1
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Sasaki Y, Ichikawa S, Sakurai K, Nakamura H, Inokura K, Onodera K, Fukuhara N, Onishi Y, Yokoyama H, Harigae H. [Multiple myeloma with IgH::MYC and multiple extramedullary lesions]. Rinsho Ketsueki 2024; 65:147-152. [PMID: 38569857 DOI: 10.11406/rinketsu.65.147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
A 41-year-old woman with right shoulder pain was found to have multiple tumors with osteolysis and M-proteinemia. Abnormal plasma cells (CD38+, CD138+, Igλ≫κ) were detected in 1.4% of bone marrow nucleated cells, and G-banding analysis revealed a 46,XX,t (8;14), (q24;q32) karyotype in 4 of 20 cells analyzed. A biopsy specimen from an extramedullary lesion had a packed proliferation of aberrant plasmacytoid cells with positive IgH::MYC fusion signals on fluorescence in situ hybridization. The patient was diagnosed with symptomatic multiple myeloma and treated with the BLd regimen, which significantly reduced M protein levels. Extramedullary lesions were initially reduced, but increased again after four cycles. The lesions disappeared with subsequent EPOCH chemotherapy and radiation, and complete remission was confirmed. The patient was then treated with high-dose chemotherapy with autologous peripheral blood stem cell transplantation. Complete remission was maintained for over one year with lenalidomide maintenance therapy. A solitary IgH::MYC chromosomal translocation is extremely rare in multiple myeloma and may be associated with high tumor proliferative capacity, multiple extramedullary lesions, and poor prognosis. Combined therapeutic modalities with novel and conventional chemotherapy and radiation might be a promising treatment strategy for patients with this type of multiple myeloma.
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Affiliation(s)
| | | | | | | | - Kyoko Inokura
- Department of Hematology, Tohoku University Hospital
| | | | | | | | | | - Hideo Harigae
- Department of Hematology, Tohoku University Hospital
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2
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Uchibori Y, Onodera K, Onishi Y, Komatsu H, Takenaka K, Narumi Y, Watanabe T, Nakamura H, Sakurai K, Hashimoto K, Inokura K, Ichikawa S, Fukuhara N, Yokoyama H, Harigae H. Umbilical Cord Blood Transplantation for Myelodysplastic Syndromes with Donor-Specific Anti-HLA Antibodies against HLA-DP. TOHOKU J EXP MED 2023; 261:123-127. [PMID: 37558420 DOI: 10.1620/tjem.2023.j063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
The presence of donor-specific anti-human leukocyte antigen (HLA) antibodies (DSAs) against anti-HLA-A, -B, -C, and -DRB1 in HLA-mismatched hematopoietic stem cell transplantation (HSCT) is associated with graft failure. DSAs against HLA-A, -B, -C, and -DRB1 with a mean fluorescence intensity (MFI) of greater than > 1,000 was shown to increase the risk of graft failure in single-unit umbilical cord blood transplantation (UCBT). Nevertheless, the impact of DSAs against HLA-DP or -DQ on transplantation outcomes is not fully understood. In this report, we present a case of UCBT in a patient with myelodysplastic syndrome who was positive for DSAs against HLA-DP with MFI of 1,263 before UCBT but successfully achieved neutrophil engraftment. If HLA-DP or -DQ is mismatched in UCBT, evaluating DSAs against HLA-DP or -DQ is crucial to avoid graft failure. However, the criteria for DSAs against HLA-A, -B, -C, and -DRB1 may not be directly applicable to those against HLA-DP or -DQ.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Kyoko Inokura
- Department of Hematology, Tohoku University Hospital
| | | | | | | | - Hideo Harigae
- Department of Hematology, Tohoku University Hospital
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3
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Ichimura H, Ichikawa S, Ono K, Inokura K, Hoshi Y, Shirai T, Fukuhara N, Yokoyama H, Fujii H, Harigae H. Severe Bone Marrow Aplasia Following Macrophage Activation Syndrome in Systemic Lupus Erythematosus. TOHOKU J EXP MED 2023; 260:301-304. [PMID: 37164698 DOI: 10.1620/tjem.2023.j037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Macrophage activation syndrome (MAS) is a potentially fatal complication of rheumatic diseases, characterized by activated macrophages with hemophagocytosis and multiple organ damage. We report a case of MAS associated with systemic lupus erythematosus that initially presented with severe liver dysfunction. Although it was improved with steroids and plasmapheresis, severe pancytopenia was subsequently experienced, and the bone marrow showed severe aplasia similar to aplastic anemia. Nevertheless, the administration of immunosuppressants resulted in the recovery of blood counts within two weeks. When severe MAS results in cytokine overproduction, bone marrow aplasia may occur, for which immunosuppressive therapy may be highly effective.
