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Nguemfo Tchankugni A, Mbida M, Hescheler J, Nguemo F. Effect of Ethanolic Extract of Vernonia amygdalina on the Proliferation, Viability and Function of Mouse Induced Pluripotent Stem Cells and Cardiomyocytes. PLANTS (BASEL, SWITZERLAND) 2023; 12:1108. [PMID: 36903967 PMCID: PMC10005699 DOI: 10.3390/plants12051108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 02/03/2023] [Accepted: 02/15/2023] [Indexed: 06/18/2023]
Abstract
Vernonia amygdalina (V. amygdalina) leaves are commonly used in traditional medicine around the world for the treatment of a plethora disorders, including heart disease. The aim of this study was to examine and evaluate the cardiac effect of V. amygdalina leaf extracts using mouse induced pluripotent stem cells (miPSCs) and their cardiomyocytes' (CMs) derivatives. We used a well-established stem cell culture to assess the effect of V. amygdalina extract on miPSC proliferation, EB formation and the beating activity of miPS cell-derived CMs. To study the cytotoxic effect of our extract, undifferentiating miPSCs were exposed to different concentrations of V. amygdalina. Cell colony formation and EB morphology were assessed using microscopy, whereas the cell viability was accessed with an impedance-based method and immunocytochemistry following treatment with different concentrations of V. amygdalina. Ethanolic extract of V. amygdalina induced toxicity in miPSCs, as revealed by a decrease in cell proliferation and colony formation, and an increase in cell death at a concentration of ≥20 mg/mL. At a concentration of 10 mg/mL, the rate of beating EBs was observed with no significant difference regarding the yield of cardiac cells. In addition, V. amygdalina did not affect the sarcomeric organization, but induced positive or negative effects on miPS cell-derived CMs' differentiation in a concentration-dependent manner. Taken together, our findings demonstrate that the ethanolic extract of V. amygdalina affected cell proliferation, colony forming and cardiac beating capacities in a concentration-dependent manner.
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Affiliation(s)
- Arlette Nguemfo Tchankugni
- Research Unit of Biology and Applied Ecology, Department of Animal Biology, Faculty of Science, University of Dschang, Dschang P.O. Box 067, Cameroon
| | - Mpoame Mbida
- Research Unit of Biology and Applied Ecology, Department of Animal Biology, Faculty of Science, University of Dschang, Dschang P.O. Box 067, Cameroon
| | - Jürgen Hescheler
- Center for Physiology and Pathophysiology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50931 Cologne, Germany
| | - Filomain Nguemo
- Center for Physiology and Pathophysiology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50931 Cologne, Germany
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Li C, Cui Z, Deng S, Chen P, Li X, Yang H. The potential of plant extracts in cell therapy. STEM CELL RESEARCH & THERAPY 2022; 13:472. [PMID: 36104798 PMCID: PMC9476258 DOI: 10.1186/s13287-022-03152-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 05/23/2022] [Indexed: 11/10/2022]
Abstract
Cell therapy is the frontier technology of biotechnology innovation and the most promising method for the treatment of refractory diseases such as tumours. However, cell therapy has disadvantages, such as toxicity and poor therapeutic effects. Plant extracts are natural, widely available, and contain active small molecule ingredients that are widely used in the treatment of various diseases. By studying the effect of plant extracts on cell therapy, active plant extracts that have positive significance in cell therapy can be discovered, and certain contributions to solving the current problems of attenuation and adjuvant therapy in cell therapy can be made. Therefore, this article reviews the currently reported effects of plant extracts in stem cell therapy and immune cell therapy, especially the effects of plant extracts on the proliferation and differentiation of mesenchymal stem cells and nerve stem cells and the potential role of plant extracts in chimeric antigen receptor T-cell immunotherapy (CAR-T) and T-cell receptor modified T-cell immunotherapy (TCR-T), in the hope of encouraging further research and clinical application of plant extracts in cell therapy.
