Related Experiment Videos
[Evaluation of factors influencing platelet aggregation in patients with chronic glomerulonephritis (CGN)]
Z Zdrojewski1, A Raszeja-Specht, J Kustosz
1Z Kliniki Chorób Nerek Akademii Medycznej w Gdańsku.
Insights
Platelet hyperaggregation is linked to hypercoagulation in chronic glomerulonephritis (CGN). Spontaneous platelet aggregation (SPA) occurs in CGN patients, particularly those with nephrotic syndrome (NS), and is associated with hypoalbuminemia and dyslipidemia.
Area of Science:
- Nephrology
- Hematology
- Pathophysiology
Background:
- Platelets (PLT) are implicated in hemostasis, immune responses, and the pathogenesis of atherosclerosis and glomerulosclerosis.
- Understanding platelet behavior in chronic glomerulonephritis (CGN) is crucial for managing associated complications.
Purpose of the Study:
- To investigate morphological and functional platelet changes in CGN patients.
- To correlate these platelet alterations with disturbances in lipid, protein, and coagulation factors.
Main Methods:
- Studied 60 CGN patients (30 CGN, 30 CGN+Nephrotic Syndrome [NS]).
- Assessed platelet count, mean platelet volume (MPV), and modal platelet volume (PLT-Mode).
- Evaluated platelet function via aggregometry and measured spontaneous platelet aggregation (SPA).
Main Results:
- SPA was observed in 30% of CGN and 63% of CGN+NS patients.
- Higher MPV and PLT-Mode were noted in patients with SPA.
- SPA correlated with hypoalbuminemia, elevated triglycerides and LDL cholesterol, and shorter activated partial thromboplastin time (APTT).
Conclusions:
- Platelet hyperaggregation contributes to hypercoagulation in CGN.
- SPA is prevalent in CGN patients, especially with NS, suggesting a multifactorial pathomechanism.
- Hypoalbuminemia, dyslipidemia, and altered coagulation parameters likely contribute to SPA in CGN.
Abstract:
Platelets (PLT) play an important role in hemostasis, modulation of immunological and inflammatory processes. There is also evidence that PLT takes part in the development of atherosclerosis and glomerulosclerosis. The aim of presented study was to determine morphological and functional changes of platelets and their relation to the lipid, protein and coagulation factors disturbances in patients with chronic glomerulonephritis (CGN). The studies were carried out in 60 patients with CGN diagnosed by renal biopsy: 30 patients without nephrotic syndrome (NS)-CGN and 30 patients with NS-CGN+NS. Protein and lipid disturbances, coagulation factors were estimated using routine laboratory methods. Platelet count (PLT), mean platelet volume (MPV) and modal platelet volume (PLT-Mode) were measured using Technicon H1 hematological autoanalyser. Platelet function was assessed by aggregometry using turbidimetric method (inductors: ADP 1-3 microM, collagen 50g/ml, epinephrine 0.25-5 microM). Spontaneous platelet aggregation (SPA) was measured in platelet rich plasma (PRP) without inductors for 15 min, in 1-2 hours after venesection. SPA was observed in 9 of 30 patients with CGN and in 19 of 30 patients with CGN+NS. MPV and PLT Mode were significantly higher in patient showing SPA compared with those without. Significant correlations between SPA and the concentration of plasma albumin (r = -0,70; p < 0.02) TG and CH-LDL (r = 0,61; p < 0.05) were found in CGN+NS patients. APTT was significantly shorter in patients showing SPA compared with those without and negative significant correlation between SPA and APTT was found. Platelet aggregation to inductors in CGN and CGN+NS patients was diminished compared with control group. Lack of second phase aggregation in response to aggregation inducers was observed in patients with SPA. Conclusions. 1. Platelet hyperaggregation play an important role in hypercoagulation state in CGN patients. 2. SPA in vitro was observed in majority of CGN+NS patients and in some without NS. 3. Pathomechanism of SPA is probably multifactorial (hypoalbuminemia, dyslipidemia, changes in concentration of coagulation parameters).