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Zhao W, Pan L, Stalin A, Xu J, Wu L, Ke X, Chen Y. Inhibitory Effects of 2-Aminoethoxydiphenyl Borate (2-APB) on Three K V1 Channel Currents. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020871. [PMID: 36677928 PMCID: PMC9865587 DOI: 10.3390/molecules28020871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/11/2023] [Accepted: 01/12/2023] [Indexed: 01/18/2023]
Abstract
2-Aminoethoxydiphenyl borate (2-APB), a boron-containing compound, is a multitarget compound with potential as a drug precursor and exerts various effects in systems of the human body. Ion channels are among the reported targets of 2-APB. The effects of 2-APB on voltage-gated potassium channels (KV) have been reported, but the types of KV channels that 2-APB inhibits and the inhibitory mechanism remain unknown. In this paper, we discovered that 2-APB acted as an inhibitor of three representative human KV1 channels. 2-APB significantly blocked A-type Kv channel KV1.4 in a concentration-dependent manner, with an IC50 of 67.3 μM, while it inhibited the delayed outward rectifier channels KV1.2 and KV1.3, with IC50s of 310.4 μM and 454.9 μM, respectively. Further studies on KV1.4 showed that V549, T551, A553, and L554 at the cavity region and N-terminal played significant roles in 2-APB's effects on the KV1.4 channel. The results also indicated the importance of fast inactivation gating in determining the different effects of 2-APB on three channels. Interestingly, a current facilitation phenomenon by a short prepulse after 2-APB application was discovered for the first time. The docked modeling revealed that 2-APB could form hydrogen bonds with different sites in the cavity region of three channels, and the inhibition constants showed a similar trend to the experimental results. These findings revealed new molecular targets of 2-APB and demonstrated that 2-APB's effects on KV1 channels might be part of the reason for the diverse bioactivities of 2-APB in the human body and in animal models of human disease.
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Affiliation(s)
- Wei Zhao
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China
- The State Key Laboratory of Subtropical Silviculture, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China
| | - Lanying Pan
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China
- The State Key Laboratory of Subtropical Silviculture, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China
| | - Antony Stalin
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Jianwei Xu
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China
- The State Key Laboratory of Subtropical Silviculture, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China
| | - Liren Wu
- Zhejiang Key Laboratory for Laboratory Animal and Safety Research, Hangzhou Medical College, Hangzhou 311300, China
| | - Xianfu Ke
- Zhejiang Key Laboratory for Laboratory Animal and Safety Research, Hangzhou Medical College, Hangzhou 311300, China
- Correspondence: (X.K.); (Y.C.)
| | - Yuan Chen
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China
- The State Key Laboratory of Subtropical Silviculture, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China
- Correspondence: (X.K.); (Y.C.)
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Qin W, Feng J, Ma R, Jiang Y, Lv H. The effects of dantrolene and 2-aminoethoxydiphenyl borate (2-APB) on arsenic-induced osteoporosis. Mol Cell Toxicol 2022. [DOI: 10.1007/s13273-022-00294-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Qin W, Feng J, Tian R, Wang Z, Zhai Z, Lu G, Dong S, Huang L. 2-Aminoethoxydiphenyl-borate reduces arsenic-induced cardiotoxicity in rats. Acta Biochim Biophys Sin (Shanghai) 2022; 55:162-164. [PMID: 36148949 PMCID: PMC10157538 DOI: 10.3724/abbs.2022134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Baskin V, Eroglu E, Harmanci N, Erol K. Antinociceptive, anxiolytic, and depression‐like effects of hydrogen sulfide, nitric oxide, and carbon monoxide in rats and the role of opioidergic and serotonergic systems in antinociceptive activity. Fundam Clin Pharmacol 2022; 36:674-686. [DOI: 10.1111/fcp.12763] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 01/13/2022] [Accepted: 01/25/2022] [Indexed: 01/02/2023]
Affiliation(s)
- Veysel Baskin
- Faculty of Medicine, Department of Medical Pharmacology Eskişehir Osmangazi University Eskisehir Turkey
- Faculty of Medicine, Department of Medical Pharmacology Hitit University Corum Turkey
| | - Ezgi Eroglu
- Faculty of Medicine, Department of Medical Pharmacology Eskişehir Osmangazi University Eskisehir Turkey
- Faculty of Pharmacy, Department of Pharmacology Lokman Hekim University Ankara Turkey
| | - Nusin Harmanci
- Faculty of Medicine, Department of Medical Pharmacology Eskişehir Osmangazi University Eskisehir Turkey
| | - Kevser Erol
