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Linhuan H, Liangying Z, Shaobin L, Caixia Z, Danlei C, Siqi H, Peiming H, Shu K, Yingjun X, Yanmin L. Effect of MSX1 on the cellular function of cardiomyocytes. Gene 2024; 916:148419. [PMID: 38556116 DOI: 10.1016/j.gene.2024.148419] [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: 01/07/2024] [Revised: 03/14/2024] [Accepted: 03/26/2024] [Indexed: 04/02/2024]
Abstract
MSX1 (Muscle Segment Homeobox 1) has pleiotropic effects in various tissues, including cardiomyocytes, while the effect of MSX1 on cardiomyocyte cellular function was not well known. In this study, we used AC16 cell culture, real-time fluorescence quantitative PCR (qPCR), protein blotting (Western blot), flow cytometry apoptosis assay and lactate dehydrogenase (LDH) ELISA (Enzyme-Linked Immunosorbnent Assay) to investigate the effect of the MSX1 gene on cardiomyocyte function. The results showed that MSX1 plays a protective role against hypoxia of cardiomyocytes. However, further studies are required to fully understand the role of MSX1 in the regulation of LDH expression in different cell types and under different conditions.
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Affiliation(s)
- Huang Linhuan
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510100, Guangdong Province, PR China.
| | - Zhong Liangying
- Department of Clinical Laboratory, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510100, Guangdong Province, PR China.
| | - Lin Shaobin
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510100, Guangdong Province, PR China.
| | - Zhu Caixia
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510100, Guangdong Province, PR China.
| | - Cai Danlei
- Department of Ultrasound, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510100, Guangdong Province, PR China.
| | - Huang Siqi
- Department of Obstetrics and Gynecology, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, Guangdong Provincial Clinical Research Center for Obstetrics and Gynecology, Guangdong-Hong Kong-Macao Greater Bay Area Higher Education Joint Laboratory of Maternal-Fetal Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou 510150, Guangdong Province, PR China.
| | - Hong Peiming
- Department of Obstetrics and Gynecology, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, Guangdong Provincial Clinical Research Center for Obstetrics and Gynecology, Guangdong-Hong Kong-Macao Greater Bay Area Higher Education Joint Laboratory of Maternal-Fetal Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou 510150, Guangdong Province, PR China.
| | - Kong Shu
- Department of Obstetrics and Gynecology, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, Guangdong Provincial Clinical Research Center for Obstetrics and Gynecology, Guangdong-Hong Kong-Macao Greater Bay Area Higher Education Joint Laboratory of Maternal-Fetal Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou 510150, Guangdong Province, PR China.
| | - Xie Yingjun
- Department of Obstetrics and Gynecology, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, Guangdong Provincial Clinical Research Center for Obstetrics and Gynecology, Guangdong-Hong Kong-Macao Greater Bay Area Higher Education Joint Laboratory of Maternal-Fetal Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou 510150, Guangdong Province, PR China.
| | - Luo Yanmin
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510100, Guangdong Province, PR China.
