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C/EBPd protects from radiation-induced intestinal injury and sepsis by suppression of inflammatory and nitrosative stress

  1. Author:
    Banerjee, Sudip [ORCID]
    Fu, Qiang [ORCID]
    Shah, Sumit K [ORCID]
    Melnyk, Stepan B
    Sterneck,Esta [ORCID]
    Hauer-Jensen, Martin [ORCID]
    Pawar, Snehalata A [ORCID]

  2. Author Address

    Division of Radiation Health, Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA., Arkansas Children 39;s Research Institute, Little Rock, AR, 72202, USA., Laboratory of Cell and Developmental Signaling, Center for Cancer Research, National Cancer Institute, Frederick, MD, 21702, USA., Division of Radiation Health, Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA. SAPawar@uams.edu.,
    1. Year: 2019
    2. Date: Sep 27
    3. Epub Date: 2019 09 27
  2. Journal: Scientific reports
    1. 9
    2. 1
    3. Pages: 13953
  4. Type of Article: Article
  5. Article Number: 13953
  6. ISSN: 2045-2322
  1. Abstract:

    Ionizing radiation (IR)-induced intestinal damage is characterized by a loss of intestinal crypt cells, intestinal barrier disruption and translocation of intestinal microflora resulting in sepsis-mediated lethality. We have shown that mice lacking C/EBPd display IR-induced intestinal and hematopoietic injury and lethality. The purpose of this study was to investigate whether increased IR-induced inflammatory, oxidative and nitrosative stress promote intestinal injury and sepsis-mediated lethality in Cebpd-/- mice. We found that irradiated Cebpd-/- mice show decreased villous height, crypt depth, crypt to villi ratio and expression of the proliferation marker, proliferating cell nuclear antigen, indicative of intestinal injury. Cebpd-/- mice show increased expression of the pro-inflammatory cytokines (Il-6, Tnf-a) and chemokines (Cxcl1, Mcp-1, Mif-1a) and Nos2 in the intestinal tissues compared to Cebpd+/+ mice after exposure to TBI. Cebpd-/- mice show decreased GSH/GSSG ratio, increased S-nitrosoglutathione and 3-nitrotyrosine in the intestine indicative of basal oxidative and nitrosative stress, which was exacerbated by IR. Irradiated Cebpd-deficient mice showed upregulation of Claudin-2 that correlated with increased intestinal permeability, presence of plasma endotoxin and bacterial translocation to the liver. Overall these results uncover a novel role for C/EBPd in protection against IR-induced intestinal injury by suppressing inflammation and nitrosative stress and underlying sepsis-induced lethality.

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External Sources

  1. View Full Text
  2. DOI: 10.1038/s41598-019-49437-x
  3. PMID: 31562350
  4. View record in Web of Science®
  5. WOS: 000488222500005
  6. PII : 10.1038/s41598-019-49437-x

Library Notes

  1. Fiscal Year: FY2019-2020
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