JAK2 as a surface marker for enrichment of human pluripotent stem cells-derived ventricular cardiomyocytes
Abstract Background Human pluripotent stem cell (hPSC)-derived cardiomyocytes (CMs) hold great promise for cardiac disease modelling, drug discovery and regenerative medicine. Despite the advancement in various differentiation protocols, the heterogeneity of the generated population composed of dive...
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| Format: | Article |
| Language: | English |
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BMC
2023-12-01
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| Series: | Stem Cell Research & Therapy |
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| Online Access: | https://doi.org/10.1186/s13287-023-03610-2 |
| _version_ | 1797388513146044416 |
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| author | Lee Chuen Liew Boon Min Poh Omer An Beatrice Xuan Ho Christina Ying Yan Lim Jeremy Kah Sheng Pang Leslie Y. Beh Henry He Yang Boon-Seng Soh |
| author_facet | Lee Chuen Liew Boon Min Poh Omer An Beatrice Xuan Ho Christina Ying Yan Lim Jeremy Kah Sheng Pang Leslie Y. Beh Henry He Yang Boon-Seng Soh |
| author_sort | Lee Chuen Liew |
| collection | DOAJ |
| description | Abstract Background Human pluripotent stem cell (hPSC)-derived cardiomyocytes (CMs) hold great promise for cardiac disease modelling, drug discovery and regenerative medicine. Despite the advancement in various differentiation protocols, the heterogeneity of the generated population composed of diverse cardiac subtypes poses a significant challenge to their practical applications. Mixed populations of cardiac subtypes can compromise disease modelling and drug discovery, while transplanting them may lead to undesired arrhythmias as they may not integrate and synchronize with the host tissue's contractility. It is therefore crucial to identify cell surface markers that could enable high purity of ventricular CMs for subsequent applications. Methods By exploiting the fact that immature CMs expressing myosin light chain 2A (MLC2A) will gradually express myosin light chain 2 V (MLC2V) protein as they mature towards ventricular fate, we isolated signal regulatory protein alpha (SIRPA)-positive CMs expressing intracellular MLC2A or MLC2V using MARIS (method for analysing RNA following intracellular sorting). Subsequently, RNA sequencing analysis was performed to examine the gene expression profile of MLC2A + and MLC2V + sorted CMs. We identified genes that were significantly up-regulated in MLC2V + samples to be potential surface marker candidates for ventricular specification. To validate these surface markers, we performed immunostaining and western blot analysis to measure MLC2A and MLC2V protein expressions in SIRPA + CMs that were either positive or negative for the putative surface markers, JAK2 (Janus kinase 2) or CD200. We then characterized the electrophysiological properties of surface marker-sorted CMs, using fluo-4 AM, a green-fluorescent calcium indicator, to measure the cellular calcium transient at the single cell level. For functional validation, we investigated the response of the surface marker-sorted CMs to vernakalant, an atrial-selective anti-arrhythmic agent. Results In this study, while JAK2 and CD200 were identified as potential surface markers for the purification of ventricular-like CMs, the SIRPA+/JAK2+ population showed a higher percentage of MLC2V-expressing cells (~ 90%) compared to SIRPA+/CD200+ population (~ 75%). SIRPA+/JAK2+ sorted CMs exhibited ventricular-like electrophysiological properties, including slower beating rate, slower calcium depolarization and longer calcium repolarization duration. Importantly, vernakalant had limited to no significant effect on the calcium repolarization duration of SIRPA+/JAK2+ population, indicating their enrichment for ventricular-like CMs. Conclusion Our study lays the groundwork for the identification of cardiac subtype surface markers that allow purification of cardiomyocyte sub-populations. Our findings suggest that JAK2 can be employed as a cell surface marker for enrichment of hPSC-derived ventricular-like CMs. |
| first_indexed | 2024-03-08T22:41:54Z |
| format | Article |
| id | doaj.art-f54f98119d2742b692c09b963cbbc537 |
| institution | Directory Open Access Journal |
| issn | 1757-6512 |
| language | English |
| last_indexed | 2024-03-08T22:41:54Z |
| publishDate | 2023-12-01 |
| publisher | BMC |
| record_format | Article |
| series | Stem Cell Research & Therapy |