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Younis A, Santangeli P, Garrott K, Buck E, Tabaja C, Wass SY, Lehn L, Kleve R, Hussein AA, Nakhla S, Nakagawa H, Taigen T, Kanj M, Sroubek J, Saliba WI, Wazni OM. Impact of Contact Force on Pulsed Field Ablation Outcomes Using Focal Point Catheter. Circ Arrhythm Electrophysiol 2024; 17:e012723. [PMID: 38690671 DOI: 10.1161/circep.123.012723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Accepted: 03/26/2024] [Indexed: 05/02/2024]
Abstract
BACKGROUND Conventional focal radiofrequency catheters may be modified to enable multiple energy modalities (radiofrequency or pulsed field [PF]) with the benefit of contact force (CF) feedback, providing greater flexibility in the treatment of arrhythmias. Information on the impact of CF on lesion formation in PF ablations remains limited. METHODS An in vivo study was performed with 8 swine using an investigational dual-energy CF focal catheter with local impedance. Experiment I: To evaluate atrial lesion formation, contiguity, and width, a point-by-point approach was used to create an intercaval line. The distance between the points was prespecified at 4±1 mm. Half of the line was created with radiofrequency energy, whereas the other half utilized PF (single 2.0 kV application with a proprietary waveform). Experiment II: To evaluate single application lesion dimensions with a proprietary waveform, discrete ventricular lesions were performed with PFA (single 2.0 kV application) with targeted levels of CF: low, 5 to 15 g; medium, 20 to 30 g; and high, 35 to 45 g. Following 1 week of survival, animals underwent endocardial/epicardial remapping, and euthanasia to enable histopathologic examination. RESULTS Experiment I: Both energy modalities resulted in a complete intercaval line of transmural ablation. PF resulted in significantly wider lines than radiofrequency: minimum width, 14.9±2.3 versus 5.0±1.6 mm; maximum width, 21.8±3.4 versus 7.3±2.1 mm, respectively; P<0.01 for each. Histology confirmed transmural lesions with both modalities. Experiment II: With PF, lesion depth, width, and volume were larger with higher degrees of CF (depth: r=0.82, P<0.001; width: r=0.26, P=0.052; and volume: r=0.55, P<0.001), with depth increasing at a faster rate than width. The mean depths were as follows: low (n=17), 4.3±1.0 mm; medium (n=26), 6.4±1.2 mm; and high (n=14), 9.1±1.4 mm. CONCLUSIONS Using the same focal point CF-sensing catheter, a novel PF ablation waveform with a single application resulted in transmural atrial lesions that were significantly wider than radiofrequency. Lesion depth showed a significant positive correlation with CF with depths of 6.4 mm at moderate CF.
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Affiliation(s)
- Arwa Younis
- Cardiac Electrophysiology Section, Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, OH (A.Y., P.S., C.T., S.Y.W., A.A.H., S.N., H.N., T.T., M.K., J.S., W.I.S., O.M.W.)
| | - Pasquale Santangeli
- Cardiac Electrophysiology Section, Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, OH (A.Y., P.S., C.T., S.Y.W., A.A.H., S.N., H.N., T.T., M.K., J.S., W.I.S., O.M.W.)
| | - Kara Garrott
- Boston Scientific Corporation, St. Paul, MN (K.G., E.B., L.L., R.K.)
| | - Eric Buck
- Boston Scientific Corporation, St. Paul, MN (K.G., E.B., L.L., R.K.)
| | - Chadi Tabaja
- Cardiac Electrophysiology Section, Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, OH (A.Y., P.S., C.T., S.Y.W., A.A.H., S.N., H.N., T.T., M.K., J.S., W.I.S., O.M.W.)
| | - Sojin Y Wass
- Cardiac Electrophysiology Section, Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, OH (A.Y., P.S., C.T., S.Y.W., A.A.H., S.N., H.N., T.T., M.K., J.S., W.I.S., O.M.W.)
| | - Lauren Lehn
- Boston Scientific Corporation, St. Paul, MN (K.G., E.B., L.L., R.K.)
| | - Ryan Kleve
- Boston Scientific Corporation, St. Paul, MN (K.G., E.B., L.L., R.K.)
| | - Ayman A Hussein
- Cardiac Electrophysiology Section, Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, OH (A.Y., P.S., C.T., S.Y.W., A.A.H., S.N., H.N., T.T., M.K., J.S., W.I.S., O.M.W.)
| | - Shady Nakhla
- Cardiac Electrophysiology Section, Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, OH (A.Y., P.S., C.T., S.Y.W., A.A.H., S.N., H.N., T.T., M.K., J.S., W.I.S., O.M.W.)
| | - Hiroshi Nakagawa
- Cardiac Electrophysiology Section, Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, OH (A.Y., P.S., C.T., S.Y.W., A.A.H., S.N., H.N., T.T., M.K., J.S., W.I.S., O.M.W.)
