1.Standardization of electronic medical records data in rehabilitation
Yifan TIAN ; Fang XUN ; Haiyan YE ; Ye LIU ; Yingxin ZHANG ; Yaru YANG ; Zhongyan WANG ; Meng ZHANG ; Xiaoxie LIU ; Yanyan YANG ; Bin ZENG ; Mouwang ZHOU ; Yuxiao XIE ; Guangxu XU ; Jiejiao ZHENG ; Mingsheng ZHANG ; Xiangming YE ; Fubiao HUANG ; Qiuchen HUANG ; Yiji WANG ; Di CHEN ; Zhuoying QIU
Chinese Journal of Rehabilitation Theory and Practice 2025;31(1):33-44
ObjectiveTo explore the data standard system of electronic medical records in the field of rehabilitation, focusing on the terminology and coding standards, data structure, and key content categories of rehabilitation electronic medical records. MethodsBased on the Administrative Norms for the Application of Electronic Medical Records issued by the National Health Commission of China, the electronic medical record standard architecture issued by the International Organization for Standardization and Health Level Seven (HL7), the framework of the World Health Organization Family of International Classifications (WHO-FICs), Basic Architecture and Data Standards of Electronic Medical Records, Basic Data Set of Electronic Medical Records, and Specifications for Sharing Documents of Electronic Medical Records, the study constructed and organized the data structure, content, and data standards of rehabilitation electronic medical records. ResultsThe data structure of rehabilitation electronic medical records should strictly follow the structure of electronic medical records, including four levels (clinical document, document section, data set and data element) and four major content areas (basic information, diagnostic information, intervention information and cost information). Rehabilitation electronic medical records further integrated information related to rehabilitation needs and characteristics, emphasizing rehabilitation treatment, into clinical information. By fully applying the WHO-FICs reference classifications, rehabilitation electronic medical records could establish a standardized framework, diagnostic criteria, functional description tools, coding tools and terminology index tools for the coding, indexing, functional description, and analysis and interpretation of diseases and health problems. The study elaborated on the data structure and content categories of rehabilitation electronic medical records in four major categories, refined the granularity of reporting rehabilitation content in electronic medical records, and provided detailed data reporting guidance for rehabilitation electronic medical records. ConclusionThe standardization of rehabilitation electronic medical records is significant for improving the quality of rehabilitation medical services and promoting the rehabilitation process of patients. The development of rehabilitation electronic medical records must be based on the national and international standards. Under the general electronic medical records data structure and standards, a rehabilitation electronic medical records data system should be constructed which incorporates core data such as disease diagnosis, functional description and assessment, and rehabilitation interventions. The standardized rehabilitation electronic medical records scheme constructed in this study can support the improvement of standardization of rehabilitation electronic medical records data information.
2.Establishment and stress analysis of a finite element model for adolescent cervical disc herniation
Yuxin ZHAO ; Liang LIANG ; Feng JIN ; Yangyang XU ; Zhijie KANG ; Yuan FANG ; Yujie HE ; Xing WANG ; Haiyan WANG ; Xiaohe LI
Chinese Journal of Tissue Engineering Research 2025;29(3):448-454
