1
|
Zhuang H, Ouyang H, Peng Y, Gong S, Xiang K, Chen L, Chen J. Expression patterns and clinical value of key m6A RNA modification regulators in smoking patients with coronary artery disease. Epigenetics 2024; 19:2392400. [PMID: 39167728 PMCID: PMC11340747 DOI: 10.1080/15592294.2024.2392400] [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: 02/14/2024] [Revised: 07/29/2024] [Accepted: 08/09/2024] [Indexed: 08/23/2024] Open
Abstract
Even though N6-methyladenosine (m6A) RNA modifications are increasingly being implicated in human disease, their mechanisms are not fully understood in smokers with coronary artery disease (CAD). Thirty m6A-related regulators' expression (MRRE) in CAD individuals (smokers and non-smokers) were analyzed from GEO. Support Vector Machine, random forest, and nomogram models were constructed to assess its clinical value. Consensus clustering, principal component analysis, and ssGSEA were used to construct a full picture of m6A-related regulators in smokers with CAD. Oxygen-glucose deprivation (OGD) and qRT-PCR were used to validate hypoxia's effect on MRRE. A comparison between smokers with CAD and controls revealed lower expression levels of RBM15B, YTHDC2, and ZC3H13. Based on three key MRREs, all models showed good clinical value, and smokers with CAD were divided into two distinct molecular subgroups. The correlations were found between key MRRE and the degree of immune infiltration. Three key MRREs in HUVECs and FMC84 mouse cardiomyocytes were reduced in the OGD group. Through hypoxia, smoking might reduce the expression levels of RBM15B, YTHDC2, and ZC3H13 in smokers with CAD. Our findings provide an important theoretical basis for the treatment of smokers with CAD.
Collapse
Affiliation(s)
- Huanwei Zhuang
- Department of Cardiovascular Surgery, Haikou Affiliated Hospital of Central South University Xiangya School of Medicine, Haikou, China
- Department of Cardiovascular Surgery, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Hua Ouyang
- Department of Thoracic Surgery, ZhuJiang Hospital of Southern Medical University, Southern Medical University, Guangzhou, China
| | - Yangfei Peng
- Department of Thoracic Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Shuji Gong
- Department of Cardiovascular Surgery, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Kun Xiang
- Department of Cardiovascular Surgery, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Le Chen
- Department of Cardiovascular Surgery, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Jinlan Chen
- Department of Cardiovascular Surgery, The Second Xiangya Hospital of Central South University, Changsha, China
| |
Collapse
|
2
|
Nguyen Tat T, Lien NTK, Luu Sy H, Ta Van T, Dang Viet D, Nguyen Thi H, Tung NV, Thanh LT, Xuan NT, Hoang NH. Identifying the Pathogenic Variants in Heart Genes in Vietnamese Sudden Unexplained Death Victims by Next-Generation Sequencing. Diagnostics (Basel) 2024; 14:1876. [PMID: 39272661 PMCID: PMC11394071 DOI: 10.3390/diagnostics14171876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2024] [Revised: 08/16/2024] [Accepted: 08/17/2024] [Indexed: 09/15/2024] Open
Abstract
In forensics, one-third of sudden deaths remain unexplained after a forensic autopsy. A majority of these sudden unexplained deaths (SUDs) are considered to be caused by inherited cardiovascular diseases. In this study, we investigated 40 young SUD cases (<40 years), with non-diagnostic structural cardiac abnormalities, using Targeted NGS (next-generation sequencing) for 167 genes previously associated with inherited cardiomyopathies and channelopathies. Fifteen cases identified 17 variants on related genes including the following: AKAP9, CSRP3, GSN, HTRA1, KCNA5, LAMA4, MYBPC3, MYH6, MYLK, RYR2, SCN5A, SCN10A, SLC4A3, TNNI3, TNNI3K, and TNNT2. Of these, eight variants were novel, and nine variants were reported in the ClinVar database. Five were determined to be pathogenic and four were not evaluated. The novel and unevaluated variants were predicted by using in silico tools, which revealed that four novel variants (c.5187_5188dup, p.Arg1730llefsTer4 in the AKAP9 gene; c.1454A>T, p.Lys485Met in the MYH6 gene; c.2535+1G>A in the SLC4A3 gene; and c.10498G>T, p.Asp3500Tyr in the RYR2 gene) were pathogenic and three variants (c.292C>G, p.Arg98Gly in the TNNI3 gene; c.683C>A, p.Pro228His in the KCN5A gene; and c.2275G>A, p.Glu759Lys in the MYBPC3 gene) still need to be further verified experimentally. The results of our study contributed to the general understanding of the causes of SUDs. They provided a scientific basis for screening the risk of sudden death in family members of victims. They also suggested that the Targeted NGS method may be used to identify the pathogenic variants in SUD victims.
Collapse
Affiliation(s)
- Tho Nguyen Tat
- Department of Forensic Medicine, Hanoi Medical University, 1 Ton That Tung Str., Dongda, Hanoi 100000, Vietnam
| | - Nguyen Thi Kim Lien
- Institute of Genome Research, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet Str., Caugiay, Hanoi 100000, Vietnam
| | - Hung Luu Sy
- Department of Forensic Medicine, Hanoi Medical University, 1 Ton That Tung Str., Dongda, Hanoi 100000, Vietnam
| | - To Ta Van
- Department of Pathology, National Cancer Hospital, 43 Quan Su Str., Hoan Kiem, Hanoi 100000, Vietnam
| | - Duc Dang Viet
- Cardiovascular Intensive Care Unit, Heart Institute, 108 Military Central Hospital, 1B Tran Hung Dao Str., Hai Ba Trung, Hanoi 100000, Vietnam
| | - Hoa Nguyen Thi
- Faculty of Biotechnology, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Str., Caugiay, Hanoi 100000, Vietnam
| | - Nguyen Van Tung
- Institute of Genome Research, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet Str., Caugiay, Hanoi 100000, Vietnam
- Faculty of Biotechnology, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Str., Caugiay, Hanoi 100000, Vietnam
| | - Le Tat Thanh
- Institute of Genome Research, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet Str., Caugiay, Hanoi 100000, Vietnam
| | - Nguyen Thi Xuan
- Institute of Genome Research, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet Str., Caugiay, Hanoi 100000, Vietnam
| | - Nguyen Huy Hoang
- Institute of Genome Research, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet Str., Caugiay, Hanoi 100000, Vietnam
- Faculty of Biotechnology, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Str., Caugiay, Hanoi 100000, Vietnam
| |
Collapse
|
3
|
Singh V, Auerbach DS. Neurocardiac pathologies associated with potassium channelopathies. Epilepsia 2024. [PMID: 39087855 DOI: 10.1111/epi.18066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 07/10/2024] [Accepted: 07/10/2024] [Indexed: 08/02/2024]
Abstract
Voltage-gated potassium channels are expressed throughout the human body and are essential for physiological functions. These include delayed rectifiers, A-type channels, outward rectifiers, and inward rectifiers. They impact electrical function in the heart (repolarization) and brain (repolarization and stabilization of the resting membrane potential). KCNQx and KCNHx encode Kv7.x and Kv11.x proteins, which form delayed rectifier potassium channels. KCNQx and KCNHx channelopathies are associated with both cardiac and neuronal pathologies. These include electrocardiographic abnormalities, cardiac arrhythmias, sudden cardiac death (SCD), epileptiform discharges, seizures, bipolar disorder, and sudden unexpected death in epilepsy (SUDEP). Due to the ubiquitous expression of KCNQx and KCNHx channels, abnormalities in their function can be particularly harmful, increasing the risk of sudden death. For example, KCNH2 variants have a dual role in both cardiac and neuronal pathologies, whereas KCNQ2 and KCNQ3 variants are associated with severe and refractory epilepsy. Recurrent and uncontrolled seizures lead to secondary abnormalities, which include autonomics, cardiac electrical function, respiratory drive, and neuronal electrical activity. Even with a wide array of anti-seizure therapies available on the market, one-third of the more than 70 million people worldwide with epilepsy have uncontrolled seizures (i.e., intractable/drug-resistant epilepsy), which negatively impact neurodevelopment and quality of life. To capture the current state of the field, this review examines KCNQx and KCNHx expression patterns and electrical function in the brain and heart. In addition, it discusses several KCNQx and KCNHx variants that have been clinically and electrophysiologically characterized. Because these channel variants are associated with multi-system pathologies, such as epileptogenesis, Kv7 channel modulators provide a potential anti-seizure therapy, particularly for people with intractable epilepsy. Ultimately an increased understanding of the role of Kv channels throughout the body will fuel the development of innovative, safe, and effective therapies for people at a high risk of sudden death (SCD and SUDEP).
Collapse
Affiliation(s)
- Veronica Singh
- Department of Pharmacology, SUNY Upstate Medical University, Syracuse, New York, USA
| | - David S Auerbach
- Department of Pharmacology, SUNY Upstate Medical University, Syracuse, New York, USA
| |
Collapse
|
4
|
Zhu W, Bian X, Lv J. From genes to clinical management: A comprehensive review of long QT syndrome pathogenesis and treatment. Heart Rhythm O2 2024; 5:573-586. [PMID: 39263612 PMCID: PMC11385408 DOI: 10.1016/j.hroo.2024.07.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/13/2024] Open
Abstract
Background Long QT syndrome (LQTS) is a rare cardiac disorder characterized by prolonged ventricular repolarization and increased risk of ventricular arrhythmias. This review summarizes current knowledge of LQTS pathogenesis and treatment strategies. Objectives The purpose of this study was to provide an in-depth understanding of LQTS genetic and molecular mechanisms, discuss clinical presentation and diagnosis, evaluate treatment options, and highlight future research directions. Methods A systematic search of PubMed, Embase, and Cochrane Library databases was conducted to identify relevant studies published up to April 2024. Results LQTS involves mutations in ion channel-related genes encoding cardiac ion channels, regulatory proteins, and other associated factors, leading to altered cellular electrophysiology. Acquired causes can also contribute. Diagnosis relies on clinical history, electrocardiographic findings, and genetic testing. Treatment strategies include lifestyle modifications, β-blockers, potassium channel openers, device therapy, and surgical interventions. Conclusion Advances in understanding LQTS have improved diagnosis and personalized treatment approaches. Challenges remain in risk stratification and management of certain patient subgroups. Future research should focus on developing novel pharmacological agents, refining device technologies, and conducting large-scale clinical trials. Increased awareness and education are crucial for early detection and appropriate management of LQTS.
Collapse
Affiliation(s)
- Wenjing Zhu
- Department of Pulmonary and Critical Care Medicine, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
| | - Xueyan Bian
- Department of Pediatrics, Lixia District People's Hospital, Jinan, Shandong, China
| | - Jianli Lv
- Department of Pediatric Cardiology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
| |
Collapse
|
5
|
Murphy J, Kirk CW, Lambert DM, McGorrian C, Walsh R, McVeigh TP, Prendiville T, Ward D, Galvin J, Lynch SA. Diagnostic yield from cardiac gene testing for inherited cardiac conditions and re-evaluation of pre-ACMG variants of uncertain significance. Ir J Med Sci 2024; 193:1775-1785. [PMID: 38489124 DOI: 10.1007/s11845-024-03650-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 02/23/2024] [Indexed: 03/17/2024]
Abstract
BACKGROUND Inherited cardiomyopathies (HCM, DCM, ACM) and cardiac ion channelopathies (long QT/Brugada syndromes, CPVT) are associated with significant morbidity and mortality; however, diagnosis of a familial pathogenic variant in a proband allows for subsequent cascade screening of their at-risk relatives. AIMS We investigated the diagnostic yield from cardiac gene panel testing and reviewed variants of uncertain significance from patients attending three specialist cardiogenetics services in Ireland in the years 2002 to 2020. RESULTS Reviewing molecular genetic diagnostic reports of 834 patients from 820 families, the initial diagnostic yield of pathogenic/likely pathogenic variants was 237/834 patients (28.4%), increasing to 276/834 patients (33.1%) following re-evaluation of cases with variant(s) of uncertain significance. Altogether, 42/85 patients with VUS reviewed (49.4%) had a re-classification that could change their clinical management. Females were more likely to carry pathogenic/likely pathogenic variants than males (139/374, 37.2% vs 137/460, 29.8%, respectively, p = 0.03), and the diagnostic yields were highest in the 0 to < 2 years age group (6/12, 50.0%) and amongst those tested for cardiomyopathy gene panels (13/35, 37.1%). Variants in the MYBPC3/MYH7 (87/109, 79.8%) and KCNQ1/KCNH2 (91/100, 91.0%) genes were the predominant genetic causes for hypertrophic cardiomyopathy and long QT syndrome, respectively. CONCLUSION Our study highlights the importance of collation and review of pre-ACMG genetic variants to increase diagnostic utility of genetic testing for inherited heart disease. Almost half of patients with pre-ACMG VUS reviewed had their variant re-classified to likely pathogenic/likely benign which resulted in a positive clinical impact for patients and their families.
Collapse
Affiliation(s)
- Jane Murphy
- School of Medicine, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Claire W Kirk
- School of Medicine, University College Dublin, Belfield, Dublin 4, Ireland
| | - Deborah M Lambert
- School of Medicine, University College Dublin, Belfield, Dublin 4, Ireland
| | - Catherine McGorrian
- Family Heart Screening Clinic, Mater Misericordiae University Hospital, Eccles Street, Dublin 7, Ireland
| | - Roddy Walsh
- Department of Clinical and Experimental Cardiology, Heart Centre, Amsterdam University Medical Centres, University of Amsterdam, Amsterdam, Netherlands
| | - Terri P McVeigh
- Royal Marsden NHS Foundation Trust, Fulham Road, London, SW3 6JJ, United Kingdom
| | - Terence Prendiville
- Department of Cardiology, Children's Health Ireland at Crumlin, Crumlin, Dublin 12, Ireland
| | - Deirdre Ward
- Centre for Cardiac Risk in the Young Persons, Tallaght University Hospital, Dublin 24, Ireland
| | - Joseph Galvin
- Family Heart Screening Clinic, Mater Misericordiae University Hospital, Eccles Street, Dublin 7, Ireland
| | - Sally Ann Lynch
- Department of Clinical Genetics, Children's Health Ireland at Crumlin, Crumlin, Dublin 12, Ireland
| |
Collapse
|
6
|
Elsaman T, Ahmad I, Eltayib EM, Suliman Mohamed M, Yusuf O, Saeed M, Patel H, Mohamed MA. Flavonostilbenes natural hybrids from Rhamnoneuron balansae as potential antitumors targeting ALDH1A1: molecular docking, ADMET, MM-GBSA calculations and molecular dynamics studies. J Biomol Struct Dyn 2024; 42:3249-3266. [PMID: 37261483 DOI: 10.1080/07391102.2023.2218936] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 05/05/2023] [Indexed: 06/02/2023]
Abstract
Several studies have linked Cancer stem cells (CSCs) to cancer resistance development to chemotherapy and radiotherapy. ALDH1A1 is a key enzyme that regulates the gene expression of CSCs and creates an immunosuppressive tumor microenvironment. It was reported that quercetin and resveratrol were among the inhibitors of ALDH1A1. In early 2022, it was reported that new 11 flavonostilbenes (rhamnoneuronal D-N) were isolated from Rhamnoneuron balansae as potential antiaging natural products. Rhamnoneuronal H (5) could be envisioned as a natural hybrid of quercetin and resveratrol. It was therefore hypothesized that 5 and its analogous isolates rhamnoneuronal D-G (1-4) and rhamnoneuronal I-N (6-11) would have potential ALDH1A1 inhibitory activity. To this end, all isolates were subjected to molecular docking, MM-GBSA, ADMET, and molecular dynamics simulations studies to assess their potential as new leads for cancer treatment targeting ALDH1A1. In silico findings revealed that natural hybrid 5 has a similar binding affinity, judged by MM-GBSA, to the ALDH1A1 active site when compared to the co-crystalized ligand (-64.71 kcal/mole and -64.12 kcal/mole, respectively). Despite having lesser affinity than that of the co-crystalized ligand, the rest of the flavonostilbenes, except 2-4, displayed better binding affinities (-37.55 kcal/mole to -58.6 kcal/mole) in comparison to either resveratrol (-34.44 kcal/mole) or quercetin (-36.48 kcal/mole). Molecular dynamic simulations showed that the natural hybrids 1, 5-11 are of satisfactory stability up to 100 ns. ADMET outcomes indicate that these hybrids displayed acceptable properties and hence could represent an ideal starting point for the development of potent ALDH1A1 inhibitors for cancer treatment.Communicated by Ramaswamy H. Sarma.
