Chiral samarium iodo and terbutylate derivatives as catalysts for MPV ketone reductions

Samarium iodo and terbutylate derivatives coordinated by various chiral ligands have been prepared and used in situ as new catalysts for MPV reductions of aromatic ketones. The most active catalyst is samarium terbutylate binaphtolate albeit with moderate enantioselectivity.     

Hymenolepis diminuta: Effect of infection on ion transport in colon and blood picture of rats

The aim of this study was to examine the effect of an infection with Hymenolepis diminuta on ion transport in an isolated colon and blood picture of rats. Fifty rats were orally infected with five cysticercoids of H. diminuta. The experimental groups of rats were assigned to four groups: group I - 8 days post-infection (dpi), group II - 16 dpi, group III - 40 dpi and group IV- 60 dpi. The control group comprised non-infected rats. The experiments consisted of measuring the transepithelial electrical potential difference (PD) and the transepithelial electrical resistance (R) of the rat colon under controlled conditions as well as during mechanical stimulation (MS) using a modified Ussing chamber. Ion transport was modified using inhibitors of the epithelial sodium channel (amiloride - AMI) and the epithelial chloride channel (bumetanide - BUME), and also using capsaicin (CAPSA), a substance which activates C-fibres. The experimental data presented in this study indicates that experimental hymenolepidosis inhibits sodium and chloride ion transport in the epithelium of the rat colon, with preserved tight junction continuity (except at 40 dpi) and a decreased mechanical sensitivity. The effect of capsaicin on ion transport in the rat colon was varied. In control rats it increased ionic current, and in H. diminuta-infected rats it did not cause any changes in PD.Blood picture in this study showed a statistically significantly lower red blood cells (RBC) count and haemoglobin (HGB) concentration in infected rats in comparison to non-infected. Red cell distribution width (RDW) values and platelet (PLT) count were negatively correlated with the duration of infection, whereas mean corpuscular volume (MCV) value was positively correlated. We did not observe leukocytosis during infection, and amongst the differential leukocyte counts eosinophils and basophils showed statistically significant lower values in infected rats in comparison to non-infected.Our results indicate that hymenolepidosis is associated with the activation of inflammatory mediators and stimulation of nervous fibres, which significantly affects the function of ion channels in the epithelium of the colon in the host. At the same time, a significant decrease in eosinophil count during infection suggests that such an infection did not trigger a strong immunological reaction in rats.     

五种国产与进口小鼠病毒ELISA抗体检测试剂盒的比较研究

目的评价国产小鼠病毒抗体ELISA检测试剂盒。方法选择国产与进口小鼠淋巴细胞脉络丛脑膜炎病毒（LCMV）、肝炎病毒（MHV）、仙台病毒（SV）、腺病毒（MAV）、细小病毒（MPV）ELISA抗体检测试剂盒,进行敏感性、特异性、精密性、稳定性、可信度试验比较。结果国产与进口试剂盒：同种试剂盒之间灵敏度相差最低为2倍,差异显著（P〈0.05）,最高为16倍,差异极显著（P〈0.01）;特异性试验显示每种试剂盒,与其他4种病毒均无交叉反应;精密性试验显示5种试剂盒批内平均变异系数均小于10%;稳定性试验显示5种试剂盒相对偏差均小于25%;分别选择已知36份小鼠血清进行检测,国产和进口LCMV、MHV、SV、MPV符合率均为100%;国产MAV符合率为86.1%,进口MAV符合率均为100%,二者之间差异极显著（P〈0.01）。结论除国产MAV试剂盒敏感性、可信度低于进口外,国产LCMV、MHV、SV、MPV试剂盒与进口同种试剂盒相比,在敏感性、特异性、精密性、稳定性和可信度方面均良好。     

The utility of inflammation and platelet biomarkers in patients with acute coronary syndromes

Introduction

Thrombotic and inflammatory mechanisms are involved in the pathophysiology of acute coronary syndrome (ACS). The aim of the study was the evaluation of inflammation (white blood cells count/WBC, C-reactive protein/CRP, interleukin-6/IL-6) and platelet (platelet count/PLT, mean platelet volume/MPV, large platelet/LPLT, beta-thromboglobulin/β-TG) biomarkers in the groups of ACS patients depending on the severity of signs and symptoms and compared to controls without coronary artery disease.

