Cell-based therapy is increasingly important in modern medicine for the treatment of various diseases including those related to the endocrine system, central nervous system, as well as cancer and cardiovascular disease. Among the treatment options for the aforementioned diseases is organ transplantation, however the number of donors is not sufficient for patients waiting to receive an organ. Moreover, these patients are required to take immunosuppressants for the rest of their lives to prevent rejection. Another possible solution may be hormonal replacement therapies, but even these treatments are not sufficient to restore the metabolic interactions of hormones. Cellular encapsulation systems are one of the leading strategies to recover the function of organs.