP in blood were decreased, but increased in the colonic homogenate (P＜0.05, P＜0.01).After treatment, the food intake was increased and stool quantity was decreased, the rat body weight was signifi-cantly increased, the amount of voluntary movement and stool returned near to normal, the 5-HT levels in serum or in co-lonic homogenate were significantly decreased, but plasma VIP levels were markedly increased, and the SP and VIP con-tents were significantly decreased in colonic homogenate in the positive control group (P＜0.05, P＜0.01).Hematology indexes had no obvious changes.The gastric and colonic tissue morphology showed no distinct damages caused by the di-verse stimulating factors.Conclusions The stimulation of composite factors can be used to successfully generate the rat model of irritable bowel syndrome, showing similar clinical manifestation of this disease in humans.

Objective To study the relationship between Y chromosome abnormalities and AZF microdeletions in males with reproductive failure.Methods A case-control study was conducted in 2694 reproductive failure men with age ranges from 23 to 49 years old from the Institute of Reproductive Medicine of Jilin Province.Patients were divided into three groups:spermatogenic failure group (n =1332),disadvantage pregnancy outcomes group (n =994) and adverse birth outcomes group.All patients underwent chromosomal karyotype analysis (G-banding).AZF microdeletions were further investigated in patients with Y chromosomal abnormalities by PCR.The Chi-square test was used to compare the frequency of Y chromosome abnormalities in three groups.Results Of the 51 cases of Y chromosome abnormalities (1.89％,51/2694),32 were (2.40％,32/1332) in the spermatogenic failure group,15 were (1.51％,15/994) in disadvantage pregnancy outcomes group and 4 were (1.09％,4/368) in adverse birth outcomes group.There was no significant difference in Y chromosome abnormalities among different groups (x2 =3.895,P ＞0.05).AZF microdeletions were detected in 10 cases (19.61％,10/51) of Y chromosome abnormalities patients with spermatogenic failure.Conclusions The incidence of Y chromosomal abnormalities in three reproductive failure groups is similar.Chromosome karyotype analysis and AZF microdeletions examination could identify the genetics etiology in males with reproductive failure.

Objective To describe different types of chromosomal abnormalities on male infertility.Methods From May 2006 to May 2012,2034 infertile males with genetic counseling underwent chromosome karyotype analysis,semen routine examination and reproductive hormones levels detection.The data from them were analyzed.Results 267 cases of chromosomal abnormalities were detected in 2034 cases (13.13％).258 cases underwent semen routine examination in 267 cases with chromosomal abnormalities,of which 190 cases of azoospermia,58 cases of oligozoospermia,10 cases of semen normal.In 267 cases of chromosomal abnormalities,including 169 cases (63.30％) of number abnormalities,mainly with azoospermia,157 cases of Klinefelter syndrome (KS) (58.80％),7 cases of 47,XYY (2.62％),4 cases of Turner syndrome (1.50％),1 case of marker chromosome (0.37％) ; 49 cases (18.35％) of structural abnormalities mainly with oligozoospermia,including 32 cases of chromosomal translocations (11.99％),17 cases of inversion (6.37％) ; 4 cases of sex reversal (1.50％) with azoospermia; 45 cases of chromosome polymorphism (16.85％) mainly with oligozoospermia.Non-mosaicism KS patients' age,testicular volume,semen volume,and serum reproductive hormones levels were compared between different groups of semen results,and there were no significant difference except age.Conclusions Chromosome abnormalities were the most important genetic causes of abnormal semen quality and male infertility.It is necessary to be performed chromosome karyotype analysis for infertile males.

OBJECTIVETo explore the effect of Danggui Yinzi (DY) on delayed allergy in model mice with qi-blood deficiency syndrome (QBDS).

