Measuring the impact of therapy-induced senescence on NK cell phenotypes in cancer
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Updated: Jun 8, 2025
Simultaneous Imaging and Flow-Cytometry-based Detection of Multiple Fluorescent Senescence Markers in Therapy-Induced Senescent Cancer Cells
Published on: July 12, 2022
Shreya R Chowdhury1, Katherine C Murphy1, Chaitanya N Parikh1
1Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA, United States.
Abstract:
Cellular senescence is a damage-induced condition characterized by enduring cell cycle arrest and a heightened secretory profile known as the senescence-associated secretory phenotype (SASP). The SASP consists not only of release of inflammatory cytokines and chemokines that attract and activate a diverse repertoire of innate and adaptive immune cells, but also the upregulation of immunomodulatory cell surface molecules that promote immune clearance of senescent cells. Natural Killer (NK) cells are particularly adept at sensing and eliminating senescent cells. In the setting of cancer, commonly administered cytotoxic and cytostatic therapies can elicit senescence and in turn reactivate NK cell immune surveillance against tumors. Here, we detail a series of in vivo, ex vivo, and in vitro assays to assess the impact of therapy-induced senescence on NK cell phenotypes, including their activation, exhaustion, migration, and killing capacity in the context of pancreatic cancer. Importantly, this methodology can be adapted to investigate NK cell biology across various disease states and treatment modalities and help inform NK cell-based immunotherapies for cancer.
Insights
Therapy-induced cellular senescence enhances Natural Killer (NK) cell activity against pancreatic cancer. This study details methods to assess NK cell function, aiding in developing NK cell-based immunotherapies.
Area of Science:
- Immunology
- Cell Biology
- Oncology
Background:
- Cellular senescence is a state of irreversible cell cycle arrest.
- The senescence-associated secretory phenotype (SASP) involves immune cell recruitment and modulation.
- Natural Killer (NK) cells are crucial for identifying and eliminating senescent cells.
Purpose of the Study:
- To investigate how therapy-induced senescence affects NK cell phenotypes in pancreatic cancer.
- To establish assays for assessing NK cell activation, exhaustion, migration, and killing capacity.
- To provide a framework for studying NK cell responses in various diseases and treatments.
Main Methods:
- In vivo, ex vivo, and in vitro assays were employed.
- NK cell phenotypes, including activation and exhaustion, were analyzed.
- NK cell migration and killing capacity were assessed in the context of pancreatic cancer.
Main Results:
- Therapy-induced senescence was shown to impact NK cell phenotypes.
- The assays provide a comprehensive assessment of NK cell function in response to senescence.
- Methodology is adaptable for diverse disease and treatment contexts.
Conclusions:
- Assessing therapy-induced senescence on NK cells is vital for understanding anti-tumor immunity.
- The described methodologies can inform the development of NK cell-based cancer immunotherapies.
- This work supports the potential of NK cells in pancreatic cancer treatment.
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