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Bai J, Li Y, Yan G, Zhou J, Salmeron AG, Fategbe OT, Kumar S, Chen X, Chen DB. ICI 182,780 Attenuates Selective Upregulation of Uterine Artery Cystathionine β-Synthase Expression in Rat Pregnancy. Int J Mol Sci 2023; 24:14384. [PMID: 37762687 PMCID: PMC10532247 DOI: 10.3390/ijms241814384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/16/2023] [Accepted: 09/17/2023] [Indexed: 09/29/2023] Open
Abstract
Endogenous hydrogen sulfide (H2S) produced by cystathionine β-synthase (CBS) and cystathionine-γ lyase (CSE) has emerged as a novel uterine vasodilator contributing to pregnancy-associated increases in uterine blood flow, which safeguard pregnancy health. Uterine artery (UA) H2S production is stimulated via exogenous estrogen replacement and is associated with elevated endogenous estrogens during pregnancy through the selective upregulation of CBS without altering CSE. However, how endogenous estrogens regulate uterine artery CBS expression in pregnancy is unknown. This study was conducted to test a hypothesis that endogenous estrogens selectively stimulate UA CBS expression via specific estrogen receptors (ER). Treatment with E2β (0.01 to 100 nM) stimulated CBS but not CSE mRNA in organ cultures of fresh UA rings from both NP and P (gestational day 20, GD20) rats, with greater responses to all doses of E2β tested in P vs. NP UA. ER antagonist ICI 182,780 (ICI, 1 µM) completely attenuated E2β-stimulated CBS mRNA in both NP and P rat UA. Subcutaneous injection with ICI 182,780 (0.3 mg/rat) of GD19 P rats for 24 h significantly inhibited UA CBS but not mRNA expression, consistent with reduced endothelial and smooth muscle cell CBS (but not CSE) protein. ICI did not alter mesenteric and renal artery CBS and CSE mRNA. In addition, ICI decreased endothelial nitric oxide synthase mRNA in UA but not in mesenteric or renal arteries. Thus, pregnancy-augmented UA CBS/H2S production is mediated by the actions of endogenous estrogens via specific ER in pregnant rats.
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Affiliation(s)
- Jin Bai
- Department of Obstetrics and Gynecology, University of California Irvine, Irvine, CA 92697, USA; (J.B.); (A.G.S.); (O.T.F.)
| | - Yao Li
- Department of Laboratory Animal Sciences, School of Medicine, Shanghai Jiaotong University, 280 South Chongqing Road, Shanghai 200025, China; (Y.L.); (G.Y.); (J.Z.); (X.C.)
| | - Guofeng Yan
- Department of Laboratory Animal Sciences, School of Medicine, Shanghai Jiaotong University, 280 South Chongqing Road, Shanghai 200025, China; (Y.L.); (G.Y.); (J.Z.); (X.C.)
| | - Jing Zhou
- Department of Laboratory Animal Sciences, School of Medicine, Shanghai Jiaotong University, 280 South Chongqing Road, Shanghai 200025, China; (Y.L.); (G.Y.); (J.Z.); (X.C.)
| | - Alejandra Garcia Salmeron
- Department of Obstetrics and Gynecology, University of California Irvine, Irvine, CA 92697, USA; (J.B.); (A.G.S.); (O.T.F.)
| | - Olamide Tolulope Fategbe
- Department of Obstetrics and Gynecology, University of California Irvine, Irvine, CA 92697, USA; (J.B.); (A.G.S.); (O.T.F.)
| | - Sathish Kumar
- Department of Comparative Biosciences, University of Wisconsin-Madison, Madison, WI 53706, USA;
| | - Xuejin Chen
- Department of Laboratory Animal Sciences, School of Medicine, Shanghai Jiaotong University, 280 South Chongqing Road, Shanghai 200025, China; (Y.L.); (G.Y.); (J.Z.); (X.C.)
| | - Dong-Bao Chen
- Department of Obstetrics and Gynecology, University of California Irvine, Irvine, CA 92697, USA; (J.B.); (A.G.S.); (O.T.F.)
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Bai J, Jiao F, Salmeron AG, Xu S, Xian M, Huang L, Chen DB. Mapping Pregnancy-dependent Sulfhydrome Unfolds Diverse Functions of Protein Sulfhydration in Human Uterine Artery. Endocrinology 2023; 164:bqad107. [PMID: 37439247 PMCID: PMC10413431 DOI: 10.1210/endocr/bqad107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 06/26/2023] [Accepted: 07/11/2023] [Indexed: 07/14/2023]
Abstract
Uterine artery (UA) hydrogen sulfide (H2S) production is augmented in pregnancy and, on stimulation by systemic/local vasodilators, contributes to pregnancy-dependent uterine vasodilation; however, how H2S exploits this role is largely unknown. S-sulfhydration converts free thiols to persulfides at reactive cysteine(s) on targeted proteins to affect the entire proteome posttranslationally, representing the main route for H2S to elicit its function. Here, we used Tag-Switch to quantify changes in sulfhydrated (SSH-) proteins (ie, sulfhydrome) in H2S-treated nonpregnant and pregnant human UA. We further used the low-pH quantitative thiol reactivity profiling platform by which paired sulfhydromes were subjected to liquid chromatography tandem mass spectrometry-based peptide sequencing to generate site (cysteine)-specific pregnancy-dependent H2S-responsive human UA sulfhydrome. Total levels of sulfhydrated proteins were significantly greater in pregnant vs nonpregnant human UA and further stimulated by treatment with sodium hydrosulfide. We identified a total of 360 and 1671 SSH-peptides from 480 and 1186 SSH-proteins in untreated and sodium hydrosulfide-treated human UA, respectively. Bioinformatics analyses identified pregnancy-dependent H2S-responsive human UA SSH peptides/proteins, which were categorized to various molecular functions, pathways, and biological processes, especially vascular smooth muscle contraction/relaxation. Pregnancy-dependent changes in these proteins were rectified by immunoblotting of the Tag-Switch labeled SSH proteins. Low-pH quantitative thiol reactivity profiling failed to identify low abundance SSH proteins such as KATP channels in human UA; however, immunoblotting of Tag-Switch-labeled SSH proteins identified pregnancy-dependent upregulation of SSH-KATP channels without altering their total proteins. Thus, comprehensive analyses of human UA sulfhydromes influenced by endogenous and exogenous H2S inform novel roles of protein sulfhydration in uterine hemodynamics regulation.
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Affiliation(s)
- Jin Bai
- Department of Obstetrics and Gynecology, University of California, Irvine, CA 92697, USA
| | - Fenglong Jiao
- Department of Physiology and Biophysics, University of California, Irvine, CA 92697, USA
| | | | - Shi Xu
- Department of Chemistry, Brown University, Providence, RI 02912, USA
| | - Ming Xian
- Department of Chemistry, Brown University, Providence, RI 02912, USA
| | - Lan Huang
- Department of Physiology and Biophysics, University of California, Irvine, CA 92697, USA
| | - Dong-bao Chen
- Department of Obstetrics and Gynecology, University of California, Irvine, CA 92697, USA
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