Early signatures of bleeding and mortality in patients on left ventricular assist device support: novel methods for personalized risk-stratification

Background: Left ventricular assist devices (LVADs) provide support for patients with end-stage heart failure. The aims of this study were to determine whether baseline analysis and early trends in routine laboratory data, platelet activity, and thromboinflammatory biomarkers following LVAD implantation reveal trends that predict personalized risks of one-year gastrointestinal (GI) bleeding, stroke, pump thrombosis, drive-line infections and mortality in patients on LVAD support.

Methods: We performed an observational study at the University of Kentucky with 61 participants who underwent first-time LVAD implantation. Blood was collected at baseline and post-op days 0, 1, 3 and 6 as well as clinical follow-up. Demographics, clinical characteristics, one-year adverse events and routine laboratory data were collected from electronic medical records. Platelet function and plasma biomarkers were profiled.

Results: Evaluation of routine laboratory results revealed that sustained thrombocytopenia and increased mean platelet volume (MPV) were associated with development of GI bleeding and mortality. Platelet function at follow-up visit predicted one-year bleeding events. Thrombotic biomarker sCD40L strongly predicted one-year GI bleeding at baseline before implantation and within the first week following LVAD implant.

Conclusions: Early trends in routine bloodwork and platelet function may serve as novel signatures of patients at risk to experience adverse events.     

颈动脉超声定量参数联合MPV/PC比值、NLR对急性缺血性脑卒中患者预后不良的预测价值

摘要 目的：探讨颈动脉超声定量参数联合平均血小板体积（MPV）/血小板计数（PC）比值、中性粒细胞/淋巴细胞比值（NLR）对急性缺血性脑卒中（AIS）患者预后不良的预测价值。方法：选择2020年3月至2022年3月合肥市第二人民医院收治的97例AIS患者,所有患者均行颈动脉超声检查和血常规检查,获得颈动脉超声定量参数,计算MPV/PC比值、NLR。出院后90 d采用改良Rankin量表（mRS）评估患者预后,将患者分为预后不良组和预后良好组。受试者工作特征（ROC）曲线分析颈动脉超声定量参数、MPV/PC比值、NLR联合预测AIS患者预后不良的价值。结果：预后不良组动脉内膜中层厚度（IMT）、舒张末期血流速度（EDV）、MPV/PC比值、NLR大于预后良好组（P＜0.05）,收缩期峰值血流速度（PSV）小于预后良好组（P＜0.05）。IMT、PSV、EDV、MPV/PC比值、NLR预测AIS患者预后不良的曲线下面积分别为0.751、0.710、0.693、0.769、0.771,联合IMT、PSV、EDV、MPV/PC比值、NLR预测AIS患者预后不良的曲线下面积为0.883,高于单独指标预测。结论：颈动脉超声定量参数联合MPV/PC比值、NLR在AIS患者预后不良评估中具有较高的预测价值。     

PLT,MPV,PDW对单采血小板产品聚集的影响

目的：探讨血小板含量（PLT）,血小板平均分布宽度（PDW）,血小板平均体积（MPV）对单采血小板聚集的影响,方法：随机抽取68例血小板捐献者,均成功捐献单采血小板,分为聚集组和对照组。献血前抽取静脉血,采用麦道尼克CA620血细胞分析仪进行血细胞分析,检测PLT,MPV,PDW。结果：聚集组（%）PDW 17.5±1.8,高于对照组（%）PDW12.1±0.9（P〈0.05）。聚集组（fl）MPV 11.0±0.9高于对照组（fl）MPV 7.8±0.8（P〈0.05）,差异有统计学意义,聚集组PLT（187±13.3）×109,对照组PLT（195±11.0）×109,二者无明显统计学差异（P〉0.05）。MPV,PDW分别与PLT进行相关性分析,PLT与MPV无显著相关（r=0.132,P〉0.05）;PLT与PDW无显著相关（r=0.147,P〉0.05）。结论：单采血小板产品出现聚集,其捐献者PDW,MPV高于单采产品正常捐献者,与献血者PLT计数无明显关系。     

急性心理应激下血小板活化参数的变化及其机制探讨

目的:探讨急性心理应激下健康人群血小板活化参数的变化及其与性别、年龄的相关性,并分析其可能的机制。方法:检测54名健康被试者急性心理应激前后的血小板四项变化,包括血小板计数(PLT)、血小板平均体积(MPV)、血小板分布宽度(PDW)和大血小板比率(P-LCR)。随后,将被试者分成男、女性组或中、老年组,对其血小板四项结果进行组内及组间比较。结果:急性心理应激可导致健康人群中MPV、PDW和P-LCR的显著增加(P0.05),但年龄分组或性别分组组间均未见显著差异(P0.05)。结论:实验性急性心理应激可导致健康人群血小板活化指标MPV、PDW和P-LCR的显著增加,但与年龄和性别无关。     

