MyD88-dependent signaling for IL-15 production plays an important role in maintenance of CD8 alpha alpha TCR alpha beta and TCR gamma delta intestinal intraepithelial lymphocytes. 2006

Qingsheng Yu, and Ce Tang, and Sun Xun, and Toshiki Yajima, and Kiyoshi Takeda, and Yasunobu Yoshikai
Division of Host Defense, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan.

Interaction between commensal bacteria and intestinal epithelial cells (i-ECs) via TLRs is important for intestinal homeostasis. In this study, we found that the numbers of CD8alphaalpha TCRalphabeta and TCRgammadelta intestinal intraepithelial lymphocytes (i-IELs) were significantly decreased in MyD88-deficient (-/-) mice. The expression of IL-15 by i-ECs was severely reduced in MyD88(-/-) mice. Introduction of IL-15 transgene into MyD88(-/-) mice (MyD88(-/-) IL-15 transgenic mice) partly restored the numbers of CD8alphaalpha TCRalphabeta and TCRgammadelta i-IELs. The i-IEL in irradiated wild-type (WT) mice transferred with MyD88(-/-) bone marrow (BM) cells had the same proportions of i-IEL as WT mice, whereas those in irradiated MyD88(-/-) mice transferred with WT BM cells showed significantly reduced proportions of CD8alphaalpha TCRalphabeta and TCRgammadelta i-IELs, as was similar to the proportions found in MyD88(-/-) mice. However, irradiated MyD88(-/-) IL-15 transgenic mice transferred with WT BM cells had increased numbers of CD8alphaalpha TCRalphabeta and TCRgammadelta subsets in the i-IEL. These results suggest that parenchymal cells such as i-ECs contribute to the maintenance of CD8alphaalpha TCRalphabeta and gammadelta i-IELs at least partly via MyD88-dependent IL-15 production.

UI MeSH Term Description Entries
D007413 Intestinal Mucosa Lining of the INTESTINES, consisting of an inner EPITHELIUM, a middle LAMINA PROPRIA, and an outer MUSCULARIS MUCOSAE. In the SMALL INTESTINE, the mucosa is characterized by a series of folds and abundance of absorptive cells (ENTEROCYTES) with MICROVILLI. Intestinal Epithelium,Intestinal Glands,Epithelium, Intestinal,Gland, Intestinal,Glands, Intestinal,Intestinal Gland,Mucosa, Intestinal
D008231 Lymphopenia Reduction in the number of lymphocytes. Lymphocytopenia,Lymphocytopenias,Lymphopenias
D008810 Mice, Inbred C57BL One of the first INBRED MOUSE STRAINS to be sequenced. This strain is commonly used as genetic background for transgenic mouse models. Refractory to many tumors, this strain is also preferred model for studying role of genetic variations in development of diseases. Mice, C57BL,Mouse, C57BL,Mouse, Inbred C57BL,C57BL Mice,C57BL Mice, Inbred,C57BL Mouse,C57BL Mouse, Inbred,Inbred C57BL Mice,Inbred C57BL Mouse
D008822 Mice, Transgenic Laboratory mice that have been produced from a genetically manipulated EGG or EMBRYO, MAMMALIAN. Transgenic Mice,Founder Mice, Transgenic,Mouse, Founder, Transgenic,Mouse, Transgenic,Mice, Transgenic Founder,Transgenic Founder Mice,Transgenic Mouse
D011828 Radiation Chimera An organism whose body contains cell populations of different genotypes as a result of the TRANSPLANTATION of donor cells after sufficient ionizing radiation to destroy the mature recipient's cells which would otherwise reject the donor cells. Chimera, Radiation,Chimeras, Radiation,Radiation Chimeras
D002478 Cells, Cultured Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others. Cultured Cells,Cell, Cultured,Cultured Cell
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D015398 Signal Transduction The intracellular transfer of information (biological activation/inhibition) through a signal pathway. In each signal transduction system, an activation/inhibition signal from a biologically active molecule (hormone, neurotransmitter) is mediated via the coupling of a receptor/enzyme to a second messenger system or to an ion channel. Signal transduction plays an important role in activating cellular functions, cell differentiation, and cell proliferation. Examples of signal transduction systems are the GAMMA-AMINOBUTYRIC ACID-postsynaptic receptor-calcium ion channel system, the receptor-mediated T-cell activation pathway, and the receptor-mediated activation of phospholipases. Those coupled to membrane depolarization or intracellular release of calcium include the receptor-mediated activation of cytotoxic functions in granulocytes and the synaptic potentiation of protein kinase activation. Some signal transduction pathways may be part of larger signal transduction pathways; for example, protein kinase activation is part of the platelet activation signal pathway. Cell Signaling,Receptor-Mediated Signal Transduction,Signal Pathways,Receptor Mediated Signal Transduction,Signal Transduction Pathways,Signal Transduction Systems,Pathway, Signal,Pathway, Signal Transduction,Pathways, Signal,Pathways, Signal Transduction,Receptor-Mediated Signal Transductions,Signal Pathway,Signal Transduction Pathway,Signal Transduction System,Signal Transduction, Receptor-Mediated,Signal Transductions,Signal Transductions, Receptor-Mediated,System, Signal Transduction,Systems, Signal Transduction,Transduction, Signal,Transductions, Signal
D016026 Bone Marrow Transplantation The transference of BONE MARROW from one human or animal to another for a variety of purposes including HEMATOPOIETIC STEM CELL TRANSPLANTATION or MESENCHYMAL STEM CELL TRANSPLANTATION. Bone Marrow Cell Transplantation,Grafting, Bone Marrow,Transplantation, Bone Marrow,Transplantation, Bone Marrow Cell,Bone Marrow Grafting
D016692 Receptors, Antigen, T-Cell, gamma-delta T-cell receptors composed of CD3-associated gamma and delta polypeptide chains and expressed primarily in CD4-/CD8- T-cells. The receptors appear to be preferentially located in epithelial sites and probably play a role in the recognition of bacterial antigens. The T-cell receptor gamma/delta chains are separate and not related to the gamma and delta chains which are subunits of CD3 (see ANTIGENS, CD3). Antigen Receptors, T-Cell, gamma-delta,T-Cell Receptors delta-Chain,T-Cell Receptors gamma-Chain,T-Cell Receptors, gamma-delta,TcR gamma-delta,Antigen T Cell Receptor, delta Chain,Antigen T Cell Receptor, gamma Chain,Receptors, Antigen, T Cell, gamma delta,T Cell Receptors, gamma delta,T-Cell Receptor delta-Chain,T-Cell Receptor gamma-Chain,T-Cell Receptor, gamma-delta,T Cell Receptor delta Chain,T Cell Receptor gamma Chain,T Cell Receptor, gamma delta,T Cell Receptors delta Chain,T Cell Receptors gamma Chain,TcR gamma delta,delta-Chain, T-Cell Receptor,delta-Chain, T-Cell Receptors,gamma-Chain, T-Cell Receptor,gamma-Chain, T-Cell Receptors,gamma-delta T-Cell Receptor,gamma-delta T-Cell Receptors,gamma-delta, TcR