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QuinoMit Q10-Fluid attenuates hydrogen peroxide-induced irregular beating in mouse pluripotent stem cell-derived cardiomyocytes. Biomed Pharmacother 2021; 142:112089. [PMID: 34449318 DOI: 10.1016/j.biopha.2021.112089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Revised: 08/18/2021] [Accepted: 08/19/2021] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Coenzyme Q10 (CoQ10) is a crucial component of the mitochondrial structure which is involved in producing more than 90% of cellular ATP. This study aimed to investigate the protective effects and underlying mechanisms of QuinoMit Q10-Fluid against hydrogen peroxide (H2O2)-induced arrhythmias on cardiomyocytes (CMs). METHODS Undifferentiated stem cell-derived CMs were cultured in the presence of different concentrations of QuinoMit Q10-Fluid. To investigate if CoQ10 has anti-apoptotic activity, CMs were exposed to H2O2 for up to 100 h with or without CoQ10. The expression levels of cardiac reference genes were determined by RT-PCR. The structural and functional properties of CMs were examined by immunofluorescence and the xCELLigence system. Caspase 3/7 assay was also performed for cell apoptosis study. RESULTS The study showed that QuinoMit Q10-Fluid inhibits the proliferation of pluripotent stem cells at high concentrations and had less effect on cardiomyogenesis. However, the beating rate of clusters containing CMs generated under QuinoMit Q10-Fluid (1:100) was significantly increased. This increase was accompanied by the up-regulated expression level of some important cardiac markers during differentiation. Treatment of CMs with H2O2 notably induced irregular beating and decreased the amplitude of the beating signal of CMs, concomitantly with increased caspase-3/7 activity. However, CMs pretreated with QuinoMit exhibited a protective effect against H2O2-induced arrhythmia. CONCLUSION Our results reveal that QuinoMit Q10-Fluid attenuates H2O2-induced irregular beating in mouse pluripotent stem cell-derived CMs, at least partly by reducing the generation of ROS, suggesting a protective effect against CM dysfunctions.
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Nembo EN, Hescheler J, Nguemo F. Stem cells in natural product and medicinal plant drug discovery-An overview of new screening approaches. Biomed Pharmacother 2020; 131:110730. [PMID: 32920519 DOI: 10.1016/j.biopha.2020.110730] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 09/03/2020] [Accepted: 09/04/2020] [Indexed: 01/14/2023] Open
Abstract
Natural products remain a rich source of new drugs, and the search for bioactive molecules from nature continues to play an important role in the development of new medicines. Also, there is increasing use of herbal medicines for the treatment of a plethora of diseases, and demands for more scientific evidence for their efficacy and safety remains a huge challenge. The propensity of stem cells to differentiate into almost every cell type not only holds promise for the delivery of cell-based therapies for currently incurable diseases or a useful tool in studying cell physiology and pathophysiology. Increasingly, stem cells are becoming an important tool in preclinical drug screening and toxicity testing. In this review, we examine the scientific advances made towards the use of pluripotent stem cells as a model for the screening of plant-based medicines. The combination of well-established in vitro electrophysiological and a plethora of toxicogenomic technologies, together with the optimisation of culture methods of herbal plants and pluripotent stem cells can be explored to establish the basis for efficacy, and tissue/organ-based toxicities of many currently used medicinal plants whose efficacies and toxicities remain unknown.
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Affiliation(s)
- Erastus Nembu Nembo
- Institute of Neurophysiology, University of Cologne, 50931, Cologne, Germany
| | - Jürgen Hescheler
- Institute of Neurophysiology, University of Cologne, 50931, Cologne, Germany
| | - Filomain Nguemo
- Institute of Neurophysiology, University of Cologne, 50931, Cologne, Germany.
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Nemade H, Acharya A, Chaudhari U, Nembo E, Nguemo F, Riet N, Abken H, Hescheler J, Papadopoulos S, Sachinidis A. Cyclooxygenases Inhibitors Efficiently Induce Cardiomyogenesis in Human Pluripotent Stem Cells. Cells 2020; 9:cells9030554. [PMID: 32120775 PMCID: PMC7140528 DOI: 10.3390/cells9030554] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 01/28/2020] [Accepted: 02/26/2020] [Indexed: 12/12/2022] Open
Abstract
Application of human pluripotent stem cell-derived cardiomyocytes (hPSC-CMs) is limited by the challenges in their efficient differentiation. Recently, the Wingless (Wnt) signaling pathway has emerged as the key regulator of cardiomyogenesis. In this study, we evaluated the effects of cyclooxygenase inhibitors on cardiac differentiation of hPSCs. Cardiac differentiation was performed by adherent monolayer based method using 4 hPSC lines (HES3, H9, IMR90, and ES4SKIN). The efficiency of cardiac differentiation was evaluated by flow cytometry and RT-qPCR. Generated hPSC-CMs were characterised using immunocytochemistry, electrophysiology, electron microscopy, and calcium transient measurements. Our data show that the COX inhibitors Sulindac and Diclofenac in combination with CHIR99021 (GSK-3 inhibitor) efficiently induce cardiac differentiation of hPSCs. In addition, inhibition of COX using siRNAs targeted towards COX-1 and/or COX-2 showed that inhibition of COX-2 alone or COX-1 and COX-2 in combination induce cardiomyogenesis in hPSCs within 12 days. Using IMR90-Wnt reporter line, we showed that inhibition of COX-2 led to downregulation of Wnt signalling activity in hPSCs. In conclusion, this study demonstrates that COX inhibition efficiently induced cardiogenesis via modulation of COX and Wnt pathway and the generated cardiomyocytes express cardiac-specific structural markers as well as exhibit typical calcium transients and action potentials. These cardiomyocytes also responded to cardiotoxicants and can be relevant as an in vitro cardiotoxicity screening model.
