background: cholera toxin b subunit (ctb) has been extensively considered as an immunogenic and adjuvant protein, but its yield of expression is not satisfactory in many studies. the aim of this study was to compare the expression of native and mutant recombinant ctb (rctb) in pqe vector. methods: ctxb fragment from vibrio cholerae o1 atcc14035 containing the substitution of mutant ctxb for ami...

abstract         background and objective: hirudin is an anticoagulant polypeptide secreted from the salivary glands of leeches. recombinant hirudin is a strong anticoagulant agent in arterial and venous thrombosis. the aim of this study was to evaluate the effect of inserting protein a signal peptide sequence of pezz18 plasmid on expression and secretion of the recombinant hirudin in e.coli.  ...

Brucella bacterium causes Brucellosis, an infectious disease spreading from animals to human. Brucella lumazine synthase (BLS) is a highly immunogenic protein with adjuvant properties, which has been introduced as an effective protein carrier for vaccine development. This protein also plays a significant role in inducing immune system. This study aimed to clone, express, and purify the BLS gene...

the interaction between immune cells and endothelial lining of blood vessels is vital in many processes such as inflammatory and immune responses as well as cancer cell metastasis. the expression level of vcam-1 is regulated by many factors including the promoter activity that is possibly affected by the single nucleotide polymorphisms (snps) present in the promoter. there are previous reports ...

Background: Follicle-stimulating hormone (FSH) belongs to the family of glycoprotein hormones that composing alpha and beta subunits with non-covalently bonds. This hormone involve in regulation of the reproductive processes such as gamete generation and follicular growth. Injection of the hormone in most of fish species increases 17 beta-estradiol production by ovarian tissue and also stimulat...

background and aims: dna constructs containing hcv antigens have become one of the vaccine candidates for induction of anti-hcv cellular and humoral immunity. in this study, we constructed a novel expressing vector harboring a fusion sequence derived from an overlapping fragment in the middle of ns3 and a truncated core fragment to avoid troubles reported to be associated with full gene express...

Background: Chlamydomonas reinhardtii is a novel recombinant eukaryotic expression system with many advantages including fast growth rate, rapid scalability, absence of human pathogens and the ability to fold and assemble complex proteins accurately, however, obstacle relatively low expression level necessitates optimizing foreign gene expression in this system. The Green Fluorescent Protein (G...

objective: in this study, two conserved genes (m1 and np) of influenza virus were expressed in a bicistronic vector in order to develop a universal gene based vaccine. materials and methods: plasmids m1-pires2-egfp, pires2-np were constructed by cloning the pcr products of m1 and np genes which were amplified from the a/peurto rico/8/34 (h1n1) influenza virus strain into the plasmid expression...