Are prealbumin plasma levels linked to amino acid supply from peripheral tissues in liver cirrhosis?

Summary Prealbumin plasma level is considered a good index of liver function in liver cirrhosis. However, plasma protein levels depend not only on liver function, but also on amino acid supply which is consequent to nutritional status.In 12 cirrhotics we measured prealbumin plasma levels and the lower limb venous-artero difference of amino acid plasma levels in blood samples taken from femoral vein and femoral artery in post-absorptive conditions considered as a direct index of protein release from peripheral tissues and an indirect index of protein nutritional status.In arterial and in venous plasma amino acid sum was 1.86±0.40 (mean + sd) and 2.00 ± 0.04 mMol/l respectively.Prealbumin plasma levels were found directly correlated with the venousartero difference of amino acid plasma levels (r = 0.57p < 0.05) and of glutamate + glutamine levels (r = 0.73p < 0.007).In conclusions, these data suggest that prealbumin plasma levels are linked to amino acid supply from peripheral tissues in cirrhotics.     

人工繁殖恒河猴的血清前清蛋白、转铁蛋白、苹果酸脱氢酶和醇脱氢酶遗传多态性研究

用薄层聚丙烯酰胺凝胶电泳方法分析118头人繁殖恒河猴血清四种蛋白质和同工酶遗传基因位点的多态性,结果表明,除醇脱氢酶(ADH)为单态外,其余三个基因位点均表现多态,前清蛋白(PA)可分为AA、AB、AC、AD和BB、CC,EE七种表型,各基因的频率为A 0.85,B 0.072,C 0.042,D 0.009,E 0.034转铁蛋白(Tf)可分为CC、DD、EE、FFGG、CD、CE、CG、CH、DE、DF、DG、DH、EF、EG、EH、FG十七种表型,墓因频率为C 0.064,D 0.380,E 0.188,F 0.111,G 0.244,H 0.014,苹果酸脱氢酶(MDH)可分MDH)1-1和MDH2-1两种表型,基因频率为MDH~10.958和MDH~20.042。     

Biomarkers in critically ill patients with systemic inflammatory response syndrome or sepsis supplemented with high-dose selenium

ObjectiveLow levels of selenium (Se) and glutathione peroxidase (GSHPx), a key selenoenzyme, were documented in systemic inflammatory response syndrome (SIRS) and sepsis, both associated with high mortality. Se supplementation had mixed effects on outcome. We hypothesized that Se supplementation could have a different impact on biomarkers and 28-day mortality in patients with SIRS vs. sepsis.MethodsAdult patients with SIRS or sepsis were randomized to either high-dose (Se+, n = 75) or standard-dose (Se−, n = 75) Se supplementation. Plasma Se, whole blood GSHPx activity, C-reactive protein (CRP), procalcitonin (PCT), prealbumin, albumin and cholesterol levels were measured serially up to day 14.ResultsThere was no difference in mortality between Se− (24/75) vs. Se+ group (19/75; p = 0.367) or between SIRS and septic patients (8/26 vs. 35/124; p = 0.794). There was a trend to reduced mortality in SIRS patients in the Se+ vs. Se− group (p = 0.084). Plasma Se levels increased in the Se+ group only in patients with sepsis but not in patients with SIRS. Plasma Se levels correlated with GSHPx. In SIRS/Se+ group, Se correlated only with GSHPx. In SIRS/Se− group, Se correlated with cholesterol but not with other biomarkers. In sepsis patients, Se levels correlated with cholesterol, GSHPx and prealbumin. Cholesterol levels were higher in survivors in the Se− group.ConclusionsSe levels correlated with GSHPx activity and other nutritional biomarkers with significant differences between SIRS and sepsis groups. High-dose Se supplementation did not affect mortality but a strong trend to decreased mortality in SIRS patients warrants further studies in this population.     

