Introduction
The most frequently used immunosuppressive drugs and their modes of action are briefly summarized below.

Corticosteroids
This group of drugs has potent and direct anti-inflammatory…

Cytokine Therapy
The experimental and clinical applications of cytokines, as biologic response modifiers and therapeutic agents, have been greatly expanded in recent years. Some cytokines, such as tumor necrosis factor and interferon alfa,…

Introduction
Organ transplants are in widespread use. Limitations include the scarcity of donor organs and expense. Failure to achieve successful grafts is primarily due to histoincompatibility and lack of safe…