摘要
背景:哺乳动物细胞中的基因治疗需要表现出长期稳定性和高表达的载体。表位基因表达载体为整合到宿主细胞基因组中的那些提供了安全和有吸引力的替代。 材料与方法:在本研究中,我们开发了一个新的附加型载体基于绝缘子,鸡过敏网站4(cHS4)。将cHS4元件人工合成,克隆到pEGFP-C1载体中,用于转染中国仓鼠卵巢(CHO)和人Chang肝细胞。在存在或不存在G418选择的情况下进一步培养稳定转染的细胞集落。荧光原位杂交(FISH)分析和载体拯救实验表明载体在CHO和人Chang肝细胞中附加地复制。与由基质附着区序列介导的游离载体相比,含有cHS4元件的载体在长期培养期间产生增加的转基因表达水平,转染效率和稳定性。载体在细胞中以非常低的拷贝数存在,并且在没有选择压力的情况下稳定维持超过100代。 结论:总之,除了少数游离载体形式,含cHS4的载体主要在哺乳动物细胞中游离重复,并且在产生更高的表达水平和稳定性水平方面超出可比较的系统。
关键词: 鸡过敏位点4(cHS4),绝缘体元件,哺乳动物细胞,附加体载体。
Current Gene Therapy
Title:A Vector Based on the Chicken Hypersensitive Site 4 Insulator Element Replicates Episomally in Mammalian Cells
Volume: 16 Issue: 6
关键词: 鸡过敏位点4(cHS4),绝缘体元件,哺乳动物细胞,附加体载体。
摘要: Background: Gene therapy in mammalian cells requires vectors exhibiting long-term stability and high expression. Episomal gene expression vectors offer a safe and attractive alternative to those that integrate into the host cell genome.
Materials & Methods: In the present study, we developed a new episomal vector based on the insulator, chicken hypersensitive site 4 (cHS4). The cHS4 element was artificially synthesized, cloned into the pEGFP-C1 vector, and used to transfect Chinese hamster ovary (CHO) and human Chang liver cells. The stably transfected cell colonies were further cultured in either the presence or absence of G418 selection. Fluorescence in situ hybridization (FISH) analysis and vector rescue experiments demonstrated that the vector replicated episomally in both CHO and human Chang liver cells. Compared with episomal vectors mediated by matrix attachment region sequences, the cHS4 element-containing vector yielded increased transgene expression levels, transfection efficiency, and stability during long-term culture. The vector was present at a very low copy number in the cells and was stably maintained over more than 100 generations without selection pressure.
Conclusion: In conclusion, apart from a few free vector forms, the cHS4-containing vector mainly replicates episomally in mammalian cells and out- performs comparable systems in terms of yielding both higher expression levels and stability levels.
Export Options
About this article
Cite this article as:
A Vector Based on the Chicken Hypersensitive Site 4 Insulator Element Replicates Episomally in Mammalian Cells, Current Gene Therapy 2016; 16 (6) . https://dx.doi.org/10.2174/1566523217666170202122755
DOI https://dx.doi.org/10.2174/1566523217666170202122755 |
Print ISSN 1566-5232 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5631 |
Call for Papers in Thematic Issues
Programmed Cell Death Genes in Oncology: Pioneering Therapeutic and Diagnostic Frontiers (BMS-CGT-2024-HT-45)
Programmed Cell Death (PCD) is recognized as a pivotal biological mechanism with far-reaching effects in the realm of cancer therapy. This complex process encompasses a variety of cell death modalities, including apoptosis, autophagic cell death, pyroptosis, and ferroptosis, each of which contributes to the intricate landscape of cancer development and ...read more
Related Journals
- Author Guidelines
- Graphical Abstracts
- Fabricating and Stating False Information
- Research Misconduct
- Post Publication Discussions and Corrections
- Publishing Ethics and Rectitude
- Increase Visibility of Your Article
- Archiving Policies
- Peer Review Workflow
- Order Your Article Before Print
- Promote Your Article
- Manuscript Transfer Facility
- Editorial Policies
- Allegations from Whistleblowers
- Announcements
Related Articles
-
Natural Products as Anticancer Agents
Current Drug Targets Absorption, Pharmacokinetics and Disposition of Biodegradable Nanoscale Preparations
Current Drug Metabolism Combined Cancer Therapy: Strategies to Overcome Acquired Aromatase Inhibitor Resistance
Current Pharmaceutical Design Structure-based Design of Mimetics for Granulocyte-macrophage Colony Stimulating Factor (GM-CSF)
Current Pharmaceutical Design Angiopoietin-1 and C16 Peptide Attenuate Vascular and Inflammatory Responses in Experimental Allergic Encephalomyelitis
CNS & Neurological Disorders - Drug Targets Sphingolipid Metabolism Enzymes as Targets for Anti-Cancer Therapy
Current Drug Targets The Role of CD8+ T Cell Soluble Factors in Human Immunodeficiency Virus Infection
Current Medicinal Chemistry The Exploitation of Toll-like Receptor 3 Signaling in Cancer Therapy
Current Pharmaceutical Design Natural Phenolic Compounds as Cardiovascular Therapeutics: Potential Role of their Antiinflammatory Effects
Current Vascular Pharmacology Differentiation Between Osteoporotic and Neoplastic Vertebral Fractures: State of The Art and Future Perspectives
Current Medical Imaging Protein Oxidation and Proteolytic Signalling in Aging
Current Pharmaceutical Design Pharmaconutrition with Omega-3 Fatty Acids: Status Quo and Further Perspectives
Mini-Reviews in Medicinal Chemistry The Association of Neuronal Stress with Activating Transcription Factor 3 in Dorsal Root Ganglion of in vivo and in vitro Models of Bortezomib- Induced Neuropathy
Current Cancer Drug Targets Inhibitors of Nitrogen Oxide Species Production in Animal Models of Inflammation and Future Directions for Therapy in Inflammatory Disorders
Current Medicinal Chemistry - Anti-Inflammatory & Anti-Allergy Agents Is Erectile Dysfunction an Example of Abnormal Endothelial Function?
Current Vascular Pharmacology Oncolytic Viruses: The Best is Yet to Come
Current Cancer Drug Targets Hyaluronan and Hyaluronan Synthases: Potential Therapeutic Targets in Cancer
Current Drug Targets - Cardiovascular & Hematological Disorders Role of the Cannabinoid System in Pain Control and Therapeutic Implications for the Management of Acute and Chronic Pain Episodes
Current Neuropharmacology Pharmacological Interventions on Asymmetric Dimethylarginine, a Clinical Marker of Vascular Disease
Current Medicinal Chemistry Hexokinase II: The Integration of Energy Metabolism and Control of Apoptosis
Current Medicinal Chemistry