A promising new molecule against antibiotic-resistant bacteria

Antibiotic-resistant bacteria, such as methicillin-resistant Staphylococcus aureus or multidrug-resistant tuberculosis bacillus, pose a major challenge to modern medicine. Researchers have developed a family of chemical compounds combining two structures known for their antibacterial properties: tetrazole and thiourea. These hybrid molecules could provide an effective solution against difficult-to-treat infections.

Among these compounds, one stands out in particular. It features a trifluoromethyl group and shows remarkable activity against several strains of staphylococci, including those resistant to many antibiotics. Its efficacy is comparable to that of ciprofloxacin, a commonly used antibiotic. Furthermore, it also acts against tuberculosis, including multidrug-resistant and extensively drug-resistant forms, with a very low minimum inhibitory concentration.

Scientists have studied how this molecule interacts with two essential bacterial proteins: dihydrofolate reductase, involved in DNA synthesis, and a protein linked to bacterial cell wall formation. Computer simulations suggest it could block both targets simultaneously, which would explain its broad spectrum of action. This dual approach also reduces the risk of bacteria developing resistance.

Laboratory tests confirm that this compound is active at very low doses, without showing toxicity to healthy human cells. It also has favorable physicochemical properties for future use as a drug, such as a good ability to cross cell membranes.

These results pave the way for new treatments against resistant infections. The identified molecule could serve as a basis for developing more potent and better-tolerated antibiotics, capable of bypassing current resistance mechanisms. The next steps will involve refining its structure to optimize its efficacy and safety before clinical trials.

Legal Attributions

Study Citation

DOI: https://doi.org/10.1007/s43440-026-00848-4

Title: Discovery of a tetrazole-thiourea derivative as a potential active agent against multidrug-resistant Staphylococcus aureus and Mycobacterium tuberculosis

Journal: Pharmacological Reports

Publisher: Springer Science and Business Media LLC

Authors: Jolanta Szymańska-Majchrzak; Agnieszka Głogowska; Ewa Augustynowicz-Kopeć; Katarzyna Ewa Greber; Krzesimir Ciura; Wioletta Olejarz; Tomasz Szostek; Marta Struga; Daniel Szulczyk