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The Origin of Multiple Molecular Forms in Urine of HNL/NGAL

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Cai, Linjun, Rubin, Jenny, Han, Wenyu, Venge, Per, Xu, Shengyuan·2010·Clinical Journal of the American Society of Nephrology

Abstract

BACKGROUND AND OBJECTIVES: Several molecular forms of human neutrophil lipocalin/neutrophil gelatinase-associated lipocalin (HNL/NGAL), a novel biomarker for acute kidney injury (AKI), have been found in urine. The origin of these different forms and the effect of antibody configuration on assay performances were investigated in this report. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: The molecular forms of HNL/NGAL from human neutrophils and present in urine obtained from cardiac surgery patients and patients with urinary tract infection (UTI), as well as secreted from HK-2 cells, were studied by Western blotting. The levels of HNL/NGAL in urine were measured by ELISAs. Kidney injury was simulated by incubation of HK-2 cells under stressful conditions. RESULTS: The major molecular form of HNL/NGAL secreted by neutrophils is dimeric, whereas the major form secreted by HK-2 cells is monomeric. This was reflected by a predominance of the monomeric form in urine from patients with AKI and the dimeric form in patients with UTIs. The epitope specificities of the antibody used in the ELISAs had a profound effect on assay performance and paralleled differences of the antibodies to identify the different forms of urine HNL/NGAL. CONCLUSIONS: The monomeric form is the predominant form secreted by tubular epithelial cells, and the dimeric form is the predominant form secreted by neutrophils. The development of molecular form-specific assays for HNL/NGAL may be a means to identify the origin of HNL/NGAL in urine and construct more specific tools for the diagnosis of AKI.

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Metadata

Authors
Cai, L., Rubin, J., Han, W., Venge, P., & Xu, S.
Venue
Clinical Journal of the American Society of Nephrology
Published
2010-12
Volume
5
Issue
12
Pages
2229-2235
ISSN
1555-9041 (ISSN-L)
OpenAlex
W2119129699
Cited by
295
References
30
FWCI
11.04
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: The Origin of Multiple Molecular Forms in Urine of HNL/NGAL. https://app.cochat.ai/papers/10.2215/cjn.00980110
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Cai, L., Rubin, J., Han, W., Venge, P., & Xu, S. (2010). The Origin of Multiple Molecular Forms in Urine of HNL/NGAL. Clinical Journal of the American Society of Nephrology. https://doi.org/10.2215/cjn.00980110

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.