Glucocorticoid receptors in lymphocytes and stability of kidney graft function

Area of Science:

• Immunology
• Pharmacology
• Transplantation Medicine

Background:

• Glucocorticoids are crucial for preventing organ rejection after transplantation.
• Some patients exhibit resistance to glucocorticoid therapy, impairing treatment efficacy.
• Glucocorticoid receptor (GR) function is key to mediating steroid effects.

Purpose of the Study:

• To investigate glucocorticoid receptor abnormalities in kidney transplant patients.
• To determine if altered GR binding or function contributes to glucocorticoid resistance.
• To compare GR characteristics between patients with stable grafts and chronic rejection.

Main Methods:

• Analysis of glucocorticoid receptors in peripheral blood lymphocytes.
• Assessment of corticosteroid binding and receptor translocation into nuclei.
• Patient stratification based on kidney graft stability (stable vs. chronic rejection).

Main Results:

• Significant changes in glucocorticoid receptor level and binding affinity were observed in patients with chronic allograft rejection.
• These alterations differed compared to both control levels and patients with stable graft function.
• Receptor translocation into nuclei was noted, suggesting potential post-receptor resistance mechanisms.

Conclusions:

• Alterations in glucocorticoid receptors play a role in glucocorticoid sensitivity in kidney transplant recipients.
• The findings suggest that impaired GR function contributes to glucocorticoid resistance.
• Unknown post-receptor events may also be involved, necessitating further investigation in organ transplantation.