Back to Search
Start Over
Kinetic analysis of D-Alanine upon oral intake in humans.
- Source :
-
Amino Acids . 10/14/2024, Vol. 56 Issue 1, p1-8. 8p. - Publication Year :
- 2024
-
Abstract
- D-Alanine, a rare enantiomer of alanine, can potentially alleviate the worsening of viral infections and maintain circadian rhythm. This study aimed to analyze the kinetics of D-Alanine upon oral intake. Five healthy volunteers were administered D-Alanine as a single oral dose at 11,236 or 33,708 µmoL (1–3 g). Upon intake of the lower dose, the plasma level of D-Alanine reached its peak concentration of 588.4 ± 40.9 µM with a peak time of 0.60 ± 0.06 h. The compartment model estimated the clearance of D-Alanine at 12.5 ± 0.3 L/h, or 208 ± 5 mL/min, distribution volume of 8.3 ± 0.7 L and half-life of 0.46 ± 0.04 h, suggesting a rapid clearance of D-Alanine. The peak concentration and area under the curve increased proportionally upon intake of the higher dose, while the clearance, distribution volume and half-life did not. The urinary ratio of D-Alanine per sum of D- and L-Alanine reached its peak of nearly 100%, followed by a slow decline. The peak time of the urinary ratio was 1.15 ± 0.15 h, showing a time lag of blood to urine excretion. Fractional excretion, a ratio of the clearance of a substance per a standard molecule in kidney, of D-Alanine increased from 14.0 ± 5.8% to 64.5 ± 10.3%; the latter corresponded to the urinary clearance of D-Alanine as about 77 mL/min for an adult, with a peak time of 1.90 ± 0.56 h. D-Alanine was quickly absorbed and appeared in blood, followed by urinary excretion. This kinetic analysis increases our fundamental knowledge of the oral intake of D-Alanine for the chronic dosing. Trial number: #UMIN000050865. Date of registration: 2023/6/30. [ABSTRACT FROM AUTHOR]
- Subjects :
- *VIRUS diseases
*CIRCADIAN rhythms
*EXCRETION
*ALANINE
*VOLUNTEERS
Subjects
Details
- Language :
- English
- ISSN :
- 09394451
- Volume :
- 56
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Amino Acids
- Publication Type :
- Academic Journal
- Accession number :
- 180252428
- Full Text :
- https://doi.org/10.1007/s00726-024-03421-6