Search results for: pBABEpuro_PABP Retroviral Vector
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[Relationship between DNMT1 and Methylation of SHP-1 Promoter 2 in K562 Cells].To investigate the relationship of DNA methyltransferase 1 ( DNMT1 ) with hematopoietic cell phosphatase (SHP-1) gene expression and promoter 2 methylation status in cell line K562.
2425 related Products with: [Relationship between DNMT1 and Methylation of SHP-1 Promoter 2 in K562 Cells].Insulin promoter factor 1 anti HCMV IE pp65 IgG1 (m anti HCMV gB IgG1 (monocl DNA (cytosine 5) methyltr Human Interleukin-16 IL-1 Human Interleukin-17E (IL Human Interleukin-1-alpha Human Interleukin-10 IL-1 Human Interleukin-11 IL-1 Human Interleukin-13 IL-1 Human Interleukin-15 IL-1 Human Interleukin-19 IL-1
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The Hard Way towards an Antibody-Based HIV-1 Env Vaccine: Lessons from Other Viruses.Although effective antibody-based vaccines have been developed against multiple viruses, such approaches have so far failed for the human immunodeficiency virus type 1 (HIV-1). Despite the success of anti-retroviral therapy (ART) that has turned HIV-1 infection into a chronic disease and has reduced the number of new infections worldwide, a vaccine against HIV-1 is still urgently needed. We discuss here the major reasons for the failure of "classical" vaccine approaches, which are mostly due to the biological properties of the virus itself. HIV-1 has developed multiple mechanisms of immune escape, which also account for vaccine failure. So far, no vaccine candidate has been able to induce broadly neutralizing antibodies (bnAbs) against primary patient viruses from different clades. However, such antibodies were identified in a subset of patients during chronic infection and were shown to protect from infection in animal models and to reduce viremia in first clinical trials. Their detailed characterization has guided structure-based reverse vaccinology approaches to design better HIV-1 envelope (Env) immunogens. Furthermore, conserved Env epitopes have been identified, which are promising candidates in view of clinical applications. Together with new vector-based technologies, considerable progress has been achieved in recent years towards the development of an effective antibody-based HIV-1 vaccine.
1627 related Products with: The Hard Way towards an Antibody-Based HIV-1 Env Vaccine: Lessons from Other Viruses.HIV 1 env gp41 recombinan HIV 2 env gp36 recombinan HIV type O envelope antig HIV 2 env gp36 recombinan TCP-1 theta antibody Sour Rabbit Anti-HIV p55+P6-Ga Rabbit Anti-HIV p55+NP7 P Rabbit Anti-HIV p55+NP7 P Rabbit Anti-HIV p55+NP7 P Rabbit Anti-HIV p55+NP7 P Rabbit Anti-HIV p55+NP7 P Rabbit Anti-HIV p55+NP7 P
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Replication-incompetent gammaretroviral and lentiviral vector-based insertional mutagenesis screens identify prostate cancer progression genes.Replication-incompetent gammaretroviral (γRV) and lentiviral (LV) vectors have both been used in insertional mutagenesis screens to identify cancer drivers. In this approach the vectors stably integrate in the host cell genome and induce cancers by dysregulating nearby genes. The cells that contain a retroviral vector provirus in or near a proto-oncogene or tumor suppressor are preferentially enriched in a tumor. γRV and LV vectors have different integration profiles and genotoxic potential, making them potentially complementary tools for insertional mutagenesis screens. We performed screens using both γRV and LV vectors to identify driver genes that mediate progression of androgen-independent prostate cancer (AIPC) using a xenotransplant mouse model. Vector transduced LNCaP cells were injected orthotopically into the prostate gland of immunodeficient mice. Mice that developed tumors were castrated to create an androgen-deficient environment and metastatic tumors that developed were analyzed. A high-throughput modified genomic sequencing PCR (MGS-PCR) approach identified the positions of vector integrations in these metastatic tumors. , , , , , , , , , , , and were identified as candidate prostate cancer (PC) progression genes. and expression in PC patients predicted the risk of recurrence after androgen deprivation therapy. Our data shows that γRV and LV vectors are complementary approaches to identify cancer driver genes which may be promising potential biomarkers and therapeutic targets.
