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Li Y, Zhang W, Zhao J, Li S, Shan L, Zhu J, Li Y, Zhu H, Mao Q, Xia H. Establishing a dual knock-out cell line by lentivirus based combined CRISPR/Cas9 and Loxp/Cre system. Cytotechnology 2018; 70:1595-1605. [PMID: 30173403 DOI: 10.1007/s10616-018-0252-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 08/23/2018] [Indexed: 10/28/2022] Open
Abstract
The clustered regulatory interspersed short palindromic repeat (CRISPR)/CRISPR-associated protein (Cas) system has been widely used for gene knock-out. Lentiviral vectors have been commonly used as a delivery method for this system, however, prolonged Cas9/sgRNA expression due to lentiviral integration can lead to accumulating off-target mutations. To solve this issue in engineering a gene knock-out cell line, this study established a novel system, which was composed of two lentiviral vectors. One lentiviral vector carried simultaneously sgRNAs and CRISPR/Cas9 expression cassettes targeting single or multiple gene(s); the other lentiviral vector carried Cre that could remove excess sgRNAs and Cas9 expression cassettes in the genome after gene targeting was achieved. To prove the principle, two candidate genes, extracellular matrix protein 1 (ECM1) and progranulin (PGRN), both highly expressed in MDA-MB-231 cells, were selected for testing the novel system. A dual knock-out of ECM1 and PGRN was successfully achieved in MDA-MB-231 cell line, with the sgRNAs and Cas9 expression cassettes being removed by Cre. This system should have great potential in applications for multiple genes knock-out in vitro.
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Affiliation(s)
- Ya Li
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, Shaanxi, People's Republic of China
| | - Weifeng Zhang
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, Shaanxi, People's Republic of China
| | - Junli Zhao
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, Shaanxi, People's Republic of China
| | - Sai Li
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, Shaanxi, People's Republic of China
| | - Linlin Shan
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, Shaanxi, People's Republic of China
| | - Jiuling Zhu
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, Shaanxi, People's Republic of China
| | - Yan Li
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, Shaanxi, People's Republic of China
| | - He Zhu
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, Shaanxi, People's Republic of China
| | - Qinwen Mao
- Department of Pathology, Northwestern University Feinberg School of Medicine, 303 E. Chicago Avenue, Ward 3-140, Chicago, IL, 60611, USA
| | - Haibin Xia
- Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, Shaanxi, People's Republic of China.
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Kuntz LA, Rossetti L, Kunold E, Schmitt A, von Eisenhart-Rothe R, Bausch AR, Burgkart RH. Biomarkers for tissue engineering of the tendon-bone interface. PLoS One 2018; 13:e0189668. [PMID: 29298298 PMCID: PMC5751986 DOI: 10.1371/journal.pone.0189668] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 11/29/2017] [Indexed: 02/07/2023] Open
Abstract
The tendon-bone interface (enthesis) is a highly sophisticated biomaterial junction that allows stress transfer between mechanically dissimilar materials. The enthesis encounters very high mechanical demands and the regenerative capacity is very low resulting in high rupture recurrence rates after surgery. Tissue engineering offers the potential to recover the functional integrity of entheses. However, recent enthesis tissue engineering approaches have been limited by the lack of knowledge about the cells present at this interface. Here we investigated the cellular differentiation of enthesis cells and compared the cellular pattern of enthesis cells to tendon and cartilage cells in a next generation sequencing transcriptome study. We integrated the transcriptome data with proteome data of a previous study to identify biomarkers of enthesis cell differentiation. Transcriptomics detected 34468 transcripts in total in enthesis, tendon, and cartilage. Transcriptome comparisons revealed 3980 differentially regulated candidates for enthesis and tendon, 395 for enthesis and cartilage, and 946 for cartilage and tendon. An asymmetric distribution of enriched genes was observed in enthesis and cartilage transcriptome comparison suggesting that enthesis cells are more chondrocyte-like than tenocyte-like. Integrative analysis of transcriptome and proteome data identified ten enthesis biomarkers and six tendon biomarkers. The observed gene expression characteristics and differentiation markers shed light into the nature of the cells present at the enthesis. The presented markers will foster enthesis tissue engineering approaches by setting a bench-mark for differentiation of seeded cells towards a physiologically relevant phenotype.
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Affiliation(s)
- Lara A. Kuntz
- Klinik für Orthopädie und Sportorthopädie, Klinikum rechts der Isar, Technische Universität München, München, Germany
- Lehrstuhl für Zellbiophysik, Technische Universität München, Garching, Germany
| | - Leone Rossetti
- Lehrstuhl für Zellbiophysik, Technische Universität München, Garching, Germany
| | - Elena Kunold
- Center for Integrated Protein Science (CIPSM), Department of Chemistry, Technische Universität München, Garching, Germany
| | - Andreas Schmitt
- Klinik für Orthopädie und Sportorthopädie, Klinikum rechts der Isar, Technische Universität München, München, Germany
| | - Ruediger von Eisenhart-Rothe
- Klinik für Orthopädie und Sportorthopädie, Klinikum rechts der Isar, Technische Universität München, München, Germany
| | - Andreas R. Bausch
- Lehrstuhl für Zellbiophysik, Technische Universität München, Garching, Germany
| | - Rainer H. Burgkart
- Klinik für Orthopädie und Sportorthopädie, Klinikum rechts der Isar, Technische Universität München, München, Germany
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Li Y, Li Y, Zhao J, Zheng X, Mao Q, Xia H. Development of a Sensitive Luciferase-Based Sandwich ELISA System for the Detection of Human Extracellular Matrix 1 Protein. Monoclon Antib Immunodiagn Immunother 2016; 35:273-279. [PMID: 27923104 DOI: 10.1089/mab.2016.0033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Enzyme-linked immunosorbent assay (ELISA) has been one of the main methods for detecting an antigen in an aqueous sample for more than four decades. Nowadays, one of the biggest concerns for ELISA is still how to improve the sensitivity of the assay, and the luciferase-luciferin reaction system has been noticed as a new detection method with high sensitivity. In this study, a luciferin-luciferase reaction system was used as the detection method for a sandwich ELISA system. It was shown that this new system led to an increase in the detection sensitivity of at least two times when compared with the traditional horseradish peroxidase (HRP) detection method. Lastly, the serum levels of the human extracellular matrix 1 protein of breast cancer patients were determined by the new system, which were overall similar to the HRP chemiluminescent system. Furthermore, this new luciferase reporter can be implemented into other ELISA systems for the purpose of increasing the assay sensitivity.
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Affiliation(s)
- Ya Li
- 1 Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University , Xi'an, P.R. China
| | - Yanqing Li
- 1 Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University , Xi'an, P.R. China
| | - Junli Zhao
- 1 Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University , Xi'an, P.R. China
| | - Xiaojing Zheng
- 1 Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University , Xi'an, P.R. China
| | - Qinwen Mao
- 2 Department of Pathology, Northwestern University Feinberg School of Medicine Chicago , Chicago, Illinois
| | - Haibin Xia
- 1 Laboratory of Gene Therapy, Department of Biochemistry, College of Life Sciences, Shaanxi Normal University , Xi'an, P.R. China
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