目的探讨中性粒细胞/淋巴细胞比值(NLR)与2型糖尿病(T2DM)患者肾小管损伤的关系。方法选取T2DM患者258例,测定中性粒细胞、淋巴细胞绝对值,计算NLR;采用免疫透射比浊法测定24 h尿微量白蛋白(24 h UMA);测定肾小管标志物β2-微球蛋白(β2...目的探讨中性粒细胞/淋巴细胞比值(NLR)与2型糖尿病(T2DM)患者肾小管损伤的关系。方法选取T2DM患者258例,测定中性粒细胞、淋巴细胞绝对值,计算NLR;采用免疫透射比浊法测定24 h尿微量白蛋白(24 h UMA);测定肾小管标志物β2-微球蛋白(β2-MG)、β-半乳糖苷酶(GAL)、视黄醇结合蛋白(RBP)、N-乙酰-β-D-葡萄糖苷酶(NAG),以上4种标志物均正常者视为肾小管功能正常,任意1种或以上标志物超过上限视为肾小管功能受损。根据肾小管功能是否受损将患者分为正常组142例,受损组116例,比较2组间NLR水平差异。根据存在任意1种、2种、3种肾小管标志物异常将肾小管功能受损组进行分组,比较各亚组间NLR水平差异。另外,分析NLR与β2-MG、GAL、RBP、NAG的相关性。采用二分类Logistic回归分析T2DM患者肾小管损伤的影响因素。结果受损组NLR水平高于正常组(P<0.05)。随着肾小管标志物异常种类增多、肾小管损伤程度加重,NLR水平逐渐升高(P<0.05)。NLR与β2-MG、GAL、RBP、24 h UMA具有正相关性(r分别为0.191、0.152、0.131及0.158,P<0.05)。Logistic回归分析结果显示,较高水平NLR、24 h UMA是T2DM患者肾小管损伤的危险因素,而较高水平的HDL-C为其保护因素。结论NLR与T2DM患者肾小管损伤关系密切,可以反映肾小管损伤程度。展开更多
目的:探讨慢性肾衰竭患者尿乙酰氨基葡萄糖苷酶(N-acetylβ--D-glucosam in idase,NAG)活性变化及其在慢性肾衰竭进展过程中的意义。方法:用光电比色法测定87例慢性肾衰竭患者尿NAG的活性,并根据其肾脏病变是否稳定以及是否合并高血压...目的:探讨慢性肾衰竭患者尿乙酰氨基葡萄糖苷酶(N-acetylβ--D-glucosam in idase,NAG)活性变化及其在慢性肾衰竭进展过程中的意义。方法:用光电比色法测定87例慢性肾衰竭患者尿NAG的活性,并根据其肾脏病变是否稳定以及是否合并高血压将患者分为肾脏病变稳定组、肾脏病变活动组、高血压组和非高血压组,分别比较尿NAG的活性。同期选择30名健康人作为对照组。结果:慢性肾衰竭尿NAG活性显著高于对照组(P<0.01),肾脏病变活动组尿NAG活性显著高于肾脏病变稳定组(P<0.01),高血压组尿NAG活性显著高于非高血压组(P<0.01)。结论:慢性肾衰竭病程中,肾脏病变活动和高血压可能是加重肾小管-间质损伤的重要因素。展开更多
39例肾脏病患儿及195例正常儿童尿NAG与尿γ-GT活性测定结果表明:20例急性肾炎中有9例尿 NAG 升高,8例γ-GT 升高。9例肾病综合征患儿,不论初发或复发,全部尿 NAG 明显增高,8例γ-GT 增高。这两种肾脏病尿 NAG相比差异有显著性。作者认...39例肾脏病患儿及195例正常儿童尿NAG与尿γ-GT活性测定结果表明:20例急性肾炎中有9例尿 NAG 升高,8例γ-GT 升高。9例肾病综合征患儿,不论初发或复发,全部尿 NAG 明显增高,8例γ-GT 增高。这两种肾脏病尿 NAG相比差异有显著性。作者认为:尿 NAG 及尿γ—GT 能较灵敏地反映原发性和继发性肾脏疾患及其损害程度。动态观察对于估计病情、评价疗效及预后有一定价值。且以尿 NAG 更敏感。展开更多
β-N-acetylglucosaminidases are crucial enzymes involved in chitin degrada- tion in insects. We identified a β-N-acetylglucosaminidase gene （LmNAG1） from Locusta migratoria. The full-length complementary DNA （cDNA...β-N-acetylglucosaminidases are crucial enzymes involved in chitin degrada- tion in insects. We identified a β-N-acetylglucosaminidase gene （LmNAG1） from Locusta migratoria. The full-length complementary DNA （cDNA） of LmNAG1 consists of 2 667 nucleotides, including an open reading frame （ORF） of 1 845 nucleotides encoding 614 amino acid residues, and 233- and 589-nucleotide non-coding regions at the 5＇- and 3＇- ends, respectively. Phylogenetic analysis grouped the cDNA-deduced LmNAG1 protein with the enzymatically characterized β-N-acetylglucosaminidases in group I. Analyses of stage- and tissue-dependent expression patterns of LmNAG1 were carried out by real- time quantitative polymerase chain reaction. Our results showed that LmNAG1 transcript level in the integument was significantly high in the last 2 days of the fourth and fifth instar nymphs. LmNAG1 was highly expressed in foregut and hindgut. RNA interference of LmNAG1 resulted in an effective silence of the gene and a significantly reduced total LmNAG enzyme activity at 48 and 72 h after the injection of LmNAG1 double-stranded RNA （dsRNA）. As compared with the control nymphs injected with GFP dsRNA, 50% of the dsLmNAGl-injected nymphs were not able to molt successfully and eventually died. Our results suggest that LmNAG1 plays an essential role in molting process ofL. migratoria.展开更多