血清AIb、PA、NLR水平在直肠癌术后发生吻合口瘘评估中的应用

摘要 目的：探讨血清白蛋白（AIb）、前白蛋白（PA）、中性粒细胞与淋巴细胞比值（NLR）水平在直肠癌术后发生吻合口瘘评估中的应用。方法：选择2018年6月至2019年12月于我院进行直肠癌手术患者90例患者进行研究,其中38例发生术后吻合口瘘,设为研究组, 52例未发生吻合口瘘作为对照组。分析患者术后血清AIb、PA、NLR水平变化情况,采用受试者工作特征曲线分析血清AIb、PA、NLR对术后发生吻合口瘘的评估作用。结果：研究组血清AIb、PA水平显著低于对照组,NLR水平显著高于对照组,差异显著（P＜0.05）;造口组术后血清AIb、PA水平显著高于未造口组,NLR水平显著低于未造口组,差异显著（P＜0.05）;ROC结果显示,血清AIb预测术后吻合口瘘的AUC为0.967,灵敏度为81.25%,特异度为90.14%,截断值为33.06 g/L;血清PA预测术后吻合口瘘的AUC为0.772,灵敏度为80.36%,特异度为89.56%,截断值为119.04 mg/L;血清NLR预测术后吻合口瘘的AUC为0.991,灵敏度为85.62%,特异度为93.23%,截断值为6.86。结论：监测血清AIb、PA、NLR水平有助早期发现直肠癌患者术后吻合口瘘。     

维生素D联合肺泡灌洗对机械通气重症肺炎患者血清CHE、PA的影响

摘要 目的：探讨维生素D联合肺泡灌洗对机械通气重症肺炎患者血清胆碱酯酶（Cholinesterase,CHE）、前白蛋白（Prealbumin,PA）的影响。方法：2018年8月到2021年2月选择在本院重症监护病房（Intensive Care Unit,ICU）诊治的重症肺炎患者78例作为研究对象,根据随机信封1:1抽签原则将患者分为联合组与对照组各39例。对照组给予肺泡灌洗治疗,联合组在对照组治疗基础上给予外源性维生素D治疗,两组均给予机械通气治疗,且治疗观察2周。结果：治疗后联合组的总有效率为97.4 %,高于对照组的84.6 %（P<0.05）。所有患者在治疗期间都无出现窒息、气胸、气道痉挛、心律失常等不良反应,联合组的入住ICU时间与ICU费用少于对照组（P<0.05）。两组治疗后的第1秒FEV₁、PaO₂高于治疗前（P<0.05）,联合组高于对照组（P<0.05）。两组治疗后的血清CHE、PA水平高于治疗前（P<0.05）,联合组高于对照组（P<0.05）。结论：维生素D联合肺泡灌洗在机械通气重症肺炎患者的应用能抑制血清CHE、PA的表达,改善血气状况与肺功能,提高治疗效果,缩短入住ICU时间与降低ICU费用。     

Cellular origin of prealbumin in the rat

The synthetic rate of prealbumin and albumin in primary monolayer cultures of rat hepatocytes was measured by immunochemical methods. The isolated hepatocytes synthesized these proteins in the same ratio as that previously found for the whole body synthesis in vivo. It is concluded that the hepatocytes synthesize the main part of prealbumin in the rat.     

