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    Home » Compound found in common herbs inspires poten
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    Compound found in common herbs inspires poten

    morshediBy morshediMarch 14, 2025No Comments6 Mins Read
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    Compound found in common herbs inspires potential anti-inflammatory drug for Alzheimer’s disease

    picture: 

    Microscopy photographs present fluorescently stained mouse brains expressing genes that trigger Alzheimer’s illness. In contrast with an Alzheimer’s-like mind (left), the extra intense inexperienced colour (proper) signifies extra neuronal synapses—connections between nerve cells that underlie studying and reminiscence—upon remedy with the drug diAcCA.


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    Credit score: Scripps Analysis

    LA JOLLA, CA—The herb rosemary has lengthy been linked with reminiscence: “There’s rosemary, that’s for remembrance,” says Ophelia in Shakespeare’s Hamlet. So it’s becoming that researchers would research a compound present in rosemary and sage—carnosic acid—for its affect on Alzheimer’s illness. Within the illness, which is the main reason for dementia and the sixth main reason for dying within the US, irritation is one element that always results in cognitive decline.

    Carnosic acid is an antioxidant and anti inflammatory compound that works by activating enzymes that make up the physique’s pure protection system. Whereas pure carnosic acid is simply too unstable for use as a drug, scientists at Scripps Analysis have now synthesized a secure kind, diAcCA. This compound is absolutely transformed to carnosic acid within the intestine earlier than being absorbed into the bloodstream.

    The analysis, printed in Antioxidants on February 28, 2025, confirmed that when diAcCA was used to deal with mouse fashions of Alzheimer’s illness, it achieved therapeutic doses of carnosic acid within the mind and led to enhanced reminiscence and synaptic density, or extra synapses (representing the connections between nerve cells), within the mind. As a result of the decline of neuronal synapses can be carefully correlated to dementia in Alzheimer’s illness, this method might counteract the development of cognitive decline.

    Evaluation of tissue samples confirmed the drug additionally markedly decreased irritation within the mind. This distinctive drug is activated by the very irritation that it then combats and thus is barely energetic in areas of the mind present process inflammatory injury. This selectivity limits the potential unwanted effects of carnosic acid, which is on the US Meals and Drug Administration’s “usually considered secure” (GRAS) checklist, easing the best way for medical trials.

    “By combating irritation and oxidative stress with this diAcCA compound, we really elevated the variety of synapses within the mind,” says senior writer and professor Stuart Lipton, MD, PhD, the Step Household Basis Endowed Chair at Scripps Analysis and a medical neurologist in La Jolla, California. “We additionally took down different misfolded or aggregated proteins corresponding to phosphorylated-tau and amyloid-β, that are thought to set off Alzheimer’s illness and function biomarkers of the illness course of.”

    Lipton’s group had previously determined that carnosic acid crosses the blood-brain barrier and prompts the Nrf2 transcriptional pathway, which activates antioxidant and anti inflammatory genes. However the compound oxidizes simply, making it unsuitable as a drug due to its brief shelf-life.

    On this new research, Lipton and co-author Phil Baran, PhD, the Dr. Richard A. Lerner Endowed Chair within the Division of Chemistry at Scripps Analysis, synthesized a variety of carnosic acid derivatives and chosen diAcCA as the very best candidate due to its stability, bioavailability, and different drug-like properties. Lipton’s group then handled mouse fashions with the compound over the course of three months. The group examined the mice by testing their spatial studying and reminiscence in behavioral assessments after which analyzing mind tissue beneath the microscope.

    “We did a number of totally different assessments of reminiscence, they usually had been all improved with the drug,” Lipton says. “And it didn’t simply decelerate the decline; it improved just about again to regular.” Evaluation of tissues additionally confirmed elevated neuronal synaptic density and decreased formation of phosphorylated-tau aggregates and amyloid-β plaques.

    The mice tolerated diAcCA nicely. In toxicity research, the compound even soothed baseline irritation within the esophagus and abdomen because it was transformed to carnosic acid.

    The group additionally discovered that the mice took up about 20% extra carnosic acid after ingesting diAcCA than they did after taking plain carnosic acid. As a result of most carnosic acid oxidizes whereas being saved or upon ingestion, “diAcCA produces extra carnosic acid within the blood than in case you took carnosic acid itself,” Lipton explains.

    Lipton sees a possible for diAcCA to work in tandem with Alzheimer’s therapies at the moment available on the market. Not solely might the drug work by itself by combating irritation, however “it might make present amyloid antibody therapies work higher by taking away or limiting their unwanted effects” corresponding to a type of mind swelling or bleeding often known as ARIA-E and ARIA-H, he says.

    Lipton hopes diAcCA will be fast-tracked via medical trials due to its security profile. He thinks it is also explored as a remedy for different issues marked by irritation, corresponding to sort 2 diabetes, coronary heart illness, and different types of neurodegeneration corresponding to Parkinson’s illness.

    Along with Lipton and Baran, authors of the research “diAcCA, a Pro-Drug for Carnosic Acid That Activates the Nrf2 Transcriptional Pathway, Shows Efficacy in the 5xFAD Transgenic Mouse Model of Alzheimer’s Disease” embody Piu Banerjee, Yubo Wang, Lauren N. Carnevale, Parth Patel, Charlene Ok Raspur, Nancy Tran, Xu Zhang, and Amanda J. Roberts of Scripps Analysis and Ravi Natarajan of Socrates Biosciences.

    This work was supported by funding from the Nationwide Institutes of Well being (U01 AG088679, R01 AG056259, R35 AG071734, RF1 AG057409, R01 AG056259, R56 AG065372, R01 DA048882, DP1 DA041722 and S10 OD030332).

    About Scripps Analysis

    Scripps Analysis is an impartial, nonprofit biomedical institute ranked probably the most influential on this planet for its affect on innovation by Nature Index. We’re advancing human well being via profound discoveries that handle urgent medical considerations across the globe. Our drug discovery and growth division, Calibr-Skaggs, works hand-in-hand with scientists throughout disciplines to carry new medicines to sufferers as shortly and effectively as potential, whereas groups at Scripps Analysis Translational Institute harness genomics, digital medication and cutting-edge informatics to know particular person well being and render simpler healthcare. Scripps Analysis additionally trains the following technology of main scientists at our Skaggs Graduate College, persistently named among the many prime 10 US applications for chemistry and organic sciences. Study extra at www.scripps.edu.



    Article Title

    diAcCA, a Professional-Drug for Carnosic Acid That Prompts the Nrf2 Transcriptional Pathway, Exhibits Efficacy within the 5xFAD Transgenic Mouse Mannequin of Alzheimer’s Illness

    Article Publication Date

    28-Feb-2025

    Disclaimer: AAAS and EurekAlert! should not chargeable for the accuracy of stories releases posted to EurekAlert! by contributing establishments or for using any data via the EurekAlert system.



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