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Ozen G, Amgoud Y, Abdelazeem H, Mani S, Benyahia C, Bouhadoun A, Tran-Dinh A, Castier Y, Guyard A, Longrois D, Silverstein AM, Norel X. Downregulation of PGI 2 pathway in Pulmonary Hypertension Group-III patients. Prostaglandins Leukot Essent Fatty Acids 2020; 160:102158. [PMID: 32673988 DOI: 10.1016/j.plefa.2020.102158] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 06/27/2020] [Accepted: 07/02/2020] [Indexed: 12/18/2022]
Abstract
Pulmonary hypertension (PH) is a progressive and life-threating lung disorder characterized by elevated pulmonary artery pressure and vascular remodeling. PH is classified into five groups, and one of the most common and lethal forms, PH Group-III is defined as PH due to lung diseases and/or hypoxia. Due to the lack of studies in this group, PH-specific drug therapies including prostacyclin (PGI2) analogues have not been approved or recommended for use in these patients. PGI2 is synthesized by the PGI2 synthase (PGIS) enzyme, and its production is determined by measuring its stable metabolite, 6-keto-PGF1α. An impaired PGI2 pathway has been observed in PH animal models and in PH Group-I patients; however, there are contradictory results. The aim of this study is to determine whether PH Group-III is associated with altered expression of PGIS and production of PGI2 in humans. To explore this hypothesis, we measured PGIS expression (by western blot) and PGI2 production (by ELISA) in a large variety of preparations from the pulmonary circulation including human pulmonary artery, pulmonary vein, distal lung tissue, pulmonary artery smooth muscle cells (hPASMC), and bronchi in PH Group-III (n = 35) and control patients (n = 32). Our results showed decreased PGIS expression and/or 6-keto-PGF1α levels in human pulmonary artery, hPASMC, and distal lung tissue derived from PH Group-III patients. Moreover, the production of 6-keto-PGF1α from hPASMC positively correlated with PGIS expression and was inversely correlated with mean pulmonary artery pressure. On the other hand, PH Group-III pulmonary veins and bronchi did not show altered PGI2 production compared to controls. The deficit in PGIS expression and/or PGI2 production observed in pulmonary artery and distal lung tissue in PH Group-III patients may have important implications in the pathogenesis and treatment of PH Group-III.
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Affiliation(s)
- Gulsev Ozen
- Université de Paris, INSERM, UMR-S 1148, CHU X. Bichat, 75018 Paris, France; Istanbul University, Faculty of Pharmacy, Department of Pharmacology, 34116 Istanbul, Turkey
| | - Yasmine Amgoud
- Université de Paris, INSERM, UMR-S 1148, CHU X. Bichat, 75018 Paris, France; Université Sorbonne Paris Nord, 93430 Villetaneuse, France
| | - Heba Abdelazeem
- Université de Paris, INSERM, UMR-S 1148, CHU X. Bichat, 75018 Paris, France; Université Sorbonne Paris Nord, 93430 Villetaneuse, France; Alexandria University, Faculty of Pharmacy, Department of Pharmacology and Toxicology, Alexandria, Egypt
| | - Salma Mani
- Université de Paris, INSERM, UMR-S 1148, CHU X. Bichat, 75018 Paris, France; Université Sorbonne Paris Nord, 93430 Villetaneuse, France; Université de Monastir-Tunisia, Institut Supérieur de Biotechnologie de Monastir (ISBM), Tunisia
| | - Chabha Benyahia
- Université de Paris, INSERM, UMR-S 1148, CHU X. Bichat, 75018 Paris, France; Université Sorbonne Paris Nord, 93430 Villetaneuse, France
| | - Amel Bouhadoun
- Université de Paris, INSERM, UMR-S 1148, CHU X. Bichat, 75018 Paris, France; Université Sorbonne Paris Nord, 93430 Villetaneuse, France
| | - Alexy Tran-Dinh
- Université de Paris, INSERM, UMR-S 1148, CHU X. Bichat, 75018 Paris, France; Hôpital Bichat-Claude Bernard, AP-HP, Paris Diderot University, USPC, 75018 Paris, France
| | - Yves Castier
- Hôpital Bichat-Claude Bernard, AP-HP, Paris Diderot University, USPC, 75018 Paris, France
| | - Alice Guyard
- Hôpital Bichat-Claude Bernard, AP-HP, Paris Diderot University, USPC, 75018 Paris, France
| | - Dan Longrois
- Université de Paris, INSERM, UMR-S 1148, CHU X. Bichat, 75018 Paris, France; Hôpital Bichat-Claude Bernard, AP-HP, Paris Diderot University, USPC, 75018 Paris, France
| | | | - Xavier Norel
- Université de Paris, INSERM, UMR-S 1148, CHU X. Bichat, 75018 Paris, France; Université Sorbonne Paris Nord, 93430 Villetaneuse, France.
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