Targeting canine mammary tumours via gold nanoparticles functionalized with promising Co(II) and Zn(II) compounds

Luis R. Raposo, Catarina Roma-Rodrigues, Joao Jesus, L. M D R S Martins, Armando J. L. Pombeiro, P. V. Baptista, A. R. Fernandes

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Background: Despite continuous efforts, the treatment of canine cancer has still to deliver effective strategies. For example, traditional chemotherapy with doxorubicin and/or docetaxel does not significantly increase survival in dogs with canine mammary tumors (CMTs). Aims: Evaluate the efficiency of two metal compounds [Zn(DION)2]Cl (TS262, DION = 1,10-phenanthroline-5,6-dione) and [CoCl(H2O)(DION)2][BF4] (TS265) and novel nanovectorizations designed to improve the anti-cancer efficacy of these compounds in a new CMT derived cell line (FR37-CMT). Materials and methods: FR37-CMT cells were exposed to different concentrations of TS262 and TS265 and two new nanoparticle systems and cellular viability was determined. These nanosystems are composed of polyethylene-glycol, bovine-serum-albumin and TS262 or TS265 (NanoTS262 or NanoTS265, respectively). Results: In FR37-CMT, TS262 and TS265 displayed IC50 values well below those displayed by doxorubicin and cisplatin. The nanovectorizations further decreased the IC50 values. Discussion: TS262 and TS265 proved to be effective against FR37-CMT cells and more effective than of doxorubicin and cisplatin. The Nanosystems efficiently delivered the cytotoxic cargo inducing a significant reduction of cell viability in FR37-CMT cell line when compared to the free compounds. Conclusions: TS262 and TS265 are compounds with potential in the treatment of CMTs. NanoTS262 and NanoTS265 demonstrate that such simple nanovectorization via gold nanoparticles shows tremendous potential as anti-cancer formulations, which may easily be expanded to suit other cargo.

Original languageEnglish
Pages (from-to)1537-1542
JournalVeterinary and Comparative Oncology
Issue number4
Publication statusPublished - Dec 2017


  • FR37-CMT
  • 1,10-phenanthroline-5,6-dione metal compounds
  • Canine mammary tumours
  • Cisplatin
  • Doxorubicin
  • Gold nanoparticles
  • Nanotechnology


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