A new discovery reveals that astrocytes, star-shaped cells in the brain, play a key role in regulating fat metabolism and obesity. These cells act on a cluster of neurons, known as the GABRA5 cluster, effectively acting as a “switch” for weight regulation.

The MAO-B enzyme in these astrocytes was identified as a target for obesity treatment, influencing GABA secretion and thus weight regulation.

KDS2010, a selective and reversible MAO-B inhibitor, successfully led to weight loss in obese mice without impacting their food intake, even while consuming a high-fat diet, and is now in Phase 1 clinical trials.

    • Umbrias@beehaw.org
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      1 year ago

      You just don’t digest as much nor store as much calories. So your feces and urine, as well as exhalation.

      It’s not cheating basic physics, there’s just a lot of misunderstanding about how weight works in biology. Cico is not what many people believe it to be.

      • Natanael@slrpnk.net
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        1 year ago

        Absorbed calories in spent calories out would be more accurate, but nobody wants to do the more complicated math.

        And some processes can technically be calorie neutral and still affect weight (like say how much water we hold)

    • TheChurn@kbin.social
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      1 year ago

      Believe it or not, what you swallow has almost nothing to do with your weight. The only place the body absorbs energy from food is in the intestines, and the brain controls that process.

      The digestive tract is a tube, open at both ends, through which food passes. The process of extracting energy from that food is complex and highly tunable: the brain controls the production and secretion of hundreds of enzymes and other chemicals, as well as the physical action of the muscles lining the tube.

      The ‘basic physics’ here begins at the intestinal wall, not the mouth.

      • Hardeehar@lemm.ee
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        1 year ago

        I mean technically, if it’s a tube, the mouth is part of the basic physics brain process. As in, if you don’t eat it, it won’t be added to the calories. The decision to eat is a brain process, too.

        We’ve got drugs that play with that decision.

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          1 year ago

          Unless you don’t eat at all, the decision to eat is secondary to the decision to absorb energy from it.

          For example, I’ve been eating a “healthy diet” with about the same amount of exercise, for the last 3 years: first it kept my weight steady, then I lost 70 pounds in 3 months, then gained 10.

          The only difference: stress levels.

          People have been congratulating me for losing weight getting stressed out of my mind to the point of almost going crazy and killing myself. Thanks, but I was better before.

          • StringTheory@beehaw.org
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            1 year ago

            I gained a lot of weight while I had cancer but before I was diagnosed, probably from the physiological stress the cancer was putting on me. My eating patterns were unchanged. Then I gained still more during chemo even though it was hard to eat, probably from the steroids being pumped into me. Lost 60 lbs after treatment even though I was eating much more every day at that point.

            Bodies are weird, man!

        • jhulten@infosec.pub
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          1 year ago

          It’s also easy easier to discriminate against far people if you can define it as a moral failure of just not putting food in your gob.

      • forestG@beehaw.org
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        1 year ago

        Believe it or not, what you swallow has almost nothing to do with your weight. The only place the body absorbs energy from food is in the intestines, and the brain controls that process.

        I would believe it if I started gaining weight by just breathing. Also, no. Not the only place. Part of the alcohol consumed is absorbed through the stomach.

        The digestive tract is a tube, open at both ends, through which food passes. The process of extracting energy from that food is complex and highly tunable: the brain controls the production and secretion of hundreds of enzymes and other chemicals, as well as the physical action of the muscles lining the tube.

        The brain controls pretty much everything, and this everything is highly tunable. I mean, how else would well adjusted people adapt to the highly complex lives they live as adults? With commercial pills?

    • jeremy@midwest.social
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      1 year ago

      I’m guessing the switch they’re discussing affects the tendency of the body to store excess energy instead of just passing it thru. That is: if you don’t pack it on, you push it out. If you know what I mean…

    • ParsnipWitch@feddit.de
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      1 year ago

      The digestive process is much more complicated than basic physics. There are all kinds of processes happening, some of them not yet understood, that regulate your appetite, weight gain, energy, etc. It’s different in each individual and for each individual it can change through various external factors.

    • Natanael@slrpnk.net
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      1 year ago

      Look up nutrient bioavailability, which can vary between individuals.

      The body can choose to absorb more or less (and the brain have no conscious control) by regulating absorption differently. This regulation is typically used to keep your levels of nutrients steady (some stuff we eat would be deadly in the doses we eat them if it weren’t for the fact that the body can simply dump most of the particular substance until we’re running low)