Objective To observe the influence of δ-opioid reperfusion in rats with change in serum protein S-100B level and to explore the neuroprotective effect of DADLE during cerebral resuscitation. Method The model of global cerebral ischemia and reperfusion was induced by bilateral common carol id artery occlusion combined with hypotension. Fifty SD rats were randomly divided into five groups: sham operation group, model group, DADLE pretreated group, DADI.E treated postischemia group, DADLE treatment during reperfusion group ( n = 10 for each group) .In sham operation group,the rats were operated without ischemia and treatment; in model group, rats had global cerebral ischemia and reperfusion model up without any treament; in DADLE pretreated group, rats received DADlE before ischemia; in DADLE treatment postischemia group,rats had DADLE immediately after ischemia; in DADLE treatment during reperfusion group,rats got DADLE during early reperfusion. After the establishment of model, serum protein S-JOOB was measured by using ELlSA.One-way analysis of variance and SNK test were used for comparison between groups. Results The serum protein S-100B level was (475.56±1.93) pg/ml in sham operational group and that was much lower than that in model group and DADLE treatment groups. While the levels of serum protein S-100B in all DADLE treatment groups were reduced significantly in comparison with model group. There were no differences in the levels of serum protein KS-100B between DADLE treatment groups. Conclusions The δ-opioid receptor DADLE exerts neuroprotective effects on global cerebral ischemia and reperfusion in rats.

Objective To investigate the effects and mechanisms of up-regulation of heme oxygenase-1(HO-1)on uric acid-induced adipocyte dysfunction. Methods Human bone marrow-derived mesenchymal stem cells(MSCs)were cultured in vitro and second or third generation MSCs were selected and recultured in an adipogenic induction medium,with the addition of various amounts of fructose and uric acid to find the optimal concentrations.Then,the HO-1 inducer cobalt protoporphyrin (CoPP)and the HO-1 inhibitor tin porphyrin(SnMP)were added successively.There were five independent samples in each group.Adipogenesis in MSC-derived adipocytes and droplets were measured by spectrophotometry,expression levels of xanthine oxidase(XO)and NADPH were measured by Western blott,superoxide levels were measured by Luminous spectrometer,and levels of adipogenic markers and HO-1 were measured by reverse transcription-polymerase chain reaction(RT-PCR). Results Fructose at 500 μmol/L and uric acid at 50 mg/L were the optimal concentrations for stimulating adipogenesis in MSC-derived adipocytes(P< 0.05).Compared with the controls,fructose significantly increased the levels of XO expression and uric acid(P< 0.05),and concurrent treatment with fructose and CoPP effectively reversed both XO and uric acid levels to those of the controls(all P<0.05).However,SnMP negated the beneficial effects of CoPP(P< 0.05).Additionally,uric acid decreased the number of small droplets and increased expression levels of adipogenic markers and NADPH(all P<0.05),but proadipogenic mediator levels were reduced with the addition of CoPP(all P<0.05).Furthermore,uric acid reduced expression levels of Wnt 10b,but had no significant effect on HO-1 expression,andthese effects were reversed upon the addition of CoPP(all P<0.05). Conclusions Upregulation of HO-1 can reduce the levels of XO and uric acid,adipogenesis in MSC-derived adipocytes,and also the expression of adipogenic markers and NADPH.Therefore,it plays a role in antioxidant stress.HO-1 agonists may be targets for treating organ damage and controlling weight in elderly obese patients with metabolic syndrome.

