 In the June–August 2007 parliamentary election, Itoua was elected to the National Assembly as the candidate of the ruling Congolese Party of Labour (PCT) for Ollombo I constituency; he won the seat in the first round with 68.71% of the vote, defeating independent candidate Fidèle Bossa and Club 2002-PUR candidate Paud Rock Joseph.In a minor government reshuffle on 12 December 2011, Itoua switched ministries with Henri Ossébi, becoming Minister of Scientific Research.Itoua stood again as the PCT candidate for Ollombo I constituency in the July–August 2012 parliamentary election; he again won the seat in the first round of voting, receiving 100% of the vote.