METHODSQBDS model was established in 48 Kuming mice of SPF grade by using reserpine and acetophenone hydrazine. Forty of them were then randomly divided into the model group, the loratadine group, the high dose DY group, the middle dose DY group, and the low dose DY group, 8 in each group. Another 8 in line with the same standard were recruited as a blank group. Mice in high, middle, and low dose DY groups were administered with DY concentrated solution at 60, 30, 15 g/kg by gastrogavage. Mice in the loratadine group were administered with loratadine solution at 1.66 mg/kg by gastrogavage. Equal volume of normal saline was administered to mice in the model group and the blank group by gastrogavage. All medication was given once per day for 1 successive week. Except those in the blank group, the rest mice were evenly smeared with 1% DNCB solution on the abdomen. Five days after skin allergy, 1% DNCB solution was smeared to right ear of all mice to stimulate allergic reaction. Mice in the blank group were smeared in the same way without allergenic reaction. The auricle swelling and the inhibition ratio were determined at 24 h after attack. Blood was collected from orbit and serum IgE level detected using double-antibody sandwich ELISA.

RESULTSCompared with the blank group, auricle swelling obviously increased and serum IgE level was obviously elevated in the model group (P < 0.01). Compared with the model group, auricle swelling obviously decreased and serum IgE level was obviously reduced in the 3 dose DY groups (P < 0.05, P < 0.01). Meanwhile, the auricle swelling degree was superior in high and middle dose DY groups to that in the loratadine group (P < 0.05). The inhibition ratio of auricle swelling was sequenced from high to low as 67.3% in the high dose DY group, 56.0% in the middle dose DY group, 48.1% in the low dose DY group, 47.3% in the loratadine group.

CONCLUSIONSDY could inhibit auricle swelling and lower serum IgE level. It also could inhibit delayed allergic reaction in model mice with QBDS to some extent.

Animals ; Disease Models, Animal ; Drugs, Chinese Herbal ; pharmacology ; Edema ; drug therapy ; Hypersensitivity, Delayed ; drug therapy ; Immunoglobulin E ; blood ; Loratadine ; pharmacology ; Mice ; Qi ; Random Allocation

OBJECTIVETo study the effect of extracellular DNA(eDNA) on the formation of Streptococcus mutans(Sm) biofilms during different growth periods in sucrose environment.

METHODSSm biofilms were established on smooth glass surfaces under the environment of 1% sucrose and cultured in the condition of 37 ℃, 5% O2, 85% N2 and 10% CO2. Samples were randomly divided into four groups based on fourculture time(6,12, 24 and 48 h), respectively. Each group was further divided into two subgroups: control group(without deoxyribonuclease Ⅰ[DNaseⅠ] treatment) and test group(with DNaseⅠtreatment). DNaseⅠ was added 1 h advance in the treatment group to a final concentration of 100 U/ml. Each sample was stained with mixed SYTO-9/PI fluorescent dye. Confocal laser scanning microscopy was used for biofilm observation and scanning. The total biomass, the thickness and the volume of red fluorescence of each biofilm sample were measured following three-dimensional reconstruction using the softwear of Imaris 7.2.3.

RESULTSUnder the environment of 1% sucrose, the Sm bacterial adhesion and distribution density increased over time, the quantity of eDNA and membrane-damaged bacteria which were indicated by red fluorescence also increased within 24 h but dropped later. The biofilm biomasses of Sm biofilm in 6, 12, 24 and 48 h DNaseⅠ treatment group reduced significantly(P<0.05) compared to those in the corresponding control groups by 81.3%, 85.0%, 90.1% and 12.4%, respectively. The biofilm thicknesses in each DNase Ⅰ treatment group (except 6 h group) also reduced significantly(P<0.05) compared to those in the corresponding control group by 34.4%, 45.6% and 23.6%, respectively. The quantities of eDNA and membrane-damaged bacteria reduced in each treatment group except 48 h group compared to that in the corresponding control group.

CONCLUSIONSUnder the environment of 1% sucrose, eDNA plays an important role in promoting the formation of Sm biofilm.

Bacterial Adhesion ; drug effects ; Biofilms ; growth & development ; DNA ; physiology ; Deoxyribonuclease I ; pharmacology ; Microscopy, Confocal ; Streptococcus mutans ; physiology ; Sucrose ; Sweetening Agents ; Temperature