Can Broccoli and B-Vitamins Prevent Alzheimer’s?
Dr Arancio is a cellular neurobiologist who has contributed to the characterization of the mechanisms of learning in both normal conditions and during neurodegenerative diseases. During the past decade he has pioneered the field of mechanisms of synaptic dysfunction in Alzheimer’s disease. Dr. Arancio’s laboratory has focused primarily on events triggered by amyloid protein. These studies, which have suggested new links between synaptic dysfunction and amyloid protein, are of a general relevance to the field of Alzheimer’s disease both for understanding the etiopathogenesis of the disease and for developing therapies aiming to improve the cognitive symptoms.
Can Broccoli and B-Vitamins Prevent Alzheimer’s?
Meryl Comer: Just slowing the progression for five years for families builds quality of life, but from a societal point of view saves billions and billions of dollars. Let’s look at the notion of maintaining your brain so you don’t get it. Dr. Gandy, a 15-member panel of experts at the National Institute of Health reported: forget the crossword puzzles, forget the exercise, forget learning French, none of it is going to help. How do you respond to that?
Dr. Gandy: Well I don’t think they quite said it that negatively. What they said was that we currently don’t have sufficient evidence to guide therapy, to guide doctors to tell their patients: yes, take six ounces of broccoli, do the crossword puzzle on Wednesday and Friday and then you run four days a week. The challenge with all these lifestyle issues is that they have to be evaluated with what are called randomized clinical trials, the way a drug is evaluated. And the challenge is turning crossword puzzles and broccoli into drugs. And that is really the challenge for all of us. We think that there are benefits there, but we don’t have the evidence yet and getting the evidence is not easy.
Meryl Comer: Let’s go quickly through some of these. B vitamins, large doses are supposed to reduce the rate of brain shrinkage by half.
Dr. Troncoso: Well I think that the case of B vitamins that have many targets. It is possible they may work for Alzheimer’s disease. We don’t know that. But clearly it has probably some very good affect in the protein metabolism preventing vascular disease, so it may be that it is good, but the point is that it’s not... it hasn’t been demonstrated that it effectively prevents Alzheimer’s disease. It may prevent some brain shrinkage as determined by imaging, but... and I think that this committee that you were quoting there they really they were negative just for being negative. One of the important points is to protect actually the patients and caretakers from individuals or systems that may try to start commercializing puzzles for Alzheimer’s disease or this medication. We don’t want people to have false expectations, at the same time spend tremendous amount of monies in useless treatments.
Meryl Comer: Well one good example of that is 110 million dollars spent annually by Americans on ginkgo biloba and a 30-million-dollar study saying it doesn’t work, so that is one of the challenges. How about the latest study that just was released in the Wall Street Journal about smoking in your 50s doubles your rate of acquiring Alzheimer’s?
Dr. Gandy: Yeah, that sort of what the study shows, and I think there were no obvious flaws in the study that anyone has picked out so far, looking to see if it looks authentic. Obviously all studies, like all experiments, must be replicated by someone to prove that they are true. I mean the most important thing about the smoking paper though is that that is a modifiable factor. Head injury is difficult to modify unless you’re going to wear a helmet and never engage in any activities that are risky—basically don’t leave your house. But the smoking is modifiable. Meryl Comer: You wanted to make a point?
Dr. Troncoso: I think that many of these risk factors that have been implicated like being in good physical shape, smoking, they all may in the long term contribute and are positive, but there is not a clear guarantee. There is other factors that have become... is demonstrated. For instance, education. So, it’s very clear that if individuals that have longer years of education have some degree of protection compared with the ones that don’t. In fact, we have examined that in a particular study, the Nun Study. It’s very clear that in those subjects the issue of environment is really reduced to minimum. We could clearly see that the nuns that had a longer period of education had less risk of Alzheimer’s disease than the ones that were not, so there are many factors that usually apply in early life that can either increase or decrease the risk for Alzheimer’s disease.
Dr. Guarente: I've always been intrigued by the Nun Study and I wonder to what extent does that represent a sort of a reserve that people have who have had a lot of education and use their brains a lot and as opposed to really protecting at the level of individual neurons and the tissue itself?
Dr. Troncoso: What I can tell you is that when we looked at the group of nuns that had asymptomatic AD compared with the ones that had dementia, the number of those nuns that were in... that had graduate education it was significantly higher than the other ones. It was really an amazing difference.
