Breaking News
November 18, 2018 - Consensus Statement Issued on Management of Foot, Ankle Gout
November 18, 2018 - Fine particle air pollution is a public health emergency hiding in plain sight
November 18, 2018 - In-hospital mortality higher among patients with drug-resistant infections
November 17, 2018 - Research shines new, explanatory light on link between obesity and cancer
November 17, 2018 - FIND explores new diagnostic assays for confirmatory HCV diagnosis in community settings
November 17, 2018 - Tracking Preemies’ Head Size May Yield IQ Clues
November 17, 2018 - Scientists call for unified standards in 3-D genome and epigenetic data
November 17, 2018 - Lab Innovations 2018 has beaten all records by attracting 3,113 attendees
November 17, 2018 - Sexuality education before age 18 may reduce risk of sexual assault in college
November 17, 2018 - Lab Innovations 2018 confirmed as a major hit with visitors, exhibitors and speakers
November 17, 2018 - Largest parasitic worm genetic study hatches novel treatment possibilities
November 17, 2018 - Static and dynamic physical activities offer varying protection against heart disease
November 17, 2018 - Obesity significantly increases risk of Type 2 diabetes and coronary artery disease
November 17, 2018 - People with rare cancers can benefit from genomic profiling, shows research
November 17, 2018 - NIH awards over $1.8 million to husband-and-wife doctors to test new breast cancer approach
November 17, 2018 - Four-in-one antibody used to fight flu shows promise in mice
November 17, 2018 - New approach allows pathogens to be starved by blocking important enzymes
November 17, 2018 - Higher body mass index could cause depression even without health problems
November 17, 2018 - Protein which plays role in sensing cell damage serves as new target to treat pulmonary hypertension
November 17, 2018 - FDA Approves Adcetris (brentuximab vedotin) in Combination with Chemotherapy for Adults with Previously Untreated Systemic Anaplastic Large Cell Lymphoma or Other CD30-Expressing Peripheral T-Cell Lymphomas
November 17, 2018 - ID specialist input improves outcomes for outpatient parenteral antimicrobial therapy
November 17, 2018 - UT Southwestern scientists selected to receive 2019 Edith and Peter O’Donnell Awards
November 17, 2018 - New clinical algorithm to help individuals manage type 2 diabetes when fasting during Ramadan
November 17, 2018 - Researchers identify LZTR1 as evolutionarily conserved component of RAS pathway
November 17, 2018 - Heart Disease Leading Cause of Death in Low-Income Counties
November 17, 2018 - Estrogen Levels Test: MedlinePlus Lab Test Information
November 17, 2018 - Research reveals link between immunity, diabetes
November 17, 2018 - Research shows how to achieve improved smoking cessation outcomes within California’s Medicaid population
November 17, 2018 - New study finds less understanding and implementation of patient engagement
November 17, 2018 - New shoe insole technology could help diabetic ulcers heal better while walking
November 17, 2018 - New method to extend cell division and immortalization of avian-derived cells
November 17, 2018 - Australian Academy of Science urges parents to vaccinate children against meningococcal disease
November 17, 2018 - Hot water treatment may help improve inflammation and metabolism in sedentary people
November 17, 2018 - Researchers produce 3D chemical maps of small biological samples
November 17, 2018 - Must Blood Pressure Rise Wth Age? Remote Tribes Hold Clues
November 17, 2018 - Noonan Syndrome
November 17, 2018 - Interventions to delay and prevent type 2 diabetes are underused, researchers say
November 17, 2018 - Hackathon prize winner seeks to remotely monitor patient skin conditions
November 17, 2018 - Research team identifies Ashkenazi Jewish founder mutation for Leigh syndrome
November 17, 2018 - Gene editing could be used to halt kidney disease in patients with Joubert syndrome
November 17, 2018 - Study uncovers link between gut disruption and aging
November 17, 2018 - Teens more likely to pick up smoking after exposure from friends and family
November 17, 2018 - Nicoya designate the Institute for Stem Cell Biology and Regenerative Medicine as the OpenSPR Centre of Excellence
November 17, 2018 - new horizon in dental, oral and craniofacial research
November 17, 2018 - How does poor air quality affect your health?
November 17, 2018 - New device can regulate children’s blood glucose more like natural pancreas
November 17, 2018 - Game-Changers in Western Blotting and Protein Analysis
November 17, 2018 - FDA announces new actions to limit sale of e-cigarettes to youth
November 17, 2018 - Warmer winter temperatures related to higher crime rates
November 17, 2018 - MCO places increasing emphasis on helping people find and access healthy food
November 17, 2018 - Group of students aim to improve malaria diagnosis using old smartphones
November 17, 2018 - Transplantation of feces may protect preterm children from deadly bowel disease
November 17, 2018 - Researchers explore whether low-gluten diets can be recommended for people without allergies
November 17, 2018 - New and better marker for assessing patients after cardiac arrest
November 17, 2018 - For 7-year-old with failing bone marrow, a life-saving transplant | News Center
November 17, 2018 - New first-line treatment for peripheral T-cell lymphoma approved by FDA
November 17, 2018 - Artificial intelligence could be valuable tool to help young victims disclose traumatic testimony
November 17, 2018 - Breakthrough in the treatment of Restless Legs Syndrome
November 16, 2018 - FDA Approves Keytruda (pembrolizumab) for the Treatment of Patients with Hepatocellular Carcinoma (HCC) Who Have Been Previously Treated with Sorafenib
November 16, 2018 - Eagle Books | Native Diabetes Wellness Program
November 16, 2018 - Patients with common heart failure more likely to have lethal heart rhythms
November 16, 2018 - How AI could help veterinarians code their notes | News Center
November 16, 2018 - Bias-based bullying does more harm to students than generalized bullying
November 16, 2018 - Researchers find first direct evidence that cerebellum plays role in cognitive functions
November 16, 2018 - Non-coding genetic variant plays key role in endothelial function and disease incidence
November 16, 2018 - EMA recommends first all-oral treatment to tackle deadly sleeping sickness
November 16, 2018 - Drug used to treat dizziness may slow down growth of triple-negative breast cancer
November 16, 2018 - AHA: Icosapent Ethyl Cuts CV Risk From Elevated Triglycerides
November 16, 2018 - ‘Orphan’ RNAs make cancer deadlier, but potentially easier to diagnose
November 16, 2018 - Air Cube touches down at hospital | News Center
November 16, 2018 - CRISPR-based tool shown to enhance cell-based immunotherapy
November 16, 2018 - Mechanisms that govern HIV latency differ in the gut and blood, finds study
November 16, 2018 - Researchers unravel mystery of NPM1 protein in acute myeloid leukemia
November 16, 2018 - High school students less likely to select milk, fruit for lunch when fruit juice is available
November 16, 2018 - Football coaches with great emotional competence are more successful
November 16, 2018 - Researchers awarded $10 million grant to address root causes of asthma in Puerto Rico
November 16, 2018 - Personalized scheduling of radiotherapy using genetic data could reduce side effects
November 16, 2018 - American Cancer Society study links social isolation to higher mortality risk
November 16, 2018 - Health Tip: Manage Morning Sickness
November 16, 2018 - Long term exposure to road traffic noise linked with greater obesity risk
Study suggests colon cancer cells carry bacteria with them when they metastasize

