scholarly journals Embryonic Stem Cell-Derived Neurons Grown on Multi-Electrode Arrays as a Novel In vitro Bioassay for the Detection of Clostridium botulinum Neurotoxins

2017 ◽  
Vol 8 ◽  
Author(s):  
Stephen P. Jenkinson ◽  
Denis Grandgirard ◽  
Martina Heidemann ◽  
Anne Tscherter ◽  
Marc-André Avondet ◽  
...  
Keyword(s):  
Stem Cell ◽  
Embryonic Stem Cell ◽  
Clostridium Botulinum ◽  
Embryonic Stem ◽  
Electrode Arrays ◽  
In Vitro Bioassay ◽  
Botulinum Neurotoxins

Derivation of goat embryonic stem cell-like cell lines from in vitro produced parthenogenetic blastocysts

2013 ◽  
Vol 113 (1) ◽  
pp. 145-153 ◽  
Author(s):  
Arun Kumar De ◽  
Shweta Garg ◽  
Dinesh Kumar Singhal ◽  
Hrudananda Malik ◽  
Ayan Mukherjee ◽  
...  
Keyword(s):  
Stem Cell ◽  
Embryonic Stem Cell ◽  
Cell Lines ◽  
Embryonic Stem

In vitro recapitulation of the urea cycle using murine embryonic stem cell-derived in vitro liver model

Amino Acids ◽  
2013 ◽  
Vol 45 (6) ◽  
pp. 1343-1351 ◽  
Author(s):  
Miho Tamai ◽  
Mami Aoki ◽  
Akihito Nishimura ◽  
Koji Morishita ◽  
Yoh-ichi Tagawa
Keyword(s):  
Stem Cell ◽  
Embryonic Stem Cell ◽  
Urea Cycle ◽  
Embryonic Stem ◽  
Murine Embryonic Stem Cell ◽  
Liver Model

In vitro assessing the risk of drug-induced cardiotoxicity by embryonic stem cell-based biosensor

2011 ◽  
Vol 155 (1) ◽  
pp. 214-219 ◽  
Author(s):  
Qingjun Liu ◽  
Hui Yu ◽  
Zhou Tan ◽  
Hua Cai ◽  
Weiwei Ye ◽  
...  
Keyword(s):  
Stem Cell ◽  
Embryonic Stem Cell ◽  
Embryonic Stem ◽  
Drug Induced

In vitro differentiation of retinal ganglion-like cells from embryonic stem cell derived neural progenitors

2009 ◽  
Vol 380 (2) ◽  
pp. 230-235 ◽  
Author(s):  
Balusamy Jagatha ◽  
Mundackal S. Divya ◽  
Rajendran Sanalkumar ◽  
Chandrasekharan L. Indulekha ◽  
Sasidharan Vidyanand ◽  
...  
Keyword(s):  
Stem Cell ◽  
Embryonic Stem Cell ◽  
Embryonic Stem ◽  
Neural Progenitors ◽  
Retinal Ganglion ◽  
In Vitro Differentiation

Development of an in vitro cell-based bioassay for the detection of Clostridium botulinum neurotoxins by using mESC-derived neurons grown on multi electrode arrays

Toxicon ◽  
2016 ◽  
Vol 123 ◽  
pp. S44
Author(s):  
Stephen P. Jenkinson ◽  
Denis Grandgirard ◽  
Martina Heidemann ◽  
Anne Tscherter ◽  
Marc-André Avondet ◽  
...  
Keyword(s):  
Clostridium Botulinum ◽  
Electrode Arrays ◽  
Botulinum Neurotoxins

scholarly journals In vitro and in vivo analyses of human embryonic stem cell-derived dopamine neurons

2005 ◽  
Vol 92 (5) ◽  
pp. 1265-1276 ◽  
Author(s):  
Chang-Hwan Park ◽  
Yang-Ki Minn ◽  
Ji-Yeon Lee ◽  
Dong Ho Choi ◽  
Mi-Yoon Chang ◽  
...  
Keyword(s):  
Stem Cell ◽  
Embryonic Stem Cell ◽  
Human Embryonic Stem Cell ◽  
Embryonic Stem ◽  
Dopamine Neurons

