Objective To investigate the influence of diabetes mellitus (DM) on left ventricular(LV) remodeling in patients with acute ST-segment elevation myocardial infarction (STEMI) treated by primary percutaneous coronary intervention (PCI) within 12 hours of symptom onset. Methods Four hundred and fifty-one consecutive patients with acute STEMI treated by primary PCI were prospectively enrolled in the current study. Baseline, angiographic and PCI features and prevalence of LV remodeling at one-week during hospitalization and 6-month clinical follow-up by two-dimensional echocardiography were compared between 93 diabetic and 358 non-diabetic patients. Results Despite similar baseline clinical and angiographic characteristics, symptom-to-door time was longer (399±106 min vs. 321±116 min, P=0.006) and prevalence of multivessel disease was higher (65.6%vs. 51.7%, P=0.02) in diabetic patients. More patients in diabetic group had LV remodeling at 6-month clinical follow-up (29.0%vs. 17.3%, P=0.01), and DM was an independent predictor of LV remodeling (RR 2.1, 95%CI 1.31-4.79, P=0.02). The rate of rehospitalization due to heart failure did not differ between diabetic and non-diabetic patients (12.9%vs. 8.1%, P=0.15), however, more adverse events occurred in patients with LV remodeling comparing to those without LV remodeling (25.8% vs. 6.6%, P < 0.001). Conclusions Diabetic patients with STEMI often have an increased risk of LV remodeling after treated by primary PCI. Thus, comprehensive therapeutic strategy for diabetic patients presented with STEMI is required considering the poor prognosis of these patients with LV remodeling.

Objective To analyse and compare the effects and safety of early use (in emergency room, intravenous loading followed by infusion) with bolus injection during primary PCI of tirofiban, on post-procedural TIMI flow and 30d clinical outcomes. Methods Seven hundred and seven patients with acute STEMI treated by primary PCI in Ruijin hospital were retrospectively and enrolled screened. Among them, 86 patients with single bolus intra-coronary injection of tirofiban (25 μg/kg) during the procedure were served as observation group. Baseline, angiographic, PCI features and rate of major adverse cardiac events (MACE) at 30 d follow-up were compared with those received early intravenous infusion of tirofiban (10ug/kg bolus followed by 0.15μg/(kg·min) intravenous infusion)(control group, n=239). Results Compared with control group, patients in observation group were older[(63.8±11.4) vs. (57.9±8.8), P=0.01], had higher prevalence of hypertension (58.6%vs. 51.0%, P=0.005), multivessel disease (57.0%vs. 34.3%, P<0.001), and female in gender (40.7%vs. 25.1%, P=0.006). Post-procedural TIMI flow in culprit vessel and TMP grade were comparable between the two groups (P=0.66 and P=0.48, respectively). Reduction in TIMI minimal bleeding events were found in the observation group (2.3%vs. 9.6%, P=0.03). MACE free survival rate at 30d clinical follow-up was similar between the two groups (P=0.48). Conclusions Single bolus intra-coronary injection of tirofiban exerts similar effects in post-procedural TIMI flow, TMP grade in culprit vessel and 30d clinical outcomes compared with early use in emergency room with intra-venous loading and infusion, nevertheless, intra-coronary injection resulted in significantly reduced TIMI minimal bleeding events. Prospective, randomized clinical study is mandatory to prove our current results.

