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How intermittent fasting helps prevent diseases


Washington: Intermittent fasting works wonders for overall health, particularly for the liver, as it inhibits the secretion of a protein that regulates a large number of liver genes, new research has found. The findings will help develop new interventions to lower disease risk and discover the optimum intervals for fasting.

In experiments with mice, researchers led by Dr Mark Larance at the University of Sydney identified how fasting on alternate days affected proteins in the liver, showing the unexpected impact on fatty acid metabolism and the surprising role played by a master regulator protein that controls many biological pathways in the liver and other organs.

According to Dr Larance, a Cancer Institute of NSW Future Research Fellow in the Charles Perkins Centre and School of Life and Environmental Sciences at the University of Sydney, “We know that fasting can be an effective intervention to treat disease and improve liver health. But we haven’t known how fasting reprogrammes liver proteins, which perform a diverse array of essential metabolic functions.”

“By studying the impact on proteins in the livers of mice, which are suitable human biological models, we now have a much better understanding of how this happens.”

In particular, the researchers found that the HNF4-(alpha) protein, which regulates a large number of liver genes, plays a previously unknown role during intermittent fasting.

“For the first time, we showed that HNF4-(alpha) is inhibited during intermittent fasting. This has downstream consequences, such as lowering the abundance of blood proteins in inflammation or affecting bile synthesis. This helps explain some of the previously known facts about intermittent fasting,” Dr Larance said.


The researchers also found that every-other-day-fasting — where no food was consumed on alternate days — changed the metabolism of fatty acids in the liver, knowledge that could be applied to improvements in glucose tolerance and the regulation of diabetes.

“What’s really exciting is that this new knowledge about the role of HNF4-(alpha) means it could be possible to mimic some of the effects of intermittent fasting through the development of liver-specific HNF4-(alpha) regulators,” Dr Larance said.

Dr Larance said that the information can now be used in future studies to determine optimum fasting periods to regulate protein response in the liver.

“Last year we published research into the impact of every-other-day-fasting on humans. Using this data, we can now build up improved models of fasting for better human health.”

The results of the research were published in the journal Cell Reports.

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