T-2 toxin is a secondary fungal metabolite produced by various species of Fusarium. It is capable of killing cells by causing extensive damage to the cellular membrane. In this study, cytotoxicity of T-2 toxin in combination with different antioxidant materials, including vitamin C (vit. C), vitamin E (vit. E) and selenium (sel) was investigated in vitro using the neutral red cytotoxicity assay...

Killer toxin K1 is a heterodimeric protein toxin secreted by Saccharomyces cerevisiae strains infected with the M1 double-stranded RNA 'killer' virus. After binding to a primary receptor at the level of the cell wall, K1 interacts with its secondary plasma membrane receptor Kre1p, eventually leading to an ionophoric disruption of membrane function. Although it has been under investigation for d...

The Rockefeller University Press $30.00 J. Gen. Physiol. 2016 Vol. 148 No. 4 273–275 www.jgp.org/cgi/doi/10.1085/jgp.201611681 273 Anthrax toxin is a three-protein toxin that must first assemble before carrying out its physiological function of menacing its eukaryotic host. Much has been done, therefore, to study its assembly both in vitro and on cell surfaces. The three proteins that comprise ...

BACKGROUND Escherichia coli Shiga-like toxin 1 normally traffics to the endoplasmic reticulum (ER) in sensitive mammalian cells from where the catalytic A chain (SLTxA1) dislocates to the cytosol to inactivate ribosomes. Currently, no molecular details of the dislocation process are available. To investigate the mechanism of the dislocation step we expressed SLTxA1 in the ER of Saccharomyces ce...

designing and producing a proper fusion construction is the most important problem of producing large quantities of a properly folded functional protein. this construction should have all necessary components of a real gene. a good designed fusion gene construction could be cloned into a good and suitable host. clostridium perfringens is an important pathogen of humans and livestock and produce...

Phagocytosis occurs primarily through two main processes in macrophages: the Fcγ receptor- and the integrin αMβ2-mediated processes. Complement C3bi-opsonized particles are known to be engulfed through integrin αMβ2-mediated process, which is regulated by RhoA GTPase. C3 toxin fused with Tat-peptide (Tat-C3 toxin), an inhibitor of the Rho GTPases, was shown to markedly inhibit the phagocytosis ...

The protective antigen moiety of anthrax toxin translocates the toxin's enzymic moieties to the cytosol of mammalian cells by a mechanism that depends on its ability to heptamerize and insert into membranes. We identified dominant-negative mutants of protective antigen that co-assemble with the wild-type protein and block its ability to translocate the enzymic moieties across membranes. These m...

In the course of three experiments it was established that all the toxic effects of a lethal dose of Albizia versicolor pods (greater than 4.5 g/kg) in guinea-pigs could be countered by concurrent subcutaneous injection of pyridoxine (10 mg/kg). This treatment was also successful once severe symptoms had set in. Pyridoxal, on the other hand, was found to be ineffective as a therapeutic agent. T...

Achalasia cardia is a motility disorder of the esophagus characterized by failure of relaxation of the lower esophageal sphincter. Nitrates and calcium channel blockers, pneumatic dilatation, botulinum toxin injection and surgical myotomy have been described in literature as possible management options. We present a patient who presented with achalasia and was co-incidentally diagnosed to have ...