Expert in hormesis Edward Calabrese discusses the significance of hormesis in biology and medicine. They explore topics such as the beneficial effects of low-level stress, the co-evolution of plants and herbivores, hormesis and longevity, and the forces against healthy habits and prevention. They also touch on the positive effects of exercise on mood and well-being, personal nutrition and supplements, and the exploration of toxins in plants.
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question_answer ANECDOTE
Accidental Discovery of Hormesis
Edward Calabrese discovered low dose stimulation in peppermint plants by accident during his undergraduate thesis.
He rigorously replicated studies over years, finding modest stimulation effects at low doses and inhibition at high doses.
question_answer ANECDOTE
Unexpected Neuron Protection by Cytokines
Mark Mattson and his postdoc found pro-inflammatory cytokines could protect neurons at low doses, contrary to expectations.
Their work faced publication challenges but was eventually validated in other fields showing NF Kappa B promotes neuron survival.
insights INSIGHT
Lifespan Extension via Hormesis
Most chemicals extending lifespan in nematodes do so modestly with hormetic dose responses.
Lifespan extension is constrained by biological plasticity, limiting maximum gains even with different agents.
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Professor Ed Calabrese has spent much of his life pouring over tens of thousands of dose – response data from studies in fields ranging from toxicology and radiation biology to cancer, neuroscience, and aging. His work has firmly established the hormesis principle as foundational for evolution and health. In the fields of biology and medicine hormesis is defined as an adaptive response of cells and organisms to a moderate (usually intermittent) stress. Examples include ischemic preconditioning, exercise, dietary energy restriction and exposures to low doses of certain phytochemicals. In this episode Ed and I have a far-reaching conversation on hormesis and its importance for basic neuroscience research, human health, and disease prevention and treatment.
LINKS:
Historical perspective on hormesis, toxicology and radiation biology:
Brain Ponderings podcast with Dr. Mark Mattson