Objective To evaluate the timing of postoperative parenteral nutrition support for gastrointestinal tumor patients with a definite nutritional risk.Methods Using a randomized control clinical research methods,80 gastrointestinal cancer patients were randomly divided into study group (40 cases) and control group (40 cases).In the study group parenteral nutrition support started on postoperative day 2,while in the control group it started on postoperative day 1.Flatus passing,the rate of infectious complications,the rate of systemic inflammatory response syndrome,postoperative nutrition support related expenses,and the duration of postoperative hospital stay were recorded.Results There was no significant differences between the two groups (P ＞ 0.05) in age,sex,body mass index,use of glutamine,disease and type of surgery.Compared with the control group,patients in the study group had earlier postoperative flatus passing [(3.33± 1.10) d vs.(4.03 ± 1.51) d,P =0.020],less systemic inflammation response syndrome (8/40 vs.17/40,P =0.030),shorter postoperative hospital stay [(3.33±1.10) d vs.(4.03±1.51) d,P=0.020] and lower nutrition support costs [(2144.49 ±1210.96) RMB vs.(2915.99 ± 1615.68) RMB,P =0.018].There was no significant difference in postoperative nutrition index,peristalsis recovery time and infectious complications between the two groups (all P ＞ 0.05).Conclusions In patients undergoing surgery for GI tumors,parenteral nutrition support started on post-op day 2 promotes the recovery of gastrointestinal function,while decreasing medical cost.

The IgG binding domain of Streptococcal Protein G which can selectively immobilizes the Fc regions of immunoglobulin G(IgG) is a kind of good material for oriented immobilization of antibodies in antibody microarrays.Here,genetically engineered three glutathione S-transferase(GST) fused proteins,bearing one,two and three B-Domains respectively(GST-GBx).The IgG-bindding ability of GST-GBx was investigated by ELISA.The data revealed that when the B-domain's quantity of GST-GBx is identical,the GST-GB3 is the most efficient protein among three GST-GBx protein both the capacity and sensibility of binding IgG.The GST-GB2 is the next one and GST-GB1 is the least one.Thus,the GST-GB3 has significantly predominance in comparison to GST-GB2 and GST-GB1.

Objective:Expression of protein TSLP and selection of full human anti-TSLP single chain Fv ( scFv).Methods:The cDNA of TSLP was amplified.The amplified target gene and the expression vector pET 101/D-TOPO were ligated , and then transformed into E.coli BL21.The protein was induced to expression by IPTG and purified and identified.The biotinylated TSLP protein was used as antigen to select of human TSLP scFv from a constructed human scFv library by phage display .Results: The size of amplified cDNA of TSLP was about 423 bp,and that of expressed protein was about 26 kD.Dot blot and Western blot results showed that the expressed protein was correct.The constructed human scFv library was enriched for three rounds using biotinylated TSLP as antigen by phage display.ELISA results showed that 35% scFvs had binding activity with TSLP.The scFvs with good binding activity were selected and identified by Western blot and sequencing.Conclusion: The full human scFvs against for TSLP were selected suc-cessfully.

Objective:To develop non-immunized human phage display library.Methods:The total RNA of lymphocyte cells from peripheral blood of healthy voluntee was isolated and cDNA was synthesized,and the genes of heavy variable chain (VH) and light variable chain (V? and V?) were amplified by direct PCR and half-nested PCR.By overlapping extension PCR,the genes of VH and VL (V? and V?) were linked.The linked genes of single chain Fv fragment (scFv) were ligated with the vector pCANTAB-5E and then cloned into TG1 for the scFv library construction.Results:By direct PCR and half-nested PCR,42 VH fragments,16 V? and 18 V? fragments were obtained.The size of linked scFv library genes was 750 bp and the volume of constructed scFv library was 1.35?108.The results of BstN Ⅰ analysis of scFv genes from the phage library showed that fingerprint map of the selected scFvs was different.Conclusion:The developed phage library is diversity and can be used for selecting humanized scFv.

Aged ; Aged, 80 and over ; Combined Modality Therapy ; Female ; Humans ; Male ; Middle Aged ; Otorhinolaryngologic Diseases ; therapy ; Retrospective Studies

OBJECTIVETo investigate the changes between pressure of trochlea of talus surface and distribution of area after anterior lower tibiofibular ligament rupture, and provide basis for treating anterior lower tibiofibular ligament rupture.