Collapse
Affiliation(s)
- Tilal Elsaman
- Department of Pharmaceutical Chemistry, College of Pharmacy, Jouf University, Sakaka, Al Jouf, Saudi Arabia
| | - Iqrar Ahmad
- Department of Pharmaceutical Chemistry, Prof. Ravindra Nikam College of Pharmacy, Dhule, Maharashtra, India
- Division of Computer Aided Drug Design, Department of Pharmaceutical Chemistry, R. C. Patel Institute of Pharmaceutical Education and Research, Shirpur, Maharashtra, India
| | - Eyman Mohamed Eltayib
- Department of Pharmaceutics, College of Pharmacy, Jouf University, Sakaka, Al Jouf, Saudi Arabia
| | - Malik Suliman Mohamed
- Department of Pharmaceutics, College of Pharmacy, Jouf University, Sakaka, Al Jouf, Saudi Arabia
| | - Osman Yusuf
- Department of Pharmaceutics, Faculty of Pharmacy, Al-Neelain University, Khartoum, Sudan
| | | | - Harun Patel
- Division of Computer Aided Drug Design, Department of Pharmaceutical Chemistry, R. C. Patel Institute of Pharmaceutical Education and Research, Shirpur, Maharashtra, India
| | - Magdi Awadalla Mohamed
- Department of Pharmaceutical Chemistry, College of Pharmacy, Jouf University, Sakaka, Al Jouf, Saudi Arabia
| |
Collapse
|
7
|
Stinchfield MJ, Weasner BP, Weasner BM, Zhitomersky D, Kumar JP, O’Connor MB, Newfeld SJ. Fourth Chromosome Resource Project: a comprehensive resource for genetic analysis in Drosophila that includes humanized stocks. Genetics 2024; 226:iyad201. [PMID: 37981656 PMCID: PMC10847715 DOI: 10.1093/genetics/iyad201] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 11/09/2023] [Accepted: 11/13/2023] [Indexed: 11/21/2023] Open
Abstract
The fourth chromosome is the final frontier for genetic analysis in Drosophila. Small, heterochromatic, and devoid of recombination the fourth has long been ignored. Nevertheless, its long arm contains 79 protein-coding genes. The Fourth Chromosome Resource Project (FCRP) has a goal of facilitating the investigation of genes on this neglected chromosome. The project has 446 stocks publicly available at the Bloomington and Kyoto stock centers with phenotypic data curated by the FlyBase and FlyPush resources. Four of the five stock sets are nearly complete: (1) UAS.fly cDNAs, (2) UAS.human homolog cDNAs, (3) gene trap mutants and protein traps, and (4) stocks promoting meiotic and mitotic recombination on the fourth. Ongoing is mutagenesis of each fourth gene on a new FRT-bearing chromosome for marked single-cell clones. Beyond flies, FCRP facilitates the creation and analysis of humanized fly stocks. These provide opportunities to apply Drosophila genetics to the analysis of human gene interaction and function. In addition, the FCRP provides investigators with confidence through stock validation and an incentive via phenotyping to tackle genes on the fourth that have never been studied. Taken together, FCRP stocks will facilitate all manner of genetic and molecular studies. The resource is readily available to researchers to enhance our understanding of metazoan biology, including conserved molecular mechanisms underlying health and disease.
Collapse
Affiliation(s)
| | | | - Bonnie M Weasner
- Department Biology, Indiana University, Bloomington, IN 47405, USA
| | - David Zhitomersky
- Department Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, MN 55455, USA
| | - Justin P Kumar
- Department Biology, Indiana University, Bloomington, IN 47405, USA
| | - Michael B O’Connor
- Department Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, MN 55455, USA
| | - Stuart J Newfeld
- School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA
| |
Collapse
|
8
|
Peng CX, Liang F, Xia YH, Zhao KL, Hou MH, Zhang GJ. Recent Advances and Challenges in Protein Structure Prediction. J Chem Inf Model 2024; 64:76-95. [PMID: 38109487 DOI: 10.1021/acs.jcim.3c01324] [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] [Indexed: 12/20/2023]
Abstract
Artificial intelligence has made significant advances in the field of protein structure prediction in recent years. In particular, DeepMind's end-to-end model, AlphaFold2, has demonstrated the capability to predict three-dimensional structures of numerous unknown proteins with accuracy levels comparable to those of experimental methods. This breakthrough has opened up new possibilities for understanding protein structure and function as well as accelerating drug discovery and other applications in the field of biology and medicine. Despite the remarkable achievements of artificial intelligence in the field, there are still some challenges and limitations. In this Review, we discuss the recent progress and some of the challenges in protein structure prediction. These challenges include predicting multidomain protein structures, protein complex structures, multiple conformational states of proteins, and protein folding pathways. Furthermore, we highlight directions in which further improvements can be conducted.
Collapse
Affiliation(s)
- Chun-Xiang Peng
- College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China
| | - Fang Liang
- College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China
| | - Yu-Hao Xia
- College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China
| | - Kai-Long Zhao
- College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China
| | - Ming-Hua Hou
- College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China
| | - Gui-Jun Zhang
- College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China
| |
Collapse
|
9
|
Linani A, Benarous K, Erol E, Bou-Salah L, Serseg T, Yousfi M. In silico analysis of identified molecules using LC-HR/MS of Cupressus sempervirens L. ethyl acetate fraction against three monkeypox virus targets. J Biomol Struct Dyn 2023:1-16. [PMID: 37982304 DOI: 10.1080/07391102.2023.2283149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 11/06/2023] [Indexed: 11/21/2023]
Abstract
Monkeypox virus is a viral disease transmitted to humans through contact with infected animals, such as monkeys and rodents, or through direct contact with the bodily fluids or lesions of infected humans. The aim of this study is to evaluate in silico the inhibition effect of eight Cupressus sempervirens L. ethyl acetate fraction identified molecules using LC-MS on three monkeypox targets such as the vaccinia virus thymidylate kinase (VTK), the viral profilin-like protein (VPP), and the viral RNA polymerase (VRP). The study consist of using molecular docking with AutoDock vina based on the lowest energy value in kcal/mol, pharmacokinetics prediction with pre-ADMET v2.0 server, and prediction of biological activity with the PASS server tool. The best complexes were subjected to molecular dynamics simulation (MD) study to confirm their stability using Desmond software. The used molecules were vitamin C, vanillic acid (Pol), Flav1 (Catechin), Flav2 (Epicatechin), Flav3 (Hyperoside), Flav4 (Luteolin), Flav5 (Taxifolin), and Flav6 (Quercetin). The results show that flavonoids are potent to VTK, VPP and effectively block the VRP channel with energy values ranging from -7.0 to -9.3 kcal/mol. Further, MD simulation supports Flav1 and, Flav2 for notable stability in the VTK binding pocket through hydrogen and hydrophobic interactions. PASS results predicted various biological activities with promising VTK and VRP inhibition activities. The studied molecules could constitute a safer alternative to current drugs, which often cause adverse side effects.Communicated by Ramaswamy H. Sarma.
Collapse
Affiliation(s)
- Abderahmane Linani
- Fundamental sciences laboratory, Amar Telidji University, Laghouat, Algeria
| | - Khedidja Benarous
- Fundamental sciences laboratory, Amar Telidji University, Laghouat, Algeria
| | - Ebru Erol
- Faculty of Pharmacy, Department of Analytical Chemistry, Bezmialem Vakif University, Istanbul, Türkiye
| | - Leila Bou-Salah
- Fundamental sciences laboratory, Amar Telidji University, Laghouat, Algeria
| | - Talia Serseg
- Fundamental sciences laboratory, Amar Telidji University, Laghouat, Algeria
- Laboratoire de sciences appliquées et didactiques, Ecole Normale Supérieure de Laghouat, Laghouat, Algeria
| | - Mohamed Yousfi
- Fundamental sciences laboratory, Amar Telidji University, Laghouat, Algeria
| |
Collapse
|
10
|
Murad H, Rafeeq M. Cheminformatics approach for identification of N-HyMenatPimeMelly as a novel potential ligand against RAS and renal chloride channel. J Biomol Struct Dyn 2023:1-15. [PMID: 37882351 DOI: 10.1080/07391102.2023.2273439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 10/14/2023] [Indexed: 10/27/2023]
Abstract
Some angiotensin receptor (AR) blockers interfere with the renal chloride channel (ClC-K), which plays an important role in urine concentration. Identifying ligands targeting this channel, whether activating or blocking, is highly desirable because it could open the way for interventions that modulate their activity. In this study, the Asinex (BioDesign) complete library was screened to identify a compound with favorable physicochemical and pharmacokinetic properties, which have both AR blocking and ClC-Ka-modulating activities to present it as a novel potential oral candidate which could be useful for treatment of salt-sensitive hypertension without major ClC-K affection. A compound, N-{[4-Hydroxy-1-(2-methyl-1,6-naphthyridin-4-yl)-4-piperidinyl]methyl}-N-methyl-L-lysinamide (N-HyMenatPimeMelly) (Chem Spider ID 68416221), was identified as a potent potential oral ligand of the renin-angiotensin system (RAS) and ClC-Ka with docking scores ranging from -10.978 to -7.324 with the four selected proteins (4YAY: AR type 1, 2PFI: Cytoplasmic domain of ClC-Ka, 6JOD: AR type 2 and 6M0J: Angiotensin-converting enzyme 2). The protein-ligand complex was used to perform molecular dynamics (MD) simulation for 100 ns. The QikProp and SwissADME tools' results showed that the compound has ADME/T and drug-likeness properties, which are within the permissible ranges for 95% of known drugs. The density functional theory (DFT) analysis and MD simulation extended the study toward computational validation. Throughout the study, N-HyMenatPimeMelly has shown good interactions and stable performance in MD simulation and DFT analysis. The whole analysis has produced promising results, and N-HyMenatPimeMelly can be treated as a novel potential RAS and ClC-K oral ligand, however, experimental validation is needed before human use.Communicated by Ramaswamy H. Sarma.
Collapse
Affiliation(s)
- Hussam Murad
- Department of Pharmacology, Faculty of Medicine, Rabigh Campus, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Misbahudin Rafeeq
- Department of Pharmacology, Faculty of Medicine, Rabigh Campus, King Abdulaziz University, Jeddah, Saudi Arabia
| |
Collapse
|
11
|
Chan M, Sahakyan H, Eldstrom J, Sastre D, Wang Y, Dou Y, Pourrier M, Vardanyan V, Fedida D. A generic binding pocket for small molecule IKs activators at the extracellular inter-subunit interface of KCNQ1 and KCNE1 channel complexes. eLife 2023; 12:RP87038. [PMID: 37707495 PMCID: PMC10501768 DOI: 10.7554/elife.87038] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/15/2023] Open
Abstract
The cardiac IKs ion channel comprises KCNQ1, calmodulin, and KCNE1 in a dodecameric complex which provides a repolarizing current reserve at higher heart rates and protects from arrhythmia syndromes that cause fainting and sudden death. Pharmacological activators of IKs are therefore of interest both scientifically and therapeutically for treatment of IKs loss-of-function disorders. One group of chemical activators are only active in the presence of the accessory KCNE1 subunit and here we investigate this phenomenon using molecular modeling techniques and mutagenesis scanning in mammalian cells. A generalized activator binding pocket is formed extracellularly by KCNE1, the domain-swapped S1 helices of one KCNQ1 subunit and the pore/turret region made up of two other KCNQ1 subunits. A few residues, including K41, A44 and Y46 in KCNE1, W323 in the KCNQ1 pore, and Y148 in the KCNQ1 S1 domain, appear critical for the binding of structurally diverse molecules, but in addition, molecular modeling studies suggest that induced fit by structurally different molecules underlies the generalized nature of the binding pocket. Activation of IKs is enhanced by stabilization of the KCNQ1-S1/KCNE1/pore complex, which ultimately slows deactivation of the current, and promotes outward current summation at higher pulse rates. Our results provide a mechanistic explanation of enhanced IKs currents by these activator compounds and provide a map for future design of more potent therapeutically useful molecules.
Collapse
Affiliation(s)
- Magnus Chan
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British ColumbiaVancouverCanada
| | - Harutyun Sahakyan
- Laboratory of Computational Modeling of Biological Processes, Institute of Molecular BiologyYerevanArmenia
| | - Jodene Eldstrom
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British ColumbiaVancouverCanada
| | - Daniel Sastre
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British ColumbiaVancouverCanada
| | - Yundi Wang
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British ColumbiaVancouverCanada
| | - Ying Dou
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British ColumbiaVancouverCanada
| | - Marc Pourrier
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British ColumbiaVancouverCanada
| | - Vitya Vardanyan
- Molecular Neuroscience Group, Institute of Molecular BiologyYerevanArmenia
| | - David Fedida
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British ColumbiaVancouverCanada
| |
Collapse
|
12
|
Kotta M, Torchio M, Bayliss P, Cohen MC, Quarrell O, Wheeldon N, Marton T, Gentilini D, Crotti L, Coombs RC, Schwartz PJ. Cardiac Genetic Investigation of Sudden Infant and Early Childhood Death: A Study From Victims to Families. J Am Heart Assoc 2023; 12:e029100. [PMID: 37589201 PMCID: PMC10547337 DOI: 10.1161/jaha.122.029100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 06/27/2023] [Indexed: 08/18/2023]
Abstract
Background Sudden infant death syndrome (SIDS) is the leading cause of death up to age 1. Sudden unexplained death in childhood (SUDC) is similar but affects mostly toddlers aged 1 to 4. SUDC is rarer than SIDS, and although cardiogenetic testing (molecular autopsy) identifies an underlying cause in a fraction of SIDS, less is known about SUDC. Methods and Results Seventy-seven SIDS and 16 SUDC cases underwent molecular autopsy with 25 definitive-evidence arrhythmia-associated genes. In 18 cases, another 76 genes with varying degrees of evidence were analyzed. Parents were offered cascade screening. Double-blind review of clinical-genetic data established genotype-phenotype correlations. The yield of likely pathogenic variants in the 25 genes was higher in SUDC than in SIDS (18.8% [3/16] versus 2.6% [2/77], respectively; P=0.03), whereas novel/ultra-rare variants of uncertain significance were comparably represented. Rare variants of uncertain significance and likely benign variants were found only in SIDS. In cases with expanded analyses, likely pathogenic/likely benign variants stemmed only from definitive-evidence genes, whereas all other genes contributed only variants of uncertain significance. Among 24 parents screened, variant status and phenotype largely agreed, and 3 cases positively correlated for cardiac channelopathies. Genotype-phenotype correlations significantly aided variant adjudication. Conclusions Genetic yield is higher in SUDC than in SIDS although, in both, it is contributed only by definitive-evidence genes. SIDS/SUDC cascade family screening facilitates establishment or dismissal of a diagnosis through definitive variant adjudication indicating that anonymity is no longer justifiable. Channelopathies may underlie a relevant fraction of SUDC. Binary classifications of genetic causality (pathogenic versus benign) could not always be adequate.
Collapse
Affiliation(s)
- Maria‐Christina Kotta
- Center for Cardiac Arrhythmias of Genetic Origin and Laboratory of Cardiovascular GeneticsIRCCS Istituto Auxologico ItalianoMilanItaly
| | - Margherita Torchio
- Center for Cardiac Arrhythmias of Genetic Origin and Laboratory of Cardiovascular GeneticsIRCCS Istituto Auxologico ItalianoMilanItaly
| | - Pauline Bayliss
- Department of Clinical GeneticsSheffield Children’s NHS Foundation TrustSheffieldUnited Kingdom
| | - Marta C. Cohen
- Department of HistopathologySheffield Children’s NHS Foundation TrustSheffieldUnited Kingdom
| | - Oliver Quarrell
- Sheffield Children’s Hospital NHS Foundation TrustSheffieldUnited Kingdom
- Department of NeurosciencesUniversity of SheffieldSheffieldUnited Kingdom
| | - Nigel Wheeldon
- Cardiothoracic CentreNorthern General Hospital, Sheffield Teaching Hospitals NHS TrustSheffieldUnited Kingdom
| | - Tamás Marton
- Cellular Pathology DepartmentBirmingham Women’s and Children’s HospitalBirminghamUnited Kingdom
| | - Davide Gentilini
- Bioinformatics and Statistical Genetics UnitIRCCS Istituto Auxologico ItalianoMilanItaly
| | - Lia Crotti
- Center for Cardiac Arrhythmias of Genetic Origin and Laboratory of Cardiovascular GeneticsIRCCS Istituto Auxologico ItalianoMilanItaly
- Department of Medicine and SurgeryUniversity of Milano‐BicoccaMilanItaly
| | - Robert C. Coombs
- Department of NeonatologySheffield Teaching Hospitals. NHS TrustSheffieldUnited Kingdom
| | - Peter J. Schwartz
- Center for Cardiac Arrhythmias of Genetic Origin and Laboratory of Cardiovascular GeneticsIRCCS Istituto Auxologico ItalianoMilanItaly
| |
Collapse
|
13
|
Linani A, Serseg T, Benarous K, Bou-Salah L, Yousfi M, Alama MN, Ashraf GM. Cupressus sempervirens L. flavonoids as potent inhibitors to xanthine oxidase: in vitro, molecular docking, ADMET and PASS studies. J Biomol Struct Dyn 2023; 41:7055-7068. [PMID: 36001586 DOI: 10.1080/07391102.2022.2114943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 08/14/2022] [Indexed: 10/15/2022]
Abstract
Excessive intake of purine-rich foods such as seafood and red meat leads to excess xanthine oxidase activity and provokes gout attacks. The aim of this paper is to evaluate in vitro and in silico, the inhibition effect of Cupressus sempervirens plant extracts (flavonoids (Cae) and alkaloids (CaK)) and its six derivative compounds on bovine xanthine oxidase (BXO). The in silico study consists of molecular docking with GOLD v4.0 based on the best PLPchem score (PLP) and prediction of biological activity with the PASS server tool. The inhibitors used were lignan (cp1), Amentoflavone (cp2), Cupressuflavone (cp3), Isocryptomerin (cp4), Hinokiflavone (cp5), and Neolignan (cp6). The in vitro results showed that CaK gives an IC50 of 3.52 ± 0.04 μg/ml. Similarly, Cae saved an IC50 of 8.46 ± 1.98 μg/ml compared with the control (2.82 ± 0.10 μg/ml). The in silico results show that cp1 was the best inhibitor model (PLP of 88.09) with approved pharmacokinetics. These findings suggest that cp1 and cp2 may offer good alternatives for the treatment of hyperuricemia; cp3 was moderate, while the others (cp4 to cp6) were considered weak inhibitors according to their PLP.Communicated by Ramaswamy H. Sarma.
