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Página 1 a partir de 30 resultados
[Experimental hyperthermia induced by ricin in the rat. Its value in pharmacodynamics].
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[Ricin--from a Bulgarian umbrella to an optional treatment of cancer].
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Ricin toxin, found in the bean of the castor plant, is one of the most toxic and easily produced plant toxin. It is composed of two polypeptide chains linked by a disulfide bond. The toxin irreversibly blocks protein synthesis. Oral intoxication is the most frequent mode of exposure, but direct
A combination of anti-CD3 and anti-CD7 ricin A-immunotoxins for the in vivo treatment of acute graft versus host disease.
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This study evaluated the anti-graft versus host disease (GVHD) potential of a combination of immunotoxins (IT), consisting of a murine CD3 (SPV-T3a) and CD7 (WT1) monoclonal antibody both conjugated to deglycosylated ricin A. In vitro efficacy data demonstrated that these IT act synergistically,
Phase I study of monoclonal antibody-ricin A chain immunotoxin XomaZyme-791 in patients with metastatic colon cancer.
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Monoclonal antibody 791T/36, recognizing a Mr 72,000 antigen on the surface of colon carcinoma cells, has been used to construct an immunotoxin by conjugating to it the ribosomal inhibitor protein, ricin toxin A chain. The antibody 791T/36 has been shown to bind to membranes of freshly disaggregated
Therapy of patients with malignant melanoma using a monoclonal antimelanoma antibody-ricin A chain immunotoxin.
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We conducted a trial of a murine monoclonal antimelanoma antibody-ricin A chain immunotoxin (XOMAZYME-MEL) in 22 patients with metastatic malignant melanoma. The dose of immunotoxin administered ranged from 0.01 mg/kg daily for 5 days to 1 mg/kg daily for 4 days (total dose: 3.2 to 300 mg). Side
The toxicity of chemically deglycosylated ricin A-chain in mice.
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Tumor-reactive antibodies coupled to ricin or its A-chain (immunotoxins) have been used in rodents and humans to treat a variety of neoplastic diseases. Side-effects of such treatment include hepatotoxicity, vascular leak syndrome, myalgia and low grade fever. At high doses, severe toxicities
Anti-B4-blocked ricin: a phase I trial of 7-day continuous infusion in patients with B-cell neoplasms.
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OBJECTIVE
This phase I trial was undertaken to determine the maximum-tolerated dose (MTD) and dose-limiting toxicities (DLTs) of the B-cell-restricted immunotoxin anti-B4-blocked ricin (anti-B4-bR) when it is administered by 7-day continuous infusion.
METHODS
Thirty-four patients with relapsed and
Hyperthermia potentiates the activity of immunotoxin conjugates against common acute lymphoblastic leukaemia cells in vitro.
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We studied the in-vitro cytotoxic effect of hyperthermia at 42 degrees C, both alone and in combination with ricin-linked immunotoxins, reactive with the common acute lymphoblastic leukaemia cell lines Reh and KM-3. Assessment of cytotoxicity was by incorporation of 3H-leucine and limiting dilutions
Use of the immunotoxin N901-blocked ricin in patients with small-cell lung cancer.
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In patients with small-cell lung cancer (SCLC), relapse with resistant disease often causes death. N901-blocked ricin (N901-bR), a murine monoclonal antibody (MAb)-blocked ricin immunotoxin, is a potential therapeutic for SCLC. N901-bR targets CD56, present on SCLC and cells of neuro-ectodermal
Serotherapy of B-cell neoplasms with anti-B4-blocked ricin: a phase I trial of daily bolus infusion.
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Anti-B4-blocked Ricin (Anti-B4-bR) is an immunotoxin comprised of the anti-B4 monoclonal antibody (MoAb) and the protein toxin "blocked ricin." The anti-B4 MoAb is directed against the B-lineage-restricted CD19 antigen expressed on more than 95% of normal and neoplastic B cells. Blocked ricin is an
Toxicity of abrin and ricin in mice and dogs.
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Mice and dogs, were treated iv with the cytostatic proteins abrin and ricin and observed for clinical, biochemical, and morphological aberrations. In both mice and dogs death occurred within a narrow dose range. Dogs given toxic doses of ricin and abrin showed weakness, anorexia, apathy, and
A phase I study of T101-ricin A chain immunotoxin in refractory chronic lymphocytic leukemia.
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Four patients with chronic lymphocytic leukemia refractory to alkylating agents were treated with T101-ricin A chain immunotoxin (T101-RTA) as part of a phase I study. Over a 4-week period, each patient received eight intravenous infusions of 3 mg/m2 T101-RTA over 1 h. All infusions were well
Ricin poisoning: a comprehensive review.
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BACKGROUND
The recent discoveries of ricin, a deadly biologic toxin, at a South Carolina postal facility, a White House mail facility, and a US senator's office has raised concerns among public health officials, physicians, and citizens. Ricin is one of the most potent and lethal substances known,
Clinical and Pathological Findings Associated with Aerosol Exposure of Macaques to Ricin Toxin.
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Ricin is a potential bioweapon that could be used against civilian and military personnel. Aerosol exposure is the most likely route of contact to ricin toxin that will result in the most severe toxicity. Early recognition of ricin exposure is essential if specific antidotes are to be applied.
Phase I study of monoclonal antibody-ricin A chain immunoconjugate Xomazyme-791 in patients with metastatic colon cancer.
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The immunoconjugate XMMCO-791/RTA consists of ricin A chain bound to a murine monoclonal antibody MoAb 791T. This monoclonal antibody (MoAb) binds to a glycoprotein of 72 kD, which is expressed on human colorectal carcinoma, ovarian carcinoma, and osteogenic sarcoma. XMMCO-791/RTA was tested in a
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