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Updated: Jul 15, 2026

Differentiated Mouse Adipocytes in Primary Culture: A Model of Insulin Resistance
Published on: February 17, 2023
Insulin resistance, glycemic control and adiposity: key determinants of healthy lifespan
Peter S DiStefano1, Rory Curtis, Bradley J Geddes
1Elixir Pharmaceuticals, Inc., 12 Emily Street, Cambridge, MA 02139, USA. pdistefano@elixirpharm.com
Abstract:
Identification of genes and pathways that alter lifespan has allowed for new insights into factors that control the aging process as well as disease. While strong molecular links exist between aging and metabolism, we hypothesize that targeting the mechanisms involved in aging will also give rise to therapeutics that treat other devastating age-related diseases, such as neurodegeneration, cancer, inflammation and cardiovascular disease. Insulin sensitivity, glycemic control and adiposity are not only hallmarks of the major metabolic diseases, type 2 diabetes and obesity, but they also represent significant risk factors for the development of Alzheimer's Disease and cognitive impairment. Insulin/IGF-1 signaling is an important pathway regulating aging and disease in a variety of species, including mammals. Here we describe an important role for the gut-derived peptide ghrelin in upstream signaling through the insulin/IGF-1 pathway and exemplify modulation of ghrelin signaling as an approach to mechanistic treatment of multiple age-related diseases by virtue of its ability to regulate key metabolic functions.
Insights
Targeting aging mechanisms via ghrelin signaling offers new therapeutic approaches for age-related diseases. This study highlights ghrelin
Area of Science:
- Aging and Metabolism
- Neurodegenerative Diseases
- Molecular Biology
Background:
- Aging shares molecular links with metabolic dysfunction.
- Metabolic health (insulin sensitivity, glycemic control, adiposity) impacts age-related diseases like Alzheimer's.
- Insulin/IGF-1 signaling is a key regulator of aging and disease across species.
Purpose of the Study:
- To investigate the role of ghrelin in the insulin/IGF-1 signaling pathway.
- To explore ghrelin signaling modulation as a therapeutic strategy for age-related diseases.
Main Methods:
- Investigated the upstream signaling role of ghrelin.
- Examined ghrelin's influence on key metabolic functions.
- Explored modulation of ghrelin signaling pathways.
Main Results:
- Identified ghrelin as a crucial upstream regulator of insulin/IGF-1 signaling.
- Demonstrated ghrelin's ability to modulate key metabolic functions.
- Established ghrelin signaling as a potential target for mechanistic treatment.
Conclusions:
- Ghrelin plays a significant role in the insulin/IGF-1 pathway.
- Modulating ghrelin signaling presents a novel therapeutic avenue for multiple age-related conditions.
- Targeting ghrelin offers a unified approach to treating metabolic dysfunction and associated diseases.
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