1.Role of immune cell interactions in alcohol-associated liver diseases
Wang XIANDA ; Wang JUAN ; Peng HAODONG ; Zuo LI ; Wang HUA
Liver Research 2024;8(2):72-82
Research on inflammatory response,liver injury,and immune regulation has demonstrated that the intricate interactions among immune cells constitute a critical regulatory network.Alcohol consumption alters the liver microenvironment,triggering inflammation and immune responses.Elucidating the inhibitory,cooperative,and synergistic effects among lymphocytes and myeloid cells may reveal the core mechanisms of alcohol-associated liver disease(ALD)pathogenesis and identify promising therapeutic targets.This review seeks to elucidate the intricate and multifaceted interactions among immune cells,encompassing both direct cellular interactions and the secretion of various effector molecules.It is essential to underscore that these interactions have broader and more complex roles in ALD than the activities of individual immune cell types.These interactions play a crucial role in mutually regulating one another,thereby preserving the homeostasis of the inflammatory and immune response in the liver environment.Targeting these immune cell interactions is anticipated to offer a novel approach to the prevention and treatment of ALD.
2.The complications of oblique lateral interbody fusion procedure
Xianda GAO ; Jiayuan SUN ; Zhaohun LI ; Dalong YANG ; Lei MA ; Wenyuan DING
Chinese Journal of Orthopaedics 2020;40(8):546-552
Oblique lateral interbody fusion (OLIF) was minimally invasiveprocedure for lumbar interbody fusion (LIF) through the space between anterior margin of retroperitoneal psoas major muscle and the vessels (ATP). Although OLIF had many advantages over other approaches, there were also various kinds of surgical complications, the incidence of which was 3.69%-81.82%. Most of the complications were relieved by conservative or symptomatic treatment. Only a small number of complications were difficult to recover, if so, revision surgery was needed and might remain persistent symptoms. OLIF complications included intraoperative and postoperative complications. Major vascular injury was a dangerous complication during operation, which requires immediate compression or suture to prevent bleeding. The incidence of nerve injury could be reduced by avoiding violent traction and tissue separation and reducing the operation time. When injury of thorax and peritoneum occurs, suture should be done as soon as possible. Transient hip flexion weakness and transient thigh/groin sensory disturbance was the most common post-operative complication, most of which would disappear after several months. Intestinal obstruction is caused by the pulling of peritoneum during operation, most of which was incomplete and would be relieved after some time. Postoperative infection was mostly superficial and would be cured by dressing change and antibiotic application. Subsidence of cage and collapse of intervertebral space were the most common complications related to instrumentations which might not lead to related clinical symptoms; however the severe cases need to be repaired. The incidence of pseudarthrosis is relatively low and a few patients with clinical symptoms need revision surgery. The sample size of most studies was small and follow-up period was short. In the future, large samples and multi-center studies are needed to improve our understanding of OLIF complications in the future.
3. Genetic analysis of norovirus in infants and children in Jilin Province from 2014 to 2016
Xiang LI ; Xianda YANG ; Yao YANG ; Liwei SUN ; Shang XU ; Donglin WU
Chinese Journal of Experimental and Clinical Virology 2019;33(3):297-302
Objective:
To analyze the genetic characteristics of norovirus(NoV) in Jilin province from 2014 to 2016.
Methods:
Stool samples from children under 5 years of age with diarrhea were collected from Changchun Children′s Hospital. Samples were amplified by RT-PCR. The polymerase and capsid gene of the positive specimens were amplified.Sequences were analyzed by homologous comparison and phylogenetic analysis.
Results:
A total of 1 335 samples were detected, 177 were positive for NoV, and positive rate was 13.26%. The positive rate was 11.83% in 2014, 12.53% in 2015 and 15.75% in 2016. Genotyping of polymerase region revealed GII.P12 types dominated in 2014 and GII.Pe types dominated in 2015 and 2016. Genotyping of polymerase region revealed that GII.3 types dominated in 2014 and GII.4_Sydney2012 types dominated in 2015 and 2016. The types of both regions included GII.P17/GII.17, GII.Pe/GII.4_Sydney2012, GII.P12/GII.3, GII.Pe/GII.3、GII.P16/GII.2 and GII.P7/GII.6.
Conclusions
Genotypes of NoV infection are diverse in Jilin province. Most of them are recombinant strains. The main epidemic strains changed from GII.P12/GII.3 in 2014 to GII.Pe/GII.4_Sydney2012 in 2015 and 2016.
