1,720,981 research outputs found
Thymic Sirpα^<+> DC subset conducts the novel process of intrathymic immune tolerance
Get PDF機能的に正常な免疫システムを維持するうえで、T細胞を中心とした自己の正常免疫組織・細胞による、非自己である病原性微生物やがん細胞の識別過程を理解することが必要不可欠である。本研究では、免疫学的役割が明らかではない胸腺樹状細胞サブセット(Sirpα^樹状細胞)に着目し、詳細な解析を行った。その結果、胸腺内Sirpα+樹状細胞による、血液中のタンパク抗原を標的とした新規の免疫寛容誘導経路を同定した。また、この経路を介して、分泌性の腫瘍抗原に対して抗腫瘍免疫寛容が誘導されることも明らかにした。The discrimination of self or non-self antigens is essential for the maintenance of intact immune system. In this study, we demonstrated that a thymic dendritic cell (DC) subset, Sirpα+ DC is the major conductor of the novel process of intrathymic immune tolerance against blood-borne antigens. Moreover, the secretory tumor-specific antigens can induce the intrathymic anti-tumor immune tolerance through the antigen presentation by thymic Sirpα+ DCs.研究課題/領域番号:23790532, 研究期間(年度):2011-2012出典：研究課題「胸腺Sirpα^樹状細胞による自己免疫寛容の新規誘導メカニズムの解明」課題番号23790532
（KAKEN：科学研究費助成事業データベース（国立情報学研究所））
（https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-23790532/23790532seika/）を加工して作成金沢大学がん進展制御研究所research repor
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Patheophysiological interaction with normal bone marrow cells during the development of chronic myeloid leukemia
Get PDF慢性骨髄性白血病（CML）の発症最初期段階においては、その主要病巣である骨髄内において、大多数が正常の造血細胞によって占められている中に、ごく少数出現した白血病細胞が徐々に増加すると考えられる。本研究を通して、正常造血系を背景に白血病細胞が増殖し、正常造血細胞との相互作用を詳細に観察できるCMLマウスモデルを新たに確立した。さらに、このモデルを用いた解析から、発症初期過程の骨髄内において、白血病細胞から高レベルに産生される炎症性ケモカインCCL3が、選択的に正常造血幹・前駆細胞の増殖を抑制することで、白血病細胞の優位な増殖を支持する結果、CML病態を増悪させていることを明らかにした。In the initiation process of chronic myeloid leukemia (CML), a small number of transformed leukemia cells coexist with a large number of normal hematopoietic cells, gradually increasing thereafter and eventually predominating in the bone marrow space. In this study, we newly established a mouse CML model, in which we can precisely observe the expansion of leukemia cells under the normal hematopoietic system. By using this CML model, we herein demonstrated that leukemia cells produce high levels of an inflammatory chemokine, CCL3, in the BM to selectively inhibit the proliferation of normal hematopoietic stem/progenitor cells. CCL3 eventually facilitates the dominant proliferation of leukemia cells, thereby contributing to CML progression.研究課題/領域番号:25460492, 研究期間(年度):2013-04-01 – 2016-03-31出典：研究課題「慢性骨髄性白血病発症における正常骨髄細胞との相互作用機構の解明」課題番号25460492
（KAKEN：科学研究費助成事業データベース（国立情報学研究所））
（https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-25460492/25460492seika/）を加工して作成金沢大学がん進展制御研究所research repor
The cytotoxic mechanism and immunological role of CD4+CD8+ macrophages
Get PDFラット脾臓内CD4+CD8+マクロファージを用いて、数種類の腫瘍細胞に対する細胞傷害活性を検討し、またそのメカニズムを解析したところ、NK細胞と同様に、活性型NKレセプター(NKRP2)を介して腫瘍細胞表面上のRAET1分子を認識し、granzymeやperforinなどの細胞傷害因子を分泌することで、抗腫瘍細胞傷害活性を示すことが明らかとなった。研究課題/領域番号:19890081, 研究期間(年度):2007-2008出典：「CD4+CD8+マクロファージの抗腫瘍メカニズムと免疫学的役割に関する研究」研究成果報告書 課題番号19890081
（KAKEN：科学研究費助成事業データベース（国立情報学研究所））
（https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-19890081/19890081seika/)を加工して作成research repor
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Research of biological function and distinctive role of Sirp・^+ dendritic cells in central tolerance
Get PDF本研究では、Sirp・^・胸腺樹状細胞(tDC)サブセットの分化誘導、胸腺内局在、機能的特徴について解析を行なった結果、Sirp・^tDCは、ケモカインレセプターであるCCR2を介したシグナルにより、胸腺内への動員、局在性が制御されており、胸腺皮質領域や傍血管領域(PVR)に散在性に分布していることを明らかにした。さらにその特徴的な局在性から、血液中のタンパクを選択的に取り込み、未熟T前駆細胞に対して、抗原を提示することで、制御性T細胞への分化を誘導することを明らかにした。In this study, we investigated the mechanism of differentiation, intrathymic localization, and distinctive function of Sirp・^tDCs in central tolerance. Our observation revealed that Sirp・^ tDCs were disseminated in the thymic cortical area, with some of them uniquely localized inside PVRs. Moreover, Sirp・^ cDC subset can selectively capture blood-borne antigens under the multi-step guidance of CCR2-mediated signals. Furthermore, they can present blood-borne antigens to the majority of immature thymocytes to induce antigen-specific Treg generation.研究課題/領域番号:21790464, 研究期間(年度):2009-2010出典：研究課題「胸腺Sirp・^+樹状細胞の機能的特徴と自己免疫寛容における役割の解明」課題番号21790464
（KAKEN：科学研究費助成事業データベース（国立情報学研究所））
（https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-21790464/21790464seika/）を加工して作成金沢大学がん進展制御研究所research repor
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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