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1,022 results on '"Kiyono, H."'

5. Immunoregulatory functions for murine intraepithelial lymphocytes: gamma/delta T cell receptor-positive (TCR+) T cells abrogate oral tolerance, while alpha/beta TCR+ T cells provide B cell help.

Author

Fujihashi, K, Taguchi, T, Aicher, WK, McGhee, JR, Bluestone, JA, Eldridge, JH, and Kiyono, H

Subjects
Emerging Infectious Diseases, Vaccine Related, Aetiology, Underpinning research, 1.1 Normal biological development and functioning, 2.1 Biological and endogenous factors, Inflammatory and immune system, Animals, Antibody Formation, Antigens, Surface, B-Lymphocytes, Cell Adhesion, Digestive System, Epithelial Cells, Interleukin-5, Intestinal Mucosa, Lectins, Lymphocytes, Mice, Mice, Inbred C3H, Phenotype, Plant Lectins, Receptors, Antigen, T-Cell, alpha-beta, Receptors, Antigen, T-Cell, gamma-delta, T-Lymphocyte Subsets, T-Lymphocytes, T-Lymphocytes, Helper-Inducer, Medical and Health Sciences, Immunology
Abstract

Past work has shown that a subset of effector T cells with unique characteristics could abrogate hapten- or antigen-induced tolerance, and the reconstitution of this immune response has been termed contrasuppression. We have studied contrasuppression in a model of oral tolerance (OT) in which adoptively transferred antigen-specific T contrasuppressor (Tcs) cells reverse OT and result in antibody responses to the eliciting antigen. In the present study, we show that murine intraepithelial lymphocytes (IELs) from mice orally immunized with sheep red blood cells (SRBC) contain T cells that exhibit Tcs cell activity. This effect was mediated by CD3+ gamma/delta T cell receptor-positive (TCR+), but not alpha/beta TCR+ T cells, and gamma/delta TCR+ Tcs cells were associated with both the CD4-,CD8+ and CD4-,CD8- (double-negative) IEL fractions. The CD4-,CD8+ gamma/delta TCR+ IELs were further separated into Vicia villosa-adherent and -nonadherent fractions. Adoptive transfer of V. villosa-adherent gamma/delta TCR+ T cells to mice with OT to SRBC resulted in splenic IgA, IgM, and IgG subclass anti-SRBC responses, while V. villosa-nonadherent gamma/delta TCR+ T cells were without activity. The gamma/delta TCR+ IELs did not support in vitro antibody responses in B cell cultures, while alpha/beta TCR+ IELs were effective T helper cells. Further, cytokine production by the gamma/delta TCR+ IELs was examined, and the gamma/delta TCR+ V. villosa-adherent fraction, which possessed contrasuppressor function, contained low levels of IL-5 mRNA and small numbers of IL-5-producing cells when compared with alpha/beta TCR+ IELs and V. villosa-nonadherent gamma/delta TCR+ IELs. Our results now show that mouse IELs contain two distinct types of T cells that function in the immune response, e.g., alpha/beta TCR+ T cells that produce IL-5 and function as helper cells, and gamma/delta TCR+ T cells that restore antibody responses in mice that had been orally tolerized with antigen.

Published
1992

11. Mucosal immunoregulation by CD4+ (L3T4+) T cells

Author

Bruce, M G, Taguchi, T, Beagley, K W, Aicher, W, Kiyono, H, McGhee, J R, MacDonald, Thomas T, editor, Challacombe, Stephen J, editor, Bland, Paul W, editor, Stokes, Christopher R, editor, Heatley, Richard V, editor, and Mowat, Allan Mcl, editor

Published
1990
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13. Th1 and Th2 cells in mucosal associated tissues

Author

Taguchi, T, McGhee, J R, Coffman, R L, Beagley, K W, Eldridge, J H, Takatsu, K, Kiyono, H, MacDonald, Thomas T, editor, Challacombe, Stephen J, editor, Bland, Paul W, editor, Stokes, Christopher R, editor, Heatley, Richard V, editor, and Mowat, Allan Mcl, editor

Published
1990
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14. Role for interleukins 5 and 6 in IgA synthesis

Author

Beagley, K W, Eldridge, J H, Aicher, W, Hirano, T, Kishimoto, T, Lee, F, Kiyono, H, McGhee, J R, MacDonald, Thomas T, editor, Challacombe, Stephen J, editor, Bland, Paul W, editor, Stokes, Christopher R, editor, Heatley, Richard V, editor, and Mowat, Allan Mcl, editor

Published
1990
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18. Enhanced GMR ratio of dual spin valve with monolayer pinned structure

Author

Shimazawa, K., Tsuchiya, Y., Inage, K., Sawada, Y., Tanaka, K., Machita, T., Takahashi, N., Shimizu, T., Antoku, Y., Kiyono, H., Terunuma, K., and Kobayashi, A.

