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Chiu H, Chau Fang A, Chen YH, Koi RX, Yu KC, Hsieh LH, Shyu YM, Amer TA, Hsueh YJ, Tsao YT, Shen YJ, Wang YM, Chen HC, Lu YJ, Huang CC, Lu TT. Mechanistic and Kinetic Insights into Cellular Uptake of Biomimetic Dinitrosyl Iron Complexes and Intracellular Delivery of NO for Activation of Cytoprotective HO-1. JACS AU 2024; 4:1550-1569. [PMID: 38665642 PMCID: PMC11040670 DOI: 10.1021/jacsau.4c00064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 02/29/2024] [Accepted: 03/19/2024] [Indexed: 04/28/2024]
Abstract
Dinitrosyl iron unit (DNIU), [Fe(NO)2], is a natural metallocofactor for biological storage, delivery, and metabolism of nitric oxide (NO). In the attempt to gain a biomimetic insight into the natural DNIU under biological system, in this study, synthetic dinitrosyl iron complexes (DNICs) [(NO)2Fe(μ-SCH2CH2COOH)2Fe(NO)2] (DNIC-COOH) and [(NO)2Fe(μ-SCH2CH2COOCH3)2Fe(NO)2] (DNIC-COOMe) were employed to investigate the structure-reactivity relationship of mechanism and kinetics for cellular uptake of DNICs, intracellular delivery of NO, and activation of cytoprotective heme oxygenase (HO)-1. After rapid cellular uptake of dinuclear DNIC-COOMe through a thiol-mediated pathway (tmax = 0.5 h), intracellular assembly of mononuclear DNIC [(NO)2Fe(SR)(SCys)]n-/[(NO)2Fe(SR)(SCys-protein)]n- occurred, followed by O2-induced release of free NO (tmax = 1-2 h) or direct transfer of NO to soluble guanylate cyclase, which triggered the downstream HO-1. In contrast, steady kinetics for cellular uptake of DNIC-COOH via endocytosis (tmax = 2-8 h) and for intracellular release of NO (tmax = 4-6 h) reflected on the elevated activation of cytoprotective HO-1 (∼50-150-fold change at t = 3-10 h) and on the improved survival of DNIC-COOH-primed mesenchymal stem cell (MSC)/human corneal endothelial cell (HCEC) under stressed conditions. Consequently, this study unravels the bridging thiolate ligands in dinuclear DNIC-COOH/DNIC-COOMe as a switch to control the mechanism, kinetics, and efficacy for cellular uptake of DNICs, intracellular delivery of NO, and activation of cytoprotective HO-1, which poses an implication on enhanced survival of postengrafted MSC for advancing the MSC-based regenerative medicine.
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Affiliation(s)
- Han Chiu
- Institute
of Biomedical Engineering, National Tsing
Hua University, Hsinchu 30013 Taiwan
| | - Anyelina Chau Fang
- Institute
of Biomedical Engineering, National Tsing
Hua University, Hsinchu 30013 Taiwan
| | - Yi-Hong Chen
- Institute
of Biomedical Engineering, National Tsing
Hua University, Hsinchu 30013 Taiwan
| | - Ru Xin Koi
- Institute
of Biomedical Engineering, National Tsing
Hua University, Hsinchu 30013 Taiwan
| | - Kai-Ching Yu
- Institute
of Biomedical Engineering, National Tsing
Hua University, Hsinchu 30013 Taiwan
| | - Li-Hung Hsieh
- Institute
of Biomedical Engineering, National Tsing
Hua University, Hsinchu 30013 Taiwan
| | - Yueh-Ming Shyu
- Institute
of Biomedical Engineering, National Tsing
Hua University, Hsinchu 30013 Taiwan
| | - Tarik Abdelkareem
Mostafa Amer
- Department
of Biological Science and Technology, Institute of Molecular Medicine
and Bioengineering, College of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
| | - Yi-Jen Hsueh
- Department
of Ophthalmology and Center for Tissue Engineering, Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan
| | - Yu-Ting Tsao
- Department
of Ophthalmology and Center for Tissue Engineering, Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan
| | - Yang-Jin Shen
- College
of Medicine, Chang Gung University, Kwei-San, Taoyuan 33302, Taiwan
- Department
of Neurosurgery, Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan
| | - Yun-Ming Wang
- Department
of Biological Science and Technology, Institute of Molecular Medicine
and Bioengineering, College of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
| | - Hung-Chi Chen
- Department
of Ophthalmology and Center for Tissue Engineering, Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan
- College
of Medicine, Chang Gung University, Kwei-San, Taoyuan 33302, Taiwan
| | - Yu-Jen Lu
- College
of Medicine, Chang Gung University, Kwei-San, Taoyuan 33302, Taiwan
- Department
of Neurosurgery, Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan
| | - Chieh-Cheng Huang
- Institute
of Biomedical Engineering, National Tsing
Hua University, Hsinchu 30013 Taiwan
| | - Tsai-Te Lu
- Institute
of Biomedical Engineering, National Tsing
Hua University, Hsinchu 30013 Taiwan
- Department
of Chemistry, National Tsing Hua University, Hsinchu 30013 Taiwan
- Department
of Chemistry, Chung Yuan Christian University, Taoyuan 32023, Taiwan
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Varying Oxygen Partial Pressure Elicits Blood-Borne Microparticles Expressing Different Cell-Specific Proteins-Toward a Targeted Use of Oxygen? Int J Mol Sci 2022; 23:ijms23147888. [PMID: 35887238 PMCID: PMC9322965 DOI: 10.3390/ijms23147888] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 07/14/2022] [Accepted: 07/16/2022] [Indexed: 02/06/2023] Open
Abstract
Oxygen is a powerful trigger for cellular reactions, but there are few comparative investigations assessing the effects over a large range of partial pressures. We investigated a metabolic response to single exposures to either normobaric (10%, 15%, 30%, 100%) or hyperbaric (1.4 ATA, 2.5 ATA) oxygen. Forty-eight healthy subjects (32 males/16 females; age: 43.7 ± 13.4 years, height: 172.7 ± 10.07 cm; weight 68.4 ± 15.7 kg) were randomly assigned, and blood samples were taken before and 2 h after each exposure. Microparticles (MPs) expressing proteins specific to different cells were analyzed, including platelets (CD41), neutrophils (CD66b), endothelial cells (CD146), and microglia (TMEM). Phalloidin binding and thrombospondin-1 (TSP), which are related to neutrophil and platelet activation, respectively, were also analyzed. The responses were found to be different and sometimes opposite. Significant elevations were identified for MPs expressing CD41, CD66b, TMEM, and phalloidin binding in all conditions but for 1.4 ATA, which elicited significant decreases. Few changes were found for CD146 and TSP. Regarding OPB, further investigation is needed to fully understand the future applications of such findings.
