2
|
Liu C, Cui Z, Yan Y, Wu NL, Li L, Ying Q, Peng L. An optimized proliferation system of embryonic stem cells for generating the rat model with large fragment modification. Biochem Biophys Res Commun 2021; 571:8-13. [PMID: 34298338 DOI: 10.1016/j.bbrc.2021.07.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Accepted: 07/15/2021] [Indexed: 11/25/2022]
Abstract
Rats have long been an ideal model for disease research in the field of biomedicine, but the bottleneck of in vitro culture of rat embryonic stem (ES) cells hindered the wide application as genetic disease models. Here, we optimized a special medium which we named 5N-medium for rat embryonic stem cells, which improved the in vitro cells with better morphology and higher pluripotency. We then established a drug selection schedule harboring a prior selection of 12 h that achieved a higher positive selection ratio. These treatments induced at least 50% increase of homologous recombination efficiency compared with conventional 2i culture condition. Moreover, the ratio of euploid ES clones also increased by 50% with a higher germline transmission rate. Finally, we successfully knocked in a 175 kb human Bacterial Artificial Chromosome (BAC) fragment to rat ES genome through recombinase mediated cassette exchange (RMCE). Hence, we provide a promising system for generating sophisticated rat models which could be benefit for biomedical researches.
Collapse
Affiliation(s)
- Chang Liu
- Key Laboratory of Arrhythmias, Ministry of Education of China, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China; Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China; Department of Medical Genetics, Tongji University School of Medicine, Shanghai, 200092, China
| | - Zhonglin Cui
- Division of Hepatobiliopancreatic Surgery, Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China; Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research at USC, Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
| | - Youzhen Yan
- USC/Norris Cancer Center Transgenic/Knockout Rodent Core Facility, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
| | - Nancy L Wu
- USC/Norris Cancer Center Transgenic/Knockout Rodent Core Facility, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
| | - Li Li
- Key Laboratory of Arrhythmias, Ministry of Education of China, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China; Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China; Department of Medical Genetics, Tongji University School of Medicine, Shanghai, 200092, China; Research Units of Origin and Regulation of Heart Rhythm, Chinese Academy of Medical Sciences, Beijing, 100730, China.
| | - Qilong Ying
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research at USC, Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA; USC/Norris Cancer Center Transgenic/Knockout Rodent Core Facility, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA.
| | - Luying Peng
- Key Laboratory of Arrhythmias, Ministry of Education of China, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China; Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China; Department of Medical Genetics, Tongji University School of Medicine, Shanghai, 200092, China; Research Units of Origin and Regulation of Heart Rhythm, Chinese Academy of Medical Sciences, Beijing, 100730, China.
| |
Collapse
|
3
|
Said R, Zheng L, Saunders T, Zeidler M, Papagerakis S, Papagerakis P. Generation of Amelx-iCre Mice Supports Ameloblast-Specific Role for Stim1. J Dent Res 2019; 98:1002-1010. [PMID: 31329049 DOI: 10.1177/0022034519858976] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The identification and targeting of the molecular pathways regulating amelogenesis is an ongoing challenge in dental research, and progress has been restricted by the limited number of genetic tools available to study gene function in ameloblasts. Here, we generated 4 transgenic Cre-driver mouse lines that express improved Cre (iCre)-recombinase from the locus of the mouse ameloblast-specific gene amelogenin X (Amelx-iCre) with a large (250-kb) bacterial artificial chromosome DNA vector. All 4 Amelx-iCre transgenic lines were bred with ROSA26 reporter mice to characterize the iCre developmental pattern with the LacZ gene encoding β-galactosidase enzyme activity assay and Cre protein immunohistochemistry. From the 4 generated transgenic lines, 2 were selected for further analysis because they expressed a high amount of Cre recombinase exclusively in ameloblasts and showed developmental stage- and cell-specific β-galactosidase activity mimicking the endogenous amelogenin expression. To test the functionality of the selected transgenic models, we bred the 2 Amelx-iCre mice lines with stromal interaction molecule 1 (Stim1) floxed mice to generate ameloblast-specific Stim1 conditional knockout mice (Stim1 cKO). STIM1 protein serves as one of the main calcium sensors in ameloblasts and plays a major role in enamel mineralization and ameloblast differentiation. Amelx-iCre mice displayed exclusive CRE-mediated recombination in incisor and molar ameloblasts. Stim1 cKO mice showed a severely defected enamel phenotype, including reduced structural integrity concomitant with increased attrition and smaller teeth. The phenotype and genotype of the Amelx-iCre/Stim1 cKO showed significant differences with the previously reported Ker14-Cre/Stim1 cKO, highlighting the need for cell- and stage-specific Cre lines for an accurate phenotype-genotype comparison. Furthermore, our model has the advantage of carrying the entire Amelx gene locus rather than being limited to an Amelx partial promoter construct, which greatly enhances the stability and the specificity of our Cre expression. As such, the Amelx-iCre transgenic lines that we developed may serve as a powerful tool for targeting ameloblast-specific gene expression in future investigations.
