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Early detection and treatment of Alzheimer's disease require the use of dependable and cost-effective screening technologies. Researchers at Sweden's Karolinska Institutet have revealed that the level of tau, a protein that plays a vital role in the development of severe dementia, is associated with a kind of sugar molecule in the blood. The study, which is published in Alzheimer's & Dementia, can pave the way for a simple screening procedure able to predict onset ten years in advance. "The role of glycans, structures made up of sugar molecules, is a relatively unexplored field in dementia research," says the study's first author Robin Zhou, medical student and affiliated researcher at the Department of Neurobiology, Care Sciences and Society (NVS), Karolinska Institutet. "We demonstrate in our study that blood levels of glycans are altered early during the development of the disease. This could mean that we'll be able to predict the risk of Alzheimer's disease with only a blood test and a memory test." In Alzheimer's disease, the neurons of the brain die, which is thought to be a result of the abnormal accumulation of the proteins amyloid beta and tau. Clinical trials for Alzheimer's drugs show that treatment should commence early in the pathological process, before too many neurons have died, to reverse the process before it is too late.

The first big breakthrough in 30 years of Alzheimer's research is providing momentum for clinical trials of "cocktail" treatments targeting the two hallmark proteins associated with the mind-robbing disease, according to interviews with researchers and pharmaceutical executives. Drugmakers Eisai and Biogen reported in September that their therapy lecanemab could slow progress of the disease by 27% over 18 months compared with a placebo. The finding validates the theory that clearing the amyloid protein that forms clumps in the brains of Alzheimer's patients could slow or halt the disease and has strengthened the support from some scientists for simultaneously targeting another notorious protein linked to Alzheimer's: tau. Eisai and Biogen are scheduled to present full data from their lecanemab study on Tuesday at the Clinical Trials on Alzheimer's Disease conference in San Francisco. The U.S. Food and Drug Administration is expected to make a decision by early January on the companies' application for accelerated approval. If approved on an accelerated basis, the companies said they would immediately apply for full U.S. regulatory approval which could help secure Medicare coverage.

Diabetes drugs that also promote weight loss such as Novo Nordisk's Ozempic, becoming a darling of celebrities and investors, are being studied to tackle some of the most difficult-to-treat brain disorders, including Alzheimer's disease. Diabetes regimens, from Ozempic to old mainstays like insulin and metformin, appear to address several different aspects of the metabolic system implicated in Alzheimer's disease, including a protein called amyloid and inflammation, researchers say. The hope is that improving glucose utilisation and tamping down inflammation in the entire body - including the brain - could slow progression of debilitating diseases like Alzheimer's and Parkinson's. Several scientists interviewed by Reuters news agency pointed to mounting research supporting testing diabetes drugs against neurodegenerative diseases. Results are years away and success uncertain. But interest has been buoyed by recent positive data on Alzheimer's drugs developed by Eisai with partner Biogen and by Eli Lilly demonstrating that removing sticky amyloid plaques accumulated in the brain can slow cognition decline caused by the fatal mind-wasting disease. Those successes followed decades of futility that had left many questioning the validity of the amyloid theory behind most experimental Alzheimer's drugs.

A £5m project has been launched to introduce new blood tests in the National Health Service (NHS) that can diagnose Alzheimer's disease. The blood tests could be available on the NHS within five years and they can diagnose the disease earlier and more accurately than current methods, experts have said. Alzheimer's Research UK, the Alzheimer's Society and the National Institute of Health and Care Research have jointly launched the project. Susan Kohlhaas, Executive Director of Research and Partnerships at Alzheimer's Research UK, said that the NHS doesn't possess the "required levels of diagnostic infrastructure" to cope with the "growing demand" for dementia diagnosis. "Low-cost tools like blood tests that are non-invasive and simpler to administer than current gold standard methods are the answer to this," she added.

According to Alzheimer's Disease International, more than 55 million people worldwide will have Alzheimer's disease by 2020. This figure will nearly double every 20 years, reaching 78 million in 2030 and 139 million in 2050. The WHO Global Status Report for 2021 estimated the yearly global cost of dementia to be more than USD 1.3 trillion, with a projected increase to USD 2.8 trillion by 2030. To date most drugs developed to treat Alzheimer's disease have failed, largely because they target wrong biomarkers and individuals already exhibiting signs of the disease. Once symptoms appear, however, many brain cells responsible for memory and cognition are likely already damaged and beyond repair. Professor Shai Rahimipour in the Chemistry Department at Bar-Ilan University in Israel has pioneered a different approach utilizing theranostics to pinpoint and treat the earliest, pre-symptomatic signs of Alzheimer's disease. Showing promise in stopping progression of the disease before onset of irreversible brain cell damage, Rahimipour's groundbreaking approach has garnered significant attention in the scientific world.

In a new study, men who took phosphodiesterase type 5 inhibitors (PDE5Is), such as Viagra (sildenafil; Pfizer), for treatment of erectile dysfunction, were found to be 18 per cent less likely to develop Alzheimer's compared to those who did not take the drugs. The results of the population-based cohort study were published in Neurology on 7 February 2024. Researchers at University of Oxford examined IQVIA Medical Research Data UK records of 269,725 men, who were diagnosed with erectile dysfunction between January 2000 and March 2017. None of the participants had any memory or thinking problems at the start of the study and they were followed for an average of 5.1 years. During the study, 749 out of 1,119 participants taking erectile dysfunction drugs developed Alzheimer's disease.

Digestive issues such as constipation, dysphagia and irritable bowel syndrome (IBS) may be precursors of Parkinson's disease, according to research published in the journal Gut. Gastrointestinal symptoms are thought to precede the development of some cerebrovascular disease, including brain aneurysm or Alzheimer's disease, and it has been suggested (Braak's hypothesis) that gut conditions may precede the development of Parkinson's disease too. To test this hypothesis, researchers used data from a US nationwide medical record network (TriNetX) to compare 24,624 people who had been diagnosed with Parkinson's disease of unknown cause with those who had been diagnosed with other neurological conditions - Alzheimer's disease (19,046) or cerebrovascular disease (23,942) - or with none of these (24,624; comparison group).

A new study published in The Lancet has revealed that a total of 1.7 million people could be living with dementia in England and Wales by 2040. The research highlighted increasing numbers of people who will suffer from Alzheimer's. The disease would massively increase the burden on the healthcare system. The research was led by University of College London (UCL). Lead researcher, Dr Yuntao Chen said, "It is shocking to think that the number of people living with dementia by 2040 may be up to 70 per cent higher than if dementia incidence had continued to decline. "Not only will this have a devastating effect on the lives of those involved but it will also put a considerably larger burden on health and social care than current forecasts predict.

Apple has joined forces with Eli Lilly and Evidation Health on a new feasibility study to detect evidence of brain decline with data from personal digital devices. The research has revealed that these devices may help in the identification of mild cognitive impairment (MCI) and Alzheimer's disease dementia.