- Faculty of Medicine, Department of Medical Pharmacology Eskişehir Osmangazi University Eskisehir Turkey
- Faculty of Medicine, Department of Medical Pharmacology Bahçeşehir University Istanbul Turkey
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Fernández-Serra R, Martínez-Alonso E, Alcázar A, Chioua M, Marco-Contelles J, Martínez-Murillo R, Ramos M, Guinea GV, González-Nieto D. Postischemic Neuroprotection of Aminoethoxydiphenyl Borate Associates Shortening of Peri-Infarct Depolarizations. Int J Mol Sci 2022; 23:ijms23137449. [PMID: 35806455 PMCID: PMC9266990 DOI: 10.3390/ijms23137449] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 06/29/2022] [Accepted: 07/03/2022] [Indexed: 11/28/2022] Open
Abstract
Brain stroke is a highly prevalent pathology and a main cause of disability among older adults. If not promptly treated with recanalization therapies, primary and secondary mechanisms of injury contribute to an increase in the lesion, enhancing neurological deficits. Targeting excitotoxicity and oxidative stress are very promising approaches, but only a few compounds have reached the clinic with relatively good positive outcomes. The exploration of novel targets might overcome the lack of clinical translation of previous efficient preclinical neuroprotective treatments. In this study, we examined the neuroprotective properties of 2-aminoethoxydiphenyl borate (2-APB), a molecule that interferes with intracellular calcium dynamics by the antagonization of several channels and receptors. In a permanent model of cerebral ischemia, we showed that 2-APB reduces the extent of the damage and preserves the functionality of the cortical territory, as evaluated by somatosensory evoked potentials (SSEPs). While in this permanent ischemia model, the neuroprotective effect exerted by the antioxidant scavenger cholesteronitrone F2 was associated with a reduction in reactive oxygen species (ROS) and better neuronal survival in the penumbra, 2-APB did not modify the inflammatory response or decrease the content of ROS and was mostly associated with a shortening of peri-infarct depolarizations, which translated into better cerebral blood perfusion in the penumbra. Our study highlights the potential of 2-APB to target spreading depolarization events and their associated inverse hemodynamic changes, which mainly contribute to extension of the area of lesion in cerebrovascular pathologies.
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Affiliation(s)
- Rocío Fernández-Serra
- Center for Biomedical Technology, Universidad Politécnica de Madrid, 28223 Madrid, Spain; (R.F.-S.); (M.R.); (G.V.G.)
- Departamento de Tecnología Fotónica y Bioingeniería, ETSI Telecomunicaciones, Universidad Politécnica de Madrid, 28040 Madrid, Spain
- Departamento de Ciencia de Materiales, ETSI Caminos, Canales y Puertos, Universidad Politécnica de Madrid, 28040 Madrid, Spain
- Silk Biomed SL, 28260 Madrid, Spain
| | - Emma Martínez-Alonso
- Department of Research, Hospital Universitario Ramón y Cajal, IRYCIS, 28034 Madrid, Spain; (E.M.-A.); (A.A.)
| | - Alberto Alcázar
- Department of Research, Hospital Universitario Ramón y Cajal, IRYCIS, 28034 Madrid, Spain; (E.M.-A.); (A.A.)
| | - Mourad Chioua
- Laboratory of Medicinal Chemistry, Institute of General Organic Chemistry (CSIC), 28006 Madrid, Spain; (M.C.); (J.M.-C.)
| | - José Marco-Contelles
- Laboratory of Medicinal Chemistry, Institute of General Organic Chemistry (CSIC), 28006 Madrid, Spain; (M.C.); (J.M.-C.)
| | | | - Milagros Ramos
- Center for Biomedical Technology, Universidad Politécnica de Madrid, 28223 Madrid, Spain; (R.F.-S.); (M.R.); (G.V.G.)
- Departamento de Tecnología Fotónica y Bioingeniería, ETSI Telecomunicaciones, Universidad Politécnica de Madrid, 28040 Madrid, Spain
- Biomedical Research Networking Center in Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), 28029 Madrid, Spain
| | - Gustavo V. Guinea
- Center for Biomedical Technology, Universidad Politécnica de Madrid, 28223 Madrid, Spain; (R.F.-S.); (M.R.); (G.V.G.)
- Departamento de Ciencia de Materiales, ETSI Caminos, Canales y Puertos, Universidad Politécnica de Madrid, 28040 Madrid, Spain
- Silk Biomed SL, 28260 Madrid, Spain
- Biomedical Research Networking Center in Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), 28029 Madrid, Spain
- Biomaterials and Regenerative Medicine Group, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), 28040 Madrid, Spain
| | - Daniel González-Nieto
- Center for Biomedical Technology, Universidad Politécnica de Madrid, 28223 Madrid, Spain; (R.F.-S.); (M.R.); (G.V.G.)
- Departamento de Tecnología Fotónica y Bioingeniería, ETSI Telecomunicaciones, Universidad Politécnica de Madrid, 28040 Madrid, Spain
- Silk Biomed SL, 28260 Madrid, Spain
- Biomedical Research Networking Center in Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), 28029 Madrid, Spain
- Correspondence: ; Tel.: +34-910679280
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