4.The design and assessment of a novel simulated training system for cardiac surgery.
Shichao LIANG ; Chengli SONG ; Xuesong ZHAO ; Chang MA ; Xianda LI ; Sha LIU
Journal of Biomedical Engineering 2018;35(5):779-785
Simulations can mimic the environment that refers to the surgery operation to improve the technical skills of the trainees. In this paper, we designed a new cardiac surgery simulative training system. The isolated pig heart was selected as the heart model. A mechanical device was designed to achieve the beating of heart model. At the same time, adjusting frequencies of mechanical movement could change the rating of heartbeat. In order to validate the rationality of the system, 12 non-medical specialty students and 12 medical specialty students were divided into two groups, which consecutively accepted seven-days of training for off-pump coronary artery bypass grafting using the cardiac surgery simulative training system. The time for completing bypass grafting before and after training were recorded. And the bridging outcomes of each trainee were assessed by 3 surgery cardiac surgeons using the object structured assessments of technical skill (OSATS) criteria. After training, each trainee could finish the bypass suturing in a shorter time than before training, and the scores of each trainee assessed by OSATS criteria were also improved. The results showed that the cardiac surgery simulative training system had better training effect in improving the surgical techniques, operation skills and proficiency of surgical instruments of trainees.
5.Novel mutations of XPC gene detected in a family affected with xeroderma pigmentosum group C.
Lijuan WANG ; Sexin HUANG ; Jie LI ; Yang ZOU ; Peiwen XU ; Ming GAO ; Ranran KANG ; Hongqiang XIE ; Xianda WEI ; Yuping NIU ; Xiaowei LIU ; Yuan GAO
Chinese Journal of Medical Genetics 2018;35(4):540-543
OBJECTIVETo detect mutations of the XPC (XPC complex subunit, DNA damage recognition and repair factor) gene in a family affected with xeroderma pigmentosum group C (XP-C).
METHODSThe patient was subjected to next-generation sequencing and Sanger sequencing. Suspected mutations were validated by Sanger sequencing. Effect of splicing mutation was confirmed by reverse transcription-PCR (RT-PCR).
RESULTSCompound heterozygous mutations of c.2098G to T and c.2034-7_2040del were found in the XPC gene in the proband. Among these, c.2098G to T (p.G700X) is a nonsense mutation resulting in a truncated XPC protein. C.2034-7_2040del involves the -1 position, which may alter the splice donor site of the intron 11 of XPC and result in a truncated XPC protein with loss of amino acids from 940 to 679 positions. The two mutations were not detected among 100 unrelated healthy controls.
CONCLUSIONMutations of c.2098 G to T and c.2034-7_2040del of the XPC gene may lead to abnormal XPC expression and reduction or elimination of normal XPC functions, which may underlie the disease in this family.
6.Binary cardiac rehabilitation in patients with acute myocardial infarction and the measurement of 6-minute Walk Test
Xiaoru CHE ; Linyan QIAN ; Jie PANG ; Juebao LI ; Hui WANG ; Yunlan DAI ; Zhanhong QIAN ; Yaju QIU ; Jing WANG ; Xuelie HU ; Xianda CHE
Chinese Journal of Emergency Medicine 2018;27(6):657-662
Objective To study the effects of binary cardiac rehabilitation (CR) composed of hospital-based and home-based CR in patients after acute myocardial infarction (AMI) evaluated by six-minute walking distance (6MWD). Methods A total of 38 post-MI patients were divided into two groups, namely conventional CR group (n=20) and binary CR group (n=18). In the first seven days, CR training was carried out in all 38 patients in our hospital, and then 20 patients were kept at CR training in the hospital (hospital-based CR group), whereas the remaining 18 patients (binary CR group) got tele-monitored walking training at home for eight weeks (binary model). Before discharge from hospital based CR or after 8 weeks CR at home, all patients received Cardiopulmonary Exercise Testing and Six-minute Walk Test, and the data of patients' body mass index (BMI),thyroid function, serum lipid metabolism and echocardiography were collected before and after CR. Results After CR, BMI and low density lipoprotein (LDL) decrease in both groups compared with those before CR[hospital-based group: BMI, (25.99±3.36)kg/m2 vs. (23.04±3.72) kg/m2,P<0.05; LDL, (3.40±1.38) mg/dl vs. (2.04±0.73)mg/ dl,P<0.01; binary group: BMI, (24.84±2.70) kg/m2 vs. (22.88±2.56) kg/m2,P<0.05; LDL, (3.40±1.01) mg/dl