Gut bacteria from amphibians and reptiles achieve complete tumor elimination in preclinical model – Medical Xpress

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Mechanisms underlying Ewingella americana antitumor effects. Credit: Eijiro Miyako from JAIST.

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Q1: What role does Ewingella americana play in antitumor effects in amphibians and reptiles?

A1: Ewingella americana, a type of gut bacteria found in amphibians and reptiles, has been studied for its antitumor effects. The bacteria appear to modulate the immune system, potentially enhancing the body's natural ability to fight tumors. This research is part of ongoing studies to understand how certain gut microbiomes can aid in cancer treatment by leveraging their natural properties to eliminate tumors.

Q2: How does the gut microbiome influence cancer treatment according to recent studies?

A2: Recent studies have indicated that the gut microbiome can play a significant role in cancer treatment. Microbes within tumors, such as those found in the intratumoral microbiome, can influence cancer progression and treatment outcomes. They contribute to cancer initiation and progression by inducing genomic instability and modulating immune responses. This opens pathways for using microbiome modulation as a therapeutic strategy to enhance cancer treatments.

Q3: What are the potential therapeutic applications of cold atmospheric plasma (CAP) in cancer treatment?

A3: Cold atmospheric plasma (CAP) has shown promise in enhancing the immune system's response to cancer. CAP treatment can activate macrophages and T-cells, leading to improved antigen presentation and effector functions. This non-toxic method disrupts tolerogenic pathways, increases pro-inflammatory cytokines, and reduces inhibitory molecules, making it a potential adjunct in T-cell adoptive immunotherapies.

Q4: What novel methodologies are being used to study the intratumoral microbiome in colorectal cancer?

A4: Advanced methodologies such as single-cell technologies, high-resolution sequencing, and multi-omic integration are being utilized to study the intratumoral microbiome in colorectal cancer. These methods help unravel the complex interactions between microbial communities and tumor cells, providing insights into how microbiomes contribute to cancer progression and potential therapeutic targets.

Q5: How does the gut microbiome alter the immune system's response to tumors?

A5: The gut microbiome can influence the immune system's response to tumors by modulating immune signaling pathways and cytokine production. It can either enhance or suppress immune responses depending on the microbial composition. This interaction is crucial for developing microbiome-based therapies to improve immune-mediated tumor clearance.

Q6: What are the implications of using synthetic bacteria in cancer therapy?

A6: Synthetic bacteria engineered for cancer therapy hold promise as targeted living therapeutics. These bacteria can be designed to specifically target tumor cells, deliver therapeutic agents, and modulate the immune response. This approach aims to improve precision in cancer treatment, reduce side effects, and enhance the efficacy of existing therapies.

Q7: How might microbiome modulation enhance conventional cancer therapies?

A7: Microbiome modulation can enhance conventional cancer therapies by altering the tumor microenvironment, boosting immune responses, and reducing inflammation. By selectively enhancing beneficial microbes or suppressing pathogenic ones, treatments can be more effective, potentially leading to better patient outcomes and reduced resistance to therapies.

References:

  • Experimental Researches of Cutaneous Melanoma Immunotherapy by Antitumor Cell-Whole GM-CSF-Producing Vaccines
  • Enhancing Innate and Adaptive Immune Systems by Cold Atmospheric Plasma (CAP) and Its Antitumor Immunity
  • Intratumoral microbiome: a crucial regulating factor in development and progression of colorectal cancer
  • Odorrana graminea - Wikipedia