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Influence of genetic variants and sialylation of purified κ-casein on peptide release during in vitro digestion

Sheng, Bulei ; Poulsen, Nina A. ; Glantz, Maria LU ; Paulsson, Marie LU ; Larsen, Lotte B. and Nielsen, Søren D. (2023) In Food Chemistry Advances 3.
Abstract

In the present study, digestion pattern of purified bovine κ-casein (κ-CN) variants A, B, E as well as desialylated variant B, using INFOGEST 2.0 in vitro gastrointestinal digestion were investigated using peptidomics. Peptide profiles of the digests were identified and quantified using ion abundancies by liquid chromatography electrospray quadropole time of flight mass spectrometry (LC-ESI/Q-TOF MS/MS). Results showed that the κ-CN variants A and E had comparable digestion patterns at most digestion time points. In the in vitro gastric and in the initial intestinal phases fewer peptides and with lower total abundances were identified for variant B compared to variants A and E, indicating a slower digestion rate for κ-CN B. By... (More)

In the present study, digestion pattern of purified bovine κ-casein (κ-CN) variants A, B, E as well as desialylated variant B, using INFOGEST 2.0 in vitro gastrointestinal digestion were investigated using peptidomics. Peptide profiles of the digests were identified and quantified using ion abundancies by liquid chromatography electrospray quadropole time of flight mass spectrometry (LC-ESI/Q-TOF MS/MS). Results showed that the κ-CN variants A and E had comparable digestion patterns at most digestion time points. In the in vitro gastric and in the initial intestinal phases fewer peptides and with lower total abundances were identified for variant B compared to variants A and E, indicating a slower digestion rate for κ-CN B. By desialylation, the digestion rate of desialylated variant B in both gastric and initial intestinal phases increased compared to the natural sialylated counterpart. Bioinformatics search revealed nine potential bioactive peptides released from all three variants A, B and E by the in vitro intestinal digestion, with four additional potential bioactive peptides being released after desialylation of κ-CN B.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Desialylation, Genetic variants, Peptidomics, κ-CN
in
Food Chemistry Advances
volume
3
article number
100483
publisher
Elsevier
external identifiers
  • scopus:85174162815
ISSN
2772-753X
DOI
10.1016/j.focha.2023.100483
language
English
LU publication?
yes
id
723cbd06-b4c0-491b-bd74-b82a97ae9418
date added to LUP
2023-12-07 15:10:30
date last changed
2023-12-21 23:55:49
@article{723cbd06-b4c0-491b-bd74-b82a97ae9418,
  abstract     = {{<p>In the present study, digestion pattern of purified bovine κ-casein (κ-CN) variants A, B, E as well as desialylated variant B, using INFOGEST 2.0 in vitro gastrointestinal digestion were investigated using peptidomics. Peptide profiles of the digests were identified and quantified using ion abundancies by liquid chromatography electrospray quadropole time of flight mass spectrometry (LC-ESI/Q-TOF MS/MS). Results showed that the κ-CN variants A and E had comparable digestion patterns at most digestion time points. In the in vitro gastric and in the initial intestinal phases fewer peptides and with lower total abundances were identified for variant B compared to variants A and E, indicating a slower digestion rate for κ-CN B. By desialylation, the digestion rate of desialylated variant B in both gastric and initial intestinal phases increased compared to the natural sialylated counterpart. Bioinformatics search revealed nine potential bioactive peptides released from all three variants A, B and E by the in vitro intestinal digestion, with four additional potential bioactive peptides being released after desialylation of κ-CN B.</p>}},
  author       = {{Sheng, Bulei and Poulsen, Nina A. and Glantz, Maria and Paulsson, Marie and Larsen, Lotte B. and Nielsen, Søren D.}},
  issn         = {{2772-753X}},
  keywords     = {{Desialylation; Genetic variants; Peptidomics; κ-CN}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Food Chemistry Advances}},
  title        = {{Influence of genetic variants and sialylation of purified κ-casein on peptide release during in vitro digestion}},
  url          = {{http://dx.doi.org/10.1016/j.focha.2023.100483}},
  doi          = {{10.1016/j.focha.2023.100483}},
  volume       = {{3}},
  year         = {{2023}},
}