4593
Protease - and protease inhibitor - specific microarray analyses ( CLIP - CHIP ) of laser - dissected leukocyte infiltrated and noninfiltrated pancreatic islets and confirmatory quantitative real time PCR and protein analyses identified cathepsin S , W , and C activity at sites of leukocyte penetration of the peri - islet BM in association with a macrophage subpopulation in NOD mice and human type 1 diabetic samples and , hence , potentially a novel therapeutic target specifically acting at the islet penetration stage .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None