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Mizui T, Inagaki A, Nakamura Y, Imura T, Uematsu SS, Miyagi S, Kamei T, Unno M, Watanabe K, Goto M. A Recombinant Peptide Device Combined with Adipose Tissue-Derived Stem Cells Enhances Subcutaneous Islet Engraftment. Cells 2024; 13:499. [PMID: 38534342 DOI: 10.3390/cells13060499] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 02/28/2024] [Accepted: 03/10/2024] [Indexed: 03/28/2024] Open
Abstract
Subcutaneous space has been considered an attractive site for islet graft transplantation; however, the oxygen tension and vascularization are insufficient for islet graft survival. We investigated whether subcutaneous pre-implantation of a recombinant peptide (RCP) device with adipose tissue-derived stem cells (ADSCs) enhanced subcutaneous islet engraftment. RCP devices with/without syngeneic ADSCs were pre-implanted into the subcutaneous space of C57BL/6 mice. Syngeneic islets (300 or 120 islet equivalents (IEQs)) were transplanted into the pre-treated space after diabetes induction using streptozotocin. The cure rates of groups in which RCP devices were implanted four weeks before transplantation were significantly better than the intraportal transplantation group when 300 IEQs of islets were transplanted (p < 0.01). The blood glucose changes in the RCP+ADSCs-4w group was significantly ameliorated in comparison to the RCP-4w group when 120 IEQs of islets were transplanted (p < 0.01). Immunohistochemical analyses showed the collagen III expression in the islet capsule of the RCP+ADSCs-4w group was significantly enhanced in comparison to the RCP-4w and RCP+ADSCs-d10 groups (p < 0.01, p < 0.01). In addition, the number of von Willebrand factor-positive vessels within islets in the RCP+ADSCs-4w group was significantly higher than the RCP-4w group. These results suggest that using ADSCs in combination with an RCP device could enhance the restoration of the extracellular matrices, induce more efficient prevascularization within islets, and improve the graft function.
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Affiliation(s)
- Takahiro Mizui
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai 980-0872, Japan
- Department of Hepatobiliary and Pancreatic Surgery, National Cancer Center Hospital, Tokyo 104-0045, Japan
| | - Akiko Inagaki
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Yasuhiro Nakamura
- Division of Pathology, Graduate School of Medicine, Tohoku Medical and Pharmaceutical University, Sendai 983-8536, Japan
| | - Takehiro Imura
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Satomi Suzuki Uematsu
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai 980-0872, Japan
| | - Shigehito Miyagi
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai 980-0872, Japan
| | - Takashi Kamei
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai 980-0872, Japan
| | - Michiaki Unno
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai 980-0872, Japan
| | - Kimiko Watanabe
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Masafumi Goto
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai 980-0872, Japan
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
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Koyama J, Yamashita S, Kato Y, Nezu K, Goto T, Fujii S, Suzuki Y, Nakayashiki A, Kawasaki Y, Kawamorita N, Okita H, Ito T, Kushida Y, Goto M, Dezawa M, Tominaga T, Niizuma K, Ito A. Intravenously engrafted human multilineage-differentiating stress-enduring (Muse) cells rescue erectile function after rat cavernous nerve injury. BJU Int 2024; 133:332-340. [PMID: 37983592 DOI: 10.1111/bju.16232] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
OBJECTIVE To evaluate the effect of intravenous administration of human multilineage-differentiating stress-enduring (Muse) cells on rat postoperative erectile dysfunction (ED) with cavernous nerve (CN) injury without an immunosuppressant. MATERIALS AND METHODS Male Sprague-Dawley rats were randomised into three groups after CN crush injury. Either human-Muse cells, non-Muse mesenchymal stem cells (MSCs) (both 1.0 × 105 cells), or vehicle was infused intravenously at 3 h after CN injury without immunosuppressant. Erectile function was assessed by measuring intracavernous pressure (ICP) and arterial pressure (AP) during pelvic nerve electrostimulation 28 days after surgery. At 48 h and 28 days after intravenous infusion of Muse cells, the homing of Muse cells and non-Muse MSCs was evaluated in the major pelvic ganglion (MPG) after CN injury. In addition, expressions of C-X-C motif chemokine ligand (Cxcl12) and glial cell line-derived neurotrophic factor (Gdnf) in the MPG were examined by real-time polymerase chain reaction. Statistical analyses and comparisons among groups