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Iarovaia OV, Ulianov SV, Ioudinkova ES, Razin SV. Segregation of α- and β-Globin Gene Cluster in Vertebrate Evolution: Chance or Necessity? BIOCHEMISTRY. BIOKHIMIIA 2022; 87:1035-1049. [PMID: 36180994 DOI: 10.1134/s0006297922090140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/18/2022] [Accepted: 08/19/2022] [Indexed: 06/16/2023]
Abstract
The review is devoted to the patterns of evolution of α- and β-globin gene domains. A hypothesis is presented according to which segregation of the ancestral cluster of α/β-globin genes in Amniota occurred due to the performance by α-globins and β-globins of non-canonical functions not related to oxygen transport.
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Affiliation(s)
- Olga V Iarovaia
- Institute of Gene Biology, Russian Academy of Sciences, Moscow, 119334, Russia.
| | - Sergey V Ulianov
- Institute of Gene Biology, Russian Academy of Sciences, Moscow, 119334, Russia
- Faculty of Biology, Lomonosov Moscow State University, Moscow, 119234, Russia
| | - Elena S Ioudinkova
- Institute of Gene Biology, Russian Academy of Sciences, Moscow, 119334, Russia
| | - Sergey V Razin
- Institute of Gene Biology, Russian Academy of Sciences, Moscow, 119334, Russia
- Faculty of Biology, Lomonosov Moscow State University, Moscow, 119234, Russia
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Pogoda K, Kameritsch P. Molecular regulation of myoendothelial gap junctions. Curr Opin Pharmacol 2019; 45:16-22. [DOI: 10.1016/j.coph.2019.03.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 02/14/2019] [Accepted: 03/15/2019] [Indexed: 11/16/2022]
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Lechauve C, Butcher JT, Freiwan A, Biwer LA, Keith JM, Good ME, Ackerman H, Tillman HS, Kiger L, Isakson BE, Weiss MJ. Endothelial cell α-globin and its molecular chaperone α-hemoglobin-stabilizing protein regulate arteriolar contractility. J Clin Invest 2018; 128:5073-5082. [PMID: 30295646 DOI: 10.1172/jci99933] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 08/21/2018] [Indexed: 12/18/2022] Open
Abstract
Arteriolar endothelial cell-expressed (EC-expressed) α-globin binds endothelial NOS (eNOS) and degrades its enzymatic product, NO, via dioxygenation, thereby lessening the vasodilatory effects of NO on nearby vascular smooth muscle. Although this reaction potentially affects vascular physiology, the mechanisms that regulate α-globin expression and dioxygenase activity in ECs are unknown. Without β-globin, α-globin is unstable and cytotoxic, particularly in its oxidized form, which is generated by dioxygenation and recycled via endogenous reductases. We show that the molecular chaperone α-hemoglobin-stabilizing protein (AHSP) promotes arteriolar α-globin expression in vivo and facilitates its reduction by eNOS. In Ahsp-/- mice, EC α-globin was decreased by 70%. Ahsp-/- and Hba1-/- mice exhibited similar evidence of increased vascular NO signaling, including arteriolar dilation, blunted α1-adrenergic vasoconstriction, and reduced blood pressure. Purified α-globin bound eNOS or AHSP, but not both together. In ECs in culture, eNOS or AHSP enhanced α-globin expression posttranscriptionally. However, only AHSP prevented oxidized α-globin precipitation in solution. Finally, eNOS reduced AHSP-bound α-globin approximately 6-fold faster than did the major erythrocyte hemoglobin reductases (cytochrome B5 reductase plus cytochrome B5). Our data support a model whereby redox-sensitive shuttling of EC α-globin between AHSP and eNOS regulates EC NO degradation and vascular tone.
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Affiliation(s)
- Christophe Lechauve
- Department of Hematology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Joshua T Butcher
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Abdullah Freiwan
- Department of Hematology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Lauren A Biwer
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Julia M Keith
- Department of Hematology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Miranda E Good
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Hans Ackerman
- Laboratory of Malaria and Vector Research, National Institutes of Allergy and Infectious Diseases, Rockville, Maryland, USA
| | - Heather S Tillman
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | | | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Mitchell J Weiss
- Department of Hematology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
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