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Cancer cell-specific cGAS/STING Signaling pathway in the era of advancing cancer cell biology
Vijay Kumar1, Caitlin Bauer1, John H Stewart2
1Department of Interdisciplinary Oncology, Stanley S. Scott Cancer Center, School of Medicine, Louisiana State University Health Science Center (LSUHSC), 1700 Tulane Avenue, New Orleans, LA 70012, USA.
Abstract:
Pattern-recognition receptors (PRRs) are critical to recognizing endogenous and exogenous threats to mount a protective proinflammatory innate immune response. PRRs may be located on the outer cell membrane, cytosol, and nucleus. The cGAS/STING signaling pathway is a cytosolic PRR system. Notably, cGAS is also present in the nucleus. The cGAS-mediated recognition of cytosolic dsDNA and its cleavage into cGAMP activates STING. Furthermore, STING activation through its downstream signaling triggers different interferon-stimulating genes (ISGs), initiating the release of type 1 interferons (IFNs) and NF-κB-mediated release of proinflammatory cytokines and molecules. Activating cGAS/STING generates type 1 IFN, which may prevent cellular transformation and cancer development, growth, and metastasis. The current article delineates the impact of the cancer cell-specific cGAS/STING signaling pathway alteration in tumors and its impact on tumor growth and metastasis. This article further discusses different approaches to specifically target cGAS/STING signaling in cancer cells to inhibit tumor growth and metastasis in conjunction with existing anticancer therapies.
Insights
The cGAS/STING pathway, a key innate immune sensor, plays a crucial role in cancer development and metastasis. Targeting this pathway offers a promising strategy to inhibit tumor growth and spread.
Area of Science:
- Immunology
- Oncology
- Molecular Biology
Background:
- Pattern-recognition receptors (PRRs) are essential for innate immunity, detecting threats via cell membrane, cytosolic, or nuclear localization.
- The cyclic GMP-AMP synthase (cGAS)/stimulator of interferon genes (STING) pathway is a cytosolic PRR system crucial for innate immune responses.
- cGAS/STING activation generates type 1 interferons (IFNs) and proinflammatory cytokines, potentially preventing cancer development, growth, and metastasis.
Purpose of the Study:
- To delineate the impact of cancer cell-specific cGAS/STING signaling pathway alterations on tumor progression.
- To explore therapeutic strategies targeting the cGAS/STING pathway in cancer cells for enhanced treatment outcomes.
Main Methods:
- Review of existing literature on PRRs, cGAS/STING pathway, and cancer immunology.
- Analysis of the role of cGAS/STING in tumor growth, development, and metastasis.
- Discussion of potential therapeutic interventions targeting the cGAS/STING pathway in oncology.
Main Results:
- Alterations in the cGAS/STING pathway within cancer cells significantly influence tumor growth and metastatic potential.
- Activation of cGAS/STING signaling can lead to type 1 IFN production, which may inhibit cancer progression.
- The cGAS/STING pathway presents a potential target for novel cancer therapies.
Conclusions:
- The cGAS/STING pathway is a critical regulator in cancer immunity and progression.
- Targeting cancer cell-specific cGAS/STING signaling offers a promising avenue for novel anticancer therapies.
- Combination strategies involving cGAS/STING pathway modulation and existing treatments may improve cancer management.
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