| | - Tyler Taigen
- Cardiac Electrophysiology Section, Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, OH (A.Y., P.S., C.T., S.Y.W., A.A.H., S.N., H.N., T.T., M.K., J.S., W.I.S., O.M.W.)
| | - Mohamed Kanj
- Cardiac Electrophysiology Section, Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, OH (A.Y., P.S., C.T., S.Y.W., A.A.H., S.N., H.N., T.T., M.K., J.S., W.I.S., O.M.W.)
| | - Jakub Sroubek
- Cardiac Electrophysiology Section, Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, OH (A.Y., P.S., C.T., S.Y.W., A.A.H., S.N., H.N., T.T., M.K., J.S., W.I.S., O.M.W.)
| | - Walid I Saliba
- Cardiac Electrophysiology Section, Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, OH (A.Y., P.S., C.T., S.Y.W., A.A.H., S.N., H.N., T.T., M.K., J.S., W.I.S., O.M.W.)
| | - Oussama M Wazni
- Cardiac Electrophysiology Section, Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, OH (A.Y., P.S., C.T., S.Y.W., A.A.H., S.N., H.N., T.T., M.K., J.S., W.I.S., O.M.W.)
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Chen B, Lv C, Cui Y, Lu C, Cai H, Xue Z, Xu X, Su S. A pilot clinical assessment of biphasic asymmetric pulsed field ablation catheter for pulmonary vein isolation. Front Cardiovasc Med 2024; 11:1266195. [PMID: 38385135 PMCID: PMC10879394 DOI: 10.3389/fcvm.2024.1266195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 01/24/2024] [Indexed: 02/23/2024] Open
Abstract
Pulsed field ablation (PFA) is a new treatment for atrial fibrillation (AF), and its selective ablation characteristics give it a significant advantage in treatment. In previous cellular and animal experiments, we have demonstrated that biphasic asymmetric pulses can be used to ablate myocardial tissue. However, small-scale clinical trials are needed to test whether this approach is safe and feasible before extensive clinical trials can be performed. Therefore, the purpose of this experiment is to determine the safety and feasibility of biphasic asymmetric pulses in patients with AF and is to lay the foundation for a larger clinical trial. Ablation was performed in 10 patients with AF using biphasic asymmetric pulses. Voltage mapping was performed before and after PFA operation to help us detect the change in the electrical voltage of the pulmonary veins (PV). 3-Dimensional mapping system showed continuous low potential in the ablation site, and pulmonary vein isolation (PVI) was achieved in all four PV of the patients. There were no recurrences, PV stenosis, or other serious adverse events during the 12 months follow-up. The results suggest that PFA using biphasic asymmetric waveforms for patients with AF is safe, durable, and effective and that a larger clinical trial could begin. Clinical Trial Registration https://www.chictr.org.cn/, identifier, ChiCTR2100051894.
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Affiliation(s)
- Bingwei Chen
- School of Biomedical Engineering and Technology, Tianjin Medical University, Tianjin, China
- Department of Cardiology, Tianjin First Central Hospital, Tianjin, China
| | - Chang Lv
- School of Biomedical Engineering and Technology, Tianjin Medical University, Tianjin, China
| | - Yingjian Cui
- School of Biomedical Engineering and Technology, Tianjin Medical University, Tianjin, China
| | - Chengzhi Lu
- Department of Cardiology, Tianjin First Central Hospital, Tianjin, China
| | - Heng Cai
- Department of Cardiology, Tianjin Medical University General Hospital, Tianjin, China
| | - Zhixiao Xue
- School of Biomedical Engineering and Technology, Tianjin Medical University, Tianjin, China
| | - Xinyu Xu
- School of Biomedical Engineering and Technology, Tianjin Medical University, Tianjin, China
| | - Siying Su
- Department of Research and Development, Tianjin Intelligent Health Medical Co., Ltd., Tianjin, China
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