{"title":"Transcriptome analysis of the aortic coarctation area","authors":"","doi":"10.1016/j.jmccpl.2024.100094","DOIUrl":"10.1016/j.jmccpl.2024.100094","url":null,"abstract":"<div><h3>Background</h3><div>Coarctation of the aorta (CoA) is a relatively common congenital heart defect. The underlying causes are not known, but a combination of genetic factors and abnormalities linked to embryonic development is suspected. There are only a few studies of the underlying molecular mechanisms in CoA. The aim of the current study was to expand our understanding of the pathogenesis of CoA by characterizing the transcriptome of the coarctation area.</div></div><div><h3>Methods</h3><div>Tissue samples from 21 pediatric patients operated for CoA were dissected into separate biopsies consisting of the localized coarctation itself, proximal/distal tissue and ductus. RNA was sequenced to evaluate gene expression in the different biopsies.</div></div><div><h3>Results</h3><div>We observed an activation of acute phase response in samples from the localized coarctation compared to samples from distal or proximal tissue. However, we observed even bigger differences for patient age and sex than compared to biopsy location. A cluster of genes located at 1q21, including the S100 gene family, displayed contrasting expression depending on patient sex, and appeared to affect the balance between inflammatory and interferon pathways. Biopsies from patients <3 months old were characterized by a significantly higher fibrotic activity compared to samples from older patients. The ductus tissue was characterized by an upregulation of factors associated with proliferation.</div></div><div><h3>Conclusions</h3><div>The ongoing processes in the coarctation area are influenced by the age and sex of the patient, and possibly by differences in etiology between different patients. The impact of patient attributes must be taken into consideration when performing future studies.</div></div>","PeriodicalId":73835,"journal":{"name":"Journal of molecular and cellular cardiology plus","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772976124000345/pdfft?md5=c075465d71ff736e6bcc8d95cc7ac49d&pid=1-s2.0-S2772976124000345-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142315871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Conditional ablation of MCU exacerbated cardiac pathology in a genetic arrhythmic model of CPVT","authors":"","doi":"10.1016/j.jmccpl.2024.100093","DOIUrl":"10.1016/j.jmccpl.2024.100093","url":null,"abstract":"<div><h3>Background</h3><p>Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a genetic arrhythmic syndrome caused by mutations in the calcium (Ca<sup>2+</sup>) release channel ryanodine receptor (RyR2) and its accessory proteins. These mutations make the channel leaky, resulting in Ca<sup>2+</sup>-dependent arrhythmias. Besides arrhythmias, CPVT hearts typically lack structural cardiac remodeling, a characteristic often observed in other cardiac conditions (heart failure, prediabetes) also marked by RyR2 leak. Recent studies suggest that mitochondria are able to accommodate more Ca<sup>2+</sup> influx to inhibit arrhythmias in CPVT. Thus, we hypothesize that CPVT mitochondria can absorb diastolic Ca<sup>2+</sup> to protect the heart from cardiac remodeling.</p></div><div><h3>Methods and results</h3><p>The Mitochondrial Ca<sup>2+</sup> uniporter (MCU), the main mitochondrial Ca<sup>2+</sup> uptake protein, was conditionally knocked out in a CPVT model of calsequestrin 2 (CASQ2) KO. In vivo cardiac function was impaired in the CASQ2<sup>−/−</sup>-MCU<sup>CKO</sup> model as assessed by echocardiography. Cardiac dilation and cellular hypertrophy were also observed in the CASQ2<sup>−/−</sup>-MCU<sup>CKO</sup> hearts. Live-cell imaging identified altered Ca<sup>2+</sup> handling and increased oxidative stress in CASQ2<sup>−/−</sup>-MCU<sup>CKO</sup> myocytes. The activation status of Ca<sup>2+</sup>-dependent remodeling pathways (CaMKII, Calcineurin) was not altered in the CASQ2<sup>−/−</sup>-MCU<sup>CKO</sup> model. RNAseq identified changes in the transcriptome of the CASQ2<sup>−/−</sup>-MCU<sup>CKO</sup> hearts, distinct from the classic cardiac remodeling program of fetal gene re-expression.</p></div><div><h3>Conclusions</h3><p>We present genetic evidence that mitochondria play a protective role in CPVT. MCU-dependent Ca<sup>2+</sup> uptake is crucial for preventing pathological cardiac remodeling in CPVT.