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Blood microsampling from the ear capillary in non-human primates.

Arthur Lefevre1, Sébastien Ballesta2, Mathieu Pozzobon2

  • 1Centre de Neuroscience Cognitive, UMR 5229, CNRS, Bron, France Université Claude Bernard Lyon 1, Villeurbanne, France arthur.lefevre@isc.cnrs.fr sebastien.ballesta@isc.cnrs.fr.

Laboratory Animals
|May 14, 2015
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Summary

Collecting blood from non-human primates (NHPs) ear capillaries is a safe and effective alternative to traditional vein sampling. This refined method improves animal welfare and ensures reliable biological assay results.

Keywords:
blood samplinghead-restrainednon-human primatesrefinement

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Area of Science:

  • Veterinary Science
  • Primate Research
  • Animal Welfare

Background:

  • Traditional blood sampling in non-human primates (NHPs) via cephalic or saphenous veins is invasive, stressful, and can compromise data integrity.
  • Ethical concerns and potential for biased results necessitate refined blood collection methods in laboratory NHPs.

Purpose of the Study:

  • To evaluate the efficacy and safety of ear capillary blood collection in NHPs as an alternative to conventional methods.
  • To validate ear capillary blood sampling for routine biological assays, aligning with the 3R principles (Replacement, Reduction, Refinement).

Main Methods:

  • A novel head-restrained procedure for collecting capillary blood from the ear pinnae of macaques was employed.
  • Concomitant blood samples were collected from ear capillaries and saphenous veins of 16 macaques.
  • Concentrations of total proteins, cortisol, and vasopressin were measured in both sample types.

Main Results:

  • Strong correlations were observed between ear capillary and saphenous vein samples for total proteins (r=0.72), cortisol (r=0.63), and vasopressin (r=0.83), all with P<0.01.
  • No significant differences in analyte concentrations were found between the two sampling methods.
  • The ear capillary method successfully yielded 500 µL of blood per puncture, sufficient for most biological assays.

Conclusions:

  • Ear capillary blood collection is a validated, harmless, and routine alternative to classical venipuncture in NHPs.
  • This refined technique enhances animal welfare and improves the reliability of scientific findings.
  • The method supports the ethical implementation of the 3R principles in non-human primate research.