6-Hydroxy-5-methoxyindole-2-carboxylic acid in normal human urine

Area of Science:

• Biochemistry
• Analytical Chemistry
• Human Physiology

Background:

• Indole derivatives are crucial in biological systems.
• Understanding human urinary metabolites aids in health assessment.
• 6-hydroxy-5-methoxyindole-2-carboxylic acid (6H5MI-2-C) is a potential biomarker.

Purpose of the Study:

• To confirm the presence of 6H5MI-2-C in normal human urine.
• To develop a precise method for quantifying 6H5MI-2-C levels.
• To establish baseline urinary concentrations of 6H5MI-2-C in healthy adults.

Main Methods:

• Mass spectrometry was used to identify 6H5MI-2-C.
• High-performance liquid chromatography (HPLC) with fluorometric detection was employed for quantification.
• Urinary samples from normal subjects were analyzed.

Main Results:

• The presence of 6H5MI-2-C was definitively established in normal human urine.
• A validated HPLC method allowed for accurate determination of 6H5MI-2-C.
• The mean urinary concentration of 6H5MI-2-C was found to be 38 µmol/mol of creatinine, with a range of 6-76 µmol/mol.

Conclusions:

• 6H5MI-2-C is a naturally occurring compound in human urine.
• The developed HPLC method provides a reliable tool for measuring 6H5MI-2-C.
• Established reference ranges for 6H5MI-2-C can aid future clinical and research applications.