Hypertension and insulin resistance: implications of mitochondrial dysfunction
Walter Manucha1, Bob Ritchie, León Ferder
1Área de Farmacología, Departamento de Patología, Facultad de Ciencias Médicas, Universidad Nacional de Cuyo Centro Universitario, Mendoza, 5500, Argentina, wmanucha@yahoo.com.ar.
Abstract:
Mitochondria are the primary generators of cellular reactive oxygen species (ROS); their pathophysiological roles in hypertension and insulin resistance are but imperfectly understood. Mitochondrial dysfunction has been linked to the etiologies of many complex diseases, but many other factors, including the upregulation of the renin-angiotensin system (RAS) and vitamin D deficiency, have also been implicated in hypertension pathogenesis. Hypertension resulting from the disruption of the RAS contributes to the risk of cardiovascular disease. Likewise, experimental and clinical evidence indicate that RAS stimulation and low vitamin D levels are inversely related and represent risk factors associated with the pathogenesis of hypertension. Furthermore, RAS activation induces insulin resistance, resulting in increases in ROS levels. High levels of ROS are harmful to cells, having the potential to trigger both mitochondrial-mediated apoptosis and the degradation of the mitochondrial DNA. Diabetes risk is also associated with high levels of oxidative stress; taking vitamin D, however, may reduce that risk. The finding that mitochondria possess both a functional RAS and vitamin D receptors is the starting point for improving our understanding of the interaction of mitochondria and chronic disease states, which understanding should lead to decreases in the chronic disease burden attributable to hypertension, diabetes, or both.
Insights
Mitochondria generate reactive oxygen species (ROS), impacting hypertension and insulin resistance. Understanding mitochondrial ROS, renin-angiotensin system (RAS) interactions, and vitamin D
Area of Science:
- Mitochondrial biology and cellular metabolism.
- Cardiovascular pathophysiology.
- Endocrinology and metabolic disease.
Background:
- Mitochondria are key producers of cellular reactive oxygen species (ROS), with poorly understood roles in hypertension and insulin resistance.
- Mitochondrial dysfunction is implicated in numerous complex diseases.
- Renin-angiotensin system (RAS) upregulation and vitamin D deficiency are also linked to hypertension pathogenesis.
Purpose of the Study:
- To explore the pathophysiological roles of mitochondrial ROS in hypertension and insulin resistance.
- To investigate the interplay between the renin-angiotensin system (RAS), vitamin D, and mitochondrial function in disease.
- To elucidate how mitochondrial RAS and vitamin D receptors influence chronic disease states.
Main Methods:
- Review of existing literature on mitochondrial function, ROS production, and their links to hypertension and insulin resistance.
- Analysis of experimental and clinical evidence regarding the renin-angiotensin system (RAS) and vitamin D levels in hypertension.
- Examination of the presence and function of RAS and vitamin D receptors within mitochondria.
Main Results:
- RAS activation contributes to hypertension and insulin resistance, increasing ROS levels.
- Low vitamin D levels and RAS stimulation are inversely related risk factors in hypertension.
- High ROS levels can induce mitochondrial apoptosis and DNA degradation, increasing diabetes risk.
Conclusions:
- Mitochondria possess a functional renin-angiotensin system (RAS) and vitamin D receptors.
- Understanding these mitochondrial components is crucial for deciphering their role in chronic diseases.
- This knowledge may lead to reduced chronic disease burden from hypertension and diabetes.
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