IIT BHU Scientists Develop Green Light Tech to Fight Infections
Researchers at IIT BHU have developed a novel green light-activated technology to fight bacterial infections and disrupt stubborn biofilms.
In a major breakthrough for modern healthcare, scientists at the Indian Institute of Technology (BHU), Varanasi, have developed an innovative light-activated technology designed to combat bacterial infections and accelerate wound healing. This research, which addresses the growing global threat of antimicrobial resistance, has been published in the prestigious international journal Communications Chemistry, part of the globally recognised Nature Portfolio.
A New Weapon Against Superbugs
The research team, led by a collaborative effort between Dr. Samya Banerjee from the Department of Chemistry and Dr. Sudip Mukherjee from the School of Biomedical Engineering, has focused on a method that uses specific light frequencies to trigger antibacterial action. The study, titled “Green-light-activated Os(II) metallophotoantibiotics for antibacterial therapy and infected wound healing,” introduces a scientific approach to tackling persistent infections that often resist traditional medicine.
The interdisciplinary team includes Apurba Mandal, Debayani Chakraborty, Arif Ali Mandal, Rohit Pandey, Ashish Kumar Agrawal, Rashi Gautam, and Sweety Tiwari. By combining expertise in chemistry, biomedical engineering, and pharmaceutical engineering, they have created a solution that targets the very core of bacterial survival.
How the Green Light Technology Works
The core of this innovation lies in three specialised chemical compounds known as osmium-based metallophotoantibiotics, specifically designated as Os1, Os2, and Os3. These compounds are designed to remain stable until they are exposed to green light.
Once the green light hits these compounds, a chemical reaction occurs that generates reactive oxygen species (ROS). These are highly reactive molecules that act like microscopic weapons, damaging bacterial cells and disrupting their essential biological processes. This mechanism effectively inhibits bacterial growth and prevents them from multiplying.
Breaking Through Protective Biofilms
One of the most significant hurdles in treating infections is the formation of biofilms. These are protective layers that bacteria build around themselves, making them incredibly difficult to eliminate with standard antibiotics. Biofilms are a major concern in healthcare settings, especially regarding infections related to medical devices.
The IIT BHU research demonstrated that their developed compounds could successfully penetrate and disrupt these layers:
- The team tested the compounds against three major bacterial species: Escherichia coli (E. coli), Staphylococcus aureus, and Bacillus subtilis.
- Among the candidates, Os1 emerged as the most powerful and promising compound.
- In laboratory experiments, the Os1 compound, when activated by green light, achieved approximately 85 per cent inhibition of biofilm formation in both E. coli and Bacillus subtilis.
Promising Results for Wound Healing
Beyond just killing bacteria, the technology showed significant potential in medical recovery. In laboratory studies involving rats, the research demonstrated that the light-activated treatment could accelerate the healing of infected wounds. By simultaneously reducing the bacterial load and breaking down the protective biofilms, the technology creates an environment conducive to rapid tissue repair.
This advancement marks a significant milestone for IIT (BHU), showcasing the institute's ability to produce interdisciplinary research that addresses pressing global healthcare challenges, particularly the rising tide of antibiotic-resistant bacteria.