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Affiliation(s)
| | | | - Koya Ono
- Department of Hematology, Tohoku University Hospital
| | - Kyoko Inokura
- Department of Hematology, Tohoku University Hospital
| | - Yosuke Hoshi
- Department of Rheumatology, Tohoku University Hospital
| | | | | | | | - Hiroshi Fujii
- Department of Rheumatology, Tohoku University Hospital
| | - Hideo Harigae
- Department of Hematology, Tohoku University Hospital
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4
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Watanabe H, Fujishima F, Inokura K, Makino R, Daikoku K, Sasaki R, Ichinohasama R, Sato H, Joh K, Sasano H. Rapidly progressive glomerulonephritis in a patient with angioimmunoblastic T-cell lymphoma: a rare autopsy case showing IgA vasculitis and cylinder-like deposits. Med Mol Morphol 2022; 55:267-273. [PMID: 35657412 DOI: 10.1007/s00795-022-00325-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 05/11/2022] [Indexed: 10/18/2022]
Abstract
Angioimmunoblastic T-cell lymphoma (AITL), a hematological malignancy, originates from follicular helper T cells. The primary site of AITL is the lymph nodes, but extranodal presentation is frequent in patients with advanced stages. Here, we report a rare case of a patient with AITL presenting with rapidly progressive glomerulonephritis (RPGN). The patient underwent computed tomography, which showed systemic lymph node swelling. RPGN was noted at the time of admission. Livedo was observed in the lower limbs with purpura on the foot. The patient was diagnosed with AITL based on lymph node biopsy. Skin biopsy revealed vasculitis with immunoglobulin A (IgA) deposits. Renal biopsy revealed endocapillary proliferative glomerulonephritis with massive subendothelial deposits and intraluminal thrombi. Immunofluorescence showed IgA, IgG, and complement component 3c-predominant granular staining pattern in the capillary and mesangial areas. Electron micrographs demonstrated dense cylindrical-like deposits in the subendothelial space. Chemotherapy drugs were administered, but the patient's respiratory distress increased until death. Upon autopsy, membranoproliferative glomerulonephritis and extensive necrotizing cellular crescent formation were observed in the glomeruli. Taken together, this case is a rare combination of AITL and RPGN showing both cylinder-like deposits suggestive of cryoglobulinemic glomerulonephritis (CN) and IgA vasculitis.
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Affiliation(s)
- Hirofumi Watanabe
- Department of Pathology, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan.
| | - Fumiyoshi Fujishima
- Department of Pathology, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Kyoko Inokura
- Department of Hematology and Rheumatology, Tohoku University Graduate School, Miyagi, Japan
| | - Rui Makino
- Division of Nephrology, Endocrinology, and Vascular Medicine, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Kensuke Daikoku
- Division of Nephrology, Endocrinology, and Vascular Medicine, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Rui Sasaki
- Department of Dermatology, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Ryo Ichinohasama
- Department of Hematopathology, Tohoku University Hospital, Miyagi, Japan
| | - Hiroshi Sato
- Division of Nephrology, Endocrinology, and Vascular Medicine, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Kensuke Joh
- Department of Pathology, The Jikei University School of Medicine, Tokyo, Japan
| | - Hironobu Sasano
- Department of Pathology, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
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5
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Ichikawa S, Fukuhara N, Doman T, Kiba D, Tanaka Y, Inokura K, Morota N, Ono K, Onodera K, Onishi Y, Yokoyama H, Ichinohasama R, Harigae H. Aleukemic T-lymphoblastic leukemia/lymphoma with massive cerebrospinal fluid infiltration. J Hematop 2022. [DOI: 10.1007/s12308-022-00495-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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6
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Ichikawa S, Inokura K, Kawamura Y, Fukuhara N, Yokoyama H, Ouchi K, Fujishima F, Harigae H. Massive bone marrow infiltration of neuroendocrine carcinoma mimicking aggressive hematological malignancy. J Hematop 2021. [DOI: 10.1007/s12308-021-00475-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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7
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Ichikawa S, Fujiwara T, Saito K, Sakurai K, Inokura K, Fukuhara N, Yokoyama H, Onodera K, Onishi Y, Kameoka J, Harigae H. Salvage Cord Blood Transplantation for Sustained Remission of Acute Megakaryoblastic Leukemia That Relapsed Early after Myeloablative Transplantation. Intern Med 2021; 60:3015-3019. [PMID: 33814495 PMCID: PMC8502674 DOI: 10.2169/internalmedicine.6796-20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Acute megakaryoblastic leukemia (AMKL) is a rare subtype of acute myeloid leukemia accompanied by an aggressive clinical course and dismal prognosis. We herein report a case of AMKL preceded by mediastinal germ cell tumor that relapsed early after allogeneic hematopoietic stem cell transplantation with myeloablative conditioning but was successfully treated using salvage cord blood transplantation (CBT) with reduced-intensity conditioning. Although several serious complications developed, sustained remission with a favorable general condition was ultimately achieved. Although an optimal therapeutic strategy remains to be established, the graft-versus-leukemia effect of CBT may be promising, even for the treatment of refractory AMKL.
