Energy and Metabolism
This module introduces the foundations of metabolism and metabolic flux in the study of aging. Learners begin by examining how mice and rats differ in aging and metabolism. The course also considers how animal strain and sex can shape research outcomes. A second lecture explains how the body stores and mobilizes glucose and fat. Learners explore the cellular pathways that capture energy from these molecules. The course also introduces mTORC1 and AMPK, two key sensors that regulate cellular energy use. A final lecture explains metabolic flux, why dynamic measurements can be more informative than snapshots, and one approach for measuring flux. Learners conclude by examining protein turnover and how it may be targeted to support healthier aging.
Lecture 1: Preclinical Models and Methods for Studying Metabolic Flux
By the end of this lecture, learners will be able to:
- Understand how mice and rats differ regarding aging and metabolism
- Understand how strain impacts outcomes of aging and metabolism
- Understand how sex interacts with species and strain
Lecture 2: Core Energy Metabolism and Signaling
By the end of this lecture, learners will be able to:
- Understand storage and mobilization of glucose and fat (lipids)
- Learn cellular pathways to take up and harvest energy from these molecules
- Become familiar with two key intracellular energy sensors, mTORC1 and AMPK
Lecture 3: Metabolic Flux and Protein Metabolism
By the end of this lecture, learners will be able to:
- Understand the concept of metabolic flux
- Understand the limitations of snapshots compared to moving pictures
- Describe one approach for measuring flux
- Understand important factors in the flux (turnover) of protein
- Understand how to target protein turnover to slow aging
Joseph A. Baur, PhD
Professor, Department of Physiology, Institute for Diabetes, Obesity, and Metabolism
Director, Rodent Metabolic Phenotyping Core, Perelman School of Medicine, University of Pennsylvania
Joseph A. Baur, PhD, is a Professor in the Department of Physiology and the Institute for Diabetes, Obesity, and Metabolism, as well as Director of the Rodent Metabolic Phenotyping Core at the Perelman School of Medicine, University of Pennsylvania. His long-term interest is in the basic mechanisms that lead to aging, which is a critical risk factor for the major causes of morbidity and mortality in the western world, including cardiovascular disease, diabetes, cancer, and neurodegenerative disorders. After completing his undergraduate degree in Canada, he travelled to UT Southwestern in Dallas, Texas, to pursue his PhD studies on human telomere biology. For his postdoctoral studies, he moved to Harvard Medical School to study sirtuin enzymes, which use NAD+ to alter post-translational modifications and have been hypothesized to play a role in aging. The Baur lab is currently focused on the use of small molecules to understand and mimic the health-promoting effects of dietary manipulations in rodents, with a particular focus on nicotinamide adenine dinucleotide (NAD+) metabolism.
Benjamin Miller, PhD
G.T. Blankenship Chair in Aging Research and Department Chair of the Aging and Metabolism Research Program
Oklahoma Medical Research Foundation (OMRF)
Dr. Miller received a PhD from UC-Berkeley and completed a post-doc at the Muscle Research Center in Copenhagen, Denmark. He is currently G.T. Blankenship Chair in Aging Research and Department Chair of the Aging and Metabolism Research Program at the Oklahoma Medical Research Foundation (OMRF). Dr. Miller’s expertise is in skeletal muscle, aging, mitochondria, stable isotope labeling, proteostasis, and drug and lifestyle (primarily exercise) interventions. His work with tracers and in muscle aging is nationally recognized and has led to many collaborations, extensive mentoring, and leadership positions. Dr. Miller’s work is almost exclusively focused on prolonging the period spent in good health (i.e., healthspan) by targeting mitochondrial energetics and proteostatic maintenance. The Miller lab is truly translational, with studies spanning pre-clinical models, clinical trials, and back. The Miller lab has focused on training the next generation of scientists, and many from the lab have gone on to their own exceptional careers
Key:
The Supplemental Materials PDFs include additional resources, references, and information to support and enhance your learning.
- Cases/Discussion Questions
- Glossary of Terms
- References
Lecture 1: Preclinical Models and Methods for Studying Metabolic Flux
Download Lecture 1 Slides (PPT)
Download Lecture 1 Slides (PDF)
Download Lecture 1 Supplemental Materials
Lecture 2: Core Energy Metabolism and Signaling
Download Lecture 2 Slides (PPT)
Download Lecture 2 Slides (PDF)
Download Lecture 2 Supplemental Materials
Lecture 3: Metabolic Flux and Protein Metabolism
Download Lecture 3 Slides (PPT)
Download Lecture 3 Slides (PDF)
Download Lecture 3 Supplemental Materials