Dr. Gandy: But as compelling as those data are they’ve still not randomized clinical trials, which is what we need to use to recommend to people what they can do. I mean it’s difficult to tell people in their 50s that they should have gone to graduate school.
Meryl Comer: Exercise, exercise, exercise, that is a prophylactic for many diseases, or proposed. Now the study comes out that walking a mile increases your gray matter. Why should I worry about gray matter in the brain?
Dr. Arancio: The philosophy behind it would be that if you exercise you increase the gray matter, the communication between the cells and strengthen the synapse, and build up the brain just like a muscle and that would help the time... during that time when there is damage to the brain, so you have more reserve to the brain. That could be the philosophy behind it, but with all of this what you have said and that is what Sam was saying, we should take everything being very cautious because none of these things vitamin, exercise, wine, et cetera have so far showed to have solved the problem. The fact is that people still get Alzheimer’s. Millions of people have it and we have not solved it. So it’s unlikely that any of these things that we have so far seen alone will have such a striking affect to solve the disease.
Studies have shown that you can boost brainpower and brain resilience with vitamins and exercise, and by not smoking. But lifestyle choices alone can't prevent Alzheimer's?
Explore how alcohol affects your brain, from the first sip at the bar to life-long drinking habits.
- Alcohol is the world's most popular drug and has been a part of human culture for at least 9,000 years.
- Alcohol's effects on the brain range from temporarily limiting mental activity to sustained brain damage, depending on levels consumed and frequency of use.
- Understanding how alcohol affects your brain can help you determine what drinking habits are best for you.
If you want to know what makes a Canadian lynx a Canadian lynx a team of DNA sequencers has figured that out.
- A team at UMass Amherst recently sequenced the genome of the Canadian lynx.
- It's part of a project intending to sequence the genome of every vertebrate in the world.
- Conservationists interested in the Canadian lynx have a new tool to work with.
If you want to know what makes a Canadian lynx a Canadian lynx, I can now—as of this month—point you directly to the DNA of a Canadian lynx, and say, "That's what makes a lynx a lynx." The genome was sequenced by a team at UMass Amherst, and it's one of 15 animals whose genomes have been sequenced by the Vertebrate Genomes Project, whose stated goal is to sequence the genome of all 66,000 vertebrate species in the world.
Sequencing the genome of a particular species of an animal is important in terms of preserving genetic diversity. Future generations don't necessarily have to worry about our memory of the Canadian Lynx warping the way hearsay warped perception a long time ago.
Artwork: Guillaume le Clerc / Wikimedia Commons
13th-century fantastical depiction of an elephant.
It is easy to see how one can look at 66,000 genomic sequences stored away as being the analogous equivalent of the Svalbard Global Seed Vault. It is a potential tool for future conservationists.
But what are the practicalities of sequencing the genome of a lynx beyond engaging with broad bioethical questions? As the animal's habitat shrinks and Earth warms, the Canadian lynx is demonstrating less genetic diversity. Cross-breeding with bobcats in some portions of the lynx's habitat also represents a challenge to the lynx's genetic makeup. The two themselves are also linked: warming climates could drive Canadian lynxes to cross-breed with bobcats.
John Organ, chief of the U.S. Geological Survey's Cooperative Fish and Wildlife units, said to MassLive that the results of the sequencing "can help us look at land conservation strategies to help maintain lynx on the landscape."
What does DNA have to do with land conservation strategies? Consider the fact that the food found in a landscape, the toxins found in a landscape, or the exposure to drugs can have an impact on genetic activity. That potential change can be transmitted down the generative line. If you know exactly how a lynx's DNA is impacted by something, then the environment they occupy can be fine-tuned to meet the needs of the lynx and any other creature that happens to inhabit that particular portion of the earth.
Given that the Trump administration is considering withdrawing protection for the Canadian lynx, a move that caught scientists by surprise, it is worth having as much information on hand as possible for those who have an interest in preserving the health of this creature—all the way down to the building blocks of a lynx's life.
The exploding popularity of the keto diet puts a less used veggie into the spotlight.
- The cauliflower is a vegetable of choice if you're on the keto diet.
- The plant is low in carbs and can replace potatoes, rice and pasta.
- It can be eaten both raw and cooked for different benefits.
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