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Updated: May 8, 2026
Polymalic Acid-based Nano Biopolymers for Targeting of Multiple Tumor Markers: An Opportunity for Personalized Medicine?
Published on: June 13, 2014
The targeting nanothin polyelectrolyte shells in system with immobilized bacterial cells for antitumor factor
L H Granicka1, M Borkowska, A Grzeczkowicz
1M. Nałęcz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Science, Warsaw, Poland.
Abstract:
Development of anticancer treatment strategies is ongoing considering still inadequate efficiency of existing anticancer therapeutics. Moreover, the lack of therapeutic agents selectivity against the tumor cells requires further investigations into novel anticancer strategies. The use of pathogenic microorganisms producing an oncolytic agent may be an approach for apoptotic therapy in cancer treatment. The purpose of this study was to investigate the targeting efficiency of Bacillus subtilis bacterial cells coated with modified polyelectrolyte shells applied to protect the bacterial cells from potential host immune response as well as to enhance the tumor-targeting efficiency. The shells were modified with transferrin to increase affinity toward the target tumor cells. The impact of bacterial cells coated with unmodified or modified nanothin shells on human leukemia cells was evaluated in vitro. It was observed that the bacterial cells coated with modified shells with incorporated transferrin exhibited stronger lethal impact on leukemia cells as compared to bacterial cells with unmodified shell coating. Applied modified membrane conformation allowing for functioning of encapsulated microorganisms may find potential use in local antitumor treatment purposes.
Insights
Researchers explored using modified Bacillus subtilis bacteria to target cancer cells. Transferrin-coated bacteria showed a stronger lethal effect on leukemia cells, suggesting potential for novel cancer therapies.
Area of Science:
- Oncology
- Biotechnology
- Microbiology
Background:
- Current anticancer treatments face challenges with efficiency and tumor cell selectivity.
- Novel strategies are needed to improve cancer therapy outcomes.
- Oncolytic agents from microorganisms offer a potential approach for apoptotic cancer therapy.
Purpose of the Study:
- To evaluate the tumor-targeting efficiency of Bacillus subtilis bacterial cells coated with modified polyelectrolyte shells.
- To assess the protective effect of shells against host immune response.
- To enhance tumor-targeting capability using transferrin modification.
Main Methods:
- Bacillus subtilis cells were coated with unmodified and transferrin-modified polyelectrolyte nanothin shells.
- In vitro experiments were conducted to evaluate the impact on human leukemia cells.
- Shell modification involved incorporating transferrin to increase affinity for tumor cells.
Main Results:
- Bacterial cells coated with modified shells demonstrated a significantly stronger lethal impact on leukemia cells compared to those with unmodified shells.
- Transferrin incorporation enhanced the targeting and cytotoxic effects of the bacterial agent.
- The modified shell conformation maintained the functionality of the encapsulated microorganisms.
Conclusions:
- Transferrin-modified Bacillus subtilis shows enhanced efficacy in targeting and inducing apoptosis in leukemia cells.
- This approach holds promise for developing targeted anticancer treatments.
- The modified bacterial system may be applicable for local antitumor therapy.
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