Background: Leishmaniasis is a neglected disease affecting millions of people worldwide. The treatment of the disease is hampered due to high cost, toxicity and the crisis of drug resistance. Polytope approaches of genetic immunization could be a strategy for prevention of infectious diseases. Furthermore, the identification of Leishmania genome sequence and the application of bioinformatics assist us to devise an effective vaccine’ s candidate. Methods: A linear sequence from predicted epitopes of GP63, LACK and CPC antigens was designed and was optimized using online available algorithms. The synthesized sequence (LAKJB93) was ligated to pEGFP-N1 plasmid. Results: The 264bp sequence was cloned at N terminal of GFP into pEGFP_N1 expression vector and transfect into CHO cell line. Construct was efficient expressed in CHO cells. Conclusion: The protein of LAKJB93 cosnstruct was expressed in CHO cells successfully.

Introduction: Multiple sclerosis (MS) is a disease of the immune system: it attacks the myelin around the axons and leaves them exposed. Destruction of myelin weakens the electrical conduction of ions and thus leads to a lack of communication in the nervous system.Methods: In the present study, we constructed recombinant plasmid and then transformed to E.coli cell. The colonies containing plasmid were selected by Colony PCR. Enzyme digestion and sequencing were utilized to approve the accuracy of the extracted plasmid of these clones. Recombinant plasmid transfect in to mesanchymal stem cells.Results: Plasmid was verification correctly. After transfection, the transcription of MOG gene and the expression of MOG protein were proved by RT-PCR, western blotting and Elisa.Conclusion: Plasmid was constructed correctly and mesenchyme stem cells were successfully transfected by transfection and protein can be expressed well, setting a proper foundation for the future studies on the transplantation of gene modification mesanchymal stem cells in order to promote Multiple sclerosis.

Context: One of the most common aggressive and primary brain tumors is glioma. The majority of diagnoses are referred to highgrade malignant glioblastoma, which carries the worst prognosis. Still, treatment of brain tumors remains a big challenge for clinicians. This study was designed to investigate the efficacy of gene therapy in the treatment of brain cancer. Methods: Studies use genes as a therapeutic agent in brain cancer treatment even alone or in combination with other treatment methods. Full-text papers, which met the inclusion criteria, were independently assessed by two reviewers. Disagreements were resolved by consultation with a third reviewer. Results: Statistical analysis showed that 50% of the papers used a virus, 36% used polymers, and 14% used cells as carriers to transfect the genes as a therapeutic agent in brain tumor models. Data showed that the estimated size of the brain tumor was reduced by using co-treatment of the gene with one of the conventional therapies. Conclusions: According to the results, co-treatment of the gene with conventional therapies could be more effective than the monotherapy methods.

Background: Cutaneous leishmaniasis (CL) is a serious public health problem in many tropical countries. The infection is caused by a protozoan parasite of Leishmania genus transmitted by Phlebotominae sandflies. In the present study, we constructed a eukaryotic expression vector to produce a fusion protein containing LmSTI1 from Leishmania major (L. major) and PpSP42 from Phlebotomus papatasi (Ph. papatasi). In future studies we will test this construct as a DNA vaccine against zoonotic CL. Methods: The nucleotide sequences encoding the LmSTI1 protein and a fragment encoding 79% of PpSP42 were amplified using L. major and Ph. papatasi genomic DNA, respectively. The amplicons were cloned into the pcDNA3. 1(+) eukaryotic expression vector. The recombinant plasmid pcDNA-LmSTI1Pp42 was propagated in Escherichia coli (E. coli) and used to transfect HEK-293T cells. The expressed fusion protein was analyzed by Western blotting using anti-LmSTI1 mouse serum. Results: Sequences encoding LmSTI1 and partial PpSP42 were cloned into pcDNA3. 1(+). Production of the recombinant LmSTI1Pp42 fusion protein was confirmed by Western blotting. Conclusions: An LmSTI1Pp42 fusion protein was expressed in HEK-293T cells. This construct may be an effective DNA vaccine against CL.

Background: Hepatitis B Virus (HBV) DNA polymerase transactivated protein 1 (HBVDNAPTP1) is a novel protein transactivated by HBV DNA polymerase, screened by suppression subtractive hybridization technique (GenBank accession no: AY450389). The biological function of HBVDNAPTP1 was investigated in this study.Methods: We constructed a vector pcDNA3.1 (-) /myc-His A-HBVDNAPTP1 and used it to transfect acute monocytic leukemia cell line THP-1. HBVDNAPTP1 expression was detected by western blot analysis in the cells. A cDNA library of genes transactivated by HBVDNAPTP1 in THP-1 cells was made in pGEM-T Easy using suppression subtractive hybridization (SSH). The cDNAs were sequenced and analyzed with BLAST search against the sequences in GenBank.Results: Some sequences, such as CIP4, might be involved in apoptosis development. mRNA and protein expression of CIP4 was identified by Real time RT-PCR and western blot in THP-1 cells. HBVDNAPTP1 could down-regulate the expression of CIP4 at both transcription and translation levels.Conclusion: HBVDNAPTP1 may be involved in the positive regulation on the initiation of monocyte apoptosis. The result contribute to reveal the HBVDNAPTP1 biological functions and provide new evidences for further exploration of the regulatory mechanism of HBVDNAPTP1.