Advantages of formate dehydrogenase reaction for efficient NAD
+ quantification in biological samples.
Anal Biochem 2020;
603:113797. [PMID:
32562604 DOI:
10.1016/j.ab.2020.113797]
[Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 05/21/2020] [Accepted: 05/24/2020] [Indexed: 02/07/2023]
Abstract
The medical significance of NAD+-dependent metabolic regulation acquires increasing attention, demanding rapid and clinically feasible quantification of NAD+ in complex biological samples. Here we describe the usage of formate dehydrogenase for a straightforward and highly specific fluorometric assay of NAD+ in tissue extracts, not requiring chromatographic separation of nucleotides. The assay employs the irreversible reaction of formate oxidation coupled to NAD+ reduction, catalyzed by the enzyme which has high affinity and specificity to NAD+, and is stable under a variety of conditions. The assay reliably quantifies NAD+ in the methanol extracts of the rat brain cortex and mitochondria.
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