TY - JOUR

T1 - Post-mortem changes in metabolomic profiles of human serum, aqueous humor and vitreous humor

AU - Zelentsova, Ekaterina A.

AU - Yanshole, Lyudmila V.

AU - Melnikov, Arsenty D.

AU - Kudryavtsev, Ivan S.

AU - Novoselov, Vladimir P.

AU - Tsentalovich, Yuri P.

PY - 2020/7/1

Y1 - 2020/7/1

N2 - Introduction: Application of metabolomic methods to forensic studies may expand the limits of the post-mortem interval (PMI) estimation, and improve the accuracy of the estimation. To this end, it is important to determine which tissue is the most suitable for analysis, and which compounds are the most promising candidates for PMI estimation. Objectives: This work is aimed at the comparison of human serum, aqueous humor (AH), and vitreous humor (VH) as perspective tissues for metabolomic-based PMI estimation, at the determination of most promising PMI biomarkers, and at the development of method of PMI estimation based on the measurement of concentrations of PMI biomarkers. Methods: Quantitative metabolomic profiling of samples of the human serum, AH, and VH taken at different PMIs has been performed with the use of NMR spectroscopy. Results: It is found that the metabolomic changes in anatomically isolated ocular fluids are slower and smoother than that in blood. A good positive time correlation (Pearson coefficient r > 0.5) was observed for several metabolites, including hypoxanthine, choline, creatine, betaine, glutamate, and glycine. A model for PMI estimation based on concentrations of several metabolites in AH and VH is proposed. Conclusions: The obtained results demonstrate that the metabolomic analysis of AH and VH is more suitable for the PMI estimation than that of serum. The compounds with good positive time correlation can be considered as potential PMI biomarkers.

AB - Introduction: Application of metabolomic methods to forensic studies may expand the limits of the post-mortem interval (PMI) estimation, and improve the accuracy of the estimation. To this end, it is important to determine which tissue is the most suitable for analysis, and which compounds are the most promising candidates for PMI estimation. Objectives: This work is aimed at the comparison of human serum, aqueous humor (AH), and vitreous humor (VH) as perspective tissues for metabolomic-based PMI estimation, at the determination of most promising PMI biomarkers, and at the development of method of PMI estimation based on the measurement of concentrations of PMI biomarkers. Methods: Quantitative metabolomic profiling of samples of the human serum, AH, and VH taken at different PMIs has been performed with the use of NMR spectroscopy. Results: It is found that the metabolomic changes in anatomically isolated ocular fluids are slower and smoother than that in blood. A good positive time correlation (Pearson coefficient r > 0.5) was observed for several metabolites, including hypoxanthine, choline, creatine, betaine, glutamate, and glycine. A model for PMI estimation based on concentrations of several metabolites in AH and VH is proposed. Conclusions: The obtained results demonstrate that the metabolomic analysis of AH and VH is more suitable for the PMI estimation than that of serum. The compounds with good positive time correlation can be considered as potential PMI biomarkers.

KW - Aqueous humor

KW - NMR spectroscopy

KW - PMI estimation

KW - Quantitative metabolomics

KW - Serum

KW - Vitreous humor

KW - INTERVAL

KW - CASE WORK

KW - MARKERS

KW - DNA-DEGRADATION

KW - CEREBROSPINAL-FLUID

KW - PLASMA

KW - INTEGRATION

KW - HYPOXANTHINE

KW - DEATH TIME-ESTIMATION

KW - BLOOD

UR - http://www.scopus.com/inward/record.url?scp=85087319334&partnerID=8YFLogxK

U2 - 10.1007/s11306-020-01700-3

DO - 10.1007/s11306-020-01700-3

M3 - Article

C2 - 32613532

AN - SCOPUS:85087319334

VL - 16

JO - Metabolomics

JF - Metabolomics

SN - 1573-3882

IS - 7

M1 - 80

ER -