The senescent side of tumor suppression
Related Experiment Video
Updated: Aug 14, 2026
Simultaneous Imaging and Flow-Cytometry-based Detection of Multiple Fluorescent Senescence Markers in Therapy-Induced Senescent Cancer Cells
Published on: July 12, 2022
Manuel Collado1, Manuel Serrano
1Molecular Oncology Program, Spanish National Cancer Centre (CNIO), Madrid, Spain.
Abstract:
Neoplastic transformation of human cells is a rare event that requires overcoming anti-tumoral cellular responses. Oncogene-induced senescence (OIS) is considered a crucial tumor suppressor mechanism controlling unchecked proliferation driven by oncogenic mutation. However, the analysis of OIS has been restricted so far to cultured cells. Recently, we have identified novel molecular markers of OIS and we have demonstrated the occurrence of senescence using mouse models of oncogenic activation. Importantly, we have found that senescent cells are abundant in premalignant lesions of the skin, the lung, and the pancreas. In contrast, senescent cells were rare in the malignant lesions developed by these same animals. These observations, together with similar ones by other investigators, strongly argue for the occurrence of OIS in vivo and for its active role in restricting tumor development. These results open the possibility of using senescence markers as diagnostic and prognostic tools, and prompt the investigation on the potential therapeutical use of senescence-inducing drugs.
Insights
Oncogene-induced senescence (OIS) acts as a tumor suppressor by halting cancer cell growth. This study identifies OIS markers and shows senescence prevents tumor development in vivo.
Area of Science:
- Cellular biology
- Oncology
- Cancer research
Background:
- Neoplastic transformation is rare, requiring cells to overcome anti-tumoral responses.
- Oncogene-induced senescence (OIS) is a key tumor suppressor mechanism against uncontrolled proliferation.
- Previous OIS analysis was limited to cultured cells.
Purpose of the Study:
- To identify novel molecular markers for OIS.
- To demonstrate the occurrence of OIS in vivo.
- To investigate the role of OIS in tumor suppression.
Main Methods:
- Identification of novel molecular markers for OIS.
- Utilizing mouse models of oncogenic activation.
- Analysis of senescence in premalignant and malignant lesions.
Main Results:
- Senescent cells were abundant in premalignant lesions (skin, lung, pancreas) in mouse models.
- Senescent cells were rare in malignant lesions from the same animals.
- OIS occurs in vivo and actively restricts tumor development.
Conclusions:
- OIS plays a significant role in preventing tumor progression in vivo.
- Senescence markers show potential as diagnostic and prognostic tools.
- Senescence-inducing drugs may offer therapeutic benefits in cancer treatment.
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