were performed using one-way analysis of variance followed by the Tukey test for parametric data and Kruskal-Wallis test followed by the Dunn-Bonferroni test for non-parametric data. RESULTS The mean (SEM) ICP/AP values at 28 days were 0.51 (0.02) in the Muse cell group, 0.37 (0.03) in the non-Muse MSC group, and 0.36 (0.04) in the vehicle group, showing a significant positive response in the Muse cell group compared with the non-Muse and vehicle groups (P = 0.013 and P = 0.010, respectively). In the MPG, Muse cells were observed to be engrafted at 48 h and expressed Schwann cell markers S100 (~46%) and glial fibrillary acidic protein (~24%) at 28 days, while non-Muse MSCs were basically not engrafted at 48 h. Higher gene expression of Cxcl12 (P = 0.048) and Gdnf (P = 0.040) was found in the MPG of the Muse group than in the vehicle group 48 h after infusion. CONCLUSION Intravenously engrafted human Muse cells recovered rat erectile function after CN injury in a rat model possibly by upregulating Cxcl12 and Gdnf.
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Affiliation(s)
- Juntaro Koyama
- Department of Urology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shinichi Yamashita
- Department of Urology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yuya Kato
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kunihisa Nezu
- Department of Urology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Takuro Goto
- Department of Urology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shinji Fujii
- Department of Urology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yu Suzuki
- Department of Urology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Atsushi Nakayashiki
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yoshihide Kawasaki
- Department of Urology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Naoki Kawamorita
- Department of Urology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hitomi Okita
- Transplantation and Regenerative Medicine Center, Tohoku University Hospital, Sendai, Japan
| | - Takako Ito
- Transplantation and Regenerative Medicine Center, Tohoku University Hospital, Sendai, Japan
| | - Yoshihiro Kushida
- Department of Stem Cell Biology and Histology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Masafumi Goto
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Mari Dezawa
- Department of Stem Cell Biology and Histology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Teiji Tominaga
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kuniyasu Niizuma
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, Sendai, Japan
- Research Division of Muse Cell Clinical Research, Tohoku University Hospital, Sendai, Japan
- Department of Neurosurgical Engineering and Translational Neuroscience, Graduate School of Biomedical Engineering, Tohoku University Graduate School of Medicine, Sendai, Japan
- Department of Neurosurgical Engineering and Translational Neuroscience, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Akihiro Ito
- Department of Urology, Tohoku University Graduate School of Medicine, Sendai, Japan
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Nashimoto Y, Konno A, Imaizumi T, Nishikawa K, Ino K, Hori T, Kaji H, Shintaku H, Goto M, Shiku H. Microfluidic vascular formation model for assessing angiogenic capacities of single islets. Biotechnol Bioeng 2024; 121:1050-1059. [PMID: 38131167 DOI: 10.1002/bit.28631] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 09/12/2023] [Accepted: 12/07/2023] [Indexed: 12/23/2023]
Abstract
Pancreatic islet transplantation presents a promising therapy for individuals suffering from type 1 diabetes. To maintain the function of transplanted islets in vivo, it is imperative to induce angiogenesis. However, the mechanisms underlying angiogenesis triggered by islets remain unclear. In this study, we introduced a microphysiological system to study the angiogenic capacity and dynamics of individual islets. The system, which features an open-top structure, uniquely facilitates the inoculation of islets and the longitudinal observation of vascular formation in in vivo like microenvironment with islet-endothelial cell communication. By leveraging our system, we discovered notable islet-islet heterogeneity in the angiogenic capacity. Transcriptomic analysis of the vascularized islets revealed that islets with high angiogenic capacity exhibited upregulation of genes related to insulin secretion and downregulation of genes related to angiogenesis and fibroblasts. In conclusion, our microfluidic approach is effective in characterizing the vascular formation of individual islets and holds great promise for elucidating the angiogenic mechanisms that enhance islet transplantation therapy.
