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    MAY HER SOUL REST IN PEACE 🙏 Veteran entertainment columnist and talent manager Lolit Solis has passed away. She was 78 years old. https://tinyurl.com/6kumarkx | LatestChika.com – Facebook

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Nature’s Dieting Tip: Scientists Uncover Surprising Plasticity of the Gut

March 9, 2024
in Science
Nature’s Dieting Tip: Scientists Uncover Surprising Plasticity of the Gut
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Small Intestine

Research using fruit flies has revealed activin signaling as a key mechanism in gut plasticity, influencing its ability to shrink and expand in response to nutrient availability. This finding has implications for understanding organ adaptation and opens new pathways for exploring treatments for colorectal cancer linked to activin signaling disruptions.

One of the most striking examples of gut plasticity can be observed in animals that are exposed to prolonged periods of fasting, such as hibernating animals or phyton snakes that goes for months without eating, where the gut shrinks with as much as 50%, but recovers in size following a few days of re-feeding. Importantly, the capacity of the gut to undergo resizing is broadly conserved. Hence, in humans, an increase in gut size is observed during pregnancy, which facilitates the uptake of nutrients to support the growth of the fetus.

The Colombani Andersen lab at the section of Cell & Neurobiology, Department of Biology, University of Copenhagen uses the fruit fly, Drosophila, to study the mechanisms that regulate gut plasticity. The results have just been published in the scientific journal Nature Communications.

“Taking advantage of the broad genetic toolbox available in the fruit fly, we have investigated the mechanisms underpinning nutrient-dependent gut resizing,” says Dr. Ditte S. Andersen.

Mechanisms of Gut Resizing Discovered

The results show that nutrient deprivation results in an accumulation of progenitor cells that fail to differentiate into the mature cells causing the gut to shrink. Upon refeeding these stalled progenitor cells readily differentiate into mature cells to promote regrowth of the gut.

Ditte S. Andersen continues: “We have identified activins as critical regulators of this process. In nutrient-restrictive conditions, activin signaling is strongly repressed, while it is reactivated and required for progenitor maturation and gut resizing in response to refeeding. Activin-dependent resizing of the gut is physiologically important as inhibition of activin signaling reduces survival of flies to intermittent fasting.”

Regulators of organ plasticity are essential for host adaptation to an ever-changing environment, however, the same signals are often deregulated in cancers. Indeed, mutations affecting activin signaling are frequent in cancer cells in a variety of tissues. Our study provides a starting point for investigating the link between aberrant activin signaling and the development of colorectal cancers and sets the stage for exploring the efficiency of anti-activin therapeutic ­strategies in treating colorectal cancers.

Reference: “Drosophila activins adapt gut size to food intake and promote regenerative growth” by Christian F. Christensen, Quentin Laurichesse, Rihab Loudhaief, Julien Colombani and Ditte S. Andersen, 4 January 2024, Nature Communications.
DOI: 10.1038/s41467-023-44553-9

>>> Read full article>>>
Copyright for syndicated content belongs to the linked Source : SciTechDaily – https://scitechdaily.com/natures-dieting-tip-scientists-uncover-surprising-plasticity-of-the-gut/

Tags: DietingNature'sscience
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