Abstract
Background
There is no effective therapy for patients with malignant pleural mesothelioma (MPM) who progressed to platinum-based chemotherapy and immunotherapy.
Methods
We aimed to investigate the antitumor activity of CDK4/6 inhibitors using in vitro and in vivo preclinical models of MPM.
Results
Based on publicly available transcriptomic data of MPM, patients with CDK4 or CDK6 overexpression had shorter overall survival. Treatment with abemaciclib or palbociclib at 100 nM significantly decreased cell proliferation in all cell models evaluated. Both CDK4/6 inhibitors significantly induced G1 cell cycle arrest, thereby increasing cell senescence and increased the expression of interferon signalling pathway and tumour antigen presentation process in culture models of MPM. In vivo preclinical studies showed that palbociclib significantly reduced tumour growth and prolonged overall survival using distinct xenograft models of MPM implanted in athymic mice.
Conclusions
Treatment of MPM with CDK4/6 inhibitors decreased cell proliferation, mainly by promoting cell cycle arrest at G1 and by induction of cell senescence. Our preclinical studies provide evidence for evaluating CDK4/6 inhibitors in the clinic for the treatment of MPM.
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Data availability
All data generated or analysed during this study will be stored in EGA and available on reasonable request.
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Acknowledgements
We thank CERCA Programme/Generalitat de Catalunya for their institutional support and grant 2017SGR448.
Funding
EN received support from the SLT006/17/00127 grant, funded by the Department of Health of the Generalitat de Catalunya by the call “Acció instrumental d’intensificació de professionals de la salut”. This study was supported by grants from Instituto de Salud Carlos III (grants PI14/01109 and PI18/00920) (co-funded by European Regional Development Fund. ERDF, a way to build Europe), Spanish Society of Medical Oncology grant for emerging research groups and from Pfizer (WI244174) to EN. MH-M was supported by a Marie Skłodowska-Curie grant, agreement no. 766214.
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Contributions
EA: conceptualisation, methodology, validation, formal analysis, investigation, resources, data curation, writing—original draft, writing—review and editing, visualisation. AA: conceptualisation, software, validation, formal analysis, resources, data curation, writing—review and editing, visualisation. MM-I: methodology, investigation, resources, data curation. MH-M: methodology, validation, investigation, data curation. DC: conceptualisation, software, validation, formal analysis, data curation. MG: conceptualisation, resources, writing—review and editing. EP: resources, writing—review and editing. MS: resources, writing—review and editing. SB: software, validation, data curation. AJS: resources, writing—review and editing. AD: resources, writing—review and editing. RP: resources, data curation, writing—review and editing. SP: resources, writing—review and editing. SA: resources, writing—review and editing. IE: resources, writing—review and editing. RR: resources, writing—review and editing. RL: resources, validation, data curation. AV: resources, validation, data curation. ED: data curation. MV: resources, validation, data curation. MS-C: resources, writing—review and editing. DF: resources, validation, formal analysis, investigation, data curation, writing—review and editing. CM-P: conceptualisation, methodology, validation, formal analysis, investigation, data curation, writing—review and editing, visualisation. AV: conceptualisation, methodology, validation, formal analysis, investigation, data curation, writing—review and editing, visualisation. XS: conceptualisation, software, formal analysis, data curation, writing—review and editing, visualisation. EN: conceptualisation, methodology, validation, formal analysis, investigation, resources, data curation, writing—original draft, writing—review and editing, visualisation, supervision, project administration, funding acquisition.
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Competing interests
EN received research support from Roche, Pfizer, Bristol Myers Squibb and Merck Serono and participated in advisory boards from Bristol Myers Squibb, Merck Serono, Merck Sharpe & Dohme, Lilly, Roche, Pfizer, Takeda, Boehringer Ingelheim, Bayer, Amgen and Astra Zeneca. RP has participated in advisory boards from Bristol Myers Squibb, Merck Sharpe & Dohme, Roche, Pfizer, Lilly, Boehringer Ingelheim and Astra Zeneca. DF has received research support from Astex Therapeutics, Astra Zeneca, Bayer, Boehringer Ingelheim, Bristol Myers Squibb, Clovis Oncology, Merck Sharpe & Dohme, Lilly Oncology, Roche and participated in advisory boards from Atara Therapeutics, Bayer, Boehringer Ingelheim and Inventiva. The other authors declare no competing interests.
Ethics approval and consent to participate
The retrospective cohort was approved by a National Ethical Committee, under the references 4/LO/1527 (a translational research platform entitled Predicting Drug and Radiation Sensitivity in Thoracic Cancers—also approved by University Hospitals of Leicester NHS Trust under the reference IRAS131283) and 14/EM/1159 (retrospective cohort). Pleural effusions samples were obtained after patients signed the informed consent approved by the Hospital de Bellvitge Ethical Committee (PR152/14). All the animal experiments were performed in accordance with protocols approved by Animal Research Ethics Committee at IDIBELL. This study was performed in accordance with the principles outlined in the Declaration of Helsinki.
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Aliagas, E., Alay, A., Martínez-Iniesta, M. et al. Efficacy of CDK4/6 inhibitors in preclinical models of malignant pleural mesothelioma. Br J Cancer 125, 1365–1376 (2021). https://doi.org/10.1038/s41416-021-01547-y
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DOI: https://doi.org/10.1038/s41416-021-01547-y