High-performance liquid chromatographic quantification of allysine as bis-p-cresol derivative in elastin

Amino Acids
H UmedaK Suyama

Abstract

The first step in normal cross-linking in elastin is the formation of alpha-aminoadipic-delta-semialdehyde, allysine, through oxidative deamination of specific peptidyl lysine by the enzyme lysyl oxidase (EC 1.4.3.13). For the analysis of allysine, allysine was derivatized with p-cresol. The derivatization was carried out by acid hydrolysis (6N HCl containing 5% (w/v) p-cresol at 110 degrees C for 48 h) accompanied with the hydrolysis of elastin. A bis-p-cresol derivative of allysine was isolated from bovine ligamentum nuchae elastin hydrolysates, and was characterized by UV, FAB-MS and NMR. This derivative was identified as 2-amino-6,6-bis(2-hydroxy-5-methylphenyl)hexanoic acid. A rapid, sensitive reverse-phase high-performance liquid chromatographic method with UV detection was developed for the quantitative determination of allysine as its bis-p-cresol derivative. The lower limit of detection of the bis-p-cresol derivative was 58 pmol in the standard sample with a 20-microl injection at a signal-to-noise ratio of 3. This method was applied to the determination of allysine in bovine ligamentum nuchae, aorta, lung, and rat aorta elastin. The allysine content in rat aorta elastin dramatically increased from 1 week to 2 weeks of...Continue Reading

Citations

Sep 13, 2013·The Journal of Toxicological Sciences·Takafumi MutoTakashi Hirota
Jul 6, 2017·Angewandte Chemie·Philip A WaghornPeter Caravan

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