BACKGROUND:Cervical disc herniation can cause pain in the neck and shoulder area,as well as radiating pain in the upper limbs.The incidence rate is increasing year by year and tends to affect younger individuals.Fully understanding the biomechanical characteristics of the cervical spine in adolescents is of great significance for preventing and delaying the onset of cervical disc herniation in this age group. OBJECTIVE:To reconstruct cervical spine models for both healthy adolescents and adolescent patients with cervical disc herniation utilizing finite element analysis techniques,to analyze the motion range of the C1-T1 cervical vertebrae as well as the biomechanical characteristics of the annulus fibrosus,nucleus pulposus,endplates,and the cartilage of the small joints. METHODS:A normal adolescent's cervical spine and an adolescent patient with cervical disc herniation were selected in this study.The continuous scan cervical spine CT raw image data were imported into Mimics 21.0 in DICOM format.The C1-T1 vertebrae were reconstructed separately.Subsequently,the established models were imported into the 3-Matic software for disc reconstruction.The perfected models were then imported into Hypermesh software for meshing of the vertebrae,nucleus pulposus,annulus fibrosus,and ligaments,creating valid geometric models.After assigning material properties,the final models were imported into ABAQUS software to observe the joint motion range of the C1-C7 cervical vertebrae segments under different conditions,and to analyze the biomechanical characteristics of the annulus fibrosus,nucleus pulposus,endplates,and small joint cartilage of each cervical spine segment. RESULTS AND CONCLUSION:(1)In six different conditions,the joint motion range of the C1 vertebra in the cervical spine models of both normal adolescent and adolescent patient with cervical disc herniation was higher than that of the other vertebrae.Additionally,the joint motion range of each cervical spine segment in normal adolescent was greater than that in adolescent patient with cervical disc herniation.(2)In the cervical spine model of normal adolescent,the maximum stress values in the annulus fibrosus and nucleus pulposus were found on the left side during C2-3 flexion conditions(0.43 MPa and 0.17 MPa,respectively).In the cervical spine model of adolescent patient with cervical disc herniation,the maximum stress values were found on the left side during C7-T1 flexion conditions(0.54 MPa and 0.18 MPa,respectively).(3)In the cervical spine model of normal adolescent,the maximum stress value on the endplate was found on the left side of the upper endplate of C3 during flexion conditions(1.46 MPa).In the model of adolescent patient with cervical disc herniation,the maximum stress value on the endplate was found on the left side of the lower endplate of C7 during flexion conditions(1.32 MPa).(4)In the cervical spine model of normal adolescent,the maximum stress value in the small joint cartilage was found in the C2-3 left rotation conditions(0.98 MPa).In adolescent patient with cervical disc herniation,the stress in the small joint cartilage significantly increased under different conditions,especially in C1-2,with the maximum stress found during left flexion(3.50 MPa).(5)It is concluded that compared to normal adolescent,adolescent patient with cervical disc herniation exhibits altered cervical curvature and a decrease in overall joint motion range in the cervical spine.In adolescent with cervical disc herniation,there is a significant increase in stress on the annulus fibrosus,nucleus pulposus,and endplates in the C7-T1 segment.The stress on the left articular cartilage of the C1-2 is notable.Abnormal cervical curvature may be the primary factor causing these stress changes.
3.Etiological characteristics and molecular evolution of the first mpox case in Huai’an City of Jiangsu Province
Pengfei YANG ; Fang HE ; Qingli YAN ; Heyuan GENG ; Tong GAO ; Qiang GAO ; Chenglong XIONG ; Haiyan PENG
Chinese Journal of Schistosomiasis Control 2025;37(1):85-92
