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J Clin Lab Anal ; 36(9): e24603, 2022 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-35870181

RESUMO

AIM: To establish a highly sensitive time-resolved fluorescence immunoassay (TRFIA) of kidney injury molecule-1 (Kim-1) and evaluate its clinical value in acute kidney injury (AKI). METHODS: The Kim-1-TRFIA was established by the double-antibody sandwich method, and the method was evaluated. The established Kim-1-TRFIA was used to detect the concentration of Kim-1 in the serum of healthy controls and patients with AKI. RESULTS: The optimal coating antibody concentration and optimal Eu3+ -labeled antibody dilution ratio for Kim-1-TRFIA are 1 µg/ml and 1:140, respectively. The linear range is 42.71-4666.69 pg/ml. The intra- and inter-assay coefficients of variation are <10%. The specificity of our Kim-1-TRFIA is acceptable. The recovery is between 95.14% and 102.84%. The concentration of Kim-1 in the serum of patients with AKI is 126.50 ± 67.99 pg/ml, which is significantly higher than that in the serum of healthy controls (49.72 ± 16.40 pg/ml, p < 0.001). Staging patients with AKI by glomerular filtration rate shows that the serum concentration of Kim-1 increases significantly with increasing disease severity (p < 0.05). CONCLUSION: A highly sensitive Kim-1-TRFIA was established. With this immunoassay, a good differential diagnosis can be made, and healthy people and AKI patients can be differentiated by detecting the concentration of Kim-1 in the serum. Moreover, the severity of AKI patients can be determined.


Assuntos
Injúria Renal Aguda , Injúria Renal Aguda/diagnóstico , Biomarcadores , Fluorimunoensaio/métodos , Receptor Celular 1 do Vírus da Hepatite A , Humanos , Imunoensaio/métodos , Testes Imunológicos , Soro
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