| MyD88 provides a protective role in long-term radiation-induced lung injury. | |
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MedLine Citation:
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PMID: 22248128 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Abstract Purpose: The role of innate immune regulators is investigated in injury sustained from irradiation as in the clinic for cancer treatment or from a nuclear incident. The protective benefits of flagellin signaling through Toll-like receptors (TLR) in an irradiation setting warrant study of a key intracellular adaptor of TLR signaling, namely Myeloid differentiation primary response factor 88 (MyD88). The role of MyD88 in regulating innate immunity and Nuclear factor kappa-B (NF-κB)-activated responses targets this critical factor for influencing injury and recovery as well as maintaining immune homeostasis. Materials and methods: To examine the role of MyD88, we examined immune cells and factors during acute pneumonitic and fibrotic phases in Myd88-deficient animals receiving thoracic gamma (γ)-irradiation. Results: We found that MyD88 supports survival from radiation-induced injury through the regulation of inflammatory factors that aid in recovery from irradiation. The absence of MyD88 resulted in unresolved pulmonary infiltrate and enhanced collagen deposition plus elevated type 2 helper T cell (Th2) cytokines in long term survivors of irradiation. Conclusions: These results based only on a gene deletion model suggest that alterations of MyD88-dependent inflammatory processes impact chronic lung injury. Therefore, MyD88 may contribute to attenuating long-term radiation-induced lung injury and protecting against fibrosis. |
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Authors:
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Willie J Brickey; Isabel P Neuringer; William Walton; Xiaoyang Hua; Ellis Y Wang; Sushmita Jha; Gregory D Sempowski; Xuebin Yang; Suzanne L Kirby; Stephen L Tilley; Jenny P-Y Ting |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-1-16 |
Journal Detail:
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Title: International journal of radiation biology Volume: - ISSN: 1362-3095 ISO Abbreviation: - Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-1-17 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8809243 Medline TA: Int J Radiat Biol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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