Objective: To investigate the efficacy and safety of Rivaroxaban for elderly patients with thrombotic diseases. Methods: This was a retrospective study.A total of 301 elderly patients taking Rivaroxaban from October 2012 to November 2017 at the Second Medical Center of the Chinese PLA General Hospital were consecutively selected.The ages ranged from 60 to 102 years, with an average age of(86.5±8.4)years.Anticoagulation regimens were developed based on comprehensive evaluation of indications, creatinine clearance, ischemia and bleeding risk.Patients were divided into a Rivaroxaban 2.5-5.0 mg/d group(n=72), a 10.0 mg/d group(n=205), and a 15.0-20.0 mg/d group(n=24). Hepatic function, renal function, and coagulation indexes were measured before and after the administration of Rivaroxaban.Fatal bleeding, cardiovascular deaths, all-cause deaths, non-fatal bleeding and thromboembolic events were recorded during the follow-up period. Results: The average dose of Rivaroxaban was(9.3±3.0)mg/d, and the minimum dose was 2.5 mg/d.The average follow-up time was(14.9± 13.9)months and the longest follow-up time was 48 months.One patient had intracranial bleeding.Twenty patients(6.6%)died with a cumulative incidence of 25.2%, three(1.0%)died of cardiac events, and 55.0% died of pneumonia and multiple organ failure.Forty patients(13.3%)had non-fatal hemorrhagic events with a cumulative incidence of 42.4%.Seven patients(2.3%)had thromboembolic events with a cumulative incidence of 16.0%, including 2 cases of non-fatal myocardial infarction, 3 cases of cerebral infarction and 2 cases of deep vein thrombosis.After treatment, levels of prothrombin time and fibrinogen significantly increased while levels of D-dimer significantly deceased(P<0.05). Conclusions Compared with previous reports, low-dose Rivaroxaban is safe and effective for elderly patients with thrombotic diseases.However, the risk of bleeding and ischemia should be comprehensively evaluated, and appropriate doses of Rivaroxaban should be selected individually.

Objective To study the association between serum TB level and target organ damage in elderly metabolic syndrome (MS) patients.Methods Two hundred and forty-five elderly MS patients admitted to our hospital were included in this study.Their general condition was recorded,their serum TB,blood glucose,blood lipids,blood urea nitrogen and creatinine (Cr) levels were measured,and their left ventricular mass (LVM) and left ventricular mass index (LVMI) were detected by parallel echocardiography.Results Correlation analysis showed that the serum TB level was positively related with that of Cr (r=0.168,P=0.009) but not related with LVM,LVMI,serum blood urea nitrogen level,prevalence of chronic renal insufficiency and chronic kidney disease (P＞0.05).Regression analysis showed that serum TB level was an independent risk factor for urea in MS patients (OR=-0.27,95％CI:-0.48-0.06,P=0.01;OR=1.27,95％CI:0.33-2.22,P=0.01).Quantile analysis of serum TB level showed that the serum Cr level was significantly higher in Q76-100 group,Q51-75 group and Q26-50 group than in Q1-25 group (P=0.031).Conclusion Serum TB level is positively related with endogenous Cr clearance in elderly MS patients,suggesting that mildly elevated serum TB level may be a protective factor for impaired renal function in elderly MS patients.

BACKGROUND: Artificial intelligence (AI) technology represented by deep learning has made remarkable achievements in digital pathology, enhancing the accuracy and reliability of diagnosis and prognosis evaluation. The spatial distribution of CD3 + and CD8 + T cells within the tumor microenvironment has been demonstrated to have a significant impact on the prognosis of colorectal cancer (CRC). This study aimed to investigate CD3 CT (CD3 + T cells density in the core of the tumor [CT]) prognostic ability in patients with CRC by using AI technology. METHODS: The study involved the enrollment of 492 patients from two distinct medical centers, with 358 patients assigned to the training cohort and an additional 134 patients allocated to the validation cohort. To facilitate tissue segmentation and T-cells quantification in whole-slide images (WSIs), a fully automated workflow based on deep learning was devised. Upon the completion of tissue segmentation and subsequent cell segmentation, a comprehensive analysis was conducted. RESULTS: The evaluation of various positive T cell densities revealed comparable discriminatory ability between CD3 CT and CD3-CD8 (the combination of CD3 + and CD8 + T cells density within the CT and invasive margin) in predicting mortality (C-index in training cohort: 0.65 vs. 0.64; validation cohort: 0.69 vs. 0.69). The CD3 CT was confirmed as an independent prognostic factor, with high CD3 CT density associated with increased overall survival (OS) in the training cohort (hazard ratio [HR] = 0.22, 95% confidence interval [CI]: 0.12-0.38, P <0.001) and validation cohort (HR = 0.21, 95% CI: 0.05-0.92, P = 0.037). CONCLUSIONS We quantify the spatial distribution of CD3 + and CD8 + T cells within tissue regions in WSIs using AI technology. The CD3 CT confirmed as a stage-independent predictor for OS in CRC patients. Moreover, CD3 CT shows promise in simplifying the CD3-CD8 system and facilitating its practical application in clinical settings.
Humans ; Lymphocytes, Tumor-Infiltrating ; Colorectal Neoplasms ; Artificial Intelligence ; Reproducibility of Results ; Prognosis ; CD8-Positive T-Lymphocytes ; Tumor Microenvironment