Radioisotope-based and mass spectrometry coupled to chromatographic techniques are the conventional methods for monitoring HMG-CoA reductase (HMGR) activity. Irrespective of offering adequate sensitivity, these methods are often cumbersome and time-consuming, requiring the handling of radiolabeled chemicals or elaborate ad-hoc derivatizing procedures. We propose a rapid and versatile reverse phase-HPLC method for assaying HMGR activity capable of monitoring the levels of both substrates (HMG-CoA and NADPH) and products (CoA, mevalonate, and NADP(+)) in a single 20 min run with no pretreatment required. The linear dynamic range was 10-26 pmol for HMG-CoA, 7-27 nmol for NADPH, 0.5-40 pmol for CoA and mevalonate, and 2-27 nmol for NADP(+), and limit of detection values were 2.67 pmol, 2.77 nmol, 0.27 pmol, and 1.3 nmol, respectively.

Rapid reverse phase-HPLC assay of HMG-CoA reductase activity.

MOZZICAFREDDO, MATTEO;CUCCIOLONI, Massimiliano;ELEUTERI, Anna Maria;ANGELETTI, Mauro
2010-01-01

Abstract

Radioisotope-based and mass spectrometry coupled to chromatographic techniques are the conventional methods for monitoring HMG-CoA reductase (HMGR) activity. Irrespective of offering adequate sensitivity, these methods are often cumbersome and time-consuming, requiring the handling of radiolabeled chemicals or elaborate ad-hoc derivatizing procedures. We propose a rapid and versatile reverse phase-HPLC method for assaying HMGR activity capable of monitoring the levels of both substrates (HMG-CoA and NADPH) and products (CoA, mevalonate, and NADP(+)) in a single 20 min run with no pretreatment required. The linear dynamic range was 10-26 pmol for HMG-CoA, 7-27 nmol for NADPH, 0.5-40 pmol for CoA and mevalonate, and 2-27 nmol for NADP(+), and limit of detection values were 2.67 pmol, 2.77 nmol, 0.27 pmol, and 1.3 nmol, respectively.
2010
262
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11581/204234
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