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Serum immunoglobulin concentrations in diabetic patients
M S Ardawi1, H A Nasrat, A A Bahnassy
1Department of Clinical Biochemistry, College of Medicine, King Abdulaziz University Hospital, King Abdulaziz University, Jeddah, Saudi Arabia.
Summary
Diabetic patients show altered immunoglobulin levels, with increased IgA and IgG and decreased IgM. Serum IgA levels correlate with glycaemic control, suggesting a link to diabetic complications.
Area of Science:
- Immunology
- Endocrinology
- Clinical Chemistry
Background:
- Diabetes mellitus is associated with immune dysregulation.
- Immunoglobulin levels may be altered in diabetic patients.
- Glycaemic control is a key factor in diabetes management.
Purpose of the Study:
- To investigate the relationship between glycaemic control indices (HbA1c, fructosamine) and serum immunoglobulin levels (IgA, IgG, IgM) in diabetic patients.
- To compare immunoglobulin concentrations between diabetic patients and healthy controls.
- To explore the correlation between serum IgA and glycaemic control in diabetes.
Main Methods:
- Cross-sectional study comparing 110 diabetic patients (Type 1 and Type 2) with 111 healthy non-diabetic subjects.
- Measurement of serum IgA, IgG, and IgM concentrations.
- Assessment of glycaemic control using glycated haemoglobin (HbA1c) and fructosamine levels.
Main Results:
- Diabetic patients exhibited significantly elevated serum IgA (82.7%) and IgG (35.2%) levels, and significantly decreased IgM (46.7%) levels compared to controls (p < 0.001).
- Serum IgA showed strong correlations with fructosamine (r=0.77) and HbA1c (r=0.76) in the overall population, and moderate correlations with fructosamine (r=0.19) and HbA1c (r=0.28) in diabetic patients.
- Albumin levels negatively correlated with IgA (r=-0.58) in the entire cohort.
Conclusions:
- Abnormal serum IgA, IgG, and IgM levels are prevalent in diabetic patients.
- Serum IgA concentrations are significantly influenced by the degree of glycaemic control in diabetes.
- Further research is warranted to determine if immunoglobulin changes contribute to diabetic complications, such as increased infection susceptibility.