</p></div>","PeriodicalId":73835,"journal":{"name":"Journal of molecular and cellular cardiology plus","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772976124000333/pdfft?md5=8ef6c8a61076f2dcb4155d45ed6349eb&pid=1-s2.0-S2772976124000333-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142233710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"P-, E-, and H-cadherins differ in their relationships with coronary stenosis, cardiovascular outcomes, and unplanned recurrent revascularization","authors":"","doi":"10.1016/j.jmccpl.2024.100091","DOIUrl":"10.1016/j.jmccpl.2024.100091","url":null,"abstract":"<div><h3>Background and aims</h3><p>Cadherins are adhesion proteins, and their dysregulation may result in the development of atherosclerosis, plaque rupture, or lesions of the vascular wall. The aim of the present study was to detect the associations of cadherins-P, −E, and <img>H, with atherosclerosis and pathological cardiovascular conditions.</p></div><div><h3>Methods and results</h3><p>The present study with 3-year follow up evaluated atherosclerosis and fasting levels of P-, E-, and H-cadherins in the serum samples of 214 patients in a hospital setting. Coronary lesions were assessed by coronary angiography as Gensini score. Serum proteomic profiling was performed using antibody microarrays. The contents of P-, E-, and H-cadherins in the serum were measured using indirect ELISA. High levels of P- and E-cadherins and low levels of H-cadherin were associated with severity of atherosclerosis. High levels of P- and E-cadherins were associated with higher incidence of nonfatal cardiovascular outcomes. E-cadherin was associated with higher incidence of recurrent revascularization during 3 year follow-up. The results of Spearman rank correlation analysis revealed various associations of the three cadherins with lipid, endothelial, and metabolic biomarkers.</p></div><div><h3>Conclusions</h3><p>The data indicated that classical and atypical cadherins were associated with atherosclerosis progression. Elevated levels of P-cadherin were associated with coronary atherosclerosis. The data indicated that various lipid, endothelial, and metabolic biomarkers may influence the levels of cadherins. Thus, P-, E-, and H-cadherins may be promising markers for the assessment of cardiovascular risk.</p></div>","PeriodicalId":73835,"journal":{"name":"Journal of molecular and cellular cardiology plus","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S277297612400031X/pdfft?md5=c09976a177a807ea7c2d8cb942485491&pid=1-s2.0-S277297612400031X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142149210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Sex differences in cardiac mitochondrial respiration and reactive oxygen species production may predispose Scn1a−/+ mice to cardiac arrhythmias and Sudden Unexpected Death in Epilepsy","authors":"","doi":"10.1016/j.jmccpl.2024.100090","DOIUrl":"10.1016/j.jmccpl.2024.100090","url":null,"abstract":"<div><p>Dravet Syndrome (DS) is a pediatric-onset epilepsy with an elevated risk of Sudden Unexpected Death in Epilepsy (SUDEP). Most individuals with DS possess mutations in the voltage-gated sodium channel gene <em>Scn1a</em>, expressed in both the brain and heart. Previously, mutations in <em>Scn1a</em> have been linked to arrhythmia. We used a <em>Scn1a</em><sup><em>−/+</em></sup> DS mouse model to investigate changes to cardiac mitochondrial function that may underlie arrhythmias and SUDEP. We detected significant alterations in mitochondrial bioenergetics that were sex-specific. Mitochondria from male <em>Scn1a</em><sup>−/+</sup> hearts had deficits in maximal (<em>p</em> = 0.02) and Complex II-linked respiration (<em>p</em> = 0.03). Male <em>Scn1a</em><sup><em>−/+</em></sup> mice were also more susceptible to cardiac arrhythmias under increased workload. When isolated cardiomyocytes were subjected to diamide, cardiomyocytes from male <em>Scn1a</em><sup><em>−/+</em></sup> hearts were less resistant to thiol oxidation. They had decreased survivability compared to <em>Scn1a</em><sup><em>+/+</em></sup> (<em>p</em> = 0.02) despite no whole-heart differences. Lastly, there were no changes in mitochondrial ROS production between DS and wild-type mitochondria at basal conditions, but <em>Scn1a</em><sup><em>−/+</em></sup> mitochondria accumulated more ROS during hypoxia/reperfusion. This study determines novel sex-linked differences in mitochondrial and antioxidant function in <em>Scn1a</em>-linked DS. Importantly, we found that male <em>Scn1a</em><sup><em>−/+</em></sup> mice are more susceptible to cardiac arrhythmias than female <em>Scn1a</em><sup><em>−/+</em></sup> mice. When developing new therapeutics to address SUDEP risk in DS, sex should be considered.