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Josh Rabinowitz is a Professor of Chemistry and Integrative Genomics at Princeton University, where his research focuses on developing a quantitative, comprehensive understanding of cellular metabolism through the study of metabolites and their fluxes. In this episode, Josh focuses the discussion on three main topics: metabolomics, NAD (and its precursors), and cancer metabolism. The metabolomics discussion starts with a broad definition of metabolism, metabolites, and fluxomics before diving deep into glucose metabolism, lactate as a fuel, movement of lactate, and the regulation of these substrates. He then gives a detailed explanation of the electron transport chain and Krebs cycle and their implications with respect to both drugs and nutrition while also explaining how NAD is central to the process of energy generation. He then discusses the age-related decline in NAD and what current literature says about efforts to increase NAD through intravenous or oral supplementation with the precursors NMN and NR, including whether doing so provides any advantage to lifespan or healthspan. Finally, Josh ends the conversation talking about cancer metabolism and how one particular intersection between cancer metabolism and immunotherapy might provide a hopeful outlook on the future of cancer treatment.
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