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1.
Academic Journal of Second Military Medical University ; (12): 648-652, 2020.
Article in Chinese | WPRIM | ID: wpr-837847

ABSTRACT

Coronavirus disease 2019 (COVID-19) has become a pandemic threatening public health. Its pathogen, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), can be transmitted from person to person through droplets, contact and other ways. How to avoid further spread of the virus when patients with suspected or confirmed COVID-19 receive treatment in the operating rooms or intensive care units has become the focus and difficulty faced by medical staff. Here we discussed the dissemination characteristics of SARS-CoV-2, the perioperative environments, the disease management and infection control measures under specific operation.

2.
Chinese Journal of Experimental Traditional Medical Formulae ; (24): 36-42, 2019.
Article in Chinese | WPRIM | ID: wpr-802416

ABSTRACT

Objective: To observe the effect of Hei Xiaoyaosan on expressions of β-amyloid 1-42 peptide(Aβ1-42),glycogen synthase kinase-3β(GSK-3β),neprilysin(NEP),insulin-degrading enzyme(IDE) in the hippocampus area of Alzheimer's dementia mice. Method: After weighing, 42 APP/PSI bivalent transgenic mice were randomly divided into 4 groups:10 mice in the model group, 10 mice in the positive drug control group, 11 mice in the high-dose Hei Xiaoyaosan group, and 11 mice in the low-dose Hei Xiaoyaosan group; 10 wild C57BL/6J mice of the same age and strain were used for negative control group. Drugs were administered to mice by gavage once a day for 12 weeks. Then the behavior of all the mice were detected by Morris water maze, the morphological changes in hippocampal neurons were observed by hematoxylineosin(HE) staining, the expressions of Aβ1-42, GSK-3β, NEP and IDE proteins in hippocampus were detected by immunohistochemistry. Result: After 3 months of treatment, compared with negative control groups, the average escaping latency periods prolonged significantly, and the number of cross-platform was decreased significantly in model group (Pβ1-42 and GSK-3β proteins in model mice hippocampus were significantly increased (PPPβ1-42 and GSK-3β proteins in the hippocampus of drug groups were significantly decreased (PPPConclusion: Hei Xiaoyaosan can significantly improve the learning and memory abilities of AD mice, which may be related to the reduction of cognitive impairment in AD mice by regulating abnormal deposition and degradating Aβ in the hippocampus.

3.
Chinese Journal of Experimental Traditional Medical Formulae ; (24): 8-14, 2019.
Article in Chinese | WPRIM | ID: wpr-801791

ABSTRACT

Objective: To study the effect of Hei Xiaoyaosan on endoplasmic reticulum stress in hippocampal neurons of Alzheimer's disease (AD) model mice, including behavioral, histopathology and amyloid precursor protein (APP), protein kinase endoplasmic reticulum kinase (PERK) expressions. Method: The 42 4-month-old SPF-grade double transgenic (APP/PS1) mice were randomly divided into the high-dose group and the low-dose group, the donepezil hydrochloride group and the model group, and 10 C57BL mice of the same age were used as the blank group. Firstly, they were adapted to the environment for one week. After 2 months of treatment with different drug interventions, Morris water maze behavior was used to test the learning and memory abilities of each group of mice. After 1 month of treatment, histopathological changes in the hippocampus of each group of mice were observed by light microscopy. The expressions of APP, PERK protein and mRNA in the endoplasmic reticulum of hippocampus were detected by immunohistochemistry (IHC) and real-time fluorescent quantitative polymerase chain reaction (Real-time PCR). Result: After drug intervention, compared with the blank group, the escape latency of the AD model group was significantly prolonged (PPPPPConclusion: Hei Xiaoyaosan can significantly improve the learning and memory abilities of AD mice, which may be related to the reduction of the excessive stress response of endoplasmic reticulum to alleviate cognitive impairment in AD mice.

4.
Chinese Journal of Information on Traditional Chinese Medicine ; (12): 51-55, 2018.
Article in Chinese | WPRIM | ID: wpr-707056

ABSTRACT

Objective To investigate effects of angelica polysaccharide on learning and memory abilities, Ach, ChAT, AChE, SOD, MDA in serum, APP and Aβ1-42 in hippocampus in model rats with Alzheimer disease (AD); To explore the mechanism of angelica polysaccharide for the treatment of AD. Methods Seventy SPF Wistar rats were selected for learning and memory ability by water maze. 10 rats were randomly selected (half female and half male) as sham-operation group, and the others were injected with Aβ25-35 by stereotatic techniques, copying AD model rats. 50 rats for learning and memory ability by water maze were successfully divided into model group, positive group, angelica polysaccharide low-, medium-, and high-dose groups, with 10 rats in each group. Rats in model group and sham-operation group were given normal saline for gavage, while rats in medication groups were given relevant medicine for gavage, 2 mL/(100 g?d), for 28 d. The learning and memory ability of rats in each group was tested by Morris water maze during 25-28 days, and the contents of Ach, ChAT, AChE, SOD, MDA in serum and APP and Aβ1-42 in hippocampus were determined. Results Compared with the sham-operation group, the escape latent period of model group was significantly prolonged in place navigation experiment; the target quadrant time was shortened; the latent time for the first time to reach the original escape platform was longer in spatial probe test; the residence time of crossing the original platform position and the target quadrant was shorter; the levels of Ach, the activity of ChAT and SOD in serum decreased; the levels of MDA, the activity of AChE in serum increased; the levels of APP and Aβ1-42 in hippocampus increased, with statistical significance (P<0.05, P<0.01). Compared with model group, the escape latent period of each medication group was shortened in different degrees after the intervention treatment; the residence time of target quadrant was prolonged; the latent time for the first time to reach the original escape platform was shortened; the number of cross platform increased; the levels of Ach, the activity of ChAT and SOD in serum increased; the levels of MDA and the activity of AChE in serum decreased; the levels of APP and Aβ1-42 in hippocampus significantly decreased, with statistical significance (P<0.05, P<0.01). Conclusion Angelica polysaccharide may effectively improve the learning and memory of ability of AD model rats to improve anti-free radical oxidation and promote Aβ metabolism and promote learning and memory ability of AD model rats, which have some preventive and therapeutic effects on AD.

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