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Affiliation(s)
- Yuji Nashimoto
- Institute of Biomaterials and Bioengineering (IBB), Tokyo Medical and Dental University (TMDU), Tokyo, Japan
- Frontier Research Institute for Interdisciplinary Sciences (FRIS), Tohoku University, Miyagi, Japan
- Graduate School of Engineering, Tohoku University, Miyagi, Japan
- Graduate School of Environmental Studies, Tohoku University, Miyagi, Japan
- Cluster for Pioneering Research, RIKEN, Saitama, Japan
| | - An Konno
- Graduate School of Environmental Studies, Tohoku University, Miyagi, Japan
| | - Takuto Imaizumi
- Graduate School of Environmental Studies, Tohoku University, Miyagi, Japan
| | | | - Kosuke Ino
- Graduate School of Engineering, Tohoku University, Miyagi, Japan
| | - Takeshi Hori
- Institute of Biomaterials and Bioengineering (IBB), Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Hirokazu Kaji
- Institute of Biomaterials and Bioengineering (IBB), Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Hirofumi Shintaku
- Cluster for Pioneering Research, RIKEN, Saitama, Japan
- Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Masafumi Goto
- Division of Transplantation and Regenerative Medicine, Graduate School of Medicine, Tohoku University, Miyagi, Japan
| | - Hitoshi Shiku
- Graduate School of Engineering, Tohoku University, Miyagi, Japan
- Graduate School of Environmental Studies, Tohoku University, Miyagi, Japan
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Saito R, Inagaki A, Nakamura Y, Imura T, Kanai N, Mitsugashira H, Endo Kumata Y, Katano T, Suzuki S, Tokodai K, Kamei T, Unno M, Watanabe K, Tabata Y, Goto M. A Gelatin Hydrogel Nonwoven Fabric Enhances Subcutaneous Islet Engraftment in Rats. Cells 2023; 13:51. [PMID: 38201255 PMCID: PMC10777905 DOI: 10.3390/cells13010051] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 12/15/2023] [Accepted: 12/20/2023] [Indexed: 01/12/2024] Open
Abstract
Although subcutaneous islet transplantation has many advantages, the subcutaneous space is poor in vessels and transplant efficiency is still low in animal models, except in mice. Subcutaneous islet transplantation using a two-step approach has been proposed, in which a favorable cavity is first prepared using various materials, followed by islet transplantation into the preformed cavity. We previously reported the efficacy of pretreatment using gelatin hydrogel nonwoven fabric (GHNF), and the length of the pretreatment period influenced the results in a mouse model. We investigated whether the preimplantation of GHNF could improve the subcutaneous islet transplantation outcomes in a rat model. GHNF sheets sandwiching a silicone spacer (GHNF group) and silicone spacers without GHNF sheets (control group) were implanted into the subcutaneous space of recipients three weeks before islet transplantation, and diabetes was induced seven days before islet transplantation. Syngeneic islets were transplanted into the space where the silicone spacer was removed. Blood glucose levels, glucose tolerance, immunohistochemistry, and neovascularization were evaluated. The GHNF group showed significantly better blood glucose changes than the control group (p < 0.01). The cure rate was significantly higher in the GHNF group (p < 0.05). The number of vWF-positive vessels was significantly higher in the GHNF group (p < 0.01), and lectin angiography showed the same tendency (p < 0.05). The expression of laminin and collagen III around the transplanted islets was also higher in the GHNF group (p < 0.01). GHNF pretreatment was effective in a rat model, and the main mechanisms might be neovascularization and compensation of the extracellular matrices.