文摘目的探讨中性粒细胞/淋巴细胞比值(NLR)与2型糖尿病(T2DM)患者肾小管损伤的关系。方法选取T2DM患者258例,测定中性粒细胞、淋巴细胞绝对值,计算NLR;采用免疫透射比浊法测定24 h尿微量白蛋白(24 h UMA);测定肾小管标志物β2-微球蛋白(β2-MG)、β-半乳糖苷酶(GAL)、视黄醇结合蛋白(RBP)、N-乙酰-β-D-葡萄糖苷酶(NAG),以上4种标志物均正常者视为肾小管功能正常,任意1种或以上标志物超过上限视为肾小管功能受损。根据肾小管功能是否受损将患者分为正常组142例,受损组116例,比较2组间NLR水平差异。根据存在任意1种、2种、3种肾小管标志物异常将肾小管功能受损组进行分组,比较各亚组间NLR水平差异。另外,分析NLR与β2-MG、GAL、RBP、NAG的相关性。采用二分类Logistic回归分析T2DM患者肾小管损伤的影响因素。结果受损组NLR水平高于正常组(P<0.05)。随着肾小管标志物异常种类增多、肾小管损伤程度加重,NLR水平逐渐升高(P<0.05)。NLR与β2-MG、GAL、RBP、24 h UMA具有正相关性(r分别为0.191、0.152、0.131及0.158,P<0.05)。Logistic回归分析结果显示,较高水平NLR、24 h UMA是T2DM患者肾小管损伤的危险因素,而较高水平的HDL-C为其保护因素。结论NLR与T2DM患者肾小管损伤关系密切,可以反映肾小管损伤程度。
文摘目的:探讨慢性肾衰竭患者尿乙酰氨基葡萄糖苷酶(N-acetylβ--D-glucosam in idase,NAG)活性变化及其在慢性肾衰竭进展过程中的意义。方法:用光电比色法测定87例慢性肾衰竭患者尿NAG的活性,并根据其肾脏病变是否稳定以及是否合并高血压将患者分为肾脏病变稳定组、肾脏病变活动组、高血压组和非高血压组,分别比较尿NAG的活性。同期选择30名健康人作为对照组。结果:慢性肾衰竭尿NAG活性显著高于对照组(P<0.01),肾脏病变活动组尿NAG活性显著高于肾脏病变稳定组(P<0.01),高血压组尿NAG活性显著高于非高血压组(P<0.01)。结论:慢性肾衰竭病程中,肾脏病变活动和高血压可能是加重肾小管-间质损伤的重要因素。
文摘39例肾脏病患儿及195例正常儿童尿NAG与尿γ-GT活性测定结果表明:20例急性肾炎中有9例尿 NAG 升高,8例γ-GT 升高。9例肾病综合征患儿,不论初发或复发,全部尿 NAG 明显增高,8例γ-GT 增高。这两种肾脏病尿 NAG相比差异有显著性。作者认为:尿 NAG 及尿γ—GT 能较灵敏地反映原发性和继发性肾脏疾患及其损害程度。动态观察对于估计病情、评价疗效及预后有一定价值。且以尿 NAG 更敏感。
文摘β-N-acetylglucosaminidases are crucial enzymes involved in chitin degrada- tion in insects. We identified a β-N-acetylglucosaminidase gene （LmNAG1） from Locusta migratoria. The full-length complementary DNA （cDNA） of LmNAG1 consists of 2 667 nucleotides, including an open reading frame （ORF） of 1 845 nucleotides encoding 614 amino acid residues, and 233- and 589-nucleotide non-coding regions at the 5＇- and 3＇- ends, respectively. Phylogenetic analysis grouped the cDNA-deduced LmNAG1 protein with the enzymatically characterized β-N-acetylglucosaminidases in group I. Analyses of stage- and tissue-dependent expression patterns of LmNAG1 were carried out by real- time quantitative polymerase chain reaction. Our results showed that LmNAG1 transcript level in the integument was significantly high in the last 2 days of the fourth and fifth instar nymphs. LmNAG1 was highly expressed in foregut and hindgut. RNA interference of LmNAG1 resulted in an effective silence of the gene and a significantly reduced total LmNAG enzyme activity at 48 and 72 h after the injection of LmNAG1 double-stranded RNA （dsRNA）. As compared with the control nymphs injected with GFP dsRNA, 50% of the dsLmNAGl-injected nymphs were not able to molt successfully and eventually died. Our results suggest that LmNAG1 plays an essential role in molting process ofL. migratoria.
