objective: verotoxin is a member of shiga toxin family. this family contains ab protein toxins with an enzymatic (a) and a binding (b) compartment. cells that have receptor (gb3) are sensitive to cytotoxic effects of toxin. it has been shown that various tumor cells have gb3 receptor and are selectively sensitive to apoptotic effect of verotoxin. studies on tumor cell lines and laboratory anima...

An extremely effective way of preventing damage to and enhancing treatment of dental hard tissues and restorations would be to ''de-programme'' the muscles responsible for excessive destructive forces and other gnathological-related diseases. The new paradigm is the intramuscular injection of Botulinum toxin type A (BOTOX) into the affected muscles. It is a natural protein produced by anaerobic...

Shiga toxin-producing Escherichia coli (STEC) may cause bloody diarrhea and hemorrhagic colitis (HC), with subsequent systemic disease. Since genes coding for Shiga toxins (stx genes) are located on lambdoid prophages, their effective production occurs only after prophage induction. Such induction and subsequent lytic development of Shiga toxin-converting bacteriophages results not only in prod...

Berberis vulgaris L (B. vulgaris) and its main constituent berberine have been used in traditional medicine for a long time. This medicinal plant and berberine have many properties that have attracted the attention of researchers over the time. According to several studies, B. vulgaris and berberine exhibited anti-inflammatory, antioxidant, anticonvulsant, antidepressant, anti-Alzheimer, anti-c...

The aim of the work was a comparative study expression main virulence genes in Vibrio cholerae strains classical biovar, typical and genetically modified V. , El Tor biovar. Materials methods . Natural toxigenic O1, biovar (J89, Pakistan, 1969), (M-887, Astrakhan, 1970) (301, Taganrog, 2011) were used as model ones. grown under optimum conditions for production cholera toxin toxin-coregulated p...

botulinum toxin produced by clostridium butolinum in one of the most fatal toxins known. botulism is the name given to condition produced by this toxin. in recent years the diluted form of this toxin has been produced in injection form and used for treatment of hemifacial spasm and blepharospasm. this toxin blocks neuromuscular junction and inhibits acetylcholine release. in this article we rep...

cholera toxin b subunit (ctxb) is a homopantameric, nontoxic subunit of cholera toxin that is responsible for its binding to the cell and has been known as a mucosal adjuvant for vaccines that could increase homoral and mocusal immunity response. in this work, the ctxb gene was fused to the stxb gene from shigella dysenteriae type i a vaccine antigen candidate against this pathogen, by a nonfur...

introduction:poisoning is a common reasons for hospitalization in all over the world and exhausts a substantial share of health resources.khoramabad is a rather large city in iran but there has been no study about incidence of poisoned patients especially grave ones who are hospitalized in icus, thus we designed this study to epidemiologicall assess these patients in two major referral centers ...

Brown spot disease caused by Alternaria alternata (Fr.: Fr.) Keissl is a serious problem forproduction of tangerines and tangerine hybrids in Iran. The Tangerine pathotype causes brownspot disease on young leaves and immature fruits of limited varieties of mandarins and tangerines(Citrus. reticulata Blanco). Specificity in the interaction between tangerine and the pathogen isdetermined by a hos...