Objective To analyze the virus subtypes, molecular evolutional and molecular transmission network features of the first confirmed mpox case in Huai’an City, Jiangsu Province, so as to provide insights into understanding of the transmission and evolution dynamics of mpox virus and formulation of the mpox control strategy in the city. Methods Genomic DNA was extracted from swabs of the first confirmed mpox case’s skin lesions in Huai’an City, and the amplicon sequencing library was constructed using the hypersensitive mpox virus whole-genome capture kit. High-throughput sequencing was performed using the GridION X5 nanopore sequencer on the Nanopore sequencing platform, and single nucleotide polymorphism (SNP) analysis of mpox virus genome sequences was performed following sequence assembly. In addition, phylogenetic analysis, genetic genealogy and molecular traceability analysis were performed. Results The virus whole genome sequence of the first confirmed mpox case was successfully obtained by high-throughput sequencing, with a full length of 197 182 bp, and was named hMpxV/China/JS-HA01/2023, which belonged to the clade IIb (West African clade) lineage B.1.3. Compared with the mpox virus reference sequence MPXV-M5312_HM12_Rivers-001 (GenBank accession number: NC_063383), the genome sequence of the Huai’an virus isolate carried 86 SNPs, including 40 SNPs in the coding region as non-synonymous mutations and 73 SNPs as nucleotide mutations caused by APOBEC3 (APOBEC3). Of the 97 mpox virus gene sequences, 79 sequences were included in the molecular network (81.44%), and the threshold of the genetic distance accessed to the network was 0.35/105. There were two large molecular transmission clusters and one scattered cluster in the molecular transmission network of the mpox virus, andthehMpxV/China/JS-HA01/2023 sequence was located in the large cluster. The 97 gene sequences formed 92 haplotypes, including three shared haplotypes Hap_4, Hap_6 and Hap_38, and an exclusive haplotype Hap_1 of hMpxV/China/JS-HA01/2023 generated from mutation of the exclusive haplotype Hap_43, while the exclusive haplotype Hap_43 was generated from mutation of the shared haplotype Hap_38. Conclusions The whole genome sequence of the mpox virus isolated from the first confirmed mpox case in Huai’an City has been successfully obtained, and the molecular evolutionary and molecular transmission network characteristics of the virus have been preliminarily understood.
4. Investigation and analysis of the current status of clinical research nurses
Liming CHEN ; Wenyan ZHAO ; Rui DING ; Yi FANG ; Haiyan ZHANG ; Fan HUANG ; Cai CAO
Chinese Journal of Clinical Pharmacology and Therapeutics 2024;29(4):455-459
AIM: To investigate and analyze the current situation and needs of clinical research nurses in China, in order to provide scientific basis for constructing a training system for research nurses, promoting standardized training, and achieving standardized management for them. METHODS:A self-made questionnaire was used to investigate 102 research nurses from nearly 70 well-known clinical trial institutions in China. The contents of the questionnaire mainly included the general information, professional experience and work content of the research nurses, the sense of accomplishment and training needs of clinical trial work. RESULTS: Among the 102 research nurses surveyed, 92.15% have a bachelor's degree or above; 53.92% of those have intermediate or higher professional titles; 74.51% of them are part-time research nurse. Among professional experiences, 19.61% have more than 10 years of clinical trial experience; 47.06%, 40.20%, and 21.17% of surveyed research nurses were authorized to participate in clinical trial drug management, sample management, and quality control; 70.59% of research nurses have a high sense of achievement in their daily work. In terms of education and training needs, clinical trial related laws and regulations, standardized training for clinical trial protocol implementation, and good clinical practice (GCP) are the three most important aspects. CONCLUSION: Clinical research nurses in China have a relatively high level of education and nursing experience, but there is still a large gap in the amount of professional full-time clinical research nurses in China. Due to the rapid development of innovative drugs and devices, as well as the urgent need to improve the clinical research system, it is necessary to establish a training, assessment, and evaluation system for research nurses that is in line with China's national conditions in order to improve the professional level of research nurses, and improve the quantity and quality of clinical trial research on innovative drugs and devices in China.
