PMID- 19515798 OWN - NLM STAT- MEDLINE DCOM- 20090909 LR - 20181201 IS - 1460-2377 (Electronic) IS - 0953-8178 (Linking) VI - 21 IP - 7 DP - 2009 Jul TI - The analysis of the functions of human B and T cells in humanized NOD/shi-scid/gammac(null) (NOG) mice (hu-HSC NOG mice). PG - 843-58 LID - 10.1093/intimm/dxp050 [doi] AB - 'Humanized mice' are anticipated to be a valuable tool for studying the human immune system, but the reconstituted human immune cells have not yet been well characterized. Here, we extensively investigated the differentiation and functions of human B and T cells in a supra-immunodeficient mouse strain, NOD/shi-scid/gammac(null) (NOG) reconstituted with CD34(+) hematopoietic stem cells obtained from umbilical cord blood. In these hu-HSC NOG mice, the development of human B cells was partially blocked, and a significant number of B-cell progenitors accumulated in the spleen. The mature CD19(+)IgM(+)IgD(+) human B cells of the hu-HSC NOG mice could produce IgG in vivo and in vitro by antigenic stimulation. In contrast, although human T cells with an apparently normal phenotype developed, most of them could neither proliferate nor produce IL-2 in response to antigenic stimulation by anti-CD3 and anti-CD28 antibodies in vitro. The positive selection of human T cells in the thymus was sufficiently functional, if not complete, and mainly mediated by mouse class II, suggesting that the human T cells lost their function in the periphery. We found that multiple mechanisms were involved in the T-cell abnormalities. Collectively, our results demonstrate that further improvements are necessary before humanized mice with a functional human immune system are achieved. FAU - Watanabe, Yohei AU - Watanabe Y AD - Department of Microbiology and Immunology, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai, Japan. FAU - Takahashi, Takeshi AU - Takahashi T FAU - Okajima, Akira AU - Okajima A FAU - Shiokawa, Miho AU - Shiokawa M FAU - Ishii, Naoto AU - Ishii N FAU - Katano, Ikumi AU - Katano I FAU - Ito, Ryoji AU - Ito R FAU - Ito, Mamoru AU - Ito M FAU - Minegishi, Masayoshi AU - Minegishi M FAU - Minegishi, Naoko AU - Minegishi N FAU - Tsuchiya, Shigeru AU - Tsuchiya S FAU - Sugamura, Kazuo AU - Sugamura K LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20090610 PL - England TA - Int Immunol JT - International immunology JID - 8916182 RN - 0 (Antibodies) RN - 0 (Antigens, CD34) RN - 0 (CD28 Antigens) RN - 0 (CD3 Complex) RN - 0 (CD40 Antigens) RN - 0 (Carrier Proteins) RN - 0 (Immunoglobulin G) RN - 0 (Interleukin-2) RN - 0 (Interleukins) RN - 148294-77-3 (noggin protein) RN - MKM3CA6LT1 (interleukin-21) SB - IM MH - Adoptive Transfer MH - Animals MH - Antibodies/immunology MH - Antigens, CD34/immunology MH - B-Lymphocytes/drug effects/*immunology MH - CD28 Antigens/immunology/metabolism MH - CD3 Complex/immunology/metabolism MH - CD40 Antigens/immunology/metabolism MH - Carrier Proteins/genetics/*immunology/metabolism MH - Cell Differentiation/immunology MH - Fetal Blood/immunology MH - Hematopoietic Stem Cells/drug effects/*immunology/metabolism MH - Humans MH - Immunoglobulin G/biosynthesis/immunology MH - Interleukin-2/pharmacology MH - Interleukins/pharmacology MH - Lymphocyte Activation/immunology MH - Mice MH - Mice, Inbred NOD MH - Mice, Knockout MH - Mice, SCID MH - Precursor Cells, B-Lymphoid/drug effects/*immunology MH - Spleen/drug effects/immunology/metabolism MH - T-Lymphocytes/drug effects/*immunology EDAT- 2009/06/12 09:00 MHDA- 2009/09/10 06:00 CRDT- 2009/06/12 09:00 PHST- 2009/06/12 09:00 [entrez] PHST- 2009/06/12 09:00 [pubmed] PHST- 2009/09/10 06:00 [medline] AID - dxp050 [pii] AID - 10.1093/intimm/dxp050 [doi] PST - ppublish SO - Int Immunol. 2009 Jul;21(7):843-58. doi: 10.1093/intimm/dxp050. Epub 2009 Jun 10.