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           Search results for: Mouse Anti Human Granulocyte Colony Stimulating Factor GCSF   

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Am80-GCSF synergizes myeloid expansion and differentiation to generate functional neutrophils that reduce neutropenia-associated infection and mortality.

Neutrophils generated by granulocyte colony-stimulating factor (GCSF) are functionally immature and, consequently, cannot effectively reduce infection and infection-related mortality in cancer chemotherapy-induced neutropenia (CCIN). Am80, a retinoic acid (RA) agonist that enhances granulocytic differentiation by selectively activating transcription factor RA receptor alpha (RARα), alternatively promotes RA-target gene expression. We found that in normal and malignant primary human hematopoietic specimens, Am80-GCSF combination coordinated proliferation with differentiation to develop complement receptor-3 (CR3)-dependent neutrophil innate immunity, through altering transcription of RA-target genes RARβC/EBPε, CD66, CD11b, and CD18 This led to generation of functional neutrophils capable of fighting infection, whereas neutralizing neutrophil innate immunity with anti-CD18 antibody abolished neutrophil bactericidal activities induced by Am80-GCSF Further, Am80-GCSF synergy was evaluated using six different dose-schedule-infection mouse CCIN models. The data demonstrated that during "emergency" granulopoiesis in CCIN mice undergoing transient systemic intravenous bacterial infection, Am80 effect on differentiating granulocytic precursors synergized with GCSF-dependent myeloid expansion, resulting in large amounts of functional neutrophils that reduced infection. Importantly, extensive survival tests covering a full cycle of mouse CCIN with perpetual systemic intravenous bacterial infection proved that without causing myeloid overexpansion, Am80-GCSF generated sufficient numbers of functional neutrophils that significantly reduced infection-related mortality in CCIN mice. These findings reveal a differential mechanism for generating functional neutrophils to reduce CCIN-associated infection and mortality, providing a rationale for future therapeutic approaches.

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Cannabidiol (CBD) enhances lipopolysaccharide (LPS)-induced pulmonary inflammation in C57BL/6 mice.

Cannabidiol (CBD) is a plant-derived cannabinoid that has been predominantly characterized as anti-inflammatory. However, it is clear that immune effects of cannabinoids can vary with cannabinoid concentration, or type or magnitude of immune stimulus. The present studies demonstrate that oral administration of CBD enhanced lipopolysaccharide (LPS)-induced pulmonary inflammation in C57BL/6 mice. The enhanced inflammatory cell infiltrate as observed in bronchoalveolar lavage fluid (BALF) was comprised mainly of neutrophils, with some monocytes. Concomitantly, CBD enhanced pro-inflammatory cytokine mRNA production, including tumor necrosis factor-α (Tnfa), interleukins (IL)-5 and -23 (Il6, Il23), and granulocyte colony stimulating factor (Gcsf). These results demonstrate that the CBD-mediated enhancement of LPS-induced pulmonary inflammation is mediated at the level of transcription of a variety of pro-inflammatory genes. The significance of these studies is that CBD is part of a therapeutic currently in use for spasticity and pain in multiple sclerosis patients, and therefore it is important to further understand mechanisms by which CBD alters immune function.

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Granulocyte colony stimulating factor exacerbates antineutrophil cytoplasmic antibody vasculitis.

Granulocyte colony stimulating factor (GCSF) is important in mobilising neutrophils from the bone marrow but also has a range of proinflammatory effects. We therefore decided to investigate the role of GCSF in antineutrophil cytoplasmic antibody (ANCA) vasculitis.

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Human Granulocyte Macroph Human Granulocyte Colony Mouse Granulocyte Colony Rat Granulocyte Macrophag G CSF | granulocyte colon CELLKINES MACROPHAGE COLO MACROPHAGE COLONY STIMULA CELLKINES MACROPHAGE COLO MACROPHAGE COLONY STIMULA Human Macrophage Colony S Macrophage Colony Stimula Macrophage Colony Stimula

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Protection of spermatogenesis against gamma ray-induced damage by granulocyte colony-stimulating factor in mice.

The radioprotective effects of granulocyte colony-stimulating factor (GCSF) were further investigated with respect to the testicular system. Recombinant human GCSF (100 μg kg(-1) body weight/day) was administrated to male C3H/HeN mice by subcutaneous injection for three consecutive days before pelvic irradiation (5 Gy) and histopathological parameters were assessed at 12 h and 21 days post-irradiation (pi). The GCSF protected the germ cells from radiation induced- apoptosis (P < 0.01 vs. irradiated group at 12 h pi). GCSF remarkably attenuated radiation-induced reduction in testis weight, seminiferous tubular diameter, seminiferous epithelial depth and sperm head count in the testes (P < 0.05 versus irradiated group at 21 days pi). Repopulation index and stem cell survival index of the seminiferous tubules were increased in the GCSF-treated group when compared with the radiation group (P < 0.01). The frequency of abnormal sperm in the GCSF group was lower than that in the irradiated group at 21 days pi (P < 0.01). The decrease in the sperm count and in sperm liability in the epididymis caused by irradiation was counteracted by GCSF. The present study suggests that GCSF protects from radiation-induced testicular dysfunction via an anti-apoptotic effect and recovery of spermatogenesis.

