RNA is a pro-apoptotic target of cisplatin in cancer cell lines and C. elegans
Cisplatin not only targets DNA but also RNA. However, it is largely unknown whether platinated RNA (Pt-RNA) causes apoptosis and thus contributes to the cytotoxic effects of cisplatin. Consequently, cellular RNA was isolated from HepG2 and LS180 cells, exposed to cisplatin, and the resulting Pt-RNA...
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| Main Authors: | , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
18 March 2024
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| In: |
Biomedicine & pharmacotherapy
Year: 2024, Volume: 173, Pages: 116450-1-116450-10 |
| ISSN: | 1950-6007 |
| DOI: | 10.1016/j.biopha.2024.116450 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.biopha.2024.116450 Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0753332224003342 
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| Author Notes: | Fabian Rose, Beate Köberle, Sebastian Honnen, Cindy Bay, Jürgen Burhenne, Johanna Weiss, Walter E. Haefeli, Dirk Theile |
| Summary: | Cisplatin not only targets DNA but also RNA. However, it is largely unknown whether platinated RNA (Pt-RNA) causes apoptosis and thus contributes to the cytotoxic effects of cisplatin. Consequently, cellular RNA was isolated from HepG2 and LS180 cells, exposed to cisplatin, and the resulting Pt-RNA (20ng Pt/µg RNA) was transfected into these cancer cell lines or used to treat an apoptosis reporter Caenorhabditis elegans (C. elegans) strain (MD701, expressing CED-1::GFP). Cellular and molecular effects of Pt-RNA were evaluated by luminogenic caspase 3/7 assays, PCR array analysis, and fluorescence microscopy-based quantification of apoptosis in C. elegans gonads. Assuming RNA cross-linking (pseudo double-stranded RNA), the contribution of the Toll-like receptor 3 (TLR3, a sensor of double-stranded RNA) to apoptosis induction in cancer cell lines was investigated by pharmacological TLR3 inhibition and overexpression. In contrast to controls, Pt-RNA significantly enhanced apoptosis in C. elegans (2-fold) and in the cancer cell lines (2-fold to 4-fold). TLR3 overexpression significantly enhanced the pro-apoptotic effects of Pt-RNA in HepG2 cells. TLR3 inhibition reduced the pro-apoptotic effects of Pt-RNA and cisplatin, but not of paclitaxel (off-target control). Gene expression analysis showed that Pt-RNA (but not RNA) significantly enhanced the mRNA levels of nuclear factor kappa B subunit 2 and interleukin-8 in HepG2 cells, suggesting that Pt-RNA is a damage-associated molecular pattern that additionally causes pro-inflammatory responses. Together, this data suggests that not only DNA but also cellular RNA is a functionally relevant target of cisplatin, leading to pro-apoptotic and immunogenic effects. |
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| Item Description: | Gesehen am 14.11.2024 |
| Physical Description: | Online Resource |
| ISSN: | 1950-6007 |
| DOI: | 10.1016/j.biopha.2024.116450 |