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RESEARCH DESIGN AND METHODS : We explore the protective role of Nrf2 against diabetic nephropathy using human kidney biopsy tissues from diabetic nephropathy patients , a streptozotocin - induced diabetic nephropathy model in Nrf2 ( - / - ) mice , and cultured human mesangial cells .
 Disease: diabetic nephropathy; Disease: diabetic nephropathy; Chemical: streptozotocin; Disease: diabetic nephropathy
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: diabetic nephropathy; Disease: diabetic nephropathy; Chemical: streptozotocin; Disease: diabetic nephropathy