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通过单体和蛋白A纯化的多克隆人免疫球蛋白改善葡萄球菌感染的检测

Improved detection of a staphylococcal infection by monomeric and protein A-purified polyclonal human immunoglobulin.

作者信息

Calame W, Welling M, Feitsma H I, Ensing G J, Pauwels E K

机构信息

Department of Diagnostic Radiology and Nuclear Medicine, University Hospital, Leiden, The Netherlands.

出版信息

Eur J Nucl Med. 1993 Jun;20(6):490-4. doi: 10.1007/BF00175161.

DOI:10.1007/BF00175161
PMID:8339732
Abstract

The present study was undertaken to compare the technetium-99m labelled non-specific polyclonal human immunoglobulin (Ig) with 99mTc-labelled monomeric human immunoglobulin (m-Ig), 99mTc-labelled, protein A-purified, human immunoglobulin (A-Ig) and 99mTc-labelled monomeric, protein A-purified, human immunoglobulin (mA-Ig) as tracer agents for the detection of a thigh infection with Staphylococcus aureus. In vitro the binding of the various tracer agents to bacteria at various intervals was determined. For the in vivo evaluation, mice were infected and received one of the various labelled proteins. Scintigrams were made 0.25, 1, 4 and 24 h later. All 99mTc-labelled Igs bound to bacteria in vitro: the percentages of binding for the m-Ig (from 1 h onwards) and A-Ig and mA-Ig (from 3 h onwards) were significantly higher than that for Ig. The in vivo target-to-non-target (T/NT) ratios were significantly higher from 4 h onwards for all purified Igs than for Ig. Protein A-purified Igs yielded higher T/NT ratios than m-Ig. Furthermore, the amount of activity in the liver was significantly lower 24 h after administration of m-Ig, A-Ig and mA-Ig than after administration of Ig. It is concluded that in this experimental infection 99mTc-labelled monomeric Ig localizes a staphylococcal thigh infection better and faster than 99mTc-labelled unpurified Ig. However, the accumulation obtained with protein A-purified Ig or protein A-purified monomeric Ig was the highest of all tracer agents tested.

摘要

本研究旨在比较锝-99m标记的非特异性多克隆人免疫球蛋白(Ig)与锝-99m标记的单体人免疫球蛋白(m-Ig)、锝-99m标记的蛋白A纯化的人免疫球蛋白(A-Ig)以及锝-99m标记的单体、蛋白A纯化的人免疫球蛋白(mA-Ig)作为检测金黄色葡萄球菌引起的大腿感染的示踪剂。在体外,测定了不同示踪剂在不同时间间隔与细菌的结合情况。为了进行体内评估,将小鼠感染并给予各种标记蛋白之一。在0.25、1、4和24小时后进行闪烁扫描。所有锝-99m标记的Ig在体外均能与细菌结合:m-Ig(从1小时起)、A-Ig和mA-Ig(从3小时起)的结合百分比显著高于Ig。从4小时起,所有纯化Ig的体内靶标与非靶标(T/NT)比率均显著高于Ig。蛋白A纯化的Ig产生的T/NT比率高于m-Ig。此外,给予m-Ig、A-Ig和mA-Ig 24小时后肝脏中的活性量显著低于给予Ig后。得出的结论是,在这种实验性感染中,锝-99m标记的单体Ig比锝-99m标记的未纯化Ig能更好、更快地定位金黄色葡萄球菌引起的大腿感染。然而,在所有测试的示踪剂中,蛋白A纯化的Ig或蛋白A纯化的单体Ig的积聚量最高。

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本文引用的文献

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"Protein A" from S. aureus. I. Pseudo-immune reaction with human gamma-globulin.来自金黄色葡萄球菌的“蛋白A”。I. 与人γ-球蛋白的假免疫反应。
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Contribution of phagocytic cells and bacteria to the accumulation of technetium-99m labelled polyclonal human immunoglobulin at sites of inflammation.吞噬细胞和细菌对炎症部位锝-99m标记的多克隆人免疫球蛋白蓄积的作用。
Eur J Nucl Med. 1995 Jul;22(7):638-44. doi: 10.1007/BF01254565.
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Radiolabeled, nonspecific, polyclonal human immunoglobulin in the detection of focal inflammation by scintigraphy: comparison with gallium-67 citrate and technetium-99m-labeled albumin.放射性标记的非特异性多克隆人免疫球蛋白在闪烁扫描术检测局灶性炎症中的应用:与枸橼酸镓-67和锝-99m标记白蛋白的比较
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Scintigraphic detection of bone and joint infections with indium-111-labeled nonspecific polyclonal human immunoglobulin G.用铟 - 111标记的非特异性多克隆人免疫球蛋白G进行骨与关节感染的闪烁扫描检测。
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