Association between polymorphisms in the promoter region of miR‐17‐92 cluster and systemic lupus erythematosus in a Chinese population

The aim of this study was to investigate the association of genetic polymorphisms in the promoter region of miR‐17‐92 with systemic lupus erythematosus (SLE). The gene polymorphism was analysed using SNaPshot in 312 SLE patients and 396 controls. Relative expression of miR‐17‐92 was measured by quantitative real‐time PCR. Association was found between rs9515692 and a decreased risk of SLE (CT vs CC: OR = 0.65, 95%CI, 0.46‐0.92, P = .014; CT+TT vs CC: OR = 0.64, 95%CI, 0.46‐0.90, P = .009; T vs C: OR = 0.69, 95%CI, 0.52‐0.92, P = .010, respectively). Haplotype analysis showed that C‐G‐G, C‐A‐A haplotypes were associated with an increased SLE risk (OR=4.46, 95%CI, 2.17‐9.17, P < 0.001; OR=2.33, 95%CI, 1.44‐3.76, P < 0.001, respectively). T allele and CT+TT genotypes in rs9515692 were associated with decreased risk of anti‐dsDNA in SLE (CT+TT vs CC: OR = 0.42, 95%CI = 0.24‐0.72, P = .002; T vs A: OR = 0.49, 95%CI = 0.31‐0.79, P = .003). Moreover, rs9515692 CT+TT genotypes had a higher level of miR‐17 as compared to CC genotype (P = .017). These findings suggest that the rs9515692 CT+TT genotypes were a protective factor for the susceptibility of SLE, probably by increasing the expression of miR‐17.     

单侧与双侧穿刺入路PKP术对骨质疏松性胸腰椎压缩骨折患者手术效果、生活质量以及血清应激因子的影响

目的:探讨单侧与双侧穿刺入路经皮椎体后凸成形术(PKP)对骨质疏松性胸腰椎压缩骨折(OVCF)患者手术效果、生活质量以及血清应激因子的影响。方法:回顾性选取2016年7月～2019年7月期间我院接收的行PKP的OVCF患者83例。根据入路方式的不同分为A组(n=41,单侧穿刺入路)和B组(n=42,双侧穿刺入路),对比两组患者围术期指标、影像学指标、视觉模拟评分法(VAS)评分、Oswestry腰椎功能障碍指数(ODI)评分、健康调查生活质量量表(SF-36)评分、血清应激因子以及并发症发生情况。结果:A组手术时间短于B组,骨水泥用量、术中透视次数少于B组(P0.05)。两组术后6个月VAS评分、ODI评分降低,SF-36评分升高(P0.05)。两组术后3d去甲肾上腺素(NE)、肾上腺素(E)、皮质醇(Cor)均升高,但A组低于B组(P0.05)。两组术后6个月椎体前缘高度、后凸Cobb角均升高(P0.05)。两组并发症发生率比较差异无统计学意义(P0.05)。结论:单侧穿刺入路PKP可获得与双侧穿刺入路PKP相当的治疗效果和安全性,同时可缩短手术时间,减少骨水泥用量及术中透视次数,减轻机体应激反应。     

Global human genetics of HIV-1 infection and China

Genetic polymorphisms in human genes can influence the risk for HIV-1 infection and disease progression, although the reported effects of these alleles have been inconsistent. This review highlights the recent discoveries on global and Chinese genetic polymorphisms and their association with HIV-1 transmission and disease progression.     

Carbachol increases Na+-HCO3- cotransport activity in murine colonic crypts in a M3-, Ca2+/calmodulin-, and PKC-dependent manner

The Na(+)-HCO(3)(-) cotransporter (NBC) mediates HCO(3)(-) import into the colonocyte via its pNBC1 isoform. Whereas renal kNBC1 is inhibited by increased cAMP levels, pNBC1 is stimulated. Cholinergic stimulation activates renal NBC, but the effect on intestinal NBC is unknown. Therefore, crypts were isolated from the murine proximal colon by Ca(2+) chelation and loaded with the pH-sensitive dye 2',7'-bis-carboxyethyl-5,6-carboxyfluorescein. Na(+)-HCO(3)(-) cotransport activity was calculated from the dimethylamiloride-insensitive (500 microM) intracellular pH recovery from an acid load in the presence of CO(2)-HCO(3)(-) and the intracellular buffering capacity. Carbachol strongly increased Na(+)-HCO(3)(-) cotransport activity compared with control rates. Ca(2+) chelation with BAPTA-AM, blockade of the M(3) subtype of muscarinergic receptors with 4-diphenylacetoxy-N-methylpiperidine methiodide, and inhibition of Ca(2+)/calmodulin kinase II with KN-62 all caused significant inhibition of the carbachol-induced NBC activity increase. Furthermore, PKC inhibition with G?-6976 and G?-6850 significantly reduced the carbachol effect, which may be related to the unique NH(2)-terminal consensus site for PKC-dependent phosphorylation of pNBC1. We conclude that NBC in the murine colon is thus activated by carbachol, consistent with its presumed function as an anion uptake pathway during intestinal anion secretion, but that the signal transductions pathways are distinct from those involved in the cholinergic activation of renal NBC1.     