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Affiliation(s)
- Harshal Nemade
- Institute of Neurophysiology, Faculty of Medicine, University of Cologne, Robert-Koch-Str. 39, 50931 Cologne, Germany; (H.N.); (A.A.); (U.C.); (E.N.); (F.N.); (J.H.); (S.P.)
| | - Aviseka Acharya
- Institute of Neurophysiology, Faculty of Medicine, University of Cologne, Robert-Koch-Str. 39, 50931 Cologne, Germany; (H.N.); (A.A.); (U.C.); (E.N.); (F.N.); (J.H.); (S.P.)
| | - Umesh Chaudhari
- Institute of Neurophysiology, Faculty of Medicine, University of Cologne, Robert-Koch-Str. 39, 50931 Cologne, Germany; (H.N.); (A.A.); (U.C.); (E.N.); (F.N.); (J.H.); (S.P.)
| | - Erastus Nembo
- Institute of Neurophysiology, Faculty of Medicine, University of Cologne, Robert-Koch-Str. 39, 50931 Cologne, Germany; (H.N.); (A.A.); (U.C.); (E.N.); (F.N.); (J.H.); (S.P.)
| | - Filomain Nguemo
- Institute of Neurophysiology, Faculty of Medicine, University of Cologne, Robert-Koch-Str. 39, 50931 Cologne, Germany; (H.N.); (A.A.); (U.C.); (E.N.); (F.N.); (J.H.); (S.P.)
| | - Nicole Riet
- Department I Internal Medicine and Center for Molecular Medicine Cologne (CMMC), University of Cologne (UKK), Robert-Koch-Str. 21, 50931 Cologne, Germany;
| | - Hinrich Abken
- Regensburg Centre for Interventional Immunology (RCI), Deptartment Genetic Immunotherapy, University Hospital Regensburg, 93053 Regensburg, Germany;
| | - Jürgen Hescheler
- Institute of Neurophysiology, Faculty of Medicine, University of Cologne, Robert-Koch-Str. 39, 50931 Cologne, Germany; (H.N.); (A.A.); (U.C.); (E.N.); (F.N.); (J.H.); (S.P.)
| | - Symeon Papadopoulos
- Institute of Neurophysiology, Faculty of Medicine, University of Cologne, Robert-Koch-Str. 39, 50931 Cologne, Germany; (H.N.); (A.A.); (U.C.); (E.N.); (F.N.); (J.H.); (S.P.)
| | - Agapios Sachinidis
- Institute of Neurophysiology, Faculty of Medicine, University of Cologne, Robert-Koch-Str. 39, 50931 Cologne, Germany; (H.N.); (A.A.); (U.C.); (E.N.); (F.N.); (J.H.); (S.P.)