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Affiliation(s)
- Ryusuke Saito
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai 980-0872, Japan; (R.S.)
| | - Akiko Inagaki
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Yasuhiro Nakamura
- Division of Pathology, Graduate School of Medicine, Tohoku Medical and Pharmaceutical University, Sendai 983-8536, Japan
| | - Takehiro Imura
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Norifumi Kanai
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai 980-0872, Japan; (R.S.)
| | - Hiroaki Mitsugashira
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai 980-0872, Japan; (R.S.)
| | - Yukiko Endo Kumata
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai 980-0872, Japan; (R.S.)
| | - Takumi Katano
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Shoki Suzuki
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai 980-0872, Japan; (R.S.)
| | - Kazuaki Tokodai
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai 980-0872, Japan; (R.S.)
| | - Takashi Kamei
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai 980-0872, Japan; (R.S.)
| | - Michiaki Unno
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai 980-0872, Japan; (R.S.)
| | - Kimiko Watanabe
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Yasuhiko Tabata
- Laboratory of Biomaterials, Department of Regeneration Science and Engineering, Institute for Life and Medical Sciences (LiMe), Kyoto University, Kyoto 606-8507, Japan
| | - Masafumi Goto
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai 980-0872, Japan; (R.S.)
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
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Jiang C, Saiki Y, Hirota S, Iwata K, Wang X, Ito Y, Murakami K, Imura T, Inoue J, Masamune A, Hirayama A, Goto M, Furukawa T. Ablation of Dual-Specificity Phosphatase 6 Protects against Nonalcoholic Fatty Liver Disease via Cytochrome P450 4A and Mitogen-Activated Protein Kinase. Am J Pathol 2023; 193:1988-2000. [PMID: 37741451 DOI: 10.1016/j.ajpath.2023.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 07/31/2023] [Accepted: 09/01/2023] [Indexed: 09/25/2023]
Abstract
Dual-specificity phosphatase 6 (DUSP6) is a specific phosphatase for mitogen-activated protein kinase (MAPK). This study used a high-fat diet (HFD)-induced murine nonalcoholic fatty liver disease model to investigate the role of DUSP6 in this disease. Wild-type (WT) and Dusp6-haploinsufficiency mice developed severe obesity and liver pathology consistent with nonalcoholic fatty liver disease when exposed to HFD. In contrast, Dusp6-knockout (KO) mice completely eliminated these phenotypes. Furthermore, primary hepatocytes isolated from WT mice exposed to palmitic and oleic acids exhibited abundant intracellular lipid accumulation, whereas hepatocytes from Dusp6-KO mice showed minimal lipid accumulation. Transcriptome analysis revealed significant down-regulation of genes encoding cytochrome P450 4A (CYP4A), known to promote ω-hydroxylation of fatty acids and hepatic steatosis, in Dusp6-KO hepatocytes compared with that in WT hepatocytes. Diminished CYP4A expression was observed in the liver of Dusp6-KO mice compared with WT and Dusp6-haploinsufficiency mice. Knockdown of DUSP6 in HepG2, a human liver-lineage cell line, also promoted a reduction of lipid accumulation, down-regulation of CYP4A, and up-regulation of phosphorylated/activated MAPK. Furthermore, inhibition of MAPK activity promoted lipid accumulation in DUSP6-knockdown HepG2 cells without affecting CYP4A expression, indicating that CYP4A expression is independent of MAPK activation. These findings highlight the significant role of DUSP6 in HFD-induced steatohepatitis through two distinct pathways involving CYP4A and MAPK.
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Affiliation(s)
- Can Jiang
- Department of Investigative Pathology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yuriko Saiki
- Department of Investigative Pathology, Tohoku University Graduate School of Medicine, Sendai, Japan.
| | - Shuto Hirota
- Department of Investigative Pathology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kosei Iwata
- Department of Investigative Pathology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Xinyue Wang
- Department of Investigative Pathology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yutaka Ito
- Department of Investigative Pathology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Keigo Murakami
- Department of Investigative Pathology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Takehiro Imura
- Division of Transplantation and Regenerative Medicine, Tohoku University, Sendai, Japan
| | - Jun Inoue
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Atsushi Masamune
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Akiyoshi Hirayama
- Institute for Advanced Biosciences, Keio University, Tsuruoka, Japan
| | - Masafumi Goto
- Division of Transplantation and Regenerative Medicine, Tohoku University, Sendai, Japan
| | - Toru Furukawa
- Department of Investigative Pathology, Tohoku University Graduate School of Medicine, Sendai, Japan.
