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Related Experiment Video

Updated: Mar 29, 2026

Sampling Human Indigenous Saliva Peptidome Using a Lollipop-Like Ultrafiltration Probe: Simplify and Enhance Peptide Detection for Clinical Mass Spectrometry
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A Minimally Invasive LC-MS/MS Approach for Assessing Endocannabinoids in Saliva and Capillary Blood Microsamples.

Jessica Hargreaves1, Gabrielle Eddes1, David S Nichols2

  • 1School of Psychology and Counselling, Queensland University of Technology, 2 George St, Brisbane, QLD 4000, Australia.

Biosensors
|March 27, 2026
PubMed
Summary
This summary is machine-generated.

This study validates minimally invasive methods for measuring endocannabinoid molecules like AEA and 2-AG in saliva and finger-prick blood. This advance supports more accessible research into the endocannabinoid system and related health conditions.

Keywords:
2-arachidonoylglycerolLC–MS/MSN-arachidonoylethanolamineendocannabinoidsfinger-prick bloodlipid signallingmethod validationmicrosamplingminimally invasive samplingsaliva

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Area of Science:

  • Biochemistry
  • Neuroscience
  • Analytical Chemistry

Background:

  • Endocannabinoid system (ECS) regulates physiological processes and is linked to diseases.
  • Quantifying endocannabinoids like N-arachidonoylethanolamine (AEA) and 2-arachidonoylglycerol (2-AG) is crucial for human ECS research.
  • Current methods often rely on invasive venipuncture, limiting research scalability.

Purpose of the Study:

  • To validate extraction and LC-MS/MS methods for quantifying AEA and 2-AG in minimally invasive matrices.
  • To assess the feasibility of using saliva and finger-prick blood microsamples for endocannabinoid research.
  • To explore multiplexed analysis of other biomarkers alongside AEA and 2-AG.

Main Methods:

  • Validated liquid chromatography-tandem mass spectrometry (LC-MS/MS) for AEA and 2-AG quantification.
  • Utilized saliva and finger-prick blood microsamples.
  • Exploratory quantification of arachidonic acid, OEA, PEA, and steroid hormones.

Main Results:

  • The validated method demonstrated acceptable linearity, recovery, reproducibility, and matrix effects for AEA and 2-AG.
  • Microsample analyte concentrations reflected relative within-study changes, not absolute plasma equivalence.
  • Venipuncture did not significantly alter salivary AEA or 2-AG concentrations.

Conclusions:

  • Developed a minimally invasive and accessible method for endocannabinoid research.
  • Facilitates investigation of endocannabinoid dynamics using saliva and blood microsamples.
  • Enables multiplexed assessment of AEA, 2-AG, and other biomarkers from a single sample.