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Unveiling plant protein astringency perception through neural and cellular responses.

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Plant protein astringency, a dryness sensation, hinders acceptance of plant-based foods. This study reveals it involves neural responses and salivary mucin binding, similar to tannins.

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Area of Science:

  • Food Science
  • Sensory Science
  • Neuroscience

Background:

  • Plant proteins offer sustainable nutrition but have an astringency challenge impacting consumer acceptance.
  • Astringency, a sensation of dryness, is a major barrier to plant-based food development.

Purpose of the Study:

  • To experimentally investigate the origin of astringency in plant proteins.
  • To understand the sensory, neural, and cellular mechanisms underlying plant protein astringency.

Main Methods:

  • Sensory profiling was combined with functional near-infrared spectroscopy (fNIRS).
  • In vitro, in vivo, and ex vivo studies utilized cell lines mimicking oral epithelium.
  • Salivary mucin binding and neural responses in the prefrontal cortex were analyzed.

Main Results:

  • Plant protein astringency elicits a distinct neural response in the prefrontal cortex.
  • Astringency is linked to salivary mucin binding, mirroring tannin-like effects.
  • Quantitative evidence for previously uncharacterized plant protein astringency was uncovered.

Conclusions:

  • Plant protein astringency has identifiable sensory, neural, and cellular origins.
  • Understanding these mechanisms is key to overcoming acceptance barriers for plant-based foods.
  • This research paves the way for developing palatable, eco-friendly plant protein foods.