5.Finite element model establishment and stress analysis of lumbar-sacral intervertebral disc in ankylosing spondylitis
Zhijie KANG ; Zhenhua CAO ; Yangyang XU ; Yunfeng ZHANG ; Feng JIN ; Baoke SU ; Lidong WANG ; Ling TONG ; Qinghua LIU ; Yuan FANG ; Lirong SHA ; Liang LIANG ; Mengmeng LI ; Yifei DU ; Lin LIN ; Haiyan WANG ; Xiaohe LI ; Zhijun LI
Chinese Journal of Tissue Engineering Research 2024;28(6):840-846
BACKGROUND:Ankylosing spondylitis is a chronic inflammatory disease with chronic rheumatic immunity.Soft tissue ossification and fusion and spinal stiffness can cause biomechanical changes. OBJECTIVE:To reconstruct the lumbar-sacral intervertebral disc in ankylosing spondylitis patients with lumbar kyphosis by finite element analysis,and to study the range of motion of each segment of T11-S1 and the biomechanical characteristics of annulus fibrosus and nucleus pulposus. METHODS:The imaging data were obtained from an ankylosing spondylitis patient with lumbar kyphosis.The original CT image data of continuously scanned spine were imported into Mimics 21.0 in DICOM format,and T11-S1 was reconstructed respectively.The established model was imported into 3-Matic software in the format of"Stl"to reconstruct the intervertebral disc,and the fibrous intervertebral disc model was obtained.The improved model was further imported into Hypermesh software,and the vertebra,nucleus pulposus,annulus fibrosus and ligament were mesh-divided.After the material properties were given,the model was imported into ABAQUS software to observe the range of motion of each vertebral body in seven different working conditions of T11-S1,and analyze the biomechanical characteristics of each segment of annulus fibrosus and nucleus pulposus. RESULTS AND CONCLUSION:(1)The range of motion of L1 vertebrae was higher than that of other vertebrae under six different working conditions:extension,forward flexion,rotation(left and right),and lateral flexion(left and right).The maximum range of motion was 2.18° during L1 vertebral flexion,and the minimum range of motion was 0.12° during L5 vertebral extension.(2)The annular fiber flexion at L2-L3 segments was greater than the extension(P<0.05),and the annular fiber flexion at L3-L4 and L4-L5 segments was less than the extension(P<0.05).The left rotation of L1-L2 annular fibers was greater than the right rotation(P<0.05).The left flexion of the annulus was greater than the right flexion in L1-L2,L2-L3,L3-L4,L4-L5 and L5-S1 segments(P<0.05).(3)The nucleus pulposus stresses of T11-L12,L1-L2,L2-L3,L3-L4 and L4-L5 segments in forward flexion were greater than in extension(P<0.05).The left rotation of T12-L1 and L3-L4 segments was smaller than the right rotation(P<0.05),and that of T11-T12,L1-L2,and L2-L3 segments was larger than the right rotation(P<0.05).The left flexion was larger than the right flexion in the T11-S1 segment.(4)It is concluded that in ankylosing spondylitis patients with lumbar kyphosis,the minimum range of motion of the vertebral body is located at the L5 vertebral body in extension.To prevent fractures,it is recommended to avoid exercise in the extension position.During the onset of lumbar kyphosis in patients with ankylosing spondylitis,the maximum stress of the annulus fibrosus and nucleus pulposus is located in the L1-L2 segment,which is fixed and will not alter with the change of body position.The late surgical treatment and correction of deformity should focus on releasing the pressure of the annulus fibrosus and nucleus pulposus in this segment to avoid the rupture of the annulus fibrosus and the injury of the nucleus pulposus.
6.Biomechanical features of posterior"Y"osteotomy and fixation in treatment of ankylosing spondylitis based on finite element simulation analysis
Le ZHANG ; Zhenhua CAO ; Yunfeng ZHANG ; Yangyang XU ; Feng JIN ; Baoke SU ; Lidong WANG ; Xing WANG ; Ling TONG ; Qinghua LIU ; Yuan FANG ; Lirong SHA ; Haiyan WANG ; Xiaohe LI ; Zhijun LI
Chinese Journal of Tissue Engineering Research 2024;28(12):1842-1848
