Objective To investigate the therapeutic potential of brain-derived neurotrophic factor (BDNF) and Schwann cells(SCs) in experimental autoimmune neuritis (EAN) and assess the effect and mechanism.Methods EAN model was established by immunization of Lewis rats with 400 μg of specific peptide P2(57-81)and complete Freund adjuvant.In the therapy group,the SCs (n =28) and the combination of BDNF administration and SCs (n =48) were labeled by the nuclear fluorescent dye injected into the intracerebroventricularly in 14 d after immunization.Transplanted cell migration tracking respectively were at 25,35 and 45 days after immunization.The rats were observed for signs of disease daily and subjected to clinical score,of which the sciatic nerves were subjected to histopathological examination (hematoxylin eosinstaining,luxol-fast-green and immunohistochemical staining).The inflammatory cell infiltration and demyelination were assessed,and the CD4,CD8,CD68,S-100 and nerve growth factor (NGF) positive cells numbers were compared among the 3 different groups.Results AIl the rats had the neurological deficits.Compared with control group,there were no significant differences in SCs therapy group.In SCs + BDNF therapy group,the recovery of paralytic symptom was faster and the score was lower after immunization 45 d.After immunization 25 and 35 days,both the inflammatory cells infiltration (EAN model group:325.8 ±10.8,221.4 ± 35.2;SCs + BDNF transplantation group:307.3 ±4.6,197.2 ± 16.8; t =2.172,P =0.031 ;t=3.756,P=0.000) and the expression of CD4+,CD8+ T cells and CD68+ macrophages were reduced.After immunization 35,45 days,the demyelination degree (EAN model group:3.4 ± 0.5,2.9 ± 0.8 ; SCs +BDNF transplantation group:2.9 ±0.8,2.3 ±0.5) was reduced (t =-7.408,P =0.000;t =-6.092,P =0.000),the expression of S-100 is higher,and NGF was lower than the control group in each time point after immunization.Conclusions SCs transplanted into the cerebellar ventricle of animals can migrate into the sciatic nerve.The combination of BDNF administration and SCs transplantation may represent an effective strategy by reducing inflammation reaction,improving the expression of S-100 in the donor cell,and reducing NGF irritability heighten in sciatic nerve.However,delivery of SCs alone is inefficiency to the treatment of EAN.

0.05) ;TNF-? 0.5 ?g and TNF-? 1.0 ?g pretreatment groups showed reduced volume of lesion(all P

BACKGROUND: Some studies suggest that pre-injection of tumor necrosis factor-α (TNF-α)can protect focal cerebral ischemia in mice. Cerebral ischemia tolerance is related to the increase of TNF-α level; on the other hand, TNF-α is an injurious cytokine associated with stroke. Circulating antibody against anti-TNF-α can protect reperfused injury.OBJECTIVE: To study the effects of TNF-α pretreatment and post-treatment on cerebral ischemia-reperfusion injury and explore possible mechanism.DESIGN: Randomized controlled study.SETTING: Neurological Department, the Second Hospital Affiliated to Harbin Medical University.MATERIALS: The experiment was conducted at the Animal Experiment Center of Harbin Medical University from January to April 2002. Totally 120 healthy adult male Wistar rats were randomly divided into the following 8 groups: TNF-α 0.05 μg, 0.5 μg and 1.0 μg pretreatment groups and PBS group, TNF-α 0.05 μg, 0.5 μg and 1.0 μg post-treatment groups and PBS group with 15 in each group.METHODS: The focal brain ischemia model of middle cerebral artery occlusion (MCAO) was made using inserting thread method. TNF-α of different doses (0.05 μg, 0.5 μg or 1.0 μg) or PBS was injected intracisternally and 22-hour reperfusion, 8 rats from each group were killed. Then the perhour reperfusion, 7 rats from each group were killed. Then pathological changes were observed, glial fibrillary acidic protein (GFAP) and intercellular adhesion molecule-1 (ICAM-1) expression were inspected by immunohistochemical method. Histopathological and immunohistochemical evaluation was made with the computer-assisted image analyzing system,and the number of GFAP positive cells and ICAM-1 positive vessels in each hemisphere was counted.riliary acidic protein and ICAM-1.infarct volume: TNF-α 0.5 μg and TNF-α 1.0 μg pretreatment groups showed reduced volume of lesion; infarct volume reduced by 70.9% in TNF-α 0.5 μg pretreatment rats and 66.5% in TNF-α 1.0 μg pretreatment rats. TNF-α 0.5 μg and TNF-α 1.0 μg post-treatment groups showed increased volume of lesion; infarct volume increased by 22.3% in TNF-α 0.5 μg post-treatment rats and 46.7% in TNF-α 1.0 μg post-treatment rats.TNF-α 0.05 μg and 1.0 μg pretreatment groups did not differ significantly (P ＞ 0.05), but there was an obvious difference between TNF-α 0.5 μg and pared with PBS pretreatment group, TNF-α 0.5 μg and 1.0 μg pretreatment groups showed lessened tissue damage and edema. Compared with PBS post-treatment group, TNF-α 0.5 μg and TNF-α 1.0 μg post-treatment fibriliary acidic protein and ICAM-1: TNF-α 0.5 μg and TNF-α 1.0 μg pretreatment groups showed reduced volume of glial fibriliary acidic protein and ICAM-1 (P ＜ 0.05); but TNF-α 0.5 μg and TNF-α 1.0 μg posttreatment groups showed increased volume of glial fibriliary acidic protein and ICAM-1 (P ＜ 0.05). TNF-α 0.05 μg and 1.0 μg pretreatment groups did not differ significantly (P ＞ 0.05); but there was an obvious difference between TNF-α 0.5 μg and 1.0 μg post-treatment groups (P ＜ 0.05).cerebral ischemia reperfusion injury. This effect is not related to the repair given after cerebral ischemia reperfusion, ischemia exacerbates, which is α are determined by whether TNF-αis given before or after cerebral ischemia in a dose-dependent manner.