</p></div>","PeriodicalId":73835,"journal":{"name":"Journal of molecular and cellular cardiology plus","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772976124000308/pdfft?md5=2da615d16145cdfd13dc6d32f23a5506&pid=1-s2.0-S2772976124000308-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142041131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Cardiac overexpression of a mitochondrial SUR2A splice variant impairs cardiac function and worsens myocardial ischemia reperfusion injury in female mice","authors":"","doi":"10.1016/j.jmccpl.2024.100088","DOIUrl":"10.1016/j.jmccpl.2024.100088","url":null,"abstract":"<div><p>The small splice variant of the sulfonylurea receptor protein isoform 2 A (SUR2A-55) targets mitochondria and enhances mitoK<sub>ATP</sub> activity. In male mice the overexpression of this protein promotes cardioprotection, reducing myocardial injury after an ischemic insult. However, it is unclear what impact SUR2A-55 overexpression has on the female myocardium. To investigate the impact of SU2R2A-55 on the female heart, mice with cardiac specific transgenic overexpression of SUR2A-55 (TG<sup>SUR2A-55</sup>) were examined by resting echocardiography and histopathology. In addition, hearts were subjected to ischemia reperfusion (IR) injury. Female TG<sup>SUR2A-55</sup> mice had resting LV dysfunction and worse hemodynamic recovery with increased infarct size after IR injury. RNA-seq analysis found 227 differential expressed genes between WT and TG<sup>SUR2A-55</sup> female mouse hearts that were enriched in pathways of cellular metabolism. This was in direct contrast to male mice that had only four differentially expressed genes. Female TG<sup>SUR2A-55</sup> mice compared to female WT mice had reduced cardiomyocyte mitochondrial membrane potential without a change in electron transport chain protein expression. In addition, isolated mitochondria from female TG<sup>SUR2A-55</sup> hearts displayed reduced sensitivity to ATP and diazoxide suggestive of increased mitoK<sub>ATP</sub> activity. In conclusion, our data suggests that female TG<sup>SUR2A-55</sup> mice are unable to tolerate a more active mitoK<sub>ATP</sub> channel leading to LV dysfunction and worse response to IR injury. This is in direct contrast to our prior report showing cardioprotection in male mice overexpressing SUR2A-55 in heart. Future research directed at examining the expression and activity of mitoK<sub>ATP</sub> subunits according to sex may elucidate different treatments for male and female patients.</p></div>","PeriodicalId":73835,"journal":{"name":"Journal of molecular and cellular cardiology plus","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S277297612400028X/pdfft?md5=c267e0fb6c4d3b479f2f56a6cc684dd8&pid=1-s2.0-S277297612400028X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141997550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Cardiac growth patterns and metabolism before and after birth in swine: Role of miR in proliferation, hypertrophy and metabolism","authors":"","doi":"10.1016/j.jmccpl.2024.100084","DOIUrl":"10.1016/j.jmccpl.2024.100084","url":null,"abstract":"<div><p>The adult mammalian heart is unable to undergo cardiac repair, limiting potential treatment options after cardiac damage. However, the fetal heart is capable of cardiac repair. In preparation for birth, cardiomyocytes (CMs) undergo major maturational changes that include exit from the cell cycle, hypertrophic growth, and mitochondrial maturation. The timing and regulation of such events in large mammals is not fully understood. In the present study, we aimed to assess this critical CM transition period using pigs as a preclinically relevant model. Left ventricular myocardium from Large White cross Landrace gilts was collected at 91, 98, 106 and 111–113 days gestation (d GA; term = 115d GA) and in piglets at 0–1, 4–5, 14–18, 19–20 days after birth. We found that miR-133a, which has known roles in CM proliferation, was significantly downregulated before birth, before rising