Nov 28 (Reuters) - Acasti Pharma Inc ACST.V
* Acasti Pharma appoints Linda O'keefe as chief financial officer
* Says CFO Mario Paradis resigned
* Acasti Pharma Inc - Paradis has resigned as CFO from Acasti to focus solely on his role as vice president and chief financial officer of Neptune Source text for Eikon: Further company coverage: ACST.V