Collapse
Affiliation(s)
- Abderahmane Linani
- Fundamental sciences laboratory, Amar Telidji University, Laghouat, Algeria
| | - Talia Serseg
- Fundamental sciences laboratory, Amar Telidji University, Laghouat, Algeria
| | - Khedidja Benarous
- Fundamental sciences laboratory, Amar Telidji University, Laghouat, Algeria
- Biology department, Amar Telidji University, Laghouat, Algeria
| | - Leila Bou-Salah
- Fundamental sciences laboratory, Amar Telidji University, Laghouat, Algeria
| | - Mohamed Yousfi
- Fundamental sciences laboratory, Amar Telidji University, Laghouat, Algeria
| | - Mohammed Nabil Alama
- Department of Cardiology, Faculty of Medicine, King Abdulaziz University Hospital, Jeddah, Saudi Arabia
| | - Ghulam Md Ashraf
- Pre-Clinical Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| |
Collapse
|
14
|
Bender AM, Parr LC, Livingston WB, Lindsley CW, Merryman WD. 2B Determined: The Future of the Serotonin Receptor 2B in Drug Discovery. J Med Chem 2023; 66:11027-11039. [PMID: 37584406 PMCID: PMC11073569 DOI: 10.1021/acs.jmedchem.3c01178] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/17/2023]
Abstract
The cardiotoxicity associated with des-ethyl-dexfenfluramine (norDF) and related agonists of the serotonin receptor 2B (5-HT2B) has solidified the receptor's place as an "antitarget" in drug discovery. Conversely, a growing body of evidence has highlighted the utility of 5-HT2B antagonists for the treatment of pulmonary arterial hypertension (PAH), valvular heart disease (VHD), and related cardiopathies. In this Perspective, we summarize the link between the clinical failure of fenfluramine-phentermine (fen-phen) and the subsequent research on the role of 5-HT2B in disease progression, as well as the development of drug-like and receptor subtype-selective 5-HT2B antagonists. Such agents represent a promising class for the treatment of PAH and VHD, but their utility has been historically understudied due to the clinical disasters associated with 5-HT2B. Herein, it is our aim to examine the current state of 5-HT2B drug discovery, with an emphasis on the receptor's role in the central nervous system (CNS) versus the periphery.
Collapse
Affiliation(s)
- Aaron M Bender
- Warren Center for Neuroscience Drug Discovery, Vanderbilt University, Nashville, Tennessee 37232, United States
- Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
| | - Lauren C Parr
- Warren Center for Neuroscience Drug Discovery, Vanderbilt University, Nashville, Tennessee 37232, United States
- Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
| | - William B Livingston
- Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee 37240, United States
| | - Craig W Lindsley
- Warren Center for Neuroscience Drug Discovery, Vanderbilt University, Nashville, Tennessee 37232, United States
- Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37232, United States
- Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee 37232, United States
- Department of Biochemistry, Vanderbilt University, Nashville, Tennessee 37232, United States
| | - W David Merryman
- Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee 37240, United States
| |
Collapse
|
15
|
Wallace MJ, Malhotra N, Mariángelo JIE, Stevens TL, Young LJ, Antwi-Boasiako S, Abdallah D, Takenaka SS, Cavus O, Murphy NP, Han M, Xu X, Mangoni ME, Hund TJ, Roberts JD, Györke S, Mohler PJ, El Refaey M. Impact of stress on cardiac phenotypes in mice harboring an ankyrin-B disease variant. J Biol Chem 2023; 299:104818. [PMID: 37182735 PMCID: PMC10318515 DOI: 10.1016/j.jbc.2023.104818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 05/04/2023] [Accepted: 05/06/2023] [Indexed: 05/16/2023] Open
Abstract
Encoded by ANK2, ankyrin-B (AnkB) is a multifunctional adapter protein critical for the expression and targeting of key cardiac ion channels, transporters, cytoskeletal-associated proteins, and signaling molecules. Mice deficient for AnkB expression are neonatal lethal, and mice heterozygous for AnkB expression display cardiac structural and electrical phenotypes. Human ANK2 loss-of-function variants are associated with diverse cardiac manifestations; however, human clinical 'AnkB syndrome' displays incomplete penetrance. To date, animal models for human arrhythmias have generally been knock-out or transgenic overexpression models and thus the direct impact of ANK2 variants on cardiac structure and function in vivo is not clearly defined. Here, we directly tested the relationship of a single human ANK2 disease-associated variant with cardiac phenotypes utilizing a novel in vivo animal model. At baseline, young AnkBp.E1458G+/+ mice lacked significant structural or electrical abnormalities. However, aged AnkBp.E1458G+/+ mice displayed both electrical and structural phenotypes at baseline including bradycardia and aberrant heart rate variability, structural remodeling, and fibrosis. Young and old AnkBp.E1458G+/+ mice displayed ventricular arrhythmias following acute (adrenergic) stress. In addition, young AnkBp.E1458G+/+ mice displayed structural remodeling following chronic (transverse aortic constriction) stress. Finally, AnkBp.E1458G+/+ myocytes harbored alterations in expression and/or localization of key AnkB-associated partners, consistent with the underlying disease mechanism. In summary, our findings illustrate the critical role of AnkB in in vivo cardiac function as well as the impact of single AnkB loss-of-function variants in vivo. However, our findings illustrate the contribution and in fact necessity of secondary factors (aging, adrenergic challenge, pressure-overload) to phenotype penetrance and severity.
Collapse
Affiliation(s)
- Michael J Wallace
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA
| | - Nipun Malhotra
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Surgery/Division of Cardiac Surgery, The Ohio State University, Columbus, Ohio, USA
| | - Juan Ignacio Elio Mariángelo
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA
| | - Tyler L Stevens
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA
| | - Lindsay J Young
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Steve Antwi-Boasiako
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Danielle Abdallah
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Sarah Sumie Takenaka
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Omer Cavus
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Nathaniel P Murphy
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Mei Han
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Xianyao Xu
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Matteo E Mangoni
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Thomas J Hund
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, Ohio, USA; Department of Internal Medicine/Division of Cardiovascular Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Jason D Roberts
- Population Health Research Institute, McMaster University, and Hamilton Health Sciences, Hamilton, Ontario, Canada
| | - Sandor Györke
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA
| | - Peter J Mohler
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA; Department of Internal Medicine/Division of Cardiovascular Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Mona El Refaey
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Surgery/Division of Cardiac Surgery, The Ohio State University, Columbus, Ohio, USA.
| |
Collapse
|
16
|
Saini R, Kumari S, Bhatnagar A, Singh A, Mishra A. Discovery of the allosteric inhibitor from actinomyces metabolites to target EGFR CSTMLR mutant protein: molecular modeling and free energy approach. Sci Rep 2023; 13:8885. [PMID: 37264083 DOI: 10.1038/s41598-023-33065-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 04/06/2023] [Indexed: 06/03/2023] Open
Abstract
EGFR (epidermal growth factor receptor), a surface protein on the cell, belongs to the tyrosine kinase family, responsible for cell growth and proliferation. Overexpression or mutation in the EGFR gene leads to various types of cancer, i.e., non-small cell lung cancer, breast, and pancreatic cancer. Bioactive molecules identified in this genre were also an essential source of encouragement for researchers who accomplished the design and synthesis of novel compounds with anticancer properties. World Health Organization (WHO) report states that antibiotic resistance is one of the most severe risks to global well-being, food safety, and development. The world needs to take steps to lessen this danger, such as developing new antibiotics and regulating their use. In this study, 6524 compounds derived from Streptomyces sp. were subjected to drug-likeness filters, molecular docking, and molecular dynamic simulation for 1000 ns to find new triple mutant EGFRCSTMLR (EGFR-L858R/T790M/C797S) inhibitors. Docking outcomes revealed that five compounds showed better binding affinity (- 9.074 to - 9.3 kcal/mol) than both reference drug CH7233163 (- 6.11 kcal/mol) and co-crystallized ligand Osimertinib (- 8.07 kcal/mol). Further, molecular dynamic simulation confirmed that ligand C_42 exhibited the best interaction at the active site of EGFR protein and comprised a better average radius of gyration (3.87 Å) and average SASA (Solvent Accessible Surface Area) (82.91 Å2) value than co-crystallized ligand (4.49 Å, 222.38 Å2). Additionally, its average RMSD (Root Mean Square Deviation) (3.25 Å) and RMSF (Root Mean Square Fluctuation) (1.54 Å) values were highly similar to co-crystallized ligand (3.07 Å, 1.54 Å). Compared to the reference ligand, it also demonstrated conserved H-bond interactions with the residues MET_793 and GLN_791 with strong interaction probability. In conclusion, we have found a potential drug with no violation of the rule of three, Lipinski's rule of five, and 26 other vital parameters having great potential in medicinal and pharmaceutical industries applications and can overcome synthetic drug issues.
Collapse
Affiliation(s)
- Ravi Saini
- School of Biochemical Engineering, Indian Institute of Technology (BHU), Varanasi, 221005, India
| | - Sonali Kumari
- School of Biochemical Engineering, Indian Institute of Technology (BHU), Varanasi, 221005, India
| | - Aditi Bhatnagar
- School of Biochemical Engineering, Indian Institute of Technology (BHU), Varanasi, 221005, India
| | - Amit Singh
- Department of Pharmacology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, 221005, India.
| | - Abha Mishra
- School of Biochemical Engineering, Indian Institute of Technology (BHU), Varanasi, 221005, India.
| |
Collapse
|
17
|
Fazelifar AF, Pourirahim M, Masoumi T, Biglari A, Maleki M, Kalayinia S. Identification of a novel pathogenic variant in KCNH2 in an Iranian family with long QT syndrome 2 by whole-exome sequencing. J Arrhythm 2023; 39:430-453. [PMID: 37324772 PMCID: PMC10264754 DOI: 10.1002/joa3.12857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 04/05/2023] [Accepted: 04/06/2023] [Indexed: 06/17/2023] Open
Abstract
Background Long QT syndrome (LQTS) is a lethal cardiac condition. However, the clinical implementation of genetic testing has now made LQTS eminently treatable. Next-generation sequencing has remarkable potential for both clinical diagnostics and research of LQTS. Here, we investigated the genetic etiology in an LQTS-suspected Iranian pedigree by whole-exome sequencing and collected all KCNH2 variants with consensus based on publications. Methods WES was performed on the proband of this pedigree to reveal the underlying cause of sudden cardiac death (SCD). The variant found was validated and segregated by polymerase chain reaction and Sanger sequencing. Based on the literature review, KCNH2 variants were retrospectively analyzed to identify pathogenic variants, likely pathogenic variants, and variants of uncertain significance by using different prediction tools. Results WES identified an autosomal dominant nonsense variant, c.1425C>A: p.Tyr475Ter, in the KCNH2 gene, which appeared to be the most likely cause of LQTS in this pedigree. Moreover, our comprehensive literature review yielded 511 KCNH2 variants in association with the LQTS phenotype, with c.3002G>A (CADD Phred=49) being the most pathogenic variant. Conclusions Variants in the KCNH2 gene are considered a major cause of LQTS worldwide. The detected c.1425C>A is a novel variant to be reported from Iran for the first time. This result indicates the importance of KCNH2 screening in a pedigree with SCD cases.
Collapse
Affiliation(s)
- Amir Farjam Fazelifar
- Rajaie Cardiovascular Medical and Research CenterIran University of Medical SciencesTehranIran
| | - Maryam Pourirahim
- Cardiogenetic Research Center, Rajaie Cardiovascular Medical and Research CenterIran University of Medical SciencesTehranIran
| | - Tannaz Masoumi
- Rajaie Cardiovascular Medical and Research CenterIran University of Medical SciencesTehranIran
| | - Alireza Biglari
- Department of Genetics & Molecular Medicine, School of MedicineZanjan University of Medical SciencesZanjanIran
| | - Majid Maleki
- Cardiogenetic Research Center, Rajaie Cardiovascular Medical and Research CenterIran University of Medical SciencesTehranIran
| | - Samira Kalayinia
- Cardiogenetic Research Center, Rajaie Cardiovascular Medical and Research CenterIran University of Medical SciencesTehranIran
| |
Collapse
|
18
|
Abrahamyan A, Eldstrom J, Sahakyan H, Karagulyan N, Mkrtchyan L, Karapetyan T, Sargsyan E, Kneussel M, Nazaryan K, Schwarz JR, Fedida D, Vardanyan V. Mechanism of external K+ sensitivity of KCNQ1 channels. J Gen Physiol 2023; 155:213880. [PMID: 36809486 PMCID: PMC9960071 DOI: 10.1085/jgp.202213205] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 12/20/2022] [Accepted: 01/31/2023] [Indexed: 02/23/2023] Open
Abstract
KCNQ1 voltage-gated K+ channels are involved in a wide variety of fundamental physiological processes and exhibit the unique feature of being markedly inhibited by external K+. Despite the potential role of this regulatory mechanism in distinct physiological and pathological processes, its exact underpinnings are not well understood. In this study, using extensive mutagenesis, molecular dynamics simulations, and single-channel recordings, we delineate the molecular mechanism of KCNQ1 modulation by external K+. First, we demonstrate the involvement of the selectivity filter in the external K+ sensitivity of the channel. Then, we show that external K+ binds to the vacant outermost ion coordination site of the selectivity filter inducing a diminution in the unitary conductance of the channel. The larger reduction in the unitary conductance compared to whole-cell currents suggests an additional modulatory effect of external K+ on the channel. Further, we show that the external K+ sensitivity of the heteromeric KCNQ1/KCNE complexes depends on the type of associated KCNE subunits.
Collapse
Affiliation(s)
- Astghik Abrahamyan
- Molecular Neuroscience Group, Institute of Molecular Biology, National Academy of Sciences of the Republic of Armenia , Yerevan, Armenia
| | - Jodene Eldstrom
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia , Vancouver, BC, Canada
| | - Harutyun Sahakyan
- Laboratory of Computational Modeling of Biological Processes, Institute of Molecular Biology of National Academy of Sciences of the Republic of Armenia , Yerevan, Armenia
| | - Nare Karagulyan
- Molecular Neuroscience Group, Institute of Molecular Biology, National Academy of Sciences of the Republic of Armenia , Yerevan, Armenia
| | - Liana Mkrtchyan
- Molecular Neuroscience Group, Institute of Molecular Biology, National Academy of Sciences of the Republic of Armenia , Yerevan, Armenia
| | - Tatev Karapetyan
- Molecular Neuroscience Group, Institute of Molecular Biology, National Academy of Sciences of the Republic of Armenia , Yerevan, Armenia
| | - Ernest Sargsyan
- Molecular Neuroscience Group, Institute of Molecular Biology, National Academy of Sciences of the Republic of Armenia , Yerevan, Armenia
| | - Matthias Kneussel
- Institute for Molecular Neurogenetics, Center for Molecular Neurobiology Hamburg , Hamburg, Germany
| | - Karen Nazaryan
- Laboratory of Computational Modeling of Biological Processes, Institute of Molecular Biology of National Academy of Sciences of the Republic of Armenia , Yerevan, Armenia
| | - Jürgen R Schwarz
- Institute for Molecular Neurogenetics, Center for Molecular Neurobiology Hamburg , Hamburg, Germany
| | - David Fedida
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia , Vancouver, BC, Canada
| | - Vitya Vardanyan
- Molecular Neuroscience Group, Institute of Molecular Biology, National Academy of Sciences of the Republic of Armenia , Yerevan, Armenia
| |
Collapse
|
19
|
Kenworthy AK. The building blocks of caveolae revealed: caveolins finally take center stage. Biochem Soc Trans 2023; 51:855-869. [PMID: 37082988 PMCID: PMC10212548 DOI: 10.1042/bst20221298] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 04/07/2023] [Accepted: 04/14/2023] [Indexed: 04/22/2023]
Abstract
The ability of cells to divide, migrate, relay signals, sense mechanical stimuli, and respond to stress all rely on nanoscale invaginations of the plasma membrane known as caveolae. The caveolins, a family of monotopic membrane proteins, form the inner layer of the caveolar coat. Caveolins have long been implicated in the generation of membrane curvature, in addition to serving as scaffolds for signaling proteins. Until recently, however, the molecular architecture of caveolins was unknown, making it impossible to understand how they operate at a mechanistic level. Over the past year, two independent lines of evidence - experimental and computational - have now converged to provide the first-ever glimpse into the structure of the oligomeric caveolin complexes that function as the building blocks of caveolae. Here, we summarize how these discoveries are transforming our understanding of this long-enigmatic protein family and their role in caveolae assembly and function. We present new models inspired by the structure for how caveolins oligomerize, remodel membranes, interact with their binding partners, and reorganize when mutated. Finally, we discuss emerging insights into structural differences among caveolin family members that enable them to support the proper functions of diverse tissues and organisms.
Collapse
Affiliation(s)
- Anne K. Kenworthy
- Center for Membrane and Cell Physiology, University of Virginia, Charlottesville, VA, U.S.A
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, VA, U.S.A
| |
Collapse
|
20
|
Cava F, Micolonghi C, Musumeci MB, Petrucci S, Savio C, Fabiani M, Tini G, Germani A, Libi F, Rossi C, Visco V, Pizzuti A, Volpe M, Autore C, Rubattu S, Piane M. Long QTc in hypertrophic cardiomyopathy: A consequence of structural myocardial damage or a distinct genetic disease? Front Cardiovasc Med 2023; 10:1112759. [PMID: 37089884 PMCID: PMC10113437 DOI: 10.3389/fcvm.2023.1112759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 03/01/2023] [Indexed: 04/08/2023] Open
Abstract
Hypertrophic cardiomyopathy (HCM) is an autosomal dominant disease, characterized by the presence of unexplained left ventricular hypertrophy. This condition is often associated with electrocardiographic abnormalities including QTc prolongation occurring in 13% of patients. The main explanation for prolonged QTc in HCM is myocardial hypertrophy and the related structural damage. However, other mechanisms, including long QT syndrome (LQTS) genes mutations, may be involved. In the present study we explored the hypothesis of a distinct genetic basis underlying QTc prolongation in HCM by investigating the potential co-inheritance of pathogenic gene variants associated with LQTS and HCM. For this purpose, starting from a cohort of 150 HCM patients carrying pathogenic variants in sarcomere genes, we selected 25 patients carrying a QTc prolongation unexplained by any other cause. The QTc was considered prolonged if greater than 450 ms in males and greater than 470 ms in females. The NGS analysis was performed with Illumina TrueSight Cardio panel genes on Illumina MiniSeq platform. We identified pathogenic/likely pathogenic variants in the KCNQ1 in two patients (c.1781G > A, p. Arg594Gln; c.532G > A, p. Ala178Thr) (8%). Variants of uncertain significance were identified in SCN5A, KCNJ5, AKAP9 and ANK2 in four patients (16%). Although the results are limited by the small number of patients included in the study, they highlight a minor contribution of LQTS genes for QTc prolongation in HCM patients. The screening for ion channel genes mutations may be considered in HCM patients with prolonged QTc unexplained by any other cause. This in-depth molecular diagnosis may contribute to improve risk stratification and treatment planning.