vs. (92.11±0.37) mg/dl,P<0.01]. After 8 weeks CR at home or hospital based CR until discharge, the anaerobic threshold (AT), maximum rate of oxygen consumption (VO2max),metabolic equivalent (MET) and 6MWD improved significantly in both groups compared with those at 7 days after CR in hospital [Hospital-based group: AT, (12.37±1.53) mL/(kg. min) vs. (14.77±1.57) mL/(kg. min); VO2max (17.87± 1.66 mL/(kg. min) vs. (20.73±2.14) mL/(kg. min); MET (5.02±0.36) vs. (6.09±0.53); 6MWD (500±53.36) m vs. (582.5±57.6) m,P<0.01; Binary group: AT, (12.56±1.11) mL/(kg·min) vs. (14.30±1.23) mL/(kg. min); V02max, (17.28±1.38) mL/(kg. min) vs. (20.02±1.37) mL/(kg. min); MET, (5.07±0.47)vs (5.94±0.46); 6MWD,(511.4±50.96) m vs. (590.3±56.1)m,P<0.01]. There was no significant difference in CR effects observed between two groups (P>0.05). Conclusions In post-MI patients,a binary model of CR training improved physical capacity and was a similarly effective form of CR as a entirely hospital-based approach. A home-based tele-monitored program facilitated patients' adherence to CR. The 6 minute walk experiment is economical and good evaluation on the CR effect of binary cardiac rehabilitation.
7.Screening and identification of a novel DNA aptamer against albumin
Xiaoou LI ; Yan HU ; Yacong AN ; Jinhong DUAN ; Xianda YANG
Basic & Clinical Medicine 2017;37(7):935-938
Objective To develop an albumin aptamer that may potentially serve as a selective ligand for albumin removal from experimental samples.Methods A single-stranded 59nt DNA library that contains 21 random oligo nucleotides was synthesized in vitro.An albumin aptamer A6 was developed by SELEX technique using bovine serum albumin (BSA) as target.The enrichment of aptamer and evaluation of its binding properties were monitored by flow cytometry.The secondary structure of A6 was predicted by MFord software.Results The aptamer A6 strongly bound to BSA with a Kd of 77.4 nmol/L,and had minimal cross reactivity with control proteins including ovalbu min,IgG,and trypsin.Conclusions Aptamer A6 may be a potential tool in albumin removal.
8.Effects of gypenosides to the immune deficit mouse's non-specific immunological function
Li ZHOU ; Kaihe YE ; Xianda REN
Chinese Journal of Primary Medicine and Pharmacy 2006;0(06):-
Objective To explore the pharmacological function of immune enhancer of gypenosides and discuss the dose-effect relationship.Methods The gypenosides was used as an immune enhancer to cure the immune deficit mouse and observe non-specific immunological function by carbon clear test.All of the mice were administrated with CTX and then were divided into six groups:control group,high dose group,middle dose group,lower dose group.Respectively,the carbon clear test was performed in each group and the variation of non-specific immune function was observed.Results The carbon clear test showed that the index of carbon clear test in control group was markedly decreased while the index of carbon clear testing high and middle group was increased.The effect of gypenosides was dose-dependent on the non-specific immune.Conclusion Gypenosides can markedly increase the non-specific immune function.
9.Mycophenolic acid:a novel immunosuppressive drug
Hongliang LI ; Xianda REN ; Kaihe YE
Chinese Journal of Pathophysiology 2001;17(6):575-579
Mycophenolate acid is a novel immunosuppressive drug. Its target of action is the isomerⅡof inosine 5'-monophosphate dehydrogenase(IMPDH). It inhibits de nove purine synthesis and also decreases expression of adhesive molecule. It inhibits selectively the proliferation of lymphocyte, so that it has strong immunosuppressive effects on various rejections to allograft or xenograft, and on autoimmune diseases, and has the features of higher potency and lower toxicity.
10.Progresses on antitumor effect of snake venom active components
Xiaohong LI ; Shaohui CAI ; Xianda REN
Chinese Journal of Pathophysiology 2000;0(10):-
Many snake venoms contain complex mixtures of pharmacologically important molecules, some of which show potential therapeutic value in the treatment of cancer and other human disorders. In this review, we mainly reports the effects of snake venom active components, such as disintegrins and lectins in paralyzing cancer cells, blocking on cell migration, interaction with integrins, inhibition of tumor dissemination and angiogenesis. The advanced researches on the snake venom's apoptosis-inducing components on tumors are also introduced. [

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