نوع مقاله : Original Article(s)
نویسندگان
1 دانشجوی دکتری، گروه فارماکولوژی و سمشناسی، دانشکدهی داروسازی، علوم پزشکی تهران، دانشگاه آزاد اسلامی، تهران، ایران
2 دانشیار، گروه میکروبیولوژی، دانشکدهی علوم و فناوری های نوین، علوم پزشکی تهران، دانشگاه آزاد اسلامی، تهران، ایران
3 استاد، گروه فارماکولوژی و سمشناسی، دانشکدهی داروسازی، علوم پزشکی تهران، دانشگاه آزاد اسلامی، تهران، ایران
4 استادیار، گروه فارماکولوژی و سمشناسی، دانشکدهی داروسازی، علوم پزشکی تهران، دانشگاه آزاد اسلامی، تهران، ایران
5 دانشیار، مرکز تحقیقات بیوتکنولوژی، مرکز تحقیقات واکسن نوترکیب، دانشگاه علوم پزشکی تهران، تهران، ایران
چکیده
تازه های تحقیق
Mehdi Mirshekar: Google Scholar
Setareh Haghighat: Google Scholar
Seyedeh Zahra Mousavi: Google Scholar
Amir Hossein Abdolghaffari: Google Scholar
Mohammad Hossein Yazdi: Google Scholar
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Background: Staphylococcus aureus is one of the leading causes of nosocomial infections, therefore, it is necessary to develop a suitable vaccine candidate to prevent infections caused by this bacterium. Autolysin protein as a virulence factor plays an important role in bacterial division. Monophosphoryl lipid A (MPLA) as a Toll-like receptor 4 agonist is currently used as an adjuvant. In this study, autolysin protein along with MPLA was investigated as a vaccine candidate.
Methods: Recombinant autolysin was expressed with IPTG and purified by Ni-NTA affinity chromatography. To increase the immunogenicity of vaccine candidates, Monophosphoryl lipid A (biologic and synthetic) was formulated in combination with Alum in four groups of Balb/c mice. Animals were injected subcutaneously three times at intervals of two weeks. Total IgG and IgG1, IgG2a isotype antibodies were measured in sera by indirect ELISA technique. Then, experimental mice were challenged with a sub-lethal dose of Staphylococcus Strain (5×108 CFU) and following that, the number of bacteria from internal organs was assessed. Also, the survival rate was monitored daily for 30 days.
Findings: Total IgG, IgG1, and IgG2a isotype antibody levels were significantly improved in vaccinated groups in comparison to the control group. Bacterial burden in the internal organ (Liver, spleen, and kidney), and animal mortality of the vaccinated group especially r-Autolysin+Alum+MPLA Synthetic and r-Autolysin+Alum+MPLA biologic were decreased in comparison to the control group.
Conclusion: We concluded that synthetic MPLA is a reliable candidate for immune response improvement against Staphylococcal infection.
کلیدواژهها [English]
مهدی میرشکار: Google Scholar
ستاره حقیقت: Google Scholar
سیده زهرا موسوی: Google Scholar
امیر حسین عبد الغفاری: Google Scholar
محمد حسین یزدی: Google Scholar