Collapse
Affiliation(s)
- R Said
- 1 Department of Anatomy and Cell Biology, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada.,2 College of Dentistry, University of Saskatchewan, Saskatoon, SK, Canada
| | - L Zheng
- 3 Department of Orthodontics, School of Dentistry, Ohio State University, Columbus, OH, USA
| | - T Saunders
- 4 Transgenic Animal Model Core, University of Michigan, Ann Arbor, MI, USA
| | - M Zeidler
- 4 Transgenic Animal Model Core, University of Michigan, Ann Arbor, MI, USA
| | - S Papagerakis
- 5 Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Michigan, Ann Arbor, MI, USA.,6 Department of Surgery, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada
| | - P Papagerakis
- 1 Department of Anatomy and Cell Biology, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada.,2 College of Dentistry, University of Saskatchewan, Saskatoon, SK, Canada.,7 Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| |
Collapse
|
4
|
Bailer SM, Funk C, Riedl A, Ruzsics Z. Herpesviral vectors and their application in oncolytic therapy, vaccination, and gene transfer. Virus Genes 2017. [PMID: 28634751 DOI: 10.1007/s11262-017-1482-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Herpesviruses are enveloped DNA viruses that infect vertebrate cells. Their high potential cloning capacity and the lifelong persistence of their genomes in various host cells make them attractive platforms for vector-based therapy. In this review, we would like to highlight recent advances of three major areas of herpesvirus vector development and application: (i) oncolytic therapy, (ii) recombinant vaccines, and (iii) large capacity gene transfer vehicles.
Collapse
Affiliation(s)
- Susanne M Bailer
- Institute for Interfacial Engineering and Plasma Technology IGVP, University of Stuttgart, Nobelstrasse 12, 70569, Stuttgart, Germany. .,Fraunhofer-Institut für Grenzflächen- und Bioverfahrenstechnik IGB, Nobelstrasse 12, 70569, Stuttgart, Germany.
| | - Christina Funk
- Institute for Interfacial Engineering and Plasma Technology IGVP, University of Stuttgart, Nobelstrasse 12, 70569, Stuttgart, Germany.,Fraunhofer-Institut für Grenzflächen- und Bioverfahrenstechnik IGB, Nobelstrasse 12, 70569, Stuttgart, Germany
| | - André Riedl
- Department for Medical Microbiology and Hygiene, Institute of Virology, University Medical Center Freiburg, Hermann-Herder-Strasse 11, 79104, Freiburg, Germany.,German Center for Infection Research - DZIF, Freiburg, Germany
| | - Zsolt Ruzsics
- Department for Medical Microbiology and Hygiene, Institute of Virology, University Medical Center Freiburg, Hermann-Herder-Strasse 11, 79104, Freiburg, Germany. .,German Center for Infection Research - DZIF, Freiburg, Germany.
| |
Collapse
|