Metabolites: the key to treating Alzheimer's? - with Priyanka Joshi

The Royal Institution33 minutes read

Dr. Alois Alzheimer discovered Alzheimer's disease over a hundred years ago due to protein clumps in the brain, with efforts for a cure remaining futile. Recent drugs show promise, but protein misfolding leading to aggregation remains a key challenge in neurodegenerative diseases like Alzheimer's.

Insights

  • Misfolded proteins in diseases like Alzheimer's overwhelm the cell's clearance mechanisms, leading to aggregation in specific brain regions and subsequent cognitive decline.
  • Metabolites play a crucial role in influencing protein conformation and aggregation, with dysregulated metabolites found in neurodegeneration activating protein quality control mechanisms and specific metabolites like vitamin A and E maintaining solubility, highlighting the impact of metabolism on disease progression and potential therapeutic targets.

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Recent questions

  • What did Dr. Alois Alzheimer discover?

    Alzheimer's disease characterized by brain protein clumps.

  • How do misfolded proteins lead to diseases?

    Misfolded proteins can form aggregates, causing loss of function.

  • What role do metabolites play in protein conformation?

    Metabolites interact with proteins, influencing their conformation.

  • How do lifestyle factors influence protein aggregation?

    Lifestyle factors, genetics, and environment impact protein conformation.

  • What interventions are crucial for combating age-related diseases?

    Diet and movement-based interventions are essential for healthspan.

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Summary

00:00

"Alzheimer's Disease: Protein Misfolding and Aggregation"

  • Dr. Alois Alzheimer discovered Alzheimer's disease over a hundred years ago, characterized by protein clumps and plaques in the brain.
  • Despite efforts by scientists and pharmaceuticals, a cure for Alzheimer's remains elusive.
  • Recent drugs like Aducanumab and Lecanemab show some promise but are not fully successful.
  • Proteins are essential for cell functions, but misfolding can lead to diseases like Alzheimer's.
  • Proteins are made of amino acids and fold into specific structures crucial for their functions.
  • Protein folding starts from DNA, transcribed into mRNA, translated into proteins, and then folded.
  • Misfolded proteins can form aggregates, leading to loss of function and disease.
  • Protein quality control mechanisms in healthy cells prevent misfolding, but mutations or environmental changes can disrupt this balance.
  • In diseases like Alzheimer's, aggregated proteins overwhelm the cell's clearance mechanisms.
  • Aggregation of misfolded proteins begins in specific brain regions, leading to cognitive and motor decline in diseases like Alzheimer's and Parkinson's.

16:59

Metabolites Influence Protein Aggregation and Health

  • Protein aggregation can be caused by factors other than the protein itself, leading to the need to reverse this process.
  • Designing small drug-like molecules to bind to aggregates and slow down aggregation is a potential solution.
  • Concerns arise regarding the effectiveness of these molecules in human patients due to existing protein buildup.
  • The metabolome, consisting of small molecule metabolites, plays a crucial role in influencing proteins and their conformation.
  • Metabolites interact with proteins and the genome, affecting protein conformation and regulatory functions.
  • Metabolites may have a role in changing protein aggregation, inspired by observations in fishes adapting to different environments.
  • Lifestyle factors, genetics, and environmental interactions influence protein conformation and health outcomes.
  • Dysregulated metabolites found in neurodegeneration can activate protein quality control mechanisms to prevent aggregation.
  • Specific metabolites like vitamin A and E can have opposing effects on protein aggregation, maintaining solubility.
  • Endogenous metabolites can modulate protein aggregation, influencing protein structure and quality control mechanisms.

33:54

Aging, Metabolism, and Longevity: Key Insights

  • Metabolism changes due to aging, leading to protein aggregation and disruption in metabolism.
  • Aging is a significant risk factor for neurodegenerative diseases like Alzheimer's, Parkinson's, and ALS.
  • Aging causes loss of protein homeostasis and quality control, leading to increased insolublome.
  • Caloric restriction has been shown to increase lifespan in worms by affecting ribosomal biogenesis.
  • Exercise and movement impact mitochondrial biogenesis and metabolites, promoting longevity and healthspan.
  • Diet and movement-based interventions are crucial for combating age-related diseases.
  • Metabolite-inspired therapies target early mechanisms to prevent protein aggregation.
  • Longevity clinics focus on early biomarkers, including metabolites, to prevent age-related diseases.
  • The "Decade of Healthy Aging" emphasizes promoting healthy aging through lifestyle interventions.
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