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Differentiated Mouse Adipocytes in Primary Culture: A Model of Insulin Resistance
Published on: February 17, 2023
Insulin resistance is associated with at least threefold increased risk for prothrombotic state in severely obese
Assimina Galli-Tsinopoulou1, Ioannis Kyrgios, Ioanna Maggana
14th Department of Pediatrics, Medical School, Aristotle University of Thessaloniki, Papageorgiou General Hospital, Thessaloniki, Greece. gallitsin@gmail.com
Insights
Childhood obesity with insulin resistance significantly elevates prothrombotic factors, increasing the risk of early cardiovascular disease. This finding highlights the link between metabolic health in youth and adult cardiovascular outcomes.
Area of Science:
- Pediatric Endocrinology
- Cardiovascular Health
- Thrombosis Research
Background:
- Childhood obesity is a growing concern linked to future cardiovascular disease.
- The specific mechanisms connecting childhood obesity to cardiovascular risk remain incompletely understood.
- Prothrombotic factors play a crucial role in the development of cardiovascular and thrombotic events.
Purpose of the Study:
- To measure prothrombotic factor levels in obese children and adolescents.
- To investigate the association between obesity, insulin resistance, and prothrombotic factors.
- To explore the implications for early cardiovascular disease risk.
Main Methods:
- Cross-sectional study of 313 obese children and adolescents.
- Measurement of anthropometric parameters, prothrombotic factors (PAI-1-Ag, vWF-Ag, fibrinogen), lipids, glucose, and insulin.
- Assessment of insulin resistance using the Homeostasis Model Assessment for Insulin Resistance (HOMA-IR) index.
Main Results:
- Insulin-resistant participants showed significantly higher levels of PAI-1-Ag and vWF-Ag.
- Elevated PAI-1-Ag and vWF-Ag levels were associated with a 3-5 fold increased risk in insulin-resistant individuals.
- Prothrombotic factors (PAI-1-Ag, vWF-Ag) correlated positively with BMI, insulin levels, and HOMA-IR.
Conclusions:
- Obesity combined with insulin resistance in youth is linked to elevated prothrombotic factors.
- This prothrombotic state may contribute to the early development of atherothrombosis.
- These findings suggest a mechanism for increased cardiovascular disease risk in adulthood.
Unlabelled:
Obesity in childhood increases the risk for early adult cardiovascular disease. However, the underlying mechanism is not fully known. The aims of this study were to measure levels of prothrombotic factors and examine their possible association with obesity and insulin resistance in obese children and adolescents. A total of 313 obese children and adolescents were recruited. In a cross-sectional design, we measured anthropometric parameters, plasminogen activator inhibitor-1-antigen (PAI-1-Ag), von Willebrand factor-antigen (vWF-Ag), fibrinogen (FB), lipids, fasting glucose, and insulin (FI) levels. Insulin resistance was estimated using the homeostasis model assessment for insulin resistance (HOMA-IR) index. Boys presented significantly higher PAI-1-Ag levels than girls (82.6 vs. 71.3 ng/ml, p = 0.01). Higher levels of PAI-1-Ag (96.8 vs. 69 ng/ml, p < 0.001), vWF-Ag (123.5 vs. 107.6%, p = 0.004) but not FB (353.1 vs. 337.6 mg/dl, p = 0.137) were found in insulin-resistant (IR) participants after adjusted for age, gender, and pubertal stage. IR patients were at 2.98 (CI: 1.084-8.193) and 4.86 (CI: 1.119-15.606) times greater risk for high PAI-1-Ag and vWF-Ag levels, respectively. All three prothrombotic factors were positively correlated with body mass index (BMI) and FI levels (p < 0.05), but only PAI-1-Ag and vWF-Ag were significantly correlated with HOMA-IR index (p ≤ 0.001). After adjustment for confounding factors, both BMI and HOMA-IR indices remained significantly associated with PAI-1-Ag (r₂ = 0.225, p < 0.001) and vWF-Ag levels (r₂ =0.077, p = 0.003).
Conclusion:
This study shows that obesity in youngsters, when accompanied with insulin resistance, is associated with at least threefold increased risk for elevated levels of prothrombotic factors, contributing to the early development of atherothrombosis. This impaired prothrombotic state may partially explain the increased risk for developing cardiovascular disease later in adulthood.
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