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Affiliation(s)
| | - Tohru Fujiwara
- Department of Hematology, Tohoku University Hospital, Japan
| | - Kei Saito
- Department of Hematology, Tohoku University Hospital, Japan
| | - Kazuki Sakurai
- Department of Hematology, Tohoku University Hospital, Japan
| | - Kyoko Inokura
- Department of Hematology, Tohoku University Hospital, Japan
| | | | | | - Koichi Onodera
- Department of Hematology, Tohoku University Hospital, Japan
| | - Yasushi Onishi
- Department of Hematology, Tohoku University Hospital, Japan
| | - Junichi Kameoka
- Department of Hematology and Rheumatology, Tohoku Medical and Pharmaceutical University Hospital, Japan
| | - Hideo Harigae
- Department of Hematology, Tohoku University Hospital, Japan
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8
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Yanagiya R, Ito S, Yamada A, Aizawa K, Shiono Y, Inokura K, Toubai T, Kato Y, Honda K, Ishizawa K. [Immune-mediated neuropathy with anti-ganglioside antibodies in diffuse large B-cell lymphoma]. Rinsho Ketsueki 2019; 60:761-766. [PMID: 31391363 DOI: 10.11406/rinketsu.60.761] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A 70-year-old man having a mass lesion on his right lower abdomen for 2 months was admitted to our hospital for diagnosis. Upon admission, the patient experienced bilateral upper and lower limb weakness, which aggravated. He underwent nerve conduction study and was diagnosed with axonal neuropathy. Diagnosis of diffuse large B-cell lymphoma (DLBCL) was accomplished via biopsy of the mass lesion, with positive laboratory tests for anti-ganglioside antibodies. Based on these results, immune-mediated DLBCL-induced polyneuropathy was suspected, and chemotherapy (R-CHOP) was immediately started. Limb weakness improved and completely resolved. After six courses of R-CHOP, no evidence of DLBCL was observed on PET/CT (i.e., complete metabolic remission). The patient lived without DLBCL relapse or neurological symptoms after remission. Only few reports regarding immune-mediated polyneuropathy induced by malignant lymphoma are available in the literature, which, together with this case, suggest that prompt control of malignant lymphoma is crucial for favorable prognosis of neuropathy.
