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Transforming growth factor - beta ( TGF - beta ) inhibits cell cycle progression , in part through up - regulation of gene expression of the p21 ( WAF1 / Cip1 ) ( p21 ) cell cycle inhibitor .
 GENE: Transforming growth factor - beta; GENE: TGF - beta; GENE: p21; GENE: WAF1; GENE: Cip1; GENE: p21
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: Transforming growth factor - beta; GENE: TGF - beta; GENE: p21; GENE: WAF1; GENE: Cip1; GENE: p21