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Exploring the Biology of Aging: Unveiling the Secrets of Lifespan Dynamics

Delve into the progressive process of aging across organisms, from genes to environmental factors, and explore longevity mysteries. Discover aging theories, lifestyles' impacts, and research on model organisms' insights.

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Exploring the Biology of Aging: Unveiling the Secrets of Lifespan Dynamics

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  1. Biology of AgingA&S300-002 Jim Lund Class website: http://elegans.uky.edu/300

  2. What is the topic of this class? This class will not cover the sociology or psychology of old people or the the diseases of old age. This course will cover the aging process: how and why organisms age

  3. What is the topic of this class? What is aging if not the diseases of the old? Do all organisms age the same? How do lifespans vary among organisms? Why do animals age? Why do some people live to 100 but others die young? Can anything be done about aging?

  4. What is aging?

  5. What is aging?

  6. What is aging? Aging is a progressive process that converts a healthy, fit organism into a less healthy, less fit organism. Aging is a biological process Aging not disease, per se.

  7. What is aging? Aging is a process of general, irreversible, and progressive physical deterioration that occurs over time. Genes, Aging, and Immortality. Charlotte A. Spencer

  8. Why do animals age?

  9. Human lifespan demographics.

  10. Comparing lifespans among species

  11. Aging phenotypes Resistance to high oxygen levels declines with age

  12. Premature Aging (Progeria)

  13. Environmental effectsSun damage causes premature aging of the skin:

  14. Smoking->premature aging

  15. Smoking->premature aging

  16. Universality of aging Human Mouse Worm Yeast

  17. Aging junk science • Monkey glands • Human growth hormone • DHEA • Supplements • Oxygen chambers • “Purification”

  18. Centenarians: what have we learned from studying them?

  19. What we’ve learned from model organisms Hekimi and Leonard Guarente, 2003

  20. Aging Theories • Telomeres • Free Radicals (molecules with unpaired electrons) • Accumulated damage theory • Evolutionary aging theory • Aging is still poorly understood!

  21. What can be done about aging? • Today, very little can be done! • Healthy lifestyle • Avoid premature aging • Prevent diseases of aging • Caloric restriction?

  22. A&S300-002: Biology of Aging Class web site: http://elegans.uky.edu/300 Instructor: Jim Lund jiml@uky.edu, 7-1034 311 Morgan Building Office hours: 10-11 am Fri and after class There is no required textbook. Readings will be made available on the class website.

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