Molecular Biology


    Protocols in Current Issue
    An Improved EMSA-based Method to Prioritize Candidate cis-REs for Further Functional Validation
    Authors:  Ting Wu and Gang Li, date: 04/20/2022, view: 567, Q&A: 0

    Cells are the complex product of gene expression programs that involve the coordinated transcription of thousands of genes controlled by cis-regulatory elements (cis-REs). Therefore, identification of cis-REs is the key to decipher the mechanisms underlying the regulation of gene expression. Here, we describe a simple and time-effective protocol

    Lentivirus-mediated Conditional Gene Expression

    The ability to identify the role of a particular gene within a system is dependent on control of the expression of that gene. In this protocol, we describe a method for stable, conditional expression of Nod-Like receptors (NLRs) in THP-1 cells using a lentiviral expression system. This system combines all the necessary components for

    CRISPR-mediated Labeling of Cells in Chick Embryos Based on Selectively Expressed Genes
    Authors:  Masahito Yamagata and Joshua R. Sanes, date: 08/05/2021, view: 4845, Q&A: 0

    The abilities to mark and manipulate specific cell types are essential for an increasing number of functional, structural, molecular, and developmental analyses in model organisms. In a few species, this can be accomplished by germline transgenesis; in other species, other methods are needed to selectively label somatic cells based on the genes

    PCR-mediated One-day Synthesis of Guide RNA for the CRISPR/Cas9 System
    Authors:  Naim Hassan, Farhana Easmin, Keisuke Ekino and Satoshi Harashima, date: 07/05/2021, view: 2531, Q&A: 0

    Nowadays, CRISPR (clustered regularly interspaced short palindromic repeats) and the CRISPR-associated protein (Cas9) system play a major role in genome editing. To target the desired sequence of the genome successfully, guide RNA (gRNA) is indispensable for the CRISPR/Cas9 system. To express gRNA, a plasmid expressing the gRNA sequence is

    TetR Regulated in vivo Repression Technology to Identify Conditional Gene Silencing in Genetically Engineerable Bacteria Using Vibrio cholerae Murine Infections as Model System
    Authors:  Franz G. Zingl, Fabian Mitterer, Himadri B. Thapa and Stefan Schild, date: 10/05/2020, view: 1695, Q&A: 0
    [Abstract] Investigation of bacterial gene regulation upon environmental changes is still a challenging task. For example, Vibrio cholerae, a pathogen of the human gastrointestinal tract, faces diverse transient conditions in different compartments upon oral ingestion. Genetic reporter systems have been demonstrated to be extremely powerful tools to ...
    Preparation of a Bacteriophage T4-based Prokaryotic-eukaryotic Hybrid Viral Vector for Delivery of Large Cargos of Genes and Proteins into Human Cells
    Authors:  Jingen Zhu, Pan Tao, Marthandan Mahalingam and Venigalla B. Rao, date: 04/05/2020, view: 2835, Q&A: 0
    [Abstract] A viral vector that can safely and efficiently deliver large and diverse molecular cargos into cells is the holy grail of curing many human diseases. Adeno-associated virus (AAV) has been extensively used but has a very small capacity. The prokaryotic virus T4 has a large capacity but lacks natural mechanisms to enter mammalian cells. Here, we ...
    Measurement of the Promoter Activity in Escherichia coli by Using a Luciferase Reporter
    Authors:  Yuki Yamanaka, Hiroki Watanabe, Erika Yamauchi, Yukari Miyake and Kaneyoshi Yamamoto, date: 01/20/2020, view: 3200, Q&A: 0
    [Abstract] The reporter system is widely used technique for measuring promoter activity in bacterial cells. Until now, a number of reporter system have been developed, but the bioluminescent reporter constructed from the bacterial luciferase genes is one of the useful systems for measuring in vivo dynamics of gene expression. The introduced ...
    A Novel Dual Lentiviral CRISPR-based Transcriptional Activation System for Gene Expression Regulation in Neurons
    Authors:  Katherine E. Savell, Faraz A. Sultan and Jeremy J. Day, date: 09/05/2019, view: 5014, Q&A: 0
    [Abstract] Robust and efficient gene expression control enables the study of a gene’s function in the central nervous system. Advances in CRISPR-based technology provide new avenues not only for gene editing, but for complex transcriptional control. Here, we describe a protocol to generate high-titer lentiviruses with neuron-optimized CRISPR-activation ...
    Construction of Viral Vectors for Cell Type-specific CRISPR Gene Editing in the Adult Mouse Brain
    Authors:  Hiroshi Yamaguchi and Luis de Lecea, date: 08/20/2019, view: 4377, Q&A: 0
    [Abstract] Recently developed gene editing technologies based on engineered CRISPR/Cas9 systems enables researchers to disrupt genes in a cell type-specific manner in the adult mouse brain. Using these technologies, we recently showed that the dopamine beta-hydroxylase gene in Locus Coeruleus (LC) norepinephrine neurons plays a vital role in the maintenance ...
    pNP Transgenic RNAi System Manual in Drosophila
    Authors:  Fang Wang, Huan-Huan Qiao, Rong-Gang Xu, Jin Sun, Ruibao Zhu, Decai Mao and Jian-Quan Ni , date: 02/05/2019, view: 5429, Q&A: 0
    [Abstract] Much of our knowledge about the mechanisms underlying biological processes relies on genetic approaches, whereby gene activity is reduced and the phenotypic consequences of perturbation are analyzed in detail. For functional genomic studies, a specific, systematic, and cost-effective manner is critical. Transgenic RNAi system is the top priority ...

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