3.Research and Progress on Feed Phytase Reform by Protein Engineering
Hui CHEN ; Hong-Ning WANG ; Qi WU ; Hai-Xia ZHAO ;
Microbiology 1992;0(03):-
As a kind of additive in feed of monogastric animals, the application of natural phytase is limited due to its disadvantages. In this paper, the strategies of phytse reform was introduced. Furthermore, the research and progress on protein engineering of feed phytase was reviewed, including phytase over-expression, phytase thermostability, catalytic efficiency and optimum pH.
4.Intervention Study on Compound Prescription of Jie Yu No.1 Affecting the Function of SS Adjusting HPA Axis.
Li WU ; Liping ZHANG ; Meng XIA ; Ning XIAO ;
Journal of Medical Research 2006;0(03):-
Objective To investigate the affecting mechanism of Jie Yu No.1 Decoction(JY),which was a complex prescription with the function of adjusting spleen and stomach,on the HPA-axis function of depression model rats.Methods60 SD rats were randomly divided into the normal,the model,the Amitriptyline and the JY decoction groups,with 15 each.Isolated-living condition and chronic mild unpredictable stress were applied suceessively to set up DEP rat model.Radiative immunotherapy was used to measure the content of hormone(CRH),somatostatin(SS) and Cortisol(CORT) in the blood plasma.The correlativity was Analyzed between SS,CRH and CORT to preliminary discuss the affecting mechanism of JY on the function of SS adjusting HPA-axis,and to clarify the antidepressant mechanism of the JY.ResultsThe correlation coefficient between SS and CRH was r=-0.5094,P=0.1972,t=1.4501.The result indicated that SS and CRH had the remarkable negatively correlation.The correlation coefficient between SS and CORT was r=0.010,P=0.9613,t=0.0244.The result indicated that SS and CORT had no remarkable correlation.ConclusionThe antidepressant mechanism of JY may be as that SS reduces CRH contents and reaches the adjustment of HPA-axis function in order to play its antidepressant effect.
5.Orthotopic liver transplantation in the treatment of hepatic cancer:a report of 70 cases
Renpin XIA ; Shichun LU ; Jushan WU ; Ning LI
Chinese Journal of General Surgery 2001;0(07):-
Objective To summarize the clinical experience of liver transplantation in the treatment of hepatocellular carcinoma(HCC).Methods From June 2004 to March 2007,70 consecutive HCC patients underwent liver transplantation in our hospital,including classic orthotopic liver transplantation in 41 cases,and piggyback liver transplantation in 29 cases.All data of patients were retrospectively analyzed.Results All liver transplantation were successfully conducted.The average warm ischemia duration was 4.5 minutes,and cold ischemia duration was 8 hours.There were 3 cases of postoperative deaths.Surgical complications were intra-abdominal hemorrhage in 2 cases,and biliary anastomotic stricture in 4 cases.Sixty-seven cases were followed up for 12-33(average 21) months,10 cases had recurrence of liver cancer after transplatation and 1 dead.Conclusions Liver transplatation can used on selected patients with HCC.Successful liver transplantation relies on good quality of liver graft,and idealized technique of vascular and bile duct reconstruction are key factors of liver transplantation.Proper postoperative management can effectively reduce the complications of operation.
6.Interference of OX40 gene expression induced by small interfering RNA
Renpin XIA ; Shichun LU ; Jushan WU ; Ning LI ; Jing ZHENG
Chinese Journal of Immunology 1986;0(04):-
Objective:To investigate the specific interference of OX40 gene expression induced by RNAi technique in 293T cell lines transfected with rat OX40 gene.Methods:293T cells were transfected with recombined plasmid pEGFP-N1-GFP/OX40,and the positive cell clones were selected by fluorescence protein observation and RT-PCR.One specific dicer siRNA targeted to OX40 mRNA was designed and synthesized,which shared no homology with exons of known human gene.Quantitative real-time PCR was performed to measure the inhibitory rate of target gene expression by comparing OX40 mRNA concentrations before and after siRNA transfection.Results:10 nmol/L siRNA-OX40 elicited the highest level of gene silence in 293T cells which was transfected with siRNA after 48 h (68.3?8.7)%);The time of maximal inhibitory effect was at 48-72 h [(61.7?8.4)%,(39.6?5.6)%].Conclusion:The exogenous OX40 expression can be significantly inhibited by treatment with specific siRNA in a dose and time -dependent manner in 293T cells,which may provide a useful profile for further investigation of inhibition of OX40 protein,and a promising control approach for preventing immune reaction.