2977 related Products with: Replication-incompetent gammaretroviral and lentiviral vector-based insertional mutagenesis screens identify prostate cancer progression genes.Prostate disease spectrum Adrenal gland disease spe Rectum disease spectrum ( Kidney disease spectrum ( Prostate cancer and hyper Prostate cancer, adjacent Bladder disease spectrum Bladder disease spectrum Bone and cartilage diseas Breast disease spectrum ( Lentiviral Technology pCD Brain disease spectrum (b
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Nuclease-free Adeno-Associated Virus-Mediated Il2rg Gene Editing in X-SCID Mice.X-linked severe combined immunodeficiency (X-SCID) has been successfully treated by hematopoietic stem cell (HSC) transduction with retroviral vectors expressing the interleukin-2 receptor subunit gamma gene (IL2RG), but several patients developed malignancies due to vector integration near cellular oncogenes. This adverse side effect could in principle be avoided by accurate IL2RG gene editing with a vector that does not contain a functional promoter or IL2RG gene. Here, we show that adeno-associated virus (AAV) gene editing vectors can insert a partial Il2rg cDNA at the endogenous Il2rg locus in X-SCID murine bone marrow cells and that these ex vivo-edited cells repopulate transplant recipients and produce CD4 and CD8 T cells. Circulating, edited lymphocytes increased over time and appeared in secondary transplant recipients, demonstrating successful editing in long-term repopulating cells. Random vector integration events were nearly undetectable, and malignant transformation of the transplanted cells was not observed. Similar editing frequencies were observed in human hematopoietic cells. Our results demonstrate that therapeutically relevant HSC gene editing can be achieved by AAV vectors in the absence of site-specific nucleases and suggest that this may be a safe and effective therapy for hematopoietic diseases where in vivo selection can increase edited cell numbers.
1606 related Products with: Nuclease-free Adeno-Associated Virus-Mediated Il2rg Gene Editing in X-SCID Mice.Human Epstein-Barr Virus Mouse Epstein-Barr Virus Adeno Associated Virus (A Adeno Associated Virus (A Monoclonal antibody Anti DNA (cytosine 5) methyltr Rat TGF-beta-inducible ea Rat TGF-beta-inducible ea Recombinant Influenza B V Recombinant Influenza B V Recombinant Influenza B V Native Influenza A Virus
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Rapid Construction of Antitumor T-cell Receptor Vectors from Frozen Tumors for Engineered T-cell Therapy.T cells genetically engineered with tumor antigen-specific T-cell receptor (TCR) genes have demonstrated therapeutic potential in patients with solid tumors. In order to achieve broader application, an efficient method to identify TCR genes for an array of tumor antigens and HLA restriction elements is required. Here, we have developed a method to construct a TCR-expression library from specimens, including frozen tumor biopsies, that contain antigen-specific T cells. TCR-expressing cassettes were constructed and cloned in a retroviral plasmid vector within 24 hours by unbiased PCR amplification of TCR α and β chain variable regions assembled with TCR constant regions. The method was validated by constructing TCR-expressing vectors from tumor antigen-specific T-cell clones and functionally assessing TCR gene-transduced T cells. We applied this method to frozen ovarian tumor specimens that were infiltrated by tumor antigen-specific T cells. The tumor-derived TCR libraries were expressed in peripheral T cells from healthy volunteers and screened for tumor antigen-specific TCR pairs with the use of an MHC/peptide tetramer reagent. Tumor antigen-specific TCR-expressing transgenes were recovered from isolated tetramer-positive T cells. Peripheral T cells that were engineered with library-derived TCR gene showed potent therapeutic antitumor effect in a tumor xenograft model. Our method can efficiently and rapidly provide tumor-specific TCR-expressing viral vectors for the manufacture of therapeutic and personalized antitumor T-cell products.
