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Updated: Oct 23, 2025

Development and Maintenance of a Preclinical Patient Derived Tumor Xenograft Model for the Investigation of Novel Anti-Cancer Therapies
Published on: September 30, 2016
Clinical, genetic and pharmacological data support targeting the MEK5/ERK5 module in lung cancer
Adrián Sánchez-Fdez1,2,3, María Florencia Re-Louhau1,2, Pablo Rodríguez-Núñez1,2
1Institute of Molecular and Cellular Biology of Cancer (IBMCC)-CSIC, Salamanca, Spain.
Abstract:
Despite advances in its treatment, lung cancer still represents the most common and lethal tumor. Because of that, efforts to decipher the pathophysiological actors that may promote lung tumor generation/progression are being made, with the final aim of establishing new therapeutic options. Using a transgenic mouse model, we formerly demonstrated that the sole activation of the MEK5/ERK5 MAPK route had a pathophysiological role in the onset of lung adenocarcinomas. Given the prevalence of that disease and its frequent dismal prognosis, our findings opened the possibility of targeting the MEK5/ERK5 route with therapeutic purposes. Here we have explored such possibility. We found that increased levels of MEK5/ERK5 correlated with poor patient prognosis in lung cancer. Moreover, using genetic as well as pharmacological tools, we show that targeting the MEK5/ERK5 route is therapeutically effective in lung cancer. Not only genetic disruption of ERK5 by CRISPR/Cas9 caused a relevant inhibition of tumor growth in vitro and in vivo; such ERK5 deficit augmented the antitumoral effect of agents normally used in the lung cancer clinic. The clinical correlation studies together with the pharmacological and genetic results establish the basis for considering the targeting of the MEK5/ERK5 route in the therapy for lung cancer.
Insights
Targeting the MEK5/ERK5 pathway shows therapeutic promise for lung cancer. Inhibiting ERK5 slows tumor growth and enhances existing treatments, offering new hope for patients.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Genetics
Background:
- Lung cancer remains a leading cause of cancer-related death globally.
- Understanding the molecular drivers of lung adenocarcinoma is crucial for developing novel therapies.
- Previous research identified the MEK5/ERK5 mitogen-activated protein kinase (MAPK) pathway's role in lung tumor development.
Purpose of the Study:
- To investigate the therapeutic potential of targeting the MEK5/ERK5 pathway in lung cancer.
- To correlate MEK5/ERK5 levels with patient prognosis.
- To evaluate the efficacy of genetic and pharmacological inhibition of MEK5/ERK5.
Main Methods:
- Analysis of MEK5/ERK5 expression levels in lung cancer patient samples.
- In vitro and in vivo studies using CRISPR/Cas9 to disrupt ERK5.
- Pharmacological inhibition of the MEK5/ERK5 pathway.
- Assessment of tumor growth inhibition and combination therapy effects.
Main Results:
- Elevated MEK5/ERK5 levels are associated with a poorer prognosis in lung cancer patients.
- Genetic disruption of ERK5 significantly inhibited lung cancer cell growth in vitro and in vivo.
- Pharmacological targeting of the MEK5/ERK5 pathway demonstrated therapeutic efficacy.
- ERK5 inhibition enhanced the anti-tumor effects of standard lung cancer treatments.
Conclusions:
- The MEK5/ERK5 pathway is a viable therapeutic target for lung cancer.
- Targeting MEK5/ERK5 offers a promising strategy to improve lung cancer treatment outcomes.
- Combined approaches involving MEK5/ERK5 inhibition may overcome treatment resistance.
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