Immune dysfunction in patients with diabetes mellitus (DM)

Area of Science:

• Immunology
• Endocrinology
• Infectious Diseases

Background:

• Diabetes mellitus (DM) is associated with increased infection incidence and severity.
• Immune system dysfunction is a suspected cause of heightened infection susceptibility in diabetic patients.
• While adaptive immunity appears largely unaffected, innate immunity shows disturbances in DM.

Purpose of the Study:

• To investigate the impact of diabetes mellitus on immune function and infection susceptibility.
• To explore the mechanisms underlying increased infection risk in diabetic individuals.
• To assess the role of innate immunity defects in diabetic patients' infections.

Main Methods:

• Review of existing literature on immune responses in patients with diabetes mellitus.
• Analysis of studies examining cellular and humoral innate immunity in diabetic versus non-diabetic individuals.
• Investigation of microbial virulence and adherence in high-glucose environments.

Main Results:

• Diabetic patients exhibit impaired functions of polymorphonuclear cells, monocytes, and macrophages.
• Humoral innate immunity shows disturbances, including low complement factor 4 and altered cytokine responses.
• Some microorganisms exhibit increased virulence and adherence to cells in high-glucose conditions.
• Better glycemic control in DM correlates with improved immune cell function.

Conclusions:

• Defects in cellular innate immunity are prevalent in patients with diabetes mellitus.
• These immune deficits, coupled with enhanced microbial virulence and adherence, contribute to increased infection risk.
• Therapeutic strategies aimed at improving glycemic control may help mitigate infection susceptibility in diabetic patients.