Induction of Strong and Specific Humoral and T-helper 1 Cellular Responses by HBsAg Entrapped in the Methanobrevibacter smithii Archaeosomes

BACKGROUND

Application of adjuvants with microbial origins is a recently highlighted approach in the vaccinology trials. Archaeosomes are among these microbial compounds with both adjuvant and liposomal activities and features.

METHODS

In the present study, recombinant HBsAg encapsulated into Methanobrevibacter smithii (M. smithii) archaeosomes. Balb/c mice immunized with this compound and humoral and cytokine secretion pattern of immunized models analyzed.

RESULTS

Frequency of IFN-γ secreting cells in the HBsAg-containing archaeosomes group was significantly higher than HBsAg and HBsAg(+)C/IFA groups (p≤0.05). IgG2a titer in the sera of HBsAg-containing archaeosomes group was also significantly higher than this subclass titer in the other groups (p≤ 0.05).

CONCLUSION

Analysis of induced responses revealed the immunopotentiating characteristics of M. smithii archaeosomes in the induction of T-helper 1 responses according to the dominance of IgG2a subtype and IFN-γ secreting splenocytes of immunized mice.

Gadolinium-deferasirox-D-glucosamine: novel anti-tumor and MR molecular (theranostic) imaging agent

TARGET AND PURPOSE: Cancer and heart disease are hard maladies in human communities. To recognize these kinds of diseases in primary states can help for remission and decreasing the expenses. One of the best techniques for recognizing is imaging of the tissue.

METHODS

The main reason of this study is to survey the design of molecules Gd3+ -Defrasirox-DG as a type of glucose labeled with gadolinium to capture more specific cancer tissue and heart by MRI instrument as a technique extremely accurate and sensitive not too costly and lack of radioactive half-life compared with radioactive 18FDG as competing compound.

RESULT

In this research, glucose is combined with Deferasirox for making complexes with gadolinium. With replacing the new compound of advanced imaging technology, it transferred from nuclear medicine to Radiology and the results were evaluated in vitro and in vivo that indicated the success in imaging of the heart and cancer in animal tumor model.

CONCLUSION

The mechanism of cancer cells death is through activation of TNF-α system. At present, due to the lack of radiation and radioactive half-life and low production cost and high access to MRI compared with PET, this compound can be considered as 18FDG opponent in the near future as the new MRI successor agent.