Objective To evaluate the commutability of 22 processed materials for serum alanine aminotransferase measurements which were performed in 11 routine assays without and 2 assays with pyridoxal-5′-phosphate.Methods 100 serum specimens were collected in Beijing Hospital,Zhao Yang Hospital and Tong Ren Hospital from May,2017 to August,2017.50 individual specimens together with fresh frozen human serum pools(HSPs), external quality assessment(EQA)materials, commercial calibrators and controls were measured by 11 routine assays without pyridoxal-5′-phosphate.Measurement results of the 50 individual samples were pairwise analyzed by Deming regression for slopes and intercepts, and 95%prediction interval(PI)were calculated to evaluate the commutability of processed materials.Another 50 individual specimens and 22 above-mentioned materials were analyzed by 2 assays with pyridoxal-5′-phosphate as the evaluated methods and internationally recognized reference method as the comparative method.The ordinary linear regression(OLR)and 95% PI were used to identify the commutability of 22 materials.Results The Deming slopes ranged from 0.879 to 1.064 and intercepts from -1.96 to 3.30;the OLR slopes were 0.905 and 0.955 while intercepts were -6.71 and 9.53.The HSPs were commutable for 51/57 and 56/57 assay pairs.The EQA materials, commercial calibrators and controls showed noncommutability from 8/57 to 47/57,38/57 and pairs after that, and from 13/57 to 43/57 assay pairs, respectively.Conclusion The lyophilized materials including EQA materials, commercial calibrators and controls demonstrated poor commutability in different degrees.

BACKGROUND: Syringomyelia is a progressive chronic disease that leads to nerve pain, sensory dissociation, and dyskinesia. Symptoms often do not improve after surgery. Stem cells have been widely explored for the treatment of nervous system diseases due to their immunoregulatory and neural replacement abilities. METHODS: In this study, we used a rat model of syringomyelia characterized by focal dilatation of the central canal to explore an effective transplantation scheme and evaluate the effect of mesenchymal stem cells and induced neural stem cells for the treatment of syringomyelia. RESULTS: The results showed that cell transplantation could not only promote syrinx shrinkage but also stimulate the proliferation of ependymal cells, and the effect of this result was related to the transplantation location. These reactions appeared only when the cells were transplanted into the cavity. Additionally, we discovered that cell transplantation transformed activated microglia into the M2 phenotype. IGF1-expressing M2 microglia may play a significant role in the repair of nerve pain. CONCLUSION Cell transplantation can promote cavity shrinkage and regulate the local inflammatory environment.Moreover, the proliferation of ependymal cells may indicate the activation of endogenous stem cells, which is important for the regeneration and repair of spinal cord injury.

Background: Using commutable external quality assessment (EQA) materials is important for monitoring successful harmonization efforts. We assessed the commutability of four human serum pool (HSP) preparations to identify candidate EQA materials for alanine aminotransferase (ALT) and aspartate aminotransferase (AST) activity measurement. Methods: One set each of 85 clinical samples (CSs) was collected for ALT and AST activity measurement. The 15 candidate EQA materials included four types of HSP preparations (A to D): materials A, C, and D contained human original recombinant (HOR) aminotransferases; materials B was mixed leftover samples. The CSs and 15 candidate EQA materials were analyzed using seven routine assays, and the ln-transformed results were analyzed in 21 assay pairs. Commutability was assessed using Deming regression, with a 95% prediction interval (CLSI approach) and the difference in bias with an error component model (International Federation of Clinical Chemistry and Laboratory Medicine [IFCC] approach). Results: For ALT, all materials were commutable for 14–21 assay pairs according to the CLSI and IFCC approaches. For AST, B01-03 showed commutability for 14-21 assay pairs, and C01-03 and D01-03 showed commutability for no less than 10 assay pairs according to the two approaches. A01-06 were commutable for 9-16 assay pairs according to the CLSI approach, but for 6-9 assay pairs according to the IFCC approach. Conclusions Mixed leftover samples showed desirable commutability characteristics as candidate EQA materials for routine aminotransferase activity measurements. Human serum bases supplemented with HOR were commutable for most routine ALT activity measurements.

