1
|
Atasoy R, Hernandez I, Chissey A, Poinsignon L, Fournier T, Ferecatu I, Beaudeux JL, Zerrad-Saadi A. Involvement of the NADPH oxidase in pathophysiology of preeclampsia. Placenta 2021. [DOI: 10.1016/j.placenta.2021.07.178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
2
|
Hernandez I, Chissey A, Guibourdenche J, Atasoy R, Coumoul X, Fournier T, Beaudeux JL, Zerrad-Saadi A. Human Placental NADPH Oxidase Mediates sFlt-1 and PlGF Secretion in Early Pregnancy: Exploration of the TGF-β1/p38 MAPK Pathways. Antioxidants (Basel) 2021; 10:antiox10020281. [PMID: 33673360 PMCID: PMC7918586 DOI: 10.3390/antiox10020281] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 02/05/2021] [Accepted: 02/08/2021] [Indexed: 12/18/2022] Open
Abstract
Preeclampsia, a hypertensive disorder occurring during pregnancy, is characterized by excessive oxidative stress and trophoblast dysfunction with dysregulation of soluble Fms-like tyrosine kinase 1 (sFlt-1) and placental growth factor (PlGF) production. Nicotinamide Adenine Dinucleotide Phosphate (NADPH) oxidase (Nox) is the major source of placental superoxide in early pregnancy and its activation with the subsequent formation of superoxide has been demonstrated for various agents including Transforming Growth Factor beta-1 (TGF-β1), a well-known p38 MAPK pathway activator. However, the bridge between Nox and sFlt-1 remains unknown. The purpose of this study was to explore the possible signaling pathway of TGF-β1/Nox/p38 induced sFlt-1 production in human chorionic villi (CV). Methods: Human chorionic villi from first trimester placenta (7–9 Gestational Weeks (GW)) were treated with TGF-β1 or preincubated with p38 inhibitor, SB203580. For NADPH oxidase inhibition, CV were treated with diphenyleneiodonium (DPI). The protein levels of phospho-p38, p38, phospho-Mothers Against Decapentaplegic homolog 2 (SMAD2), and SMAD2 were detected by Western blot. The secretion of sFlt-1 and PlGF by chorionic villi were measured with Electrochemiluminescence Immunologic Assays, and NADPH oxidase activity was monitored by lucigenin method. Results: We demonstrate for the first time that NADPH oxidase is involved in sFlt-1 and PlGF secretion in first trimester chorionic villi. Indeed, the inhibition of Nox by DPI decreases sFlt-1, and increases PlGF secretions. We also demonstrate the involvement of p38 MAPK in sFlt-1 secretion and Nox activation as blocking the p38 MAPK phosphorylation decreases both sFlt-1 secretion and superoxide production. Nevertheless, TGF-β1-mediated p38 activation do not seem to be involved in regulation of the first trimester placental angiogenic balance and no crosstalk was found between SMAD2 and p38 MAPK pathways. Conclusions: Thus, the placental NADPH oxidase play a major role in mediating the signal transduction cascade of sFlt-1 production. Furthermore, we highlight for the first time the involvement of p38 activation in first trimester placental Nox activity.
Collapse
Affiliation(s)
- Isabelle Hernandez
- Université de Paris, INSERM UMR-S 1139, 3PHM, F-75006 Paris, France; (A.C.); (J.G.); (R.A.); (T.F.); (J.-L.B.)
- Correspondence: (I.H.); (A.Z.-S.); Tel.: +33-1-53-73-96-03 (A.Z.-S.)
| | - Audrey Chissey
- Université de Paris, INSERM UMR-S 1139, 3PHM, F-75006 Paris, France; (A.C.); (J.G.); (R.A.); (T.F.); (J.-L.B.)
| | - Jean Guibourdenche
- Université de Paris, INSERM UMR-S 1139, 3PHM, F-75006 Paris, France; (A.C.); (J.G.); (R.A.); (T.F.); (J.-L.B.)
- UF d’hormonologie Adulte de Cochin AP-HP, Hôpitaux Universitaires, F-75006 Paris, France
| | - Roger Atasoy
- Université de Paris, INSERM UMR-S 1139, 3PHM, F-75006 Paris, France; (A.C.); (J.G.); (R.A.); (T.F.); (J.-L.B.)
| | - Xavier Coumoul
- Université de Paris, INSERM UMR-S 1124, F-75006 Paris, France;
| | - Thierry Fournier
- Université de Paris, INSERM UMR-S 1139, 3PHM, F-75006 Paris, France; (A.C.); (J.G.); (R.A.); (T.F.); (J.-L.B.)
| | - Jean-Louis Beaudeux
- Université de Paris, INSERM UMR-S 1139, 3PHM, F-75006 Paris, France; (A.C.); (J.G.); (R.A.); (T.F.); (J.-L.B.)
| | - Amal Zerrad-Saadi
- Université de Paris, INSERM UMR-S 1139, 3PHM, F-75006 Paris, France; (A.C.); (J.G.); (R.A.); (T.F.); (J.-L.B.)
- Correspondence: (I.H.); (A.Z.-S.); Tel.: +33-1-53-73-96-03 (A.Z.-S.)
| |
Collapse
|
3
|
Abstract
Dermatofibrosarcoma protuberans is a slow-growing tumour with propensity for local recurrence. We report herein a case of a 36-year-old man, who presented with a huge, recurrent tumour arising from the left upper anterior part of his chest wall. We performed a wide excision with 4 cm free skin margins. Reconstruction was performed with a pedicled latissimus dorsi musculocutaneous flap and free split skin grafts. Histologic and immunohistochemical studies revealed the lesion to be dermatofibrosarcoma protuberans.
Collapse
Affiliation(s)
- M Kara
- Department of Thoracic Surgery, University of Kirikkale, School of Medicine, 71100, Kirikkale, Ankara, Turkey.
| | | | | | | |
Collapse
|
4
|
Gallo LL, Atasoy R, Vahouny GV, Treadwell CR. Enzymatic assay for cholesterol ester hydrolase activity. J Lipid Res 1978; 19:913-6. [PMID: 712250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
A rapid and accurate method is described for the assay of cholesterol ester hydrolase (CEH) activity. Aliquots of the enzyme-substrate incubation mixture are extracted into isopropanol. The free cholesterol concentration in each extract is determined enzymatically using a single aqueous reagent containing cholesterol oxidase and peroxidase. The free cholesterol remaining after the cholesterol ester hydrolase-catalyzed esterification is converted to delta 4-cholestenone and hydrogen peroxide (H2O2); peroxidase couples H2O2 with phenol and 4-amino-antipyrine to yield a stable rose-colored product absorbing at 500 nm. The method is highly reproducible and the values correlate well with those obtained with the chromatographic radioassay of CEH activity.
Collapse
|
5
|
|