2019

Contributed by Bryce Mander, PhD Getty Images Our colleagues at UCSF recently published findings in the journal Alzheimer’s and Dementia examining how tau pathology in different brain diseases – Alzheimer’s disease, progressive supranuclear palsy, and corticobasal degeneration – impacts brain cells that are in charge of keeping us awake. This study reported several important findings: In all three diseases, there was a reduction in brain cells that help promote cortical arousal. In all three diseases, tau pathology was quite substantial in several of the wake-promoting cells in the brainstem region. Tau pathology in the brainstem in Alzheimer’s disease was associated with…

Contributed by Joshua D. Grill, PhD A recent article in the New York Times highlights an important set of conundrums regarding amyloid imaging for Alzheimer’s disease. Amyloid imaging can detect with relative certainty whether beta amyloid plaques, which are a pathological hallmark of Alzheimer’s disease, are accumulating in a person’s brain. Conundrum #1: Amyloid scans are not covered by insurance for people with cognitive problems. Research led by our friend Dr. Gil Rabinovici at UCSF has demonstrated that amyloid imaging can and does yield important guidance to clinical care. It can change diagnoses and instruct prescribing decisions (more on this >).…

iStock Recent stories, including one this week by Washington Post, have highlighted the possible impact of anticholinergic medications on dementia. Some studies note that these medications may have negative side effects that mimic dementia in older adults. Others show a possible increase in dementia risk when taking strong anticholinergics long-term. However, more research is needed to understand this potential link. It's important to speak with your doctor about all your medications regularly, discussing potential benefits, risks, and interactions, to help manage your health over time. To learn more about medications and Alzheimer's disease, view UCI MIND's recent Facebook LIVE episode with…

The Global Council on Brain Health (GCBH), in partnership with AARP, recently released an extensive report reviewing the current evidence on brain health supplements. AARP formed the GCBH by bringing together an independent group of scientists, physicians, researchers, and other experts. Click here to learn more about these specialists. The GCBH found that there was a lack of evidence for effectiveness, concerns about false claims in marketing, and uncertainty of the possible risks of brain health supplements, since they are not required to be reviewed for purity, safety, and efficacy. The GCBH concluded that no endorsement could be made for…

Contributed by Joshua Grill, PhD The field of Alzheimer’s disease drug development received more troubling news yesterday, when the leaders of the GENERATION program halted their prevention clinical trials of a drug aiming to prevent the formation of the beta amyloid protein in people at risk to get Alzheimer’s disease. The GENERATION program is led by investigators at Banner Alzheimer’s Institute and is an important study in people at increased genetic risk to someday develop Alzheimer’s disease, based on the apolipoprotein E (APOE) gene. The trials were stopped because preliminary results indicated that the drug under study, CNP520 (being developed…

Contributed by Joshua Grill, PhD, Director of UCI MIND A recent report from The Economist concludes that three neurological disorders — migraine, multiple sclerosis, and Alzheimer’s disease — are impacting workplace productivity. Notably, all three conditions disproportionately affect women. While it is now clear that Alzheimer’s disease begins decades prior to diagnosis, the larger impact on the global economy results from the growing number of workers who are trying to balance employment as well as caregiving for a parent with the disease. More than 16 million Americans are unpaid caregivers for someone with Alzheimer’s disease and the most common caregiver is…

Contributed by Joan Steffan, PhD & Leslie Thompson, PhD Results from a recent study published by Tabrizi and colleagues and Ionis/Roche Pharmaceuticals in The New England Journal of Medicine are very exciting for the Huntington’s disease (HD) patient, family, and scientific communities. The researchers showed for the first time that treatment with a huntingtin lowering drug called an antisense oligonucleotide, or ASO, is safe in HD patients.  Huntingtin is the protein linked to the genetic mutation that causes HD. With these results, researchers are planning a large clinical trial to test whether ASO can reduce symptoms in HD patients. The HD community is…

Contributed by Andrea J. Tenner, PhD Researchers at McGill University recently published results from a clinical trial of the common non-steroidal anti-inflammatory drug (NSAID), naproxen, showing that it was ineffective at preventing Alzheimer's disease (AD) in cognitively unimpaired people with a family history. I am not surprised by this result, as naproxen is a nonselective inhibitor of inflammatory mediators.  Dr. Breitner, the lead investigator on the manuscript, is an excellent physician scientist.  The study authors indicated that the results do not rule out a benefit from mid-life anti-inflammatory drugs, and that the study turned out to have too few participants…

Contributed by S. Ahmad Sajjadi, MD, PhD, Neurologist Last week, the results of a very important and highly anticipated study, the IDEAS (Imaging Dementia – Evidence For Amyloid Scanning) study, were published in the Journal of the American Medical Association (JAMA). This national multi-center study, including UC Irvine, enrolled more than 11,000 Medicare beneficiaries with cognitive impairment to undergo a special type of scan called amyloid positron emission tomography (PET). Amyloid PET scan provides the opportunity to visualize the accumulation of abnormal amyloid plaques on the brain. Amyloid and tau proteins are the hallmarks of Alzheimer’s disease (AD). The study…

Contributed by Christian Salazar, PhD, Project Scientist The link between gum disease and Alzheimer’s disease has received considerable attention over the past few years. The recent laboratory findings in mice from Potempa and colleagues are consistent with evidence from mostly cross-sectional observational studies in humans that suggest an association between the two diseases. However, as the article notes, we are still far from establishing a cause-and-effect relationship in humans. Not only is there difficulty in translating findings from mice to humans, but cross-sectional studies that collect data at one point in time can have many methodological limitations. For example, poor…

Contributed by Joshua Grill, PhD, Director of UCI MIND The global research effort to find effective treatments for Alzheimer’s disease has suffered another disappointing setback. Biogen announced today that the company will halt the parallel large Phase 3 trials of the monoclonal antibody against the amyloid beta protein, aducanumab. This treatment was viewed by many to hold tremendous promise. Early results were unprecedented. Patients with Alzheimer’s disease who were treated with aducanumab showed significant reduction in amyloid burden in the brain, which appeared to slow disease progression. The results were based on a small number of participants, however, and were not…