gut microbiome

Saturday Feeling Resilient – 06.22.24

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Resiliency

The researchers found that people in the high resiliency group were less anxious and depressed, less prone to judge, and had activity in regions of the brain associated with emotional regulation and better cognition compared to the group with low resiliency. “When a stressor happens, often we go to this aroused fight or flight response, and this impairs the breaks in your brain,” Gupta said. “But the highly resilient individuals in the study were found to be better at regulating their emotions, less likely to catastrophize, and keep a level head,” added Desiree Delgadillo, postdoctoral researcher and one of the first authors.

The high resiliency group also had different microbiome activity than the low resiliency group. Namely, the high resiliency group’s microbiomes excreted metabolites and exhibited gene activity associated with low inflammation and a strong and healthy gut barrier. A weak gut barrier, otherwise known as a leaky gut, is caused by inflammation and impairs the gut barrier’s ability to absorb essential nutrients needed by the body while blocking toxins from entering the gut.

University of California – Los Angeles Health Sciences. “Resiliency shaped by activity in the gut microbiome and brain.” ScienceDaily. http://www.sciencedaily.com/releases/2024/06/240621122904.htm (accessed June 22, 2024) https://www.sciencedaily.com/releases/2024/06/240621122904.htm

Resilience is the capacity to remain flexible and adaptable while facing life’s challenges. It is a complex concept involving traits, environmental factors, and a learned capacity that comes from experience. https://positivepsychology.com/what-is-resilience/

Gut Bacteria May Drive Colorectal Cancer Risk

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The researchers found signs that a high-fat, low-fiber diet may increase inflammation in the gut that prevents it from naturally suppressing tumors. The cells of young people with colorectal cancer also appeared to have aged more quickly — by 15 years on average — than a person’s actual age. That’s unusual, because older people with colorectal cancer don’t have the same boost in cellular aging.

The rate of colorectal cancer among young people has been rising at an alarming rate, according to a 2023 report from the American Cancer Society. In 2019, 1 in 5 colorectal cancer cases were among people younger than 55. That’s up from 1 in 10 in 1995, which means the rate has doubled in less than 30 years. Young People’s Gut Bacteria May Drive Colorectal Cancer Risk – Medscape – June 06, 2024 — https://www.medscape.com/s/viewarticle/young-peoples-gut-bacteria-may-drive-colorectal-cancer-risk-2024a1000amd?src=rss

Yikes.

Gut Bacteria Break Down Cholesterol

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It has been established that the human gut microbiome affects cholesterol levels, and previous research has pointed to microbial enzymes that might be involved. A 2020 study2 identified a bacterial enzyme called ismA that can convert cholesterol into coprostanol, a lipid that is excreted instead of absorbed by the body. People whose gut bacteria made this enzyme had lower cholesterol levels in their blood than did those who did not. This study was published by the same research group — led by gastroenterologist and microbiologist Ramnik Xavier at the Massachusetts General Hospital in Boston — that is responsible for the new finding. Until now, it was not clear which bacteria produced enzymes that metabolize cholesterol.

For the current study, the researchers analysed microbial genomes in stool samples from 1,429 participants in a long-term study of risk factors for cardiovascular disease. The team found many gut-bacteria species, including those in the genus Oscillibacter, that were correlated with lower cholesterol levels. The researchers confirmed their results in participants in two independent studies.

Gut bacteria break down cholesterol — hinting at probiotic treatments – https://www.nature.com/articles/d41586-024-00955-3

Not confirmed in animal models or clinical trials.

But an OTC supplement will arrive on store shelves before any scientific confirmation is achieved.

Exposome! (I Learned a New Word Today)

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In an extensive review, the team found that the early life exposome, which encompasses one’s diet, lifestyle, weight, environmental exposures, and microbiome, has changed substantially in the last several decades. Thus, they hypothesized that factors like the westernized diet and lifestyle may be contributing to the early-onset cancer epidemic…

Possible risk factors for early-onset cancer included alcohol consumption, sleep deprivation, smoking, obesity, and eating foods. Surprisingly, researchers found that while adult sleep duration hasn’t drastically changed over the several decades, children are getting far less sleep today than they were decades ago. Risk factors such as highly-processed foods, sugary beverages, obesity, type 2 diabetes, sedentary lifestyle, and alcohol consumption have all significantly increased since the 1950s, which researchers speculate has accompanied altered microbiome.

Cancers in adults under 50 on the rise globally – https://www.sciencedaily.com/releases/2022/09/220906161454.htm. Brigham and Women’s Hospital. “Cancers in adults under 50 on the rise globally: Researchers identify risks factors and trends behind an increasing incidence of early-onset cancers around the world.” ScienceDaily. (accessed September 7, 2022).

I’ve been cooking a lot this week and decided to give myself a break tonight. Grab a burger maybe some pizza.

Then I read this article.

Maybe I will cook tonight.

Eat More Fiber

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According to Dr. Sadeghi, fiber-rich foods are generally enough to boost and maintain a healthy gut biome. While companies claim to have packaged the secret to digestion via fermented foods—such as yogurt, sauerkraut, kombucha, wine, and cheese—the truth is there is no recognized scientific evidence to support these claims. Dr. Sadeghi stated, “There are no studies which have actually looked at whether these probiotics get incorporated into the gut mucosa or get discarded into the stool. In fact, we don’t even know for sure they aren’t harmful. In a recent study published in Cell, researchers looked at whether probiotics get incorporated into the mucosa post antibiotic therapy to restore gut health.[1] They did colonoscopies on two groups of individuals and samples their biome. Both groups received antibiotics. One group received probiotics and the other group did not receive probiotics. They wanted to know whether taking probiotics restored the health of the gut faster. To their surprise, the group that didn’t get probiotics recovered the biome faster!”

Gastroenterologist Busts Link Between Fermented Dairy and Gut Health

Link to Dr. Angie Sadeghi’s website.