scholarly journals Glycan Epitopes on 201B7 Human-Induced Pluripotent Stem Cells Using R-10G and R-17F Marker Antibodies

Biomolecules ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 508
Author(s):  
Yuko Nagai ◽  
Hiromi Nakao ◽  
Aya Kojima ◽  
Yuka Komatsubara ◽  
Yuki Ohta ◽  
...  
Keyword(s):  
Stem Cell ◽  
Human Embryonic Stem Cell ◽  
Broad Band ◽  
Embryonic Stem ◽  
Induced Pluripotent Stem Cell ◽  
Keratan Sulfate ◽  
Affinity Column ◽  
Liquid Chromatography Mass Spectrometry ◽  
Induced Pluripotent ◽  
Blue Native

We developed two human-induced pluripotent stem cell (hiPSC)/human embryonic stem cell (hESC)-specific glycan-recognizing mouse antibodies, R-10G and R-17F, using the Tic (JCRB1331) hiPSC line as an antigen. R-10G recognizes a low-sulfate keratan sulfate, and R-17F recognizes lacto-N-fucopentaose-1. To evaluate the general characteristics of stem cell glycans, we investigated the hiPSC line 201B7 (HPS0063), a prototype iPSC line. Using an R-10G affinity column, an R-10G-binding protein was isolated from 201B7 cells. The protein yielded a single but very broad band from 480 to 1236 kDa by blue native gel electrophoresis. After trypsin digestion, the protein was identified as podocalyxin by liquid chromatography/mass spectrometry. According to Western blotting, the protein reacted with R-10G and R-17F. The R-10G-positive band was resistant to digestion with glycan-degrading enzymes, including peptide N-glycanase, but the intensity of the band was decreased significantly by digestion with keratanase, keratanase II, and endo-β-galactosidase, suggesting the R-10G epitope to be a keratan sulfate. These results suggest that keratan sulfate-type epitopes are shared by hiPSCs. However, the keratan sulfate from 201B7 cells contained a polylactosamine disaccharide unit (Galβ1-4GlcNAc) at a significant frequency, whereas that from Tic cells consisted mostly of keratan sulfate disaccharide units (Galβ1-4GlcNAc(6S)). In addition, the abundance of the R-10G epitope was significantly lower in 201B7 cells than in Tic cells.

Abstract 16007: Functional Comparison of Human Embryonic Stem Cell- versus Human Induced Pluripotent Stem Cell-Derived Cardiomyocytes in Rat Ischemic Myocardial Infarction Model

Circulation ◽  
2014 ◽  
Vol 130 (suppl_2) ◽  
Author(s):  
Wenyi Chen ◽  
Johannes Riegler ◽  
Elena Matsa ◽  
Qi Shen ◽  
Haodi Wu ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Stem Cell ◽  
Cardiac Function ◽  
Embryonic Stem Cell ◽  
Pluripotent Stem Cell ◽  
Human Embryonic Stem Cell ◽  
Embryonic Stem ◽  
Induced Pluripotent Stem Cell ◽  
Left Ventricular ◽  
Induced Pluripotent

Introduction: Both human embryonic stem cell-derived cardiomyocytes (ESC-CMs) and human induced pluripotent stem cell-derived cardiomyocytes (iPSC-CMs) can serve as an unlimited cell source for cardiac regenerative therapy. However, the functional equivalency of both approaches has not been previously reported. Here we performed head-to-head comparison on the beneficial effects of ESC-CM and iPSC-CMs in restoring cardiac function in a rat myocardial infarction (MI) model. Methods & Results: Human ESCs and iPSCs were differentiated into cardiomyocytes using small molecules. FACS analysis confirmed ~85% and ~83% of cells differentiated from ESCs and iPSCs, respectively, were positive for cardiac troponin T, and immunofluorescence staining demonstrated that ESC-CMs and iPSC-CMs have striated sarcomeric structure (Figure A-B). Both ESC-CMs and iPSC-CMs displayed similar maturity for calcium handling (transient amplitude: ΔF/F 0 = 3.8±0.3; time to peak: ~200 ms; 50% transient duration: ~400 ms). qRT-PCR showed that ESC-CMs and iPSC-CMs expressed CASQ2, GJA5, KCNJ2, KCNJ5, MYH6, MYH7, and SCN5A at comparable levels to human fetal heart tissue. Next, ESC-CMs and iPSC-CMs were injected into the left ventricular free wall of infarcted hearts (adult nude rats; n=14, 10, respectively). Cardiac function was assessed by MRI one month post cell injection and the hearts were harvested and stained for human cardiac markers. Both ESC-CMs and iPSC-CMs could engraft in ischemic rat hearts (Figure C). Comprehensive functional analysis with small animal magnetic resonance imaging (MRI), echocardiography, and pressure-volume loop analysis are underway. Conclusion: We set out to perform head to head comparison for the first time that iPSC-CMs may facilitate cardiac repair at comparable levels to ESC-CMs. Unlike allogeneic ESC-CM therapy, autologous iPSC-CMs could be used to overcome immune rejection for cardiac cell transplantation in the future.