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Affiliation(s)
- Ryo Yanagiya
- Department of Hematology, Neurology, Endocrinology, Metabolism and Diabetology, Faculty of Medicine, University of Yamagata
| | - Satoshi Ito
- Department of Hematology, Neurology, Endocrinology, Metabolism and Diabetology, Faculty of Medicine, University of Yamagata
| | - Akane Yamada
- Department of Hematology, Neurology, Endocrinology, Metabolism and Diabetology, Faculty of Medicine, University of Yamagata
| | - Keiko Aizawa
- Department of Hematology, Neurology, Endocrinology, Metabolism and Diabetology, Faculty of Medicine, University of Yamagata
| | - Yosuke Shiono
- Department of Hematology, Neurology, Endocrinology, Metabolism and Diabetology, Faculty of Medicine, University of Yamagata
| | - Kyoko Inokura
- Department of Hematology, Neurology, Endocrinology, Metabolism and Diabetology, Faculty of Medicine, University of Yamagata
| | - Tomomi Toubai
- Department of Hematology, Neurology, Endocrinology, Metabolism and Diabetology, Faculty of Medicine, University of Yamagata
| | - Yuichi Kato
- Department of Hematology, Neurology, Endocrinology, Metabolism and Diabetology, Faculty of Medicine, University of Yamagata
| | | | - Ken'ichi Ishizawa
- Department of Hematology, Neurology, Endocrinology, Metabolism and Diabetology, Faculty of Medicine, University of Yamagata
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9
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Ichikawa S, Fukuhara N, Hatta S, Himuro M, Katsushima H, Nasu K, Ono K, Inokura K, Kobayashi M, Onishi Y, Fujii H, Ishizawa K, Ichinohasama R, Harigae H. Successful Cord Blood Stem Cell Transplantation for Primary Cutaneous CD8-positive Aggressive Epidermotropic Cytotoxic T-cell Lymphoma Complicated with Cerebral Infiltration. Intern Med 2018; 57. [PMID: 29526962 PMCID: PMC6096016 DOI: 10.2169/internalmedicine.0568-17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A 16-year-old boy, who had been initially examined for bilateral blepharedema and slight eruption, presented with rapidly deteriorating symptoms in associating with headache and consciousness disturbance. He was diagnosed to have primary cutaneous CD8-positive aggressive epidermotropic cytotoxic T-cell lymphoma (PCAE-CTL) by a biopsy of the skin and brain. After whole-brain radiation and some courses of chemotherapy, cord blood transplantation was performed with myeloablative conditioning. After transplantation, the cerebral dysfunction gradually improved. Disease remission was confirmed by the disappearance of any abnormal findings on electroencephalogram and magnetic resonance imaging. PCAE-CTL is reported to be an extremely aggressive disease with a poor prognosis, but the timely performance of cord blood transplantation is considered to be a promising treatment strategy.
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Affiliation(s)
- Satoshi Ichikawa
- Department of Hematology and Rheumatology, Tohoku University Hospital, Japan
| | - Noriko Fukuhara
- Department of Hematology and Rheumatology, Tohoku University Hospital, Japan
| | - Shunsuke Hatta
- Department of Hematology and Rheumatology, Tohoku University Hospital, Japan
| | - Masahito Himuro
- Department of Hematology and Rheumatology, Tohoku University Hospital, Japan
| | | | - Kentaro Nasu
- Department of Hematology and Rheumatology, Tohoku University Hospital, Japan
| | - Koya Ono
- Department of Hematology and Rheumatology, Tohoku University Hospital, Japan
| | - Kyoko Inokura
- Department of Hematology and Cell Therapy, Yamagata University Faculty of Medicine, Japan
| | - Masahiro Kobayashi
- Department of Hematology and Rheumatology, Tohoku University Hospital, Japan
| | - Yasushi Onishi
- Department of Hematology and Rheumatology, Tohoku University Hospital, Japan
| | - Hiroshi Fujii
- Department of Hematology and Rheumatology, Tohoku University Hospital, Japan
| | - Kenichi Ishizawa
- Department of Hematology and Cell Therapy, Yamagata University Faculty of Medicine, Japan
| | - Ryo Ichinohasama
- Department of Hematopathology, Tohoku University Hospital, Japan
| | - Hideo Harigae
- Department of Hematology and Rheumatology, Tohoku University Hospital, Japan
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10
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Ohe R, Aung NY, Shiono Y, Utsunomiya A, Kabasawa T, Tamazawa N, Tamura Y, Kato T, Yamada A, Hasegawa S, Aizawa K, Inokura K, Ito S, Toubai T, Kato Y, Tsunoda T, Onami K, Suzuki T, Ishizawa K, Yamakawa M. Detection of Minimal Bone Marrow involvement of Blastic Plasmacytoid Dendritic Cell Neoplastic Cells - CD303 immunostaining as a diagnostic tool. J Clin Exp Hematop 2018; 58:1-9. [PMID: 29415975 DOI: 10.3960/jslrt.17030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Blastic plasmacytoid dendritic cell (pDC) neoplasm (BPDCN) is a relatively rare hematological malignancy with significantly complex clinicopathological features that are still unclear. This study aimed to analyze the clinicopathological data of BPDCN and evaluate immunohistochemical detection of minimal bone marrow (BM) involvement. In this study, we examined skin and BM lesions from 6 patients with BPDCN. Neoplastic cells tested positive for CD303 (polyclonal, 100%; monoclonal, 40%) in the skin lesions and for CD303 (polyclonal, 100%; monoclonal, 67%) in the BM clots. Although immunostaining of CD4, CD56, CD123, CD303, and TCLl detected minimal BM involvement in 3 patients, morphological identification was challenging in the BM clots stained with hematoxylin-eosin. In conclusion, our results demonstrate the significance of observing BM smears to detect neoplastic cells and that immunohistochemical examination, including CD303 antibodies, is useful to detect minimal BM involvement. This study is the first to report the expression of thymic stromal lymphopoietin (TSLP) and its receptor in BPDCN cells. Therefore, the TSLP/TSLP receptor axis may be associated with the proliferation of BPDCN, and consequently, the survival of patients.
