Hydrogen sulfide serves as a biomarker in the anterior segment of patients with diabetic retinopathy

International Ophthalmology - The present study aims to determine hydrogen sulfide (H2S) concentrations of the aqueous humor from patients with diabetic retinopathy (DR) to compare its levels in...     

圆锥角膜病因学研究进展——遗传、环境刺激、表观遗传的相互作用

圆锥角膜是一种扩张性角膜疾病,以角膜中央变薄、向前凸出呈锥状为特征,可严重影响视力。圆锥角膜病因复杂,迄今为止尚未完全明确,可能是遗传、表观遗传和环境刺激之间相互作用的结果。本文旨在对近年来圆锥角膜病因学的研究进展进行综述,并对未来该领域的研究方向进行展望:阐明表观遗传学的调控路径可能是明确病因的关键;3D培养的体外模型可望为探索圆锥角膜病因和推进治疗提供依据。     

A movable microelectrode array for chronic basal ganglia single-unit electrocorticogram co-recording in freely behaving rats

The basal ganglia–cortical circuits are important for information process to brain function. However, chronic recording of single-unit activities in the basal ganglia nucleus has not yet been well established. We present a movable bundled microwire array for chronic subthalamic nucleus (STN) single-unit electrocorticogram co-recording. The electrode assembly contains a screw-advanced microdrive and a microwire array. The array consists of a steel guide tube, five recording wires and one referenced wire which form the shape of a guiding hand, and one screw electrode for cortico-recording. The electrode can acquire stable cortex oscillation-driven STN firing units in rats under different behaving conditions for 8 weeks. We achieved satisfying signal-to-noise ratio, portions of cells retaining viability, and spike waveform similarities across the recording sections. Using this method, we investigated neural correlations of the basal ganglia–cortical circuits in different behaving conditions. This method will become a powerful tool for multi-region recording to study normal statements or movement disorders.     

Microsatellite markers development in the clam,Paphia amabilis (Philippi, 1847)

The clam Paphia amabilis is an important edible shellfish in southern China and Japan. Recently the natural populations of this species has significantly decreased due to the environmental changes and overfishing. To support the conservation and aquaculture of this species, we developed 12 microsatellite markers for the clam and characterized them in a wild population. These markers were polymorphic with the number of alleles per locus ranged from 2 to 9, the observed heterozygosity and expected heterozygosity ranged from 0.22 to 0.79 and from 0.33 to 0.87, respectively. Ten of the 12 markers conformed to Hardy–Weinberg equilibrium. This is the first set of microsatellites developed for P. amabilis and these markers will promote the genetic studies and species protection of this species.     

急性闭角型青光眼小梁切除术病人的护理

目的探讨提高急性闭角型青光眼行小梁切除术病人的护理效果。方法观察病人术后眼压、视野、视力、滤过泡,总结护理方法。结果35例病人经治疗眼压降至适于手术值,33例滤过性手术病人眼压恢复正常,追踪6个月以上30例出院后均能进行正确的自我眼球按摩,其中26例获理想滤泡,视力为0.3~1.0,眼压正常。结论小梁切除术配合术前、术后护理及健康宣教,病人恢复良好。     

左心房压和肺动脉楔压监测在心脏术后的应用

目的评价心脏直视术后合并肺动脉高压患者经颈内静脉安置左心房测压管和肺动脉漂浮导管对于成人心脏外科术后患者监护的可行性、安全性及准确性。方法前瞻性选择2010～2012年于武汉亚洲心脏病医院行心内直视手术的18岁以上患者100例,男43例、女57例,年龄46～65（47±16）岁。将患者分为两组：合并淤血性重度肺动脉高压患者行瓣膜置换术50例（A组）,合并淤血性轻中度肺动脉高压患者行瓣膜置换术50例（B组）。两组患者均经颈内静脉入路置入ARROW5Fr三腔导管,尖端经房间隔穿刺行持续左心房压（LAP）监测;同时经同侧颈内静脉安置ARROW 8Fr高流量鞘管放置肺动脉漂浮导管,入室即监测LAP和肺动脉楔压（PAWP）。观察两组患者中LAP和PAWP的相关性及准确性。结果两组患者均成功行持续LAP及PAWP监测,无严重导管相关并发症发生。A组和B组患者手术时间和体外循环时间差异无统计学意义（P〉0．05）,术后机械通气时间和ICU留置时间差异有统计学意义（P〈O．05）。A组患者平均肺动脉压（PAPMean）、平均左心房压（LAPmean）、平均肺动脉楔压（PAWPmean）、PAWP与LAP差值平均值（PAWP-LAPmean）均显著高于B组（P〈0．01）。两组患者中PAWP与LAP均具有良好相关性,A组患者相关性低于B组,差异有统计学意义（P〈0．01）。结论经颈内静脉入路行LAP监测及肺动脉漂浮导管监测是安全、可行的。PAWP不能准确反映左心室前负荷,在合并淤血性重度肺动脉高压的患者中使用LAP监测对于判断左心室前负荷更准确。     

PKCbeta regulates ischemia/reperfusion injury in the lung

Activation of PKCbetaII is associated with the response to ischemia/reperfusion (I/R), though its role, either pathogenic or protective, has not been determined. In a murine model of single-lung I/R, evidence linking PKCbeta to maladaptive responses is shown in the following studies. Homozygous PKCbeta-null mice and WT mice fed the PKCbeta inhibitor ruboxistaurin subjected to I/R displayed increased survival compared with controls. In PKCbeta-null mice, phosphorylation of extracellular signal-regulated protein kinase-1 and -2 (ERK1/2), JNK, and p38 MAPK was suppressed in I/R. Expression of the immediate early gene, early growth response-1 (Egr-1), and its downstream target genes was significantly increased in WT mice in I/R, particularly in mononuclear phagocytes (MPs), whereas this expression was attenuated in PKCbeta-null mice or WT mice fed ruboxistaurin. In vitro, hypoxia/reoxygenation-mediated induction of Egr-1 in MPs was suppressed by inhibition of PKCbeta, ERK1/2, and JNK, but not by inhibition of p38 MAPK. These findings elucidate key roles for PKCbetaII activation in I/R by coordinated activation of MAPKs (ERK1/2, JNK) and Egr-1.     

冠状切口治疗复杂面中部骨折的疗效探讨

目的:探讨冠状切口手术治疗在复杂面中部骨折的临床治疗优势。方法:对我科应用冠状切口治疗复杂面中部骨折的36例患者进行回顾研究,比较其与传统方法的优势。结果:术后6个月,手术切口大多数都已愈合,无血肿,基本上无感染。瘢痕不明显,面中部外形对称,没有出现面神经损伤症状,头皮切口处毛发大多正常生长。骨折复位状况愈合良好,咬合关系、开口度正常,患者较为满意。结论:冠状切口手术能够有效的防止并发症出现,充分暴露手术视野,切口隐蔽,瘢痕不明显,值得临床推广应用。