purpose: to report the outcomes of surgical and non-surgical treatment for sixth nerve palsy and paresis in our center. methods: hospital records of 33 patients (35 eyes) with sixth nerve dysfunction who were referred to labbafinejad medical center from september 1996 to september 2006 and underwent surgical procedures or botulinum toxin injection were reviewed. results: patients were divided i...

Fragment C of tetanus toxin appears to retain most of the determinants of the tetanus toxin molecule insofar as interactions with neural or thyroid membranes and with gangliosides are concerned. Thus, unlabeled fragment C is nearly as effective as unlabeled tetanus toxin in inhibiting the binding of either ‘251-labeled toxin or ‘251-labeled thyrotropin to neural or thyroid membranes. ‘251-label...

The role of Rho proteins in lysophosphatidic acid (LPA)-mediated induction of cyclo-oxygenase-2 (Cox-2) was investigated in renal mesangial cells. Previous studies had shown that toxin B, an inhibitor of Rho, Rac and Cdc42, suppressed Cox-2 induction. A role for RhoA in pertussis toxin-sensitive LPA signalling was excluded with C3 transferase from Clostridium limosum, used as the fusion toxin C...

A rapid and simple method for detecting exfoliative toxin serotypes A and B from clinical isolates has been developed as a test kit (EXT-RPLA; Denka Seiken Co. Ltd., Niigata, Japan). This method is based on reversed passive latex agglutination. The detection limit of the EXT-RPLA observed for purified exfoliative toxin serotypes A and B was 1 ng/ml. We evaluated the clinical and epidemiologic u...

Botulinum toxin (BoNT), being one of the most toxic substances known to mankind, due its unique mechanism action is used as an effective treatment for many diseases, including strabismus, blepharospasm, and hemifacial spasm. BoNT has received particular use a long-acting analgesic ability inhibit exocytosis pain neuropeptides, CGRP, Substance P, modulate expression pain-related receptors TRPV1,...

Clostridium botulinum type A, B, and F toxins of different molecular sizes were fed to mice to compare the oral toxicities. The progenitor toxin, a complex of a toxic and nontoxic component, of any type was higher in oral toxicity to mice than the dissociated toxic component or the derivative toxin. The former may no doubt play a more important role in the pathogenesis of food-borne botulism. T...

Clostridium perfringens is capable of producing up to 15 toxins, including alpha-toxin (CPA), beta-toxin (CPB), epsilon-toxin (ETX), enterotoxin, beta2-toxin (CPB2), and perfringolysin O. Type B isolates, which must produce CPA, CPB, and ETX, are associated with animal illnesses characterized by sudden death or acute neurological signs, with or without intestinal damage. Type B pathogenesis in ...

A/B toxins such as cholera toxin, Pseudomonas exotoxin and killer toxin K28 contain a KDEL-like amino acid motif at one of their subunits which ensures retrograde toxin transport through the secretory pathway of a target cell. As key step in host cell invasion, each toxin binds to distinct plasma membrane receptors that are utilized for cell entry. Despite intensive efforts, some of these recep...

Enterohemorrhagic Escherichia coli producing Shiga toxins 1 and/or 2 have become major foodborne pathogens. The specific binding of Shiga toxin 1 B-subunit to its receptor, a neutral glycolipid globotriaosylceramide Gb(3), on the apical surface of colonic epithelium followed by toxin entry into cells are the initial steps of the process, which can result in toxin transcytosis and systemic effec...