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pokeweed antiviral protein/càncer
L'enllaç es desa al porta-retalls
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Anti-CD30 (BER=H2) immunotoxins containing the type-1 ribosome-inactivating proteins momordin and PAP-S (pokeweed antiviral protein from seeds) display powerful antitumour activity against CD30+ tumour cells in vitro and in SCID mice.
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The anti-CD30 immunotoxin (IT) Ber-H2/saporin is effective in patients with refractory Hodgkin's disease. However, responses are short and partial, one of the main reasons being the inability to repeat IT doses because of formation of human antibodies against the murine antibody and/or the toxin. To
In vitro and in vivo cytotoxicity of an anti-osteosarcoma immunotoxin containing pokeweed antiviral protein.
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Successful treatment of many patients with osteosarcoma requires more effective chemotherapy. Since new agents are needed, we have developed an immunotoxin using TP-3, an IgG2b mAb which recognizes human and canine osteosarcomas and budding capillaries of tumors. The plant hemitoxin, pokeweed
Pokeweed antiviral protein, a ribosome inactivating protein: activity, inhibition and prospects.
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Viruses employ an array of elaborate strategies to overcome plant defense mechanisms and must adapt to the requirements of the host translational systems. Pokeweed antiviral protein (PAP) from Phytolacca americana is a ribosome inactivating protein (RIP) and is an RNA N-glycosidase that removes
Cytotoxic activity of a recombinant GnRH-PAP fusion toxin on human tumor cell lines.
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Pokeweed antiviral protein (PAP), a ribosome-inactivating protein isolated from the leaves of Phytolacca americana, reveals potent antiviral activity against viruses or cytotoxic action against cells once inside the cytoplasm. Therefore PAP is a good candidate to be used as an immunotoxin. We
Immunotoxins to a human melanoma-associated antigen: resistance to pokeweed antiviral protein conjugates in vitro.
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Pokeweed antiviral protein (PAP) from the summer leaves of Phytolacca americana was purified and conjugated via N-succinimidyl-3-(2-pyridyldithio)propionate to 9.2.27 anti-melanoma antibody to a glycoprotein-proteoglycan complex. The conjugate was highly potent (50% inhibition dose of 5 X
High-level expression and purification of biologically active recombinant pokeweed antiviral protein.
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Pokeweed antiviral protein (PAP) from the leaves of the pokeweed plant, Phytolacca americana, is a naturally occurring single-chain ribosome-inactivating protein, which catalytically inactivates both prokaryotic and eukaryotic ribosomes. The therapeutic potential of PAP has gained considerable
Production of a pokeweed antiviral protein (PAP)-containing immunotoxin, B43-PAP, directed against the CD19 human B lineage lymphoid differentiation antigen in highly purified form for human clinical trials.
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We describe a standardized method for the preparation and purification of a potent immunotoxin against B-lineage leukemia/lymphoma cells, constructed with the ribosome inhibitory single chain plant toxin pokeweed antiviral protein (PAP) and a murine IgG1 monoclonal antibody (MoAb) specific for the
Cytotoxic activity of gonadotropin-releasing hormone (GnRH)-pokeweed antiviral protein conjugates in cell lines expressing GnRH receptors.
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Pokeweed antiviral protein (PAP), a 29-kDa ribosome-inactivating protein isolated from the leaves of Phytolacca americana, has potent cytotoxic activity once it enters the cytoplasm of a cell. It is incapable of entering cells by itself. Therefore, our objective was to determine whether a GnRH
Pokeweed antiviral protein: ribosome inactivation and therapeutic applications.
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Pokeweed antiviral protein (PAP) is a ribosome-inactivating protein (RIP) that inactivates ribosomes by the removal of a single adenine from ribosomal RNA. The studies summarized in our review concern the nature and application of this novel therapeutic agent. We describe how researchers continue to
Antitumor activity of TP3(anti-p80)-pokeweed antiviral protein immunotoxin in hamster cheek pouch and severe combined immunodeficient mouse xenograft models of human osteosarcoma.
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TP3-pokeweed antiviral protein (PAP) immunotoxin is directed against the p80 antigen on osteosarcoma cells. Previous studies have demonstrated that TP3-PAP kills clonogenic human osteosarcoma cells in vitro and shows significant antitumor activity in a murine soft tissue sarcoma model (P. M.
[Cloning and expression of pokeweed antiviral protein gene from Phytolacca americana in Pichia pastoris and the study of apoptosis of human neuroglioma cells U251 induced by recombinant PAP].
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OBJECTIVE
To clone the pokeweed anti-viral protein (PAP) gene, to express it in Pichia pastoris, and to study the inhibitory effect of PAP on U251 in vitro.
METHODS
The cDNA sequence encoding PAP was cloned by Real-time PCR from Phytolacca americana. The recombinant PAP was subcloned into the
[Cloning and expression of pokeweed antiviral protein-II gene from the summer leaves of Phytolacca amercana].
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The cDNA sequence encoding pokeweed antiviral protein-II was cloned from the fresh summer leaves of phytolacca amercana by RT-PCR. The recombinant PAP-II was subcloned into the expression vector pET-28a(+) and expressed in E. coli BL21 after IPTG induction. SDS-PAGE analysis showed that the
Rapid screening with indirect immunotoxin for monoclonal antibodies against human small cell lung cancer.
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For the first time, a screening procedure for antitumor monoclonal antibodies (MOABs) has been developed in which the ability of MOABs to mediate the indirect action of another immunotoxin is the primary criterion for selection of hybridomas for expansion and cloning. Use of the indirect immunotoxin
Ex vivo elimination of neoplastic T-cells from human marrow using an anti-Mr 41,000 protein immunotoxin: potentiation by ASTA Z 7557.
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ASTA Z 7557 potentiated the ex vivo efficiency of a T-cell directed immunotoxin containing pokeweed antiviral protein (PAP). We used an immunotoxin of pan-T monoclonal antibody 3-A1 directed against p41 antigen expressed both on normal and leukemic T-cells. Treatment with 3A1-PAP in combination with
Characterization of translational inhibitors from Phytolacca americana. Amino-terminal sequence determination and antibody-inhibitor conjugates.
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Two translational inhibitors (pokeweed antiviral protein and pokeweed antiviral protein II) isolated from the leaves of the pokeweed plant, Phytolacca americana, were characterized as to their behavior during reverse-phase HPLC and their amino-terminal sequences. Alignment of the sequences
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