Study on optimization of anti-CCR4 antibody therapy for patients with HTLV-1-associated myelopathy
Project/Area Number |
19K07983
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 52020:Neurology-related
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Research Institution | St. Marianna University School of Medicine |
Principal Investigator |
Sato Tomoo 聖マリアンナ医科大学, 医学研究科, 准教授 (30387063)
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Project Period (FY) |
2019-04-01 – 2022-03-31
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Project Status |
Completed (Fiscal Year 2021)
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Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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Keywords | HTLV-1 / HTLV-1関連脊髄症 / 抗CCR4抗体療法 / HAM |
Outline of Research at the Start |
HAMは未だ機能予後不良な神経難病である。最近、研究代表者らはHAM患者に対する抗CCR4抗体療法が、HTLV-1感染細胞を破壊しプロウイルス量を下げることで、脊髄炎症及び臨床症状の改善をもたらすことを示した。一方で、プロウイルス量の低下が不十分な例や有効であっても副作用の皮疹を認める例が存在する等の問題点もわかってきた。そこで本研究は①抗CCR4抗体に対する低応答性のメカニズム解明、②抗CCR4抗体療法の治療効果予測マーカーと副作用発現予測マーカーの探索・同定、③抗CCR4抗体によるプロウイルス量のセットポイント低下のメカニズム解明を通じてHAM患者に対する抗CCR4抗体療法の最適化を目指す。
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Outline of Final Research Achievements |
HTLV-1-associated myelopathy (HAM) is a neurological intractable disease caused by HTLV-1-infected cells. Corticosteroids have limited therapeutic efficacy in this disease. Recently, we demonstrated that anti-CCR4 antibody therapy for patients with HAM may improve spinal cord inflammation and clinical symptoms by destroying HTLV-1-infected cells, but in some cases the reduction of infected cells was insufficient. In this study, we found two major phenomena as to why anti-CCR4 antibodies fail to adequately destroy infected cells: one is the presence of neutralizing antibodies against CCR4, and the other is an increase in the number of infected cells that do not express CCR4.
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Academic Significance and Societal Importance of the Research Achievements |
HTLV-1関連脊髄症(HAM)は、うまく歩けない、尿が出にくい、足がしびれるといった症状が出現し、徐々に進行する希少難病である。その原因は、HTLV-1というウイルスに感染した細胞を排除しようとする免疫の反応が脊髄の中で持続し、脊髄の神経組織がやられ、脳から出る信号をうまく伝えられなくなるためと考えられている。したがってHTLV-1に感染した細胞を排除できる薬の登場が望まれていて、最近、抗CCR4抗体が見出されたが、うまく効果を発揮できない場合があった。本研究では、感染細胞がこの抗CCR4抗体の攻撃から逃れる2つの現象を突き止めた。
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Report
(4 results)
Research Products
(42 results)
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[Journal Article] Health-related quality of life evaluation using the Short Form-36 in patients with human T-cell leukemia virus type 1-associated myelopathy.2022
Author(s)
Kimura M, Yamauchi J, Sato T, Yagishita N, Araya N, Aratani S, Tanabe K, Horibe E, Watanabe T, Coler-Reilly A, Nagasaka M, Akasu Y, Kaburagi K, Kikuchi T, Shibata S, Matsumoto H, Koseki A, Inoue S, Takata A, Yamano Y.
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Journal Title
Front Med
Volume: in press
Related Report
Peer Reviewed
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[Journal Article] Efficacy of corticosteroid therapy for HTLV-1-associated myelopathy: A randomized controlled trial (HAMLET-P).2022
Author(s)
Yamauchi J, Tanabe K, Sato T, Nakagawa M, Matsuura E, Tsuboi Y, Tamaki K, Sakima H, Ishihara S, Ohta Y, Matsumoto N, Kono K, Yagishita N, Araya N, Takahashi K, Kunitomo Y, Nagasaka M, Coler-Reilly ALG, Hasegawa Y, Araujo A, Jacobson S, Grassi MFR, Galvao-Castro B, Bland M, Taylor GP, Martin F, Yamano Y.
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Journal Title
Viruses
Volume: in press
Issue: 1
Pages: 136-136
DOI
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Peer Reviewed
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[Journal Article] Mortality and risk of progression to adult T-cell leukemia/lymphoma in HTLV-1-associated myelopathy/tropical spastic paraparesis.2020
Author(s)
Nagasaka M, Yamagishi M, Yagishita N, Araya N, Kobayashi S, Makiyama J, Kubokawa M, Yamauchi J, Hasegawa D, Coler-Reilly ALG, Tsutsumi S, Uemura Y, Arai A, Takata A, Inoue E, Hasegawa Y, Watanabe T, Suzuki Y, Uchimaru K, Sato T, Yamano Y.
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Journal Title
Proc Natl Acad Sci U S A
Volume: 117(21)
Issue: 21
Pages: 11685-11691
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] The Risk Factors for Death within 6 Months After Ischemic Stroke in Patients with Cancer.2020
Author(s)
Tsuchihashi Y, Shimizu T, Akiyama H, Hagiwara Y, Soga K, Takao N, Uchino K, Yanagisawa T, Yamauchi J, Sato T, Hasegawa Y, Yamano Y.
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Journal Title
J Stroke Cerebrovasc Dis
Volume: 29(12)
Issue: 12
Pages: 105365-105365
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Creation and validation of a bladder dysfunction symptom score for HTLV-1-associated myelopathy/tropical spastic paraparesis.2020
Author(s)
Yamakawa N, Yagishita N, Matsuo T, Yamauchi J, Ueno T, Inoue E, Takata A, Nagasaka M, Araya N, Hasegawa D, Coler-Reilly A, Tsutsumi S, Sato T, Araujo A, Casseb J, Gotuzzo E, Jacobson S, Martin F, Puccioni-Sohler M, Taylor GP, Yamano Y; Japan Clinical Research Group on HAM/TSP.
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Journal Title
Orphanet J Rare Dis
Volume: 15(1)
Issue: 1
Pages: 175-175
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] The Nature of the HTLV-1 Provirus in Naturally Infected Individuals Analyzed by the Viral DNA-Capture-Seq Approach2019
Author(s)
Katsuya H, Islam S, Tan, Ito J, Miyazato P, Matsuo, Inada Y, Iwase, Uchiyama Yoshikazu、Hata Hiroyuki、Sato T, Yagishita N, Araya N, Ueno T, Nosaka K, Tokunaga M, Yamagishi M, Watanabe T, Uchimaru K, Fujisawa J-i, Utsunomiya A, Yamano Y, Satou Y
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Journal Title
Cell Reports
Volume: 29
Issue: 3
Pages: 724-735
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Cerebrospinal Fluid CXCL10 as a Candidate Surrogate Marker for HTLV-1-Associated Myelopathy/Tropical Spastic Paraparesis.2019
Author(s)
Tamaki K, Sato T, Tsugawa J, Fujioka S, Yagishita N, Araya N, Yamauchi J, Coler-Reilly A, Nagasaka M, Hasegawa Y, Yamano Y, Tsuboi Y.
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Journal Title
Front Microbiol
Volume: 10
Pages: 2110-2110
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Presentation] リアルワールドデータにより示されたHAMの排尿障害に対するミラベグロンの有用性.2021
Author(s)
飯島直樹, 山内淳司, 髙梨世子, 太刀川慶史, 八木下尚子, 新谷奈津美, 荒谷聡子, 田辺健一郎, 佐藤知雄, 高田礼子, 山野嘉久.
Organizer
第7回日本HTLV-1学会学術集会
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