ObjectiveTo observe occupational therapy combing with physical therapy on the upper limb movement function and the activities of daily living for the old stroke patient.Methods62 stroke patients with hemiplegia were divided into the observation group (occupational therapy with physical therapy) and control group (physical therapy). All patients were evaluated with Bathel Index (BI) and Fugl-Meyer Assessment (FMA) before and 3 months after treatment.ResultsThe scores of BI and FMA increased significantly in the observation group compared with the control group after the treatment (P<0.01).ConclusionOccupational therapy combing with physical therapy can obviously improve the upper limb movement function and the activities of daily living for the old stroke patient.

Objective To investigate the variation of procalcitonin(PCT)level and the significance of PCT for the diagnosis of infection during perioperative period of valve replacement for rheumatic heart disease.Methods Routine blood testing and procalcitonin(PCT)level were measured in the perioperative period of 56 patients with rheumatic heart disease receiving valve replacement.Prophylactic antibiotics management was given based on the serum procalcitonin level especialy that 3 days after operation or later.The postoperative infective complications and the duration of prophylactic antibiotics management were recorded and assessed.Results The duration of prophylactic antibiotics for all patients were 4.6 ± 2.0 days.Six patients were suffered from poor incision healing and one was suffered from pulmonary infection.There were no severe postoperative infective complications.The PCT of the patients without postoperative infection rise to peak level on the 1st day after operation and return to normal on the 3rd day.There was no significant difference in the PCT levels between the two groups.The duration for PCT descending to 0.25 mg/L was 3.7 ± 2.5 days.The PCT level of the patients suffered from pulmonary infection went up again after infection on the 5th day and return to normal on the 9th day.No severe postoperative infective complications happened after withdrawn of prophylactic antibiotics if PCT had descended tobelow 0.25 mg/L after operation.Conclusions The serum PCT level may be a good parameter for the prediction or diagnosis of infective complication in the perioperative period of patients undergoing valve replacement for rheumatic heart disease.It can be a useful marker to guide the use of prophylactic antibiotics.

