Casomorphin

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Bovine b-casomorphin 7, a casomorphin, has seven amino acids in its peptide sequence. Bovine b-casomorphin 7.svg
Bovine β-casomorphin 7, a casomorphin, has seven amino acids in its peptide sequence.

Casomorphin is an opioid peptide (protein fragment) derived from the digestion of the milk protein casein. [1]

Contents

Health

Digestive enzymes can break casein down into peptides that have some biological activity in cells and in laboratory animals though conclusive causal effects on humans have not been established. [1]

Although research has shown high rates of use of complementary and alternative therapies for children with autism, including gluten and/or casein exclusion diets, as of 2008 there was a lack of evidence that these diets had any effect. [2]

If opioid peptides breach the intestinal barrier, typically linked to permeability and constrained biosynthesis of dipeptidyl peptidase-4 (DPP4), they can attach to opioid receptors. Elucidation requires a systemic framework that acknowledges that public-health effects of food-derived opioids are complex with varying genetic susceptibility and confounding factors, together with system-wide interactions and feedbacks. [3]

List of known casomorphins (non-exhaustive)

β-Casomorphins 1–3

Bovine β-casomorphins 1–4

Bovine β-casomorphin 1–4, amide

Also known as morphiceptin

Bovine β-casomorphin 5

Bovine β-casomorphin 7

Bovine β-casomorphin 8

(Note: There is also a form of bovine β-casomorphin 8 that has histidine instead of proline in position 8, depending on whether it is derived from A1 (His) or A2 (Pro) beta-casein.)

References

  1. 1 2 European Food Safety Authority. 1 February 2009 Review of the potential health impact of β-casomorphins and related peptides
  2. Millward, C; Ferriter, M; Calver, S; Connell-Jones, G (2008). "Gluten- and casein-free diets for autistic spectrum disorder". Cochrane Database of Systematic Reviews (2): CD003498. doi:10.1002/14651858.CD003498.pub3. PMC   4164915 . PMID   18425890.
  3. Keith, Bernard Woodford (2021). "Casomorphins and Gliadorphins Have Diverse Systemic Effects Spanning Gut, Brain and Internal Organs". Int J Environ Res Public Health. 18 (15): 7911. doi: 10.3390/ijerph18157911 . PMC   8345738 . PMID   34360205.