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AAIC 2023 | How do genetic scores impact the value of lifestyle interventions?

Alina Solomon, MD, PhD, University of Eastern Finland, Kuopio, Finland, comments on her work looking at the impact of genetic risk on the benefits of multidomain lifestyle dementia preventive interventions. The FINGER trial randomized more than 1200 Finnish participants at risk for dementia, testing the value of a lifestyle intervention comprising of diet adjustment, exercise, cognitive training, social activities, and cardiovascular risk monitoring. Reading out in 2015, the FINGER multidomain intervention achieved greater cognitive benefits, compared to the control arm. In this study, Dr Solomon investigated the impact of APOE4 carriership and polygenic risk scores for Alzheimer’s disease on the benefit seen in the FINGER trial. Preliminary results point towards at least an equivalent, if not a greater, benefit in patients with higher genetic risk, compared to those with lower risk. Individuals carrying APOE4 demonstrated clear cognitive benefits with the FINGER intervention. To verify these findings across diverse populations, the WW-FINGERS network aims to perform a joint analysis. In the MET-FINGER trial, the first FINGER 2.0 study, which will combine the FINGER lifestyle intervention with metformin use, an APOE4-enriched population will be enrolled based on these genetic findings. This interview took place at the Alzheimer’s Association International Conference® (AAIC) 2023 in Amsterdam, Netherlands.

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Transcript (edited for clarity)

Yes. So the main question we wanted to look at was do people with genetic risk factors for dementia, so people with genetic susceptibility for dementia, do they benefit from lifestyle interventions? And we used a multidomain approach here. So multidomain approach means on one hand lifestyle intervention that targets multiple risk factors at the same time and on the other hand, we wanted to look at multiple genetic risk factors...

Yes. So the main question we wanted to look at was do people with genetic risk factors for dementia, so people with genetic susceptibility for dementia, do they benefit from lifestyle interventions? And we used a multidomain approach here. So multidomain approach means on one hand lifestyle intervention that targets multiple risk factors at the same time and on the other hand, we wanted to look at multiple genetic risk factors. So of course, APOEε4 allele which is very important for Alzheimer’s disease, for example, but also polygenic risk scores. Well, it’s all good news, I think. I think we can be pretty sure at this point that it’s good news. So, what we are seeing in our results is that people with higher genetic risk either because they are APOEε4 carriers or because they have a higher polygenic risk score, worst case scenario they benefit at least as much as the people with lower genetic risk but it’s actually looking like they may be benefiting more than people with lower genetic risk. This is the FINGER trial only results at this point. A single trial is not really it doesn’t have the statistical power to confirm this this kind of findings. So we’re seeing some signals in this direction and what we plan to do in the World-Wide FINGERS Network, so that’s a global network of multi domain lifestyle dementia prevention trials, to do joint analysis across multiple trials when their results become ready because many of them are ongoing at this point. So do joint analysis and see if we can confirm this across multiple populations. genetically diverse populations because fingers than in Finland, it’s a pretty homogeneous group. We want to see this outside Finland, also outside Europe as well.

We are we are trying to use these results in the new FINGER-based trials. And MET-FINGER is special because it’s the first FINGER 2.0 trial. So it’s a model that combines the FINGER lifestyle intervention with a potential disease-modifying drug. In this case it’s repurposed so MET is for metformin, the diabetes medication and what we are doing is we are targeting a population enriched with APOEε4 carriers because we’ve seen in FINGER and also in other trials like MAPT in France and also J-MINT in Japan that ApoEε4 carriers do have more benefit than non-carriers. So we are including them.

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