8516
It may also be suggested that particular care should be taken when such a trans - dominant Rev mutant is considered to be used as a genetic therapy against HIV - I infection , in individuals infected with both HIV - I and HTLV - 1 .
 Rev mutant
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 Rev mutant