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COMPLEX TIME: Adaptation, Aging, & Arrow of Time

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Difference between revisions of "Dynamic Multi-System Resilience in Human Aging/Emergence of Aging in Natural and Synthetic Multicellular Structures"

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|Pre-meeting notes=Many simple organisms such as ferns, hydra or jellyfish do not age. Their mortality rates remain approximately constant at all ages. In contrast, complex organisms typically have a probability of deathm(t) that increases with age, t. Furthermore, the functional form of m(t) for many different organisms show a remarkable degree of similarity. The difference between simple and complex organisms, and the universality of aging patterns among complex organisms strongly suggest that aging is an emergent phenomenon that depends not on the individual properties of biological building blocks,but rather, on the interactions between them. Indeed, we die not because we slowly run out of live cells, but because of systemic failures that manifest in complex organs. In this talk I will present a quantitative theory of aging based on evolutionary and mechanical arguments, and show how aging appears as an emergent phenomenon as one moves across the scale of complexity, from large molecules and cells, to tissues and organs. I will particularly focus on aging in synthetic tissues, since this is the simplest structure that admits controlled experimental observation of emergent systemic damage.
 
|Pre-meeting notes=Many simple organisms such as ferns, hydra or jellyfish do not age. Their mortality rates remain approximately constant at all ages. In contrast, complex organisms typically have a probability of deathm(t) that increases with age, t. Furthermore, the functional form of m(t) for many different organisms show a remarkable degree of similarity. The difference between simple and complex organisms, and the universality of aging patterns among complex organisms strongly suggest that aging is an emergent phenomenon that depends not on the individual properties of biological building blocks,but rather, on the interactions between them. Indeed, we die not because we slowly run out of live cells, but because of systemic failures that manifest in complex organs. In this talk I will present a quantitative theory of aging based on evolutionary and mechanical arguments, and show how aging appears as an emergent phenomenon as one moves across the scale of complexity, from large molecules and cells, to tissues and organs. I will particularly focus on aging in synthetic tissues, since this is the simplest structure that admits controlled experimental observation of emergent systemic damage.
 
|Post-meeting notes=Noteworthy concepts and questions:
 
|Post-meeting notes=Noteworthy concepts and questions:
# "Gerontropy". In additional to directional changes in health indicators do we get an increase in variance
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# Ravi: "Gerontropy". In additional to directional changes in health indicators do we get an increase in variance
 
# Multiscale approaches. Do multiple length and time scales really matter when they are separated? Can interdependence network approach be improved to take into account hierarchical structures of organs/tissues/cells/molecules.
 
# Multiscale approaches. Do multiple length and time scales really matter when they are separated? Can interdependence network approach be improved to take into account hierarchical structures of organs/tissues/cells/molecules.
 +
# Ravi, Chhanda: How can theorists make themselves useful for NIH? How to communicate "theoretically driven" to NIH.
 +
# Chhanda: Resilience builds up over time. Effect of early life history on aging.
 
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Revision as of 17:40, November 12, 2018

November 12, 2018
10:00 am - 10:40 am

Presenter

Dervis Can Vural (Univ. Notre Dame)

Abstract

Many simple organisms such as ferns, hydra or jellyfish do not age. Their mortality rates remain approximately constant at all ages. In contrast, complex organisms typically have a probability of deathm(t) that increases with age, t. Furthermore, the functional form of m(t) for many different organisms show a remarkable degree of similarity. The difference between simple and complex organisms, and the universality of aging patterns among complex organisms strongly suggest that aging is an emergent phenomenon that depends not on the individual properties of biological building blocks,but rather, on the interactions between them. Indeed, we die not because we slowly run out of live cells, but because of systemic failures that manifest in complex organs. In this talk I will present a quantitative theory of aging based on evolutionary and mechanical arguments, and show how aging appears as an emergent phenomenon as one moves across the scale of complexity, from large molecules and cells, to tissues and organs. I will particularly focus on aging in synthetic tissues, since this is the simplest structure that admits controlled experimental observation of emergent systemic damage.

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