August 23rd, 2024

Molecule restores cognition and memory in Alzheimer's disease mouse study

UCLA Health researchers synthesized DDL-920, a molecule that restores cognitive functions in Alzheimer’s model mice by enhancing gamma oscillations, differing from existing treatments. Further human studies are needed.

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Molecule restores cognition and memory in Alzheimer's disease mouse study

UCLA Health researchers have identified and synthesized a molecule, DDL-920, that shows promise in restoring cognitive functions in mice exhibiting symptoms of Alzheimer’s disease. The study, published in the Proceedings of the National Academy of Sciences, demonstrated that DDL-920 effectively jump-started the brain's memory circuitry, allowing Alzheimer’s model mice to recall escape routes in a maze at rates comparable to healthy mice. Unlike existing FDA-approved Alzheimer’s treatments that primarily focus on removing harmful plaques, DDL-920 aims to enhance gamma oscillations in the brain, which are crucial for memory and cognitive functions. The compound works by antagonizing certain receptors in fast-firing neurons, thereby enabling these neurons to sustain more powerful gamma oscillations. While the results in mice are promising, researchers caution that further studies are necessary to evaluate the safety and efficacy of DDL-920 in humans. If successful, this treatment could also have implications for other conditions associated with diminished gamma oscillations, such as depression and schizophrenia.

- UCLA researchers have developed a molecule, DDL-920, that restores cognitive functions in Alzheimer’s disease model mice.

- DDL-920 enhances gamma oscillations in the brain, which are essential for memory and cognition.

- The compound works differently from existing Alzheimer’s treatments by targeting neuronal circuits rather than just removing plaques.

- Further research is needed to assess the safety and effectiveness of DDL-920 in humans.

- The treatment may also benefit other conditions linked to reduced gamma oscillations, such as depression and autism spectrum disorder.

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Link Icon 10 comments
By @jmward01 - 6 months
Soon mice will live forever, with 100% cognitive function, no hair loss and free of cancer. Now if only we could do the same for people.
By @PaulKeeble - 6 months
Whether this is valid in humans likely depends on the Alzeimers mouse model. Some of the mouse models are really good because we can inject the mouse with something humans get and they suffer a similar fate. But for a lot of these complex diseases the analogues can be very unrepresentative or require genetically modified mice and they tend to translate less well.

"researchers used mice that were genetically modified to have symptoms of Alzheimer’s disease" is what I am concerned about. I remain hopeful it translates across and IDO1 has been implicated in a bunch of conditions so such a drug might find some other uses.

By @robwwilliams - 6 months
This link and promotional piece from UCLA was discuss two weeks ago. At least UCLA understands PR.

https://www.uclahealth.org/news/release/molecule-restores-co...

By @ned_at_codomain - 6 months
> The molecule, DDL-920, works differently from recent FDA-approved drugs for Alzheimer’s disease such as lecanemab and aducanumab, which remove harmful plaque that accumulates in the brains of Alzheimer’s disease patients. While removing this plaque has been shown to slow the rate of cognitive decline, it does not restore the memory or remedy cognitive impairments.

Thankful researchers are exploring some new approaches now. The amyloid hypothesis was fine, but its dominance seems to have set Alzheimer's research back by years.

By @narrator - 6 months
With negative GABA receptor allosteric modulators there's the potential for excitotoxicity. GABA receptors are there to counteract excessive excitatory activity after all. Likely there's a small therapeutic dosage window.
By @amluto - 6 months
This appears to be a duplicate of https://news.ycombinator.com/item?id=41194750
By @nick__m - 6 months
Figure s3 in the supplemental materials¹ is quite beautiful and the molecule (table s1) look simple for something that restore cognition. Lets hope that it also works in human.

1- https://www.pnas.org/action/downloadSupplement?doi=10.1073%2...

By @NeuroCoder - 6 months
I'd be curious about what the authors thoughts are on this molecule decreasing the threshold for seizures. I know they reported there were no clearly adverse effects throughout the study, but it's not like they had the mice on continuous EEG for epileptic events.
By @shcheklein - 6 months
A bit unrelated / meta question.

Since it's developed in UCLA - do they have resources to do the next phases of trials (humans, etc)? I wonder if in such cases pharma (those who obviously have enough money) care about these molecules at all? Since they probably can't put a patent on it and heavily monetize it later. Are there examples of drugs that were developed like this successfully?