Related Publications

Qingsheng Yu, and Ce Tang, and Sun Xun, and Toshiki Yajima, and Kiyoshi Takeda, and Yasunobu Yoshikai
May 1995, Journal of immunology (Baltimore, Md. : 1950),
Qingsheng Yu, and Ce Tang, and Sun Xun, and Toshiki Yajima, and Kiyoshi Takeda, and Yasunobu Yoshikai
January 1995, Advances in experimental medicine and biology,
Qingsheng Yu, and Ce Tang, and Sun Xun, and Toshiki Yajima, and Kiyoshi Takeda, and Yasunobu Yoshikai
September 1996, Immunology,
Qingsheng Yu, and Ce Tang, and Sun Xun, and Toshiki Yajima, and Kiyoshi Takeda, and Yasunobu Yoshikai
February 1999, Journal of immunology (Baltimore, Md. : 1950),
Qingsheng Yu, and Ce Tang, and Sun Xun, and Toshiki Yajima, and Kiyoshi Takeda, and Yasunobu Yoshikai
January 2016, Mediators of inflammation,
Qingsheng Yu, and Ce Tang, and Sun Xun, and Toshiki Yajima, and Kiyoshi Takeda, and Yasunobu Yoshikai
December 2000, Journal of immunology (Baltimore, Md. : 1950),
Qingsheng Yu, and Ce Tang, and Sun Xun, and Toshiki Yajima, and Kiyoshi Takeda, and Yasunobu Yoshikai
December 1991, Journal of immunology (Baltimore, Md. : 1950),
Qingsheng Yu, and Ce Tang, and Sun Xun, and Toshiki Yajima, and Kiyoshi Takeda, and Yasunobu Yoshikai
January 1991, Current topics in microbiology and immunology,
Qingsheng Yu, and Ce Tang, and Sun Xun, and Toshiki Yajima, and Kiyoshi Takeda, and Yasunobu Yoshikai
December 1990, Immunology,
Copied contents to your clipboard!