| spelling | doaj.art-f54f98119d2742b692c09b963cbbc5372023-12-17T12:08:52ZengBMCStem Cell Research & Therapy1757-65122023-12-0114111410.1186/s13287-023-03610-2JAK2 as a surface marker for enrichment of human pluripotent stem cells-derived ventricular cardiomyocytesLee Chuen Liew0Boon Min Poh1Omer An2Beatrice Xuan Ho3Christina Ying Yan Lim4Jeremy Kah Sheng Pang5Leslie Y. Beh6Henry He Yang7Boon-Seng Soh8Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR)Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR)Cancer Science Institute of Singapore, National University of SingaporeInstitute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR)Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR)Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR)Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR)Cancer Science Institute of Singapore, National University of SingaporeInstitute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR)Abstract Background Human pluripotent stem cell (hPSC)-derived cardiomyocytes (CMs) hold great promise for cardiac disease modelling, drug discovery and regenerative medicine. Despite the advancement in various differentiation protocols, the heterogeneity of the generated population composed of diverse cardiac subtypes poses a significant challenge to their practical applications. Mixed populations of cardiac subtypes can compromise disease modelling and drug discovery, while transplanting them may lead to undesired arrhythmias as they may not integrate and synchronize with the host tissue's contractility. It is therefore crucial to identify cell surface markers that could enable high purity of ventricular CMs for subsequent applications. Methods By exploiting the fact that immature CMs expressing myosin light chain 2A (MLC2A) will gradually express myosin light chain 2 V (MLC2V) protein as they mature towards ventricular fate, we isolated signal regulatory protein alpha (SIRPA)-positive CMs expressing intracellular MLC2A or MLC2V using MARIS (method for analysing RNA following intracellular sorting). Subsequently, RNA sequencing analysis was performed to examine the gene expression profile of MLC2A + and MLC2V + sorted CMs. We identified genes that were significantly up-regulated in MLC2V + samples to be potential surface marker candidates for ventricular specification. To validate these surface markers, we performed immunostaining and western blot analysis to measure MLC2A and MLC2V protein expressions in SIRPA + CMs that were either positive or negative for the putative surface markers, JAK2 (Janus kinase 2) or CD200. We then characterized the electrophysiological properties of surface marker-sorted CMs, using fluo-4 AM, a green-fluorescent calcium indicator, to measure the cellular calcium transient at the single cell level. For functional validation, we investigated the response of the surface marker-sorted CMs to vernakalant, an atrial-selective anti-arrhythmic agent. Results In this study, while JAK2 and CD200 were identified as potential surface markers for the purification of ventricular-like CMs, the SIRPA+/JAK2+ population showed a higher percentage of MLC2V-expressing cells (~ 90%) compared to SIRPA+/CD200+ population (~ 75%). SIRPA+/JAK2+ sorted CMs exhibited ventricular-like electrophysiological properties, including slower beating rate, slower calcium depolarization and longer calcium repolarization duration. Importantly, vernakalant had limited to no significant effect on the calcium repolarization duration of SIRPA+/JAK2+ population, indicating their enrichment for ventricular-like CMs. Conclusion Our study lays the groundwork for the identification of cardiac subtype surface markers that allow purification of cardiomyocyte sub-populations. Our findings suggest that JAK2 can be employed as a cell surface marker for enrichment of hPSC-derived ventricular-like CMs.https://doi.org/10.1186/s13287-023-03610-2Cardiac differentiationHuman pluripotent stem cellsVentricular cardiomyocytesCell surface markerCardiac subtypesJAK2 |
| spellingShingle | Lee Chuen Liew Boon Min Poh Omer An Beatrice Xuan Ho Christina Ying Yan Lim Jeremy Kah Sheng Pang Leslie Y. Beh Henry He Yang Boon-Seng Soh JAK2 as a surface marker for enrichment of human pluripotent stem cells-derived ventricular cardiomyocytes Stem Cell Research & Therapy Cardiac differentiation Human pluripotent stem cells Ventricular cardiomyocytes Cell surface marker Cardiac subtypes JAK2 |
| title | JAK2 as a surface marker for enrichment of human pluripotent stem cells-derived ventricular cardiomyocytes |
| title_full | JAK2 as a surface marker for enrichment of human pluripotent stem cells-derived ventricular cardiomyocytes |
| title_fullStr | JAK2 as a surface marker for enrichment of human pluripotent stem cells-derived ventricular cardiomyocytes |
| title_full_unstemmed | JAK2 as a surface marker for enrichment of human pluripotent stem cells-derived ventricular cardiomyocytes |
| title_short | JAK2 as a surface marker for enrichment of human pluripotent stem cells-derived ventricular cardiomyocytes |
| title_sort | jak2 as a surface marker for enrichment of human pluripotent stem cells derived ventricular cardiomyocytes |
| topic | Cardiac differentiation Human pluripotent stem cells Ventricular cardiomyocytes Cell surface marker Cardiac subtypes JAK2 |
| url | https://doi.org/10.1186/s13287-023-03610-2 |
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