Cited by 71Muscle metabolism and nutritionFood and Agricultural SciencesAnimal Nutrition and Physiology

Phase of menstrual cycle affects lysine requirement in healthy women

Kriengsinyos, Wantanee, Wykes, Linda J., Goonewardene, Laksiri A., Ball, Ronald O., Pencharz, Paul B.·2004·American Journal of Physiology-Endocrinology and Metabolism

Abstract

The aim of this study was to investigate whether the phases of the menstrual cycle affect lysine requirement in healthy adult females, as determined by the indicator amino acid oxidation (IAAO) method. Five healthy females with regular menstrual cycles were studied at seven graded levels of lysine intake, in random order, with an oral [13 C]phenylalanine tracer protocol in both the follicular and luteal phases. A total of 14 studies were conducted for each subject. Breath and plasma samples were collected according to the standard IAAO protocol. Serum 17β-estradiol and progesterone concentrations were measured on each IAAO study day. The rate of release of 13 CO 2 from [13 C]phenylalanine oxidation (F 13 CO 2) was measured, and a two-phase linear regression crossover model was applied to determine lysine requirement. F 13 CO 2 was higher during the luteal phase ( P < 0.001) and was positively associated with serum concentrations of 17β-estradiol and progesterone. The F 13 CO 2 data were adjusted for subjects and sex hormones and used to define breakpoints for lysine requirements. The lysine requirement of healthy females in the luteal phase was 37.7 mg·kg−1·day−1 and higher ( P = 0.025) than that of females in the follicular phase (35.0 mg·kg−1·day−1). At all lysine intake levels, plasma amino acids were lower and phenylalanine oxidation was higher in the luteal relative to the follicular phase. Therefore, we reason that the higher lysine requirement observed in the luteal phase is probably due to higher amino acid catabolism.

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Crossref · 10.1152/ajpendo.00262.2003

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Authors
Kriengsinyos, W., Wykes, L. J., Goonewardene, L. A., Ball, R. O., & Pencharz, P. B.
Affiliations
University of Toronto (CA)
Venue
American Journal of Physiology-Endocrinology and Metabolism
Published
2004-09
Volume
287
Issue
3
Pages
E489-E496
ISSN
  • 0193-1849 (ISSN-L)
  • 1522-1555
OpenAlex
W2005564128
Cited by
71
References
48
Citations by year
2026: 3 · 2025: 6 · 2024: 6 · 2023: 6 · 2022: 4 · 2021: 7 · 2020: 4 · 2019: 8 · 2018: 5 · 2017: 3 · 2016: 2 · 2014: 2 · 2013: 5
FWCI
0.64
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Physiology-Endocrinology and Metabolism (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Food and Agricultural Sciences
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Nutrition and Physiology
Keywords
menstrual cycle, lysine requirement, luteal phase, follicular phase, amino acid oxidation, phenylalanine oxidation, 13C tracer, estradiol, progesterone, amino acid catabolism
MeSH terms
Adult, Amino Acids, Breath Tests, Carbon Isotopes, Estradiol, Female, Fluorine, Follicular Phase, Humans, Luteal Phase, Lysine, Nutritional Requirements, Oxidation-Reduction, Phenylalanine, Progesterone, Reference Values, Linear Models

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