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Robert-Koch-Str. 21, 50931 Cologne, Germany
- Correspondence: ; Tel.: +49-0221-4787373
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Bilanda DC, Bidingha RÀG, Djomeni Dzeufiet PD, Fouda YB, Ngapout RF, Tcheutchoua Y, Owona PE, Njonte Wouamba SC, Tanfack Tatchou L, Dimo T, Kamtchouing P. Antihypertensive and antidiabetic activities of Erythrina senegalensis DC (Fabaceae) stem bark aqueous extract on diabetic hypertensive rats. JOURNAL OF ETHNOPHARMACOLOGY 2020; 246:112200. [PMID: 31472272 DOI: 10.1016/j.jep.2019.112200] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 08/23/2019] [Accepted: 08/27/2019] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Erythrina senegalensis is traditionally used in Cameroon for its relaxing and hypoglycemic properties in the treatment of cardiovascular diseases and diabetes. AIM OF THE STUDY High blood pressure and diabetes mellitus are frequently linked. These pathologies represent major risk factors for cardiovascular and renal diseases. The present study was designed to evaluate the antidiabetic and antihypertensive activity of the stem bark of Erythrina senegalensis aqueous extract in male hypertensive diabetic rats (HDR). MATERIALS AND METHODS Hypertension and diabetes were induced by oral administration of sucrose (15%) and ethanol (40°) at doses of 1.5 g/kg and 5 g/kg respectively for 30 days, followed by an intravenous injection of streptozotocin (STZ; 40 mg/kg). A control group of 5 rats received distilled water (10 mL/kg) followed by intravenous injection of 0.9% NaCl (1 mL/100 g). HDR were divided into 4 groups of 5 rats each according to their blood glucose level and continued to receive ethanol in association with: distilled water (10 mL/kg); group I, metformin (200 mg/kg)+nifedipine (10 mg/kg); group II, plant extract (100 and 200 mg/kg) group IV and V, respectively for 28 days. At the end of the treatment, hemodynamic parameters were recorded by the direct method. Animals were sacrificed; blood and organs (aorta, heart, liver, and kidneys) were collected for biochemical and histological analysis. Phytochemistry and HPLC-DAD-HRESI-MS were used to determine the major compounds of the extract. RESULTS The administration of sucrose, alcohol, and STZ resulted in a significant increase in blood glucose, hemodynamic parameters, and body weight loss. A significant decrease in pancreatic islets size, nitrite, GSH, SOD and catalase activity was observed in HDR. There was also a significant increase in serum triglycerides, total cholesterol, creatinine, bilirubin, and transaminases activity in HDR. The aqueous extract of E. senegalensis, as well as the metformin + nifedipine combination, significantly improved all these parameters. HPLC coupled to both diode array and mass spectrometry detectors revealed the presence of 15 compounds and 11 of them were identified. CONCLUSION These results suggest that the aqueous extract of E. senegalensis possess antihypertensive, hypoglycemic, hypolipidemic, cardiomodulator and antioxidant properties involved in the improvement of the metabolic disorders found in HDR. This may be due at least in part to the presence of Erysenegalensein (D, O, N, E), Warangalone, senegalensin and 6,8-diprenylgenistein identified in the extract.
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Affiliation(s)
- Danielle Claude Bilanda
- Laboratory of Animal Physiology, Department of Animal Biology, Faculty of Science, University of Yaoundé I, PO Box 812, Yaoundé, Cameroon.
| | - Ronald À Goufani Bidingha
- Laboratory of Animal Physiology, Department of Animal Biology, Faculty of Science, University of Yaoundé I, PO Box 812, Yaoundé, Cameroon
| | - Paul Désiré Djomeni Dzeufiet
- Laboratory of Animal Physiology, Department of Animal Biology, Faculty of Science, University of Yaoundé I, PO Box 812, Yaoundé, Cameroon
| | - Yannick Bekono Fouda
- Laboratory of Animal Physiology, Department of Animal Biology, Faculty of Science, University of Yaoundé I, PO Box 812, Yaoundé, Cameroon
| | - Rodrigue Fifen Ngapout
- Laboratory of Animal Physiology, Department of Animal Biology, Faculty of Science, University of Yaoundé I, PO Box 812, Yaoundé, Cameroon
| | - Yannick Tcheutchoua
- Laboratory of Animal Physiology, Department of Animal Biology, Faculty of Science, University of Yaoundé I, PO Box 812, Yaoundé, Cameroon
| | - Pascal Emmanuel Owona
- Laboratory of Animal Physiology, Department of Animal Biology, Faculty of Science, University of Yaoundé I, PO Box 812, Yaoundé, Cameroon
| | - Steven Collins Njonte Wouamba
- Laboratory of Natural Substances Chemistry, Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, PO Box 812, Yaoundé, Cameroon
| | - Lucie Tanfack Tatchou
- Laboratory of Animal Physiology, Department of Animal Biology, Faculty of Science, University of Yaoundé I, PO Box 812, Yaoundé, Cameroon
| | - Théophile Dimo
- Laboratory of Animal Physiology, Department of Animal Biology, Faculty of Science, University of Yaoundé I, PO Box 812, Yaoundé, Cameroon
| | - Pierre Kamtchouing
- Laboratory of Animal Physiology, Department of Animal Biology, Faculty of Science, University of Yaoundé I, PO Box 812, Yaoundé, Cameroon
