21402
Reverse transcription polymerase chain reaction ( RT - PCR ) and western blot analyses revealed that CK inhibited DMN - induced increases in matrix metalloproteinase - 13 ( MMP - 13 ) , tissue inhibitor of metalloproteinase - 1 ( TIMP - 1 ) , and tumor necrosis factor - alpha ( TNF - alpha ) mRNA , and collagen type I and alpha - smooth muscle actin protein .
 Chemical: DMN
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: DMN