Sex modulated effects of sarin exposure in rats: Toxicity, hypothermia and inflammatory markers.

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  • Additional Information
    • Source:
      Publisher: Elsevier Science Country of Publication: Netherlands NLM ID: 7905589 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1872-9711 (Electronic) Linking ISSN: 0161813X NLM ISO Abbreviation: Neurotoxicology Subsets: MEDLINE
    • Publication Information:
      Publication: 2001- : Amsterdam : Elsevier Science
      Original Publication: Park Forest South, Ill., Pathotox Publishers.
    • Subject Terms:
      Sex Characteristics*; Encephalitis/*chemically induced ; Hypothermia/*chemically induced ; Nerve Agents/*toxicity ; Sarin/*toxicity; Animals ; Brain/drug effects ; Brain/metabolism ; Chemokine CCL2/blood ; Encephalitis/metabolism ; Female ; Male ; Rats, Sprague-Dawley ; Tissue Inhibitor of Metalloproteinase-1/blood
    • Abstract:
      This work focused on sex differences in rats exposed to sarin. Females were found to be more sensitive to sarin toxicity (LD50 67 μg/kg) than males (88 μg/kg), showed less acute hypothermic effects than males (at 120 min post sarin, 3.1 ± 1.1 and 4.5 ± 1 °C decrease, respectively), but with a significant slower recovery over days. Females' temperature response to the cholinergic agonist oxotremorine (0.25 mg/kg, im) was more pronounced than that of males (at 30 min, 3.13 ± 0.27 and 2.13 ± 0.19 °C decrease, respectively) and both sexes recovered within 2 h of exposure. 24 h after sarin exposure (80 μg/kg) followed 1 min later by TA treatment (TMB4 7.5 mg/kg and atropine 5 mg/kg) a 255% increase in plasma MCP-1 in males but not in females was recorded. In the brain, TIMP-1 increased 43 fold in females and 25 fold in males, compared to control rats. MCP-1 increased 8 fold in females only. TNFα increased in both sexes, but the increase in female brain was higher than that recorded in males. IL-6 increased in females but not in males. IL-1β increased in both sexes. This work clearly demonstrates significant sex modulation effects on measures of toxicity, hypothermia and inflammatory markers in brain and plasma 24 h following exposure to sarin. In general, females seem to be more sensitive to the toxicity of sarin, but may be better protected against its brain damage. In light of these and other findings, the efficacy of the various available treatments, as well as those being developed, should be evaluated in both sexes.
      (Copyright © 2018 Elsevier B.V. All rights reserved.)
    • Contributed Indexing:
      Keywords: Hypothermia; Inflammation; Oxotremorine; Rats; Sarin; Sex
    • Accession Number:
      0 (Ccl2 protein, rat)
      0 (Chemokine CCL2)
      0 (Nerve Agents)
      0 (TIMP1 protein, rat)
      0 (Tissue Inhibitor of Metalloproteinase-1)
      B4XG72QGFM (Sarin)
    • Publication Date:
      Date Created: 20180407 Date Completed: 20190321 Latest Revision: 20200914
    • Publication Date:
      20221213
    • Accession Number:
      10.1016/j.neuro.2018.04.002
    • Accession Number:
      29625196