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Regulated Mesenchymal Stem Cells Mediated Colon Cancer Therapy Assessed by Reporter Gene Based Optical Imaging.Colorectal cancer is the most common cancer in both men and women and the second most common cause of cancer-related deaths. Suicide gene-based therapy with suicide gene-transduced mesenchymal stem cells (MSCs) is a promising therapeutic strategy. A tetracycline-controlled Tet-On inducible system used to regulate gene expression may be a useful tool for gene-based therapies. The aim of this study was to develop therapeutic MSCs with a suicide gene that is induced by an artificial stimulus, to validate therapeutic gene expression, and to monitor the MSC therapy for colon cancer using optical molecular imaging. For our study, we designed the Tet-On system using a retroviral vector and developed a response plasmid RetroX-TRE (tetracycline response element) expressing a mutant form of herpes simplex virus thymidine kinase (HSV1-sr39TK) with dual reporters (eGFP-Fluc2). Bone marrow-derived MSCs were transduced using a RetroX-Tet3G (Clontech, CA, USA) regulatory plasmid and RetroX-TRE-HSV1-sr39TK-eGFP-IRES-Fluc2, for a system with a Tet-On (MSC-Tet-TK/Fluc2 or MSC-Tet-TK) or without a Tet-On (MSC-TK/Fluc2 or MSC-TK) function. Suicide gene engineered MSCs were co-cultured with colon cancer cells (CT26/Rluc) in the presence of the prodrug ganciclovir (GCV) after stimulation with or without doxycycline (DOX). Treatment efficiency was monitored by assessing Rluc (CT26/Rluc) and Fluc (MSC-Tet-TK and MSC-TK) activity using optical imaging. The bystander effect of therapeutic MSCs was confirmed in CT26/Rluc cells after GCV treatment. Rluc activity in CT26/Rluc cells decreased significantly with GCV treatment of DOX(+) cells ( < 0.05 and 0.01) whereas no significant changes were observed in DOX(-) cells. In addition, Fluc activity in also decreased significantly with DOX(+) MSC-Tet-TK cells, but no signal was observed in DOX(-) cells. In addition, an MSC-TK bystander effect was also confirmed. We assessed therapy with this system in a colon cancer xenograft model (CT26/Rluc). We successfully transduced cells and developed a Tet-On system with the suicide gene HSV1-sr39TK. Our results confirmed the therapeutic efficiency of a suicide gene with the Tet-On system for colon cancer. In addition, our results provide an innovative therapeutic approach using the Tet-On system to eradicate tumors by administration of MSC-Tet-TK cells with DOX and GCV.
2283 related Products with: Regulated Mesenchymal Stem Cells Mediated Colon Cancer Therapy Assessed by Reporter Gene Based Optical Imaging.Macrophage Colony Stimula Macrophage Colony Stimula Rat Mesenchymal Stem Cell Amplite™ Luciferase Rep Amplite™ Luciferase Rep Amplite™ Luciferase Rep Amplite™ Gaussia Lucife Amplite™ Gaussia Lucife Amplite™ Renilla Lucife Amplite™ Renilla Lucife Amplite™ Renilla Lucife serologically defined col
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A novel lentiviral scFv display library for rapid optimization and selection of high affinity antibodies.Antibody display libraries have become a popular technique to screen monoclonal antibodies for therapeutic purposes. An important aspect of display technology is to generate an optimization library by changing antibody affinity to antigen through mutagenesis and screening the high affinity antibody. In this study, we report a novel lentivirus display based optimization library antibody in which Agtuzumab scFv is displayed on cell membrane of HEK-293T cells. To generate an optimization library, hotspot mutagenesis was performed to achieve diverse antibody library. Based on sequence analysis of randomly selected clones, library size was estimated approximately to be 1.6 × 10. Lentivirus display vector was used to display scFv antibody on cell surface and flow cytometery was performed to check the antibody affinity to antigen. Membrane bound scFv antibodies were then converted to secreted antibody through cre/loxP recombination. One of the mutant clones, M8 showed higher affinity to antigen in flow cytometery analysis. Further characterization of cellular and secreted scFv through western blot showed that antibody affinity was increased by three fold after mutagenesis. This study shows successful construction of a novel antibody library and suggests that hotspot mutagenesis could prove a useful and rapid optimization tool to generate similar libraries with various degree of antigen affinity.
1873 related Products with: A novel lentiviral scFv display library for rapid optimization and selection of high affinity antibodies.Apoptosis antibody array Cell cycle antibody array Cytokine antibody array i Master antibody array is Signal transduction antib AKT Phospho-Specific Arra AKT PKB Signaling Phospho AMPK Signaling Phospho-Sp Apoptosis Phospho-Specifi Cancer Apoptosis Phospho- Cell Cycle Control Phosph Cell Cycle Phospho-Specif
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Clinical evaluation of outdoor cats exposed to ectoparasites and associated risk for vector-borne infections in southern Italy.Cats can be carriers of infected arthropods and be infected with several vector-borne pathogens (VBP) but there is limited knowledge about their pathogenic role in cats.