postnatally. Likewise, gene expression of <em>PCNA</em> and <em>CDK1</em> was repressed until birth with a rise postnatally, suggesting a decline in proliferation during late gestation followed by the onset of multinucleation in postnatal life. The timing of the switch in myocardial metabolism was unclear; however, complexes within the electron transport chain and mitochondrial biogenesis followed a similar pattern of decreasing abundance during late gestation and then a rise postnatally. These data suggest that CM maturation events such as cell cycle arrest and mitochondrial maturation occur around birth. These results may prove important to consider for preclinical applications such as the development of new therapeutics for cardiac repair.</p></div>","PeriodicalId":73835,"journal":{"name":"Journal of molecular and cellular cardiology plus","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772976124000242/pdfft?md5=1d3f138a7c39b0609b145895db910f42&pid=1-s2.0-S2772976124000242-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141959724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Cardiac-targeted delivery of a novel Drp1 inhibitor for acute cardioprotection","authors":"","doi":"10.1016/j.jmccpl.2024.100085","DOIUrl":"10.1016/j.jmccpl.2024.100085","url":null,"abstract":"<div><p>Dynamin-related protein 1 (Drp1) is a mitochondrial fission protein and a viable target for cardioprotection against myocardial ischaemia-reperfusion injury. Here, we reported a novel Drp1 inhibitor (DRP1i1), delivered using a cardiac-targeted nanoparticle drug delivery system, as a more effective approach for achieving acute cardioprotection. DRP1i1 was encapsulated in cubosome nanoparticles with conjugated cardiac-homing peptides (NanoDRP1i1) and the encapsulation efficiency was 99.3 ± 0.1 %. In vivo, following acute myocardial ischaemia-reperfusion injury in mice, NanoDRP1i1 significantly reduced infarct size and serine-616 phosphorylation of Drp1, and restored cardiomyocyte mitochondrial size to that of sham group. Imaging by mass spectrometry revealed higher accumulation of DRP1i1 in the heart tissue when delivered as NanoDRP1i1. In human cardiac organoids subjected to simulated ischaemia-reperfusion injury, treatment with NanoDRP1i1 at reperfusion significantly reduced cardiac cell death, contractile dysfunction, and mitochondrial superoxide levels. Following NanoDRP1i1 treatment, cardiac organoid proteomics further confirmed reprogramming of contractile dysfunction markers and enrichment of the mitochondrial protein network, cytoskeletal and metabolic regulation networks when compared to the simulated injury group. These proteins included known cardioprotective regulators identified in human organoids and in vivo murine studies following ischaemia-reperfusion injury. DRP1i1 is a promising tool compound to study Drp1-mediated mitochondrial fission and exhibits promising therapeutic potential for acute cardioprotection, especially when delivered using the cardiac-targeted cubosome nanoparticles.</p></div>","PeriodicalId":73835,"journal":{"name":"Journal of molecular and cellular cardiology plus","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772976124000254/pdfft?md5=3feae23576da412a84dd6d99efeb08af&pid=1-s2.0-S2772976124000254-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141636811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Amber Korn , Suat Simsek , Mitchell D. Fiet , Ingeborg S.E. Waas , Hans W.M. Niessen , Paul A.J. Krijnen
{"title":"Application of adipose tissue-derived stem cell therapy with a clinically relevant dose does not significantly affect atherosclerotic plaque characteristics in a streptozotocin-induced hyperglycaemia mouse model","authors":"Amber Korn , Suat Simsek , Mitchell D. Fiet , Ingeborg S.E. Waas , Hans W.M. Niessen , Paul A.J. Krijnen","doi":"10.1016/j.jmccpl.2024.100083","DOIUrl":"https://doi.org/10.1016/j.jmccpl.2024.100083","url":null,"abstract":"<div><h3>Aims</h3><p>Diabetes mellitus (DM) induces increased inflammation of atherosclerotic plaques, resulting in elevated plaque instability. Mesenchymal stem cell (MSC) therapy was shown to decrease plaque size and increase stability in non-DM animal models. We now studied the effect of MSC therapy in a streptozotocin-induced hyperglycaemia mouse model using a clinically relevant dose of adipose tissue-derived MSCs (ASCs).