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Human Granulocyte Macroph Human Granulocyte Colony Macrophage Colony Stimula Macrophage Colony Stimula Mouse Granulocyte Colony Rat Granulocyte Macrophag G CSF | granulocyte colon CELLKINES MACROPHAGE COLO MACROPHAGE COLONY STIMULA CELLKINES MACROPHAGE COLO MACROPHAGE COLONY STIMULA Human Macrophage Colony S

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Lung squamous cell carcinoma producing both parathyroid hormone-related peptide and granulocyte colony stimulating factor.

An autopsy case of a 61 year old male with primary squamous cell carcinoma of the lung with associated marked leukocytosis and hypercalcemia is reported. High levels of serum parathyroid hormone-related peptide (PTHrP) and granulocyte colony stimulating factor (GCSF) were detected. The tumor cells distinctly showed positive cytoplasmic immunoreactions with anti-PTHrP and anti-GCSF antibodies. Marked granulocytosis and thin bony trabeculae lacking osteoblasts were observed in the vertebral bone. Calcium deposits were found in the proximal tubules of the kidneys. Infarcts were seen as a result of fibrin thrombosis of the splenic artery. The tumor was successfully transplanted into nude mice in which the high levels of serum PTHrP and GCSF were reproduced. These results indicate that the tumor simultaneously produced both PTHrP and GCSF causing the paraneoplastic syndromes of hypercalcemia and leukocytosis.

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CELLKINES MACROPHAGE COLO CELLKINES MACROPHAGE COLO Human Granulocyte Macroph Human Granulocyte Colony Macrophage Colony Stimula Macrophage Colony Stimula Mouse Granulocyte Colony Rat Granulocyte Macrophag Lung squamous cell carcin Lung squamous cell carcin Lung squamous cell carcin Lung squamous cell carcin

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Overview of radioimmunotherapy in advanced breast cancer using I-131 chimeric L6.

131I chimeric L6 (ChL6) monoclonal antibody (MoAb) therapy has been performed in 12 patients with advanced, metastatic breast cancer. The protocol was designed to determine the maximum tolerated dose (MTD) of radioimmunotherapy that could be administered at 4 intervals. Ten patients received 20-70 mCi/m2 of 131I ChL6. Two of the patients received granulocyte colony stimulating factor (GCSF) on days 10-20 post therapy. The MTD for two doses was 60 mCi/m2 and thrombocytopenia was the dose limiting toxicity in the absence of marrow reconstitution with stem cells. Two patients received 150 mCi/m2 with autologous peripheral blood stem cell support 7 and 9 days post treatment. The MTD has not been reached for 131I-ChL6 with autologous stem cell support. In the 12 patients treated with 131I ChL6, six patients (50%) had measurable tumor regressions greater than 30% of the sum of the largest two dimensional products for measurable tumors. Four of these 6 patients had a partial response (PR), i.e., > or = 50% reduction in tumor size. These therapeutic responses associated with modest clinical toxicity in heavily pretreated patients suggest that clinically relevant radioimmunotherapeutic approaches can be devised for metastatic breast cancer.

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Production of polyclonal and monoclonal antibodies to human granulocyte colony-stimulating factor (GCSF) and development of immunoassays.

Murine monoclonal antibodies and a sheep polyclonal antiserum against recombinant human granulocyte colony-stimulating factor (GCSF) have been produced. These have been used to develop an immunoassay which can detect 250 pg/ml (25 U) of both natural and recombinant human GCSF. The assay involves forming a complex between GCSF and a monoclonal anti-GCSF, binding of the complex to microtitre wells coated with sheep anti-GCSF and detection of the bound complex with 125I-labelled sheep anti-mouse IgG. Unlike the classical bone marrow assay and other cell line based bioassays for GCSF, the immunoassay was specific for the cytokine, showing no cross-reactivity with GM-CSF, IL-6, IL-3 or IL-1 alpha and -beta. The assay does not exhibit interfering matrix effects when used for the estimation of human GCSF in serum.

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Human Granulocyte Macroph Human Granulocyte Colony Human Macrophage Colony S Macrophage Colony Stimula Macrophage Colony Stimula Macrophage Colony Stimula Macrophage Colony Stimula Macrophage Colony Stimula Macrophage Colony Stimula RABBIT ANTI HUMAN SDF-1 A Mouse Granulocyte Colony Rat Granulocyte Macrophag

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