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Caldwell HG, Hoiland RL, Barak OF, Mijacika T, Burma JS, Dujić Ž, Ainslie PN. Alterations in resting cerebrovascular regulation do not affect reactivity to hypoxia, hyperoxia or neurovascular coupling following a SCUBA dive. Exp Physiol 2020; 105:1540-1549. [PMID: 32618374 DOI: 10.1113/ep088746] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 06/29/2020] [Indexed: 12/12/2022]
Abstract
NEW FINDINGS What is the central question of this study? What are the characteristics of cerebral blood flow (CBF) regulation following a single SCUBA dive to a depth of 18 m sea water with a 47 min bottom time. What is the main finding and its importance? Acute alterations in CBF regulation at rest, including extra-cranial vasodilatation, reductions in shear patterns and elevations in intra-cranial blood velocity were observed at rest following a single SCUBA dive. These subtle changes in CBF regulation did not translate into any functional changes in cerebrovascular reactivity to hypoxia or hyperoxia, or neurovascular coupling following a single SCUBA dive. ABSTRACT Reductions in vascular function during a SCUBA dive - due to hyperoxia-induced oxidative stress, arterial and venous gas emboli and altered endothelial integrity - may also extend to the cerebrovasculature following return to the surface. This study aimed to characterize cerebral blood flow (CBF) regulation following a single SCUBA dive to a depth of 18 m sea water with a 47 min bottom time. Prior to and following the dive, participants (n = 11) completed (1) resting CBF in the internal carotid (ICA) and vertebral (VA) arteries (duplex ultrasound) and intra-cranial blood velocity (v) of the middle and posterior cerebral arteries (MCAv and PCAv, respectively) (transcranial Doppler ultrasound); (2) cerebrovascular reactivity to acute poikilocapnic hypoxia (i.e. F I O 2 , 0.10) and hyperoxia (i.e. F I O 2 , 1.0); and (3) neurovascular coupling (NVC; regional CBF response to local increases in cerebral metabolism). Global CBF, cerebrovascular reactivity to hypoxia and hyperoxia, and NVC were unaltered following a SCUBA dive (all P > 0.05); however, there were subtle changes in other cerebrovascular metrics post-dive, including reductions in ICA (-13 ± 8%, P = 0.003) and VA (-11 ± 14%, P = 0.021) shear rate, lower ICAv (-10 ± 9%, P = 0.008) and VAv (-9 ± 14%, P = 0.028), increases in ICA diameter (+4 ± 5%, P = 0.017) and elevations in PCAv (+10 ± 19%, P = 0.047). Although we observed subtle alterations in CBF regulation at rest, these changes did not translate into any functional changes in cerebrovascular reactivity to hypoxia or hyperoxia, or NVC. Whether prolonged exposure to hyperoxia and hyperbaria during longer, deeper, colder and/or repetitive SCUBA dives would provoke changes to the cerebrovasculature requires further investigation.
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Affiliation(s)
- Hannah G Caldwell
- Centre for Heart, Lung and Vascular Health, School of Health and Exercise Sciences, University of British Columbia, Okanagan, Kelowna, Canada
| | - Ryan L Hoiland
- Centre for Heart, Lung and Vascular Health, School of Health and Exercise Sciences, University of British Columbia, Okanagan, Kelowna, Canada
| | - Otto F Barak
- Department of Physiology, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia.,Faculty of Sports and Physical Education, University of Novi Sad, Novi Sad, Serbia
| | - Tanja Mijacika
- Department of Integrative Physiology, University of Split School of Medicine, Split, Croatia
| | - Joel S Burma
- Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Calgary, Canada
| | - Željko Dujić
- Department of Integrative Physiology, University of Split School of Medicine, Split, Croatia
| | - Philip N Ainslie
- Centre for Heart, Lung and Vascular Health, School of Health and Exercise Sciences, University of British Columbia, Okanagan, Kelowna, Canada
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