METHODSSix fresh adult ankle joint specimens (4 males and 2 females, ranging age from 25 to 60 years, with an average of 44.6 years) were adopted. The specimens were removed from skin and muscles, remained ankle joint capsule, medial and lateral ligaments and anteroinferior tibiofibular ligament. The ankle joint was fixed with a special fixture in neutral position. Pressure sensitive film (700 N axial load ) was respectively used to measure mean pressure, peak pressure and stress distribution area of the upper articular facet of talar trochlea of the normal ankle joint and the ankle joint with anterioinferior tibiofibular ligament rupture.

RESULTSThe stress distribution areas of the control group and the ruptured group were respectively (367.8 +/- 54.0) mm2 and (386.0 +/- 53.7) mm2; the mean pressures were respectively (1.40 +/- 0.12) MPa and (1.70 +/- 0.35) MPa; the peak pressures were respectively (2.60 +/- 0.33) MPa and (3.20 +/- 0.32) MPa. The experimental results showed that the change in stress distribution area after anterioinferior tibiofibular ligament rupture was not significant (t = 0.021, P = -0.983). When stress distribution changed, the region of stress concentration transferred to poster lateral,and mean pressure (t = 4.140, P = 0.020) and peak pressure (t = 3.169, P = 0.010) increased significantly.

CONCLUSIONWhen anterior lower tibiofibular ligament rupture occurs, mean pressure,peak pressure and stress distribution of pressure of trochlea of talus surface is changed, which may cause traumatic arthritis, and surgical treatment is considerably used to restore normal anatomy.

Adult ; Ankle Injuries ; Biomechanical Phenomena ; Female ; Fibula ; Humans ; Lateral Ligament, Ankle ; injuries ; Male ; Mechanical Phenomena ; Middle Aged ; Rupture ; Stress, Mechanical ; Tibia

Xylitol, a five-carbon sugar alcohol, has many interesting applications in the food, pharmaceutical, and odontological industries, owing to its high sweetening power, its anticariogenic properties, and its insulin-independent metabolism. The bioconversion of detoxified hemicellulosic hydrolysate to xylitol by microorganisms could be a cheaper alternative to the current chemical process, since it is a simple process, with great specificity and low energy requirements. However, the success of fermentations for xylitol production depends on the productivity of the strain and its tolerance to different toxic or inhibitory compounds existing in the hydrolysates. In addition, a number of culture process parameters proved to have significant effects on xylitol production in hemicellulosic hydrolysate media. One of the most important control variables in this bioconversion is the aeration level, which affects the biochemical pathways in the xylose metabolism. The production of biomass is favored by aerobic conditions, while under anaerobic conditions xylose cannot be assimilated by yeast, whereas xylitol is formed in oxygen-limited incubation conditions. An adapted Candida sp. with enhanced resistance to the inhibitors in the hydrolysate can directly ferment the simply detoxified corn cob hemicellulosic hydrolysate to xylitol. In the present study, the combined effects of shaking speed, C/ N ratio, initial pH, and inoculum level on the fermentation of corn cob hemicellulosic hydrolysate to xylitol by an adapted Candida sp. were investigated using an orthogonal experimental design in flask. As a result, the optimum fermentation conditions were as follows: 180 r/min, a C/N ratio of 50, initial pH 5.5, and an inoculum level of 5% (volume ratio). Moreover, the optimum concentration factor of hydrolysate varied between 3.0 and 3.72 was obtained. Based on these results, in order to evaluate the effect of aeration rate on the fermentation of corn cob hemicellulosic hydrolysate to xylitol in fermentor, batch fermentations were carried out in a 3.7 L stirred fermentor using four different aeration strategies, including three kind of two-stage aeration strategies, which provided relatively high aeration rate in the early stage but reduced it in the later stage, and including a one-stage aeration strategy provided a constant aeration rate. With respect to xylitol yield, the results indicated that two-stage aeration strategy was significantly superior to one-stage aeration strategy. The highest xylitol yield (0.75 g/g) was obtained with oxygen supply strategy C (3.75 L/min for first 24 h, then lowered it to 1.25 L/min, 2.5 L fermentation medium was employed). In this process, without extensive detoxification of hydrolysate, an adapted Candida sp. can efficiently ferment the simply treated corn cob hemicellulosic hydrolysate to xylitol under the optimized fermentation conditions. This work should help the development of an efficient process for producing xylitol from corn cob hemicellulosic hydrolysate on a larger scale by bioconversion.
Aerobiosis ; Candida tropicalis ; metabolism ; Fermentation ; Hydrolysis ; Polysaccharides ; metabolism ; Xylitol ; biosynthesis ; Zea mays ; metabolism

