This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Research
mingyu Jiang
First Affiliated Hospital of Harbin Medical University
Corresponding Author
ORCiD: https://orcid.org/0000-0002-0359-0064
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Background
To investigate the influence of signal transducer and activator of transcription-3 (STAT3) on spinal cord tissue grafts of rat fetuses with spina bifida aperta. In particular, we wished to determine if STAT3 overexpression plasmid transfection would increase survival of spinal cord transplantation to improve therapeutic efficiency.
Methods
The fetal rat model of spina bifida aperta was established by retinoic acid and treated by microsurgical injection of stem cells. They were divided into blank control group (n = 12), negative control group (n = 10) and experimental group (n = 11). The optical density (OD) value of BMSCs viability was determined by Cell Counting Kit-8 (CCK-8). The expression of STAT3, pSTAT3, nerve markers (Glial fibrillary acidic protein, Neuron-specific enolase, Neurofilament and Nestin) and apoptosis related factors (Caspase 8 and Bcl-2) were tested by the method of real-time PCR and Western blot. All statistical analyses were performed using SPSS version 20.0 software. One-way analysis of variance was used to analyze differences among three or more groups. The data are presented as the mean ± standard deviation from at least three independent experiments. P < 0.05 was considered statistically significant.
Results
OD value in experimental group was the highest at 8 hours after transplantation by CCK-8, and then gradually decreased, which was statistically significant compared with blank control group and negative control group (P < 0.05). There was no statistical difference in OD peak time and value between blank control group and negative control group. The expression levels of pSTAT3, Glial fibrillary acidic protein, Neuron-specific enolase, Neurofilament and Nestin in experimental group were remarkably higher than those in blank control group and negative control group (P < 0.05), but STAT3 expression in experimental group were statistically decreased (P < 0.05). The relative expression levels of Caspase-8 and Bcl-2 in experimental group were tremendously lower than those in blank control group and negative control group (P < 0.05).
Conclusion
Transfection of recombinant lentivirus mediated STAT3 overexpression plasmid with BMSCs can improve the efficiency of transforming into neural cells and provide new seed cells for the treatment of congenital spina bifida aperta.
Keywords
bone marrow mesenchymal stem cells, spina bifida aperta, signal transducer and activator of transcription-3, lentivirus transfection, nerve cells
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This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Research
mingyu Jiang
First Affiliated Hospital of Harbin Medical University
Corresponding Author
ORCiD: https://orcid.org/0000-0002-0359-0064
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 04 Mar, 2021
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Neurology
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Background
To investigate the influence of signal transducer and activator of transcription-3 (STAT3) on spinal cord tissue grafts of rat fetuses with spina bifida aperta. In particular, we wished to determine if STAT3 overexpression plasmid transfection would increase survival of spinal cord transplantation to improve therapeutic efficiency.
Methods
The fetal rat model of spina bifida aperta was established by retinoic acid and treated by microsurgical injection of stem cells. They were divided into blank control group (n = 12), negative control group (n = 10) and experimental group (n = 11). The optical density (OD) value of BMSCs viability was determined by Cell Counting Kit-8 (CCK-8). The expression of STAT3, pSTAT3, nerve markers (Glial fibrillary acidic protein, Neuron-specific enolase, Neurofilament and Nestin) and apoptosis related factors (Caspase 8 and Bcl-2) were tested by the method of real-time PCR and Western blot. All statistical analyses were performed using SPSS version 20.0 software. One-way analysis of variance was used to analyze differences among three or more groups. The data are presented as the mean ± standard deviation from at least three independent experiments. P < 0.05 was considered statistically significant.
Results
OD value in experimental group was the highest at 8 hours after transplantation by CCK-8, and then gradually decreased, which was statistically significant compared with blank control group and negative control group (P < 0.05). There was no statistical difference in OD peak time and value between blank control group and negative control group. The expression levels of pSTAT3, Glial fibrillary acidic protein, Neuron-specific enolase, Neurofilament and Nestin in experimental group were remarkably higher than those in blank control group and negative control group (P < 0.05), but STAT3 expression in experimental group were statistically decreased (P < 0.05). The relative expression levels of Caspase-8 and Bcl-2 in experimental group were tremendously lower than those in blank control group and negative control group (P < 0.05).
Conclusion
Transfection of recombinant lentivirus mediated STAT3 overexpression plasmid with BMSCs can improve the efficiency of transforming into neural cells and provide new seed cells for the treatment of congenital spina bifida aperta.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
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