2797 related Products with: Clinical evaluation of outdoor cats exposed to ectoparasites and associated risk for vector-borne infections in southern Italy.Oral squamous cell cancer Head & Neck cancer test t Recombinant Human Interfe Native Influenza HA (A To Native Influenza HA (A To Native Influenza HA (A To Cell Meter™ Fluorimetri Cell Meter™ Fluorimetri T-2 Toxin Mycotoxins ELIS Nycodenz, non ionic, non (7’-Benzyloxy-indolymet Homogenizer for 24 sample
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ENPP2 protects cardiomyocytes from erastin-induced ferroptosis.Ferroptosis is an iron- and oxidative-dependent form of regulated cell death and may play important roles in maintaining myocardium homeostasis and pathology of cardiovascular diseases. Currently, the regulatory roles of lipid signals in regulating cardiomyocytes ferroptosis has not been explored. In this study, we show that ENPP2, as a lipid kinase involved in lipid metabolism, protects against erastin-induced ferroptosis in cardiomyocytes. The classical ferroptosis inducer erastin remarkably inhibits the growth which could be rescued by the small molecule Fer-1 in H9c2 cells. Adenovirus mediated ENPP2 overexpression modestly promotes migration and proliferation and significantly inhibits erastin-induced ferroptosis of H9c2 cells. ENPP2 overexpression leads to increase the LPA level in supernatant of H9c2 cells. H9c2 cells express the LPAR1, LPAR3, LPAR4 and LPAR5 receptors. The supernatant of ENPP2 transduced cardiomyocytes could protects the cells from erastin-induced ferroptosis of H9c2 cells. Furthermore, we observed that ENPP2 overexpression regulates ferroptosis-associated gene GPX4, ACSL4 and NRF2 expression and modulates MAPK and AKT signal in H9c2 cells. Collectively, these findings demonstrated that ENPP2/LPA protects cardiomyocytes from erastin-induced ferroptosis through modulating GPX4, ACSL4 and NRF2 expression and enhancing AKT survival signal.
Anti AGO2 Human, Monoclon Anti AGO2 Mouse, Monoclon Anti AGO2 Human, Monoclon Anti AGO2 Mouse, Monoclon Human Epstein-Barr Virus Jurkat Cell Extract (Indu Jurkat Cell Extract (Indu Jurkat Cell Extract (Indu Jurkat Cell Extract (Indu Mouse Epstein-Barr Virus TGF beta induced factor 2 Bovine prolactin-induced
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Engineered U7 snRNA mediates sustained splicing correction in erythroid cells from β-thalassemia/HbE patients.Repair of a splicing defect of β-globin pre-mRNA harboring hemoglobin E (HbE) mutation was successfully accomplished in erythroid cells from patients with β-thalassemia/HbE disorder by a synthetic splice-switching oligonucleotide (SSO). However, its application is limited by short-term effectiveness and requirement of lifelong periodic administration of SSO, especially for chronic diseases like thalassemias. Here, we engineered lentiviral vectors that stably express U7 small nuclear RNA (U7 snRNA) carrying the splice-switching sequence of the SSO that restores correct splicing of β-globin pre-mRNA and achieves a long-term therapeutic effect. Using a two-step tiling approach, we systematically screened U7 snRNAs carrying splice-switching SSO sequences targeted to the cryptic 5' splice site created by HbE mutation. We tested this approach and identified the most responsive element for mediating splicing correction in engineered U7 snRNAs in HeLa-β cell model cell line. Remarkably, the U7 snRNA lentiviral vector (U7 βE4+1) targeted to this region effectively restored the correctly-spliced β-globin mRNA for at least 5 months. Moreover, the effects of the U7 βE4+1 snRNA lentiviral vector were also evident as upregulation of the correctly-spliced β-globin mRNA in erythroid progenitor cells from β-thalassemia/HbE patients treated with the vector, which led to improvements of pathologies in erythroid progenitor cells from thalassemia patients. These results suggest that the splicing correction of β-globin pre-mRNA by the engineered U7 snRNA lentiviral vector provides a promising, long-term treatment for β-thalassemia/HbE.
2758 related Products with: Engineered U7 snRNA mediates sustained splicing correction in erythroid cells from β-thalassemia/HbE patients.anti HSV (II) gB IgG1 (mo anti HCMV IE pp65 IgG1 (m anti HCMV gB IgG1 (monocl Macrophage Colony Stimula Macrophage Colony Stimula HBeAg test strip, Infecti Anti-HBeAg (HBeAb) test s HBV-3 panel test, HBsAg H GLP 1 ELISA Kit, Rat Gluc GLP 2 ELISA Kit, Rat Prog Glucagon ELISA KIT, Rat G Leptin ELISA Kit, Rat Lep
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