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Related Experiment Video

Updated: Oct 22, 2025

LC-MS Analysis of Human Platelets as a Platform for Studying Mitochondrial Metabolism
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Human Platelet Mitochondrial Function Reflects Systemic Mitochondrial Alterations: A Protocol for Application in

Florian Hoppel1,2, Luiz Felipe Garcia-Souza1,3, Wilhelm Kantner-Rumplmair4

  • 1Oroboros Instruments, 6020 Innsbruck, Austria.

Cells
|August 27, 2021
PubMed
Summary

This study validates a reliable method for assessing mitochondrial function in human platelets (PLTs) using high-resolution respirometry. The protocol is effective for both laboratory and field studies, even after intense physical stress.

Keywords:
field studymitochondrial functionphysical exerciseplateletsquality controlrespirometry

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Area of Science:

  • Biochemistry
  • Physiology
  • Mitochondrial Biology

Background:

  • Mitochondrial dysfunction is linked to various systemic diseases.
  • Human blood cells, particularly platelets (PLTs), offer a minimally invasive source for studying systemic mitochondrial alterations.
  • Standardized protocols are needed to ensure reliable measurements in diverse settings.

Purpose of the Study:

  • To evaluate the reliability of a high-resolution respirometry (HRR) protocol for assessing mitochondrial respiratory control in human platelets (PLTs).
  • To validate the protocol's applicability in both laboratory (LAB) and field settings, including post-exercise conditions.
  • To establish inter-chamber variability (∆ab) as a quality control parameter for platelet assays.

Main Methods:

  • Human platelets (PLTs) were analyzed using high-resolution respirometry (HRR) with an Oroboros Oxygraph-2k.
  • Inter-chamber variability (∆ab) was calculated by normalizing oxygen consumption to chamber volume (J) or flux control ratio (FCR).
  • The protocol's reliability was tested by comparing LAB experiments with field data from an ultramarathon study (PRE, POST, REC sampling points).

Main Results:

  • Inter-chamber variability normalized to chamber volume (∆ab J) showed significant changes between LAB and POST/REC, and PRE and POST conditions.
  • Inter-chamber variability calculated using the flux control ratio (∆ab FCR) remained consistently unchanged across all conditions.
  • This indicates that FCR is a robust parameter for quality control in platelet mitochondrial assays.

Conclusions:

  • The developed HRR protocol is reliable for assessing human platelet mitochondrial function in both laboratory and field studies.
  • The flux control ratio (FCR) serves as a dependable metric for ensuring experimental quality, even after significant systemic stress like ultramarathon running.
  • This method provides a valuable tool for minimally invasive monitoring of systemic mitochondrial health.