Navigation Links
How bacteria found in mouth may cause colorectal cancer

Gut microbes have recently been linked to colorectal cancer, but it has not been clear whether and how they might cause tumors to form in the first place. Two studies published by Cell Press on August 14th in the journal Cell Host & Microbe reveal how gut microbes known as fusobacteria, which are found in the mouth, stimulate bad immune responses and turn on cancer growth genes to generate colorectal tumors. The findings could lead to more effective strategies for the early diagnosis, prevention, and treatment of colorectal cancer.

"Fusobacteria may provide not only a new way to group or describe colon cancers but also, more importantly, a new perspective on how to target pathways to halt tumor growth and spread," says senior study author Wendy Garrett of the Harvard School of Public Health and the Dana-Farber Cancer Institute.

Colorectal cancer is the second leading cause of cancer-related death in the United States. Recent studies have shown that fusobacteria from the mouth are also abundant in tissues from colorectal cancer patients. But until now, it was not known whether these microbes directly contribute to the formation of tumors.

In one of the new studies, Garrett, Matthew Meyerson of the Dana-Farber Cancer Institute, and their collaborators found that fusobacteria are prevalent in human adenomas -- benign tumors that can become malignant over time -- suggesting that these microbes contribute to early stages of tumor formation. In a mouse model of colorectal cancer, these bacteria accelerated the formation of tumors by attracting immune cells called myeloid cells, which invade tumors and stimulate inflammatory responses that can cause cancer.

In the second study, Yiping Han of Case Western Reserve University School of Dental Medicine and her collaborators discovered that fusobacteria rely on a molecule called Fusobacterium adhesin A (FadA), which is found on the surface of these bacterial cells, to attach to and invade human colorectal cancer cells. FadA then turns on cancer growth genes and stimulates inflammatory responses in these cells and promotes tumor formation.

Han and her team also found that FadA levels were much higher in tissues from patients with adenomas and colorectal cancer compared with healthy individuals. Moreover, they identified a compound that can prevent FadA's effects on cancer cells. "We showed that FadA is a marker that can be used for the early diagnosis of colorectal cancer and identified potential therapeutic targets to treat or prevent this common and debilitating disease," Han says.


Contact: Mary Beth O'Leary
Cell Press

Related medicine news :

1. Pharmacy Robots Linked to Bacterial Contamination of Drugs
2. Children with juvenile arthritis have higher rates of bacterial infection
3. University of Minnesota startup to treat challenging bacterial infection
4. Fish Pedicure a Recipe for Bacterial Infection, Researchers Warn
5. Zooming in on bacterial weapons in 3-D
6. Genomes show how Staph bacteria gain resistance to last-line drug
7. Cedars-Sinai physician definitively links irritable bowel syndrome and bacteria in gut
8. Killer stainless steel: New process gives icon of cleanliness antibacterial coating
9. Study Ties Kids Allergy Risks to Antibacterials, Preservatives
10. Rare Drug-Resistant Bacteria Spotted in U.S. Hospital
11. Eating garbage: Bacteria for bioremediation
Post Your Comments:
(Date:10/13/2017)... ... 2017 , ... The International Association of Eating Disorders Professionals ... the field of eating disorders, announces the opening of early registration for the ... at the Omni Resort at ChampionsGate. , The annual iaedp™ Symposium ...
(Date:10/13/2017)... ... October 13, 2017 , ... Lori R. Somekh, founder ... of ElderCounsel, a national organization of elder law and special needs planning attorneys. “Membership ... rules. It also provides a forum to network with elder law attorneys nationwide,” said ...
(Date:10/13/2017)... , ... October 13, 2017 , ... The Visiting Nurse ... Market. Featuring a collection of specialty vendors and unique items from across the nation, ... quality-focused health and wellness services offered by the VNA. The boutique will be ...
(Date:10/13/2017)... , ... October 13, 2017 , ... Yisrayl Hawkins, Pastor ... that explains one of the most popular and least understood books in the Holy ... and puzzling descriptions that have baffled scholars for centuries. Many have tossed it off ...
(Date:10/13/2017)... ... ... “The Journey: From the Mountains to the Mission Field”: the story of ... Philippines. “The Journey: From the Mountains to the Mission Field” is the creation of ... taught all ages and currently teaches a class of ladies at her church, which ...
Breaking Medicine News(10 mins):
(Date:10/10/2017)... , Oct. 10, 2017  NDS received FDA 510(k) clearance ... a medical-grade battery-powered display stand specifically designed for endoscopy environments. An ... technology into a clinical solution to support the improvement of patient ... Innovative Design ... Wireless Solution ...
(Date:10/4/2017)...  South Korean-based healthcare product Development Company I.M. Lab ... Kickstarter. The device will educate the user about ,proper, ... efficiency compared to the dated and pricey CPR training ... of the compression for a more informed CPR training. ... raise $5,000. cprCUBE ...
(Date:10/2/2017)... Lilly and Company (NYSE: LLY ) will ... 2017 on Tuesday, October 24, 2017. Lilly will also ... investment community and media to further detail the company,s ... at 9 a.m. Eastern time. Investors, media and the ... conference call through a link that will be posted ...
Breaking Medicine Technology: