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           Search results for: Rat monoclonal anti mouse Cathepsin-3 Anti-Mouse antibodies   

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#23939174   2013/08/13 Save this To Up

[Neutralization of interleukin-17 aggravates respiratory infection induced by Chlamydia trachomatis in mice].

To evaluate the role of interleukin-17 (IL-17) in respiratory infection with Chlamydia trachomatis in mice.

1316 related Products with: [Neutralization of interleukin-17 aggravates respiratory infection induced by Chlamydia trachomatis in mice].

Human Interleukin-17E (IL Human Interleukin-17F IL- Human Interleukin-17AF He Human Interleukin-17A IL- Mouse Interleukin-17A IL- Mouse Interleukin-17E (IL Mouse Interleukin-17AF He Mouse Interleukin-17F IL- interleukin 17 receptor C Recombinant Human Interle Recombinant Human Interle Recombinant Human Interle

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#21702044   2012/02/23 Save this To Up

Humoral response to catumaxomab correlates with clinical outcome: results of the pivotal phase II/III study in patients with malignant ascites.

The trifunctional antibody catumaxomab is a targeted immunotherapy for the intraperitoneal treatment of malignant ascites. In a Phase II/III trial in cancer patients (n = 258) with malignant ascites, catumaxomab showed a clear clinical benefit vs. paracentesis and had an acceptable safety profile. Human antimouse antibodies (HAMAs), which could be associated with beneficial humoral effects and prolonged survival, may develop against catumaxomab as it is a mouse/rat antibody. This post hoc analysis investigated whether there was a correlation between the detection of HAMAs 8 days after the fourth catumaxomab infusion and clinical outcome. HAMA-positive and HAMA-negative patients in the catumaxomab group and patients in the control group were analyzed separately for all three clinical outcome measures (puncture-free survival, time to next puncture and overall survival) and compared to each other. There was a strong correlation between humoral response and clinical outcome: patients who developed HAMAs after catumaxomab showed significant improvement in all three clinical outcome measures vs. HAMA-negative patients. In the overall population in HAMA-positive vs. HAMA-negative patients, median puncture-free survival was 64 vs. 27 days (p < 0.0001; HR 0.330), median time to next therapeutic puncture was 104 vs. 46 days (p = 0.0002; HR 0.307) and median overall survival was 129 vs. 64 days (p = 0.0003; HR 0.433). Similar differences between HAMA-positive and HAMA-negative patients were seen in the ovarian, nonovarian and gastric cancer subgroups. In conclusion, HAMA development may be a biomarker for catumaxomab response and patients who developed HAMAs sooner derived greater benefit from catumaxomab treatment.

1878 related Products with: Humoral response to catumaxomab correlates with clinical outcome: results of the pivotal phase II/III study in patients with malignant ascites.

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#14511401   2003/09/26 Save this To Up

Evaluation of novel antimouse VEGFR2 antibodies as potential antiangiogenic or vascular targeting agents for tumor therapy.

We generated a panel of eight rat IgG(2a) monoclonal antibodies with high affinity for mouse VEGFR2 (KDR/Flk-1), the main receptor that mediates the angiogenic effect of VEGF-A. The antibodies (termed RAFL, R at Anti Flk) bound to dividing endothelial cells more strongly than they did to nondividing cells. Most of the RAFL antibodies blocked [(125)I]VEGF(165) binding to VEGFR2. Three of eight antibodies localized to VEGFR2-positive tumor endothelium after intravenous injection into mice bearing orthotopic MDA-MB-231 breast carcinomas, as judged by indirect immunohistochemistry. An average of 60% of vessels in the tumors was stained. The majority (50-80%) of vessels were also stained in a variety of other human and murine tumors growing in mice. The antibodies did not bind detectably to the vascular endothelium in normal heart, lung, liver, and brain cortex, whereas the vascular endothelium in kidney glomerulus and pancreatic islets was stained. Treatment of mice bearing orthotopic MDA-MB-231 tumors with RAFL-1 antibody inhibited tumor growth by an average of 48% and reduced vascular density by 65%, compared to tumors in mice treated with control IgG. Vascular damage was not observed in normal organs, including kidneys and pancreas. These studies demonstrate that anti-VEGFR2 antibodies have potential for vascular targeting and imaging of tumors in vivo.

2907 related Products with: Evaluation of novel antimouse VEGFR2 antibodies as potential antiangiogenic or vascular targeting agents for tumor therapy.

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#12351401   2002/09/27 Save this To Up

The role of SAP in murine CD150 (SLAM)-mediated T-cell proliferation and interferon gamma production.

