Melatonin Modulates the Immune System Response and Inflammation in Diabetic Rats Experimentally-Induced by Alloxan

Area of Science:

• Immunology
• Endocrinology
• Pathology

Background:

• Diabetes mellitus (DM) is linked to increased proinflammatory cytokines like TNF-α and IL-1β.
• DM can cause monocyte chemotactic protein proliferation and affect immune cell populations.
• Lymphoid tissues are vulnerable to damage during the diabetic process.

Purpose of the Study:

• To investigate the effects of melatonin on proinflammatory cytokines in diabetic rats.
• To assess melatonin's impact on hematological values and lymphoid tissues in diabetes.
• To explore melatonin's potential role in immune system regulation during DM.

Main Methods:

• 36 male rats were divided into Control, Melatonin (Mel), Diabetes Mellitus (DM), and DM-Melatonin (DM-Mel) groups.
• Melatonin was administered intraperitoneally for 15 days to Mel and DM-Mel groups.
• Biochemical, hematological, and histological analyses were performed on serum and lymphoid tissues (spleen, thymus, lymph nodes).

Main Results:

• Diabetic rats exhibited increased proinflammatory cytokines, white blood cells, and lymphoid tissue destruction.
• Melatonin administration in diabetic rats (DM-Mel group) reduced IL-1β concentration and mast cell density.
• Melatonin treatment mitigated the destructive effects on lymphoid tissues observed in the DM group.

Conclusions:

• Melatonin may play a role in immune system regulation in diabetes.
• Melatonin treatment can inhibit proinflammatory cytokine production and mast cell accumulation.
• Melatonin administration may prevent lymphoid organ destruction during diabetes.