Objective To investigate the changes of sympathovagal balance and the effects of va- gus stimulation on sympathovagal balance in endotoxemia rats.Methods Twenty-four Spragne Dawley rats were randomly divided into four groups.The frequency domain of heart rate variability(HRV)com- ponent was analyzed at 0 min,2 ,4 and 6 hours after intravenous injection of lipopolysaccharide(LPS, 5mg/kg)or physiologic saline,and cervical vagal nerve was stimulated(5mv,2ms,1Hz,5 min lasted, 20 min interval)when LPS or physiologic saline was injected.The levels of Noepinephine(NE)and Ace- tylcholin(ACh)were measured in liver tissues.Results Normalized low frequency(LFnm),hormali- zed high frequency(HFnm),very low frequency(VLF),LF/HF values and liver ACh were significantly increased(P＜0.05)and the level of liver NE was significantly decreased (P＜0.05)after LPS admin- istration.Vagal nerve stimulation markedly increased HFnm but decreased LFnm,VLF,LF/HF values, and the liver ACh also significant increased(P＜0.05 ).Conclusion The results suggest that the ac- tivity of sympathetic and vagal nerve was increased during endotoxemia,but the sympathetic activity was more excitable than that of vagal nerve.Vagal nerve stimulation increased the tone of vagus nerve while the tone of sympathetic nerve was decreased in this study.This may be beneficial for anti-inflammatory activity of vagal nerve.

OBJECTIVE To study the influenceof clonidine on the hemadynamics and plasma catecholamine of the postoperative patients in PACU. METHODS Twenty eight patients suffered from severe OSAHS who underwent modified UPPP and monitored in the PACU after operation were divided randomly into two groups:clonidine group and control group. Both group received the same protocol of sedation and analgesia. Patients in clonidine group received clonidine 3ug/kg injected slowly when entered the PACU,and patients in control group received same volume of NS. Esmolol and Nitroglycerin were used to adjust the hemadynamics. The changing of hemadynamics was recorded,blood samples were taken before operation,2 hours after entering PACU,before discharge from PACU to determine the changing of plasma catecholamine. RESULTS The hemadynamics was more stable in clonidine group than that in control group and less vasoactive agents were needed. The plasma catecholamine was much lower in clonidine group 2 hours after entering PACU and before discharge from PACU than that in control group. CONCLUSION Clonidine could be administered to stabilize the hemadinamics,to lower the level of stress hormone and could improve the recovery of the patients.

Objective To evaluate the expression of Toll-like receptor(TLR)on the monocyte- derived dendritic cells(DC)from chronic hepatitis B(CHB)patients and to analyze the expression pro- file and significance of the TLR such as TLR3,TLR4,TLR?,TLR8 and TLRg,which are associat- ed with immune response to viral infection.Methods Peripheral blood mononuclear cell(PBMC) centrifugated by the hydroxyethyl starch(HES)centrifugation were cultured and induced into DC by granulocyte-maerophage colony stimulating factor(GM-CSF)and interleukin-4(IL-4),and their mor- phology and phenotype were detected by the inverted microscope and flow cytometry respectively. Monocyte-derived DC were obtained from 10 chronically hepatitis B virus(HBV)-infected patients and 15 healthy volunteers.TLR3,TLR4,TLR7,TLRS,TLR9 expression on immature and mature DC were analyzed by FACS Calibur.DC was pulsed with HBcAg on day 3 and 5,then DC maturation and ability to process HBcAg and to stimulate autogeneic T cells were evaluated.Results Monocyte- derived DC developed different TLR expression patterns as they went through different maturation stages.TLR7,TLR8 expressions on immature DC and TLR3,TLR7 expressions on mature DC were lower in CHB than in control(for TLR7,TLR8 expression on immature DC:75.9%,1.0%vs 98.4%,15.4%,P