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Plausible involvement of a diabetic serum factor in neutrophil membrane pathology
Abstract:
With a view to determining the role of diabetic serum factor (DSF) in the progression of membrane pathology, time-dependent preincubation effects of DSF on certain membrane-bound enzymes of normal polymorphonuclear leucocytes (PMNL) have been studied. DSF is found to cause significant decrements in the activities of Na+/K+ ATPase, PLC and AcE of PMNL on in vitro incubation for 60 min, while the effect on Ca2+/Mg2+ ATPase appears only on prolonged incubation with an initial hike in activity at 5 min. The implications of these results have been discussed.
Insights
Diabetic serum factor (DSF) alters key enzymes in polymorphonuclear leucocytes (PMNL), potentially driving membrane damage. This study reveals DSF
Area of Science:
- Biochemistry
- Cell Biology
- Diabetic Complications
Background:
- Diabetic serum factor (DSF) is implicated in diabetic complications.
- Membrane pathology is a hallmark of advanced diabetes.
- Polymorphonuclear leucocytes (PMNL) play a role in inflammation and immune response.
Purpose of the Study:
- To investigate the role of diabetic serum factor (DSF) in membrane pathology.
- To determine the time-dependent effects of DSF on PMNL membrane-bound enzymes.
Main Methods:
- In vitro incubation of normal polymorphonuclear leucocytes (PMNL) with DSF.
- Measurement of enzyme activities (Na+/K+ ATPase, PLC, AcE, Ca2+/Mg2+ ATPase) over time.
Main Results:
- DSF significantly reduced Na+/K+ ATPase, PLC, and AcE activities in PMNL after 60 min incubation.
- Ca2+/Mg2+ ATPase activity showed an initial increase at 5 min, followed by a decrease upon prolonged incubation.
Conclusions:
- DSF induces time-dependent alterations in PMNL membrane-bound enzyme activities.
- These enzymatic changes may contribute to the membrane pathology observed in diabetes.