Living Bacteria Create Hydrogen to Fight Cancer with Light Therapy
- Authors
- Yingyi Zhang, Xiaolian Deng, Lili Xia, Jianghui Liang, Meng Chen, Xiaoling Xu, Wei Chen, Jianwei Ding, Chengjie Yu, Limei Liu, Xiang Yang, Yiliang Lin, Fangfang Duan, Wei Feng, Yu Chen, Yu, Xiang Gao
- Journal
- Advanced Science
- Year
- 2024
- DOI
- 10.1002/advs.202408807
- Study Type
- Cell Culture
- Outcome
- Positive
- Peer Reviewed
- Yes
- Country
- China
- Health Condition
- Cancer
- Body System
- Whole Body
TL;DR
Scientists have used light-absorbing bacteria to produce hydrogen gas directly in tumors, killing cancer cells with heat and hydrogen while sparing healthy tissue.
Key Finding
Photosynthetic bacteria that produce hydrogen gas in response to near-infrared light can simultaneously generate therapeutic heat, offering a dual-mechanism approach to target cancer cells while sparing nearby healthy tissue.
Summary
Researchers tested a new cancer treatment approach using specially engineered bacteria that produce hydrogen gas when exposed to near-infrared light. The bacteria also convert that light into heat, creating a two-pronged attack on cancer cells while minimizing damage to surrounding healthy tissue. This study was conducted in cell cultures (not animals or humans) and showed promise for this combined hydrogen and heat-based therapy strategy.
Practical Takeaway
While this early-stage cell culture research suggests a potentially innovative way to deliver hydrogen therapy directly to tumors, it is far from clinical use. The study does not involve animals or humans, and many questions remain about safety, effectiveness, and feasibility in living organisms. This represents basic research that may eventually inform future cancer treatments, but should not be considered a near-term therapeutic option.
Abstract
Hydrogen gas (H2) therapy, recognized for its inherent biosafety, holds significant promise as an anti-cancer strategy. However, the efficacy of H2 treatment modalities is compromised by their reliance on systemic gas administration or chemical reactions generation, which suffers from low efficiency, poor targeting, and suboptimal utilization. In this study, living therapeutics are employed using photosynthetic bacteria Rhodobacter sphaeroides for in situ H2 production combined with near-infrared (NIR) mediated photothermal therapy. Living R. sphaeroides exhibits strong absorption in the NIR spectrum, effectively converting light energy into thermal energy while concurrently generating H2. This dual functionality facilitates the targeted induction of tumor cell death and substantially reduces collateral damage to adjacent normal tissues. The findings reveal that integrating hydrogen therapy with photothermal effects, mediated through photosynthetic bacteria, provides a robust, dual-modality approach that enhances the overall efficacy of tumor treatments. This living therapeutic strategy not only leverages the therapeutic potential of both hydrogen and photothermal therapeutic modalities but also protects healthy tissues, marking a significant advancement in cancer therapy techniques.