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Affiliation(s)
- Rintaro Ohe
- Department of Pathological Diagnostics, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Naing Ye Aung
- Department of Pathological Diagnostics, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Yosuke Shiono
- Department of Neurology, Hematology, Metabolism, Endocrinology and Diabetology, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Aya Utsunomiya
- Department of Pathological Diagnostics, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Takanobu Kabasawa
- Department of Pathological Diagnostics, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Nobuyuki Tamazawa
- Department of Pathological Diagnostics, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Yuka Tamura
- Department of Pathological Diagnostics, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Tomoya Kato
- Department of Pathological Diagnostics, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Akane Yamada
- Department of Neurology, Hematology, Metabolism, Endocrinology and Diabetology, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Shin Hasegawa
- Department of Neurology, Hematology, Metabolism, Endocrinology and Diabetology, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Keiko Aizawa
- Department of Neurology, Hematology, Metabolism, Endocrinology and Diabetology, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Kyoko Inokura
- Department of Neurology, Hematology, Metabolism, Endocrinology and Diabetology, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Satoshi Ito
- Department of Neurology, Hematology, Metabolism, Endocrinology and Diabetology, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Tomomi Toubai
- Department of Neurology, Hematology, Metabolism, Endocrinology and Diabetology, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Yuichi Kato
- Department of Neurology, Hematology, Metabolism, Endocrinology and Diabetology, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Takahiko Tsunoda
- Department of Dermatology, Yamagata City Hospital Saiseikan, Yamagata, Japan
| | - Kosuke Onami
- Department of Dermatology, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Tamio Suzuki
- Department of Dermatology, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Kenichi Ishizawa
- Department of Hematology and Cell Therapy, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Mitsunori Yamakawa
- Department of Pathological Diagnostics, Yamagata University Faculty of Medicine, Yamagata, Japan
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11
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Inokura K, Fujiwara T, Saito K, Iino T, Hatta S, Okitsu Y, Fukuhara N, Onishi Y, Ishizawa K, Shimoda K, Harigae H. Impact of TET2 deficiency on iron metabolism in erythroblasts. Exp Hematol 2017; 49:56-67.e5. [PMID: 28167288 DOI: 10.1016/j.exphem.2017.01.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 01/13/2017] [Accepted: 01/21/2017] [Indexed: 01/14/2023]
Abstract
Sideroblastic anemia is characterized by the presence of ring sideroblasts (RSs), which are caused by iron accumulation in the mitochondria of erythroblasts and are present in both the acquired and congenital forms of the disease. However, the mechanism leading to RS formation remains elusive. Acquired sideroblastic anemia is usually observed in myelodysplastic syndrome (MDS). Because a subset of MDS harbors a somatic mutation of TET2, it may be involved in iron metabolism and/or heme biosynthesis in erythroblasts. Tet2 knockdown (Tet2trap) induced exhibited mild normocytic anemia and elevated serum ferritin levels in 4-month-old mice. Although typical RSs were not observed, increased mitochondrial ferritin (FTMT) amounts were observed in the erythroblasts of Tet2-knockdown mice. Quantitative real-time polymerase chain reaction demonstrated significant dysregulation of genes involved in iron and heme metabolism, including Hmox1, Fech, Abcb7, and Sf3b1 downregulation. After the identification of a cytosine-guanine island in the promoters of Fech, Abcb7, and Sf3b1, we evaluated DNA methylation status and found significantly higher methylation levels at the CpG sites in the erythroblasts of Tet2-knockdown mice. Furthermore, Tet2 knockdown in erythroblasts resulted in decreased heme concentration and accumulation of FTMT. Therefore, TET2 plays a role in the iron and heme metabolism in erythroblasts.
