Bacterial protein toxins in human cancers
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Updated: Mar 30, 2026

Bioluminescent Bacterial Imaging In Vivo
Published on: November 4, 2012
Francesca Rosadi1, Carla Fiorentini1, Alessia Fabbri2
1Department of Therapeutic Research and Medicines Evaluation, Istituto Superiore di Sanità, 00161 Rome, Italy.
Abstract:
Many bacteria causing persistent infections produce toxins whose mechanisms of action indicate that they could have a role in carcinogenesis. Some toxins, like CDT and colibactin, directly attack the genome by damaging DNA whereas others, as for example CNF1, CagA and BFT, impinge on key eukaryotic processes, such as cellular signalling and cell death. These bacterial toxins, together with other less known toxins, mimic carcinogens and tumour promoters. The aim of this review is to fulfil an up-to-date analysis of toxins with carcinogenic potential that have been already correlated to human cancers. Bacterial toxins-induced carcinogenesis represents an emerging aspect in bacteriology, and its significance is increasingly recognized.
Insights
Certain bacterial toxins from persistent infections can cause cancer by damaging DNA or disrupting cell processes. This review analyzes toxins linked to human cancers, highlighting bacterial toxins as an emerging cause of carcinogenesis.
Area of Science:
- Microbiology
- Oncology
- Toxicology
Background:
- Persistent bacterial infections are linked to chronic diseases.
- Bacterial toxins can possess carcinogenic properties.
- Some toxins directly damage DNA, while others affect cell signaling and death.
Purpose of the Study:
- To provide an updated analysis of bacterial toxins with carcinogenic potential.
- To review toxins correlated with human cancers.
- To highlight the emerging role of bacterial toxins in carcinogenesis.
Main Methods:
- Literature review of scientific articles.
- Analysis of bacterial toxins' mechanisms of action.
- Correlation of toxins with human cancer development.
Main Results:
- Identified bacterial toxins that directly damage DNA (e.g., CDT, colibactin).
- Identified toxins affecting eukaryotic cell processes (e.g., CNF1, CagA, BFT).
- Established mimicry of carcinogens and tumor promoters by bacterial toxins.
Conclusions:
- Bacterial toxins are increasingly recognized as significant contributors to carcinogenesis.
- Understanding these toxins is crucial for cancer prevention and treatment.
- Bacterial toxins-induced carcinogenesis is a growing area of research in bacteriology.
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