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Reversing radiation-induced immunosuppression using a new therapeutic modality
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Abstract
Radiation-induced immune suppression poses significant health challenges for millions of patients undergoing cancer chemotherapy and radiotherapy treatment, and astronauts and space tourists travelling to outer space. While a limited number of recombinant protein therapies, such a Sargramostim, are approved for accelerating hematologic recovery, the pronounced role of granulocyte-macrophage colony-stimulating factor (GM-CSF or CSF2) as a proinflammatory cytokine poses additional challenges in creating immune dysfunction towards pathogenic autoimmune diseases. Here we present an approach to high-throughput drug-discovery, target validation, and lead molecule identification using nucleic acid-based molecules. These Nanoligomer™ molecules are rationally designed using a bioinformatics and an artificial intelligence (AI)-based ranking method and synthesized as a single-modality combining 6-different design elements to up- or downregulate gene expression of target gene, resulting in elevated or diminished protein expression of intended target. This method additionally alters related gene network targets ultimately resulting in pathway modulation. This approach was used to perturb and identify the most effective upstream regulators and canonical pathways for therapeutic intervention to reverse radiation-induced immunosuppression. The lead Nanoligomer™ identified in a screen of human donor derived peripheral blood mononuclear cells (PBMCs) upregulated Erythropoietin (EPO) and showed the greatest reversal of radiation induced cytokine changes. It was further tested in vivo in a mouse radiation-model with low-dose (3 mg/kg) intraperitoneal administration and was shown to regulate gene expression of epo in lung tissue as well as counter immune suppression. These results point to the broader applicability of our approach towards drug-discovery, and potential for further investigation of our lead molecule as reversible gene therapy to treat adverse health outcomes induced by radiation exposure.
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A lead Nanoligomer compound up-regulates erythropoietin expression and reverses radiation-induced cytokine expression changes in human peripheral blood mononuclear cells.
“A lead compound, identified in a screen of human peripheral blood mononuclear cells, up-regulates erythropoietin expression and reverses radiation-induced cytokine expression changes.”
From Breaking the limit: Biological countermeasures for space radiation exposure to enable long-duration spaceflight (2022) · cites this paper as Courtney et al., 2022
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Cited by
Sorted by citations
Dynan, W. S., Chang, P. Y., Sishc, B. J., & Elgart, S. R. (2022) · Life Sciences in Space Research · doi:10.1016/j.lssr.2022.10.003 · Cited by 12
Metadata
- Authors
- Courtney, C. M., Sharma, S., Fallgren, C., Weil, M. M., Chatterjee, A., & Nagpal, P.
- Affiliations
- BioWorks (United States) (US)
- Colorado State University (US)
- Corresponding author
- Nagpal, Prashant
- Venue
- Life Sciences in Space Research
- Publisher
- Elsevier BV
- Published
- 2022-11
- Volume
- 35
- Pages
- 127-139
- ISSN
- 2214-5524 (ISSN-L)
- OpenAlex
- W4280521825
- Cited by
- 16
- References
- 3
- Citations by year
- 2024: 10 · 2023: 1 · 2022: 5
- FWCI
- 2.29
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Life Sciences in Space Research (publishedVersion, cc-by-nc-nd)
- bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
- PubMed (publishedVersion)
- Funders
- National Aeronautics and Space Administration (80NSSC21C0242, NNX15AK13G)
- Topics
- Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Effects of Radiation Exposure
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
- Life Sciences › Immunology and Microbiology › Immunology › Immunotoxicology and immune responses
- Keywords
- radiation-induced immunosuppression, nucleic acid therapeutics, GM-CSF, erythropoietin, gene expression modulation, peripheral blood mononuclear cells, gene therapy, space radiation, astronaut health
- MeSH terms
- Animals, Artificial Intelligence, Humans, Immunosuppression Therapy, Leukocytes, Mononuclear, Recombinant Proteins, Granulocyte Colony-Stimulating Factor, Cytokines, Mice
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