Iridium (Ir): Metallic complexes and their applications against cancer
DOI:
https://doi.org/10.33448/rsd-v14i8.49342Keywords:
Cancer, Iridium (Ir), Iridium(III), Coordination chemistry, Chemotherapy.Abstract
The quest for new and more effective cancer drugs continues to be one of humanity's greatest challenges. The objective of this article is to present a literature review on iridium (Ir), its metal complexes, and applications against cancer. A narrative review was conducted using the Google Scholar database, and the search terms employed were: cancer; coordination chemistry; chemotherapy; iridium (Ir); iridium(III). The laboratories from different fields, especially those with a more multidisciplinary and interdisciplinary approach, have been striving to produce a good prototype for combating oncological diseases, the clustering of which constitutes one of the leading causes of death worldwide. In this context, new metal complexes with different coordination centers have been synthesized for preliminary testing. Another strategy has been to test metal complexes with known reactivity within a biological context, aiming to combat cancer cells. Regardless of the strategic path of the research projects chosen by the various groups interested in the topic, the fundamental aim is to advantageously replace the famous platinum complexes, starting with the paradigmatic "cisplatin" and its derivatives. One of the candidates that has attracted the most attention is iridium (Ir). Indeed, iridium (Ir) complexes, particularly iridium(III), have been considered interesting for advancing more definitive tests aimed at clinical application against cancer.
References
Starha, P. (2025). Anticancer iridium(III) cyclopentadienyl complexes. Inorganic Chemistry Frontiers. 12, 897.
Lee, J. D. (1994). Química Inorgânica Não Tão Concisa. Quinta edição, 527p.
Krasnov, L., Tatarin, S., Smirnov, D., & Bezzubov, S. (2024). IrCytoToxDB: a dataset of iridium(III) complexes cytotoxicities against various cell lines. Nature - Scientific data. 11, 870 (7p).
Carrasco, A. C., Rodríguez-Fanjul, V., Habtermariam, A., & Pizarro, A. M. (2020). Structurally Strained Half-Sandwich Iridium(III) Complexes As Highly Potent Anticancer Agents. Journal of Medical Chemical. 63(8), 4005-21.
De Palo, A., Draca, D., Murrali, M. G., Zacchini, S., Pampaloni, G., Mijatovic, S., Maksimovic-Ivanic, D. & Marchetti, F. (2021). A comparative Analysis of the In Vitro Anticancer Activity of Iridium(III) {n5-C5Me4R} Complexes with Variable R Groups. International Journal of Molecular Sciences. 22, 7422 (18p).
Li, Y., Tan, C., Zhang, W., He, L., Ji, L., & Mao, Z. (2015). Phosporescent iridium(III)-bis-N-heterocyclic carbene complexes as mitochondria-targeted theranostic and photodynamic anticancer agents. Biomaterials, 39: 95-04.
Lu, L., Liu, L., Chao, W., Zhong, H., Wang, M., Chen, X., Lu, J., Li, R., Ma, D. & Leung, C. (2015). Identification of an iridium(III) complex with anti-bacterial and anti-cancer activity. Nature-Scientific Reports. 5, 14544 (8 páginas).
Masternak, J., Gilewska, A., Barszcz, B., Lakomska, I., Kazimierczuk, K., Sitkowski, J., Wietrzyk, J., Kamecka, A., & Milczarek, M. (2020). Ruthenium(II) and Iridium(III) Complexes as Tested Materials for New Anticancer Agents. Materials. 13, 2491 (22p).
Moreira, L. M. & Lyon, J. P. (2025). Ródio (Rh): complexos metálicos aplicados contra o câncer. Research, Society and Development, 14(4), e0714448600 (8p)e.
Moreira, L. M., & Lyon, J. P. (2025). Platina (Pt): Complexos metálicos e suas aplicações contra o câncer. Research, Society and Development, 14(3), e-4514348475 (9p)a.
Moreira, L. M., & Lyon, J. P. (2025). Rutênio (Ru): Propriedades, compostos de coordenação e aplicações catalíticas e farmacológicas. Research, Society and Development, 14(1), e6114148046b.
Moreira, L. M., & Lyon, J. P. (2025). Paládio (Pd): propriedades, química de coordenação e aplicações contra o câncer. Research, Society and Development, 14(3), e7914348533 (9p)d.
Moreira, L. M., Lyon, J. P., Pereira, C., Silva, R. S., & Schultz, M. S. (2024). Manganês (Mn): Propriedades redox, química de coordenação e implicações biológicas. Research, Society and Development, 13(2), (2024) e13713245186a.
Moreira, L. M., & Lyon, J. P. (2025). Ouro (Au): Complexos metálicos aplicados contra a artrite reumatóide e o câncer. Research, Society and Develpment, 14(4), e5514448721(9p), 2025c.
