A longitudinal assessment of miR-122 and GLDH as biomarkers of drug-induced liver injury in the rat

作者：Thulin Petra; Hornby Robert J; Auli Mariona; Nordahl Gunnar; Antoine Daniel J; Lewis Philip Starkey; Goldring Christopher E; Park B Kevin; Prats Neus; Glinghammar Bjorn; Schuppe Koistinen Ina

来源：Biomarkers, 2017, 22(5): 461-469.

DOI：10.1080/1354750X.2016.1269131

• Hepatotoxicity
• acetaminophen
• exosomes
• ALT
• GLDH
• miR-122

Context: There is an ongoing search for specific and translational biomarkers of drug-induced liver injury (DILI). MicroRNA-122 (miR-122) has previously shown potential as a sensitive, specific, and translational biomarker of DILI in both rodent, and human studies.Objective: To build on previous work within the field, we examined biomarker kinetics in a rat model of acetaminophen (APAP)-induced liver injury to confirm the sensitivity, and specificity of miR-122 and glutamate dehydrogenase (GLDH).Materials and methods: qRT-PCR and a standard enzymatic assay were used for biomarker analysis.Results: Both miR-122 and GLDH were demonstrated to be more readily-detectable biomarkers of APAP-DILI than alanine aminotransferase (ALT). Peak levels for all biomarkers were detected at 2 days after APAP. At day 3, miR-122 had returned to baseline; however, other biomarkers remained elevated between 3 and 4 days. We were also able to demonstrate that, although miR-122 is present in greater quantities in exosome-free form, both exosome-bound and non-vesicle bound miR-122 are released in a similar profile throughout the course of DILI.Discussion and conclusions: Together, this study demonstrates that both GLDH and miR-122 could be used during preclinical drug-development as complementary biomarkers to ALT to increase the chance of early detection of hepatotoxicity.

• 出版日期2017