CD150 (signaling lymphocyte activation molecule [SLAM]) is a self-ligand cell surface glycoprotein expressed on T cells, B cells, macrophages, and dendritic cells. To further explore the role of CD150 signaling in costimulation and T(H)1 priming we have generated a panel of rat antimouse CD150 monoclonal antibodies. CD150 cell surface expression is up-regulated with rapid kinetics in activated T cells and lipopolysaccharide/interferon gamma (IFN-gamma)-activated macrophages. Anti-CD150 triggering induces strong costimulation of T cells triggered through CD3. DNA synthesis of murine T cells induced by anti-CD150 is not dependent on SLAM-associated protein (SAP, SH2D1A), because anti-CD150 induces similar levels of DNA synthesis in SAP(-/-) T cells. Antibodies to CD150 also enhance IFN-gamma production both in wild-type and SAP(-/-) T cells during primary stimulation. The level of IFN-gamma production is higher in SAP(-/-) T cells than in wild-type T cells. Anti-CD150 antibodies also synergize with interleukin 12 (IL-12) treatment in up-regulation of IL-12 receptor beta(2) mRNA during T(H)1 priming, and inhibit primary T(H)2 polarization in an IFN-gamma-dependent fashion. Cross-linking CD150 on CD4 T cells induces rapid serine phosphorylation of Akt/PKB. We speculate that this is an important pathway contributing to CD150-mediated T-cell proliferation.

1052 related Products with: The role of SAP in murine CD150 (SLAM)-mediated T-cell proliferation and interferon gamma production.

Epidermal Growth Factor ( Epidermal Growth Factor ( Human Interferon-gamma IF Mouse Interferon gamma IF Rat Interferon gamma IFN- Interferon gamma Rat anti mouse Interferon Human Interferon gamma EL Rat monoclonal anti mouse Hamster anti mouse Interf Interferon-γ | Interfer Interferon γ | Interfer

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#10910285   2000/08/03 Save this To Up

Synergistic effect of anti-T cell receptor monoclonal antibody and 15-deoxyspergualin on cardiac xenograft survival in a mouse-to-rat model.

Successful xenograft transplantation faces several obstacles including the presence of xenoantibodies, natural killer cell- and macrophage-mediated rejection, and T lymphocyte activation.

1214 related Products with: Synergistic effect of anti-T cell receptor monoclonal antibody and 15-deoxyspergualin on cardiac xenograft survival in a mouse-to-rat model.

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#10381487   1999/08/06 Save this To Up

Anti-inflammatory effects of systemic anti-tumour necrosis factor alpha treatment in human/murine SCID arthritis.

To evaluate in vivo the contribution of tumour necrosis factor alpha (TNFalpha) to the chimeric transfer model of human rheumatoid arthritis synovial membrane into SCID mice (hu/mu SCID arthritis), systemic anti-TNFalpha treatment was performed and the clinical, serological, and histopathological effects of this treatment assessed.

1793 related Products with: Anti-inflammatory effects of systemic anti-tumour necrosis factor alpha treatment in human/murine SCID arthritis.

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#8977262   1997/02/06 Save this To Up

Surface and mRNA expression of the CD52 antigen by human eosinophils but not by neutrophils.

Eosinophilic and neutrophilic granulocytes represent major effector cells in the inflammatory response. Whereas neutrophils are predominantly involved in bacterial infections, eosinophils are of essential importance in the allergic inflammation. Surface markers have been used to distinguish neutrophils (CD16+) from eosinophils (CD16-) and might indicate different functional properties of these cells. In this study, expression and functional activity of CD52 on human eosinophils and neutrophils was investigated in nonatopic healthy donors and from patients with hypereosinophilia. Flow cytometric analysis using different anti-CD52 monoclonal antibodies (MoAbs) (mouse IgG3, humanized IgG1, and rat IgM) showed significant and homogeneous expression of CD52 on human eosinophils, but not on neutrophils. In addition, reverse transcription-polymerase chain reaction and Northern blot analysis showed that CD52 mRNA was constitutively expressed in eosinophils but not in neutrophils. Furthermore, expression of CD52 could be diminished in a dose-dependent manner by preincubation of eosinophils with phosphatidylinositol-specific phospholipase C, suggesting that CD52 on eosinophils is anchored to the membrane through a glycosylphosphatidylinositol (GPI) molecule. Whereas the phorbolester phorbol myristate acetate was able to downregulate the expression of CD52 on eosinophils in a dose-dependent manner, different eosinophil activating cytokines and chemotaxins had no effect. Cross-linking of CD52 by mouse anti-CD52 MoAb (IgG3) and humanized anti-CD52 MoAb (IgG1) with goat antimouse antibody and mouse antihuman antibody, respectively, dose-dependently resulted in an inhibition of reactive oxygen species production of eosinophils after stimulation with C5a, platelet-activating factor, and granulocyte-macrophage colony-stimulating factor. In summary, this study shows that the GPI-anchored antigen CD52 is not only a useful marker to distinguish eosinophils from neutrophils. The data point out a novel role of the CD52 antigen on human eosinophils that might be of clinical relevance, because cross-linking of this molecule will stop the destructive power of human eosinophils in the inflammatory tissue.

