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By examining the role that cholesterol plays in both Alzheimer's disease and type 2 diabetes, researchers identified a small molecule that may help in regulating cholesterol levels in the brain.This can be seen as a potential new therapeutic target for Alzheimer's disease.The findings of the study were published in the journal ACS Pharmacology and Translational Science.There is no known cure for Alzheimer's disease, which affects more than 5.5 million people in the United States. In the last decade, scientists have found increasing evidence linking the underlying causes of Type 2 diabetes and Alzheimer's disease.Type 2 diabetes occurs when insulin becomes less efficient at removing glucose from the bloodstream, resulting in high blood sugar that can cause abnormal cholesterol levels. A similar situation occurs in Alzheimer's disease, but rather than affecting the body as a whole, the effects are localised in the brain."Alzheimer's and diabetes share many common causes," said Gregory Thatcher, PhD, professor of pharmacology and toxicology in the UArizona College of Pharmacy and the newly named R. Ken and Donna Coit Endowed Chair in Drug Discovery. "Our goal was to develop a way of identifying compounds that would counteract many detrimental changes that contribute to both Alzheimer's and Type 2 diabetes."When cholesterol rises, due to insulin resistance or other factors, the body starts a process known as reverse cholesterol transport, during which specific molecules carry excess cholesterol to the liver to be excreted. Apolipoprotein E (APOE) is one of the proteins involved in reverse cholesterol transport.APOE is also the strongest risk factor gene for Alzheimer's disease and related dementia, and an independent risk factor for Type 2 diabetes and cardiovascular disease. Similarly, reduced activity of another cholesterol transporter, ATP-binding cassette transporter A1 (ABCA1), correlates with increased risk of cardiovascular disease, Type 2 diabetes and Alzheimer's disease."While most people are aware of so-called 'good cholesterol,' and 'bad cholesterol,' associated with risk of heart attack and stroke, these broad concepts are also applicable to a healthy brain," said Dr Thatcher, who has been working to develop advanced therapeutics for Alzheimer's for more than 20 years. "Moving cholesterol to where it is needed in the body has positive effects on many physiological processes and can help clear misfolded proteins that accumulate in the brain."Increasing the activity of ABCA1 is expected to positively influence insulin signaling and reduce inflammation in the brain, making it a potential therapy for both Type 2 diabetes and Alzheimer's disease. In this study, Dr Thatcher and the research team designed a way to identify small molecules that improve the function of ABCA1 in the body while avoiding unwanted effects to the liver.In a March 20 paper in the journal EBioMedicine, "Metabolomic analysis of a selective ABCA1 inducer in obesogenic challenge provides a rationale for therapeutic development," Dr Thatcher's team honed in on a specific small molecule, CL2-57, due to its ability to stimulate ABCA1 activity with positive effects on liver and plasma triglycerides. The use of this compound showed improved glucose tolerance and insulin sensitivity, as well as reduced weight gain, among other beneficial effects.Their future research will seek to improve the properties of the small molecules to increase the levels in the brain. Their long-term goal is to understand which patients suffering from the cognitive and neuropsychiatric symptoms of Alzheimer's and dementia will benefit from the treatment."During the Covid-19 pandemic we hear about the mounting deaths in nursing homes and it's important to remember that Alzheimer's and related dementia is a major cause of the elderly moving to nursing homes," Dr Thatcher said. "It would be good to think of a future in which healthspan was extended, especially a healthy brain; maybe that's more important than lifespan."( With inputs from ANI )Disclaimer: This post has been auto-published from an agency feed without any modifications to the text and has not been reviewed by an editor

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Technology :Researchers discover new therapeutic target for Alzheimer's

By examining the role that cholesterol plays in both Alzheimer's disease and type 2 diabetes, researchers identified a small molecule that may help in regulating cholesterol levels in the brain. ...