Collapse
Affiliation(s)
- Francesco Cava
- Department of Clinical and Molecular Medicine, Sapienza University, Rome, Italy
| | - Caterina Micolonghi
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
- Sant'Andrea University Hospital, Rome, Italy
| | - Maria Beatrice Musumeci
- Department of Clinical and Molecular Medicine, Sapienza University, Rome, Italy
- Correspondence: Maria Beatrice Musumeci
| | - Simona Petrucci
- Department of Clinical and Molecular Medicine, Sapienza University, Rome, Italy
| | | | - Marco Fabiani
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - Giacomo Tini
- Department of Clinical and Molecular Medicine, Sapienza University, Rome, Italy
| | - Aldo Germani
- Department of Clinical and Molecular Medicine, Sapienza University, Rome, Italy
| | - Fabio Libi
- Sant'Andrea University Hospital, Rome, Italy
| | - Carla Rossi
- Sant'Andrea University Hospital, Rome, Italy
| | - Vincenzo Visco
- Department of Clinical and Molecular Medicine, Sapienza University, Rome, Italy
| | - Antonio Pizzuti
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
- Casa Sollievo Della Sofferenza Foundation, San Giovanni Rotondo, Italy
| | - Massimo Volpe
- Department of Clinical and Molecular Medicine, Sapienza University, Rome, Italy
- IRCCS S.Raffaele, Rome, Italy
| | | | - Speranza Rubattu
- Department of Clinical and Molecular Medicine, Sapienza University, Rome, Italy
- IRCCS Neuromed, Pozzilli, Italy
| | - Maria Piane
- Department of Clinical and Molecular Medicine, Sapienza University, Rome, Italy
- Sant'Andrea University Hospital, Rome, Italy
| |
Collapse
|
21
|
Erlandsdotter LM, Giammarino L, Halili A, Nikesjö J, Gréen H, Odening KE, Liin SI. Long-QT mutations in KCNE1 modulate the 17β-estradiol response of Kv7.1/KCNE1. SCIENCE ADVANCES 2023; 9:eade7109. [PMID: 36921038 PMCID: PMC10017040 DOI: 10.1126/sciadv.ade7109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 02/13/2023] [Indexed: 06/18/2023]
Abstract
Estradiol (17[Formula: see text]-E2) is implicated in higher arrhythmia risk of women with congenital or acquired long-QT syndrome (LQTS) compared to men. However, the underlying mechanisms remain poorly understood, and little is known about the impact of LQTS-associated mutations. We show that 17[Formula: see text]-E2 inhibits the human cardiac Kv7.1/KCNE1 channel expressed in Xenopus oocytes. We find that the 17[Formula: see text]-E2 effect depends on the Kv7.1 to KCNE1 stoichiometry, and we reveal a critical function of the KCNE1 carboxyl terminus for the effect. LQTS-associated mutations in the KCNE1 carboxyl terminus show a range of responses to 17[Formula: see text]-E2, from a wild-type like response to impaired or abolished response. Together, this study increases our understanding of the mechanistic basis for 17[Formula: see text]-E2 inhibition of Kv7.1/KCNE1 and demonstrates mutation-dependent responses to 17[Formula: see text]-E2. These findings suggest that the 17[Formula: see text]-E2 effect on Kv7.1/KCNE1 might contribute to the higher arrhythmia risk of women, particularly in carriers with specific LQTS-associated mutations.
Collapse
Affiliation(s)
| | - Lucilla Giammarino
- Translational Cardiology, Department of Cardiology, Inselspital, University Hospital Bern and Department of Physiology, University of Bern, Bern, Switzerland
| | - Azemine Halili
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Johan Nikesjö
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Henrik Gréen
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
- Department of Forensic Genetics and Forensic Toxicology, National Board of Forensic Medicine, Linköping, Sweden
| | - Katja E. Odening
- Translational Cardiology, Department of Cardiology, Inselspital, University Hospital Bern and Department of Physiology, University of Bern, Bern, Switzerland
| | - Sara I. Liin
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| |
Collapse
|
22
|
Kongmeneck AD, Kasimova MA, Tarek M. Modulation of the IKS channel by PIP2 requires two binding sites per monomer. BBA ADVANCES 2023; 3:100073. [PMID: 37082259 PMCID: PMC10074941 DOI: 10.1016/j.bbadva.2023.100073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The phosphatidyl-inositol-4,5-bisphosphate (PIP2) lipid has been shown to be crucial for the coupling between the voltage sensor and the pore of the potassium voltage-gated KV7 channel family, especially the KV7.1 channel. Expressed in the myocardium membrane, KV7.1 forms a complex with KCNE1 auxiliary subunits to generate the IKS current. Here we present molecular models of the transmembrane region of this complex in its three known states, namely the Resting/Closed (RC), the Intermediate/Closed (IC), and the Activated/Open (AO), robustness of which is assessed by agreement with a range of biophysical data. Molecular Dynamics (MD) simulations of these models embedded in a lipid bilayer including phosphatidyl-inositol-4,5-bisphosphate (PIP2) lipids show that in presence of KCNE1, two PIP2 lipids are necessary to stabilize each state. The simulations also show that KCNE1 interacts with both PIP2 binding sites, forming a tourniquet around the pore and preventing its opening. The present investigation provides therefore key molecular elements that govern the role of PIP2 in KCNE1 modulation of IKS channels, possibly a common mechanism by which auxiliary KCNE subunits might modulate a variety of other ion channels.
Collapse
|
23
|
Rogalska ME, Vafiadaki E, Erpapazoglou Z, Haghighi K, Green L, Mantzoros CS, Hajjar RJ, Tranter M, Karakikes I, Kranias EG, Stillitano F, Kafasla P, Sanoudou D. Isoform changes of action potential regulators in the ventricles of arrhythmogenic phospholamban-R14del humanized mouse hearts. Metabolism 2023; 138:155344. [PMID: 36375644 DOI: 10.1016/j.metabol.2022.155344] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 10/30/2022] [Accepted: 11/01/2022] [Indexed: 11/13/2022]
Abstract
Arrhythmogenic cardiomyopathy (ACM) is characterized by life-threatening ventricular arrhythmias and sudden cardiac death and affects hundreds of thousands of patients worldwide. The deletion of Arginine 14 (p.R14del) in the phospholamban (PLN) gene has been implicated in the pathogenesis of ACM. PLN is a key regulator of sarcoplasmic reticulum (SR) Ca2+ cycling and cardiac contractility. Despite global gene and protein expression studies, the molecular mechanisms of PLN-R14del ACM pathogenesis remain unclear. Using a humanized PLN-R14del mouse model and human induced pluripotent stem cell derived cardiomyocytes (iPSC-CMs), we investigated the transcriptome-wide mRNA splicing changes associated with the R14del mutation. We identified >200 significant alternative splicing (AS) events and distinct AS profiles were observed in the right (RV) and left (LV) ventricles in PLN-R14del compared to WT mouse hearts. Enrichment analysis of the AS events showed that the most affected biological process was associated with "cardiac cell action potential", specifically in the RV. We found that splicing of 2 key genes, Trpm4 and Camk2d, which encode proteins regulating calcium homeostasis in the heart, were altered in PLN-R14del mouse hearts and human iPSC-CMs. Bioinformatical analysis pointed to the tissue-specific splicing factors Srrm4 and Nova1 as likely upstream regulators of the observed splicing changes in the PLN-R14del cardiomyocytes. Our findings suggest that aberrant splicing may affect Ca2+-homeostasis in the heart, contributing to the increased risk of arrythmogenesis in PLN-R14del ACM.
Collapse
Affiliation(s)
- Malgorzata E Rogalska
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona 08003, Spain
| | - Elizabeth Vafiadaki
- Molecular Biology Division, Biomedical Research Foundation of the Academy of Athens, 11527 Athens, Greece
| | - Zoi Erpapazoglou
- Institute for Fundamental Biomedical Research, B.S.R.C. "Alexander Fleming", 16672 Athens, Greece
| | - Kobra Haghighi
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
| | - Lisa Green
- Department of Medicine, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
| | - Christos S Mantzoros
- Division of Endocrinology, Diabetes and Metabolism, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA; Section of Endocrinology, Boston VA Healthcare System, Harvard Medical School, Boston, MA 02215, USA
| | | | - Michael Tranter
- Department of Medicine, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
| | - Ioannis Karakikes
- Department of Cardiothoracic Surgery and Cardiovascular Institute, Stanford University School of Medicine, 240 Pasteur Dr, Stanford, CA 94304, USA
| | - Evangelia G Kranias
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
| | - Francesca Stillitano
- Division Heart and Lung, Department of Cardiology, University Medical Center Utrecht, 3584, CX, Utrecht, the Netherlands
| | - Panagiota Kafasla
- Institute for Fundamental Biomedical Research, B.S.R.C. "Alexander Fleming", 16672 Athens, Greece
| | - Despina Sanoudou
- Molecular Biology Division, Biomedical Research Foundation of the Academy of Athens, 11527 Athens, Greece; Clinical Genomics and Pharmacogenomics Unit, 4(th) Department of Internal Medicine, Attikon Hospital, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece; Center for New Biotechnologies and Precision Medicine, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece.
| |
Collapse
|
24
|
Kwofie SK, Annan DG, Adinortey CA, Boison D, Kwarko GB, Abban RA, Adinortey MB. Identification of novel potential inhibitors of varicella-zoster virus thymidine kinase from ethnopharmacologic relevant plants through an in-silico approach. J Biomol Struct Dyn 2022; 40:12932-12947. [PMID: 34533095 DOI: 10.1080/07391102.2021.1977700] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Although Varicella or chickenpox infection which is caused by the varicella-zoster virus (VZV) has significantly been managed through vaccination, it remains an infection that poses threats to the nearest future due to therapeutic drawbacks. The focus of this research was geared towards in silico screening for the identification of novel compounds in plants of ethnopharmacological relevance in the treatment of chicken pox in West Africa. The work evaluated 65 compounds reported to be present in Achillea millefolium, Psidium guajava and Vitex doniana sweet to identify potential inhibitors of thymidine kinase, the primary drug target of varicella zoster virus. Out of the 65 compounds docked, 42 of these compounds were observed to possess binding energies lower than -7.0 kcal/mol, however only 20 were observed to form hydrogen bond interactions with the protein. These interactions were elucidated using LigPlot+ and MM-PBSA analysis with residue Ala134 predicted as critical for binding. Pharmacological profiling predicted three potential lead compounds comprising myricetin, apigenin- 4' -glucoside and Abyssinone V to possess good pharmacodynamics properties and negligibly toxic. The molecules were predicted as antivirals including anti-herpes and involved in mechanisms comprising inhibition of polymerase, ATPase and membrane integrity, which were corroborated previously in other viruses. These drug-like compounds are plausible biotherapeutic moieties for further biochemical and cell-based assaying to discover their potential for use against chickenpox. Communicated by Ramaswamy H. Sarma.
Collapse
Affiliation(s)
- Samuel Kojo Kwofie
- Department of Biomedical Engineering, School of Engineering Sciences, College of Basic and Applied Sciences, University of Ghana, Accra, Ghana.,West African Centre for Cell Biology of Infectious Pathogens, Department of Biochemistry, Cell and Molecular Biology, College of Basic and Applied Sciences, University of Ghana, Accra, Ghana
| | - Dorothy Gyamfua Annan
- West African Centre for Cell Biology of Infectious Pathogens, Department of Biochemistry, Cell and Molecular Biology, College of Basic and Applied Sciences, University of Ghana, Accra, Ghana
| | - Cynthia Ayefoumi Adinortey
- Department of Molecular Biology and Biotechnology, School of Biological Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Daniel Boison
- Department of Biochemistry, School of Biological Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Gabriel Brako Kwarko
- West African Centre for Cell Biology of Infectious Pathogens, Department of Biochemistry, Cell and Molecular Biology, College of Basic and Applied Sciences, University of Ghana, Accra, Ghana
| | - Rachel Araba Abban
- West African Centre for Cell Biology of Infectious Pathogens, Department of Biochemistry, Cell and Molecular Biology, College of Basic and Applied Sciences, University of Ghana, Accra, Ghana
| | - Michael Buenor Adinortey
- Department of Biochemistry, School of Biological Sciences, University of Cape Coast, Cape Coast, Ghana
| |
Collapse
|
25
|
Yamamoto H, Itamoto C, Hayashi M, Kohno T, Yagihara N. SCN5A p.P1725L variant that showed ventricular fibrillation and recurrent pericarditis, and a family member with sick sinus syndrome. INTERNATIONAL JOURNAL OF ARRHYTHMIA 2022. [DOI: 10.1186/s42444-022-00077-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Abstract
Background
In Brugada syndrome (BrS), the arrhythmogenic substrate is suggested to be located in the epicardial surface of the right ventricle outflow tract. Postmortem examinations of BrS described epicardial and interstitial fibrosis, the causes of which remain unclear.
Case presentation
We present a family in whom the proband is a case of aborted sudden cardiac death from ventricular fibrillation (VF) without spontaneous Brugada-type electrocardiogram, and his mother underwent pacemaker implantation due to sick sinus syndrome. The proband showed recurrent acute pericarditis two consecutive years before the VF episode. These events occurred twice in mid-spring, the same season when the lethal arrhythmia occurred.
Conclusions
This case suggests a possibility in the pathogenesis of epicardial fibrosis of BrS that the RVOT lesions induced by SCN5A mutations have not only fibrotic characteristics but also in some patients, inflammatory characteristics which may be manifested as repeated mild pericarditis or occult pericarditis.
Collapse
|
26
|
Krey I, Johannesen KM, Kohnen O, Lemke JR. Genetic testing in adults with developmental and epileptic encephalopathy - what do we know? MED GENET-BERLIN 2022; 34:207-213. [PMID: 38835877 PMCID: PMC11006368 DOI: 10.1515/medgen-2022-2144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
Knowledge of underlying genetic causes of developmental and epileptic encephalopathies (DEE) in adults is still limited when compared to the routine diagnostic approach in similarly affected children. A well-documented longitudinal study of adults with DEE is of utmost importance to understand the natural history of the respective entity. This information is of great value especially for genetic counselling of newly diagnosed children with identical genetic diagnoses and may impact treatment and management of affected individuals. In our meta-analysis we provide an overview of the most recurrent genetic findings across an adult DEE cohort (n = 1 , 020 ). The gene mostly associated with a pathogenic or likely pathogenic variant in adult DEE is SCN1A, followed by MECP2 and CHD2. Studies employing exome sequencing and calling of both single nucleotide variants and copy number variants are associated with diagnostic yields of almost 50 %. Finally, we highlight three remarkable cases, each representing the oldest individual ever published with their genetic diagnosis, i. e., Angelman syndrome, Miller-Dieker syndrome, and CAMK2A-related disorder, and describe lessons learned from each of these adults.
Collapse
Affiliation(s)
- Ilona Krey
- Institute of Human Genetics, University of Leipzig Medical Center, Philipp-Rosenthal-Straße 55, 04103 Leipzig, Germany
| | - Kathrine M Johannesen
- Department of Epilepsy Genetics and Personalized Medicine, The Danish Epilepsy Centre, Dianalund, Denmark
- Department of Regional Health Research, University of Southern Denmark, Odense, Denmark
| | - Oona Kohnen
- Swiss Epilepsy Center, Klinik Lengg, Zurich, Switzerland
| | - Johannes R Lemke
- Institute of Human Genetics, University of Leipzig Medical Center, Philipp-Rosenthal-Straße 55, 04103 Leipzig, Germany
- Center for Rare Diseases, University of Leipzig Medical Center, Leipzig, Germany
| |
Collapse
|
27
|
Radnahad N, Ehrlinder H, Leander K, Engdahl J, Wallén H, Gigante B. Is the association of QTc with atrial fibrillation and stroke in cohort studies a matter of time? Open Heart 2022; 9:openhrt-2022-002080. [PMID: 36171000 PMCID: PMC9528598 DOI: 10.1136/openhrt-2022-002080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Accepted: 09/12/2022] [Indexed: 11/16/2022] Open
Abstract
Objectives To investigate the association of the heart rate-corrected QT interval (QTc) with the risk of atrial fibrillation (AF) and ischaemic stroke. Methods We estimated the risk of AF and ischaemic stroke associated with QTc duration (ms) by Cox regression in study participants from the cohort of 60-year-old men and women from Stockholm (60YO) (n=4232). Univariate and multivariate adjusted risk estimates were expressed as HR and 95% CI. Main results were validated in elderly patients with AF, included in the Carebbean-e study, where an ECG in sinus rhythm (SR) (ECG-SR) recorded before the ECG diagnostic for (ECG-AF) was available (n=803). We estimated the correlation between the time interval (years) between the ECG-SR and ECG-AF with the QTc duration, by the Spearman correlation coefficient (rho). Results In the 60YO, the highest QTc duration quartile (>427 ms) associated with the AF risk (n=435) with a multivariable adjusted HR of 1.68 and 95% CI (1.26 to 2.24). No association was observed with ischaemic stroke. In the Carebbean-e study, no significant association was observed between the QTc duration measured on the ECG-SR and risk of ischaemic stroke during follow-up. QTc duration showed an inverse correlation (rho: −0.26, p<0.0001) with the time interval intercurred between ECG-SR and ECG-AF. Conclusions The association of QTc duration with AF risk might depend on the time interval between the QTc measurement and the clinical diagnosis of AF. No association was observed between QTc duration and ischaemic stroke.
