The subject invention pertains to materials and methods for the prevention and treatment of disease conditions associated with oxidative stress or a compromised reducing environment, including inflammatory bowel diseases such as ulcerative colitis. Another aspect of the subject invention concerns compositions formulated for administration as an enema. The subject invention also concerns compositions formulated for oral administration. Methods of the invention include administration of compounds or compositions of the invention. In one embodiment, compounds or compositions of the invention are rectally instilled in a patient. In another embodiment, compounds or compositions are orally administered.