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Eldabah N, Nembo EN, Penner M, Semmler J, Swelem R, Hassab A, Molcanyi M, Hescheler J, Nguemo F. Altered Functional Expression of β-Adrenergic Receptors in Rhesus Monkey Embryonic Stem Cell-Derived Cardiomyocytes. Stem Cells Dev 2018; 27:336-346. [PMID: 29233068 DOI: 10.1089/scd.2017.0053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Pluripotent stem cells have demonstrated the potential to generate large numbers of functional cardiomyocytes (CMs) from different cell sources. Besides Wnt signaling, additional pathways are involved in early cardiac development and function. To date however, no study exists showing the effects of perturbing the canonical Wnt pathway using nonhuman primate embryonic stem (ES) cells. In this study, we investigated the effect of canonical Wnt inhibition during differentiation of nonhuman primate ES cell-derived CMs under defined, growth factor conditions. Rhesus monkey ES (rES) cells were differentiated into spontaneously beating CMs in the absence (control) or presence (treated) of Wnt inhibitor Dickkopf1 (DKK1), vascular endothelial growth factor, and basic fibroblast growth factor combined or added in a sequential manner during differentiation. Quantification and functional characterization of CMs were assessed by molecular and electrophysiological techniques. Analysis revealed no difference in average ratio of spontaneously beating clusters in both control and treated groups. However, the percentage of CMs was significantly reduced and the expressions of specific cardiac markers tested were also decreased in the treated group. Interestingly, we found that in CMs obtained from treated group, β-adrenergic receptors (β-ARs) were less expressed, their function was altered and electrophysiological studies revealed differences in action potential responsiveness to β-AR stimulation. We demonstrated that the Wnt/β-catenin pathway inhibitor, DKK1 associated with other growth factors repressed functional expression of β-ARs in rES cell-derived CMs. Thus, control of this pathway in each cell line and source is important for proper basic research and further cell therapy applications.
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Affiliation(s)
- Nermeen Eldabah
- 1 Institute of Neurophysiology, University of Cologne , Cologne, Germany .,2 Department of Clinical and Chemical Pathology, Medical Faculty, University of Alexandria , Alexandria, Egypt
| | | | - Marina Penner
- 3 Clinic of Neurosurgery, Medical Faculty, University of Cologne , Cologne, Germany
| | - Judith Semmler
- 1 Institute of Neurophysiology, University of Cologne , Cologne, Germany
| | - Rania Swelem
- 2 Department of Clinical and Chemical Pathology, Medical Faculty, University of Alexandria , Alexandria, Egypt
| | - Amina Hassab
- 2 Department of Clinical and Chemical Pathology, Medical Faculty, University of Alexandria , Alexandria, Egypt
| | - Marek Molcanyi
- 1 Institute of Neurophysiology, University of Cologne , Cologne, Germany
| | - Jürgen Hescheler
- 1 Institute of Neurophysiology, University of Cologne , Cologne, Germany
| | - Filomain Nguemo
- 1 Institute of Neurophysiology, University of Cologne , Cologne, Germany
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Peinkofer G, Hescheler J, Halbach M. Murine Short Axis Ventricular Heart Slices for Electrophysiological Studies. J Vis Exp 2017. [PMID: 28605368 DOI: 10.3791/55725] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Murine cardiomyocytes have been extensively used for in vitro studies of cardiac physiology and new therapeutic strategies. However, multicellular preparations of dissociated cardiomyocytes are not representative of the complex in vivo structure of cardiomyocytes, non-myocytes and extracellular matrix, which influences both mechanical and electrophysiological properties of the heart. Here we describe a technique to prepare viable ventricular slices of adult mouse hearts with a preserved in vivo like tissue structure, and demonstrate their suitability for electrophysiological recordings. After excision of the heart, ventricles are separated from the atria, perfused with Ca2+-free solution containing 2,3-butanedione monoxime and embedded in a 4% low-melt agarose block. The block is placed on a microtome with a vibrating blade, and tissue slices with a thickness of 150-400 µm are prepared keeping the vibration frequency of the blade at 60-70 Hz and moving the blade forward as slowly as possible. Thickness of the slices depends on the further application. Slices are stored in ice cold Tyrode's solution with 0.9 mM Ca2+ and 2,3-butanedione monoxime (BDM) for 30 min. Afterwards, slices are transferred to 37 °C DMEM for 30 min to wash out the BDM. Slices can be used for electrophysiological studies with sharp electrodes or micro electrode arrays, for force measurements to analyze contractile function or to investigate the interaction of transplanted stem cell-derived cardiomyocytes and host tissue. For sharp electrode recordings, a slice is placed into a 3 cm cell culture dish on the heating plate of an inverted microscope. The slice is stimulated with a unipolar electrode, and intracellular action potentials of cardiomyocytes within the slice are recorded with a sharp glass electrode.
