# Characterisation and in vitro cytotoxicity of triorganophosphinegold(i) 2-mercaptobenzoate complexes.
> トリオルガノホスフィン金(I)2-メルカプトベンゾエート錯体の合成・構造解析およびin vitro細胞毒性評価


## Abstract

Three [R₃PAu(2mba)] complexes (R = Et, Ph, Cy; 2mba = 2-mercaptobenzoate anion) were synthesized and fully characterized by ¹H, ¹³C, and ³¹P NMR spectroscopy. Solvent-dependent variation in ¹H spectra was attributed to competition between intramolecular and intermolecular hydrogen bonding. X-ray crystallographic analysis of the phenyl derivative revealed a linear P-Au-S coordination geometry and lattice association through a carboxylic acid dimer motif. Cytotoxicity was assessed against seven human tumor cell lines, with the complexes exhibiting moderate to very high activity. Notably, activity against the H226 non-small cell lung cancer line exceeded that of several established cytotoxic agents.

### Mechanism

The gold(I) complexes adopt a linear P-Au-S coordination geometry and display cytotoxicity against human tumor lines; the precise molecular mechanism of cell killing was not elucidated in this study.

## Bibliographic

- **Authors**: de Vos D, Clements P, Pyke SM, Smyth DR, Tiekink ER
- **Journal**: Met Based Drugs
- **Year**: 1999
- **PMID**: [18475878](https://pubmed.ncbi.nlm.nih.gov/18475878/)
- **DOI**: [10.1155/MBD.1999.31](https://doi.org/10.1155/MBD.1999.31)
- **PMC**: [PMC2365151](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2365151/)
- **Study type**: in vitro study
- **Delivery route**: in vitro
- **Effect reported**: positive

## Delivery context

This is basic research at the cellular or molecular level. For human application, inhalation is the most promising delivery route, but inhalation carries explosion risk and concentration matters (empirical LFL of 10%; high-concentration devices are not recommended).

## Safety notes

This is basic research at the cellular or molecular level. For human application, inhalation is the most promising delivery route, but inhalation carries explosion risk and concentration matters (empirical LFL of 10%; high-concentration devices are not recommended).

See also:
- [Inhalation concentration and LFL / UFL](https://h2-papers.org/en/safety-notes/inhalation-concentration)
- [Consumer Affairs Agency accident cases](https://h2-papers.org/en/safety-notes/accident-cases)
- [Inhalation safety threshold lineage](https://h2-papers.org/en/safety-notes/lineage)

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> **Cite as**: H2 Papers — PMID 18475878. https://h2-papers.org/en/papers/18475878
> **Source**: PubMed PMID [18475878](https://pubmed.ncbi.nlm.nih.gov/18475878/)