Hepatitis B Surface Antigens ; immunology ; Humans

Antigens, Neoplasm ; metabolism ; Antigens, Surface ; metabolism ; Colorectal Neoplasms ; immunology ; pathology ; Humans ; Prognosis ; Trophoblasts ; immunology

Orientia tsutsugamushi, a causative pathogen of Scrub typhus, is a gram-negative intracellular bacterium. Outer membrane vesicles (OMVs) are produced from the membrane of bacteria and play many roles related to the survival of the pathogen. However, there have been no reports confirming whether O. tsutsugamushi indeed produce OMVs. O. tsutsugamushi boryong was cultured in ECV-304 cells for the purification of OMVs. Western blot analysis and immunoenrichment using anti-O. tsutsugamushi monoclonal antibody and electron microscopy were employed for identification and characterization of OMVs. We confirm the presence of OMVs derived from O. tsutsugamushi, and also found that those OMVs contain a major surface antigen of 56-kDa protein and variant immunogenic antigens.
Antibodies, Monoclonal/*immunology ; Antigens, Bacterial/*immunology ; Antigens, Surface/*immunology ; Cell Line ; Cell Membrane/immunology ; Humans ; Microscopy, Electron ; Orientia tsutsugamushi/*immunology/metabolism ; Scrub Typhus/diagnosis/microbiology ; Secretory Vesicles/*immunology

OBJECTIVETo test anti-Sp17 antibodies in the serum of AsAb positive infertile patients, to investigate the proportion of anti-Spl7 antibodies in AsAb and their potential application to the serologic diagnosis of immune infertility and immunocontraception.

METHODSWith human recombinant Sp17 as the antigen, the ELISA method was used to detect the positive rate, antibody titre and content of anti-Sp17 antibodies in the AsAb positive serum.

RESULTSThe positive rate of anti-Sp17 antibodies in the AsAb positive serum was 56.5%, with no significant difference in the gender aspect. The percentage of anti-Sp17 antibodies in AsAb was (10.09 +/-7.45) %, with statistical significance (P <0.05).

CONCLUSIONSp17 is an important sperm antigen. Anti-Sp17 antibodies in the serum can be taken as auxiliary diagnostic index of infertility, and Sp17 is shown to be a potential candidate immunocontraception vaccine.

Adult ; Antigens, Surface ; immunology ; Autoantibodies ; blood ; Carrier Proteins ; immunology ; Contraception, Immunologic ; Female ; Humans ; Infertility, Male ; blood ; immunology ; Male ; Spermatozoa ; immunology

CD8-Positive T-Lymphocytes ; immunology ; Dendritic Cells ; immunology ; Hepatitis B ; immunology ; therapy ; Hepatitis B Surface Antigens ; immunology ; Humans

Amino Acid Sequence ; Hepatitis B Surface Antigens ; classification ; genetics ; immunology ; Hepatitis B virus ; immunology ; Mutation

Hepatitis B Surface Antigens ; blood ; immunology ; Hepatitis B, Chronic ; immunology ; Humans ; Immune System

A series of sperm membrane antigens, the important molecular markers associated with the program of spermatogenesis and maturation of sperm, which also are for attachment of the physiological mechanism of the sperm-egg interaction and fusion and the pathological changes in the infertility, were reviewed. Some traditional crucial sperm membrane proteins, such as FA-1, PH-20, fertilin, have been cloned and sequenced, and some novel gene which encode new proteins associated with the sperm membrane also have been screened out successively. All of these provided a basement for lucubration of these proteins and the research of the contraception vaccine.
Animals ; Antigens, Surface ; genetics ; immunology ; Cell Membrane ; immunology ; Cloning, Molecular ; Humans ; Male ; Mice ; Spermatozoa ; immunology ; Vaccines, Contraceptive

OBJECTIVETo analyze the characteristic of T cell response to specific antigen proteins in patients with hepatitis B virus infection.

METHODS76 cases were recruited, including four groups, acute hepatitis B (AHB), active phase of chronic hepatitis B (CHB), inactive HBV carriers (AsC) and past HBV infection. T cell responses stimulated by 3 antigen specific proteins of HBV were detected using enzyme linked immunospot (ELISPOT) assay.

RESULTS(1) There were no significant difference in frequencies to HBsAg, HBcAg and HBeAg in AHB and CHB. The frequencies to HBsAg and HBcAg in AsC were lower than that to HBeAg, and the frequencies to HBsAg in group of past HBV infection were significantly lower than that to HBcAg and HBeAg. (2) The frequencies to HBsAg in AHB and CHB both were higher than in group of past HBV infection. The frequencies to HBcAg of AHB, CHB and AsC were higher than that of group of past HBV infection. (3) There were no significant difference in magnitude to HBsAg, HBcAg and HBeAg in AHB and AsC. In CHB, the magnitude to HBsAg was lower than that to HBcAg. The magnitude of in group of past HBV infection were HBcAg > HBeAg > HBsAg. (4) In four groups, the sequence of the magnitude to HBsAg from high to low was AHB, CHB, group of past HBV infection and AsC. The magnitude to HBcAg in of AsC was lower than other three groups. As to the magnitude to HBeAg, the difference was no significant between any two groups except between AHB and CHB.

CONCLUSIONSThe T cell responses in group of AsC to HBeAg were the highest, while the T cell responses to HBcAg were the highest in group of other groups.

Hepatitis B ; immunology ; virology ; Hepatitis B Antibodies ; immunology ; Hepatitis B Core Antigens ; immunology ; Hepatitis B Surface Antigens ; immunology ; Hepatitis B e Antigens ; immunology ; Hepatitis B virus ; immunology ; isolation & purification ; Humans ; T-Lymphocytes ; immunology

OBJECTIVETo study the clinicopathologic features, diagnosis and differential diagnosis of extramedullary infiltration of acute monocytic leukemia/monoblastic sarcoma.

METHODSFive cases of extramedullary infiltration of acute monocytic leukemia/monoblastic sarcoma were selected from 102 cases of myeloid sarcoma diagnosed during the period from 1990 to 2006. The clinicopathologic findings and followup data were retrospectively analyzed. Immunohistochemical study was also carried out with SP method.

RESULTSAmong the 5 cases studied, 3 were males and 2 were females, including 2 children and 3 adults. Generalized lymphadenopathy was found in 4 patients and skin lesions were observed in 2 patients. The tumor cells in all cases were positive for CD68 (KP1), CD68 (PGM1), lysozyme and CD45. They were negative for MPO, CD15, CD163, TdT, CD117, T and B cell markers. The Ki-67 index ranged from 40% to 80%. Follow-up data were available in all the 5 patients. Four of the 5 patients died of the disease, with the average survival time being 6.25 months.

CONCLUSIONSMonoblastic sarcoma is a rare disease with poor prognosis. It is almost impossible to distinguish monoblastic sarcoma from granulocytic sarcoma and other types of small round cell tumors on the basis of morphologic examination alone. Immunohistochemistry is mandatory for a correct diagnosis.

Adult ; Antigens, CD ; immunology ; Antigens, Differentiation, Myelomonocytic ; immunology ; Child ; Diagnosis, Differential ; Female ; Humans ; Immunohistochemistry ; methods ; Immunophenotyping ; Leukemia, Monocytic, Acute ; immunology ; pathology ; Leukocyte Common Antigens ; Lewis X Antigen ; immunology ; Male ; Receptors, Cell Surface ; immunology ; Sarcoma ; immunology ; pathology ; Sarcoma, Myeloid ; immunology ; pathology