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Repetitive negative thinking linked to dementia risk

Persistently engaging in negative thinking patterns may raise the risk of Alzheimer’s disease, finds a new UCL-led study.

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Persistently engaging in negative thinking patterns may raise the risk of Alzheimer’s disease, finds a new UCL-led study.

In the study of people aged over 55, published in Alzheimer’s & Dementia, researchers found ‘repetitive negative thinking’ (RNT) is linked to subsequent cognitive decline as well as the deposition of harmful brain proteins linked to Alzheimer’s.

The researchers say RNT should now be further investigated as a potential risk factor for dementia, and psychological tools, such as mindfulness or meditation, should be studied to see if these could reduce dementia risk.

Lead author Dr Natalie Marchant (UCL Psychiatry) said: “Depression and anxiety in mid-life and old age are already known to be risk factors for dementia. Here, we found that certain thinking patterns implicated in depression and anxiety could be an underlying reason why people with those disorders are more likely to develop dementia.

“Taken alongside other studies, which link depression and anxiety with dementia risk, we expect that chronic negative thinking patterns over a long period of time could increase the risk of dementia. We do not think the evidence suggests that short-term setbacks would increase one’s risk of dementia.

“We hope that our findings could be used to develop strategies to lower people’s risk of dementia by helping them to reduce their negative thinking patterns.”

For the Alzheimer’s Society-supported study, the research team from UCL, INSERM and McGill University studied 292 people over the age of 55 who were part of the PREVENT-AD cohort study, and a further 68 people from the IMAP+ cohort.

Over a period of two years, the study participants responded to questions about how they typically think about negative experiences, focusing on RNT patterns like rumination about the past and worry about the future. The participants also completed measures of depression and anxiety symptoms.

Their cognitive function was assessed, measuring memory, attention, spatial cognition, and language. Some (113) of the participants also underwent PET brain scans, measuring deposits of tau and amyloid, two proteins which cause the most common type of dementia, Alzheimer’s disease, when they build up in the brain.

The researchers found that people who exhibited higher RNT patterns experienced more cognitive decline over a four-year period, and declines in memory (which is among the earlier signs of Alzheimer’s disease), and they were more likely to have amyloid and tau deposits in their brain.

Depression and anxiety were associated with subsequent cognitive decline but not with either amyloid or tau deposition, suggesting that RNT could be the main reason why depression and anxiety contribute to Alzheimer’s disease risk.

“We propose that repetitive negative thinking may be a new risk factor for dementia as it could contribute to dementia in a unique way,” said Dr Marchant.

The researchers suggest that RNT may contribute to Alzheimer’s risk via its impact on indicators of stress such as high blood pressure, as other studies have found that physiological stress can contribute to amyloid and tau deposition.

Co-author Dr Gael Chételat (INSERM and Université de Caen-Normandie) commented: “Our thoughts can have a biological impact on our physical health, which might be positive or negative. Mental training practices such as meditation might help promoting positive- while down-regulating negative-associated mental schemes.

“Looking after your mental health is important, and it should be a major public health priority, as it’s not only important for people’s health and well-being in the short term, but it could also impact your eventual risk of dementia.”

The researchers hope to find out if reducing RNT, possibly through mindfulness training or targeted talk therapy, could in turn reduce the risk of dementia. Dr Marchant and Dr Chételat and other European researchers are currently working on a large project to see if interventions such as meditation may help reduce dementia risk by supporting mental health in old age.

Fiona Carragher, Director of Research and Influencing at Alzheimer’s Society, said: “Understanding the factors that can increase the risk of dementia is vital in helping us improve our knowledge of this devastating condition and, where possible, developing prevention strategies. The link shown between repeated negative thinking patterns and both cognitive decline and harmful deposits is interesting although we need further investigation to understand this better. Most of the people in the study were already identified as being at higher risk of Alzheimer’s disease, so we would need to see if these results are echoed within the general population and if repeated negative thinking increases the risk of Alzheimer’s disease itself.

“During these unstable times, we are hearing from people every day on our Alzheimer’s Society Dementia Connect line who are feeling scared, confused, or struggling with their mental health. So it’s important to point out that this isn’t saying a short-term period of negative thinking will cause Alzheimer’s disease. Mental health could be a vital cog in the prevention and treatment of dementia; more research will tell us to what extent.”

