The aim of this study was to prepare a new formula of Leishmania major (L. major) crude antigen and evaluate its effect on immune system. For this purpose L. major promastigotes were cultured, harvested, washed, and resuspended in physiologic saline and the suspensions were dispersed in five equal batches. 0.1 ml of various doses of the cocktail antigen were injected intradermaly in three group...

DNA coding for the core antigen from hepatitis B Virus (HBcAg) was amplified, cloned and propagated in E. coli. The core protein was expressed in E. coli and the product was readily detected by Western blot. This protein can be used as a diagnostic material in serum screening tests. To increase the level of expression of this antigen in bacteria, two plasmids were constructed in which the gene ...

Abstract Self antigen-specific T cells are prevalent in the mature adaptive immune repertoire. At steady state, these regulated by various mechanisms of peripheral tolerance. Characterizing activation self during inflammation may shed crucial insights into pathogenesis autoimmunity. Utilizing an experimental animal model where mice express three cell epitopes (2W, gp66, and OVA) a tissue restri...

Using a standard microcytotoxicity (NIH) technique of tissue typing, the HLA-B27 antigen was identified in 30 out of 34 patients (HH.2%) with classical ankylosing spondylitis (AS), compared to 6 out of 70 controls (H.6%) (P < 0.005). We also found this antigen in 8 out of 76 (10.5%) patients with non-AS arthritis.