Gut Bacteria might be an Indicator of Colon Cancer Risk

gut bacteria
Credit: CC0 Public Domain

A study published today in the journal Cell Host & Microbe reported that the increased presence of certain bacteria in a gut biome indicates a greater likelihood that colon polyps will become cancerous.

In his research, William DePaolo, associate professor at the University of Washington School of Medicine, tracked 40 patients who had undergone routine colonoscopies and had biopsies taken near the polyps to identify bacteria present at relatively higher levels compared with those of patients who were polyp-free. All the patients were between the ages 50 and 75, and 60% were women.

“The rising incidence of colorectal cancer is a major health concern, but little is known about the composition and role of microbiota associated with precancerous polyps,” the...

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This is what it looks like when a Black Hole Snacks on a Star

Illustration of a black hole shredding a star in a tidal disruption event
This illustration shows a glowing stream of material from a star, torn to shreds as it was being devoured by a supermassive black hole. The feeding black hole is surrounded by a ring of dust, not unlike the plate of a toddler is surrounded by crumbs after a meal.NASA/JPL-Caltech

While black holes and toddlers don’t seem to have much in common, they are remarkably similar in one aspect: Both are messy eaters, generating ample evidence that a meal has taken place.

But whereas one might leave behind droppings of pasta or splatters of yogurt, the other creates an aftermath of mind-boggling proportions. When a black hole gobbles up a star, it produces what astronomers call a “tidal disruption event...

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Microneedles Pierce biofilm for more effective Topical Delivery of Antibiotics to Infected Wounds

Rahim Rahimi’s flexible biodegradable microneedle array contains calcium peroxide. The microneedles pierce the biofilm layer of a wound and deliver the medicine to oxygenate the tissue and effectively eradicate biofilm infections on the wound. (Purdue University photo/Vincent Walter)

A Purdue University engineer’s patent-pending invention could improve the quality of life for millions of people suffering from diabetic foot ulcers.

Rahim Rahimi, an assistant professor in the School of Materials Engineering, has developed a flexible polymer composite microneedle array that can overcome the physicochemical bacterial biofilm present in chronic, nonhealing wounds and deliver both oxygen and bactericidal agents simultaneously...

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Burning Space Mystery Solved as researchers confirm Origins of ‘Empty Sky’ Gamma-rays

Burning space mystery solved as researchers confirm origins of ‘empty sky’ gamma-rays
A detailed view of the gamma-ray sky. Credit: NASA/DOE/Fermi LAT Collaboration

Star-forming galaxies are responsible for creating gamma-rays that until now had not been associated with a known origin, researchers from The Australian National University (ANU) have confirmed.

Lead author Dr. Matt Roth, from the ANU Research School of Astronomy and Astrophysics, said until now it has been unclear what created gamma-rays—one of the most energetic forms of light in the Universe—that appear in patches of seemingly “empty sky.”

The discovery could offer clues to help astronomers solve other mysteries of the Universe, such as what kind of particles make up Dark Matter—one of the holy grails of astrophysics.

“It’s a significant milestone to finally discover the origins of this ga...

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