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Biotinylated photoactive Pt(iv) anticancer complexes.

Huayun Shi¹, Cinzia Imberti, Huaiyi Huang

¹Department of Chemistry, University of Warwick, Coventry, CV4 7AL, UK. p.j.sadler@warwick.ac.uk.

Chemical Communications (Cambridge, England)

|January 29, 2020

Summary

This summary is machine-generated.

New platinum(IV) complexes with biotin show potent light-activated cancer cell killing. Binding to avidin significantly boosted their effectiveness and cellular uptake in ovarian cancer cells.

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Area of Science:

Medicinal Chemistry
Photodynamic Therapy
Nanotechnology

Background:

Platinum(IV) complexes offer advantages over platinum(II) drugs, including improved stability and reduced side effects.
Biotinylation can enhance drug targeting and cellular uptake.
Visible light-activated chemotherapy (photochemotherapy) offers spatiotemporal control over drug release and activation.

Purpose of the Study:

To synthesize and characterize novel biotinylated diazido-platinum(IV) complexes.
To evaluate the photocytotoxicity and cellular accumulation of these complexes, particularly when conjugated with avidin.
To investigate the potential of these complexes as visible light-activated anticancer agents for ovarian cancer.

Main Methods:

Synthesis and characterization of biotinylated diazido-platinum(IV) complexes.
In vitro photocytotoxicity assays using human ovarian cancer cells.
Cellular uptake studies using fluorescence microscopy.
Assessment of cellular morphology changes upon light irradiation.

Main Results:

Novel biotinylated diazido-Pt(IV) complexes demonstrated significant photocytotoxicity under visible light irradiation.
The complex all-trans-[Pt(py)2(N3)2(biotin)(OH)] (2a) showed enhanced photocytotoxicity and cellular accumulation when conjugated with avidin.
Irradiation of cancer cells treated with the avidin-conjugated complex induced substantial morphological alterations, indicating effective cell death induction.

Conclusions:

Biotinylated diazido-Pt(IV) complexes are promising candidates for visible light-activated cancer therapy.
Avidin conjugation significantly enhances the therapeutic efficacy of these platinum complexes.
These findings support the development of targeted photochemotherapy strategies for ovarian cancer treatment.