Metformin Loaded Zein Polymeric Nanoparticles to Augment Antitumor Activity against Ehrlich Carcinoma via Activation of AMPK Pathway: D-Optimal Design Optimization, In Vitro Charac... oleh Yasmina Elmahboub, Rofida Albash, Mira Magdy William, Amal H. Rayan, Najat O. Hamed, Mona S. Ousman, Nahed A Raslan, Shaimaa Mosallam