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Related Concept Videos

Biofilms01:29

Biofilms

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Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
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Mutagenicity and Carcinogenicity01:25

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Mutagenicity and carcinogenicity refer to the ability of drugs to cause genetic defects and induce cancer, respectively. The International Agency for Research on Cancer (IARC) classifies agents into four groups based on their carcinogenic potential. Group 1 agents are known human carcinogens; group 2A agents are probably carcinogenic to humans; group 3 agents lack data to support their role in carcinogenesis; and group 4 includes agents for which data support that they are not likely to be...
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Colonisation of Pathogens01:25

Colonisation of Pathogens

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Pathogen colonization of host tissues is a critical step in the development of infectious diseases. Various pathogenic microorganisms, including bacteria, fungi, viruses, and protozoa, have evolved complex strategies to attach to, invade, and persist within host environments. These mechanisms enable pathogens to establish infections, evade immune responses, and resist antimicrobial treatments.Attachment to Host CellsIn bacteria, colonization typically begins with adherence to host epithelial...
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Gene Regulation in Microbial Communities: Quorum Sensing01:28

Gene Regulation in Microbial Communities: Quorum Sensing

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Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
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Bacterial Signaling01:30

Bacterial Signaling

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Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
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Cancer Prevention02:59

Cancer Prevention

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Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
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Related Experiment Video

Updated: Mar 24, 2026

Development of a Polymicrobial Colony Biofilm Model to Test Antimicrobials in Cystic Fibrosis
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Do biofilms confer a pro-carcinogenic state?

Christine M Dejea1, Cynthia L Sears1,2

  • 1a Department of Oncology , Kimmel Comprehensive Cancer Center, Johns Hopkins Medical Institutions , Baltimore , MD , USA.

Gut Microbes
|March 5, 2016
PubMed
Summary
This summary is machine-generated.

The gut microbiota, specifically its organization into biofilms, is linked to colon cancer. A metabolite, N(1), N(12)-diacetylspermine, found in these biofilms may serve as a novel marker for colon neoplasia.

Keywords:
bacteroidesbiofilmcolorectal cancerescherichia colifusobacteriummicrobiomescreening colonoscopy

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Area of Science:

  • Microbiology and Oncology
  • Gut Microbiome Research
  • Cancer Pathogenesis

Background:

  • The human microbiota is increasingly recognized for its role in diseases like obesity, cancer, and inflammatory bowel disease.
  • The contribution of the microbiota to colon cancer development has been a long-standing hypothesis.
  • Recent research highlights the significance of microbial organization in disease states.

Purpose of the Study:

  • To investigate the role of mucosal microbiota organization in human colon cancer.
  • To identify potential biomarkers associated with microbiota-driven colon cancer.
  • To explore the utility of specific metabolites in detecting colon neoplasia.

Main Methods:

  • Analysis of mucosal microbiota organization in human colon cancer samples.
  • Detection and characterization of microbial metabolites in biofilm-positive colon mucosa.
  • Comparative analysis of metabolite levels between healthy and cancerous colon tissues.

Main Results:

  • A subset of human colon cancer is characterized by the organization of the mucosal microbiota into biofilms.
  • Biofilm-positive colon mucosa in cancer patients contains the polyamine metabolite N(1), N(12)-diacetylspermine.
  • This metabolite is infrequently detected in non-biofilm associated or healthy colon mucosa.

Conclusions:

  • The formation of microbiota biofilms is a significant feature in a subset of human colon cancers.
  • N(1), N(12)-diacetylspermine is a potential biomarker for identifying colon neoplasia.
  • Further research is warranted to validate N(1), N(12)-diacetylspermine as a clinical marker for colon cancer detection.