Histone Deacetylase Inhibitor LBH589 in Addition to Corticosteroids in Patients With Acute Graft Versus Host Disease (GVHD)

"Phase I Initial Treatment Plan - Intravenous (IV) Formulation: Up to 4 dose levels (DL) of LBH589 IV formulation to establish LBH589 Maximum Tolerated Dose (MTD) in acute GVHD treatment. The first 4 participants began this treatment plan, before the IV Formulation became unavailable.~DL -1: 1.25 mg/m\^2 IV; DL 1: 2.5 mg/m\^2 IV; DL 2: 5 mg/m\^2 IV; DL 3: 7.5 mg/m\^2 IV; DL 4: 10 mg/m\^2 IV.~Phase I Revised Treatment Plan - Oral Formulation (to replace IV Formulation): Dose escalation levels for LBH589; participants treated with LBH589 by mouth (PO) 3 times a week (48 hours apart) every week for 4 weeks.~DL -1: 5 mg PO; DL 1: 10 mg PO (starting dose level); DL 2: 15 mg PO; DL 3: 20 mg PO; DL 4: 25 mg PO.~Phase II Treatment Plan: LBH589 PO at MTD, 3 times a week (48 hours apart) every week for 4 weeks."