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Pru Life UK agents, customers, executives celebrate Year of the Wood Dragon

The insurer maintains its top position in New Business Annual Premium Equivalent & total Premium Income from Variable Life Insurance products according to the Insurance Commission’s Life Insurance Sector Quarterly Statistics for Q3 2023.

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With a strengthened commitment to providing better financial protection for every Filipino, Pru Life UK celebrates the start of the Year of the Wood Dragon. Over 200 Pru Life UK leaders, agents, clients, and employees joined and wished everyone PRU Love during the festivities held at the heart of its Escolta branch in Binondo Manila.

The insurer maintains its top position in New Business Annual Premium Equivalent & total Premium Income from Variable Life Insurance products according to the Insurance Commission’s Life Insurance Sector Quarterly Statistics for Q3 2023.

Pru Life UK’s products are made accessible through its over 42,000 digitally-empowered agency workforce and like-minded partners.

The Company recently launched PRULove for Life – an affordable, limited-pay, whole-life participating plan for as low as Php 87 per day* with lifetime coverage up to age 100 and flexible payment terms of 5, 10, 15, or 20 years to pay. To know more about PRULove for Life, talk to your Pru Life UK agent today or visit Pru Life UK’s website.

Pru Life UK is also committed to driving up financial awareness, literacy, and inclusion in the country by leading industry discussions and programs for the community. Its PRUBabies campaign seeks to protect 175,000 newborns with free insurance coverage against select infectious diseases such as Dengue, Typhoid, Measles, and Malaria.

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Eating too much protein is bad for your arteries, and this amino acid is to blame

Consuming over 22% of dietary calories from protein can lead to increased activation of immune cells that play a role in atherosclerotic plaque formation, driving the disease risk.

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University of Pittsburgh School of Medicine researchers discovered a molecular mechanism by which excessive dietary protein could increase atherosclerosis risk. The findings were published in Nature Metabolism.

The study, which combined small human trials with experiments in mice and cells in a Petri dish, showed that consuming over 22% of dietary calories from protein can lead to increased activation of immune cells that play a role in atherosclerotic plaque formation, driving the disease risk. Furthermore, the scientists showed that one amino acid – leucine – seems to have a disproportionate role in driving the pathological pathways linked to atherosclerosis, or stiff, hardened arteries.

“Our study shows that dialing up your protein intake in pursuit of better metabolic health is not a panacea. You could be doing real damage to your arteries,” said senior and co-corresponding author Babak Razani, M.D., Ph.D., professor of cardiology at Pitt. “Our hope is that this research starts a conversation about ways of modifying diets in a precise manner that can influence body function at a molecular level and dampen disease risks.”

According to a survey of an average American diet over the last decade, Americans generally consume a lot of protein, mostly from animal sources. Further, nearly a quarter of the population receives over 22% of all daily calories from protein alone.

That trend is likely driven by the popular idea that dietary protein is essential to healthy living, says Razani. But his and other groups have shown that overreliance on protein may not be such a good thing for long-term health.

Following their 2020 research, in which Razani’s laboratory first showed that excess dietary protein increases atherosclerosis risk in mice, his next study in collaboration with Bettina Mittendorfer, Ph.D., a metabolism expert at the University of Missouri, Columbia, delved deeper into the potential mechanism and its relevance to the human body.

To arrive at the answer, Razani’s laboratory, led by first-authors Xiangyu Zhang, Ph.D., and Divya Kapoor, M.D., teamed up with Mittendorfer’s group to combine their expertise in cellular biology and metabolism and perform a series of experiments across various models – from cells to mice to humans.

“We have shown in our mechanistic studies that amino acids, which are really the building blocks of the protein, can trigger disease through specific signaling mechanisms and then also alter the metabolism of these cells,” Mittendorfer said. “For instance, small immune cells in the vasculature called macrophages can trigger the development of atherosclerosis.”

Based on initial experiments in healthy human subjects to determine the timeline of immune cell activation following ingestion of protein-enriched meals, the researchers simulated similar conditions in mice and in human macrophages, immune cells that are shown to be particularly sensitive to amino acids derived from protein.

Their work showed that consuming more than 22% of daily dietary calories through protein can negatively affect macrophages that are responsible for clearing out cellular debris, leading to the accumulation of a “graveyard” of those cells inside the vessel walls and worsening of atherosclerotic plaques overtime. Interestingly, the analysis of circulating amino acids showed that leucine – an amino acid enriched in animal-derived foods like beef, eggs and milk – is primarily responsible for abnormal macrophage activation and atherosclerosis risk, suggesting a potential avenue for further research on personalized diet modification, or “precision nutrition.”

Razani is careful to note that many questions remain to be answered, mainly: What happens when a person consumes between 15% of daily calories from protein as recommended by the USDA and 22% of daily calories from protein, and if there is a ‘sweet spot’ for maximizing the benefits of protein – such as muscle gain – while avoiding kick-starting a molecular cascade of damaging events leading to cardiovascular disease.

The findings are particularly relevant in hospital settings, where nutritionists often recommend protein-rich foods for the sickest patients to preserve muscle mass and strength.

“Perhaps blindly increasing protein load is wrong,” Razani said. “Instead, it’s important to look at the diet as a whole and suggest balanced meals that won’t inadvertently exacerbate cardiovascular conditions, especially in people at risk of heart disease and vessel disorders.”

Razani also notes that these findings suggest differences in leucine levels between diets enriched in plant and animal protein might explain the differences in their effect on cardiovascular and metabolic health. “The potential for this type of mechanistic research to inform future dietary guidelines is quite exciting,” he said.

Additional authors of the study are Yu-Sheng Yeh, Ph.D., also from Pitt; Alan Fappi, Ph.D. and Vasavi Shabrish, Ph.D., both of the University of Missouri, Columbia; Se-Jin Jeong, Ph.D., Jeremiah Stitham, M.D., Ph.D., Ismail Sergin, Ph.D., Eman Yousif, M.D., Astrid Rodriguez-Velez, Ph.D., Arick Park, M.D., Ph.D., Joel Schilling, M.D., Ph.D., Marco Sardiello, Ph.D., Abhinav Diwan, M.D., Nathan Stitziel, M.D., Ph.D., Ali Javaheri, M.D., Ph.D., Irfan Lodhi, Ph.D., and Jaehyung Cho, Ph.D., all of Washington University School of Medicine, St. Louis; Arif Yurdagul Jr, Ph.D., and Oren Rom, Ph.D., both of the Louisiana State University Health Sciences Center; and Slava Epelman, M.D., Ph.D., of the University of Toronto.

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IRONKIDS Cebu in Lapu-Lapu partners with RLC Residences

This April will be the first event of the partnership as the brand extends their support for the budding young athletes. The aquathlon will see participants from ages 6 to 15 years old complete the race happening at The Reef Island Resort in Mactan.

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The IRONMAN Group Philippines and RLC Residences have announced in 2023 a new partnership—as the residential brand of Robinsons Land Corporation, RLC Residences becomes the title sponsor for IRONKIDS Lapu-Lapu and IRONKIDS Davao for 2024.

This April will be the first event of the partnership as the brand extends their support for the budding young athletes.  The aquathlon will see participants from ages 6 to 15 years old complete the race happening at The Reef Island Resort in Mactan.

RLC Residences Head of Brand Management Mr. Dan Carlo Torres shares his enthusiasm towards the event. “We are very excited to see this partnership unfold. We’ve been very supportive of IRONMAN, especially IRONKIDS because we also believe in the importance of promoting an active and purposeful lifestyle at such a young age and we hope to continuously be part of IRONMAN as we create more vibrant opportunities for our future triathletes,” he added.

“As we aspire to live our best lives, we work to inspire the wider community,” said Ms Princess Galura, Regional Director of the IRONMAN Group Philippines.  “For 10 years, the IRONKIDS has been a part of the Cebuano youth’s stepping stone to either a future in sports, representing the Philippines in international events, as well as planting the seeds of a healthy, sporty lifestyle.  Our partnership with RLC Residences allows us to do so and we are excited to hold the festivities for our youth once again in Lapu-Lapu this April,” she added.

The IRONKIDS event in Lapu-Lapu will feature age group categories for the 6 to 8 years old, 9 to 10 years old, 11 to 12 years old and 13 to 15 years old.  Relay categories are also available for mixed team relay for 6-10 year-olds and 11-15 year-olds. 

Swim and run courses, the transition area and finish line will be at The Reef Island Resort, which is conveniently located in a gated community.  Families who are checked in during race weekend can enjoy amenities of the resort –  including the beach, lap pool and game room.  The resort’s restaurant is operated by Cebu-based top tier chain, Abaca.

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