外周血嗜酸性粒细胞比率及血小板参数与支气管哮喘相关性研究

摘要 目的：探索外周血嗜酸性粒细胞比率、血小板平均体积（MPV）、血小板平均宽度（PDW）、大型血小板比率（P-LCT）与重度哮喘患者肺功能及哮喘发作的关系。方法：回顾2017年1月至2018年12月于我院就诊,首次经肺功能检查,诊断为支气管哮喘患者 122例,其中重度患者(SAG) 56例;轻中度患者(n-SAG) 66例。选择同期在我院行健康体检志愿者(CP)的 37名,作为对照组。通过医院HIS系统调取研究对象的年龄、性别,BMI指数等一般资料,调取WBC、EOS%、PLT、PDW、MPV、P-LCT等血液结果,调取FVC ^pre 、FEV1 ^pre 、FVC%、FEV1%、FVC ^post 、FEV1 ^post 等肺功能检查结果。采用单因素方差分析、Pearson相关分析、Logistic 回归分析等方法对相关指标进行统计分析。结果：正常组的PDW、MPV、P-LCT水平均低于重症哮喘组,具有统计学意义（均P <0.05）, 正常组的EOS%水平明显低于重症哮喘组,具有显著统计学意义（P <0.01）,重症哮喘患者FVC ^pre 、FEV1 ^pre 、FVC%、FEV1%、FVC ^post 、FEV1 ^post 均显著低于非重症患者及观察组,具有显著统计学意义（均P <0.01）。Pearson相关性分析显示,EOS%与FEV1改善量具有相关性（r=0.233,P=0.003）。PDW、MPV、P-LCT与FVC改善量均具有显著相关性（均P<0.01）, PDW、MPV、P-LCT与FVC变异率、FEV1变异率具有相关性(均P<0.05)。嗜酸性粒细胞与血小板比率（EPR）与FEV1改善量具有相关性（r=0.159,P=0.048）logistic回归分析显示：EOS（Exp（B）=1.203）、P-LCT（Exp（B）=1.086）与哮喘发作密切相关。结论：外周血EOS%、PDW、MPV和P-LCT水平与哮喘肺功能具有密切相关性,在判断哮喘发作风险及哮喘发作严重程度反面具有一定参考作用。     

NLR、MPVLR、MPV在全膝关节置换术后急性下肢深静脉血栓形成诊断中的影响价值

摘要 目的：分析全膝关节置换术后急性下肢深静脉血栓（DVT）形成中NLR、MPVLR、MPV的临床诊断价值。方法：于本院2020年10月-2021年10月接受全膝关节置换术患者中筛选80例开展研究,纳入对象接受手术治疗后3到5日内接受彩色超声下肢DVT检查,依据检查证实是否发生下肢DVT作为分组标准,将结果证实发生下肢DVT患者43例纳入观察组,未发生的37例纳入对照组。两组同时接受血常规检查,汇总平均血小板体积（MPV）、淋巴细胞计数、中性粒细胞,并依据结果计算中性粒细胞/淋巴细胞计数（NLR）,平均血小板体积/淋巴细胞计数（MPVLR）,对患者临床资料展开回顾性分析,判断发生/未发生组别患者各项指标从差异,进而评价MPV、NLR、MPVLR对术后急性下肢DVT形成诊断的诊断价值。结果：发生下肢DVT与未发生下肢DVT患者,在性别、年龄、慢性病史（高血压、糖尿病）、吸烟史、体质量指数等方面,未见明显差异（P>0.05）。和未发生下肢DVT患者相比,发生下肢DVT患者中心粒细胞相对较低,淋巴细胞和血小板计数相对加高（P<0.05）。两组在白细胞上差异不大（P>0.05）。发生下肢DVT患者MPV、NLR、MPVLR明显高于未发生手术患者（P<0.05）;肿胀天数在7天及以上、高于7天患者在NLR指标上差异不大（P＞0.05）,而在MPVLR上组间有统计学差异（P<0.05）。结论：MPV、NLR、MPVLR指标对于判断全膝关节置换术治疗后判断是否发生急性下肢DVT具有较高诊断价值,其中MPVLR可作为下肢DVT早期诊断典型指标,为临床提供疾病判断依据,值得重视。