BACKGROUND:Ankylosing spondylitis is a progressive inflammation of spinal stiffness deformity caused by tissue ossification and fibrosis.The posture of ankylosing spondylitis patients is abnormal and their activities are limited that minor injuries can lead to thoracolumbar fractures.Traditional medical image observation limits doctors'preoperative decision planning and postoperative disease prevention for ankylosing spondylitis treatment. OBJECTIVE:Based on the spinal model of ankylosing spondylitis patients before and after posterior spinal cancellous ossification osteotomy("Y"osteotomy for short),to explore the biomechanical changes of"Y"osteotomy and fixation in the treatment of ankylosing spondylitis. METHODS:Based on the preoperative and postoperative CT images of an ankylosing spondylitis patient who went to the Second Affiliated Hospital of Inner Mongolia Medical University,a three-dimensional spine model(T11-S1)before and after"Y"osteotomy(L3 osteotomy)was reconstructed in Mimics 19.0 software.A 7.5 Nm torque was applied to the top of T11 vertebral body to simulate the movement of the spine under six conditions:flexion,extension,left bending,right bending,left rotation and right rotation.Finally,the range of motion of each vertebral body,the stress of each intervertebral disc,and the stress of the screw rod system were simulated. RESULTS AND CONCLUSION:(1)After"Y"type osteotomy and posterior fixation,the range of motion of all vertebrae in the spine decreased,and the loss rate of upper vertebrae was large(L1:77.95%).(2)The maximum stress of the spinal intervertebral disc before operation occurred at the L1-L2 segment(0.55 MPa),and the maximum stress of the spinal intervertebral disc after operation occurred at the T11-T12 segment(0.50 MPa),and the stress of intervertebral disc below T12 was far less than that before operation.(3)The maximum stress of the screw rod system(166.67 MPa)occurred in the upper and middle segments of the rod body and the root of the pedicle screw.(4)In conclusion,the"Y"type posterior fixation operation enhances the stability of the spine and reduces the range of motion of the spine.The vertebral body decompression of the fixed segment is great and the stress-shielding phenomenon of the lower vertebral body is significant.The stiffness of the rod body and the stress concentration area of the pedicle screw should be strengthened to avoid the fracture of the rod caused by stress fatigue.
7.Visualization analysis of vascular stimulating scaffolds in bone tissue engineering
Yuan FANG ; Zhijie KANG ; Haiyan WANG ; Xiaohe LI ; Kai ZHANG
Chinese Journal of Tissue Engineering Research 2024;28(17):2708-2715
BACKGROUND:The study of the physical properties of scaffolds has always been a hot topic in the field of tissue engineering research.However,for vascular stimulating scaffolds,in addition to meeting the basic performance of the scaffold,other methods are also needed to promote the regeneration of blood vessels within the scaffold,in order to achieve the ultimate goal of repairing bone tissue. OBJECTIVE:A visualization analysis was carried out on the literature published in and outside China on scaffold stimulation for bone tissue engineering,to explore the research hotspots and research status in this field,and to provide a reference for subsequent studies. METHODS:Using the CNKI database and Web of Science core database as retrieval databases,the relevant literature on vascular scaffolds for bone tissue engineering was retrieved.The literature that did not conform to the research object was removed.The obtained data were imported into CiteSpace 6.1.R2 software.Visualization analysis was performed on authors,national institutions,and keywords in the research field. RESULTS AND CONCLUSION:(1)China,the United States,and Germany were the top three countries with the most articles on scaffold stimulation for bone tissue engineering.(2)The top 3 institutions in the CNKI database were Southern Medical University,Huazhong University of Science and Technology,and Donghua University.In the core database of Web of Science,Shanghai Jiao Tong University,Sichuan University and Chinese Academy of Sciences ranked the top 3 in terms of the number of institutional publications.(3)The top 3 keywords in the CNKI database were"tissue engineering,vascularization,angiogenesis".The top 3 keywords in the Web of Science core database were"mesenchymal stem cell,scaffold,vascularization".(4)Through the analysis of co-citation and highly cited references,the main concerns were as follows:vascularization strategies:scaffold design,angiogenic factor delivery,in vitro co-culture,and in vivo pre-vascularization.Technology:3D printing,electrospinning,vascular transplantation,vascular fusion.Mechanisms:immune regulation and macrophages,drug/growth factor delivery,the relationship between endothelial cells and osteoblasts,the paracrine relationship between bone cells and endothelial cells,signaling molecular pathways,angiogenesis,and anti-angiogenesis molecules.(5)The researches concerning vascular stimulating scaffolds in bone tissue engineering in and outside China attach great importance to the application of stem cells and 3D printing technology.Current research focuses on biological 3D printing technology,scaffold modification methods,and the development and application of intelligent biomaterials based on bone repair mechanisms.
