title: HPLC method for amino acids profile in biological fluids and inborn metabolic disorders of aminoacidopathies.
abstract: Quantification of total and individual amino acids in biological fluids such as plasma, urine and cerebrospinal fluid has an important diagnostic implication in laboratory medicine. The present paper describes protocols for the assay of total amino acids by modified method based on dinitrophenyl and HPLC profile involving pre-column derivatization with o-pthalaldehyde (OPA) derivatization, respectively. The method, based on the alkylation of-SH groups prior to OPA derivatization of amino acids followed by reverse phase high performance liquid chromatography, provide a comprehensive profile of more than twenty amino acids (including-SH group containing) in a single run lasting about 45 minutes. The present study, apart from establishing the normal profile of amino acids in plasma of Indian sub population, also presents HPLC profile for some of the rare amino acidopathies.
authors.affiliation: Clinical Biochemistry Unit, Department of Neurochemistry, National Institute of Mental Health and Neurosciences, 560029 Bangalore.
authors.forename: S V Suresh
authors.initials: SV
authors.lastname: Babu
authors.forename: M M
authors.initials: MM
authors.lastname: Shareef
authors.forename: A Pavan Kumar
authors.initials: AP
authors.lastname: Shetty
authors.forename: K Taranath
authors.initials: KT
authors.lastname: Shetty
keywords: Inborn metabolic disorders; O-pthaladehyde; amino acidopathies; amino acids profile; reverse phase HPLC