Objective To investigate the present situation of institutes of rehabilitation medicine in Guangxi. Methods From March to July, 2015, all 287 hospitals in Guangxi were investigated with the Human Resource Statistics of Guangxi Rehabilitation Medicine Depart-ment and the Specialist Questionnaire of Guangxi Rehabilitation Medicine Department by E-mail through the local Health and Family Plan-ning Commissions. Results There were 125 rehabilitation medicine departments with 2146 personnels in Guangxi, 0.2 therapists per bed in average. The proportion was 1∶0.725 for rehabilitative physicians to therapists;1∶1.92∶3.14 for senior, intermediate and primary title for physicians;1∶8∶63 for therapists and 1∶5.6∶18.9 for nurses. About 91.3%of the department of rehabilitation medicine was in the tertia-ry hospitals and was able to provide the services of physical therapy, occupational therapy, speech therapy, swallowing rehabilitation, cogni-tive rehabilitation, psychological therapy and rehabilitation engineering, and so on. Conclusion Rehabilitation has made a big progress com-pared with that in 2009 in Guangxi, in term of institutes, human resources and the service ability. However, the distribution of institutions and human resources remains unbalanced.

Objective: To understand the epidemiologic characteristics of outbreaks, caused by norovirus-GⅡ.2、GⅡ.17 and GⅡ.4/Sydney in Guangdong Province from 2013 to 2017 and to provide scientific evidence for epidemic prevention and control. Methods: Incidence data of norovirus outbreaks in Guangdong from January 1(st) 2013 to November 30(th) 2017 were collected from Public Health Emergency Management Information System. RT-PCR was performed for every case of each outbreak to detect norovirus nucleic acid and gene sequencing was conducted to identify the genotype of norovirus. Characteristics of norovirus GⅡ.2, GⅡ.17 and GⅡ.4/Sydney outbreaks were analyzed. Directly standardized method was used to calculate the proportion of symtoms as diarrhea and vomitting. Results: From January 1(st) 2013 to November 30(th) 2017, a total of 167 norovirus outbreaks were reported in Guangdong, and 115 outbreaks were caused by norovirus GⅡ.2, GⅡ.17 and GⅡ.4/Sydney respectively. The outbreaks caused by norovirus GⅡ.2 accounted for 39.68% (25/63) in primary schools, 28.57% (18/63) in child care settings, 25.40% (16/63) in middle schools and 6.35% (4/63) in universities. Outbreaks caused by norovirus GⅡ.17 accounted for 41.03% (16/39) in middle schools, 20.51% (8/39) at workplaces, 15.38% (6/39) in primary schools, 12.82% (5/39) in universities, 5.13% (2/39) in communities and child care settings respectively. The outbreaks caused by norovirus GⅡ.4/Sydney accounted for 53.85% (7/13) in universities, 15.38% (2/13) in child care settings and at workplaces respectively, 7.69%(1/13) in primary schools and middle schools respectively. The outbreaks caused by norovirus GⅡ.2 had 77.78% (49/63) of contact transmission, 17.46% (11/63) of food-borne transmission. The outbreaks caused by norovirus GⅡ.17 showed 53.85% (21/39) of food-borne transmission, 15.38% (6/39) of contract transmission, 12.82% (5/39) of water-borne transmission. The outbreaks caused by norovirus GⅡ.4/Sydney had 53.85% (7/13) of food-borne transmission, 38.46% (5/13) of the contact transmission. In terms of the clinical manifestations, the standardized proportion of vomit was 73.76% and the proportion of diarrhea was 42.85% in cases infected with norovirus GⅡ.2, the proportion of standardized of vomit was 76.37% and the proportion of diarrhea was 51.40% in cases infected with norovirus GⅡ.17, with the standardized proportion of vomit was 54.10% and the proportion of diarrhea was 55.95% in cases infected with norovirus GⅡ.4/Sydney. Conclusions: The outbreaks caused by norovirus GⅡ.2 through contact transmission mainly occurred in primary schools, child care settings and middle schools. The outbreaks caused by norovirus GⅡ.17 through food-borne transmission mainly occurred in middle schools and at workplaces. The outbreaks caused by norovirus GⅡ.4/Sydney food-borne transmission and contact mainly occurred in universities.
Adolescent ; Caliciviridae Infections/epidemiology* ; Child ; Child, Preschool ; Diarrhea/etiology* ; Disease Outbreaks ; Epidemics ; Gastroenteritis/epidemiology* ; Genotype ; Humans ; Norovirus/isolation & purification* ; Reverse Transcriptase Polymerase Chain Reaction ; Sentinel Surveillance ; Vomiting/etiology*