Subjects
Anisotropy -- Analysis, Monomolecular films -- Magnetic properties, Magnetic devices -- Structure, Magnetic devices -- Research, Business, Electronics, Electronics and electrical industries
Abstract

A new type of dual spin valve (DSV) structure with enhanced giant magnetoresistance (GMR) ratio is proposed, and the performance is characterized by the prototype read heads. The bottom part of DSV is kept as a synthetic pinned structure and only the top part adopts a monolayer pinned structure. The top monolayer pin DSV (TM-DSV) showed three percentage points higher GMR ratio and 20% higher [DELTA]R value. After the mechanical lapping process, the monolayer pinned layer can be stabilized by not only sense current but also large stress induced anisotropy due to Villari effect. After the quantitative analysis, the induced stress is measured to be about 4.2 x [10.sup.9] N/[m.sup.2]. The bias point was tuned by adjustment of Cu spacer layer thickness using the RKKY interaction between pinned layer and free layer. There is no reliability concern related to the monolayer pinned structure. In a perpendicular magnetic recording system, TM-DSV technology could successfully demonstrate the output of 35.5 mV/[micro]m and ~170 Gbits/[in.sup.2] density feasibility. Index Terms--DSV, monolayer pin, RKKY interaction, stress induced anisotropy, synthetic pin, Villari effect.

Published
2006

23. Development of antigen induced colitis in SCID mice reconstituted with spleen derived memory type [CD4.sup.+] [CD45RB.sup.+] T cells. (Inflammation and Inflammatory Bowel Disease)

Author

Kweon, M-N, Takahashi, I., Yamamoto, M., Jang, M.H., Suenobu, N., and Kiyono, H.

Subjects
Colitis -- Development and progression, Health, Development and progression
Abstract

Background and aims: Enteric bacterial and/or food antigens may be crucial in the development of colitis but little is known of the exact mechanism of antigen specific reactions in this [...]

Published
2002

25. Regulation of mucosal immunity in the genital tract: Balancing reproduction and protective immunity

Author

Kiyono, H., Pascual, D.W., Hickey, Danica K., Mulvey, Peter, Bryan, Emily R., Trim, Logan, Beagley, Kenneth W., Kiyono, H., Pascual, D.W., Hickey, Danica K., Mulvey, Peter, Bryan, Emily R., Trim, Logan, and Beagley, Kenneth W.

Abstract

More than 100 million new sexually transmitted infections (STIs) are acquired every day, with 357 million new infections each year caused by chlamydia, gonorrhea, syphilis, and trichomoniasis. At least 500 million people are estimated to have a genital herpes infection. Bacterial STIs are currently treatable with antibiotics, although antibiotic-resistant gonorrhea is becoming a major problem. Antivirals can be used to reduce symptoms and shedding of genital herpes but cannot cure latent infections. To date, vaccines have been developed only against human papillomavirus and hepatitis B, despite the recognition that vaccines represent the best means of halting this hidden STI epidemic. To facilitate successful reproduction, immunity in both the female and male reproductive tracts must be regulated. In females reproductive tract, immunity is regulated by sex hormones during pregnancy to allow successful implantation and growth to term of a semiallogeneic fetus. In males, sperm development begins at puberty, well after tolerance to self has developed. Therefore immune responses in the testes and epididymides must be suppressed to prevent autoimmunity against developing sperm and male infertility. These restraints on reproductive tract immune responses not only may provide opportunities for many sexually transmitted pathogens to establish chronic infections but also represent major challenges to the development of successful vaccines to target the major STIs. In this chapter, we describe how immunity in the female and male reproductive tracts is regulated to facilitate reproduction and discuss current research progress toward the development of vaccines for chlamydia and genital herpes.

Published
2020

48. Systemic Immunization for the Induction of IgA Responses

Author

Tarkowski, A., Lue, C., Moldoveanu, Z., Kiyono, H., McGhee, J. R., Prchal, J. T., Halpern, N. B., Mestecky, J., Compans, R. W., editor, Cooper, M., editor, Koprowski, H., editor, McConell, I., editor, Melchers, F., editor, Oldstone, M., editor, Olsnes, S., editor, Saedler, H., editor, Vogt, P. K., editor, Wagner, H., editor, Wilson, I., editor, Mestecky, Jiri, editor, and McGhee, Jerry R., editor

Published
1989
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