[Abstract] Objective: To investigate the effects of miR-223-3p on the proliferation and apoptosis of hepatocellular carcinoma (HCC) cells by regulating Ras-related C3 botulinum toxin substrate 1 (RAC1) and its possible mechanism. Methods: Thirty pairs of HCC and corresponding para-cancer tissues resected in Jilin Central Hospital from August 2016 to August 2018 were collected for this study; in addition, human HCC cell lines SMMC-7721, BEL-7402, HepG2 and human normal hepatocyte QSG-7701 were also collected. The expression level of miR-223-3p in HCC tissue and cell lines was detected by qPCR. miR-223-3p mimics, miR-223-3p inhibitor and siRAC1 were transfected into SMMC-7221 cells, respectively. CCK-8 assay, Colony formation assay and Annexin V-FITC/PI staining Flow cytometry were used to detect the proliferation, clone formation and apoptosis of SMMC-7721 cells, respectively. The relationship between miR-223-3p and RAC1 was confirmed by Dual luciferase reporter gene assay. The protein level of RAC1 in SMMC-7721 cells was detected by Western blotting. Results: The expression of miR-223-3p in HCC tissues was significantly lower than that in paracaner tissues (P<0.01), and had significant correlation with pathological characteristics, such as tumor size, TNM stage, EdmondsonSteiner grade (all P<0.05 or P<0.01). miR-223-3p expression in HCC cell lines was significantly lower than that in QSG-7701 cells with the lowest expression in SMMC-7721 cells. Dual luciferase reporter gene assay confirmed that RAC1 was a target gene of miR-223-3p, and miR-223-3p negatively regulated RAC1 expression. Over-expression of miR-223-3p significantly inhibited the proliferation and colony formation (P<0.05 or P<0.01) of SMMC-7721 cells and promoted cell apoptosis (P<0.01). Contrarily, knockdown of miR-223-3p reversed the inhibitory effect of miR-223-3p mimics on cells. Conclusion: miR-223-3p over-expression inhibits proliferation and colony formation and promotes apoptosis of HCC cells, the mechanism of which may be related with its targeted down-regulation of RAC1.

BACKGROUNDCollaterals to occluded infarct-related coronary arteries (IRA) have been observed after the onset of acute ST-elevation myocardial infarction (STEMI). We sought to investigate the impact of early coronary collateralization, as evidenced by angiography, on myocardial reperfusion and outcomes after primary percutaneous coronary intervention (PCI).

METHODSAcute procedural results, ST-segment resolution (STR), enzymatic infarct size, echocardiographic left ventricular function, and major adverse cardiac events (MACE) at 6-month follow-up were assessed in 389 patients with STEMI undergoing primary PCI for occluded IRA (TIMI flow grade 0 or 1) within 12 hours of symptom-onset. Angiographic coronary collateralization to the occluded IRA at first contrast injection was graded according to the Rentrop scoring system.

RESULTSLow (Rentrop score of 0 or 1) and high (Rentrop score of 2 or 3) coronary collateralization was detected in 329 and 60 patients, respectively. Patients with high collateralization more commonly had prior stable angina and right coronary artery occlusion, but less often had left anterior descending artery occlusion. At baseline, these patients presented with less extent of ST-segment elevation and lower serum levels of creatine kinase myocardial band (CK-MB) and cardiac troponin I (cTnI). Procedural success rate, STR, corrected TIMI flame count, and area under the curve of CK-MB and cTnI measurements after the procedure were similar between patients with high collateralization and those with low collateralization (for all comparisons P > 0.05). There were no differences in left ventricular ejection fraction and rates of MACE at 6 months according to baseline angiographic collaterals to occluded IRA.

CONCLUSIONSIn patients with acute STEMI undergoing primary PCI within 12 hours of symptom-onset, coronary collateralization to the occluded IRA was influenced by clinical and angiographic features. Early recruitment of collaterals limits infarct size at baseline, but has no significant impact on myocardial reperfusion after the procedure and subsequent left ventricular function and clinical outcomes.

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Angioplasty, Balloon, Coronary ; Coronary Angiography ; Female ; Humans ; Male ; Middle Aged ; Myocardial Infarction ; diagnostic imaging ; therapy ; Treatment Outcome ; Young Adult