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Diabetic Microvascular Disease and Pulmonary Fibrosis: The Contribution of Platelets and Systemic Inflammation
Rekha Jagadapillai1, Madhavi J Rane2,3, Xingyu Lin4,5
1Department of Pediatrics, School of Medicine, University of Louisville, Louisville, KY 40292, USA. rekha.jagadapillai@louisville.edu.
Abstract:
Diabetes is strongly associated with systemic inflammation and oxidative stress, but its effect on pulmonary vascular disease and lung function has often been disregarded. Several studies identified restrictive lung disease and fibrotic changes in diabetic patients and in animal models of diabetes. While microvascular dysfunction is a well-known complication of diabetes, the mechanisms leading to diabetes-induced lung injury have largely been disregarded. We described the potential involvement of diabetes-induced platelet-endothelial interactions in perpetuating vascular inflammation and oxidative injury leading to fibrotic changes in the lung. Changes in nitric oxide synthase (NOS) activation and decreased NO bioavailability in the diabetic lung increase platelet activation and vascular injury and may account for platelet hyperreactivity reported in diabetic patients. Additionally, the Janus kinase/signal transducer and activator of transcription (JAK/STAT) pathway has been reported to mediate pancreatic islet damage, and is implicated in the onset of diabetes, inflammation and vascular injury. Many growth factors and diabetes-induced agonists act via the JAK/STAT pathway. Other studies reported the contribution of the JAK/STAT pathway to the regulation of the pulmonary fibrotic process but the role of this pathway in the development of diabetic lung fibrosis has not been considered. These observations may open new therapeutic perspectives for modulating multiple pathways to mitigate diabetes onset or its pulmonary consequences.
Insights
Diabetes can cause lung disease through inflammation and oxidative stress, impacting lung function. This study explores how platelet interactions and the JAK/STAT pathway contribute to diabetic lung fibrosis.
Area of Science:
- Pulmonary Medicine
- Endocrinology
- Vascular Biology
Background:
- Diabetes is linked to systemic inflammation and oxidative stress, yet its impact on lung function and pulmonary vascular disease is often overlooked.
- Diabetic patients and animal models exhibit restrictive lung disease and fibrotic changes, indicating diabetes-induced lung injury.
- Microvascular dysfunction is a known diabetic complication, but the specific mechanisms driving lung injury remain under-explored.
Purpose of the Study:
- To investigate the mechanisms of diabetes-induced lung injury, focusing on platelet-endothelial interactions and the Janus kinase/signal transducer and activator of transcription (JAK/STAT) pathway.
- To explore the role of nitric oxide synthase (NOS) dysregulation and JAK/STAT signaling in the development of pulmonary fibrosis in diabetes.
- To identify potential therapeutic targets for mitigating diabetic lung complications.
Main Methods:
- Review of existing literature on diabetes, pulmonary disease, inflammation, oxidative stress, and the JAK/STAT pathway.
- Analysis of proposed mechanisms involving platelet-endothelial interactions and nitric oxide (NO) bioavailability in diabetic lungs.
- Examination of the JAK/STAT pathway's established roles in pancreatic damage, inflammation, vascular injury, and fibrosis.
Main Results:
- Diabetes-induced platelet-endothelial interactions may perpetuate vascular inflammation and oxidative injury, leading to lung fibrosis.
- Decreased nitric oxide (NO) bioavailability due to altered nitric oxide synthase (NOS) activation in the diabetic lung promotes platelet activation and vascular injury.
- The JAK/STAT pathway, implicated in diabetes onset and vascular injury, may also contribute to diabetic lung fibrosis, though this has not been previously considered.
Conclusions:
- Diabetes-associated inflammation and oxidative stress contribute to pulmonary vascular disease and lung fibrosis.
- Dysregulation of NOS/NO pathways and increased platelet activity are key factors in diabetes-induced lung injury.
- The JAK/STAT pathway presents a potential therapeutic target for managing diabetic lung complications, including fibrosis.
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