Persistence of functionally compromised anti-double-stranded DNA B cells in the periphery of non-autoimmune mice

Both anti-single-stranded (ss) and anti-double-stranded (ds) DNA antibodies are associated with the autoimmune disease systemic lupus erythematosus (SLE), but only anti-dsDNA antibodies are considered one of the diagnostic criteria. Using Ig transgenes coding for anti-DNA we have determined the fate of anti-dsDNA B cells in a non-autoimmune environment. In a Rag-2 wild-type background, B cells expressing the anti-dsDNA Ig transgenes are present in the spleen but dsDNA specificity is disrupted due to expression of endogenous L chains. In a Rag-2-deficient background where co-expression of endogenous Ig is blocked, splenic B cells expressing only the anti-dsDNA transgene Ig are present, indicating that endogenous Ig expression is not required for bone marrow export. The anti-dsDNA B cells that persist are profoundly crippled in that they are unable to proliferate to lipopolysaccharide or anti-Ig stimulation. Furthermore, these anti- dsDNA Ig transgene B cells show a decreased lifespan relative to non- transgene BALB/c B cells. Persistence of anti-dsDNA B cells in the periphery of non-autoimmune mice raises the possibility that their appearance in the context of SLE is due to their reactivation by T cell help.      

用激光衍射法测量网织红细胞膜剪切弱性模量(E)和表面粘度

按Bishop方法，在小鼠血液里诱导生成大量网织红细胞，然后提取网织红细胞。用激光衍射法测得小变形指数（DI）d和变形恢复过程（即松驰过程）中细胞变形恢复到最大值（DI）max半的时间t0.5（变形恢复半时间），将测得结果分别代入细胞膜的膜剪切弹性模量（E）公式和表面粘度（μm）公式，计算出网织红细胞和成熟红细胞膜的膜剪切弹性模量（E）和表面粘度（μm），并用荧光偏振法测量它们的膜流动性。发现网织红细胞与成熟红细胞的膜的剪切弹性模量（E）和表面粘度（μm）及膜的流动性有着明显的不同。这对研究由于贫血等原因造成的网织红细胞增多情况下，全血的微观流变特性有着重要的临床意义，对我们认识哺乳类网织红细胞的微观流变特性有重要理论意义及认识哺乳类动物网织红细胞向成熟红细胞转变的微观流变特性变化有着重要理论意义。     

Preliminary Evaluation of the Wound Healing Effect of Vitex Doniana Sweet (Verbenaceae) in Mice

Vitex doniana is traditionally used in Togo to treat various diseases including wounds. The aim of this work was to evaluate the efficiency of Vitex doniana on cutaneous wound healing. Wounds were induced in ICR mice divided into four groups as following: Group I received carbopol 974P NF empty gel, Groups II and III were treated topically with carbopol gel containing 2.5% and 5% of Vitex doniana extract. Group IV received Betadine® 10% as standard drug. The efficacy of treatment was evaluated by planimetry and histological analysis. We secondary used the gel containing Vitex doniana at 2.5% and the pure extract at 10 mg/ml on the model of ear edema induced by xylene. Skin toxicity test was performed with the gel containing Vitex doniana at 5% and the pure extract at 30 mg/ml. Vitex doniana at 5% and 2.5% provided better wound contraction (91.14% and 86.38%) at day 12 post-excision when compared to control (51.15%). The results of histological evaluation supported the outcome of excision wound model. Moreover Vitex doniana inhibited significantly edema induced by xylene when compared to control (p< 0.05). In skin toxicity test, no abnormal symptoms were developed over 14 day-time period. Vitex doniana inhibits the topical inflammation and accelerate cutaneous wound repair.     

中医药治疗痛风的研究进展

痛风是单钠尿酸盐沉积在关节所致的晶体相关性关节病,与嘌呤代谢紊乱和（或）尿酸排泄障碍所致的高尿酸血症直接相关,除关节损害,还可伴发肾脏病变及其他代谢综合征的表现,临床常见的代谢性风湿病。近年来关于中医药治疗痛风的研究越来越多,包括中药单体、单味药、中药复方和中医外治法,其具有疗效显著且无明显不良反应的优势。通过对痛风的病因病机、中医药治疗的基础研究和临床研究等方面进行全面综述,为临床治疗提供理论依据。     

白芍总苷治疗干燥综合征的研究进展

干燥综合征（SS）是一种慢性自身免疫性疾病,常侵犯泪腺、唾液腺等外分泌腺,同时还会造成肺、肾、消化和神经系统损害甚至累及全身器官。其病因复杂,发病机制目前尚未完全阐明。本病临床治疗为对症治疗,常用药物为免疫抑制剂,糖皮质激素等。白芍总苷辅助治疗本病可改善患者的外分泌腺功能,具有较好的临床疗效和安全性。本文从白芍总苷治疗SS的相关机制进行综述,以期为相关实验研究及临床提供更多的理论依据。     

机器人辅助腹腔镜下膀胱癌根治术后早期并发症及其危险因素

目的：探索机器人辅助腹腔镜下膀胱癌根治术后早期并发症发生的危险因素,为预防术后早期并发症提供参考。方法：选择2016年1月至2018年1月在中南大学湘雅二医院和湘雅三医院行机器人辅助腹腔镜下膀胱癌根治术(robot-assisted laparoscopic radical cystectomy,RARC)的膀胱癌患者90例,收集患者基本信息、术前检查及术后90 d内随访资料。对术后早期并发症的危险因素行单因素和多因素logistic回归分析。结果：术后总体并发症发生率为48.9%(44/90),其中Clavien分级1级9例,2级17例,3级4例,4级12例,5级2例。术后90 d内并发症以急性肾功能损伤(22.2%)、肠梗阻(16.7%)、尿路感染(14.4%)、淋巴漏(10.0%)最为常见。术后90 d内死亡2例(2.2%)。术前BMI(OR=1.16,95% CI：1.02~1.32)、术后30 min内血肌酐值(OR=1.02,95% CI：1.00~1.03)和pT分期(OR=1.67,95%CI：1.05~2.68)为RARC术后早期并发症的危险因素。结论：RARC术后早期并发症发生率较高,术前血液透析,纠正贫血,术中保护肾功能,快速康复治疗等有助于预防术后早期并发症的发生。