From a glucocentric to a lipocentric approach towards metabolic syndrome
2008
Insulin resistance, the essential component of metabolic syndrome, has traditionally been defined from a glucocentric viewpoint, with glucotoxicity playing a lead role. However, as overabundant circulating fatty acids are now known to be overt contributors, there is a paradigm shift in the understanding of metabolic syndrome acknowledging the importance of lipotoxicity as a major perpetuator of insulin resistance. Ectopic accumulation of fat in liver, adipose, muscle and pancreatic islets, provokes insulin resistance through various mechanisms. Chronic inflammation/adipocytokine generation, endoplasmic reticulum stress and mitochondrial dysfunction/oxidative stress also contribute significantly towards insulin resistance. Targets that can act as counter regulators/master switches at the converging point of all these metabolic pathways are currently under intense development.
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