3.Comparision of the Efficiency of Different Promoters Driving the Expression of CD19-specife Chimeric Antigen Receptor (CAR)-redirected T Lymphocytes Mediated by Lentiviral Vector
Journal of Medical Research 2017;46(6):92-98
Objective Three kinds of different internal promoters were inserted into the lentiviral vector to drive the expression of CD19-specifc chimeric antigen receptor (CAR)-redirected T lymphocytes with the green fluorescent protein(GFP) and the GFP expression efficiency of transduced cells driven by lentivirus were compared.Methods Three GFP reporter lentivirus vectors carrying different promoters and anti-CD19-CAR,including CMV,EF1α,and CMV-EF1α were selected.Three different vectors' names abbreviate to pHAGE-CMV-EFlα-EGFP-CD19,pHAGE-CMV-EGFP-CD19,pHAGE-EF1α-EGFP-CD19.Human embroic kideny 293T cells were cotransfected with the three plasmids by calcium phosphate DNA precipation.And the expression of GFP was observed under fluorescent microscope after transfecting 293T cells,and virus supernatant was collected after 72 h and centrifuged.Nucleic acid copy number in RNA and the expression of EGFP and CD3 zeta were identified through fluorescence quantitative PCR,flow cytometry and western blotting,respectively.The titers of the lentiviral vectors were determinde by scoring GFP expression following swerial dilutions of the viral supernatant on 293T cells.T lymphocytes was infected with lentivims produced from these reporter vectors.Then,fluorescence microscope,wesyern blotting were used to detect the GFP expression strength.Results Results of fluorescence microscope maintained that different internal promotors driving the expressing effect is different.293T as targeted cell,the transfected 293T cells were found containing strong expression of GFP.The amount of the 293T cells expressing GFP driven by CMV-EF1α promoter was the largest,while the EF1α promoter was the smallest.Flow cytometry results show that the rate of transduction is 72.4%,20.6% and 14.5%,respectively.T lymphocytes as targeted cell,Western blot showed that CMV-EF1α was the largest among all promoters,while the CMV was the smallest.Conclusion In the study of gene expression mediated by lenuvirus,proper cell lines and promoters should be selected to obtain high efficiency.
5.Investigation on Key Aspects of the Bilingual Teaching in Microbiology
Microbiology 1992;0(02):-
Fundamental specialized courses are important due to their connection between fundamental knowledge and major knowledge,which are regarded as the difficult courses for undergraduates to learn.The useful approaches and experience of bilingual teaching in microbiology,one of the fundamental specialized courses for the students majoring in Bioengineering,are presented here.The key aspects such as choosing textbooks,teaching manners and teaching contents are also discussed.This paper also proposes how to improve the quality of bilingual teaching during the fundamental specialized courses.
6.Sensory reeducation for restoring the sensation of palm after the median nerve injuries
Xiufu LAN ; Yueqiu LIN ;
Chinese Journal of Physical Medicine and Rehabilitation 2003;0(06):-
Objective To observe the effects of early rehabilitation training on sensory restoration after the median nerve injuries. Methods Seventy patients with median nerve injuries were randomly divided into two groups: the rehabilitation group ( n =32), in which the patients received sensory reeducation two weeks after surgical treatment; and the control group ( n =38),in which the patients only received surgical treatment. After 6 8 weeks of treatment, reassessment were performed and the results were compared between the two groups. Results The excellent and effective rates of functional recovery in sensation in the rehabilitation group were 88% and 97%, respectively. A comparison showed that there was significant difference between the two groups. Conclusion Sensory reeducation could accelerate the restoration of sensation in patients with median nerve injury.
7. Optimization of urinary sample preparation process for real-time PCR detection of BK virus
Academic Journal of Second Military Medical University 2010;31(4):438-441
Objective: To develop an effective preparation method to improve the sensitivity and accuracy of real-time PCR in detection of BK virus's (BKV's) load in urine samples. Methods: A total of 24 samples documented as positive probes in primary detection were enrolled in this study. The candidate samples were prepared by 4 different approaches: unprocessed urine, BKV's DNA extracted from urine, 1:10 diluted urine, and 1:100 diluted urine; and then they were subjected to real-time PCR examination to obtain the viral load. The data obtained were analyzed by SPSS 11.0. Results: The four different preparation processes for urinary specimens had significant impact on detection results of real-time PCR. Three samples were negative in the unprocessed urine group and 66.7% of its samples had the lowest viral loads compared with the other three groups. Two samples in the 1:100 diluted urine group were negative and 79.2% of its samples had the highest viral loads, but its median load was similar to that of the 1:10 group. Viral gene was detected in all samples in the DNA extraction group and 1:10 diluted urine group, but the loss of the target gene was more severe in the DNA extraction group. Conclusion: The 1:10 diluted urine is better for real-time PCR detection of BKV's load, as it lose less viral gene and is more efficient, easy to perform and economical.
