Imaging mass spectrometry demonstrates age-related decline in human adipose plasticity.
JCI Insight
; 2(5): e90349, 2017 03 09.
Article
en En
| MEDLINE
| ID: mdl-28289709
ABSTRACT
Quantification of stable isotope tracers has revealed the dynamic state of living tissues. A new form of imaging mass spectrometry quantifies isotope ratios in domains much smaller than a cubic micron, enabling measurement of cell turnover and metabolism with stable isotope tracers at the single-cell level with a methodology we refer to as multi-isotope imaging mass spectrometry. In a first-in-human study, we utilize stable isotope tracers of DNA synthesis and de novo lipogenesis to prospectively measure cell birth and adipocyte lipid turnover. In a study of healthy adults, we elucidate an age-dependent decline in new adipocyte generation and adipocyte lipid turnover. A linear regression model suggests that the aging effect could be mediated by a decline in insulin-like growth factor-1 (IGF-1). This study therefore establishes a method for measurement of cell turnover and metabolism in humans with subcellular resolution while implicating the growth hormone/IGF-1 axis in adipose tissue aging.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Espectrometría de Masas
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Envejecimiento
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Grasa Subcutánea
Tipo de estudio:
Prognostic_studies
Límite:
Adult
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
JCI Insight
Año:
2017
Tipo del documento:
Article
País de afiliación:
Estados Unidos