Pharmaceutical giant AbbVie has filed a lawsuit against cancer treatment maker BeiGene in Chicago federal court. The lawsuit accuses BeiGene of stealing trade secrets to develop a competing cancer-fighting therapy after hiring away a former longtime senior AbbVie scientist. AbbVie claims that the stolen trade secrets were used to develop a drug that targets and destroys a molecule present in B cell growth. The company is seeking unspecified monetary damages and a court order to recover and protect its trade secrets.