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  • Human interferon-alpha increases the cytotoxic effect of CD56(+)cord blood-derived cytokine-induced killer cells on human B-acute lymphoblastic leukemia cell lines. 22974386

    Background aims. Cytokine-induced killer (CIK) cells may represent a promising immunotherapy for the treatment of children with relapsing B-lineage acute lymphoblastic leukemia (B-ALL) following hematopoietic stem cell transplantation (HSCT). Therefore, we investigated the possibility of combining adoptive immunotherapy with CIK cells and human interferon-alpha (hIFN-α) in order to potentiate the cytotoxicity of CIK cells against B-ALL. Methods. Cord blood- derived CIK (CB-CIK) cells were differentiated, stimulated with phosphate-buffered saline (PBS) or hIFN-α, and tested for cytotoxic activity. We tested the anti-leukemic and graft-versus-host disease (GvHD) effects of CB-CIK cells in a human xenograft NOD/SCID/γc(-) (NSG) mouse model. Results. Bulk CB-CIK cells showed very moderate cytotoxic activity while the subpopulation of CD56(+) CB-CIK cells showed significant cytotoxic activity against B-ALL cells. hIFN-α significantly augmented the cytotoxicity of CD56(+)CB-CIK cells in vitro and induced signal transducer and activator of transcription-1 (STAT1) phosphorylation. In addition, CD56(+)CB-CIK cells could delay mouse mortality significantly in vivo, and this effect was enhanced significantly by hIFN-α (P = 0.022). Furthermore, unlike CB mononuclear cells or peripheral blood mononuclear cells (PBMC), CD56(+)CB-CIK cells, alone or stimulated with hIFN-α, caused either no GvHD or mild GvHD, respectively, when injected into sublethally irradiated NSG mice. Conclusions. CD56(+)CB-CIK cells are effective cytotoxic agents against human B-ALL cell lines in vitro and possess anti-leukemic activity that is potentiated by hIFN-α in an NSG mouse model in vivo. These pre-clinical data support the testing of this immunotherapeutic approach in the clinic for the treatment of B-ALL.
    Document Type:
    Reference
    Product Catalog Number:
    MAB1501
    Product Catalog Name:
    Anti-Actin Antibody, clone C4

  • Research on promoting periodontal regeneration with human basic fibroblast growth factor-modified bone marrow mesenchymal stromal cell gene therapy. 19308772

    BACKGROUND AIMS: Recently, it has been found that effective periodontal regeneration can be induced by bone marrow mesenchymal stromal cell (BMSC) transplantation or local application of basic fibroblast growth factor (bFGF). The aim of the present study was to assess, in dogs, the efficacy of periodontal regeneration via the delivery of BMSC transfected with bFGF to repair destruction of periodontal tissue. METHODS: BMSC from dogs were isolated, cultured and purified via density-gradient centrifugation. Polymerase chain reaction (PCR) was employed to clone bFGF cDNA from human periodontal cells, and the product was then ligated into the eukaryotic expression vector pDC316-IREs-EGFP. BMSC transfected with pDC316bFGF-IREs-EGFP were transplanted into root furcation defects of beagle dogs. After 6 weeks, regeneration in defects was assessed via clinical examination, X-ray, histologic observation and micro-CT analysis. RESULTS: DNA sequence analysis showed that the bFGF sequence of recombinant plasmid pDC316bFGF-IREs-EGFP was consistent with that reported by GeneBank. bFGF expression was detected with Western blotting, and active bFGF in supernatant was also observed. Our animal experiment proved that the regenerating speed of periodontal bone tissue in groups transplanted with BMSC containing the modified bFGF gene was higher than in those transplanted with BMSC alone. CONCLUSIONS: A successfully constructed eukaryotic expression vector containing human bFGF in pDC316bFGF-IREs-EGFP could produce bioactive bFGF in vitro. bFGF overexpression mediated by the recombinant plasmid pDC316bFGF- IREs-EGFP accelerated periodontal regeneration.
    Document Type:
    Reference
    Product Catalog Number:
    12-349
    Product Catalog Name:
    Goat Anti-Mouse IgG Antibody, HRP conjugate