1142 related Products with: Surface and mRNA expression of the CD52 antigen by human eosinophils but not by neutrophils.

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#7641199   1995/09/18 Save this To Up

Inhibition of lymphoma growth in vivo by combined treatment with hydroxyethyl starch deferoxamine conjugate and IgG monoclonal antibodies against the transferrin receptor.

Synergistic inhibition of hematopoietic tumor growth can be observed in vitro when the iron chelator deferoxamine (DFO) is used in combination with an IgG mAb against the anti-transferrin receptor antibody (ATRA). Our goal was to ascertain whether similar findings could be seen in vivo. A high molecular weight conjugate of deferoxamine, known as hydroxyethyl starch (HES) DFO or HES-DFO, was tested in conjunction with C2, a well-defined rat antimouse transferrin receptor mAb, against the 38C13 tumor in C3H/HeN mice. It was shown that while neither HES-DFO alone nor C2 alone produced consistent, significant inhibition of tumor growth, the combination of HES-DFO and C2 produced virtually complete inhibition of initial tumor outgrowth. The latter combination failed, however, to inhibit the growth of established tumors. It was then found that when C2 was used in conjunction with RL34, another IgG ATRA, the two ATRAS were themselves capable of causing synergistic inhibition of the growth of 38C13 in vitro. When the two IgG ATRAS were used together in vivo, regressions of established tumors were observed. Moreover, the addition of HES-DFO to the IgG ATRA pair then caused more frequent regressions. Although there was never any obvious toxicity seen with a single IgG ATRA, the use of the IgG ATRA pair was associated with sporadic mortality. In addition, although HES-DFO by itself was also not associated with any obvious toxicity, combined treatment with HES-DFO and a single ATRA resulted in death due to bacterial infection in about half of the mice after 10-15 days. Combined treatment with HES-DFO and the ATRA pair resulted in death attributed to infection in nearly all of the mice after 6 days. Thus, an iron deprivation treatment protocol with HES-DFO and IgG ATRAS produced both a significant antitumor effect and an increased risk of infection in a murine model system.

1311 related Products with: Inhibition of lymphoma growth in vivo by combined treatment with hydroxyethyl starch deferoxamine conjugate and IgG monoclonal antibodies against the transferrin receptor.

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#7634801   1995/09/14 Save this To Up

Contribution of tumor necrosis factor-alpha to pulmonary cytokine expression and lung injury after hemorrhage and resuscitation.

To examine the role of tumor necrosis factor-alpha (TNF-alpha) in producing acute inflammatory lung injury after hemorrhage and resuscitation.

1551 related Products with: Contribution of tumor necrosis factor-alpha to pulmonary cytokine expression and lung injury after hemorrhage and resuscitation.

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#7584505   1995/12/12 Save this To Up

Helplessness as a strategy for avoiding antiglobulin responses to therapeutic monoclonal antibodies.

The antiglobulin (anti-Ig) response to therapeutic monoclonal antibodies (mAbs) poses a significant obstacle to their routine application in man. Whilst humanization has lessened the problem, repeated courses of humanized mAbs still sensitise some patients. Previous work suggested that unresponsiveness to cell-binding (therapeutic) mAbs could not be achieved due to an unexpected immunogenicity of their idiotypes (ids). The current work examines this phenomenon in more detail using CBA/Ca mice receiving rat antimouse CD8 mAbs as a model system. It is shown that the anti-Ig response is dependent on CD4+ T-cells. Furthermore, for at least some mAbs, most helper epitopes appear to reside within the mAb c-region. Consequently, when tolerance is induced to c-region (isotype), the anti-id response is extremely weak (induced helplessness). For one (weakly immunogenic) CD8 mAb concomitant administration of a CD4 mAb was sufficient to induce tolerance, whereas for another (more immunogenic) CD8 mAb, tolerance could only be achieved by prior concomitant exposure to both a CD4 mAb and an isotype-matched non-cell-binding mAb. The general applicability of these results is discussed and extrapolated to the clinical situation. Non-cell-binding variants of therapeutic mAbs could be usefully exploited to generate therapeutic unresponsiveness to any clinically useful mAb.

2687 related Products with: Helplessness as a strategy for avoiding antiglobulin responses to therapeutic monoclonal antibodies.

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