Using a novel small-angle X-ray scattering (SAXS) method for determination of fractional and subfractional composition of lipoproteins (LPs), a significant elevation of total cholesterol-lipop- roteins (C-LP) and, esp...Using a novel small-angle X-ray scattering (SAXS) method for determination of fractional and subfractional composition of lipoproteins (LPs), a significant elevation of total cholesterol-lipop- roteins (C-LP) and, especially, total triglyceride- lipoproteins (TG-LP), was shown in this work. Among the LP fractions, poloxamer 407 was shown to significantly increase proatherogenic total C-LDL, TG-LDL and, especially, their precursors C-VLDL and TG-VLDL, while only exhibiting a moderate increase in the antiatherogenic C-HDL and TG-HDL fractions. With regard to the VLDL subfractions, significant elevations were observed in both subfractions studied;namely, C-VLDL1-2 and C-VLDL3-5. Similar chang- es were noted in the TG-VLDL1-2 and TG- VLDL3-5 subfractions. The C-IDL and TG-IDL subfractions were increased significantly (?20- to 30- fold), while the C-LDL1-3 subfraction was moderately (?3- to 5-fold) increased at 48 hrs and at day 4. In the moderately elevated (?2- to 4-fold) anti-atherogenic HDL fraction, the C-HDL2 subfraction was increased more significantly (?4- fold) compared to the C-HDL3 subfraction;how- ever, both C-HDL subfractions returned to base- line by day 4. The elevation in the TG-HDL2 subfraction was observed only at 24 hrs. Mouse models of hyperlipidemia and atherosclerosis are useful to evaluate the role of “individual” LPs, as well as their fractions and subfractions, in hyperlipidemia and the genesis of atherosclerosis.展开更多
In pH 5.5 phosphate buffer solution, N-n-undecyl-N＇-（sodium-p-amino-benzenesulfonate） thiourea （UPT） produced a pair of redox peaks on the bare glassy carbon electrode. At the multi-walled carbon nanotube （MWNT...In pH 5.5 phosphate buffer solution, N-n-undecyl-N＇-（sodium-p-amino-benzenesulfonate） thiourea （UPT） produced a pair of redox peaks on the bare glassy carbon electrode. At the multi-walled carbon nanotube （MWNT） modified electrode, the electrochemical behavior of UPT enhanced greatly. In the presence of bovine serum albumin （BSA）, the peak currents of UPT decreased linearly due to the formation of a super-molecular complex. This method was successfully applied to the determination of BSA in a bovine serum sample.展开更多
目的研究血清硒蛋白P(SEPP)、摄食抑制因子-1(Nesfatin-1)、肿瘤坏死因子-α(TNF-α)水平与妊娠糖尿病患者胰岛素抵抗的关系。方法回顾性选取2018年1月至2021年6月邢台医学高等专科学校第二附属医院收治的120例妊娠糖尿病患者为观察组,...目的研究血清硒蛋白P(SEPP)、摄食抑制因子-1(Nesfatin-1)、肿瘤坏死因子-α(TNF-α)水平与妊娠糖尿病患者胰岛素抵抗的关系。方法回顾性选取2018年1月至2021年6月邢台医学高等专科学校第二附属医院收治的120例妊娠糖尿病患者为观察组,选择同期健康体检产妇120名为对照组。比较两组血糖指标[空腹血糖(FBG)、餐后30 min血糖(30 min PG)、餐后1 h血糖(1 h PG)、餐后2 h血糖(2 h PG)]及胰岛素分泌指标[空腹胰岛素(FINS)、餐后30 min胰岛素(30 min INS)、餐后1 h胰岛素(1 h INS)、餐后2 h胰岛素(2 h INS)],对比两组胰岛素抵抗相关指数[胰岛素抵抗指数(HOMA-IR)、胰岛素β细胞功能指数(HOMA-β)、早期胰岛素分泌功能指数(△I_(30)/△G_(30))];比较两组血清SEPP、Nesfatin-1、TNF-α水平;分析血清SEPP、Nesfatin-1、TNF-α水平与妊娠糖尿病患者胰岛素抵抗的相关性。结果观察组FBG、30 min PG、1 h PG、2 h PG水平均高于对照组,差异均有统计学意义(P<0.05)。观察组FINS、1 h INS、2 h INS水平高于对照组,差异均有统计学意义(P<0.05),30 min INS较对照组比较差异无统计学意义(P>0.05)。观察组HOMA-IR高于对照组,HOMA-β、△I_(30)/△G_(30)低于对照组,差异均有统计学意义(P<0.05)。观察组Nesfatin-1、TNF-α水平高于对照组,SEPP水平低于对照组,差异均有统计学意义(P<0.05)。经Pearson检验,SEPP与HOMA-β、△I_(30)/△G_(30)呈正相(P<0.05),与HOMA-IR呈负相关(P<0.05);Nesfatin-1、TNF-α与HOMA-IR呈正相关(P<0.05),与HOMA-β、△I_(30)/△G_(30)呈负相关(P<0.05)。结论妊娠糖尿病患者血清Nesfatin-1、TNF-α水平明显上升,SEPP水平明显降低,且与胰岛素抵抗存在一定相关性。展开更多