Collapse
Affiliation(s)
- Navid Radnahad
- Department of Clinical Sciences, Division of Cardiovascular Medicine, Danderyd University Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Hanne Ehrlinder
- Department of Clinical Sciences, Division of Cardiovascular Medicine, Danderyd University Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Karin Leander
- Unit of Cardiovascular and Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Johan Engdahl
- Department of Clinical Sciences, Division of Cardiovascular Medicine, Danderyd University Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Håkan Wallén
- Department of Clinical Sciences, Division of Cardiovascular Medicine, Danderyd University Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Bruna Gigante
- Department of Clinical Sciences, Division of Cardiovascular Medicine, Danderyd University Hospital, Karolinska Institutet, Stockholm, Sweden .,Division of Cardiovascular Medicine, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| |
Collapse
|
28
|
Zhuang J, Chen C, Wang Y, Zeng S, Chen Y, Jiang Y, Xie Y, Wang G. Case Report: Prenatal Whole-Exome Sequencing Identified a Novel Nonsense Mutation of the KCNH2 Gene in a Fetus With Familial 2q14.2 Duplication. Front Genet 2022; 13:924573. [PMID: 35865016 PMCID: PMC9294376 DOI: 10.3389/fgene.2022.924573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 05/24/2022] [Indexed: 11/13/2022] Open
Abstract
Background: Pathogenic mutations in the KCNH2 gene were associated with long QT syndrome 2 (LQT2), which typically manifest in a prolonged QT interval and may lead to recurrent syncopes, seizure, or sudden death. Limited reports indicated that the KCNH2 mutations would result in LQT2 combined with tetralogy of fallot. Our goal was to present an additional case of LQT2 combined with the tetralogy of fallot in a fetus with a novel KCNH2 mutation.Case presentation: Enrolled in this study was a 23-year-old pregnant woman from Quanzhou Fujian province, China. In her pregnancy, fetal ultrasound anomalies were identified, including tetralogy of fallot, coronary sinus enlargement, and persistent left superior vena cava. No chromosomal abnormality was detected by fetal karyotype analysis. However, 238.1-kb duplication in the 2q14.2 region containing the GLI2 gene was observed in the fetus by chromosomal array analysis, which was inherited from the mother with normal clinical features and interpreted as a variant of uncertain significance (VOUS). Furthermore, whole-exome sequencing (WES) detection identified a novel nonsense c.1907C > G (p.S636*) mutation in the KCNH2 gene in the fetus, and it was classified as a likely pathogenic variant, according to the ACMG guidelines. Parental verification analysis indicated that c.1907C > G (p.S636*) mutation was inherited from the mother.Conclusion: In this study, we believe that 2q14.2 duplication may not be the reason for fetal heart defects; moreover, we described an additional case with KCNH2 gene mutation, which may lead to LQTS and be associated with congenital heart defects. In addition, our study further confirms the application value of the WES technology in prenatal genetic etiology diagnosis of fetuses with structural anomalies and unexplained structural variants.
Collapse
Affiliation(s)
- Jianlong Zhuang
- Prenatal Diagnosis Center, Quanzhou Women’s and Children’s Hospital, Quanzhou, China
| | - Chunnuan Chen
- Department of Neurology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Yuanbai Wang
- Prenatal Diagnosis Center, Quanzhou Women’s and Children’s Hospital, Quanzhou, China
| | - Shuhong Zeng
- Prenatal Diagnosis Center, Quanzhou Women’s and Children’s Hospital, Quanzhou, China
| | - Yu’e Chen
- Ultrasonography, Quanzhou Women’s and Children’s Hospital, Quanzhou, China
| | - Yuying Jiang
- Prenatal Diagnosis Center, Quanzhou Women’s and Children’s Hospital, Quanzhou, China
| | - Yingjun Xie
- Department of Obstetrics and Gynecology, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- *Correspondence: Gaoxiong Wang, ; Yingjun Xie,
| | - Gaoxiong Wang
- Quanzhou Women’s and Children’s Hospital, Quanzhou, China
- *Correspondence: Gaoxiong Wang, ; Yingjun Xie,
| |
Collapse
|
29
|
Moon RY, Carlin RF, Hand I. Evidence Base for 2022 Updated Recommendations for a Safe Infant Sleeping Environment to Reduce the Risk of Sleep-Related Infant Deaths. Pediatrics 2022; 150:188305. [PMID: 35921639 DOI: 10.1542/peds.2022-057991] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Every year in the United States, approximately 3500 infants die of sleep-related infant deaths, including sudden infant death syndrome (SIDS) (International Statistical Classification of Diseases and Related Health Problems 10th Revision [ICD-10] R95), ill-defined deaths (ICD-10 R99), and accidental suffocation and strangulation in bed (ICD-10 W75). After a substantial decline in sleep-related deaths in the 1990s, the overall death rate attributable to sleep-related infant deaths have remained stagnant since 2000, and disparities persist. The triple risk model proposes that SIDS occurs when an infant with intrinsic vulnerability (often manifested by impaired arousal, cardiorespiratory, and/or autonomic responses) undergoes an exogenous trigger event (eg, exposure to an unsafe sleeping environment) during a critical developmental period. The American Academy of Pediatrics recommends a safe sleep environment to reduce the risk of all sleep-related deaths. This includes supine positioning; use of a firm, noninclined sleep surface; room sharing without bed sharing; and avoidance of soft bedding and overheating. Additional recommendations for SIDS risk reduction include human milk feeding; avoidance of exposure to nicotine, alcohol, marijuana, opioids, and illicit drugs; routine immunization; and use of a pacifier. New recommendations are presented regarding noninclined sleep surfaces, short-term emergency sleep locations, use of cardboard boxes as a sleep location, bed sharing, substance use, home cardiorespiratory monitors, and tummy time. In addition, additional information to assist parents, physicians, and nonphysician clinicians in assessing the risk of specific bed-sharing situations is included. The recommendations and strength of evidence for each recommendation are published in the accompanying policy statement, which is included in this issue.
Collapse
Affiliation(s)
- Rachel Y Moon
- Department of Pediatrics, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Rebecca F Carlin
- Division of Pediatric Critical Care and Hospital Medicine, Department of Pediatrics, Columbia University Irving Medical Center, NewYork-Presbyterian Hospital, New York City, New York
| | - Ivan Hand
- Department of Pediatrics, SUNY-Downstate College of Medicine, NYC Health + Hospitals, Kings County, Brooklyn, New York
| | | |
Collapse
|
30
|
Boßelmann CM, Hedrich UBS, Müller P, Sonnenberg L, Parthasarathy S, Helbig I, Lerche H, Pfeifer N. Predicting the functional effects of voltage-gated potassium channel missense variants with multi-task learning. EBioMedicine 2022; 81:104115. [PMID: 35759918 PMCID: PMC9250003 DOI: 10.1016/j.ebiom.2022.104115] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 05/30/2022] [Accepted: 05/31/2022] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND Variants in genes encoding voltage-gated potassium channels are associated with a broad spectrum of neurological diseases including epilepsy, ataxia, and intellectual disability. Knowledge of the resulting functional changes, characterized as overall ion channel gain- or loss-of-function, is essential to guide clinical management including precision medicine therapies. However, for an increasing number of variants, little to no experimental data is available. New tools are needed to evaluate variant functional effects. METHODS We catalogued a comprehensive dataset of 959 functional experiments across 19 voltage-gated potassium channels, leveraging data from 782 unique disease-associated and synthetic variants. We used these data to train a taxonomy-based multi-task learning support vector machine (MTL-SVM), and compared performance to several baseline methods. FINDINGS MTL-SVM maintains channel family structure during model training, improving overall predictive performance (mean balanced accuracy 0·718 ± 0·041, AU-ROC 0·761 ± 0·063) over baseline (mean balanced accuracy 0·620 ± 0·045, AU-ROC 0·711 ± 0·022). We can obtain meaningful predictions even for channels with few known variants (KCNC1, KCNQ5). INTERPRETATION Our model enables functional variant prediction for voltage-gated potassium channels. It may assist in tailoring current and future precision therapies for the increasing number of patients with ion channel disorders. FUNDING This work was supported by intramural funding of the Medical Faculty, University of Tuebingen (PATE F.1315137.1), the Federal Ministry for Education and Research (Treat-ION, 01GM1907A/B/G/H) and the German Research Foundation (FOR-2715, Le1030/16-2, He8155/1-2).
Collapse
Affiliation(s)
- Christian Malte Boßelmann
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tuebingen, Hoppe-Seyler-Str. 3, D-72076 Tuebingen, Germany; Methods in Medical Informatics, Department of Computer Science, University of Tuebingen, Sand 14, D-72076 Tuebingen, Germany
| | - Ulrike B S Hedrich
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tuebingen, Hoppe-Seyler-Str. 3, D-72076 Tuebingen, Germany
| | - Peter Müller
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tuebingen, Hoppe-Seyler-Str. 3, D-72076 Tuebingen, Germany
| | - Lukas Sonnenberg
- Institute for Neurobiology, University of Tuebingen, Tuebingen, Germany
| | - Shridhar Parthasarathy
- Division of Neurology, Children's Hospital of Philadelphia, Philadelphia, PA, USA; The Epilepsy NeuroGenetics Initiative (ENGIN), Children's Hospital of Philadelphia, Philadelphia, PA, USA; Department of Biomedical and Health Informatics (DBHi), Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Ingo Helbig
- Division of Neurology, Children's Hospital of Philadelphia, Philadelphia, PA, USA; The Epilepsy NeuroGenetics Initiative (ENGIN), Children's Hospital of Philadelphia, Philadelphia, PA, USA; Department of Biomedical and Health Informatics (DBHi), Children's Hospital of Philadelphia, Philadelphia, PA, USA; Department of Neurology, University of Pennsylvania, Philadelphia, PA, USA
| | - Holger Lerche
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tuebingen, Hoppe-Seyler-Str. 3, D-72076 Tuebingen, Germany.
| | - Nico Pfeifer
- Methods in Medical Informatics, Department of Computer Science, University of Tuebingen, Sand 14, D-72076 Tuebingen, Germany; Interfaculty Institute for Biomedical Informatics (IBMI), University of Tuebingen, Tuebingen, Germany; Faculty of Medicine, University of Tuebingen, Tuebingen, Germany; German Center for Infection Research, Partner Site Tuebingen, Tuebingen, Germany.
| |
Collapse
|
31
|
Schauperl M, Denny RA. AI-Based Protein Structure Prediction in Drug Discovery: Impacts and Challenges. J Chem Inf Model 2022; 62:3142-3156. [PMID: 35727311 DOI: 10.1021/acs.jcim.2c00026] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Proteins are the molecular machinery of the human body, and their malfunctioning is often responsible for diseases, making them crucial targets for drug discovery. The three-dimensional structure of a protein determines its biological function, its conformational state determines substrates, cofactors, and protein binding. Rational drug discovery employs engineered small molecules to selectively interact with proteins to modulate their function. To selectively target a protein and to design small molecules, knowing the protein structure with all its specific conformation is critical. Unfortunately, for a large number of proteins relevant for drug discovery, the three-dimensional structure has not yet been experimentally solved. Therefore, accurately predicting their structure based on their amino acid sequence is one of the grant challenges in biology. Recently, AlphaFold2, a machine learning application based on a deep neural network, was able to predict unknown structures of proteins with an unprecedented accuracy. Despite the impressive progress made by AlphaFold2, nature still challenges the field of structure prediction. In this Perspective, we explore how AlphaFold2 and related methods help make drug design more efficient. Furthermore, we discuss the roles of predicting domain-domain orientations, all relevant conformational states, the influence of posttranslational modifications, and conformational changes due to protein binding partners. We highlight where further improvements are needed for advanced machine learning methods to be successfully and frequently used in the pharmaceutical industry.
Collapse
Affiliation(s)
- Michael Schauperl
- Department of Computational Sciences HotSpot Therapeutics 50 Milk Street, Boston, Massachusetts 02110, United States
| | - Rajiah Aldrin Denny
- Department of Computational Sciences HotSpot Therapeutics 50 Milk Street, Boston, Massachusetts 02110, United States
| |
Collapse
|
32
|
Charalambous C, Moon JC, Holly JMP, Chaturvedi N, Hughes AD, Captur G. Declining Levels and Bioavailability of IGF-I in Cardiovascular Aging Associate With QT Prolongation-Results From the 1946 British Birth Cohort. Front Cardiovasc Med 2022; 9:863988. [PMID: 35528832 PMCID: PMC9072634 DOI: 10.3389/fcvm.2022.863988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 03/21/2022] [Indexed: 11/30/2022] Open
Abstract
Background As people age, circulating levels of insulin-like growth factors (IGFs) and IGF binding protein 3 (IGFBP-3) decline. In rat cardiomyocytes, IGF-I has been shown to regulate sarcolemmal potassium channel activity and late sodium current thus impacting cardiac repolarization and the heart rate-corrected QT (QTc). However, the relationship between IGFs and IGFBP-3 with the QTc interval in humans, is unknown. Objectives To examine the association of IGFs and IGFBP-3 with QTc interval in an older age population-based cohort. Methods Participants were from the 1946 Medical Research Council (MRC) National Survey of Health and Development (NSHD) British birth cohort. Biomarkers from blood samples at age 53 and 60-64 years (y, exposures) included IGF-I/II, IGFBP-3, IGF-I/IGFBP-3 ratio and the change (Δ) in marker levels between the 60-64 and 53y sampled timepoints. QTc (outcome) was recorded from electrocardiograms at the 60-64y timepoint. Generalized linear multivariable models with adjustments for relevant demographic and clinical factors, were used for complete-cases and repeated after multiple imputation. Results One thousand four hundred forty-eight participants were included (48.3% men; QTc mean 414 ms interquartile range 26 ms). Univariate analysis revealed an association between low IGF-I and IGF-I/IGFBP-3 ratio at 60-64y with QTc prolongation [respectively: β -0.30 ms/nmol/L, (95% confidence intervals -0.44, -0.17), p < 0.001; β-28.9 ms/unit (-41.93, -15.50), p < 0.001], but not with IGF-II or IGFBP-3. No association with QTc was found for IGF biomarkers sampled at 53y, however both ΔIGF-I and ΔIGF-I/IGFBP-3 ratio were negatively associated with QTc [β -0.04 ms/nmol/L (-0.08, -0.008), p = 0.019; β -2.44 ms/unit (-4.17, -0.67), p = 0.007] while ΔIGF-II and ΔIGFBP-3 showed no association. In fully adjusted complete case and imputed models (reporting latter) low IGF-I and IGF-I/IGFBP-3 ratio at 60-64y [β -0.21 ms/nmol/L (-0.39, -0.04), p = 0.017; β -20.14 ms/unit (-36.28, -3.99), p = 0.015], steeper decline in ΔIGF-I [β -0.05 ms/nmol/L/10 years (-0.10, -0.002), p = 0.042] and shallower rise in ΔIGF-I/IGFBP-3 ratio over a decade [β -2.16 ms/unit/10 years (-4.23, -0.09), p = 0.041], were all independently associated with QTc prolongation. Independent associations with QTc were also confirmed for other previously known covariates: female sex [β 9.65 ms (6.65, 12.65), p < 0.001], increased left ventricular mass [β 0.04 ms/g (0.02, 0.06), p < 0.001] and blood potassium levels [β -5.70 ms/mmol/L (-10.23, -1.18) p = 0.014]. Conclusion Over a decade, in an older age population-based cohort, declining levels and bioavailability of IGF-I associate with prolongation of the QTc interval. As QTc prolongation associates with increased risk for sudden death even in apparently healthy people, further research into the antiarrhythmic effects of IGF-I on cardiomyocytes is warranted.
Collapse
Affiliation(s)
- Christos Charalambous
- UCL MRC Unit for Lifelong Health and Ageing, University College London, London, United Kingdom
| | - James C. Moon
- UCL Institute of Cardiovascular Science, University College London, London, United Kingdom
- Cardiac MRI Unit, Barts Heart Centre, London, United Kingdom
| | - Jeff M. P. Holly
- National Institute for Health Research (NIHR) Bristol Nutrition Biomedical Research Unit, Level 3, University Hospitals Bristol Education and Research Centre, Bristol, United Kingdom
- Faculty of Health Sciences, School of Translational Health Sciences, Bristol Medical School, Southmead Hospital, University of Bristol, Bristol, United Kingdom
| | - Nishi Chaturvedi
- UCL MRC Unit for Lifelong Health and Ageing, University College London, London, United Kingdom
| | - Alun D. Hughes
- UCL MRC Unit for Lifelong Health and Ageing, University College London, London, United Kingdom
- UCL Institute of Cardiovascular Science, University College London, London, United Kingdom
| | - Gabriella Captur
- UCL MRC Unit for Lifelong Health and Ageing, University College London, London, United Kingdom
- UCL Institute of Cardiovascular Science, University College London, London, United Kingdom
- Cardiology Department, Centre for Inherited Heart Muscle Conditions, The Royal Free Hospital, London, United Kingdom
| |
Collapse
|
33
|
A benzodiazepine activator locks K v7.1 channels open by electro-mechanical uncoupling. Commun Biol 2022; 5:301. [PMID: 35365746 PMCID: PMC8976019 DOI: 10.1038/s42003-022-03229-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 02/22/2022] [Indexed: 01/18/2023] Open
Abstract
Loss-of-function mutations in Kv7.1 often lead to long QT syndrome (LQTS), a cardiac repolarization disorder associated with arrhythmia and subsequent sudden cardiac death. The discovery of agonistic IKs modulators may offer a new potential strategy in pharmacological treatment of this disorder. The benzodiazepine derivative (R)-L3 potently activates Kv7.1 channels and shortens action potential duration, thus may represent a starting point for drug development. However, the molecular mechanisms underlying modulation by (R)-L3 are still unknown. By combining alanine scanning mutagenesis, non-canonical amino acid incorporation, voltage-clamp electrophysiology and fluorometry, and in silico protein modelling, we show that (R)-L3 not only stimulates currents by allosteric modulation of the pore domain but also alters the kinetics independently from the pore domain effects. We identify novel (R)-L3-interacting key residues in the lower S4-segment of Kv7.1 and observed an uncoupling of the outer S4 segment with the inner S5, S6 and selectivity filter segments.
