2024 · Haribabu — Multifaceted exploration of acylthiourea compounds: In vitro cytotoxicity, DFT calculations, molecular docking and dynamics simulation studies.
Super-Abstract
Two newly synthesized acylthiourea compounds were characterized and tested for cytotoxicity against cancer cells, with molecular docking suggesting potential binding to viral proteases. The study uses computational methods alongside laboratory synthesis — molecular hydrogen (H₂) appears only as a structural element in intermolecular hydrogen bonds, not as a therapeutic agent. (International Journal of Biological Macromolecules, 2024.)
Commentary
This paper sits at the boundary of medicinal chemistry and computational biology. The compounds studied — acylthiourea derivatives with a cyclohexyl group — were synthesized and analyzed by spectroscopic methods. Their crystal structure revealed intra- and intermolecular hydrogen bonds (structural H-bonding, not dissolved molecular H₂ therapy). DFT calculations assessed chemical reactivity. Cytotoxicity assays and in silico docking with SARS-CoV-2 protease, human ACE2, and influenza hemagglutinin were performed. The relevance to molecular H₂ therapy is marginal — the term „hydrogen“ here refers to ordinary hydrogen bonds in chemistry, not to dissolved H₂ gas with antioxidant properties. This study is included in the database for completeness as an in-vitro study tagged with respiratory indication, but should not be read as evidence for H₂ gas therapy.
Key quotes
- „The crystal structure of 2 was solved, revealing intra- and inter-molecular hydrogen bonds.“ — hydrogen here refers to structural hydrogen bonding in chemistry, not therapeutic H₂ gas
- „Cytotoxicity assays showed the cyclohexyl group enhanced the activity of compound 2 compared to compound 1.“ — the key structure-activity finding in cell-culture cytotoxicity testing
- „in silico docking with SARS-CoV-2 main protease, human ACE2, and avian influenza H5N1 hemagglutinin indicated strong binding potential of the compounds.“ — computational finding — not yet experimentally confirmed in live viral systems
Our assessment
This is an in-vitro and computational study on newly synthesized chemical compounds — it is not a study on molecular hydrogen (H₂) therapy. The term „hydrogen“ in this paper refers to hydrogen bonds in structural chemistry. No dissolved H₂ gas, H₂-rich water, or H₂ inhalation is studied. Inclusion in the H₂ database appears to be a classification edge case. The cytotoxicity and docking data are preliminary and in silico; no animal or human data are presented. Results should not be cited as evidence for H₂ therapy.
Study design
- Type: in-vitro cytotoxicity + computational chemistry study · Model: cell lines + in silico molecular docking · H₂ relevance: structural hydrogen bonds only — no H₂ gas therapy
- Result: compound 2 (cyclohexyl) showed enhanced cytotoxicity vs. compound 1; in silico strong binding to SARS-CoV-2 protease, ACE2, H5N1 hemagglutinin — all computational predictions, no in-vivo data
Abstract
This study reports the synthesis and analysis of biologically active acylthiourea compounds (1 and 2) with a cyclohexyl moiety. The compounds were characterized using UV-Visible, FT-IR, 1H/13C NMR, and elemental analysis. The crystal structure of 2 was solved, revealing intra- and inter-molecular hydrogen bonds. Density functional theory (DFT) calculations provided insights into chemical reactivity and non-covalent interactions. Cytotoxicity assays showed the cyclohexyl group enhanced the activity of compound 2 compared to compound 1. Epoxide hydrolase 1 was predicted as the enzyme target for both compounds. We modeled the structure of epoxide hydrolase 1 and performed molecular dynamics simulation and docking studies. Additionally, in silico docking with SARS-CoV-2 main protease, human ACE2, and avian influenza H5N1 hemagglutinin indicated strong binding potential of the compounds. This integrated approach improves our understanding of the biological potential of acylthiourea derivatives.
Source & links
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