8.The Effect of Chuanxiong (Rhizoma Chuanxiong) & Tianma (Rhizoma Gastrodiae) Herbal Pair on the Periorbital Mechanical Pain Threshold and AMPK/TRPA1 Pathway in the Trigeminal Ganglion of Migraine Model Rats
Xiao ZUO ; Liqi LIANG ; Lanqi TANG ; Ruina MENG ; Bingying FANG ; Haifang WANG ; Haiyan CUI ; Xiaohua LIU
Journal of Traditional Chinese Medicine 2024;65(7):722-727
ObjectiveTo explore the possible mechanism of Chuanxiong (Rhizoma Chuanxiong) & Tianma (Rhizoma Gastrodiae) herbal pair in treating migraines based on AMP-activated protein kinase (AMPK)/transient receptor potential A1 channel (TRPA1) pathway. MethodsForty-eight healthy male SD rats were randomly divided into control group, model group, and Chuanxiong Tianma medication group, with 16 rats in each group. The control group and model group were given 10 ml/kg of normal saline by gavage, while the Chuanxiong Tianma medication group was given 0.675 g/kg of Chuanxiong Tianma herbal pair by gavage, once daily for 8 consecutive days in both groups. Migraime model was performed before the last administration, with subcutaneous injection of 10 ml/kg of normal saline in the control group, and subcutaneous injection of 10 ml/kg of nitroglycerin in the model group and Chuanxiong Tianma medication group. The Von Frey filament was used to measure the periorbital mechanical pain threshold of rats. The enzyme-linked immunosorbent assay (ELISA) was used to determine the levels of calcitonin gene-related peptide (CGRP) in rat serum and cerebrospinal fluid. The nitric oxide (NO) assay kit was used to determine the NO level in serum and cerebrospinal fluid. RT-PCR was usedto detect the mRNA expression levels of immediate-early genes in the trigeminal ganglion of rats (c-Fos), CGRP, transient receptor potential V1 channel (TRPV1), AMPK alpha subunit (PRKAA), and TRPA1. Immunofluorescence was used to detect the number of c-Fos-positive cells in the trigeminal cervical complex (TCC) and the protein expression levels of phosphorylated AMPK (pAMPK) and TRPA1 in the trigeminal ganglion. ResultsCompared to those in the control group, the mechanical stimulation threshold and pAMPK protein expression in the model group decreased, while the levels of CGRP and NO in serum, c-Fos, CGRP, TRPV1 and TRPA1 mRNA levels in the trigeminal ganglion, TRPA1 protein expression, and the number of c-Fos-positive cells in the TCC significantly increased (P<0.05). Compared to those in the model group, the mechanical stimulation threshold and pAMPK protein expression in the Chuanxiong Tianma medication group significantly increased, while the levels of CGRP and NO in serum, c-Fos, CGRP, TRPV1 and TRPA1 mRNA levels in the trigeminal ganglion, TRPA1 protein expression, and the number of c-Fos-positive cells in the TCC significantly decreased (P<0.05). ConclusionChuanxiong Tianma herbal pair may improve migraine symptoms by regulating the AMPK/TRPA1 pathway in the trigeminal ganglion and increasing the mechanical pain threshold.
9.Factors affecting malnutrition among elderly patients with type 2diabetes mellitus
LIN Fang ; LIU Suzhen ; JIANG Haiyan
Journal of Preventive Medicine 2024;36(1):61-64, 69
Objective:
To investigate the factors affecting the development of malnutrition among the elderly patients with type 2 diabetes mellitus (T2DM), so as to provide insights into the prevention of malnutrition among the elderly patients with T2DM.