Study suggests colon cancer cells carry bacteria with them when they metastasize

image_pdfDownload PDFimage_print
Credit: Baylor College of Medicine

(Medical Xpress)—A team of researchers working at Harvard University has found evidence that suggests a certain type of bacteria found in colon cancer tumors makes its way to tumors in other body parts by traveling with the metastasizing cells. In their paper published in the journal Science, the group describes their study of the bacteria and its possible link to being a cause of colon cancer.

Prior research has shown that bacteria exist alongside tumor cells for various types of cancers, causing some in the medical field to wonder if they are actually the cause of tumor formation. One such type of bacteria, Fusobacterium nucleatum, has been found to exist alongside colon cancer tumor cells. In this new effort, the researchers wondered if the same bacteria might exist alongside colon cancer tumor cells that have migrated to another part of the body, specifically, the liver.

To find out, the researchers collected tissue samples from actual patients. In so doing, they found that in many cases the same strain of bacteria was present in tumors in both the colon and liver in patients where the cancer had metastasized. They also found that patients who had colon cancer but had no evidence of the bacteria in their tumors, also did not have the bacteria in their liver tumors.

Intrigued by the findings, the researchers implanted tumors from human patients into healthy rats. In so doing they found that those tumors which also had the bacteria took hold and began growing. Those tumors that did not have the bacteria, on the other hand, failed to take hold. The team next tested the possibility of treating the colon cancer in mice by treating them with an antibiotic known to kill F. nucleatum. They found that doing so did indeed slow the growth of the tumor.

In looking at all of their findings, the researchers suggest that it appears that the bacteria do travel with the tumor cells to a new site and remain with new tumors that develop in those sites. They suggest further that it might be possible that the bacteria aides in colonization at the new site. More research will be done, of course, to determine if the bacteria actually play a role in the development of tumors.


Explore further:
Bacteria protect intestinal tumor model from being killed by immune cells

More information:
Susan Bullman et al. Analysis ofFusobacteriumpersistence and antibiotic response in colorectal cancer, Science (2017). DOI: 10.1126/science.aal5240

Abstract

Colorectal cancers comprise a complex mixture of malignant cells, non-transformed cells and microorganisms. Fusobacterium nucleatum is among the most prevalent bacterial species in colorectal cancer tissues. Here we show that colonization of human colorectal cancers with Fusobacterium and its associated microbiome, including Bacteroides, Selenomonas and Prevotella species, is maintained in distal metastases, demonstrating microbiome stability between paired primary-metastatic tumors. In situ hybridization analysis revealed that Fusobacterium is predominantly associated with cancer cells in the metastatic lesions. Mouse xenografts of human primary colorectal adenocarcinomas were found to retain viable Fusobacterium and its associated microbiome through successive passages. Treatment of mice bearing a colon cancer xenograft with the antibiotic metronidazole reduced Fusobacterium load, cancer cell proliferation and overall tumor growth. These observations argue for further investigation of antimicrobial interventions as a potential treatment for patients with Fusobacterium-associated colorectal cancer.

Journal reference:
Science

Tagged with:

About author

Related Articles