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USC researcher leads effort to improve resear

maxmas07 by maxmas07
July 6, 2022
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USC researcher leads effort to improve resear
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picture: Hussein Yassine, MD, affiliate professor of medication and neurology on the Keck School of Medicine of USC and the Kenneth and Bette Volk Chair of Neurology of USC.
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Credit: USC

Anyone looking the web for mind wholesome meals will discover no scarcity of tales making dietary suggestions. Some of these tales level to observational research which have instructed a hyperlink between the decrease or better consumption of sure meals and the chance of dementia. But scientific analysis trying to join particular vitamins or diets to cognitive operate haven’t discovered convincing proof. 

“Many trials have not found that making people eat healthy or exercise is translating into benefits in the ways that is expected from the epidemiological research,” stated Hussein Yassine, MD, affiliate professor of medication and neurology on the Keck School of Medicine of USC and the Kenneth and Bette Volk Chair of Neurology of USC. “That means either there is no causal connection or that these studies have not been properly designed.”

To perceive this discrepancy between epidemiological analysis and scientific trials, Yassine led the Nutrition for Dementia Prevention Working Group, a group of scientists who spent two years surveying the prevailing literature on vitamin and dementia threat. Their evaluation, simply revealed in  The Lancet Healthy Longevity, identifies main limitations to current trials that affect how vitamin impacts the mind and affords a set of suggestions to information and improve future analysis. This work was supported by a grant from the National Institutes of Health (NIH).

Nutritional analysis presents distinctive challenges 

Yassine factors out that vitamin analysis typically is tough to execute properly. Epidemiological research present, for instance, an affiliation between individuals who eat fatty seafood, corresponding to salmon, and a decrease incidence of dementia. But it’s laborious to separate dietary data from different components that may additionally play a job, corresponding to the place an individual lives, concurrent wholesome existence or whether or not they have entry to correct medical care. 

Most of the scientific analysis on meals and mind well being could not have been performed over a time period lengthy sufficient for the outcomes to be significant as a result of it’s unknown how lengthy it takes for a nutritious diet to have an effect on cognition. “If it takes five to 10 years,” stated Yassine, “then studies that lasted for two years or less are not accurately reflecting the effect of the diet on cognition.” 

Future analysis may also improve if extra analysis is finished to perceive how a lot of a particular nutrient an individual wants to obtain optimum mind well being. For instance, there’s an accepted stage of vitamin D that sustains bone well being, however the identical can’t be stated for vitamins thought to affect cognitive well being.

Embracing new expertise and new areas of analysis

The group factors out that using biomarkers quite than cognitive assessments, essentially the most generally used device to analyze the success of an intervention, could lead to extra significant rapid outcomes that may information longer interventions that focus on scientific outcomes. Technology, corresponding to mind imaging, might be extraordinarily efficient in monitoring modifications to the mind over time. Likewise, they level out that testing blood or stool samples for sure biomarkers, corresponding to suboptimal consumption of a particular nutrient, can be used each to choose one of the best individuals and assist decide whether or not research individuals are responding to the intervention beneath research. 

Genetic testing can be an efficient device, in accordance to Yassine, who research apolipoprotein E4, or APOE4, which is the strongest genetic threat issue for late onset Alzheimer’s illness. He famous that folks with this genetic variant reply in a different way to food plan than non-carriers. Here, genetic testing can improve the standard of analysis with extra personalised interventions. 

Emerging information in regards to the microbiome may improve outcomes of analysis. Yassine famous that folks profit from meals in a different way primarily based on variations within the microbiome. “You cannot fully study how the diet is working without studying the microbiome,” stated Yassine. There can be a necessity for extra understanding of the underlying relationship between the intestine microbiota and cognition in giant populations of numerous people.

A recent method

Finally, the group concluded that researchers ought to take into account using a greater variety of research designs, not simply randomized managed trials, and extra thought ought to go into selecting individuals in trials. 

They notice that one technique can be to design small, personalised trials that take into account individuals’ genetic threat, high quality of their food plan, and evaluation of their microbiome whereas using biomarkers that replicate mind capabilities. Another method includes designing giant, pragmatic digital well being trials utilizing cellphones or tablets to acquire knowledge, geared toward individuals with dementia threat components.  

While a lot of the analysis to date has targeted on older individuals, a number of high-quality cohort research recommend that center life might be an optimum time to start such analysis, earlier than the modifications related to dementia set in, so researchers can observe modifications over time. Additionally, the group factors out that research want to take into account the dietary preferences of underrepresented teams, a few of whom are disproportionately affected by dementia. 

“This is an important document for anyone doing research on diet and how it relates to dementia,” stated Lon Schneider, MD, Professor of Psychiatry and the Behavioral Sciences on the Keck School of Medicine and Della Martin Chair in Psychiatry and Neuroscience. Dr. Schneider additionally serves on The Lancet Commission on dementia prevention, intervention, and care. “It is important that future trials yield accurate results that can be translated into better clinical care for patients.” 

“We are pleased to contribute to this working group, and to help turn these recommendations into reality,” stated Heather M. Snyder, Ph.D., Alzheimer’s Association vice chairman of medical and scientific relations.

This Personal View was supported by funding from each the National Institute on Aging (NIA R13AG069386) and the Alzheimer’s Association.

 



Journal

The Lancet Healthy Longevity

Method of Research

Literature evaluate

Subject of Research

Not relevant

Article Title

Nutrition state of science and dementia prevention: suggestions of the Nutrition for Dementia Prevention Working Group

Article Publication Date

4-Jul-2022

Disclaimer: AAAS and EurekAlert! will not be answerable for the accuracy of stories releases posted to EurekAlert! by contributing establishments or for the usage of any data by way of the EurekAlert system.



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