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Ribosome-Inactivating Protein α-Momorcharin Derived from Edible Plant Momordica charantia Induces Inflammatory Responses by Activating the NF-kappaB and JNK Pathways.

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Prijava / prijava

Alpha-momorcharin (α-MMC), a member of the ribosome-inactivating protein (RIP) family, has been found in the seeds of Momordica charantia (bitter melon). α-MMC contributes a number of pharmacological activities; however, its inflammatory properties have not been well studied. Here, we aim to

An Intranasally Administered Monoclonal Antibody Cocktail Abrogates Ricin Toxin-Induced Pulmonary Tissue Damage and Inflammation.

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Ricin toxin, a plant-derived, mannosylated glycoprotein, elicits an incapacitating and potentially lethal inflammatory response in the airways following inhalation. Uptake of ricin by alveolar macrophages (AM) and other pulmonary cell types occurs via two parallel pathways: one mediated by ricin's B

Detoxification of Abrus precatorius L. seeds by Ayurvedic Shodhana process and anti-inflammatory potential of the detoxified extract.

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BACKGROUND Abrus precatorius seeds traditionally used for the treatment of sciatica and alopecia contains the toxic protein, abrin, a Type II Ribosome Inactivating Protein. Ayurveda recommends the use of Abrus seeds after the Shodhana process (detoxification). OBJECTIVE The current study was aimed

Different neuronal toxicity of single-chain ribosome-inactivating proteins on the rat retina.

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OBJECTIVE To investigate the neurotoxicity of two structurally similar single chains of ribosome-inactivating proteins (RIPs): trichosanthin (TCS) and ricin A chain (RTA). METHODS TCS, RTA and Ricinus communis agglutinin (RCA, a multi-chain RIP for comparison) were separately injected into rat eyes.

Structure-activity relationships of saponins enhancing the cytotoxicity of ribosome-inactivating proteins type I (RIP-I).

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Saponins are amphiphilic secondary plant compounds able to interfere with surfaces and permeabilize membranes. In addition to antimicrobial and anti-inflammatory features, anti-neoplastic activities are described which base on various mechanisms. A very promising anti-cancer strategy is the

Transcriptional network inference and master regulator analysis of the response to ribosome-inactivating proteins in leukemia cells

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Gene-regulatory networks reconstruction has become a very popular approach in applied biology to infer and dissect functional interactions of Transcription Factors (TFs) driving a defined phenotypic state, termed as Master Regulators (MRs). In the present work, cutting-edge bioinformatic methods

Early Response to the Plant Toxin Stenodactylin in Acute Myeloid Leukemia Cells Involves Inflammatory and Apoptotic Signaling

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Stenodactylin, a highly toxic type 2 ribosome-inactivating protein purified from the caudex of Adenia stenodactyla Harms, is a potential anticancer drug candidate. Previous studies demonstrated that stenodactylin induces apoptosis and necroptosis in treated cells, involving the production of

Ribosome-inactivating proteins: progress and problems.

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Ribosome-inactivating proteins (RIPs), mostly from plants, are enzymes which depurinate rRNA, thus inhibiting protein synthesis. They also depurinate other polynucleotide substrates. The biological activity of RIPs is not completely clarified, and sometimes independent of the inhibition of protein

Critical role of Toll-Like Receptor 4 (TLR4) in Ricin toxin-induced inflammatory responses in macrophages.

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Prijava / prijava

Ricin toxin (RT) is a natural plant-derived protein toxin from the seed of castor beans that belongs to a family of type II ribosome-inactivating proteins (RIPs). In addition to its main toxic mechanism of inhibiting the synthesis of cellular proteins, RT can induce the production of inflammatory

Macrophage-derived IL-18-mediated intestinal inflammation in the murine model of Crohn's disease.

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OBJECTIVE Crohn's disease (CD) is associated with an increased number of infiltrating macrophages, which release a variety of proinflammatory cytokines. Interleukin (IL)-18 has been implicated in the modulation of mucosal CD4(+) T cells towards Th1 responses, which are implicated in the pathogenesis

Selective lesions of rabbit extraocular muscles injected with the anti-AChR immunotoxin saporin-mAb 73.

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OBJECTIVE To evaluate the effects on extraocular muscles of a skeletal muscle-specific immunotoxin, saporin-mAb 73, as an alternative to botulinum toxin to induce a permanent correction of oculo-facial dystonias or some forms of ocular motility disorders. METHODS An immunotoxin was prepared with a

Bacterial toxins: potential weapons against HIV infection.

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Natural toxins are the product of a long-term evolution, and have captured crucial events in the most essential and vital processes of living organisms. They can attack components of the protein synthesis machinery (as in the case of Diphteria and Shiga toxins, and Ribosome inactivating proteins),

Evaluation of abrin induced nephrotoxicity by using novel renal injury markers.

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Prijava / prijava

Abrin is a potent plant toxin analogous to ricin that is derived from the seeds of Abrus precatorius plant. It belongs to the family of type II ribosome-inactivating proteins and causes cell death by irreversibly inactivating ribosomes through site-specific depurination. In this study we examined

[Effect of PEGylation of alpha-Momorcharin against its hepatotoxicity in rats].

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OBJECTIVE To explore the effect of PEGylation of alpha-Momorcharin (alpha-MMC), one of ribosome-inactivating proteins from bitter melon seed, against its hepatotoxicity in rats. METHODS SD rats were randomized into NS group, alpha-MMC treated groups, and alpha-MMC-PEG treated groups. The doses of

Identification of small molecules that suppress ricin-induced stress-activated signaling pathways.

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Ricin is a member of the ribosome-inactivating protein (RIP) family of plant and bacterial toxins. In this study we used a high-throughput, cell-based assay to screen more than 118,000 compounds from diverse chemical libraries for molecules that reduced ricin-induced cell death. We describe three

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