本文应用放射元疫方法测定了雌性大鼠侧脑室注射 P 物质及其拮抗剂后,在不同性周期中血清内的孕酮含量。以探讨 P 物质对大鼠卵巢孕酮生成的中枢性作用。以人工脑脊液做对照。在间情期,侧脑室注射 P 物质拮抗剂2μg/1μl,使血清孕酮水...本文应用放射元疫方法测定了雌性大鼠侧脑室注射 P 物质及其拮抗剂后,在不同性周期中血清内的孕酮含量。以探讨 P 物质对大鼠卵巢孕酮生成的中枢性作用。以人工脑脊液做对照。在间情期,侧脑室注射 P 物质拮抗剂2μg/1μl,使血清孕酮水平明显增加;而在情前期和情期,侧脑室注射 P 物质1μg/1μl,引起血清孕酮明显降低。这些结果提示,P 物质可能在中枢水平对雌性大鼠孕酮生成具有调节作用。展开更多
文摘Using a novel small-angle X-ray scattering (SAXS) method for determination of fractional and subfractional composition of lipoproteins (LPs), a significant elevation of total cholesterol-lipop- roteins (C-LP) and, especially, total triglyceride- lipoproteins (TG-LP), was shown in this work. Among the LP fractions, poloxamer 407 was shown to significantly increase proatherogenic total C-LDL, TG-LDL and, especially, their precursors C-VLDL and TG-VLDL, while only exhibiting a moderate increase in the antiatherogenic C-HDL and TG-HDL fractions. With regard to the VLDL subfractions, significant elevations were observed in both subfractions studied;namely, C-VLDL1-2 and C-VLDL3-5. Similar chang- es were noted in the TG-VLDL1-2 and TG- VLDL3-5 subfractions. The C-IDL and TG-IDL subfractions were increased significantly (?20- to 30- fold), while the C-LDL1-3 subfraction was moderately (?3- to 5-fold) increased at 48 hrs and at day 4. In the moderately elevated (?2- to 4-fold) anti-atherogenic HDL fraction, the C-HDL2 subfraction was increased more significantly (?4- fold) compared to the C-HDL3 subfraction;how- ever, both C-HDL subfractions returned to base- line by day 4. The elevation in the TG-HDL2 subfraction was observed only at 24 hrs. Mouse models of hyperlipidemia and atherosclerosis are useful to evaluate the role of “individual” LPs, as well as their fractions and subfractions, in hyperlipidemia and the genesis of atherosclerosis.
基金the National Natural Science Foundation of China(No.20575077).
文摘In pH 5.5 phosphate buffer solution, N-n-undecyl-N＇-（sodium-p-amino-benzenesulfonate） thiourea （UPT） produced a pair of redox peaks on the bare glassy carbon electrode. At the multi-walled carbon nanotube （MWNT） modified electrode, the electrochemical behavior of UPT enhanced greatly. In the presence of bovine serum albumin （BSA）, the peak currents of UPT decreased linearly due to the formation of a super-molecular complex. This method was successfully applied to the determination of BSA in a bovine serum sample.
文摘目的研究血清硒蛋白P(SEPP)、摄食抑制因子-1(Nesfatin-1)、肿瘤坏死因子-α(TNF-α)水平与妊娠糖尿病患者胰岛素抵抗的关系。方法回顾性选取2018年1月至2021年6月邢台医学高等专科学校第二附属医院收治的120例妊娠糖尿病患者为观察组,选择同期健康体检产妇120名为对照组。比较两组血糖指标[空腹血糖(FBG)、餐后30 min血糖(30 min PG)、餐后1 h血糖(1 h PG)、餐后2 h血糖(2 h PG)]及胰岛素分泌指标[空腹胰岛素(FINS)、餐后30 min胰岛素(30 min INS)、餐后1 h胰岛素(1 h INS)、餐后2 h胰岛素(2 h INS)],对比两组胰岛素抵抗相关指数[胰岛素抵抗指数(HOMA-IR)、胰岛素β细胞功能指数(HOMA-β)、早期胰岛素分泌功能指数(△I_(30)/△G_(30))];比较两组血清SEPP、Nesfatin-1、TNF-α水平;分析血清SEPP、Nesfatin-1、TNF-α水平与妊娠糖尿病患者胰岛素抵抗的相关性。结果观察组FBG、30 min PG、1 h PG、2 h PG水平均高于对照组,差异均有统计学意义(P<0.05)。观察组FINS、1 h INS、2 h INS水平高于对照组,差异均有统计学意义(P<0.05),30 min INS较对照组比较差异无统计学意义(P>0.05)。观察组HOMA-IR高于对照组,HOMA-β、△I_(30)/△G_(30)低于对照组,差异均有统计学意义(P<0.05)。观察组Nesfatin-1、TNF-α水平高于对照组,SEPP水平低于对照组,差异均有统计学意义(P<0.05)。经Pearson检验,SEPP与HOMA-β、△I_(30)/△G_(30)呈正相(P<0.05),与HOMA-IR呈负相关(P<0.05);Nesfatin-1、TNF-α与HOMA-IR呈正相关(P<0.05),与HOMA-β、△I_(30)/△G_(30)呈负相关(P<0.05)。结论妊娠糖尿病患者血清Nesfatin-1、TNF-α水平明显上升,SEPP水平明显降低,且与胰岛素抵抗存在一定相关性。
文摘本文应用放射元疫方法测定了雌性大鼠侧脑室注射 P 物质及其拮抗剂后,在不同性周期中血清内的孕酮含量。以探讨 P 物质对大鼠卵巢孕酮生成的中枢性作用。以人工脑脊液做对照。在间情期,侧脑室注射 P 物质拮抗剂2μg/1μl,使血清孕酮水平明显增加;而在情前期和情期,侧脑室注射 P 物质1μg/1μl,引起血清孕酮明显降低。这些结果提示,P 物质可能在中枢水平对雌性大鼠孕酮生成具有调节作用。
