Nav: Home

Gut microbes may affect the course of ALS

July 22, 2019

Researchers at the Weizmann Institute of Science have shown in mice that intestinal microbes, collectively termed the gut microbiome, may affect the course of amyotrophic lateral sclerosis (ALS), also known as Lou Gehrig's disease. As reported today in Nature, progression of an ALS-like disease was slowed after the mice received certain strains of gut microbes or substances known to be secreted by these microbes. Preliminary results suggest that the findings on the regulatory function of the microbiome may be applicable to human patients with ALS.

"Our long-standing scientific and medical goal is to elucidate the impact of the microbiome on human health and disease, with the brain being a fascinating new frontier," says Prof. Eran Elinav of the Immunology Department. His team performed the study together with that of Prof. Eran Segal of the Computer Science and Applied Mathematics Department. Segal elaborates: "Given increasing evidence that microbiome affects brain function and disease, we wanted to study its potential role in ALS." The study was led by postdoctoral fellows Drs. Eran Blacher and Stavros Bashiardes, and by staff scientist Dr. Hagit Shapiro, all in the Elinav lab. They collaborated with Dr. Daphna Rothschild, a postdoctoral fellow in Eran Segal's lab, and Dr. Marc Gotkine, Head of the Motor Neuron Disease Clinic at Hadassah Medical Center, as well as with other scientists from Weizmann and elsewhere.

The scientists started out demonstrating in a series of experiments that the symptoms of an ALS-like disease in transgenic mice worsened after these mice were given broad-spectrum antibiotics to wipe out a substantial portion of their microbiome. In addition, the scientists found that growing these ALS-prone mice in germ-free conditions (in which, by definition, mice carry no microbiome of their own), is exceedingly difficult, as these mice had a hard time surviving in the sterile environment. Together, these results hinted at a potential link between alterations in the microbiome and accelerated disease progression in mice that were genetically susceptible to ALS.

Next, using advanced computational methods, the scientists characterized the composition and function of the microbiome in the ALS-prone mice, comparing them to regular mice. They identified 11 microbial strains that became altered in ALS-prone mice as the disease progressed or even before the mice developed overt ALS symptoms. When the scientists isolated these microbial strains and gave them one by one - in the form of probiotic-like supplements - to ALS-prone mice following antibiotic treatment, some of these strains had a clear negative impact on the ALS-like disease. But one strain, Akkermansia muciniphila, significantly slowed disease progression in the mice and prolonged their survival.

To reveal the mechanism by which Akkermansia may be producing its effect, the scientists examined thousands of small molecules secreted by the gut microbes. They zeroed in on one molecule called nicotinamide (NAM): Its levels in the blood and in the cerebrospinal fluid of ALS-prone mice were reduced following antibiotic treatment and increased after these mice were supplemented with Akkermansia, which was able to secrete this molecule. To confirm that NAM was indeed a microbiome-secreted molecule that could hinder the course of ALS, the scientists continuously infused the ALS-prone mice with NAM. The clinical condition of these mice improved significantly. A detailed study of gene expression in their brains suggested that NAM improved the functioning of their motor neurons.
-end-
Also taking part in the study were Uria Mor, Dr. Mally Dori-Bachash, Dr. Christian Kleimeyer, Claudia Moresi, Yotam Harnik, Maya Zur, Rotem Ben-Zeev Brik, Dr. Denise Kviatcovsky, Dr. Niv Zmora, Yotam Cohen and Dr. Nira Amar of the Immunology Department; Noam Bar and Izhak Levi of the Molecular Cell Biology Department and Computer Science and Applied Mathematics Department; Prof. Michal Schwartz of the Neurobiology Department; Tevie Mehlman and Dr. Alexander Brandis of the Life Sciences Core Facilities Department; Dr. Inbal Biton, Dr. Yael Kuperman, Dr. Michael Tsoory and Prof. Alon Harmelin of the Veterinary Resources Department; Michal Zabari of the Department of Neurology, Hadassah-Hebrew University Medical Center; Leenor Alfahel and Prof. Adrian Israelson of the Department of Physiology and Cell Biology, Ben-Gurion University of the Negev; and Dr. Liisa Arike, Dr. Malin E.V. Johansson and Prof. Gunnar C. Hansson of the Department of Medical Biochemistry and Cell Biology, University of Gothenburg, Sweden.