</p></div><div><h3>Methods</h3><p>Hyperglycaemia was induced in male C57BL/6 ApoE<sup>−/−</sup> mice (<em>n</em>=24) via intraperitoneal streptozotocin (STZ) injection (0.05 mg/g bodyweight) for 5 consecutive days. 16 weeks after the first STZ injection, the mice received either 100,000 ASCs (<em>n</em>=9) or vehicle (<em>n</em>=14) intravenously. The effects of ASC treatment on the size and stability of aortic root atherosclerotic plaques were determined 4 weeks post-treatment via (immuno)histochemical analyses. Furthermore, plasma monocyte subsets within 3 days pre- and 3 days post-treatment, and 4 weeks post-treatment, were studied.</p></div><div><h3>Results</h3><p>ASC treatment did not significantly affect atherosclerotic plaque size or intra-plaque inflammation. Although ASC-treated mice had a higher percentage of intra-plaque fibrosis (42.5±3.3%) compared to vehicle-treated mice (37.6±6.8%, <em>p</em>=0.07), this did not reach significance. Additionally, although differences in the percentages of circulating pro- and anti-inflammatory monocytes were observed after ASC treatment compared to pre-treatment (<em>p</em>=0.005), their levels did not differ significantly at any time point compared to vehicle-treated mice.</p></div><div><h3>Conclusions</h3><p>ASC treatment with a clinically relevant dose did not significantly affect atherosclerotic plaque size or intra-plaque inflammation in a hyperglycaemia mouse model. Despite a borderline significant improvement in intraplaque fibrotic content, the potential of ASC treatment on atherosclerotic plaque stability in a diabetic environment remains to be determined.</p></div>","PeriodicalId":73835,"journal":{"name":"Journal of molecular and cellular cardiology plus","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772976124000230/pdfft?md5=4ff700530e5023562a038de7af88520e&pid=1-s2.0-S2772976124000230-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141607070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Amanda Davenport , Chase W. Kessinger , Ryan D. Pfeiffer , Nikita Shah , Richard Xu , E. Dale Abel , Nathan R. Tucker , Zhiqiang Lin
{"title":"Comparative analysis of two independent Myh6-Cre transgenic mouse lines","authors":"Amanda Davenport , Chase W. Kessinger , Ryan D. Pfeiffer , Nikita Shah , Richard Xu , E. Dale Abel , Nathan R. Tucker , Zhiqiang Lin","doi":"10.1016/j.jmccpl.2024.100081","DOIUrl":"https://doi.org/10.1016/j.jmccpl.2024.100081","url":null,"abstract":"<div><p>We have previously shown that the <em>Myh6</em> promoter drives Cre expression in a subset of male germ line cells in three independent <em>Myh6-Cre</em> mouse lines, including two transgenic lines and one knock-in allele. In this study, we further compared the tissue-specificity of the two <em>Myh6-Cre</em> transgenic mouse lines, <em>MDS Myh6-Cre and AUTR Myh6-Cre,</em> through examining the expression of tdTomato (tdTom) red fluorescence protein in multiple internal organs, including the heart, brain, liver, lung, pancreas and brown adipose tissue. Our results show that <em>MDS Myh6-Cre</em> mainly activates tdTom reporter in the heart, whereas <em>AUTR Myh6-Cre</em> activates tdTom expression significantly in the heart, and in the cells of liver, pancreas and brain. In the heart, similar to <em>MDS Myh6-Cre</em><strong>,</strong> <em>AUTR Myh6-Cre</em> activates tdTom in most cardiomyocytes. In the other organs, <em>AUTR Myh6-Cre</em> not only mosaically activates tdTom in some parenchymal cells, such as hepatocytes in the liver and neurons in the brain, but also turns on tdTom in some interstitial cells of unknown identity.</p></div>","PeriodicalId":73835,"journal":{"name":"Journal of molecular and cellular cardiology plus","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772976124000217/pdfft?md5=dd1462761635d293fc8c059df82c8a5c&pid=1-s2.0-S2772976124000217-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141593568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Specific, or not specific, that is the question: Is Cre recombinase deleting your favorite gene only in cardiomyocytes?","authors":"O. Ronda, H. Roderick","doi":"10.1016/j.jmccpl.2024.100082","DOIUrl":"https://doi.org/10.1016/j.jmccpl.2024.100082","url":null,"abstract":"","PeriodicalId":73835,"journal":{"name":"Journal of molecular and cellular cardiology plus","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141711101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}