03/30/2016 10:48 EDT | Updated 03/31/2017 01:12 EDT

Embattled stem cell scientist says charges against him false

LONDON — Italian scientist Dr. Paolo Macchiarini, who was once considered a stem cell pioneer but was fired last week by his university for breaching medical ethics, says the allegations against him are false.

In the last year, Macchiarini has been accused of doctoring his resume, scientific misconduct and misrepresenting his work. Macchiarini was dismissed Thursday by Sweden's Karolinska University for reasons including breaching the institution's "fundamental values."

In an email Tuesday night to The Associated Press, Macchiarini disputed the accusations. He calls them "entirely false" and says "I am now in the process of instructing lawyers to defend my reputation vigorously."

Karolinska's first investigation into Macchiarini found him guilty of scientific misconduct while the second cleared him. A third investigation is ongoing.

The Associated Press