中国北方凿姬蜂属(凿姬蜂亚属)的研究(膜翅目:姬蜂科)(英文)

本文报道在我国北方地区发现的凿姬蜂属（凿姬蜂亚属）的种类,共9种,其中3新种：叉凿姬蜂Xorides（X．）furcatussp．nov,采自河南省渑池县;毛凿姬蜂X．（X．）hirtussp．nov,采自辽宁省新宾县;棘凿姬蜂X．（X．）aculeatussp．nov,采自辽宁省新宾县;3中国新记录种：短唇凿姬蜂X．（X）brachylabis（Kriechbaumer1889）、前凿姬蜂X．（X．）praecatorius（Fabricus1973）、隐凿姬蜂X．（X．）sepulchralis（Holmgren1860）;3中国已知种：举凿姬蜂X．（X）erigentisWangetGupta1995,兴安凿姬蜂X．（X．）hingganensisWangetGupta1995,北海道凿姬蜂X．（X．）sapporensis（Uchida1928）。已知的寄主全部为枯木蛀虫。标本保存在林业部森林病虫害防治总站。     

荒漠土壤中两株抗氧化细菌的抗氧化生理生化特征

【背景】微生物在荒漠生态系统中经常面临多重胁迫,包括干旱、高温、UV辐射,这些环境胁迫使得荒漠土壤微生物极易在体内外积累大量的超氧离子或过氧化物,抑制其生长或者直接造成死亡。【目的】荒漠土壤细菌为适应荒漠环境表现出抗氧化特性,作为荒漠生态系统重要组成部分,对其抗氧化特性的研究为荒漠地区抗氧化资源的开发提供科学依据和技术基础,也对荒漠微生物抗氧化机制的挖掘奠定了基础。【方法】利用过氧化氢氧化筛选出两株具有强抗氧化性的荒漠土壤细菌:海床动性微菌AX6(PlanomicrobiumokeanokoitesAX6)和海洋考克氏菌KD4(Kocuriamarina KD4),通过测定其在过氧化氢条件下的生长曲线、细胞受损程度、抗氧化酶活性以及自由基清除能力,探究荒漠土壤微生物的抗氧化生理生化特征。【结果】两株细菌在低浓度过氧化氢中细胞丙二醛含量显著低于阴性对照大肠杆菌,在1.5mmol/L过氧化氢中菌株AX6的谷胱甘肽过氧化物酶活性可达108.33 U/mL,同时DPPH、超氧阴离子自由基的清除能力显著升高;此外,在3 mmol/L过氧化氢中菌株KD4的过氧化氢酶活性升高至1.16 U/mL,显...     

联合国教科文组织生命科学伦理学项目实施与法医专业本科生素质教育与专业外语教学创新实践的教学研究

如何最大程度地发挥学校的教学潜能和优势,选择最为有效的教学方法来提高法医专业本科学生的素质能力和专业外语水平,已经成为新形势下高校教学改革的重要内容.本文结合笔者工作实际,讨论开展联合国教科文组织生命科学伦理学项目实施与法医专业本科学生素质教育与专业外语教学创新实践教学研究的相关问题.     

The PhysioFlow Thoracic Impedancemeter Is Not Valid for the Measurements of Cardiac Hemodynamic Parameters in Chronic Anemic Patients

The aim of the present study was to test the validity of the transthoracic electrical bioimpedance method PhysioFlow® to measure stroke volume in patients with chronic anemia. Stroke volume index (SVI), as well as cardiac index (CI) obtained by transthoracic electrical bioimpedance method and doppler echocardiography were compared in healthy subjects (n = 25) and patients with chronic anemia (i.e. mainly with sickle cell anemia; n = 32), at rest. While doppler echocardiography was able to detect difference in SVI between the two populations, the Physioflow® failed to detect any difference. Bland & Altman analyses have demonstrated no interchangeability between the two methods to assess CI and SVI in anemic patients and healthy subjects. While doppler echocardiography displayed a good concordance for SVI results with those obtained in the literature for anemic patients, the Physioflow® did not. Finally, in contrast to doppler echocardiography: 1) the CI obtained with the Physioflow® was not correlated with the hemoglobin level and 2) the stroke volume determined by the Physioflow® was highly influenced by body surface area. In conclusion, our findings indicate that the Physioflow® device is inaccurate for the measurement of SVI and CI in patients with chronic anemia and has a poor accuracy for the measurement of these parameters in African healthy subjects.