Suppression of endothelial CD39/ENTPD1 is associated with pulmonary vascular remodeling in pulmonary arterial hypertension
| Autor: | Joonas Aho, Lingli Wang, Pekka Taimen, Sanna Vattulainen, Tero-Pekka Alastalo, Juha Koskenvuo, Vinicio A. de Jesus Perez, Anne Komulainen, Mikko Helenius, Mark Orcholski |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Adult
Male Pulmonary and Respiratory Medicine Pathology medicine.medical_specialty Physiology Hypertension Pulmonary Pulmonary Artery Vascular Remodeling Biology Lung injury Gene Expression Regulation Enzymologic Cell Line Vascular remodelling in the embryo chemistry.chemical_compound Adenosine Triphosphate Antigens CD Physiology (medical) medicine Extracellular Humans Receptor Receptors Purinergic P2 Apyrase Cell Biology Middle Aged Purinergic signalling ta3121 Apelin Endothelial stem cell chemistry Intercellular Signaling Peptides and Proteins Adenosine triphosphate |
| Zdroj: | AJP - Lung Cellular and Molecular Physiology. 308(10):L1046-L1057 |
| ISSN: | 1040-0605 |
| DOI: | 10.1152/ajplung.00340.2014 |
| Popis: | Endothelial cell (EC) dysfunction plays a role in the pathobiology of occlusive vasculopathy in pulmonary arterial hypertension (PAH). Purinergic signaling pathways, which consist of extracellular nucleotide and nucleoside-mediated cell signaling through specific receptors, are known to be important regulators of vascular tone and remodeling. Therefore, we hypothesized that abnormalities in the vascular purinergic microenvironment are associated with PAH. Enzymatic clearance is crucial to terminate unnecessary cell activation; one of the most abundantly expressed enzymes on the EC surface is E-NTPDase1/CD39, which hydrolyzes ATP and ADP to AMP. we used histological samples from patients and healthy donors, radioisotope-labeled substrates to measure ectoenzyme activity, and a variety of in vitro approaches to study the role of CD39 in PAH. Immunohistochemistry on human idiopathic PAH (IPAH) patients' lungs demonstrated that CD39 was significantly downregulated in the endothelium of diseased small arteries. Similarly, CD39 expression and activity were decreased in cultured pulmonary ECs from IPAH patients. Suppression of CD39 in vitro resulted in EC phenotypic switch that gave rise to apoptosis-resistant pulmonary arterial endothelial cells and promoted a microenvironment that induced vascular smooth muscle cell migration. we also identified that the ATP receptor P2Y11 is essential for ATP-mediated EC survival. Furthermore, we report that apelin, a known regulator of pulmonary vascular homeostasis, can potentiate the activity of CD39 both in vitro and in vivo. we conclude that sustained attenuation of CD39 activity through ATP accumulation is tightly linked to vascular dysfunction and remodeling in PAH and could represent a novel target for therapy. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|