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Biomedical subjects

A Wakisaka

Publications and source records attributed to A Wakisaka.

At least 109 records · Page 6Linked to original sources
PubMed1983

Islet-cell cytoplasmic antibodies in Japanese diabetics.

Islet Cell-Cytoplasmic Antibodies (ICA) in serum samples obtained from 616 Japanese diabetics were examined. The patients included 296 subjects with insulin-dependent diabetes (IDDM) and 320 with noninsulin dependent diabetes (NIDDM). The number of ICA-positive cases found in 96 subjects in whom the duration of IDDM was under one year was found to be 50% (48/96), though in subjects with a duration over one year, it was only 14.5% (29/200). The prevalence of ICA-positive cases in the NIDDM group was 2.2% (7/320), and none of the nondiabetics had ICA in their serum. Moreover, none of 45 first-degree relatives of 19 patients with IDDM of whom 5 were positive and others were negative for ICA had ICA. Concerning the relationship between HLA-type and ICA in IDDM, there was a tendency for the prevalence of BW54, DR4 and MT3 of HLA to be higher in the ICA-negative group than in the ICA-positive group or the non-diabetic group. In 28 patients with IDDM, both ICA and ICSA were checked. Of 21 patients positive for ICA, only 3 had ICSA, although 3 out of 7 patients with negative ICA were positive for ICSA. Therefore no correlation was found between ICA and ICSA.

Adolescent↗
PubMed1982

Close association of HLA-Bw51 with Behçet's disease.

Frequency of HLA-A, B, and C antigens was studied in 184 patients with Behçet's disease to investigate the immunogenetically determined predisposition to this disease. A statistically significant increased incidence of HLA-B5 or Bw51 was noted in the patients as compared with the normal control subjects. No significant difference was observed in the distribution of other HLA antigens. On the basis of HLA studies, it seems likely that the susceptibility genes to Behçet's disease closely linked to HLA-Bw51 may have been spread by the old nomadic tribes or the Turks via the Silk Route.

Behcet Syndrome↗
PubMed1982

Association between the MB system and asthma in the Japanese.

Twenty-three unrelated Japanese patients with asthma who showed a high total serum IgE level, a strong skin test response to Dermatophagoides farinae, and a high score on a radioallergosorbent test (RAST) using Dermatophagoides farinae were typed for HLA-A locus, -B locus, and -D region antigens. No significant difference in the frequencies of HLA-A, -B, and -DR antigens were observed between the asthma patients and the healthy controls. A significant difference in the frequency of MB3', however, was found between the asthma patients and the healthy controls (corrected p = 0.04, relative risk = 18.5).

Asthma↗
PubMed1982

HLA-linked susceptibility gene of Takayasu Disease.

The HLA-A, B, DR and MB antigens were investigated in patients suffering from Takayasu disease (Aortitis syndrome). Out of twenty-one HLA-A and B antigens tested, only HLA-Bw52 was significantly deviated (30147, PF = 63.8%, RR = 7.8) from the controls (14/76, PF = 18.4%). Since in the Japanese, HLA-Bw52 is in positive linkage disequilibria with HLA-DR2 and MB1, the association of the DR2 and MB1 antigens with Takayasu disease was studied. The HLA-DR2 antigen was significantly increased (23/30, PF = 76.7%,, RR = 6.0) in patients compared with the control (18/51, PF = 35.3%). Moreover, an almost perfect association of MBI (29/30, PF = 96.7%, RR = 12.6) with Takayasu disease was demonstrated. This finding supports the hypothesis that the genes in the HLA-D region play a major role in determining the susceptibility to Takayasu disease.

Aortic Arch Syndromes↗
PubMed1982

Human leukocyte antigen-linked genetic controls for T cell-mediated cytotoxic response to mumps virus in humans.

The involvement of human leukocyte antigen determinants for the response of mumps virus-specific cytotoxic T lymphocytes in humans was studied. The cytotoxic T lymphocytes could only lyse virus-infected allogeneic cells with which they shared a particular human leukocyte antigen, e.g., Bw52 or B7. The existence of Bw52 in the subjects who received a booster immunization with live mumps vaccine was associated with a significantly higher cytotoxic T-lymphocyte response than that of subjects without the gene. Although a donor-dependent difference in the recognition of human leukocyte antigen-A2 suggests the complexity of the genetic mechanisms involved, the results are largely consistent with the concept of major histocompatibility complex-linked genetic control of virus-specific cytotoxic T-lymphocyte response.

Cytotoxicity, Immunologic↗
PubMed1982

The role of three distinct Ia-like antigen molecules in human T cell proliferative responses: effect of monoclonal anti-Ia-like antibodies.

Murine monoclonal antibodies (MoAb) to three distinct Ia-like molecules were studied for their inhibitory effects on antigen- and alloantigen-induced T cell proliferations. The MoAb were classified into three groups according to the molecules they recognized. Both the group I MoAb reacting with DR molecules and the group III MoAb were capable of inhibiting T cell proliferative responses to PPD- and HSV-Ag-pulsed APC, autologous B-LCL, and alloantigens. On th other hand, the group II MoAb, which reacted with a determinant on the molecule carrying MB1 determinants, was only capable of inhibiting T cell responses to alloantigens. These results suggest that the structure of the molecules correlates with the functional repertoire of the human Ia-like antigens.

