Preferential expression of matrix metalloproteinase-9 in mouse skin after sulfur mustard exposure.
Matrix metalloproteinases (MMPs), a class of enzymes responsible for the degradation of extracellular matrix proteins, play important roles in inflammatory and immune responses. In skin, MMP-2 (gelatinase A) and MMP-9 (gelatinase B) are normally inactive but can be expressed during tissue injury. Both degrade collagen IV and other critical components of the basement membrane zone that separates the epidermis from the dermis. The expression of MMP-2 and -9 was studied in sulfur mustard (SM)-exposed ear skin from mice to determine their role in tissue vesicant injury. Punch biopsies of mouse ears were collected between 6 and 168 h after exposure to 97.5 mM (0.08 mg) SM diluted in CH(2)Cl(2). They were examined histologically and assayed for MMP-2 and -9 expression by gelatinase activity assays, real-time reverse transcriptase-polymerase chain reaction and Western blot analysis. A time-related increase in overall gelatinase activity was observed in SM-treated ears. At 168 h after SM exposure, the relative levels of MMP-9 mRNA were increased 27-fold and MMP-9 protein 9-fold when compared with the control (CH(2)Cl(2) treated) ears. In contrast, there were no observable increases in the MMP-2 mRNA or protein levels between treated and control ears. These observations suggest the differential expression of MMP-2 and -9 during the cutaneous response to SM injury and suggest a role for MMP-9 in SM-induced injury.
Shakarjian
Michael P
MP
Department of Medicine, UMDNJ-Robert Wood Johnson Medical School, Piscataway, NJ 08854-5635, USA.
Bhatt
Pinaki
P
Gordon
Marion K
MK
Chang
Yoke-Chen
YC
Casbohm
Stacy L
SL
Rudge
Thomas L
TL
Kiser
Robyn C
RC
Sabourin
Carol L
CL
Casillas
Robert P
RP
Ohman-Strickland
Pamela
P
Riley
David J
DJ
Gerecke
Donald R
DR
D000818:Animals; D001768:Blister / Q000139:chemically induced* / Q000201:enzymology / Q000473:pathology; D015153:Blotting, Western; D002619:Chemical Warfare Agents / Q000633:toxicity*; D015870:Gene Expression / Q000187:drug effects; D020778:Matrix Metalloproteinase 2 / Q000096:biosynthesis; D020780:Matrix Metalloproteinase 9 / Q000096:biosynthesis*; D051379:Mice; D009151:Mustard Gas / Q000633:toxicity*; D012333:RNA, Messenger / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012867:Skin / Q000187:drug effects* / Q000201:enzymology / Q000473:pathology
D002619:Chemical Warfare Agents; D012333:RNA, Messenger; D020778:Matrix Metalloproteinase 2; D020780:Matrix Metalloproteinase 9; D009151:Mustard Gas