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        Detection and Selection of Lentiviral Vector-Transduced Cells

        互联网

        1327
        Lentiviruses are members of a subgroup of enveloped Retroviridae. Lentivirus-based gene delivery vectors have gained popularity in gene therapy field because of their notable potentials in delivering and integrating transgenes into both mitotic active and inactive cells in vitro and in vivo, a characteristic that overcomes many of the barriers of therapeutic gene therapy application. In the past few years, different lentiviral vector systems have been developed based on primate and nonprimate lentiviruses, including human immunodeficiency virus type 1 (HIV-1), simian immunodeficiency virus (SIV), equine infectious anemia virus (EIAV), and feline immunodeficiency virus (FIV) (see refs. 1 4 ). However, HIV-1-based lentiviral vector remains the best-studied and well-developed lentiviral vector system that has shown high transduction efficiencies targeting many human and experimental animal cell types, including stem cells (embryonic and adult) (5 10 ), terminally differentiated somatic cells (i.e., neurons) (7 ,11 ,12 ), muscles (7 ,13 ,14 ), skin (15 ), liver (13 ,16 ,17 ), islet (18 ,19 ), lung epithelium (20 ,21 ), retina (22 ,23 ), primary T lymphocytes (24 ,25 ), and fetal tissues (21 ,26 ) (Table 1 ).
        Table 1  Relative Efficiencies of Transduction of Various Cell Lines and Primary Cells with VSV-G Pseudotyped Lentiviral Vectorsa
         

        Cell type b

        Relative efficiency (+ to ++++ c )

        Cell lines

           

        (human)

           

        HEK293

        embryonic kidney cells

        ++++

        TE671

        rhabdomyosarcoma cells

        ++++

        HeLa

        cervical adenocarcinoma

        ++++

        HepG2

        hepatoma cells

        ++++

        IB3-1

        CF d bronchial epithelial cells

        +++

        K562

        chronic myelogenous leukemia

        ++++

        U937

        myeloid leukemia cells

        ++++

        A20

        B cell lymphoma

        +

        EBV blasts

        EBV transformed B lymphoma

        +++

        (mouse)

           

        Renca

        renal cell carcinoma

        ++++

        CT26

        colon carcinoma

        ++++

        NIH3T3

        fibroblasts

        +++

        BaF3

        pre-B lymphoma

        +++

        TF1

        proerythroblastic leukemia cells

        ++++

        DC2.4

        immortalized immature DC

        ++/+++

        P19

        embryonic carcinoma

        +++

        Primary cells

           

        (human)

           

        HUVEC

        umbilical vein endothelial cells

        +++

        CD34+ cells

        hematopoietic stem/progenitor cells

        ++/+++ e

        monocytes

        myeloid cells

        ++

        DC

        immature dendritic cells

        +++

        T cells

        lymphocytes

        +++ f

        B cells (other species)

        lymphocytes

        +

        ESC

        mouse embryonic stem cells

        +++

        neuron

        rat neuronal cells

        +++

        liver stem cells

        rat oval cells

        +++

        liver

        primary rat hepatocytes

        ++

        RPE

        rat retinal pigment epithelial cells

        ++++

        rod

        chicken eye rod cells

        ++

        bone marrow

        mouse BM mixed population

        +++

        HSC

        mouse hematopoietic stem/progenitor cells

        ++

        a The results of primary cell transduction are only for reference comparison; they are based on in vivo or ex vivo culture transduced using HIV-1 vectors carrying different reporter genes. Therefore, the efficiency can vary markedly depending on the type of reporter gene and the infection condition. b If not specifi ed, the cell types are referring to human cells. c Relative efficiency is defi ned as: ++++ = >50% cells transduced at MOI of 1 to 5; +++ = >50% cells transduced at MOI of 5 to 10; ++ = >30% cells transduced at MOI of 10–20; and + = 1–20% cells transduced at MOI>20. d Cystic fibrosis. e Transduction effi ciency of cytokine-stimulated CD34+ stem cells (+++) is higher than that of unstimulated cells (++). f Both naive and activated human T lymphocytes can be transduced relatively easily with lentiviral vectors; the transgene expression level in na�ve T cells, however, is very low and barely above background level.
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