Moreira, L. M., Lyon, J. P., & Teixeira, A. O. (2023). A relação estrutura-atividade da Vitamina B12 e das cobalaminas e suas correlações nutricionais. Research, Society and Development, 12(11), e05121143658b.
Moreira, L. M., Teixeira, A. O., & Lyon, J. P. (2024). Cobre (Cu): Reatividade, compostos de coordenação e atuação biológica. Research, Society and Development, 13(3), e5313345291b.
Moreira, L. M., Teixeira, A. O., & Lyon, J. P. (2023). A flexibilidade dos anéis macrocíclicos e as diferentes conformações espaciais de macrocíclicos metalados e não-metalados. Research, Society and Development, 12(10), e28121043407a.
Moreira, L. M., Teixeira, A. O., & Lyon, J. P. (2022). Métodos Fototerapêuticos de relevância clínica. Research, Society and Development, 11(5), e51411528589.
Pereira, A. S., Shitsuka, D. M., Parreira, F. J., & Shitsuka, R. (2018). Metodologia da pesquisa científica [free e-book/repositório.ufsm.br]. Ed. UFSM. https://www.ufsm.br/app/uploads/sites/358/2019/02/Metodologia-da-Pesquisa-Científica_final.pdf
Rother, E. T. (2007). Revisão Sistemática X Revisão Narrativa. Acta Paulista de Enfermagem, 20(2), https://doi.org/10.1590/S0103-21002007000200001.
Szymaszek, P., Tyszka-Czochara, M., & Ortyl, J. (2024). Iridium(III) complexes as novel theranostic small molecules for medical diagnostics, precise imaging at a single cell level and targeted anticancer therapy. European Journal of Medicinal Chemistry. 276, 116648.
Tang, B., Wan, D., Wang, Y., Yi, Q., Guo, B., & Liu, Y. (2018). An iridium(III) complex as potent anticancer agente induces apoptosis and autophagy in B16 cells through inhibition of the AKT/mTOR pathway. European Journal of Medicinal Chemistry. 145, 302-14.
Ma, D., Wu, C., Wu, K., & Leung, C. (2019). Iridium(III) Complexes Targeting Apoptotic Cell Death in Cancer Cells. Molecules, 24, 2739.
Ortega-Forte, E., Hernández-Garcia, S., Vigueras, G., Henarejos-Escudero, P., Cutillas, N., & Ruiz, J. & Gandía-Herrero, F. (2022). Cellular and Molecular Life Sciences. 79, 510 (16p).
Ramos, R., Karaiskou, A., Botuha, C., Trichet, M., Dingli, F., Forté, J., Lam, F., Canette, A., Chaumeton, C., Salome, M., Cheneul, T., Bergonzi, C., Meyer, P., Bohic, S., Loew, D., Salmain, M., & Sobczak-Thépot, J. (2023). Identification of the intracellular protein targets of a bio-active clickable half-sandwich iridium complex by chemical proetomics. BioRxiv – The Preprinter Server for Biology. Doi: https://doi.org/10.1101/2023.05.24.542041 (36p).
Zheng, Y., He, L., Zhang, D., Tan, D., Ji, L. & Mao, Z. (2017). Mixed-ligand iridium(III) complexes as photodynamic anticancer agents. Dalton Transactions. 34.
Wu, Y., Liu, J., Shao, M., Zhang, P., Song, S., Yang, G., Liu, X., & Liu, Z. (2022). Cyclometalated Iridium(III) Dithioformi Acid Complexes as Mitochondria-Targeted Imaging and Anticancer Agents. SSSR.
Yang, T., Zhu, M., Jiang, M., Yang, F., & Zhang, Z. (2022). Current status of iridium-based complexes against lung cancer. Frontiers in Pharmacology. 13, 1025544.
Wang, Y., Li, Y., Chen, J., Liu, H., Zhou, Y., Huang, C., Liang, L., Liu, Y., & Wang, Z. (2023). Anticancer effect evaluation of iridium(III) complexes targeting mitochondira and endoplasmic reticulum. Journal of Inorganic Biochemistry. 238, 112054.
Zhang, W., Banerjee, S., Imberti, C., Clarkson, G. J., Wang, Q., Zhong, Q., Young, L. S., Romero-Canelón, I., Zeng, M., Habtemariam, A., & Sadler, P. J. (2019). Strategies for conjugating iridium(III) anticancer complexes to targeting peptides via copper-free click chemistry. Inorganica Chimica Acta, 503: doi:10.1016/j.ica.2019.119396.
Downloads
Published
Issue
Section
License
Copyright (c) 2025 Leonardo Marmo Moreira, Juliana Pereira Lyon

This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with this journal agree to the following terms:
1) Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
2) Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
3) Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.