Collapse
|
34
|
Qiao L, Fan X, Yang Z, El-Battrawy I, Zhou X, Akin I. Glucose Counteracts Isoprenaline Effects on Ion Channel Functions in Human-Induced Pluripotent Stem Cell-Derived Cardiomyocytes. J Cardiovasc Dev Dis 2022; 9:jcdd9030076. [PMID: 35323624 PMCID: PMC8955312 DOI: 10.3390/jcdd9030076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 03/01/2022] [Accepted: 03/02/2022] [Indexed: 02/01/2023] Open
Abstract
Recent studies indicate that the disorder of glucose metabolism in myocardial tissue is involved in the development of Takotsubo syndrome (TTS). This study investigated the effects of a high level of glucose on the pathogenesis of TTS, focusing on the electrophysiological mechanisms. Human-induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) were treated with toxic concentration of isoprenaline (Iso, 1 mM) and a high level of glucose (22 mM) to mimic the setting of TTS and diabetes mellitus (DM). Iso prolonged action potential duration (APD) through enhancing the late sodium channel current and suppressing the transient outward potassium current (Ito). However, a high level of glucose prevented the APD prolongation and the change in Ito. High-level glucose reduced the expression levels of PI3K/Akt, β1-adrenoceptors, Gs-protein, and PKA, suggesting their involvement in the protective effects of high-level glucose against toxic effects of catecholamine. High glucose level did not influence Iso-induced ROS-generation, suggesting that the protective effects of high-level glucose against Iso did not result from changes in ROS generation. High-level glucose may protect cardiomyocytes from the toxic effects of catecholamine excess through suppressing β1-adrenoceptor-Gs-PKA signaling. DM may reduce the risk for occurrence of arrhythmias due to QT prolongation in TTS patients.
Collapse
Affiliation(s)
- Lin Qiao
- Department of Cardiology, Angiology, Haemostaseology and Medical Intensive Care, Medical Faculty Mannheim, University Medical Centre Mannheim (UMM), University of Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany; (L.Q.); (X.F.); (Z.Y.); (I.E.-B.); (I.A.)
| | - Xuehui Fan
- Department of Cardiology, Angiology, Haemostaseology and Medical Intensive Care, Medical Faculty Mannheim, University Medical Centre Mannheim (UMM), University of Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany; (L.Q.); (X.F.); (Z.Y.); (I.E.-B.); (I.A.)
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention of Cardiovascular Diseases, Institute of Cardiovascular Research, Southwest Medical University, Luzhou 646000, China
- European Center for AngioScience (ECAS) and German Center for Cardiovascular Research (DZHK) Partner Site Heidelberg/Mannheim, 68167 Mannheim, Germany
| | - Zhen Yang
- Department of Cardiology, Angiology, Haemostaseology and Medical Intensive Care, Medical Faculty Mannheim, University Medical Centre Mannheim (UMM), University of Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany; (L.Q.); (X.F.); (Z.Y.); (I.E.-B.); (I.A.)
| | - Ibrahim El-Battrawy
- Department of Cardiology, Angiology, Haemostaseology and Medical Intensive Care, Medical Faculty Mannheim, University Medical Centre Mannheim (UMM), University of Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany; (L.Q.); (X.F.); (Z.Y.); (I.E.-B.); (I.A.)
- European Center for AngioScience (ECAS) and German Center for Cardiovascular Research (DZHK) Partner Site Heidelberg/Mannheim, 68167 Mannheim, Germany
| | - Xiaobo Zhou
- Department of Cardiology, Angiology, Haemostaseology and Medical Intensive Care, Medical Faculty Mannheim, University Medical Centre Mannheim (UMM), University of Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany; (L.Q.); (X.F.); (Z.Y.); (I.E.-B.); (I.A.)
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention of Cardiovascular Diseases, Institute of Cardiovascular Research, Southwest Medical University, Luzhou 646000, China
- European Center for AngioScience (ECAS) and German Center for Cardiovascular Research (DZHK) Partner Site Heidelberg/Mannheim, 68167 Mannheim, Germany
- Correspondence: ; Tel.: +49-621-383-1448; Fax: +49-621-383-1474
| | - Ibrahim Akin
- Department of Cardiology, Angiology, Haemostaseology and Medical Intensive Care, Medical Faculty Mannheim, University Medical Centre Mannheim (UMM), University of Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany; (L.Q.); (X.F.); (Z.Y.); (I.E.-B.); (I.A.)
- European Center for AngioScience (ECAS) and German Center for Cardiovascular Research (DZHK) Partner Site Heidelberg/Mannheim, 68167 Mannheim, Germany
| |
Collapse
|
35
|
McKnight D, Bristow SL, Truty RM, Morales A, Stetler M, Westbrook MJ, Robinson K, Riethmaier D, Borlot F, Kellogg M, Hwang ST, Berg A, Aradhya S. Multigene Panel Testing in a Large Cohort of Adults With Epilepsy: Diagnostic Yield and Clinically Actionable Genetic Findings. Neurol Genet 2022; 8:e650. [PMID: 34926809 PMCID: PMC8678910 DOI: 10.1212/nxg.0000000000000650] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 11/04/2021] [Indexed: 12/20/2022]
Abstract
BACKGROUND AND OBJECTIVES Although genetic testing among children with epilepsy has demonstrated clinical utility and become a part of routine testing, studies in adults are limited. This study reports the diagnostic yield of genetic testing in adults with epilepsy. METHODS Unrelated individuals aged 18 years and older who underwent diagnostic genetic testing for epilepsy using a comprehensive, next-generation sequencing-based, targeted gene panel (range 89-189 genes) were included in this cross-sectional study. Clinical information, provided at the discretion of the ordering clinician, was reviewed and analyzed. Diagnostic yield was calculated for all individuals including by age at seizure onset and comorbidities based on clinician-reported information. The proportion of individuals with clinically actionable genetic findings, including instances when a specific treatment would be indicated or contraindicated due to a diagnostic finding, was calculated. RESULTS Among 2,008 individuals, a diagnostic finding was returned for 218 adults (10.9%), with clinically actionable findings in 55.5% of diagnoses. The highest diagnostic yield was in adults with seizure onset during infancy (29.6%, 0-1 year), followed by in early childhood (13.6%, 2-4 years), late childhood (7.0%, 5-10 years), adolescence (2.4%, 11-17 years), and adulthood (3.7%, ≥18 years). Comorbid intellectual disability (ID) or developmental delay resulted in a high diagnostic yield (16.0%), most notably for females (19.6% in females vs 12.3% in males). Among individuals with pharmacoresistant epilepsy, 13.5% had a diagnostic finding, and of these, 57.4% were clinically actionable genetic findings. DISCUSSION These data reinforce the utility of genetic testing for adults with epilepsy, particularly for those with childhood-onset seizures, ID, and pharmacoresistance. This is an important consideration due to longer survival and the complexity of the transition from pediatric to adult care. In addition, more than half of diagnostic findings in this study were considered clinically actionable, suggesting that genetic testing could have a direct impact on clinical management and outcomes.
Collapse
Affiliation(s)
- Dianalee McKnight
- From the Invitae (D.M., S.L.B., R.M.T., A.M., M.S., M.J.W., K.R., D.R., S.A.), San Francisco, CA; Alberta Children's Hospital Research Institute, Cumming School of Medicine, (F.B.) University of Calgary, Canada; Oregon Health & Science University Comprehensive Epilepsy Center (M.K.); Department of Neurology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell (S.T.H); Epilepsy Center, Ann & Robert H. Lurie Children's Hospital of Chicago (A.B.); and Department of Neurology, Northwestern University-Feinberg School of Medicine (A.B.), Chicago, IL
| | - Sara L. Bristow
- From the Invitae (D.M., S.L.B., R.M.T., A.M., M.S., M.J.W., K.R., D.R., S.A.), San Francisco, CA; Alberta Children's Hospital Research Institute, Cumming School of Medicine, (F.B.) University of Calgary, Canada; Oregon Health & Science University Comprehensive Epilepsy Center (M.K.); Department of Neurology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell (S.T.H); Epilepsy Center, Ann & Robert H. Lurie Children's Hospital of Chicago (A.B.); and Department of Neurology, Northwestern University-Feinberg School of Medicine (A.B.), Chicago, IL
| | - Rebecca M. Truty
- From the Invitae (D.M., S.L.B., R.M.T., A.M., M.S., M.J.W., K.R., D.R., S.A.), San Francisco, CA; Alberta Children's Hospital Research Institute, Cumming School of Medicine, (F.B.) University of Calgary, Canada; Oregon Health & Science University Comprehensive Epilepsy Center (M.K.); Department of Neurology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell (S.T.H); Epilepsy Center, Ann & Robert H. Lurie Children's Hospital of Chicago (A.B.); and Department of Neurology, Northwestern University-Feinberg School of Medicine (A.B.), Chicago, IL
| | - Ana Morales
- From the Invitae (D.M., S.L.B., R.M.T., A.M., M.S., M.J.W., K.R., D.R., S.A.), San Francisco, CA; Alberta Children's Hospital Research Institute, Cumming School of Medicine, (F.B.) University of Calgary, Canada; Oregon Health & Science University Comprehensive Epilepsy Center (M.K.); Department of Neurology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell (S.T.H); Epilepsy Center, Ann & Robert H. Lurie Children's Hospital of Chicago (A.B.); and Department of Neurology, Northwestern University-Feinberg School of Medicine (A.B.), Chicago, IL
| | - Molly Stetler
- From the Invitae (D.M., S.L.B., R.M.T., A.M., M.S., M.J.W., K.R., D.R., S.A.), San Francisco, CA; Alberta Children's Hospital Research Institute, Cumming School of Medicine, (F.B.) University of Calgary, Canada; Oregon Health & Science University Comprehensive Epilepsy Center (M.K.); Department of Neurology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell (S.T.H); Epilepsy Center, Ann & Robert H. Lurie Children's Hospital of Chicago (A.B.); and Department of Neurology, Northwestern University-Feinberg School of Medicine (A.B.), Chicago, IL
| | - M. Jody Westbrook
- From the Invitae (D.M., S.L.B., R.M.T., A.M., M.S., M.J.W., K.R., D.R., S.A.), San Francisco, CA; Alberta Children's Hospital Research Institute, Cumming School of Medicine, (F.B.) University of Calgary, Canada; Oregon Health & Science University Comprehensive Epilepsy Center (M.K.); Department of Neurology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell (S.T.H); Epilepsy Center, Ann & Robert H. Lurie Children's Hospital of Chicago (A.B.); and Department of Neurology, Northwestern University-Feinberg School of Medicine (A.B.), Chicago, IL
| | - Kristina Robinson
- From the Invitae (D.M., S.L.B., R.M.T., A.M., M.S., M.J.W., K.R., D.R., S.A.), San Francisco, CA; Alberta Children's Hospital Research Institute, Cumming School of Medicine, (F.B.) University of Calgary, Canada; Oregon Health & Science University Comprehensive Epilepsy Center (M.K.); Department of Neurology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell (S.T.H); Epilepsy Center, Ann & Robert H. Lurie Children's Hospital of Chicago (A.B.); and Department of Neurology, Northwestern University-Feinberg School of Medicine (A.B.), Chicago, IL
| | - Darlene Riethmaier
- From the Invitae (D.M., S.L.B., R.M.T., A.M., M.S., M.J.W., K.R., D.R., S.A.), San Francisco, CA; Alberta Children's Hospital Research Institute, Cumming School of Medicine, (F.B.) University of Calgary, Canada; Oregon Health & Science University Comprehensive Epilepsy Center (M.K.); Department of Neurology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell (S.T.H); Epilepsy Center, Ann & Robert H. Lurie Children's Hospital of Chicago (A.B.); and Department of Neurology, Northwestern University-Feinberg School of Medicine (A.B.), Chicago, IL
| | - Felippe Borlot
- From the Invitae (D.M., S.L.B., R.M.T., A.M., M.S., M.J.W., K.R., D.R., S.A.), San Francisco, CA; Alberta Children's Hospital Research Institute, Cumming School of Medicine, (F.B.) University of Calgary, Canada; Oregon Health & Science University Comprehensive Epilepsy Center (M.K.); Department of Neurology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell (S.T.H); Epilepsy Center, Ann & Robert H. Lurie Children's Hospital of Chicago (A.B.); and Department of Neurology, Northwestern University-Feinberg School of Medicine (A.B.), Chicago, IL
| | - Marissa Kellogg
- From the Invitae (D.M., S.L.B., R.M.T., A.M., M.S., M.J.W., K.R., D.R., S.A.), San Francisco, CA; Alberta Children's Hospital Research Institute, Cumming School of Medicine, (F.B.) University of Calgary, Canada; Oregon Health & Science University Comprehensive Epilepsy Center (M.K.); Department of Neurology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell (S.T.H); Epilepsy Center, Ann & Robert H. Lurie Children's Hospital of Chicago (A.B.); and Department of Neurology, Northwestern University-Feinberg School of Medicine (A.B.), Chicago, IL
| | - Sean T. Hwang
- From the Invitae (D.M., S.L.B., R.M.T., A.M., M.S., M.J.W., K.R., D.R., S.A.), San Francisco, CA; Alberta Children's Hospital Research Institute, Cumming School of Medicine, (F.B.) University of Calgary, Canada; Oregon Health & Science University Comprehensive Epilepsy Center (M.K.); Department of Neurology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell (S.T.H); Epilepsy Center, Ann & Robert H. Lurie Children's Hospital of Chicago (A.B.); and Department of Neurology, Northwestern University-Feinberg School of Medicine (A.B.), Chicago, IL
| | - Anne Berg
- From the Invitae (D.M., S.L.B., R.M.T., A.M., M.S., M.J.W., K.R., D.R., S.A.), San Francisco, CA; Alberta Children's Hospital Research Institute, Cumming School of Medicine, (F.B.) University of Calgary, Canada; Oregon Health & Science University Comprehensive Epilepsy Center (M.K.); Department of Neurology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell (S.T.H); Epilepsy Center, Ann & Robert H. Lurie Children's Hospital of Chicago (A.B.); and Department of Neurology, Northwestern University-Feinberg School of Medicine (A.B.), Chicago, IL
| | - Swaroop Aradhya
- From the Invitae (D.M., S.L.B., R.M.T., A.M., M.S., M.J.W., K.R., D.R., S.A.), San Francisco, CA; Alberta Children's Hospital Research Institute, Cumming School of Medicine, (F.B.) University of Calgary, Canada; Oregon Health & Science University Comprehensive Epilepsy Center (M.K.); Department of Neurology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell (S.T.H); Epilepsy Center, Ann & Robert H. Lurie Children's Hospital of Chicago (A.B.); and Department of Neurology, Northwestern University-Feinberg School of Medicine (A.B.), Chicago, IL
| |
Collapse
|
36
|
Mettl3 deficiency leads to the upregulation of Cav1.2 and increases arrhythmia susceptibility in mice. Acta Biochim Biophys Sin (Shanghai) 2022; 54:199-208. [PMID: 35130614 PMCID: PMC9909299 DOI: 10.3724/abbs.2021025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Methyltransferase-like 3 (Mettl3) is a component of methyltransferase complex that mediates mA modification of RNAs, and participates in multiple biological processes. However, the role of Mettl3 in cardiac electrophysiology remains unknown. This study aims to explore the ventricular arrhythmia susceptibility of Mettl3 mice and the underlying mechanisms. Mice were anesthetized with 2% avertin (0.1 mL/ body weight) for echocardiography and programmed electrical pacing. Whole-cell patch clamp technique was used to examine the electrophysiological property of cardiomyocytes. The expression of Cav1.2 was determined by qRT-PCR and western blot analysis. The mA medication of mRNA was examined by MeRIP-Seq and MeRIP-qPCR. No differences are found in the morphology and function of the hearts between Mettl3 mice and wild-type (WT) controls. The QT and QTc intervals of Mettl3 mice are significantly longer. High-frequency electrical stimulation showed that heterozygous knockout of Mettl3 increases ventricular arrhythmia susceptibility. The whole-cell patch-clamp recordings showed that the APD is prolonged in Mettl3 ventricular myocytes and more EADs were observed. The density of is substantially increased in ventricular myocytes of Mettl3 mice. The pore-forming subunit of L-type calcium channel Cav1.2 is upregulated in Mettl3 mice, while the mRNA of its coding gene does not change. MeRIP-Seq and MeRIP-qPCR showed that the mA methylation of mRNA is decreased in cultured Mettl3-knockdown cardiomyocytes and Mettl3 hearts. Collectively, deficiency of Mettl3 increases ventricular arrhythmia susceptibility due to the upregulation of Cav1.2 by reducing mA modification onmRNA in mice. This study highlights the role of mA modification in the regulation of cardiac electrophysiology.