Methods:
Elderly T2DM patients at ages of 60 years and older admitted to Hangzhou First People's Hospital affiliated to Zhejiang University School of Medicine from June 2022 to June 2023 were recruited. Patients' demographics, number of medicines administered and comorbidities were collected using questionnaire surveys, and glycosylated hemoglobin (HbA1c), serum albumin (ALB) and hemoglobin levels were collected from medical records. The nutrition status was assessed with the new version of the Mini Nutritional Assessment Short Form (MNA-SF). Factors affecting the development of malnutrition were among the elderly T2DM patients identified using a multivariable logistic regression model.
Results:
A total of 382 elderly T2DM patients were enrolled, including 226 men (59.16%) and 156 women (40.84%) and with a mean age of (70.06±8.41) years. The prevalence of malnutrition was 22.25% among participants. Multivariable logistic regression analysis identified age (70 to 79 years, OR=1.261, 95%CI: 1.007-1.158; 80 years and older, OR=3.285, 95%CI: 1.618-6.662), three and more types of comorbidities (OR=2.790, 95%CI: 1.254-5.191), use of multiple medicines (OR=3.501, 95%CI: 1.841-6.658), sleep disorders (OR=1.613, 95%CI: 1.120-2.322), regular exercises (OR=0.280, 95%CI: 0.115-0.614), serum ALB of 35 g/L and greater (OR=0.272, 95%CI: 0.102-0.560) and HbA1c of 7% and higher (OR=2.914, 95%CI: 1.445-5.881) as factors affecting the development of malnutrition among elderly patients with T2DM.
Conclusions
The risk of malnutrition is associated with age, types of comorbidities, use of multiple medicines, sleep disorders, regular exercise, HbA1c and ALB among the elderly patients with T2DM. Periodical nutrition screening and intensified health education are recommended for T2DM patients.
10.Dexmedetomidine plays an anti-ischemic stroke role by increasing the release of GDNF
Haiyan YANG ; Xiaomei MA ; Fang WU ; Hui WANG
Acta Universitatis Medicinalis Anhui 2024;59(10):1729-1736
Objective To investigate the effect of dexmedetomidine(Dex)on the release of glial cell line-derived neurotrophic factor(GDNF)during the anti-ischemic stroke.Methods SD rats were randomly divided into sham group(Sham group),sham+dexmedetomidine group(Sham+Dex group),ischemic stroke group(IS group),ischemic stroke+dexmedetomidine group(IS+Dex group),ischemic stroke+dexmedetomidine group+anti-GDNF(IS+Dex+anti-GDNF group),with 15 rats in each group.IS model was established by Longa's methods.24 hours later,the neurological scores were evaluated.Then,the rats were sacrificed and the cerebral spinal fluid,as well as the peripheral blood,were collected to detect the content of GDNF.In addition,TTC staining was used to evaluate the area of cerebral ischemic infarction,and immunofluorescence was applied to detect the activation of astrocytes.Furthermore,the activation phenotype of astrocytes was detected by qRT-PCR.Results Compared with Sham group,there were no significant changes in all indexes of rats in Sham+Dex group.In IS group,the neurological score increased(P<0.05),the local infarction area appeared,the release of GDNF in peripheral and central system increased(P<0.05),and the microglia activation was induced by IS,and the expression of neuro-toxic and neuroprotective phenotype genes increased significantly(P<0.05).Compared with the IS group,the neurological function score of the rats in the IS+Dex group significantly decreased(P<0.05),the local infarct area was significantly reduced(P<0.05),and the release of GDNF further increased(P<0.05).The expression of neurotoxic astrocyte phenotype genes significantly decreased(P<0.05),while the expression of neuroprotective astrocyte phenotype genes further increased(P<0.05).However,intervention with anti-GDNF antibody obviously reversed the therapeutic effect of Dex compared with the IS+Dex group.Conclusion Dex can inhibit the pheno-type of neurotoxic astrocytes,increase the proportion of neuroprotective astrocytes,further promote the release of GDNF,and play an anti-ischemic stroke role.


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