急性胰腺炎患者血清PAB、HMGB1、SIL-2R、ACE2水平变化及意义

摘要 目的：探讨急性胰腺炎患者血清前白蛋白（PAB）、高迁移率族蛋白 B1（HMGB1）、可溶性白介素2受体(SIL-2R)、紧张素转化酶2（ACE2）水平变化及意义。方法：选择2018年7月至2020年7月于我院进行治疗的急性胰腺炎患者83例患者进行研究,设为病例组,并选择我院同期体检健康者70例作为对照组,分析患者血清PAB、HMGB1、SIL-2R、ACE2及急性生理功能和慢性健康状况评分系统Ⅱ（APACHEII）评分水平变化情况及之间的相关性,采用受试者工作特征曲线分析血清PAB、HMGB1、SIL-2R、ACE2的诊断价值。结果：病例组患者血清PAB、ACE2水平显著低于对照组,HMGB1、SIL-2R、APACHEII评分水平显著高于对照组,差异显著（P＜0.05）;轻症组血清PAB、ACE2水平显著高于重症组,HMGB1、SIL-2R、APACHEII评分水平显著低于重症组,差异显著（P＜0.05）;Pearson相关分析结果显示,血清PAB、ACE2与APACHEⅡ之间呈负相关（P<0.05）,血清HMGB1、SIL-2R与APACHEⅡ之间呈正相关（P<0.05）;血清PAB预测急性胰腺炎的临界值为147.09 mg/L,灵敏度为80.54%,特异度为85.68%,AUC为0. 845,血清HMGB1预测急性胰腺炎的临界值为85.34 ng/L,灵敏度为81.65%,特异度为86.69%,AUC为0. 998,血清SIL-2R预测急性胰腺炎的临界值为25.47 pg/mL,灵敏度为81.59%,特异度为87.57%,AUC为0. 978,血清ACE2预测急性胰腺炎的临界值为298.57 pg/mL,灵敏度为80.19%,特异度为83.58%,AUC为0. 867。结论：血清PAB、HMGB1、SIL-2R、ACE2的表达与APACHEII评分之间密切相关,对急性胰腺炎具有较高的预测价值。     

Isolation,purification and partial characterisation of prealbumin from cerebrospinal fluid

Prealbumin from human cerebrospinal fluid was purified using a combination of ammonium sulphate precipitation, phenol precipitation, Polyacrylamide disc gel electrophoresis and gel filtration on Sephadex G-100. The homogeneity of the purified protein was established by Polyacrylamide gel electrophoresis and Immunoelectrophoresis. On the basis of its molecular weight (55,000), amino acid composition, electrophoretic mobility and immunological cross-reactivity, the prealbumin from cerebrospinal fluid showed complete identity with serum prealbumin. The cerebrospinal fluid prealbumin levels in various neurological disorders may have a diagnostic significance. Part of the Ph. D. thesis submitted by the first author.     

血清视黄醇结合蛋白4与慢性乙肝的相关性分析

目的：观察慢性乙肝患者血清视黄醇结合蛋白4（RBP4）、前白蛋白（PA）、血氨水平,分析RBP4与慢性乙肝的相关性。方法：采集90例慢性乙肝患者分为轻度组26例,中度组34例,重度组30例,另选择30例健康对照组。采用酶联免疫吸附法（ELISA）测定血清RBP4水平,采用免疫透射比浊法测定血清PA水平,用全自动生化分析仪测定血氨水平。结果：血清RBP4、PA在病例组中低于对照组,差异有统计学意义（P〈0.05）,血氨水平在病例组中高于对照组,差异有统计学意义（P〈0.05）。血清RBP4、PA、血氨水平在轻度、中度、重度组内比较P〈0.05,有统计学意义。经Pearson＇s相关分析,血清RBP4与PA浓度呈显著正相关相关（r=0.896,P〈0.01）,与血氨浓度呈显著负相关（r=-0.781,P〈0.01）。结论：RBP4与慢性乙肝存在一定的相关性,与肝脏的损伤程度有关,可作为预测肝脏损伤的血清标志物。     

血清视黄醇结合蛋白4与慢性乙肝的相关性分析

目的:观察慢性乙肝患者血清视黄醇结合蛋白4(RBP4)、前白蛋白(PA)、血氨水平,分析RBP4与慢性乙肝的相关性。方法:采集90例慢性乙肝患者分为轻度组26例,中度组34例,重度组30例,另选择30例健康对照组。采用酶联免疫吸附法(ELISA)测定血清RBP4水平,采用免疫透射比浊法测定血清PA水平,用全自动生化分析仪测定血氨水平。结果:血清RBP4、PA在病例组中低于对照组,差异有统计学意义(P<0.05),血氨水平在病例组中高于对照组,差异有统计学意义(P<0.05)。血清RBP4、PA、血氨水平在轻度、中度、重度组内比较P<0.05,有统计学意义。经Pearson’s相关分析,血清RBP4与PA浓度呈显著正相关相关(r=0.896,P<0.01),与血氨浓度呈显著负相关(r=-0.781,P<0.01)。结论:RBP4与慢性乙肝存在一定的相关性,与肝脏的损伤程度有关,可作为预测肝脏损伤的血清标志物。