MOSCOW, September 30, 2025: Russian scientists have developed a newly synthesized compound that combines cancer-inhibiting properties with fluorescence, a development that may improve both the detection and study of tumor cells. The compound, named 2-(3-(fluorosulfato)phenyl)benzoxazole, was created through a collaboration between Tomsk Polytechnic University, Siberian State Medical University, and the A.V. Nikolaev Institute of Inorganic Chemistry. The compound demonstrated significant cytostatic activity during laboratory testing against human cancer cell lines, specifically prostate adenocarcinoma (PC-3) and breast adenocarcinoma (MCF-7 and BT-474).
Cytostatic agents are characterized by their ability to stop cancer cells from dividing and proliferating, offering a mechanism to limit tumor growth without inducing immediate cell death. According to the researchers, the compound contains a benzoxazole core, a structure already known for its diverse biological properties including antimicrobial and anticancer activity. The new molecule integrates a fluorosulfate group that gives it fluorescent capabilities, allowing it to emit visible light under specific laboratory conditions. This fluorescence allows the compound to be tracked in real time during cellular interactions.
In the study, the compound’s effects on healthy cells were also evaluated. Normal human fibroblasts showed greater resistance to the compound compared to the cancer cell lines. While the compound was generally cytostatic at lower concentrations, it displayed cytotoxic properties causing direct cell death at higher concentrations and extended exposure periods in select breast cancer lines. These findings suggest a differential biological response that could be relevant for future pharmaceutical profiling. The fluorescence properties of the compound were confirmed through photophysical analysis.
Researchers test compound on prostate and breast cancer lines
The compound exhibited emission in the visible spectrum, with the highest fluorescence quantum yield measured at 64 percent in an acetonitrile medium. It was also found to retain luminescent properties in solid form, indicating stability in both solution and crystalline states. Researchers employed sulfur (VI) fluoride exchange (SuFEx) chemistry to produce the compound. This synthetic method involved a two-chamber reactor and specific reagent conditions, including the use of formic acid as a solvent, to optimize the chemical yield and stability of the final product.
The compound’s structure was validated using X-ray crystallography, which confirmed its planar aromatic system and documented intermolecular interactions responsible for its solid-state organization. While laboratory findings confirm the compound’s dual functionality, the scientists noted that the observed effects were achieved at relatively high concentrations, ranging from 50 to 200 micromolar. The compound’s impact on tumor cell lines was found to be reversible in many cases, aligning with typical characteristics of cytostatic compounds.
Russian ministry oversees collaborative scientific development
The research was conducted under the oversight of the Ministry of Science and Higher Education of the Russian Federation. Officials described the discovery as a notable advancement in the development of biologically active materials that serve dual roles in diagnostics and therapeutic research. Further investigations are expected to continue under controlled laboratory conditions to expand the understanding of the compound’s full biological profile, including its mechanism of action and compatibility with other research applications in cellular biology. All testing was carried out in vitro and no human or animal trials have been conducted to date. – By EuroWire News Desk.