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Affiliation(s)
- Kyoko Inokura
- Department of Hematology and Rheumatology, Tohoku University Graduate School, Sendai, Japan
| | - Tohru Fujiwara
- Department of Hematology and Rheumatology, Tohoku University Graduate School, Sendai, Japan; Department of Molecular Hematology/Oncology, Tohoku University Graduate School, Sendai, Japan
| | - Kei Saito
- Department of Hematology and Rheumatology, Tohoku University Graduate School, Sendai, Japan
| | - Tatsuya Iino
- Department of Hematology and Rheumatology, Tohoku University Graduate School, Sendai, Japan
| | - Shunsuke Hatta
- Department of Hematology and Rheumatology, Tohoku University Graduate School, Sendai, Japan
| | - Yoko Okitsu
- Department of Hematology and Rheumatology, Tohoku University Graduate School, Sendai, Japan
| | - Noriko Fukuhara
- Department of Hematology and Rheumatology, Tohoku University Graduate School, Sendai, Japan
| | - Yasushi Onishi
- Department of Hematology and Rheumatology, Tohoku University Graduate School, Sendai, Japan
| | - Kenichi Ishizawa
- Department of Hematology and Cell Therapy, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Kazuya Shimoda
- Division of Gastroenterology and Hematology, Department of Internal Medicine, Faculty of Medicine, Miyazaki University, Miyazaki, Japan
| | - Hideo Harigae
- Department of Hematology and Rheumatology, Tohoku University Graduate School, Sendai, Japan; Department of Molecular Hematology/Oncology, Tohoku University Graduate School, Sendai, Japan.
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12
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Kato Y, Yamada A, Inokura K, Shiono Y, Suzuki I, Ishizawa K. Study of the efficacy and safety of G-CSF BS preparation for malignant lymphoma initial chemotherapy. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw523.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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13
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Onishi Y, Sasaki O, Ichikawa S, Inokura K, Katsuoka Y, Ohtsuka Ohba R, Okitsu Y, Kohata K, Ohguchi H, Fukuhara N, Yokoyama H, Yamada MF, Yamamoto J, Ishizawa K, Kameoka J, Harigae H. Favorable outcome of unrelated cord blood transplantation for Philadelphia chromosome-positive acute lymphoblastic leukemia. Biol Blood Marrow Transplant 2011; 17:1093-7. [PMID: 21277378 DOI: 10.1016/j.bbmt.2011.01.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Accepted: 01/14/2011] [Indexed: 10/18/2022]
Abstract
Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph(+)ALL) is one of the highest-risk ALL groups. Whenever possible, patients with Ph(+)ALL should undergo allogeneic hematopoietic stem cell transplantation (HSCT) after induction of remission. Although unrelated cord blood transplantation (CBT) has become a common treatment in adult patients who lack a sibling donor, data on the efficacy of CBT for Ph(+)ALL are limited. We analyzed the clinical outcomes of 20 Ph(+)ALL patients who underwent CBT (n = 8) or unrelated bone marrow transplantation (BMT) (n = 12). The median age was 41 years (range, 17-55 years). All but one of the patients were treated with an imatinib-based regimen before HSCT, and 19 patients were in first complete remission (CR) and 1 patient was in second CR at the time of HSCT. Seventeen patients received a myeloablative conditioning regimen containing 12 Gy of total-body irradiation, and 3 received a reduced-intensity conditioning regimen. After a median of 26 months of follow-up, estimated 3-year overall and leukemia-free survival rates were 100% and 85%, respectively, after CBT, and 49% and 38%, respectively, after unrelated BMT. The CBT group had significantly better overall survival than the BMT group (P = .02). Although BCR-ABL transcript was detected in 4 of 8 CBT patients at transplantation, 7 patients remained in molecular CR. Our findings suggest that CBT may be a viable option as postinduction therapy for Ph(+)ALL in patients lacking a sibling donor.
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Affiliation(s)
- Yasushi Onishi
- Department of Hematology and Rheumatology, Tohoku University Hospital, Sendai, Japan.
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