  • Good manufacturing practice-grade production of unrestricted somatic stem cell from fresh cord blood. 20370349

    The discovery of unrestricted somatic stem cells (USSC), a non-hematopoietic stem cell population, brought cord blood (CB) to the attention of regenerative medicine for defining more protocols for non-hematopoietic indications. We demonstrate that a reliable and reproducible method for good manufacturing practice (GMP)-conforming generation of USSC is possible that fulfils safety requirements as well as criteria for clinical applications, such as adherence of strict regulations on cell isolation and expansion.
    Document Type:
    Reference
    Product Catalog Number:
    MAB1281
    Product Catalog Name:
    Anti-Nuclei Antibody, clone 235-1

  • Unrestricted somatic stem cells: interaction with CD34+ cells in vitro and in vivo, expression of homing genes and exclusion of tumorigenic potential. 20950214

    Transplantation of allogeneic hematopoietic stem cells (HSC) within the framework of hematologic oncology or inherited diseases may be associated with complications such as engraftment failure and long-term pancytopenia. HSC engraftment can be improved, for example by co-transplantation with mesenchymal stem cells (MSC). Recently, a new multipotent MSC line from umbilical cord blood, unrestricted somatic stem cells (USSC), has been described. It was demonstrated that USSC significantly support proliferation of HSC in an in vitro feeder layer assay.
    Document Type:
    Reference
    Product Catalog Number:
    MAB1281
    Product Catalog Name:
    Anti-Nuclei Antibody, clone 235-1

  • Anti-TAFII250, clone 6B3

    Document Type:
    Certificate of Analysis
    Lot Number:
    2832935
    Product Catalog Number:
    04-1525
    Product Catalog Name:
    Anti-TAFII250 Antibody, clone 6B3

  • Liver triglyceride secretion and lipid oxidative metabolism are rapidly altered by leptin in vivo. 16339207

    Leptin has potent lipid-lowering effects in peripheral tissues and plasma that are proposed to be important for the prevention of cellular lipotoxicity and insulin resistance. The current study addressed in vivo the effects of acute leptin delivery on liver triglyceride (TG) metabolism, the consequence of hepatic leptin action on whole-body TG homeostasis, and the mechanisms of leptin action. A 120-min iv leptin infusion (plasma leptin, approximately 14 ng/ml) decreased liver TG levels (53 +/- 3%; P = 0.001), but not skeletal muscle TG levels, and increased liver phosphatidylinositol 3-kinase activity (341 +/- 95%; P = 0.01) in lean rats. Leptin had no effect on liver TG levels or phosphatidylinositol 3-kinase activity in diet-induced obese rats. In lean animals, leptin decreased the plasma TG concentration (20 +/- 7%; P = 0.017), the rate of TG accumulation in plasma after tyloxapol administration (26 +/- 6%; P = 0.003), and TG secretion from isolated liver (51 +/- 8%; P = 0.004). To determine possible metabolic fates of depleted hepatic TG, we assessed leptin effects on liver oxidative metabolism. Leptin increased hepatic acetyl-coenzyme A carboxylase phosphorylation (85 +/- 13%; P = 0.006), fatty acid oxidation (49 +/- 7%; P = 0.001) and ketogenesis (69 +/- 15%; P = 0.004). Finally, intracerebroventricular delivery of leptin for 120 min had no effect on liver TG levels, but did increase signal transducer and activator of transcription 3 phosphorylation (162 +/- 40%; P = 0.02). These data present in vivo evidence for a role for leptin in the acute regulation of hepatic TG metabolism, and whole body TG homeostasis. A likely contributing mechanism for these effects is leptin-induced partitioning of TG into oxidative pathways.
    Document Type:
    Reference
    Product Catalog Number:
    07-303
    Product Catalog Name:
    Anti-phospho-Acetyl CoA Carboxylase (Ser79) Antibody

  • pNPP Tyr Assay Buffer

    Document Type:
    Certificate of Analysis
    Lot Number:
    2821747
    Product Catalog Number:
    20-180
    Product Catalog Name:
    pNPP Tyr Assay Buffer