Vorinostat, Isotretinoin and Temozolomide in Adults With Recurrent Glioblastoma Multiforme (GBM)

Study Groups:

If you are found to be eligible to take part in this study, you will be randomly assigned (as in the flip of a coin) to 1 of 3 groups. If you are on of the first 30 participants in the study, you will be randomly assigned to a group. If you are enrolled after the first 30 participants, you will be more likely to be enrolled in the group that is showing better results.

* If you are in Group 1, you will take vorinostat and isotretinoin. * If you are in Group 2, you will take isotretinoin and temozolomide. * If you are in Group 3, you will take vorinostat, isotretinoin and temozolomide.

Study Drug Administration:

Each study cycle is 28 days.

You will take vorinostat by mouth once a day during Days 1-7 and Days 15-21 of each cycle. You should take vorinostat by mouth in the morning, at about the same time each day. Vorinostat capsules should be swallowed whole and should not be opened. If a capsule is damaged or broken, spills of powder from vorinostat capsules should be cleaned up carefully. If you come in contact with the powder, you should wash your hands thoroughly. If the spill is on a surface, the area must be washed at least 3 times with rubbing alcohol, followed by water. Vorinostat capsules should be stored at room temperature (59°-86°F \[15°-30°C\]) in a dry area. You should take vorinostat with food, but not a high fat meal.

You will also take isotretinoin by mouth 2 times a day on Days 1-21 of each cycle.

You will take temozolomide by mouth once a day on Days 1-7 and Days 15-21 of each cycle. You should take temozolomide by mouth at bedtime, at about the same time each day. You should swallow the temozolomide capsules whole, one right after the other, without chewing them. They should be taken on an empty stomach (at least 2 hours after eating) with 1 cup (about 8 ounces) of water.

If you vomit while taking vorinostat, isotretinoin and/or temozolomide, you should not "make up" the dose. You should wait until the next scheduled dose.

Study Visits:

At Week 2 of every cycle:

° Blood (about 1 teaspoons) will be drawn for routine tests.