Cell Membrane

Publication Title: 
Integrative and Comparative Biology

More than 100 years ago, Max Rubner combined the fact that both metabolic rate and longevity of mammals varies with body size to calculate that "life energy potential" (lifetime energy turnover per kilogram) was relatively constant. This calculation linked longevity to aerobic metabolism which in turn led to the "rate-of-living" and ultimately the "oxidative stress" theories of aging. However, the link between metabolic rate and longevity is imperfect.

Author(s): 
Hulbert, A. J.
Publication Title: 
Integrative and Comparative Biology

More than 100 years ago, Max Rubner combined the fact that both metabolic rate and longevity of mammals varies with body size to calculate that "life energy potential" (lifetime energy turnover per kilogram) was relatively constant. This calculation linked longevity to aerobic metabolism which in turn led to the "rate-of-living" and ultimately the "oxidative stress" theories of aging. However, the link between metabolic rate and longevity is imperfect.

Author(s): 
Hulbert, A. J.
Publication Title: 
PloS One

Stem cells are increasingly the focus of translational research as well as having emerging roles in human cellular therapy. To support these uses there is a need for improved methods for in vivo cell localization and tracking. In this study, we examined the effects of cell labeling on the in vitro functionality of human adipose-derived mesenchymal stem cells. Our results provide a basis for future in vivo studies investigating implanted cell fate and longevity.

Author(s): 
Blaber, Sinead P.
Hill, Cameron J.
Webster, Rebecca A.
Say, Jana M.
Brown, Louise J.
Wang, Shih-Chang
Vesey, Graham
Herbert, Benjamin Ross
Publication Title: 
Drugs of Today (Barcelona, Spain: 1998)

Cystic fibrosis (CF) is a life-shortening disorder that affects over 30,000 people in the U.S. and 70,000 worldwide. CF is caused by mutations in the CFTR gene, which codes for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. CFTR is a chloride and bicarbonate channel and regulates several ion transporters at the epithelial cell membrane, controlling hydration or ionic composition of epithelial secretions. Management of CF is currently supportive, but recent advances in drug development have focused on therapies that assist mutant CFTR function.

Author(s): 
McPhail, G. L.
Clancy, J. P.
Publication Title: 
Molecular Neurodegeneration

Most neurons are born with the potential to live for the entire lifespan of the organism. In addition, neurons are highly polarized cells with often long axons, extensively branched dendritic trees and many synaptic contacts. Longevity together with morphological complexity results in a formidable challenge to maintain synapses healthy and functional. This challenge is often evoked to explain adult-onset degeneration in numerous neurodegenerative disorders that result from otherwise divergent causes.

Author(s): 
Bezprozvanny, Ilya
Hiesinger, Peter Robin
Publication Title: 
Annals of the New York Academy of Sciences

Hardly an aspect of aging is more important than an organism's ability to withstand stress or to resist both internally and externally imposed insults. We know that as organisms loose their ability to resist these insults, aged organisms suffer more than the young. Therefore, a prime strategy for an organism's survival has been the evolutionarily adapted defense systems that guard against insult. For better survivability, an organism's defense system must be maximized to its full effect through well-coordinated networks of diverse biologically responsive elements.

Author(s): 
Yu, B. P.
Chung, H. Y.
Publication Title: 
The International Journal of Biochemistry & Cell Biology

Calorie-restricted feeding retards the rate of ageing in mammalian and invertebrate species. The molecular mechanisms underlying this effect include a lower rate of accrual of tissue oxidative damage that is associated with a significantly lower rate of mitochondrial free radical generation in rodent species. To identify the important sites of control and regulation for mitochondrial free radical generation during ageing and calorie-restricted feeding, metabolic control analysis is being applied to the study of mitochondrial bioenergetics.

Author(s): 
Merry, B. J.
Publication Title: 
Annals of the New York Academy of Sciences

It is clear that aging results in alterations of endocrine physiology, which in turn appear to contribute to development of the senescent phenotype. How the underlying basic aging process or processes cause the endocrine cell dysfunctions leading to hormone imbalance is far from clear, but oxidative alteration of cell membranes is an attractive candidate mechanism that might be susceptible to some degree of global remediation.

Author(s): 
Harman, S. Mitchell
Publication Title: 
Experimental Gerontology

Cellular senescence is a biological process associated with aging and longevity. Successful aging is believed to be related to the ability to cope with different environmental stresses. The objective of this study was to investigate if cellular senescence is associated with platelet membrane modifications on subjects of different age, in particular on monozygotic twins and if these changes might be affected by both genetic components and environmental factors. The work was performed on 81 monozygotic twin pairs of different age.

Author(s): 
Nanetti, Laura
Laura, Nanetti
Moroni, Cinzia
Cinzia, Moroni
Vignini, Arianna
Arianna, Vignini
Vannini, Patrizia
Patrizia, Vannini
Franceschi, Claudio
Claudio, Franceschi
Mazzanti, Laura
Laura, Mazzanti
Publication Title: 
Integrative and Comparative Biology

More than 100 years ago, Max Rubner combined the fact that both metabolic rate and longevity of mammals varies with body size to calculate that "life energy potential" (lifetime energy turnover per kilogram) was relatively constant. This calculation linked longevity to aerobic metabolism which in turn led to the "rate-of-living" and ultimately the "oxidative stress" theories of aging. However, the link between metabolic rate and longevity is imperfect.

Author(s): 
Hulbert, A. J.

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