scholarly journals Limited Gene Expression Variation in Human Embryonic Stem Cell and Induced Pluripotent Stem Cell-Derived Endothelial Cells

Stem Cells ◽  
2012 ◽  
Vol 31 (1) ◽  
pp. 92-103 ◽  
Author(s):  
Mark P. White ◽  
Abdul J. Rufaihah ◽  
Lei Liu ◽  
Yohannes T. Ghebremariam ◽  
Kathryn N. Ivey ◽  
...  
Keyword(s):  
Gene Expression ◽  
Endothelial Cells ◽  
Stem Cell ◽  
Pluripotent Stem Cell ◽  
Human Embryonic Stem Cell ◽  
Embryonic Stem ◽  
Induced Pluripotent Stem Cell ◽  
Gene Expression Variation ◽  
Expression Variation ◽  
Induced Pluripotent

scholarly journals Induced Pluripotent Stem Cell as a New Source for Cancer Immunotherapy

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Farzaneh Rami ◽  
Halimeh Mollainezhad ◽  
Mansoor Salehi
Keyword(s):  
Stem Cell ◽  
Immune System ◽  
Cancer Immunotherapy ◽  
Immune Cells ◽  
Pluripotent Stem Cell ◽  
Ex Vivo ◽  
Embryonic Stem ◽  
Induced Pluripotent Stem Cell ◽  
Protective Function ◽  
Induced Pluripotent

The immune system consists of cells, proteins, and other molecules that beside each other have a protective function for the host against foreign pathogens. One of the most essential features of the immune system is distinguishability between self- and non-self-cells. This function has an important role in limiting development and progression of cancer cells. In this case, the immune system can detect tumor cell as a foreign pathogen; so, it can be effective in elimination of tumors in their early phases of development. This ability of the immune system resulted in the development of a novel therapeutic field for cancer treatment using host immune components which is called cancer immunotherapy. The main purpose of cancer immunotherapy is stimulation of a strong immune response against the tumor cells that can result from expressing either the immune activator cytokines in the tumor area or gene-modified immune cells. Because of the problems of culturing and manipulating immune cells ex vivo, in recent years, embryonic stem cell (ESC) and induced pluripotent stem cell (iPSC) have been used as new sources for generation of modified immune stimulatory cells. In this paper, we reviewed some of the progressions in iPSC technology for cancer immunotherapy.

scholarly journals A Novel Purification Method of Murine Embryonic Stem Cell– and Human-Induced Pluripotent Stem Cell–Derived Cardiomyocytes by Simple Manual Dissociation

2012 ◽  
Vol 17 (5) ◽  
pp. 683-691 ◽  
Author(s):  
Tadahiro Shinozawa ◽  
Hatsue Furukawa ◽  
Eimei Sato ◽  
Kenji Takami
Keyword(s):  
Stem Cells ◽  
Stem Cell ◽  
Embryonic Stem Cell ◽  
Pluripotent Stem Cell ◽  
Embryonic Stem ◽  
Induced Pluripotent Stem Cell ◽  
Drug Induced ◽  
Thin Glass ◽  
Murine Embryonic Stem Cell ◽  
Induced Pluripotent

Cardiomyocytes derived from embryonic stem cells (ES-CMs) and induced pluripotent stem cells (iPS-CMs) are useful for toxicity and pharmacology screening. In the present study, we found that cardiomyocyte-rich beating cell clusters (CCs) emerged from murine embryonic stem cell (mESC)–derived beating EBs and from human-induced pluripotent stem cell (hiPSC)–derived beating EBs dissociated by gentle pipetting with a thin glass pipette. The percentage of cardiac troponin T (cTnT)–positive cells in the beating CCs obtained from mESC-derived and hiPSC-derived beating EBs was higher (81.5% and 91.6%, respectively) than in beating-undissociated EBs (13.7% and 67.1%, respectively). For mESCs, the yield of cTnT-positive cells from beating CCs was estimated to be 1.6 times higher than that of beating EBs. The bromodeoxyuridine labeling index of mouse ES-CMs and human iPS-CMs in beating CCs was 1.5- and 3.2-fold, respectively, greater than those in beating EBs. To investigate the utility of the cells in toxicity assessment, we showed that doxorubicin, a cardiotoxic drug, induced myofilament disruption in cardiomyocytes isolated by this method. This simple method enables preparation of mouse ES-CMs and human iPS-CMs with better proliferative activity than beating EBs not dissociated by pipetting, and the cardiomyocytes are useful for drug-induced myocardial toxicity testing.

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