Collapse
|
37
|
Bharathi M, Medikeri S, Dharmarajan S, De K. Cochlear implantation in a case of jervell and lange-nielsen syndrome presenting with absence seizure and anemia. INDIAN JOURNAL OF OTOLOGY 2022. [DOI: 10.4103/indianjotol.indianjotol_167_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
38
|
Chen L, He Y, Wang X, Ge J, Li H. Ventricular voltage-gated ion channels: Detection, characteristics, mechanisms, and drug safety evaluation. Clin Transl Med 2021; 11:e530. [PMID: 34709746 PMCID: PMC8516344 DOI: 10.1002/ctm2.530] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 07/23/2021] [Accepted: 07/26/2021] [Indexed: 02/06/2023] Open
Abstract
Cardiac voltage-gated ion channels (VGICs) play critical roles in mediating cardiac electrophysiological signals, such as action potentials, to maintain normal heart excitability and contraction. Inherited or acquired alterations in the structure, expression, or function of VGICs, as well as VGIC-related side effects of pharmaceutical drug delivery can result in abnormal cellular electrophysiological processes that induce life-threatening cardiac arrhythmias or even sudden cardiac death. Hence, to reduce possible heart-related risks, VGICs must be acknowledged as important targets in drug discovery and safety studies related to cardiac disease. In this review, we first summarize the development and application of electrophysiological techniques that are employed in cardiac VGIC studies alone or in combination with other techniques such as cryoelectron microscopy, optical imaging and optogenetics. Subsequently, we describe the characteristics, structure, mechanisms, and functions of various well-studied VGICs in ventricular myocytes and analyze their roles in and contributions to both physiological cardiac excitability and inherited cardiac diseases. Finally, we address the implications of the structure and function of ventricular VGICs for drug safety evaluation. In summary, multidisciplinary studies on VGICs help researchers discover potential targets of VGICs and novel VGICs in heart, enrich their knowledge of the properties and functions, determine the operation mechanisms of pathological VGICs, and introduce groundbreaking trends in drug therapy strategies, and drug safety evaluation.
Collapse
Affiliation(s)
- Lulan Chen
- Department of Cardiology, Shanghai Institute of Cardiovascular DiseasesShanghai Xuhui District Central Hospital & Zhongshan‐xuhui Hospital, Zhongshan Hospital, Fudan UniversityShanghaiChina
| | - Yue He
- Department of CardiologyShanghai Xuhui District Central Hospital & Zhongshan‐xuhui HospitalShanghaiChina
| | - Xiangdong Wang
- Institute of Clinical Science, Zhongshan HospitalFudan UniversityShanghaiChina
| | - Junbo Ge
- Department of Cardiology, Shanghai Institute of Cardiovascular DiseasesShanghai Xuhui District Central Hospital & Zhongshan‐xuhui Hospital, Zhongshan Hospital, Fudan UniversityShanghaiChina
| | - Hua Li
- Department of Cardiology, Shanghai Institute of Cardiovascular DiseasesShanghai Xuhui District Central Hospital & Zhongshan‐xuhui Hospital, Zhongshan Hospital, Fudan UniversityShanghaiChina
| |
Collapse
|
39
|
Kaboua K, Mouzou A, Pakoussi T, Assih M, Chatelier A, Diallo A, Bois P, Bescond J. Hydrocotyle bonariensis Comm ex Lamm (Araliaceae) leaves extract inhibits IKs not IKr potassium currents: Potential implications for anti-arrhythmic therapy. J Tradit Complement Med 2021; 12:330-334. [PMID: 35747353 PMCID: PMC9209821 DOI: 10.1016/j.jtcme.2021.09.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 09/10/2021] [Accepted: 09/13/2021] [Indexed: 11/18/2022] Open
Affiliation(s)
- Komla Kaboua
- Laboratoire de Physiologie-Pharmacologie, FDS, Université de Lomé, BP 1515, Lomé, Togo
| | - Aklesso Mouzou
- Laboratoire de Physiologie-Pharmacologie, FDS, Université de Lomé, BP 1515, Lomé, Togo
| | - Tcha Pakoussi
- Laboratoire de Physiologie-Pharmacologie, FDS, Université de Lomé, BP 1515, Lomé, Togo
| | - Mindede Assih
- Laboratoire de Physiologie-Pharmacologie, FDS, Université de Lomé, BP 1515, Lomé, Togo
| | - Aurelien Chatelier
- Laboratoire de Signalisation et Transport Ionique Membranaire, Pole Biosanté, Université de Poitiers, BP 86000, Poitiers, France
| | - Aboudoulatifou Diallo
- Laboratoire de Pharmacologie-toxicologie, FSS, Université de Lomé, BP 1515, Lomé, Togo
| | - Patrick Bois
- Laboratoire de Signalisation et Transport Ionique Membranaire, Pole Biosanté, Université de Poitiers, BP 86000, Poitiers, France
- Corresponding author. Equipe Transferts Ioniques et Rythmicité Cardiaque (TIRC) Laboratoire Signalisation et Transports Ioniques Membranaires (STIM) EA7349 Université de Poitiers, UFR SFA Pôle Biologie Santé, Bâtiment B36/B37 1, Rue Georges Bonnet, TSA 51106, 86073, POITIERS Cedex 9, France.
| | - Jocelyn Bescond
- Laboratoire de Signalisation et Transport Ionique Membranaire, Pole Biosanté, Université de Poitiers, BP 86000, Poitiers, France
| |
Collapse
|
40
|
Ramzan S, Tennstedt S, Tariq M, Khan S, Noor Ul Ayan H, Ali A, Munz M, Thiele H, Korejo AA, Mughal AR, Jamal SZ, Nürnberg P, Baig SM, Erdmann J, Ahmad I. A Novel Missense Mutation in TNNI3K Causes Recessively Inherited Cardiac Conduction Disease in a Consanguineous Pakistani Family. Genes (Basel) 2021; 12:genes12081282. [PMID: 34440456 PMCID: PMC8395014 DOI: 10.3390/genes12081282] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 08/15/2021] [Accepted: 08/16/2021] [Indexed: 11/16/2022] Open
Abstract
Cardiac conduction disease (CCD), which causes altered electrical impulse propagation in the heart, is a life-threatening condition with high morbidity and mortality. It exhibits genetic and clinical heterogeneity with diverse pathomechanisms, but in most cases, it disrupts the synchronous activity of impulse-generating nodes and impulse-conduction underlying the normal heartbeat. In this study, we investigated a consanguineous Pakistani family comprised of four patients with CCD. We applied whole exome sequencing (WES) and co-segregation analysis, which identified a novel homozygous missense mutation (c.1531T>C;(p.Ser511Pro)) in the highly conserved kinase domain of the cardiac troponin I-interacting kinase (TNNI3K) encoding gene. The behaviors of mutant and native TNNI3K were compared by performing all-atom long-term molecular dynamics simulations, which revealed changes at the protein surface and in the hydrogen bond network. Furthermore, intra and intermolecular interaction analyses revealed that p.Ser511Pro causes structural variation in the ATP-binding pocket and the homodimer interface. These findings suggest p.Ser511Pro to be a pathogenic variant. Our study provides insights into how the variant perturbs the TNNI3K structure-function relationship, leading to a disease state. This is the first report of a recessive mutation in TNNI3K and the first mutation in this gene identified in the Pakistani population.
Collapse
Affiliation(s)
- Shafaq Ramzan
- Institute for Cardiogenetics, University of Lübeck, 23562 Lübeck, Germany; (S.R.); (S.T.); (H.N.U.A.); (M.M.); (J.E.)
- National Institute for Biotechnology and Genetic Engineering (NIBGE-C), Institute of Engineering and Applied Sciences (PIEAS), Islamabad 44000, Pakistan; (M.T.); (S.K.); (A.A.); (S.M.B.)
| | - Stephanie Tennstedt
- Institute for Cardiogenetics, University of Lübeck, 23562 Lübeck, Germany; (S.R.); (S.T.); (H.N.U.A.); (M.M.); (J.E.)
- DZHK (German Research Centre for Cardiovascular Research) Partner Site Hamburg/Lübeck/Kiel, 23562 Lübeck, Germany
- University Heart Center Lübeck, 23562 Lübeck, Germany
| | - Muhammad Tariq
- National Institute for Biotechnology and Genetic Engineering (NIBGE-C), Institute of Engineering and Applied Sciences (PIEAS), Islamabad 44000, Pakistan; (M.T.); (S.K.); (A.A.); (S.M.B.)
| | - Sheraz Khan
- National Institute for Biotechnology and Genetic Engineering (NIBGE-C), Institute of Engineering and Applied Sciences (PIEAS), Islamabad 44000, Pakistan; (M.T.); (S.K.); (A.A.); (S.M.B.)
| | - Hafiza Noor Ul Ayan
- Institute for Cardiogenetics, University of Lübeck, 23562 Lübeck, Germany; (S.R.); (S.T.); (H.N.U.A.); (M.M.); (J.E.)
- National Institute for Biotechnology and Genetic Engineering (NIBGE-C), Institute of Engineering and Applied Sciences (PIEAS), Islamabad 44000, Pakistan; (M.T.); (S.K.); (A.A.); (S.M.B.)
| | - Aamir Ali
- National Institute for Biotechnology and Genetic Engineering (NIBGE-C), Institute of Engineering and Applied Sciences (PIEAS), Islamabad 44000, Pakistan; (M.T.); (S.K.); (A.A.); (S.M.B.)
| | - Matthias Munz
- Institute for Cardiogenetics, University of Lübeck, 23562 Lübeck, Germany; (S.R.); (S.T.); (H.N.U.A.); (M.M.); (J.E.)
- DZHK (German Research Centre for Cardiovascular Research) Partner Site Hamburg/Lübeck/Kiel, 23562 Lübeck, Germany
| | - Holger Thiele
- Cologne Center for Genomics (CCG), University of Cologne, Faculty of Medicine, University Hospital Cologne, 50931 Cologne, Germany; (H.T.); (P.N.)
| | - Asad Aslam Korejo
- National Institute of Cardiovascular Disease, Karachi 75510, Pakistan; (A.A.K.); (S.Z.J.)
| | | | - Syed Zahid Jamal
- National Institute of Cardiovascular Disease, Karachi 75510, Pakistan; (A.A.K.); (S.Z.J.)
| | - Peter Nürnberg
- Cologne Center for Genomics (CCG), University of Cologne, Faculty of Medicine, University Hospital Cologne, 50931 Cologne, Germany; (H.T.); (P.N.)
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Faculty of Medicine, University Hospital Cologne, 50931 Cologne, Germany
| | - Shahid Mahmood Baig
- National Institute for Biotechnology and Genetic Engineering (NIBGE-C), Institute of Engineering and Applied Sciences (PIEAS), Islamabad 44000, Pakistan; (M.T.); (S.K.); (A.A.); (S.M.B.)
- Department of Biological and Biomedical Sciences, Aga Khan University, Karachi 74000, Pakistan
- Pakistan Science Foundation (PSF), 1-Constitution Avenue, G-5/2, Islamabad 44000, Pakistan
| | - Jeanette Erdmann
- Institute for Cardiogenetics, University of Lübeck, 23562 Lübeck, Germany; (S.R.); (S.T.); (H.N.U.A.); (M.M.); (J.E.)
- DZHK (German Research Centre for Cardiovascular Research) Partner Site Hamburg/Lübeck/Kiel, 23562 Lübeck, Germany
- University Heart Center Lübeck, 23562 Lübeck, Germany
| | - Ilyas Ahmad
- Institute for Cardiogenetics, University of Lübeck, 23562 Lübeck, Germany; (S.R.); (S.T.); (H.N.U.A.); (M.M.); (J.E.)
- DZHK (German Research Centre for Cardiovascular Research) Partner Site Hamburg/Lübeck/Kiel, 23562 Lübeck, Germany
- University Heart Center Lübeck, 23562 Lübeck, Germany
- Correspondence: ; Tel.: +49-(0)451-3101-8320
| |
Collapse
|
41
|
Cartwright JH, Aziz Q, Harmer SC, Thayyil S, Tinker A, Munroe PB. Genetic variants in TRPM7 associated with unexplained stillbirth modify ion channel function. Hum Mol Genet 2021; 29:1797-1807. [PMID: 31423533 PMCID: PMC7372550 DOI: 10.1093/hmg/ddz198] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 07/31/2019] [Accepted: 08/06/2019] [Indexed: 11/15/2022] Open
Abstract
Stillbirth is the loss of a fetus after 22 weeks of gestation, of which almost half go completely unexplained despite post-mortem. We recently sequenced 35 arrhythmia-associated genes from 70 unexplained stillbirth cases. Our hypothesis was that deleterious mutations in channelopathy genes may have a functional effect in utero that may be pro-arrhythmic in the developing fetus. We observed four heterozygous, nonsynonymous variants in transient receptor potential melastatin 7 (TRPM7), a ubiquitously expressed ion channel known to regulate cardiac development and repolarization in mice. We used site-directed mutagenesis and single-cell patch-clamp to analyze the functional effect of the four stillbirth mutants on TRPM7 ion channel function in heterologous cells. We also used cardiomyocytes derived from human pluripotent stem cells to model the contribution of TRPM7 to action potential morphology. Our results show that two TRPM7 variants, p.G179V and p.T860M, lead to a marked reduction in ion channel conductance. This observation was underpinned by a lack of measurable TRPM7 protein expression, which in the case of p.T860M was due to rapid proteasomal degradation. We also report that human hiPSC-derived cardiomyocytes possess measurable TRPM7 currents; however, siRNA knockdown did not directly affect action potential morphology. TRPM7 variants found in the unexplained stillbirth population adversely affect ion channel function and this may precipitate fatal arrhythmia in utero.
Collapse
Affiliation(s)
- James H Cartwright
- Clinical Pharmacology, William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK
| | - Qadeer Aziz
- Clinical Pharmacology, William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK
| | - Stephen C Harmer
- Clinical Pharmacology, William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK.,School of Physiology, Pharmacology and Neuroscience, Faculty of Life Sciences, The University of Bristol, Biomedical Sciences Building, University Walk, Bristol BS8 1TD, UK
| | - Sudhin Thayyil
- Centre for Perinatal Neuroscience, Imperial College London, London W12OHS, UK
| | - Andrew Tinker
- Clinical Pharmacology, William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK
| | - Patricia B Munroe
- Clinical Pharmacology, William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK
| |
Collapse
|
42
|
Abstract
The physiological heart function is controlled by a well-orchestrated interplay of different ion channels conducting Na+, Ca2+ and K+. Cardiac K+ channels are key players of cardiac repolarization counteracting depolarizating Na+ and Ca2+ currents. In contrast to Na+ and Ca2+, K+ is conducted by many different channels that differ in activation/deactivation kinetics as well as in their contribution to different phases of the action potential. Together with modulatory subunits these K+ channel α-subunits provide a wide range of repolarizing currents with specific characteristics. Moreover, due to expression differences, K+ channels strongly influence the time course of the action potentials in different heart regions. On the other hand, the variety of different K+ channels increase the number of possible disease-causing mutations. Up to now, a plethora of gain- as well as loss-of-function mutations in K+ channel forming or modulating proteins are known that cause severe congenital cardiac diseases like the long-QT-syndrome, the short-QT-syndrome, the Brugada syndrome and/or different types of atrial tachyarrhythmias. In this chapter we provide a comprehensive overview of different K+ channels in cardiac physiology and pathophysiology.
Collapse
|
43
|
The role of QT-prolonging medications in a forensic autopsy study from Western Denmark. Forensic Sci Int 2021; 325:110889. [PMID: 34225211 DOI: 10.1016/j.forsciint.2021.110889] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 06/22/2021] [Accepted: 06/23/2021] [Indexed: 12/22/2022]
Abstract
Medication-induced prolongation of the QT-interval (miQTP) can lead to cardiac arrhythmia. Our aim was to investigate the prevalence of forensic autopsy cases where fatal cardiac arrhythmia related to treatment with QT-prolonging medications (QT-PMs) could be suspected. We performed a cross-sectional study of 741 forensic autopsies undertaken at our institution in non-drug addicts aged 15 years or above from 2017 to 2019. We defined a high risk of miQTP by one detected QT-PM in a concentration above therapeutic level, or two or more detected QT-PMs in post mortem blood. We reviewed the autopsy reports from cases with a high miQTP-risk to identify cases with no other apparent cause of death. We discarded suicides and cases with lethal levels of QT-PMs. We identified 167 cases (22.5%) with high risk of miQTP, and discarded 36 suicides (4.9%) and 7 (0.9%) with lethal levels of QT-PMs. Apart from a high risk of miQTP, no other apparent explanation of the cause of death was present in seven (0.9%). In 18 cases (2.4%) with high miQTP-risk, the cause of death was primarily attributed to cardiac changes other than acute cardiovascular events. In conclusion, 22.5% had a high risk of miQTP, and fatal cardiac arrhythmia related to treatment with QT-PMs could be suspected in 0.9%. However, a genetic pro-arrhythmic background could not be excluded in our study. Furthermore, it is possible that QT-PMs could have played a role in some of the 2.4% of cases where the cause of death was mainly attributed to cardiac changes and the risk of miQTP was high.
Collapse
|
44
|
Naffaa MM, Al-Ewaidat OA. Ligand modulation of KCNQ-encoded (K V7) potassium channels in the heart and nervous system. Eur J Pharmacol 2021; 906:174278. [PMID: 34174270 DOI: 10.1016/j.ejphar.2021.174278] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 06/06/2021] [Accepted: 06/18/2021] [Indexed: 10/21/2022]
Abstract
KCNQ-encoded (KV7) potassium channels are diversely distributed in the human tissues, associated with many physiological processes and pathophysiological conditions. These channels are increasingly used as drug targets for treating diseases. More selective and potent molecules on various types of the KV7 channels are desirable for appropriate therapies. The recent knowledge of the structure and function of human KCNQ-encoded channels makes it more feasible to achieve these goals. This review discusses the role and mechanism of action of many molecules in modulating the function of the KCNQ-encoded potassium channels in the heart and nervous system. The effects of these compounds on KV7 channels help to understand their involvement in many diseases, and to search for more selective and potent ligands to be used in the treatment of many disorders such as various types of cardiac arrhythmias, epilepsy, and pain.
