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Lectin binding in the diabetic rat kidney.

T H Rosenquist, T Huff

    Histochemistry
    |January 1, 1985
    PubMed
    Summary

    This study shows that diabetes significantly increases lectin binding in rat kidneys. Concanavalin A (Con A) and Bandieraea simplicifolia isolectin II (BSA II) binding were elevated in diabetic rats, indicating kidney tissue changes.

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    Area of Science:

    • Nephrology
    • Biochemistry
    • Diabetology

    Background:

    • Diabetes mellitus is a complex metabolic disorder with significant implications for kidney health.
    • Alterations in kidney glycoproteins are known to occur during the progression of diabetes.
    • Lectins, such as Concanavalin A (Con A) and Bandieraea simplicifolia isolectin II (BSA II), are proteins that bind specifically to carbohydrate structures and can serve as probes for tissue composition.

    Purpose of the Study:

    • To investigate the changes in lectin binding patterns in the kidneys of rats with untreated diabetes.
    • To quantify the binding of Concanavalin A (Con A) and Bandieraea simplicifolia isolectin II (BSA II) in diabetic rat kidneys compared to controls.

    Main Methods:

    • Kidney sections from control rats and rats with 70 or 200 days of untreated diabetes were analyzed.
    • Metal-conjugated lectins, Concanavalin A (Con A) and Bandieraea simplicifolia isolectin II (BSA II), were applied to tissue sections.
    • Lectin binding was quantified using atomic absorption spectrophotometric analysis of conjugated metals (iron or copper).

    Main Results:

    • Concanavalin A (Con A) binding significantly increased in the kidneys of diabetic rats compared to controls.
    • BSA II binding also showed a significant increase in diabetic rat kidneys.
    • Con A binding was specifically inhibited by alpha-D-mannoside, confirming its specificity, and enhanced by NaHB4 preincubation.

    Conclusions:

    • Untreated diabetes leads to significant alterations in kidney lectin-binding glycoproteins.
    • Both Concanavalin A (Con A) and Bandieraea simplicifolia isolectin II (BSA II) binding increase with diabetes duration, suggesting changes in kidney structure and composition.
    • These findings highlight potential biomarkers for diabetic nephropathy and underscore the impact of diabetes on renal tissue.

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