Assessment of the ultrastructural and proliferative properties of human embryonic stem cell-derived cardiomyocytes

2003 ◽  
Vol 285 (6) ◽  
pp. H2355-H2363 ◽  
Author(s):  
Mirit Snir ◽  
Izhak Kehat ◽  
Amira Gepstein ◽  
Raymond Coleman ◽  
Joseph Itskovitz-Eldor ◽  
...  
Keyword(s):  
Cell Cycle ◽  
Stem Cell ◽  
Embryonic Stem Cell ◽  
Late Stage ◽  
Human Embryonic Stem Cell ◽  
Embryonic Stem ◽  
Es Cell ◽  
Cardiomyocyte Proliferation ◽  
Ki 67

Assessment of early ultrastructural development and cell-cycle regulation in human cardiac tissue is significantly hampered by the lack of a suitable in vitro model. Here we describe the possible utilization of human embryonic stem cell (ES) lines for investigation of these processes. With the use of the embryoid body (EB) differentiation system, human ES cell-derived cardiomyocytes at different developmental stages were isolated and their histomorphometric, ultrastructural, and proliferative properties were characterized. Histomorphometric analysis revealed an increase in cell length, area, and length-to-width ratio in late-stage EBs (>35 days) compared with early (10–21 days) and intermediate (21–35 days) stages. This was coupled with a progressive ultrastructural development from an irregular myofibrillar distribution to an organized sarcomeric pattern. Cardiomyocyte proliferation, assessed by double labeling with cardiac-specific antibodies and either [3H]thymidine incorporation or Ki-67 immunolabeling, demonstrated a gradual withdrawal from cell cycle. Hence, the percentage of positively stained nuclei in early-stage cardiomyocytes ([3H]thymidine: 60 ± 10%, Ki-67: 54 ± 23%) decreased to 36 ± 7% and 9 ± 16% in intermediate-stage EBs and to <1% in late-stage cardiomyocytes. In conclusion, a reproducible temporal pattern of early cardiomyocyte proliferation, cell-cycle withdrawal, and ultrastructural maturation was noted in this model. Establishment of this unique in vitro surrogate system may allow to examine the molecular mechanisms underlying these processes and to assess interventions aiming to modify these properties. Moreover, the detailed characterization of the ES cell-derived cardiomyocyte may be crucial for the development of future cell replacement strategies aiming to regenerate functional myocardium.

scholarly journals Shortening and Improving the Embryonic Stem Cell Test through the Use of Gene Biomarkers of Differentiation

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Andrea C. Romero ◽  
Eugenio Vilanova ◽  
Miguel A. Sogorb
Keyword(s):  
Gene Expression ◽  
Risk Assessment ◽  
Stem Cell ◽  
Cell Viability ◽  
Embryonic Stem Cell ◽  
Total Duration ◽  
Embryonic Stem ◽  
End Points ◽  
Cell Test

The embryonic Stem cell Test (EST) is a validated assay for testing embryotoxicityin vitro. The total duration of this protocol is 10 days, and its main end-point is based on histological determinations. It is suggested that improvements on EST must be focused toward molecular end-points and, if possible, to reduce the total assay duration. Five days of exposure of D3 cells in monolayers under spontaneous differentiation to 50 ng/mL of the strong embryotoxic 5-fluorouracil or to 75 μg/mL of the weak embryotoxic 5,5-diphenylhydeantoin caused between 20 and 74% of reductions in the expression of the following genes:Pnpla6,Afp,Hdac7,Vegfa, andNes. The exposure to 1 mg/mL of nonembryotoxic saccharin only caused statistically significant reductions in the expression ofNes. These exposures reduced cell viability of D3 cells by 15, 28, and 34%. We applied these records to the mathematical discriminating function of the EST method to find that this approach is able to correctly predict the embryotoxicity of all three above-mentioned chemicals. Therefore, this work proposes the possibility of improve EST by reducing its total duration and by introducing gene expression as biomarker of differentiation, which might be very interesting forin vitrorisk assessment embryotoxicity.

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