Collapse
Affiliation(s)
- Moawiah M Naffaa
- Department of Cell Biology, Duke University School of Medicine, Durham, NC, 27710, USA; Department of Psychology and Neuroscience, Duke University, Durham, NC 27708, USA.
| | - Ola A Al-Ewaidat
- Faculty of Medicine, The University of Jordan, Amman, 11942, Jordan
| |
Collapse
|
45
|
Jenewein T, Kanner SA, Bauer D, Hertel B, Colecraft HM, Moroni A, Thiel G, Kauferstein S. The mutation L69P in the PAS domain of the hERG potassium channel results in LQTS by trafficking deficiency. Channels (Austin) 2021; 14:163-174. [PMID: 32253972 PMCID: PMC7188350 DOI: 10.1080/19336950.2020.1751522] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The congenital long QT syndrome (LQTS) is a cardiac disorder characterized by a prolonged QT interval on the electrocardiogram and an increased susceptibility to ventricular arrhythmias and sudden cardiac death. A frequent cause for LQTS is mutations in the KCNH2 gene (also known as the human ether-a-go-go-related gene or hERG), which reduce or modulate the potassium current IKr and hence alter cardiac repolarization. In a patient with a clinically diagnosed LQTS, we identified the mutation L69P in the N-terminal PAS (Per-Arnt-Sim) domain of hERG. Functional expression in HEK293 cells shows that a homotetrameric hERG channel reconstituted with only mutant subunits exhibits a drastically reduced surface expression of the channel protein thus leading to a diminished hERG current. Unlike many other mutations in the hERG-PAS domain the negative impact of the L69P substitution cannot be rescued by facilitated protein folding at a lower incubation temperature. Further, co-expression of wt and mutant monomers does not restore either wt like surface expression or the full hERG current. These results indicate L69P is a dominant negative mutation, with deficits which most likely occurs at the level of protein folding and subsequently inhibits trafficking to the plasma membrane. The functional deficits of the mutant channel support the clinical diagnosis of a LQTS.
Collapse
Affiliation(s)
- Tina Jenewein
- Institute of Legal Medicine, University of Frankfurt, Frankfurt Am Main, Germany
| | - Scott A Kanner
- Department of Physiology and Cellular Biophysics, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Daniel Bauer
- Computational Biology and Simulation Group, Department of Biology, Technische Universita ̈t Darmstadt, Darmstadt, Germany
| | - Brigitte Hertel
- Department of Biology, Technische Universität Darmstadt, Darmstadt, Germany
| | - Henry M Colecraft
- Department of Physiology and Cellular Biophysics, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Anna Moroni
- Department of Biosciences and CNR IBF-Mi, University of Milano, Milano, Italy
| | - Gerhard Thiel
- Department of Biology, Technische Universität Darmstadt, Darmstadt, Germany
| | - Silke Kauferstein
- Institute of Legal Medicine, University of Frankfurt, Frankfurt Am Main, Germany
| |
Collapse
|
46
|
Saleh MA, El-Badry MA, R Ezz Eldin R. Novel 6-hydroxyquinolinone derivatives: Design, synthesis, antimicrobial evaluation, in silico study and toxicity profiling. J Comput Chem 2021; 42:1561-1578. [PMID: 34041765 DOI: 10.1002/jcc.26693] [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: 03/09/2021] [Accepted: 05/09/2021] [Indexed: 11/07/2022]
Abstract
Infectious diseases of bacteria and fungi have become a major risk to public health because of antibiotic and antifungal resistance. However, the availability of effective antibacterial and antifungal agents is becoming increasingly limited with growing resistance to existing drugs. In response to that, novel agents are critically needed to overcome such resistance. A new series of 6-hydroxyquinolinone 3, 4, 5a, 5b, 6a and 6b bearing different side chains were synthesized and evaluated as antimicrobials against numbers of bacteria and fungi, using inhibition zone technique. As one of these derivatives, compound 3 was identified as a potent antibacterial and antifungal agent against all tested microorganisms with good minimum inhibitory concentration values comparable to reference drugs. Molecular docking studies were performed on antibacterial and antifungal targets; microbial DNA gyrase B of Staphylococcus aureus (PDB ID: 4URO); N-myristoyltransferase of Candida albicans (PDB ID: 1IYK), respectively, to predict the most probable type of interaction at the active site of the target protein in addition to binding affinities and orientations of docked ligands. Additionally, in silico prediction in terms of detailed physicochemical ADME and toxicity profile relating drug-likeness as well as medicinal chemistry friendliness was performed to all synthesized compounds. The results indicated that a novel 4,6-dihydroxyquinolin-2(1H)-one (3) is likely to be a newly synthesized drug candidate, indicating low toxicity in addition to good in silico absorption. In order to pave the way for more logical production of such compounds, structure-activity and toxicity relationships are also discussed.
Collapse
Affiliation(s)
- Marwa A Saleh
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy (Girls), Al-Azhar University, Cairo, Egypt
| | - Mohamed A El-Badry
- Department of Botany and Microbiology, Faculty of Science (Boys), Al-Azhar University, Cairo, Egypt
| | - Rogy R Ezz Eldin
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Port Said University, Port Said, Egypt
| |
Collapse
|
47
|
Ahmad S, Waheed Y, Ismail S, Najmi MH, Ansari JK. Rational design of potent anti-COVID-19 main protease drugs: An extensive multi-spectrum in silico approach. J Mol Liq 2021; 330:115636. [PMID: 33612899 PMCID: PMC7879066 DOI: 10.1016/j.molliq.2021.115636] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 02/02/2021] [Accepted: 02/08/2021] [Indexed: 02/07/2023]
Abstract
The emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) as a novel coronavirus and the etiological agent of global pandemic coronavirus disease (COVID-19) requires quick development of potential therapeutic strategies. Computer aided drug design approaches are highly efficient in identifying promising drug candidates among an available pool of biological active antivirals with safe pharmacokinetics. The main protease (MPro) enzyme of SARS-CoV-2 is considered key in virus production and its crystal structures are available at excellent resolution. This marks the enzyme as a good starting receptor to conduct an extensive structure-based virtual screening (SBVS) of ASINEX antiviral library for the purpose of uncovering valuable hits against SARS-CoV-2 MPro. A compound hit (BBB_26580140) was stand out in the screening process, as opposed to the control, as a potential inhibitor of SARS-CoV-2 MPro based on a combined approach of SBVS, drug likeness and lead likeness annotations, pharmacokinetics, molecular dynamics (MD) simulations, and end point MM-PBSA binding free energy methods. The lead was further used in ligand-based similarity search (LBSS) that found 33 similar compounds from the ChEMBL database. A set of three compounds (SCHEMBL12616233, SCHEMBL18616095, and SCHEMBL20148701), based on their binding affinity for MPro, was selected and analyzed using extensive MD simulation, hydrogen bond profiling, MM-PBSA, and WaterSwap binding free energy techniques. The compounds conformation with MPro show good stability after initial within active cavity moves, a rich intermolecular network of chemical interactions, and reliable relative and absolute binding free energies. Findings of the study suggested the use of BBB_26580140 lead and its similar analogs to be explored in vivo which might pave the path for rational drug discovery against SARS-CoV-2 MPro.
Collapse
Affiliation(s)
- Sajjad Ahmad
- Foundation University Medical College, Foundation University Islamabad, Islambad, Pakistan
| | - Yasir Waheed
- Foundation University Medical College, Foundation University Islamabad, Islambad, Pakistan
| | - Saba Ismail
- Foundation University Medical College, Foundation University Islamabad, Islambad, Pakistan
| | - Muzammil Hasan Najmi
- Foundation University Medical College, Foundation University Islamabad, Islambad, Pakistan
| | - Jawad Khaliq Ansari
- Foundation University Medical College, Foundation University Islamabad, Islambad, Pakistan
| |
Collapse
|
48
|
Linani A, Benarous K, Bou-Salah L, Yousfi M. Hispidin, Harmaline, and Harmine as potent inhibitors of bovine xanthine oxidase: Gout treatment, in vitro, ADMET prediction, and SAR studies. Bioorg Chem 2021; 112:104937. [PMID: 33932770 DOI: 10.1016/j.bioorg.2021.104937] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 03/18/2021] [Accepted: 04/19/2021] [Indexed: 01/20/2023]
Abstract
Alkaloids and phenols are potent inhibitors family for many enzymes used in many therapies. We aim to evaluate in vitro and in silico, the inhibition effect of Hispidin, Harmaline, and Harmine as pure molecules to bovine milk xanthine oxidase (BXO), Molecular docking and SAR study with GOLD was done to explain the mechanism of action related to its inhibition, ADMET parameters were checked to confirm their pharmacokinetics (PK) using preADMET 2.0 server, we classified our inhibitors by applying five drug-likeness rules, the best-ranked inhibitors were chosen based on the approved ADMET properties, drug-likeness qualifications, and the best PLPchem score generated by GOLD. The in vitro results show important inhibition activity to BXO comparing to the control with an IC50 of 39.72 ± 3.60 µM, 51.00 ± 1.0 µM, and 48.52 ± 1.76 µM for Hispidin, Harmaline, and Harmine respectively. The in silico results show that Hispidin was the best inhibitor model with approved ADMET properties and qualification in all drug-likeness rules; Harmaline was saved second-best model to BXO with suitable ADMET properties and qualified in most drug-likeness rules. Eventually, Harmine was ranked third potent inhibitor model with acceptable ADMET properties, drug-likeness rules, and PLPchem score. The tested inhibitors could be significant in drug discovery, especially in treating gout disease; therefore, drug development, including clinical trials, should be done with promising results.
Collapse
Affiliation(s)
- Abderahmane Linani
- Fundamental Sciences Laboratory, Amar Telidji University, Ghardaïa Road BP37G (03000), Laghouat, Algeria.
| | - Khedidja Benarous
- Fundamental Sciences Laboratory, Amar Telidji University, Ghardaïa Road BP37G (03000), Laghouat, Algeria; Biology Department, Amar Telidji University, Laghouat, Algeria
| | - Leila Bou-Salah
- Fundamental Sciences Laboratory, Amar Telidji University, Ghardaïa Road BP37G (03000), Laghouat, Algeria
| | - Mohamed Yousfi
- Fundamental Sciences Laboratory, Amar Telidji University, Ghardaïa Road BP37G (03000), Laghouat, Algeria
| |
Collapse
|
49
|
Li Q, Liang P, Wang S, Li W, Wang J, Yang Y, An X, Chen J, Zha D. A novel KCNQ4 gene variant (c.857A>G; p.Tyr286Cys) in an extended family with non‑syndromic deafness 2A. Mol Med Rep 2021; 23:420. [PMID: 33846771 PMCID: PMC8025472 DOI: 10.3892/mmr.2021.12059] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 03/04/2021] [Indexed: 12/17/2022] Open
Abstract
Deafness is one of the most common sensory disorders found in humans; notably, >60% of all cases of deafness have been attributed to genetic factors. Variants in potassium voltage-gated channel subfamily Q member 4 (KCNQ4) are etiologically linked to a type of progressive hearing loss, deafness non-syndromic autosomal dominant 2A (DFNA2A). In the present study, whole-exome sequencing (WES) was performed on three members of a five-generation Chinese family with 46 members with hearing loss. Pure tone audiometry and Sanger sequencing were performed for 11 family members to determine whether the novel variant in the KCNQ4 gene was segregated with the affected family members. In addition, evolutionary conservation analysis and computational tertiary structure protein prediction of the wild-type KCNQ4 protein and its variant were performed. The family exhibited autosomal dominant, progressive, post-lingual, non-syndromic sensorineural hearing loss. A novel co-segregating heterozygous missense variant (c.857A>G; p.Tyr286Cys) in the glycine-tyrosine-glycine signature sequence in the pore region of the KCNQ4 channel was identified. This variant was predicted to result in a tyrosine-to-cysteine substitution at position 286 in the KCNQ4 protein. The tyrosine at position 286 is well conserved across different species. The substitution of tyrosine with cysteine would affect the structure of the pore region, resulting in the loss of channel function. The KCNQ4 gene is one of the most common mutated genes observed in patients with autosomal dominant, non-syndromic hearing loss. Taken together, for the family analyzed in the present study, performing WES in conjunction with Sanger sequencing has led to the detection of a novel, potentially causative variant (c.857 A>G; p.Tyr286Cys) in exon 6 of the KCNQ4 gene. The present study has added to the number of pathogenic variants observed in the KCNQ4 gene, and the findings may prove to be useful for both the diagnosis of DFNA2A and in the design of early interventional therapies.
Collapse
Affiliation(s)
- Qiong Li
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Pengfei Liang
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Shujuan Wang
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Wei Li
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Jian Wang
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Yang Yang
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Xiaogang An
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Jun Chen
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Dingjun Zha
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi 710032, P.R. China
| |
Collapse
|
50
|
Amanat S, Gallego-Martinez A, Sollini J, Perez-Carpena P, Espinosa-Sanchez JM, Aran I, Soto-Varela A, Batuecas-Caletrio A, Canlon B, May P, Cederroth CR, Lopez-Escamez JA. Burden of rare variants in synaptic genes in patients with severe tinnitus: An exome based extreme phenotype study. EBioMedicine 2021; 66:103309. [PMID: 33813136 PMCID: PMC8047463 DOI: 10.1016/j.ebiom.2021.103309] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 02/22/2021] [Accepted: 03/12/2021] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND tinnitus is a heterogeneous condition associated with audiological and/or mental disorders. Chronic, severe tinnitus is reported in 1% of the population and it shows a relevant heritability, according to twins, adoptees and familial aggregation studies. The genetic contribution to severe tinnitus is unknown since large genomic studies include individuals with self-reported tinnitus and large heterogeneity in the phenotype. The aim of this study was to identify genes for severe tinnitus in patients with extreme phenotype. METHODS for this extreme phenotype study, we used three different cohorts with European ancestry (Spanish with Meniere disease (MD), Swedes tinnitus and European generalized epilepsy). In addition, four independent control datasets were also used for comparisons. Whole-exome sequencing was performed for the MD and epilepsy cohorts and whole-genome sequencing was carried out in Swedes with tinnitus. FINDINGS we found an enrichment of rare missense variants in 24 synaptic genes in a Spanish cohort, the most significant being PRUNE2, AKAP9, SORBS1, ITGAX, ANK2, KIF20B and TSC2 (p < 2E-04), when they were compared with reference datasets. This burden was replicated for ANK2 gene in a Swedish cohort with 97 tinnitus individuals, and in a subset of 34 Swedish patients with severe tinnitus for ANK2, AKAP9 and TSC2 genes (p < 2E-02). However, these associations were not significant in a third cohort of 701 generalized epilepsy individuals without tinnitus. Gene ontology (GO) and gene-set enrichment analyses revealed several pathways and biological processes involved in severe tinnitus, including membrane trafficking and cytoskeletal protein binding in neurons. INTERPRETATION a burden of rare variants in ANK2, AKAP9 and TSC2 is associated with severe tinnitus. ANK2, encodes a cytoskeleton scaffolding protein that coordinates the assembly of several proteins, drives axonal branching and influences connectivity in neurons.
Collapse
Affiliation(s)
- Sana Amanat
- Otology & Neurotology Group CTS495, Department of Genomic Medicine, GENYO-Centre for Genomics and Oncological Research-Pfizer/University of Granada/ Junta de Andalucía, PTS, Granada, Spain
| | - Alvaro Gallego-Martinez
- Otology & Neurotology Group CTS495, Department of Genomic Medicine, GENYO-Centre for Genomics and Oncological Research-Pfizer/University of Granada/ Junta de Andalucía, PTS, Granada, Spain
| | - Joseph Sollini
- Hearing Sciences, Division of Clinical Neuroscience, School of Medicine, University of Nottingham, Nottingham, UK
| | - Patricia Perez-Carpena
- Otology & Neurotology Group CTS495, Department of Genomic Medicine, GENYO-Centre for Genomics and Oncological Research-Pfizer/University of Granada/ Junta de Andalucía, PTS, Granada, Spain; Department of Otolaryngology, Instituto de Investigación Biosanitaria, ibs.Granada, Hospital Universitario Virgen de las Nieves, Granada, Spain
| | - Juan M Espinosa-Sanchez
- Otology & Neurotology Group CTS495, Department of Genomic Medicine, GENYO-Centre for Genomics and Oncological Research-Pfizer/University of Granada/ Junta de Andalucía, PTS, Granada, Spain; Department of Otolaryngology, Instituto de Investigación Biosanitaria, ibs.Granada, Hospital Universitario Virgen de las Nieves, Granada, Spain
| | - Ismael Aran
- Department of Otolaryngology, Complexo Hospitalario de Pontevedra, Pontevedra, Spain
| | - Andres Soto-Varela
- Division of Otoneurology, Department of Otorhinolaryngology, Complexo Hospitalario Universitario, Santiago de Compostela, Spain
| | | | - Barbara Canlon
- Laboratory of Experimental Audiology, Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - Patrick May
- Bioinformatics Core, Luxembourg Centre for System Biomedicine, University of Luxemburg, Esch-sur-Alzette, Luxembourg
| | - Christopher R Cederroth
- Hearing Sciences, Division of Clinical Neuroscience, School of Medicine, University of Nottingham, Nottingham, UK; Laboratory of Experimental Audiology, Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden; National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust, Ropewalk House, Nottingham, UK
| | - Jose A Lopez-Escamez
- Otology & Neurotology Group CTS495, Department of Genomic Medicine, GENYO-Centre for Genomics and Oncological Research-Pfizer/University of Granada/ Junta de Andalucía, PTS, Granada, Spain; Department of Otolaryngology, Instituto de Investigación Biosanitaria, ibs.Granada, Hospital Universitario Virgen de las Nieves, Granada, Spain; Department of Surgery, Division of Otolaryngology, University of Granada, Granada, Spain.
| |
Collapse
|