Prof. Eran Elinav's research is supported by the Leona M. and Harry B. Helmsley Charitable Trust; the Adelis Foundation; the Pearl Welinsky Merlo Scientific Progress Research Fund; the Else Kroener Fresenius Foundation; the Lawrence and Sandra Post Family Foundation; Yael and Rami Ungar; the Daniel Morris Trust; the estate of Bernard Bishin for the WIS-Clalit Program; the Park Avenue Charitable Fund; the Hanna and Dr. Ludwik Wallach Cancer Research Fund; Donald and Susan Schwarz; the Howard and Nancy Marks Charitable Fund; the estate of Malka Moskowitz; the estate of Myron H. Ackerman; Aliza Moussaieff; and the European Research Council. Prof. Elinav is the Incumbent of the Sir Marc and Lady Tania Feldmann Professorial Chair.

Prof. Eran Segal's research is supported by the Crown Human Genome Center, which he heads; the Leona M. and Harry B. Helmsley Charitable Trust; the Else Kroener Fresenius Foundation; the Adelis Foundation; Judith Benattar; Aliza Moussaieff; the Fannie Sherr Fund; the estate of Zvia Zeroni; and the European Research Council.

The Weizmann Institute of Science in Rehovot, Israel, is one of the world's top-ranking multidisciplinary research institutions. Noted for its wide-ranging exploration of the natural and exact sciences, the Institute is home to scientists, students, technicians and supporting staff. Institute research efforts include the search for new ways of fighting disease and hunger, examining leading questions in mathematics and computer science, probing the physics of matter and the universe, creating novel materials and developing new strategies for protecting the environment.

Weizmann Institute of Science

Related Microbes Articles:

A new look at deep-sea microbes
Microbes found deeper in the ocean are believed to have slow population turnover rates and low amounts of available energy.
Microbes might manage your cholesterol
Researchers discover a link between human blood cholesterol levels and a gene in the microbiome that could one day help people manage their cholesterol through diet, probiotics, or entirely new types of treatment.
Can your gut microbes tell you how old you really are?
Harvard longevity researchers in collaboration with Insilico Medicine develop the first AI-powered microbiomic aging clock
What can be learned from the microbes on a turtle's shell?
Research published in the journal Microbiology has found that a unique type of algae, usually only seen on the shells of turtles, affects the surrounding microbial communities.
Life, liberty -- and access to microbes?
Poverty increases the risk for numerous diseases by limiting people's access to healthy food, environments and stress-free conditions.
Rye is healthy, thanks to an interplay of microbes
Eating rye comes with a variety of health benefits. A new study from the University of Eastern Finland now shows that both lactic acid bacteria and gut bacteria contribute to the health benefits of rye.
Gut microbes may affect the course of ALS
Researchers isolated a molecule that may be under-produced in the guts of patients.
Gut microbes associated with temperament traits in children
Scientists in the FinnBrain research project of the University of Turku discovered that the gut microbes of a 2.5-month-old infant are associated with the temperament traits manifested at six months of age.
Gut microbes eat our medication
Researchers have discovered one of the first concrete examples of how the microbiome can interfere with a drug's intended path through the body.
Microbes can grow on nitric oxide
Nitric oxide (NO) is a central molecule of the global nitrogen cycle.
More Microbes News and Microbes Current Events

Trending Science News

Current Coronavirus (COVID-19) News

Top Science Podcasts

We have hand picked the top science podcasts of 2020.
Now Playing: TED Radio Hour

Debbie Millman: Designing Our Lives
From prehistoric cave art to today's social media feeds, to design is to be human. This hour, designer Debbie Millman guides us through a world made and remade–and helps us design our own paths.
Now Playing: Science for the People

#574 State of the Heart
This week we focus on heart disease, heart failure, what blood pressure is and why it's bad when it's high. Host Rachelle Saunders talks with physician, clinical researcher, and writer Haider Warraich about his book "State of the Heart: Exploring the History, Science, and Future of Cardiac Disease" and the ails of our hearts.
Now Playing: Radiolab

Insomnia Line
Coronasomnia is a not-so-surprising side-effect of the global pandemic. More and more of us are having trouble falling asleep. We wanted to find a way to get inside that nighttime world, to see why people are awake and what they are thinking about. So what'd Radiolab decide to do?  Open up the phone lines and talk to you. We created an insomnia hotline and on this week's experimental episode, we stayed up all night, taking hundreds of calls, spilling secrets, and at long last, watching the sunrise peek through.   This episode was produced by Lulu Miller with Rachael Cusick, Tracie Hunte, Tobin Low, Sarah Qari, Molly Webster, Pat Walters, Shima Oliaee, and Jonny Moens. Want more Radiolab in your life? Sign up for our newsletter! We share our latest favorites: articles, tv shows, funny Youtube videos, chocolate chip cookie recipes, and more. Support Radiolab by becoming a member today at Radiolab.org/donate.