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Volabolomic Fingerprinting for Post-Mortem Interval Estimation: A Novel Physiological Approach.

Andrea Mazzatenta1, Tiziana Pietrangelo1, Roberto Demontis2

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Summary

Researchers recorded volatile organic compounds (VOCs) released during human decomposition. This volabolomic fingerprinting aids in estimating the postmortem interval (PMI) and has forensic applications.

Keywords:
PMIe-noseforensic metabolomicsforensic sciencehuman decompositionpost-mortem interval estimationskeletal musclevolabolomicsvolatile metabolite biomarkers

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Area of Science:

  • Forensic Science
  • Biochemistry
  • Pathology

Background:

  • Cellular and tissue metabolic homeostasis defines the cessation of function during death.
  • Decomposition releases volatile organic compounds (VOCs), forming the "volaboloma mortis."
  • Accurate estimation of the postmortem interval (PMI) remains a challenge in forensics and pathology.

Purpose of the Study:

  • To record the volabolomic fingerprint of human tissue and muscle cell decomposition.
  • To analyze the volatile chemical signatures produced during physiological decomposition.
  • To explore the utility of volabolomic data for PMI estimation.

Main Methods:

  • Real-time recording of VOCs emitted from human tissues and muscle cells.
  • Utilized an electronic nose sensor device for continuous sampling.
  • Collected data at 0, 24, 48, and 72 hours postmortem.

Main Results:

  • Continuous sampling of VOCs revealed distinct emission patterns over time.
  • VOC distributions showed common behavior initially, becoming dispersed after 48 hours.
  • Increased variability in VOC profiles was observed after 72 hours.
  • Reconstructed volabolomic fingerprinting correlated with time progression.

Conclusions:

  • Volabolomic fingerprinting provides a time-dependent signature of human decomposition.
  • This method offers potential for improving postmortem interval estimation.
  • Broader applications include cadaver dog training and understanding biological attractants.