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Affiliation(s)
- Gabriel Peinkofer
- Department of Internal Medicine III, University of Cologne; Institute for Neurophysiology, University of Cologne
| | | | - Marcel Halbach
- Department of Internal Medicine III, University of Cologne;
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Fatima A, Xu G, Nguemo F, Kuzmenkin A, Burkert K, Hescheler J, Šarić T. Murine transgenic iPS cell line for monitoring and selection of cardiomyocytes. Stem Cell Res 2016; 17:266-272. [PMID: 27879210 DOI: 10.1016/j.scr.2016.07.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/01/2016] [Revised: 06/20/2016] [Accepted: 07/19/2016] [Indexed: 10/21/2022] Open
Abstract
We report here a transgenic murine induced pluripotent stem cell (iPSC) line expressing puromycin N-acetyltransferase (PAC) and enhanced green fluorescent protein (EGFP) under the control of α-myosin heavy chain promoter. This transgenic cell line reproducibly differentiates into EGFP-expressing cardiomyocytes (CMs) which can be generated at high purity with puromycin treatment and exhibit molecular and functional properties of immature heart muscle cells. This genetically modified iPSC line can be used for assessment of the utility of CMs for myocardial repair, pharmacological and toxicological applications and development of improved cardiac differentiation protocols.
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Affiliation(s)
- Azra Fatima
- Center for Physiology and Pathophysiology, Institute for Neurophysiology, Medical Faculty, University of Cologne, Cologne, Germany
| | - Guoxing Xu
- Center for Physiology and Pathophysiology, Institute for Neurophysiology, Medical Faculty, University of Cologne, Cologne, Germany
| | - Filomain Nguemo
- Center for Physiology and Pathophysiology, Institute for Neurophysiology, Medical Faculty, University of Cologne, Cologne, Germany
| | - Alexey Kuzmenkin
- Center for Physiology and Pathophysiology, Institute for Neurophysiology, Medical Faculty, University of Cologne, Cologne, Germany
| | - Karsten Burkert
- Center for Physiology and Pathophysiology, Institute for Neurophysiology, Medical Faculty, University of Cologne, Cologne, Germany
| | - Jürgen Hescheler
- Center for Physiology and Pathophysiology, Institute for Neurophysiology, Medical Faculty, University of Cologne, Cologne, Germany
| | - Tomo Šarić
- Center for Physiology and Pathophysiology, Institute for Neurophysiology, Medical Faculty, University of Cologne, Cologne, Germany.
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Alkaloids in Erythrina by UPLC-ESI-MS and In Vivo Hypotensive Potential of Extractive Preparations. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015; 2015:959081. [PMID: 26356581 PMCID: PMC4556073 DOI: 10.1155/2015/959081] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 07/19/2015] [Accepted: 07/28/2015] [Indexed: 11/17/2022]
Abstract
Erythrina species are used in popular medicine as sedative, anxiolytic, anti-inflammatory, and antihypertensive. In this work, we investigated the chemical composition of extracts obtained from leaves of E. falcata and E. crista-galli. The hypotensive potential of E. falcata and the mechanism of action were also studied. The extracts were obtained by maceration and infusion. The total content of phenolic compounds and flavonoids was estimated by spectrophotometric methods. The chemical constituents were studied performing a chromatographic analysis by UPLC-ESI-MS. For in vivo protocols, blood pressure and heart rate were measured by the invasive hemodynamic monitoring method. Different concentrations of extracts and drugs such as L-NAME, losartan, hexamethonium, and propranolol were administrated i.v. The results of total phenolic contents for E. falcata and E. crista-galli were 1.3193-1.4989 mgGAE/mL for maceration and 0.8771-0.9506 mgGAE/mL for infusion. In total flavonoids, the content was 7.7829-8.1976 mg RE/g for maceration and 9.3471-10.4765 RE mg/g for infusion. The chemical composition was based on alkaloids, suggesting the presence of erythristemine, 11β-methoxyglucoerysodine, erysothiopine, 11β-hydroxyerysodine-glucose, and 11-hydroxyerysotinone-rhamnoside. A potent dose-dependent hypotensive effect was observed for E. falcata, which may be related to the route of β-adrenergic receptors.
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