胰岛素对脂多糖诱导急性肾损伤的治疗效应及其机制

来源 :庆祝中国当代儿科杂志创刊15周年大会暨当代儿科论坛 | 被引量 : 0次 | 上传用户:keenkingzhu
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
  目的 观察外源性胰岛素对脂多糖(LPS)诱导的急性肾损伤(AKI)大鼠血、尿和肾组织中性粒细胞明胶酶相关脂质运载蛋白(NGAL)、基质金属蛋白酶9(MMP-9)表达的影响,探讨胰岛素对AKI的治疗效应及其机制.方法 将72只健康SD雄性大鼠随机分为9组:正常对照组,模型组(分别为2h、6h、12 h、24 h组),治疗组(分别为2h、6h、12 h、24 h组),每组8只.予尾静脉注射4 mg/kg LPS建立AKI模型,治疗组则在建模前2h腹腔皮下注射4 U/kg中效胰岛素,空白对照组和模型组则相应给予等量生理盐水.采集各组各时相点大鼠血、尿和肾组织标本.分别检测血清NGAL、MMP-9及C肽(ELISA法),检测血糖(快速血糖仪)、肌酐(Cr)浓度;检测和计算尿NGAL/Cr、MMP-9/Cr、β2微球蛋白(β2-MG)/Cr(ELISA法);观察肾组织病理改变,以及测定肾组织NGAL和MMP-9表达水平(免疫组织化学染色方法)及肾组织匀浆肿瘤坏死因子α(TNF-α)水平(ELISA法).结果 ①与正常对照组相比,模型组2h、6h、12 h、24h血、尿和肾组织NGAL表达水平均显著上升(P <0.01);且尿NGAL/Cr、肾组织NGAL表达与肾组织损伤程度呈显著正相关(r =0.949、r=0.946,P<0.01).②与正常对照组相比,模型组6h、12 h、24h血、尿和肾组织MMP-9水平显著上升(P<0.01);肾组织MMP-9表达与肾组织损伤程度呈显著正相关(r+0.852,P<0.01).(③)模型组较正常对照组血清Cr差异无统计学意义(P>0.05),治疗组较模型组血清Cr亦无统计学差异(P>0.05);与正常对照组比较,模型组12 h、24h尿 β2-MG/Cr显著升高(分别为0.01<P<0.05、P<0.01);与模型组比较,治疗组于24h尿β2-MG/Cr显著升高(0.01 <P <0.05).④与模型组相比,治疗组各组血、尿和肾组织NGAL、MMP-9表达水平均显著降低(P<0.05),且NGAL下降程度比MMP-9下降更为明显.⑤与正常对照组相比,模型组2h、6h、12h、24 h肾组织TNF-α水平均显著上升(P<0.01);较之模型组,治疗组各组肾组织TNF-α水平均显著降低(P<0.05).⑥模型组血糖均比正常对照组明显增高(P<0.01);治疗组血糖基本维持在正常范围,6h、12 h血糖明显低于模型组(P<0.05).⑦与正常对照组相比,模型组2h、6h、12 h、24 h血清C肽值均显著升高(P<0.01);较之模型组,治疗组6h、12 h、24 h血清C肽值均明显减低(P<0.01).⑧血清NGAL与血清C肽、血糖呈正相关(r=0.797,P<0.05、r=0.695,P<0.05),与肾组织TNF-α呈正相关(r =0.853,P<0.05).结论 ①LPS通过上调NGAL、MMP-9和TNF-α表达、诱导高血糖和胰岛素抵抗导致AKI的发生.②AKI时,血、尿、肾组织中NGAL均明显升高;其中,尿NGAL水平与肾组织NGAL、MMP-9表达、肾小管间质损伤程度呈正相关,提示测定尿NGAL水平对于AKI的早期诊断、病情程度判断和疾病转归有重要意义.③胰岛素治疗可能通过下调NGAL和MMP-9表达、以及针对胰岛素抵抗并降低血糖,减轻LPS诱导的AKI.
其他文献
BACKGROUND: Experimental data suggest that use of cryoablation in pulmonary vein isolation (PVI) is associated with less cell damage and less thrombus formation compared to radiofrequency (RF) energy.
Surgery, including Mohs technique, is regarded the reference modality for the treatment of most basal cell carcinomas (BCCs).Yet surgical treatment in challenging cases (large, multiple, confluent or
会议
Thermal ablation to destroy tumor tissue may help activate tumor-specific T cells by elevating the presentation of tumor antigens to the immune system.However, the antitumor activity of these r cells
会议
Purpose: To review the safety and efficacy of cryoablation of recurrent sacrococcygeal tumors.Materials and Methods: The radiology departmental ablation database was retrospectively searched for cases
会议
Background: In low-resource settings, cryotherapy can be cost-effective, affordable, and a first-line treatment for cervical intraepithelial neplasia (CIN) of any grade.Objectives: To report the accep
Background and Objective: Malignant degeneration of pilonidal sinuses of the sacrococcygeal region is rare but quite serious, as the tumor soon perforates the sacral fascia and becomes adherent to the
Malignant ascites presents a considerable clinical challenge to the management of ovarian cancer, but also provides a wealth of opportunities for translational research.The accessibility of ascitic fl
会议
Background: Surgical extirpation of neuroendocrine neoplasms hepatic metastases (NENHM) provides the best opportunity of longterm survival but is not feasible in the majority of patients given the wid
全球5岁以下儿童死亡统计784,000 deaths of children < 5 in China 2000,Lancet 2003;.361: 2226-34 Black急性下呼吸道感染·最主要的儿科致死原因:全球每年190万儿童死于ALRI,发展中国家尤显.Williams,B.G.,2002.Lancet Ianfet Dis 2:25-32·中国5岁以下儿童死亡人数约为78万,其中10
会议
E.D.Thomas:造血干细胞移植之父(1958-212)Stem Cell Transplant Course Conditioning:Cytotoxic medicine--Myeloablative HVD Ggraft rejection Patients T-cells Reduced intensive conditioning Donors T-cells Conditionin
会议