7.The current status and outlook of stem cell transplantation
Ning WU ; Hualian HANG ; Jianmin BIAN ; Qiang XIA
Chinese Journal of Hepatobiliary Surgery 2013;19(12):951-955
Stem cells refer to undifferentiated or inad equately differentiated cells that have the ability to become a variety of tissues,regenerate organs,and self expand.There is strong evidence that stem cells have abilities of self renewal differentiation,immune regulation,and a potential for targeted therapy,which all together support development of stem cell transplantation.Stem cell transplantation thera py has become a hot topic in recent years,and the basic theory and clinical application have made great progress.The a bilities of stem cells make their transplantation ideal to pro mote liver regeneration,inhibit liver fibrosis,and provide treatment for many diseases.This article will review the cur rent status and outlook of stem cell transplantation.
9.Analysis on Introducing of Complementary Food and Its Influencing Factors in Shijingshan District in Beijing
shu-yun, GAO ; yi-ping, WU ; ning, FENG ; xia, REN ; hong, WANG
Journal of Applied Clinical Pediatrics 2004;0(12):-
Objective To explore the problems in the introducing of complementary food in infants and provide a guidance for cli nical practice.Methods The questionnaire survey was carried out by childhood health doctors in mothers or caregivers on fixed outpatient health care day. The data of survey was entered into computer and analyzed with SPSS 11.5 software.Results 1.Earlier (
10.Localization of tibial attachment of the posterior cruciate ligament and its gender differences: an MRI analysis
Laiwei GUO ; Ning DING ; Yuanjun TENG ; Xiaoyun SHENG ; Tianen XU ; Huiqiang MENG ; Meng WU ; Yayi XIA
Chinese Journal of Orthopaedic Trauma 2017;19(5):387-392
Objective To localize the tibial attachment of the posterior cruciate ligament (PCL) on the magnetic resonance imaging (MRI) and provide parameters for clinical PCL reconstruction.Methods We retrospectively analyzed 524 patients with intact tibial PCL attachment who had undergone knee MRI from January 2010 to January 2016.They were 286 men and 238 women with an average age of 35 years (from 20 to 50 years).The size and positions of the tibial PCL attachment were measured on the sagittal and coronal MRI slices.The differences were analyzed between different genders.Results On the sagittal slices,the mean distance from the central tibial PCL attachment to the posterior edge of the tibial plateau was 17.9 ± 3.0 mm and the mean anteroposterior diameter of the tibial PCL attachment was 9.7 ± 2.4 mm,with those for males significantly larger than for females (P < 0.05).The above mean values when expressed as a percentage of the posterior tibial slop were 79.9% ±4.5% and 43.7% ± 9.6%,respectively,showing no significant differences between males and females (P > 0.05).On the coronal slices,the distances from the central tibial PCL attachment to the medial and lateral edges of the tibial plateau were 33.5 ± 3.1 mm and 37.4 ±4.1 mm,respectively,and the mediolateral diameter of the tibial PCL attachment was 12.0 ± 1.6 mm,with those for males significantly larger than for females (P < 0.05).The above mean values when expressed as a percentage of the mediolateral diameter of the tibial PCL attachment were 47.4% ± 3.2%,52.7% ±3.1% and 16.9% ± 1.7%,respectively,showing no significant differences between males and females (P > 0.05).Conclusions On knee MRI images,the distance from the central tibial PCL attachment to the posterior edge of the tibial plateau is about 17.9 mm,the anteroposterior diameter of the tibial PCL attachment around 9.7 mm,and the mediolateral diameter of the tibial PCL attachment roughly 12.0 mm.These measurements for males are larger than for females.