8.Effects of siRNA Silenced ERK1/2 Gene Collaborated withJiakangning Capsules on FRTL-5 Proliferation
Lan LIN ; Qiuhong WANG ; Yongxin YI
Chinese Journal of Information on Traditional Chinese Medicine 2016;23(6):43-46
ObjectiveTo observe and explore the effects ofJiakangning Capsules on the expression of ERK1/2 gene and proliferation of FRTL-5 by studying the effects ofJiakangning Capsules collaborated with siRNA on interfering ERK1/2 gene in FRTL-5.Methods FRTL-5 cells in good conditions were divided into control group, negative control group,Jiakangning Capsules collaborated with siRNA group, siRNA interference group, and Jiakangning Capsules group. RT-PCR was performed to detect the expression of ERK1/2 gene in mRNA levels in FRTL-5; Western blotting was performed to detect the expressions of ERK1/2 and p-ERK1/2; CCK8 method was used to detect cell proliferation.Results RT-PCR results showed that the ERK1/2 mRNA expression of the control group and negative control group were of no significant difference (P>0.05); compared with the control group, siRNA interference group andJiakangning Capsules group could inhibit ERK1/2 gene mRNA expression in FRTL-5 (P<0.01). Compared with the control group and negative control group, the ERK1/2 mRNA expression of Jiakangning Capsules collaborated with siRNA group decreased obviously (P<0.01). Compared with the control group and negative control group, the expression of p-ERK1/2, ERK1/2 ofJiakangning Capsules group, Jiakangning Capsules collaborated with siRNA group, and siRNA interference group decreased obviously (P<0.01). At the time of 24 h and 48 h after transfection, according to the results of CCK8, compared with the control group and negative control group, the cell proliferation ofJiakangning Capsules group, Jiakangning Capsules collaborated with siRNA group, and siRNA interference group was inhibited (P<0.01).Conclusion Jiakangning Capsules have blocking effect on the phosphorylation of ERK1/2. After ERK1/2 gene was silenced, the thyroid cell proliferation was inhibited. Jiakangning Capsules can collaborate with ERK1/2-siRNA to inhibit FRTL-5 cell proliferation.
9.Study on shortening the time of initial oral intake after general anesthesia in patients receiving oral and maxillofacial surgery
Wei LIN ; Minfeng LAN ; Weiping FENG
Chinese Journal of Practical Nursing 2016;32(25):1966-1969
Objective To study the effect of shortening the time of initial oral intake and fluid intake after general anesthesia in patients receiving oral and maxillofacial surgery on promotion of postoperative recovery. Methods A total of 116 patients were divided into the control group and the observation group with 58 cases in each group by random digit table from January 2014 to December 2015. Patients in the control group were allowed to take food orally 6 h after they regain analepsia from anesthesia;while those in the observation group were allowed to drink water after 2 h upon analepsia from anesthesia and take liquid food after 4 h. The mis-aspiration, the fasting glucose, blood pressure, heart rate and the rate of hunger, thirst, nausea, vomiting as well as blood pressure and heart rate were observed. Results The rates of hunger, thirst, nausea, vomiting in the observation group were 17.2%(10/58), 5.2%(3/58), 12.1%(7/58), 1.7%(1/58), which were significantly lower than those in the control group, which were 94.8%(55/58), 91.4%(53/58), 36.2%(21/58), 10.3%(6/58), and there were significant differences(χ2=7.484-54.772, all P<0.05). The fasting plasma glucose level in the observation group [(4.93 ± 0.85)mmol/L] was higher than that in the control group [(4.05 ± 0.51)mmol/L],and there was significant difference(t=-7.152, P<0.05). There were significant differences in blood pressure 3 h and 5 h after operation compared with those of the control group(P<0.05). Conclusions Shortening the time of taking food for patients undergoing oral and maxillofacial surgery can relieve uncomfortable symptoms , prevent hypoglycemia and the hemodynamic disturbance after anesthesia and promote recovery,early postoperative feeding should be suggested on the premise that they are fully awake.
10.Significance of changes in hepatic histology from patients with HBeAg(+)or HBeAg(-)chronic hepatitis B and normal or mildly elevated alanine aminotransferase
Lin LAN ; Yin KONG ; Lingyi ZHANG
Journal of Clinical Hepatology 2015;31(4):510-513
Alanine aminotransferase (ALT)abnormality is an indicator of the degree of liver inflammation caused by immune activation in patients with chronic hepatitis B (CHB).However,approximately half of the CHB patients with normal or mildly elevated ALT levels have concealed significant changes in hepatic histology.CHB patients with normal or mildly elevated ALT levels may have significant histopatho-logical changes in hepatic tissues,and those changes vary between HBeAg(+)and HBeAg(-)CHB patients.Attention and investigation on the clinical management of CHB patients with normal or mildly elevated ALT levels may have great significance in grasping the right treat-ment opportunity and reducing the risk of liver cirrhosis.