AIM: To study the nutritional role of the normal conditioned medium of astrocytes (NCMA) on the injured cerebral cortex neurons induced by cerebral hypoxia and reoxygenation in vitro. METHODS: The normal and damaged neurons induced by hypoxia and reoxygenation were cultured with normal conditioned medium of astrocytes (NCMA) after the cerebral cortical astrocytes and neurons of rats were isolated. The viability and survival rate of cultured neurons were investigated by MTT method. RESULTS: NCMA increased the viability and survival rate of cultured neurons. CONCLUSION: NCMA has nutritional and supporting roles on cultured neurons.

Objective:To investigate the effects of enteral immunonutrition on the intestinal barrier function and immune function in patients with severe pneumonia.Methods:Ninety patients with severe pneumonia were randomly divided into experimental group (n =45) and control group (n =45).All patients were received conventional therapy.In addition,patients in experimental group were given enteral immunonutrition,while patients in control group were given regular enteral nutrition.The changes of general conditions,intestinal barrier function index and immune function index were determined before treatment,on day 5 and 10 after treatment.The time of invasive mechanical ventilation,APACHE Ⅱ score and clinical effects of two groups were determined on day 10 after treatment.Results:Compared with those before treatment,in both groups,body temperature,respiration,heart rate,white blood cell count were all significantly decreased on day 5 and 10 after treatment (P ＜ 0.05).The above parameters were significantly lower in experimental group than control group on day 10 after treatment (P ＜ 0.05).The levels of serum ET,DAO were significantly decreased on day 5 and 10 after treatment in two groups compared with those before treatment (P ＜ 0.05),and these parameters were significantly lower in experimental group than control group(P ＜0.05).The number of CD3 and CD4 positive cell and the ratio of CD4 +/CD8 + were significantly increased on day 5 and 10 after treatment in two groups when compared with those before treatment (P ＜ 0.05),and these parameters were higher in experimental group than those in control group(P ＜ 0.05).The time of invasive mechanical ventilation,APACHE Ⅱ score were lower in experimental group than those in control group on day 10 after treatment (P ＜ 0.05).The rate of clinical response were higher in the experimental group than that in the control group on day 10 after treatment (P ＜ 0.05).Conclusion:Enteral immunonutrition is more effective in protecting the intestinal barrier function,improving the immune status,enhancing the immunity,reducing the time of invasive mechanical ventilation,and achieving the clinical effects of patients with severe pneumonia.

Objective To observe the clinical efficacy and side effects of docetaxel combined with epirubicin dose-dense regimen and convention regimen neoadjuvant chemotherapy in patients with triple negative breast cancer.Methods Eighty-one patients with triple negative breast cancer from January 1, 2008 to December 31, 2011 were selected, and they were divided into dose-dense group (40 cases)and convention group(41 cases).All the patients received 2-6 cycles of docetaxel combined with epirubicin neoadjuvant chemotherapy.Chemotherapy scheme was intravenous drip of docetaxel (75 mg/m2)for 1 h and intravenous drip of epirubicin(90 mg/m2)in Day 1.Every 14 d was 1 cycle in dose-dense group,every 21 d was 1 cycle in convention group.The clinical efficacy and side effects of 2 groups were observed and compared, and the 5-year survival rates were analyzed.Results All patients were evaluated.The pathologic complete response rate and the response rate in dose-dense group were significantly higher than those in convention group:20.0%(8/40)vs.12.2%(5/41)and 85.0%(34/40)vs.70.7%(29/41),and there were statistical differences(P<0.05).The 5 years disease-free survival rate and overall survival rate in dose-dense group were higher than those in convention group: 77.5%(31/40)vs.58.5%(24/41)and 87.5%(35/40)vs.73.2%(30/41),and there were statistical differences(P<0.05).In side effects, there were no statistical differences in the incidences of bone marrow suppression, gastrointestinal reactions, abnormal liver function and hair loss between 2 groups (P > 0.05).Conclusions In the neoadjuvant chemotherapy of triple negative breast cancer, compared with convention regimen, the dose-dense regimen can receive higher pathologic complete response rate and response rate,prolong disease-free survival rate and overall survival rate.Side effects is similar,and it is worth to be used in clinic.

Objective:To investigate the correlation between serum uric acid level and symptomatic intracranial hemorrhage (sICH) and outcomes after endovascular therapy (EVT) in elderly patients with anterior circulation acute ischemic stroke (AIS).Methods:Elderly patients with AIS (aged ≥65 years) received EVT in Beijing Geriatric Hospital and Xuanwu Hospital from December 2017 to December 2020 were retrospectively enrolled. sICH was defined as cerebral parenchymal hemorrhage revealed by CT within 72 h after admission and the Naitonal Institutes of Health Stroke Scale score increased by ≥4 compared with the baseline. At 90 d after onset, the clinical outcome was evaluated by the modified Rankin Scale. 0-2 was a good outcome and 3-6 was a poor outcome. The clinical data of the sICH group and non-sICH group, as well as the good outcome group and poor outcome group were compared. Multivariate logistic regression analysis was used to determine the independent correlation between serum uric acid level and sICH and poor outcomes. Results:A total of 122 patients were enrolled, their age was 73.89±6.24 years, and 73 (59.8%) were male. Fifty-two patients (42.6%) had hemorrhagic transformation, 27 (22.1%) had sICH, and 28 (23.8%) had a good outcome at 90 d after onset. The serum uric acid in the sICH group was significantly lower than that in the non-sICH group ( P=0.002), while the serum uric acid in the good outcome group was similar to that in the poor outcome group ( P=0.510). Multivariate logistic analysis showed that the lower serum uric acid was an independent risk factor for sICH (odds ratio 0.994, 95% confidence interval 0.990-0.998; P=0.011). Conclusion:The lower serum uric acid level was an independent risk factor for sICH after EVT in elderly patients with AIS, but it was not associated with the outcomes.