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Sulfur mustard induced mast cell degranulation in mouse skin is inhibited by a novel anti-inflammatory and anticholinergic bifunctional prodrug.

  • Joseph, Laurie B1
  • Composto, Gabriella M2
  • Perez, Roberto M2
  • Kim, Hong-Duck3
  • Casillas, Robert P4
  • Heindel, Ned D5
  • Young, Sherri C5
  • Lacey, Carl J5
  • Saxena, Jaya5
  • Guillon, Christophe D5
  • Croutch, Claire R4
  • Laskin, Jeffrey D2
  • Heck, Diane E3
  • 1 Rutgers University, Piscataway, NJ, United States. Electronic address: [email protected] , (United States)
  • 2 Rutgers University, Piscataway, NJ, United States. , (United States)
  • 3 New York Medical College, Valhalla, NY, United States. , (United States)
  • 4 MRIGlobal, Kansas City, MO, United States. , (United States)
  • 5 Lehigh University, Bethlehem, PA, United States. , (United States)
Published Article
Toxicology letters
Publication Date
Nov 07, 2017
DOI: 10.1016/j.toxlet.2017.11.005
PMID: 29127031


Sulfur mustard (SM, bis(2-chloroethyl sulfide) is a potent vesicating agent known to cause skin inflammation, necrosis and blistering. Evidence suggests that inflammatory cells and mediators that they generate are important in the pathogenic responses to SM. In the present studies we investigated the role of mast cells in SM-induced skin injury using a murine vapor cup exposure model. Mast cells, identified by toluidine blue staining, were localized in the dermis, adjacent to dermal appendages and at the dermal/epidermal junction. In control mice, 48-61% of mast cells were degranulated. SM exposure (1.4g/m3 in air for 6min) resulted in increased numbers of degranulated mast cells 1-14days post-exposure. Treatment of mice topically with an indomethacin choline bioisostere containing prodrug linked by an aromatic ester-carbonate that targets cyclooxygenases (COX) enzymes and acetylcholinesterase (1% in an ointment) 1-14days after SM reduced skin inflammation and injury and enhanced tissue repair. This was associated with a decrease in mast cell degranulation from 90% to 49% 1-3days post SM, and from 84% to 44% 7-14days post SM. These data suggest that reduced inflammation and injury in response to the bifunctional indomethacin prodrug may be due, at least in part, to abrogating mast cell degranulation. The use of inhibitors of mast cell degranulation may be an effective strategy for mitigating skin injury induced by SM.

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