Antibodies, Monoclonal↗
PubMed1981

HLA and rheumatoid arthritis in the Japanese.

Sixty-three Japanese patients with rheumatoid arthritis (RA) were typed for HLA-A, -B, and -DR locus specificities. A significant association was found only with increased frequency of HLA-DR4 in the patients (71.4%) compared with controls (41.8%) (corrected P = 0.007, relative risk = 3.5). No association was found with HLA-A9 or HLA-Bw54, which are in linkage disequilibrium with HLA-DR4 in the Japanese. The association between HLA-DR4 and RA observed in these Japanese patients has also been demonstrated in the white population.

Adult↗
PubMed1981

Host factors and susceptibility to rubella virus infection: the association of HLA antigens.

To examine the role of host-dependent factors to natural rubella infection, the positive rates of HAI antibody according to HLA-A and -B antigens were studied in 93 children, aged 9 to 10, who were exposed only to a recent epidemic (single-exposure group), and in 199 adult females, aged 18 to 23, who were exposed also to a former epidemic (dual-exposure group). Furthermore, the phenotype frequencies of HLA antigens were investigated in seronegative subjects in both groups, as well as in 58 adult female vaccinees, in comparison with those of the Japanese population. The seropositive rates by the HLA antigens, 38.7% and 73.4%, respectively, in each exposure group were found in subjects having some HLA antigens. Several of these candidate HLA antigens varied in phenotype frequencies in seronegative subjects of all three groups from those of the average Japanese. Although a few types were statistically significant, no contradictory findings in susceptibility were obtained among the groups during the study, which suggested strongly that subjects with HLA-Bw51 and -Bw16 are susceptible. In addition, when the seropositive rates were compared in all combinations of HLA-A and -B antigens classified according to expected susceptibility, the positive rates were arranged in order of susceptibility with significant statistical differences in several groups.

Adult↗
PubMed1980

Association of B cell alloantigen with juvenile onset diabetes mellitus in the Japanese.

Sixty-four Japanese insulin dependent juvenile onset diabetes mellitus (JOD) were studied in relation to HLA-A, B, and DR. Significant deviations were observed. HLA-Bw54 was increased (PF = 49.2%, RR = 6.4) and HLA-B5 was decreased (PF = 7.9%, RR = 0.19). Using radioimmunoassay, two HLA-DR antigens were investigated. Hon 7 antigen, so-called MT3 (WIA4x7), which has linkage disequilibrium between HLA-BW54, is highly associated (PF = 96.9%, RR = 27.8) with JOD found in the Japanese.

Adolescent↗
PubMed1980

Antibody response following rubella immunization analyzed by HLA types.

Possible association between HLA antigens and antibody response to rubella vaccine was examined in 71 seronegative adult females, aged from 18 to 23, immunized with QEF vaccine. High responders (HAI antibody titer greater than or equal to 1:32) with HLA-B15 were significantly higher in frequency than those without HLA-B15 (p < 0.05). On the other hand, subjects with HLA-A9 had a tendency toward low immune responsiveness, including all the three non-responders. These results suggest that the antibody response to rubella vaccine may be influenced by the host-genetic factors relating to HLA antigens.

Adolescent↗
PubMed1980

Self recognition by autologous mixed lymphocyte reaction-primed cells.

Human T cells were separated with neuraminidase-treated autologous erythrocytes into auto-rosette-forming cells (ARFC) and non-ARFC (N-ARFC). These 2 subsets were examined for reactivity to autologous non-T cells. When N-ARFC were stimulated by autologous non-T cells, blastogenesis was weak; ARFC, however, proliferated vigorously. ARFC were revealed to be the major subset that responded and proliferated in autologous mixed lymphocyte reaction (AMLR). AMLR-primed cells were restimulated by autologous or allogeneic non-T cells to study self recognition in relation to HLA complex. Self recognition by AMLR-primed cells was closely related to HLA complex, and absolute identity of HLA complex was necessary to recognize allogeneic cells as self. In addition, in respect to the responder cell difference between AMLR and allogeneic MLR, the reactivity of 2 kinds of cells (i.e., AMLR-primed cells and alloreactive cells) strongly suggested that autoreactive T cells were distinguished from alloreactive T cells.

Cell Division↗
PubMed1979

A new HLA-B antigen (HOK-1) found in the Japanese.

The HLA-B8 antigen is one of the characteristic antigens associated with organ specific autoimmune diseases among Caucasians. Among the Japanese, HLA-B8 positives have been assumed to be extremely rare. By using some HLA-B8 typing sera, a new HLA-B antigen, HLA-Bw4 positive, was found in the Japanese. This new HLA-B antigen, tentatively called HOK-1, showed a phenotype frequency of 3.7% and a gene frequency of 1.9 +/- 0.6%. This antigen has a strong linkage disequilibrium with HLA-Cw1 among the Japanese.

Chromosome Mapping↗