Vascular dementia iS one of the common forms of dementia,and its occurrence is closely associated with cerebrovascular disease.There are abundant stem cells in cord blood that differentiate into neural stem cells.The studies of stem cell transplantation in the treatment of ischemic cerebrovascular disease and neurodegenerative diseases have achieved some results. Cord blood stem cells may also he used in the treatment of vascular dementia.

Objective To observe the changes of cerebral CT and auditory event related potentials (ERP, P300) for finding the effective method for the comprehensive evaluation of the patients with Alzheimer's disease. Methods Cerebral CT, P300, and Mini Mental State Examination (MMSE) were employed to assess 30 patients with Alzheimer's disease. Results Latency and amplitude of wave of P300 in patients were prolonged and decreased, respectively. Cerebral CT found an obvious atrophy in the frontal and temporal lobes of cerebra. These changes were obviously correlated with the severity of dementia. Conclusion Using cerebral CT, P300, and MMSE can offer morphometric, functional and psychological information which is helpful for precise assessment of patients with Alzheimer's disease.

Objective To investigate the roles of differentiation and proliferation related proteins in neural stem cells (NSCs) in rats treated with L monosodium glutamate (MSG). Methods Tissue proteins were extracted from the rat forebrain. Western blotting was used to investigate the changes of differentiation and proliferation related proteins in NSCs in rats treated with MSG. Results Compared with those in rats of the normal control group, the related proteins (Notch1, hes5, Mash1, and NeuroD) in NSCs were significantly decreased in MSG rats at 30 and 60 d, especially for Notch1 and hes5 ( P

Objective To explore the changes of differentiation and proliferation of neural stem cells in rats treated with corticosterone (CORT). Methods Adult SD rats were administered with CORT (10 mg?kg -1 ?d -1 ) by consecutive subcutaneous injection for 14 days. Single and double immunohistochemical stainings were used to identify the neural stem cells and differentiated neural cells in adult rats. Results Compared with that in the normal control group, the number of BrdU immunohistofluorescence positive cells and BrdU+NF200, BrdU+NeuroD, BrdU+GFAP double immunostaining positive cells in the cerebral cortex, hippocampus, and hypothalamus were markedly decreased ( P

Objective To explore the roles of expression of brain derived neurotrophic factor (BDNF) in the brain of old rats after chronic cerebral perfusion deficiency in the pathogenesis of vascular dementia. Methods Rat model of vascular dementia was established by modified Pulsinelli 4 vessel occlusion (4VO) and divided into 3d (3 d), 1 week (1 w), 2 weeks (2 w), 4 weeks (4 w) and 2 months (2 m) groups. Computer controlled initiative avoidance response shuttle box system was used to test the learning and memory capacity of rats. Immunohistochemical method was used to examine the expression of BDNF in CA1 region of the hippocampus and cortex of temporal and frontal lobe. Results Compared with those in control group, BDNF positive cells in CA1 region were decreased significantly in 4VO 1 w group ( P 0 05). Compared with those in the control group, BDNF positive cells in the cortex of temporal and frontal lobe were increased significantly in 4VO 3 d group ( P

0.05 ). MMSE, HDS scores of patients and the concentration of AVP could be obviously elevated (P

Objective To observe the effect of the human cord blood mesenchymal stem cells transplanted into hippocampus CA1 area of vascular dementia rats,and the possible synergistic effect of intraperitoneal injection of monosialoganglioside(GM1).Methods Human cord blood was collected with informed consent,and the stem cells were screened,cultured,purified,then were marked with BrdU.A total of 120 2VO dementia-established rats were randomly and equally divided into the model group, cell transplant group(1.5?105 cultured cells),GM1 injection group(10 mg/kg,once a day for 14 d),and combination group,and another 5 normal rats served as control group.Five rats of every group besides control group were killed on days 1,3,7,14,21 and 28 for pathological observation.The function of learning and memory were examined with the Morris water maze on day 28.The survival BrdU marked cells and the growth associated protein-43(GAP-43) positive cells were detected by immunohistochemical staining.Results The learning and memory ability was decreased obviously in the rats of model group,but the situation was improved in the 3 treatment group,especially in combination group.The transplanted cells were survival in the brain and gathered in the hippocampus area,and those in combination group demonstrated more survival cells from day 14.There were more proliferated-GAP-43-positive cells around the injection site and in the cortex in the treatment groups,and the most cells were observed in combination group.Conclusion The human cord blood stem cells can survive in rat brain,and improve the cognitive function of vascular dementia rats.Intraperitoneal injection of GM1 exerts a synergistic effect in this treatment.

Setting criterion of teaching system,improving examination methods and strengthening the cultivation of basic medical skills and practice ability might be beneficial to the increase of the practice quality.

AIM: To analyze the infection characteristics and clinical treatment outcome of patients with fungal keratitis(FK)in Jingzhou area, so as to provide basis for clinical diagnosis and treatment of FK. METHODS: The data of 176 patients with FK diagnosed by etiology in Jingzhou Central Hospital from January 2015 to July 2020 were collected, and the epidemiological characteristics, identification results of fungal strains, drug sensitivity and clinical treatment outcome of the patients were analyzed. RESULTS:Among the 176 patients with FK, 118 were male and 58 were female, and the ratio of male to female is 2.03:1. The age of onset was the largest number of patients in 50-59 years old and 60-69 years old. The peak seasons of onset were April to June and October to December. Risk factors include trauma and possible history of trauma, ocular surface diseases, post ophthalmic surgery, wearing corneal contact lenses and long-term local drug use. The main pathogens were Fusarium(39.8%), aspergillus(30.7%), alternaria(15.9%)and candida(5.1%). The results of drug sensitivity showed that voriconazole and amphotericin B were sensitive, while the drug resistance rate of fluconazole was very high. There were 125 eyes improved or cured after conservative treatment, 12 eyes were injected into corneal stroma, 15 eyes were covered with conjunctival flap or amniotic membrane transplantation, and 21 eyes were treated with corneal transplantation. Enucleation of ocular contents was performed in 8 eyes, including 5 eyes with severe endophthalmitis after conjunctival flap covering. CONCLUSION:The incidence of FK in Jingzhou area is mostly middle-aged and elderly men, mostly caused by corneal trauma in the process of agricultural labor. The main pathogens were fusarium and aspergillus. It is very important to select reasonable antifungal drugs and treatment methods according to the drug sensitivity results.

Objective To observe the destructive effects of chlorine disinfectants on the nucleic acid of novel coronavirus, and to assess the feasibility of real-time fluorescent quantitative PCR technology for the evaluation of the disinfection effect of novel coronavirus. Methods A suspension quantitative inactivation test was used to observe the inactivation effects of different concentrations of chlorine containing disinfectants and different action times on the novel coronavirus. RT-PCR method was used to detect novel coronavirus nucleic acid for the disinfection effect evaluation. Results The chlorine disinfectants of 1 000 mg/L and 2 000 mg/L could destroy the nucleic acid of ew coronavirusafter application for over 30s. The chlorine disinfectant of 750 mg/L could destroy the nucleic acid of new coronavirusafter application for over 15min. Chlorine disinfectant of 500 mg/L could not completely destroy the nucleic acid of new coronavirusafter 30 min action. Conclusion The disinfection method stipulated in the national prevention and control plan using 1 000mg / L effective chlorine for the epidemic sites of new coronavirus for 30 minutes could completely destroy the nucleic acid of new coronavirus. The Real-time quantitative PCR can be used to evaluate the disinfection effect of new coronavirus.