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Related Experiment Videos

Hypotensive peptides from milk proteins.

Richard J FitzGerald1, Brian A Murray, Daniel J Walsh

  • 1Department of Life Sciences, University of Limerick, Limerick, Ireland. dick.fitzgerald@ul.ie

The Journal of Nutrition
|March 31, 2004
PubMed
Summary

Milk proteins contain peptides that inhibit the renin-angiotensin-aldosterone system, offering a natural approach to lower blood pressure and reduce cardiovascular disease risk. This may significantly decrease global healthcare costs associated with hypertension management.

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Area of Science:

  • Cardiovascular Science
  • Nutritional Biochemistry
  • Pharmacology

Background:

  • Hypertension is a primary modifiable risk factor for cardiovascular disease (CVD), contributing to conditions like myocardial infarction and stroke.
  • Antihypertensive medications, targeting the renin-angiotensin-aldosterone system, incur significant healthcare costs and are associated with various side effects.
  • Milk proteins, including caseins and whey, are recognized sources of bioactive peptides with potential therapeutic properties.

Purpose of the Study:

  • To explore the potential of milk protein-derived peptides as a natural antihypertensive agent.
  • To investigate the role of these peptides in modulating the renin-angiotensin-aldosterone system.
  • To assess the implications for reducing cardiovascular disease burden and healthcare expenditure.

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Main Methods:

  • Review of existing studies on milk protein peptides (casokinins, lactokinins) and their effects on blood pressure.
  • Analysis of the mechanism involving inhibition of angiotensin-I-converting enzyme (ACE).
  • Examination of evidence from animal models (spontaneously hypertensive rats) and limited human trials.

Main Results:

  • Milk protein-derived peptides, specifically casokinins and lactokinins, demonstrate ACE inhibitory activity.
  • Studies in hypertensive rats show significant reductions in blood pressure.
  • Preliminary human studies indicate statistically significant hypotensive effects, lowering both systolic and diastolic pressures.

Conclusions:

  • Milk protein-derived peptides represent a promising functional food ingredient or nutraceutical for blood pressure management.
  • This natural approach has the potential to mitigate the risks and costs associated with hypertension and cardiovascular disease.
  • Further research and development could lead to significant global healthcare cost savings.