The role of plant cell wall encapsulation and porosity in regulating lipolysis during the digestion of almond seeds.
Level 5 - mechanism / opinion, no new human data
Bench research using in vitro digestion models without human subjects
PubMed 26503478 · doi:10.1039/c5fo00758e
What was done
The authors evaluated how plant cell wall encapsulation affects the bioaccessibility and digestion of almond lipid using in vitro gastric and duodenal digestion models. Digestibility experiments compared raw almond cells, roasted almond cells, and isolated almond oil bodies. Residual triacylglycerols and lipolysis products were extracted after 1 hour of incubation and analyzed by thin-layer chromatography, lipolysis kinetics were assessed via the pH-stat method, and lipase penetration across cell walls was observed using confocal microscopy.
What was found
The abstract reports no numerical values, kinetic rates, or statistical test results. Qualitatively, lipolysis rates and extent differed between intact almond cells and isolated oil bodies across all lipases evaluated. Intact cell walls limited lipid digestibility by restricting the diffusion of pancreatic lipase into the cell and the release of lipolysis products.
Why it matters
The findings describe the physical encapsulation mechanism that explains why lipid bioavailability from whole or coarsely milled almonds is lower than that of extracted almond oil.
Limits
The investigation was conducted entirely in vitro and does not capture human chewing variability, physiological transit dynamics, or in vivo absorption. The abstract reports no quantitative data or replicate sample numbers.
Cited by
- supports Blending plant foods ruptures cell walls to increase bioavailability and access to cellular nutrients compared to whole plants.