Assessment of atherosclerotic risk factors and endothelial function in children and young adults with pediatric‐onset systemic lupus erythematosus

Objective

To characterize atherosclerotic risk factors and endothelial function in pediatric‐onset systemic lupus erythematosus (SLE).

Methods

Lipoproteins, oxidized state, and autoantibodies to oxidized low‐density lipoprotein (Ox‐LDL) were assessed. Endothelial function was evaluated using brachial artery reactivity.

Results

Thirty‐three SLE patients and 30 controls were studied. SLE subjects had significantly decreased mean high‐density lipoprotein (HDL) cholesterol (41 mg/dl versus 51 mg/dl; P = 0.002) and apolipoprotein A‐I (97 mg/dl versus 199 mg/dl; P = 0.0004). There was no difference between groups in markers of oxidized state (including nitric oxide metabolites, isoprostanes, and Ox‐LDL) or in endothelial function. However, SLE subjects had increased median anti‐Ox‐LDL IgG (2,480 relative light units [RLU] versus 1,567 RLU; P = 0.0007) and IgG immune complexes with LDL (4,222 RLU versus 2,868 RLU; P = 0.002).

Conclusion

Pediatric SLE patients had significantly decreased levels of HDL cholesterol and apolipoprotein A‐I and elevated titers of autoantibodies to Ox‐LDL. Despite these atherosclerotic risk factors, SLE patients had normal measures of oxidized state and endothelial function.

     

硫酸乙酰肝素蛋白聚糖及肝素对巨噬细胞脂质蓄积的抑制作用

用苏丹Ⅳ染色观察巨噬细胞内脂质聚积的变化；通过酶－荧光法检测巨噬细胞内胆固醇含量并检测125Ⅰ标记氧化型低密度脂蛋白降解量来反映巨噬细胞清道夫受体的活性，以探讨硫酸乙酸肝素蛋白聚糖及肝素对巨噬细胞脂质蓄积的影响及机制。结果发现，氧化型低密度脂蛋白（100mg／L）组巨噬细胞的胞浆内可见较多苏丹Ⅳ着色红染颗粒，氧化型低密度脂蛋白（100mg／L）十硫酸乙酰肝素蛋白聚糖（15．5mg／L）组0及氧化型低密度脂蛋白（100mg／L）十肝素（200mg／L）组巨噬细胞内红色颗粒明显少于氧化型低密度脂蛋白组；氧化型低密度脂蛋白十硫酸乙酰肝素蛋白聚糖组及氧化型低密度脂蛋白十肝素组巨噬细胞内总胆固醇和胆固醇酯的含量明显低于氧化型低密度脂蛋白组（P＜0．05，P＜0．01）；硫酸乙酰肝素蛋白聚糖组及肝素组125Ⅰ标记的氧化型低密度脂蛋白降解量均低于对照组。结果提示，硫酸乙酰肝素蛋白聚糖和肝素可能是通过下调清道夫受体活性减少了巨噬细胞对氧化型低密度脂蛋白的摄取而抑制脂质在巨噬细胞内的聚集和泡沫细胞的形成。     

氧化低密度脂蛋白与内皮素在促进血管平滑肌细胞增生中的内在联系

本实验用培养的家兔血管平滑肌细胞探讨了在促进细胞增生过程中,氧化低密度脂蛋白(oxidizedlowdensitylipoprotein,OLDL)和内皮素之间的联系,发现二者都可刺激血管平滑肌细胞增生,内皮素A受体拮抗剂BQ123可显著抑印制OLDL的促细胞增生作用,￣3H-TdR的掺入量较单纯OLDL组减少13.3%;细胞培养液内皮素放射免疫测定表明,应用BQ123能使内皮素释放量较单纯OLDL组降低28.9%。免疫细胞化学检测结果亦与上述完全符合,提示在动脉粥样硬化发生中,OLDL促血管平滑肌细胞增生的作用可能部分是通过内皮素来实现的。     

Impact of the off-clamp endoscopic robot-assisted simple enucleation (ERASE) of clinical T1 renal tumors on the postoperative renal function: Results from a matched-pair comparison

Purpose

To evaluate the surgical and functional outcomes of a matched-paired series of on-clamp vs off-clamp endoscopic robot-assisted simple enucleation (ERASE) and standardized renorraphy in a tertiary referral institution, to search for predictors of functional drop after surgery and to investigate the influence of off-clamp technique in patients presenting these characteristics.

动脉粥样硬化的表观遗传学研究进展

动脉粥样硬化是环境因素与遗传因素相互作用所致的慢性炎症疾病.表观遗传修饰可能是链接环境因素与遗传因素的桥梁,深入了解表观遗传修饰如DNA甲基化、组蛋白修饰以及微小RNA对动脉粥样硬化形成和发展的影响及其作用机制,将进一步阐明动脉粥样硬化的发病机制.并且由于表观遗传修饰可逆,这可能为动脉粥样硬化的治疗提供新的策略和靶点.