8810
At physiological doses , either insulin - like growth factor I ( IGF - I ) or insulin turned out to be as potent as dibutyryl cAMP ( dbcAMP ) in increasing UCP1 gene transcription rate ( 1 h ) and also UCP1 mRNA accumulation ( 3 h ) , their maximal effect ( 15 - fold increase ) reached upon treatment for 24 h .
 insulin - like growth factor I, IGF - I, insulin, UCP1 gene, UCP1 mRNA
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 insulin - like growth factor I, IGF - I, insulin, UCP1 gene, UCP1 mRNA