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- 源自糖基磷脂酰肌醇在亚临床感染犬免疫诊断中的应用

-Derived Glycoinositolphospholipids in the Immunodiagnosis of Subclinically Infected Dogs.

作者信息

Sampaio Julia Ramos, Soares Rodrigo Pedro, Barral Thiago Doria, Passos Gabriela Porfirio, Fonseca Maisa Santos, Meyer Roberto, Barrouin-Melo Stella Maria, Portela Ricardo Wagner

机构信息

Laboratório de Imunologia e Biologia Molecular, Instituto de Ciências da Saúde, Universidade Federal da Bahia, Salvador, Brazil.

Instituto Rene Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil.

出版信息

Front Vet Sci. 2021 Mar 12;8:581148. doi: 10.3389/fvets.2021.581148. eCollection 2021.

Abstract

Lipophosphoglycan (LPG), when used as an ELISA target, confers high specificity and sensitivity to the detection of antibodies in dogs. Glycoconjugates are economically viable because the yield is very high after extraction/purification. In addition, they are very stable, which allows their use in point-of-care testing without special storage conditions. During the glycoconjugate extraction, a glycoinositolphospholipid (GIPL)-enriched fraction is obtained in similar quantities as LPG. Since GIPLs can be extracted from the same parasite pellet as LPGs, this work aimed to evaluate the immune recognition of GIPLs by -infected dogs and its use for canine leishmaniasis (CanL) immunodiagnosis. Like LPG, GIPLs were recognized by sera from -infected dogs, but with less sensitivity (83.8%). However, 80% (16/20) of subclinically infected dogs were detected as positive in the assay. Different from LPG, the GIPL-based assay achieved a lower specificity (73.7%) and cross-reactions occurred with and -infected dogs. Although GIPLs exhibited a similar performance to LPG for subclinically -infected dogs, the occurrence of cross-reactivities with other protozoa and a lower sensitivity hinders its use for an immunodiagnostic test. In places where those diseases do not co-exist such as in the Mediterranean region, its use for subclinically dogs could be an alternative.

摘要

脂磷壁酸聚糖(LPG)用作酶联免疫吸附测定(ELISA)靶点时,对犬类抗体检测具有高特异性和高灵敏度。糖缀合物在经济上可行,因为提取/纯化后的产量很高。此外,它们非常稳定,无需特殊储存条件即可用于即时检测。在糖缀合物提取过程中,会获得数量与LPG相似的富含糖基肌醇磷脂(GIPL)的部分。由于GIPL可与LPG从同一寄生虫沉淀中提取,本研究旨在评估感染犬对GIPL的免疫识别及其在犬利什曼病(CanL)免疫诊断中的应用。与LPG一样,感染犬的血清可识别GIPL,但灵敏度较低(83.8%)。然而,80%(16/20)的亚临床感染犬在该检测中被检测为阳性。与LPG不同,基于GIPL的检测特异性较低(73.7%),且与感染和感染犬发生交叉反应。尽管GIPL对亚临床感染犬的表现与LPG相似,但与其他原生动物发生交叉反应以及灵敏度较低阻碍了其在免疫诊断检测中的应用。在地中海地区等不存在这些疾病共存的地方,将其用于亚临床感染犬可能是一种选择。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d0c/7994360/765df65027ab/fvets-08-581148-g0001.jpg

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