A Glow Stick That Detects Cancer

Chemiluminescence, or chemical light, is the principle behind the glow sticks (also known as light sticks) used at rock concerts and as quick tools to grab when the electricity goes out. But they can also be used to diagnose diseases by identifying concentrations of biological samples.

Tel Aviv University researchers devise a novel probe to identify and measure microscopic cell activity

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A new mechanism developed by Tel Aviv University researchers produces a 3,000-times-brighter, water-resistant chemiluminescent probe with particular application to medical and cancer diagnosis.

A Glow Stick That Detects CancerThe research found that tweaking the electronic structure of current probes improves their inherent fluorescence. This could lead to the invention of a new single-component system with multiple applications — including the detection and measurement of cellular activity that points to certain pathologies, such as cancer. The study was recently published in ACS Central Science.

A Glow Stick That-Detects-Cancer-News-Time-Now“Chemiluminescence is considered one of the most sensitive methods used in diagnostic testing,” said Prof. Doron Shabat of TAU’s School of Chemistry, who led the research. “We have developed a method to prepare highly efficient compounds that emit light upon contact with a specific protein or chemical. These compounds can be used as molecular probes to detect cancerous cells, among other applications.”

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Fixing a glitch

The research, conducted in collaboration with Dr. Christoph Bauer of Geneva University, repairs an energy-loss “glitch” in current chemiluminescent probes. Most systems use a mixture of one emitter molecule that detects the species of interest, and another two additional ingredients — a fluorophore and a soap-like substance called a surfactant — that amplify the signal to detectable levels. But energy is lost in the transfer process from the emitter molecule to the fluorophore, and surfactants are not biocompatible.

A Glow Stick That Detects Cancer“As synthetic chemists, we knew how to link structure and function,” said Prof. Shabat. “By adding two key atoms, we created a much brighter probe than those currently on the market. In addition, this particular molecule is suitable for direct use in cells.”

A Glow Stick That Detects CancerBased on this molecule, the researchers developed sensors to detect several biologically relevant chemicals. They also used the chemiluminescent molecule to measure the activity of several enzymes and to image cells by microscopy.

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A Glow Stick That Detects Cancer“This gives us a new powerful methodology with which we can prepare highly efficient chemiluminescence sensors for the detection, imaging and analysis of various cell activities,” said Prof. Shabat. The researchers are currently exploring ways of amplifying the chemiluminescence of the new probes for in vivo imaging.

A Glow Stick That Detects CancerThe research was funded in part by the Israel Science Foundation, the Binational Science Foundation, the German Israeli Foundation, and the Israeli National Nanotechnology Initiative.

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