1
|
Odnoshivkina JG, Averin AS, Khakimov IR, Trusov NA, Trusova DA, Petrov AM. The mechanism of 25-hydroxycholesterol-mediated suppression of atrial β1-adrenergic responses. Pflugers Arch 2024; 476:407-421. [PMID: 38253680 DOI: 10.1007/s00424-024-02913-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 12/27/2023] [Accepted: 01/14/2024] [Indexed: 01/24/2024]
Abstract
25-Hydroxycholesterol (25HC) is a biologically active oxysterol, whose production greatly increases during inflammation by macrophages and dendritic cells. The inflammatory reactions are frequently accompanied by changes in heart regulation, such as blunting of the cardiac β-adrenergic receptor (AR) signaling. Here, the mechanism of 25HC-dependent modulation of responses to β-AR activation was studied in the atria of mice. 25HC at the submicromolar levels decreased the β-AR-mediated positive inotropic effect and enhancement of the Ca2+ transient amplitude, without changing NO production. Positive inotropic responses to β1-AR (but not β2-AR) activation were markedly attenuated by 25HC. The depressant action of 25HC on the β1-AR-mediated responses was prevented by selective β3-AR antagonists as well as inhibitors of Gi protein, Gβγ, G protein-coupled receptor kinase 2/3, or β-arrestin. Simultaneously, blockers of protein kinase D and C as well as a phosphodiesterase inhibitor did not preclude the negative action of 25HC on the inotropic response to β-AR activation. Thus, 25HC can suppress the β1-AR-dependent effects via engaging β3-AR, Gi protein, Gβγ, G protein-coupled receptor kinase, and β-arrestin. This 25HC-dependent mechanism can contribute to the inflammatory-related alterations in the atrial β-adrenergic signaling.
Collapse
Affiliation(s)
- Julia G Odnoshivkina
- Kazan State Medical University, 49 Butlerova St, Kazan, RT, Russia, 420012
- Laboratory of Biophysics of Synaptic Processes, Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, 2/31 Lobachevsky St, Kazan, RT, Russia, 420111
| | - Alexey S Averin
- Institute of Cell Biophysics, Federal Research Center "Pushchino Scientific Center of Biological Research", Pushchino Branch, Russian Academy of Sciences, Pushchino, 142290, Russia
| | - Ildar R Khakimov
- Kazan State Medical University, 49 Butlerova St, Kazan, RT, Russia, 420012
| | - Nazar A Trusov
- Kazan State Medical University, 49 Butlerova St, Kazan, RT, Russia, 420012
| | - Diliara A Trusova
- Kazan State Medical University, 49 Butlerova St, Kazan, RT, Russia, 420012
| | - Alexey M Petrov
- Kazan State Medical University, 49 Butlerova St, Kazan, RT, Russia, 420012.
- Laboratory of Biophysics of Synaptic Processes, Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, 2/31 Lobachevsky St, Kazan, RT, Russia, 420111.
- Kazan Federal University, 18 Kremlyovskaya Street, Kazan, Russia, 420008.
| |
Collapse
|
2
|
Yao J, Hua X, Huo W, Xiao L, Wang Y, Tang Q, Valdivia CR, Valdivia HH, Dong W, Xiao L. The Effect of Acidic Residues on the Binding between Opicalcin1 and Ryanodine Receptor from the Structure-Functional Analysis. JOURNAL OF NATURAL PRODUCTS 2024; 87:104-112. [PMID: 38128916 PMCID: PMC10825818 DOI: 10.1021/acs.jnatprod.3c00821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 11/26/2023] [Accepted: 11/26/2023] [Indexed: 12/23/2023]
Abstract
Calcin is a group ligand with high affinity and specificity for the ryanodine receptors (RyRs). Little is known about the effect of its acidic residues on the spacial structure as well as the interaction with RyRs. We screened the opicalcin1 acidic mutants and investigated the effect of mutation on activity. The results indicated that all acidic mutants maintained the structural features, but their surface charge distribution underwent significant changes. Molecular docking and dynamics simulations were used to analyze the interaction between opicalcin1 mutants and RyRs, which demonstrated that all opicalcin1 mutants effectively bound to the channel domain of RyR1. This stable binding induced a pronounced asymmetry in the structure of the RyR tetramer, exhibiting a high degree of structural dissimilarity. [3H]Ryanodine binding to RyR1 was enhanced in D2A and D15A, which was similar to opicalcin1, but that effect was suppressed in E12A and E29A and reversed for the DE-4A, thereby inhibiting ryanodine binding. Opicalcin1 and DE-4A also exhibited the ability to form stable docking structures with RyR2. Acidic residues play a crucial role in the structure of calcin and its functional interaction with RyRs that is beneficial for the calcin optimization to develop more active peptide lead compounds for RyR-related diseases.
Collapse
Affiliation(s)
- Jinchi Yao
- School
of Life Sciences, Liaoning Normal University, Dalian116081, China
- Department
of Occupational and Environmental Health, Faculty of Naval Medicine, Naval Medical University (Second Military Medical
University), Shanghai 200433, China
| | - Xiaoyu Hua
- Department
of Occupational and Environmental Health, Faculty of Naval Medicine, Naval Medical University (Second Military Medical
University), Shanghai 200433, China
| | - Wenjing Huo
- The
305 Hospital of PLA, Beijing 100017, China
| | - Li Xiao
- Department
of Medicine and Cardiovascular Research Center, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin 53188, United States
- Department
of Forensic Toxicological Analysis, West China School of Basic Medical
Sciences and Forensic Medicine, Sichuan
University, Chengdu 610017, China
| | - Yongfang Wang
- Department
of Occupational and Environmental Health, Faculty of Naval Medicine, Naval Medical University (Second Military Medical
University), Shanghai 200433, China
| | - Qinglong Tang
- Central
Medical District of Chinese, PLA General Hospital, Beijing 100120, China
| | - Carmen R. Valdivia
- Department
of Medicine and Cardiovascular Research Center, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin 53188, United States
| | - Héctor H. Valdivia
- Department
of Medicine and Cardiovascular Research Center, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin 53188, United States
| | - Weibing Dong
- School
of Life Sciences, Liaoning Normal University, Dalian116081, China
| | - Liang Xiao
- Department
of Occupational and Environmental Health, Faculty of Naval Medicine, Naval Medical University (Second Military Medical
University), Shanghai 200433, China
| |
Collapse
|