title: Cation exchange HPLC analysis of desmosines in elastin hydrolysates.
abstract: Desmosine crosslinks are responsible for the elastic properties of connective tissues in lungs and cardiovascular system and are often compromised in disease states. We developed a new, fast, and simple cation exchange HPLC assay for the analysis of desmosine and isodesmosine in animal elastin. The method was validated by determining linearity, accuracy, precision, and desmosines stability and was applied to measure levels of desmosines in porcine and murine organs. The detection and quantification limits were 2 and 4 pmol, respectively. The run-time was 8 min. Our cation exchange column does not separate desmosine and isodesmosine, but their level can be quantified from absorbance at different wavelengths. Using this assay, we found that desmosines levels were significantly lower in elastin isolated from various organs of immunodeficient severe combined immunodeficiency mice compared with wild-type animals. We also found that desmosines levels were lower in lung elastin isolated from hyperhomocysteinemic Pcft(-/-) mice deficient in intestinal folate transport compared with wild-type Pcft(+/+) animals.
authors: Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, 60-637 Poznań, Poland. kajan@up.poznan.pl
authors: Joanna
authors: J
authors: Perła-Kaján
authors: Agnieszka
authors: A
authors: Gryszczyńska
authors: Sebastian
authors: S
authors: Mielcarek
authors: Hieronim
authors: H
authors: Jakubowski
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000191:economics / Q000379:methods*; D002852:Chromatography, Ion Exchange / Q000191:economics / Q000379:methods*; D003895:Desmosine / Q000032:analysis*; D004549:Elastin / Q000737:chemistry*; D020138:Hyperhomocysteinemia / Q000378:metabolism; D007524:Isodesmosine / Q000032:analysis*; D057230:Limit of Detection; D008168:Lung / Q000737:chemistry; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D016513:Mice, SCID; D016511:Severe Combined Immunodeficiency / Q000378:metabolism; D013552:Swine; D013997:Time Factors
chemical_list: D003895:Desmosine; D004549:Elastin; D007524:Isodesmosine