| Exclusion Criteria: | 1) The subject has received anticancer treatment (eg, chemotherapy, radiotherapy, cytokines, investigational agent, or hormones), except interferon, imatinib, dasatinib, or nilotinib within 14 days before the first dose of Xl228.
2) The subject has received interferon, imatinib, dasatinib or nilotinib within 7 days of the first dose of XL228.
3) The subject has received immunosuppressive therapy (eg, cyclosporine, steroids, tacrolimus for graft-versus-host disease [GVHD]) within 28 days before the first dose of XL228.
4) The subject is currently taking medication known to be a potent CYP3A4 inhibitor or inducer.
5) The subject meets any of the following cardiac criteria: a) Inability to measure QT interval (eg, subject has a pacemaker or left bundle branch block); b) Corrected QT interval (QTc) of > 460 msec.; c) Known family history of congenital long QT syndrome or unexplained sudden death (NOTE: Subjects with a family history of these events may be potentially eligible if agreed to by the sponsor); d) History of sustained ventricular arrhythia;
6) **continued from above: e) History of significant heart disease (eg, congestive heart failure, myocardial infarction, angina) (NOTE: Subjects who have had chronic heart failure may still be enrolled if echocardiogram or MUGA (multi gated acquisition scan) are normal AND with sponsor approval); f) Current atrial tachyarrhythmia; g) Heart rate of < 50 beats per minute (bpm); h) Uncontrolled hypertension (>150 mm Hg systolic or > 100 mm Hg diastolic).
7) The subject is currently taking drugs known to be associated with Torsades de Pointes or significant QT interval prolongation.
8) The subject has not recovered to CTCAE v3.0 Grade </= 1 from toxicities related to peripheral stem cell or bone marrow transplant.
9) The subject has not recovered to CTCAE v3.0 Grade </= 1 from clinically significant AEs due to anticancer therapy.
10) The subject has known allergy or hypersensitivity to any component of the investigational drug product.
11) The subject has uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, diabetes, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements.
12) The subject has a fasting blood glucose > 160 mg/dL at baseline. (NOTE: If random plasma glucose results are < 160 mg/dL at baseline, then the subject meets this eligibility criteria)
13) The subject is pregnant or breastfeeding.
14) The subject is known to be positive for the human immunodeficency virus (HIV).
15) The subject has an inability or unwillingness to abide by the study protocol or cooperate fully with the investigator or designee. |