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Hasegawa S, Sasaki J, Nakao H, Tomimatsu M, Yamamoto S, Watanabe S, Miyabe S, Miyachi H, Goto M. Impact of the lateral skeletal stability following bilateral sagittal split ramus osteotomy for mandibular asymmetry. JPRAS Open 2023; 38:36-47. [PMID: 37675277 PMCID: PMC10477061 DOI: 10.1016/j.jpra.2023.08.006] [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: 05/16/2023] [Accepted: 08/06/2023] [Indexed: 09/08/2023] Open
Abstract
This study evaluated the stability of bilateral sagittal split ramus osteotomy (BSSRO) associated with positional plagiocephaly and temporal and masseter muscles using posteroanterior cephalogram analysis and three-dimensional computed tomography (3D-CT). This retrospective cohort study included 31 patients who underwent BSSRO for mandibular asymmetry. The cranial vault asymmetry index (CVAI) and the cephalic index were used as indicators of positional plagiocephaly. The distance from the vertical reference line to the menton (Me) was measured on posteroanterior cephalograms immediately and 1 year after surgery, and postoperative stability was assessed. Temporal and masseter muscles were constructed from 3D-CT data and their volumes were measured. Simple regression analysis showed a significant correlation between postoperative changes in the vertical reference line to the Me and the CVAI (R = 0.56, p = 0.001), the amount of surgical movement in the vertical reference line to the Me (R = 0.41, p = 0.023), and the variable temporal muscle volume (R = 0.27, p = 0.028). There was no significant correlation between postoperative changes in the vertical reference line to the Me and the cephalic index (R = 0.093, p = 0.62) and variable masseter muscle volume (R = 0.16, p = 0.38). According to multivariate analysis, CVAI (p = 0.003) and amount of surgical movement in the vertical reference line to the Me (p = 0.014) were significant predictors of postoperative change in the vertical reference line to the Me. Positional plagiocephaly and amount of surgical movement influence lateral skeletal stability following BSSRO for mandibular asymmetry.
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Affiliation(s)
- S. Hasegawa
- Department of Maxillofacial Surgery, School of Dentistry, Aichi-Gakuin University, Aichi, Japan
| | - J. Sasaki
- Department of Maxillofacial Surgery, School of Dentistry, Aichi-Gakuin University, Aichi, Japan
| | - H. Nakao
- Department of Maxillofacial Surgery, School of Dentistry, Aichi-Gakuin University, Aichi, Japan
| | - M. Tomimatsu
- Department of Maxillofacial Surgery, School of Dentistry, Aichi-Gakuin University, Aichi, Japan
| | - S. Yamamoto
- Department of Maxillofacial Surgery, School of Dentistry, Aichi-Gakuin University, Aichi, Japan
| | - S. Watanabe
- Department of Maxillofacial Surgery, School of Dentistry, Aichi-Gakuin University, Aichi, Japan
| | - S. Miyabe
- Department of Maxillofacial Surgery, School of Dentistry, Aichi-Gakuin University, Aichi, Japan
| | - H. Miyachi
- Department of Maxillofacial Surgery, School of Dentistry, Aichi-Gakuin University, Aichi, Japan
| | - M. Goto
- Department of Maxillofacial Surgery, School of Dentistry, Aichi-Gakuin University, Aichi, Japan
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Sato K, Yokosuka K, Yoshida T, Shimazaki T, Saruwatari R, Nishida K, Matsuo A, Morito S, Fudo T, Goto M, Matsubara T, Yamada K, Shiba N. Preliminary Clinical Experience with a High-Definition Three Dimensional Exoscope for Spinal Surgery. Kurume Med J 2023; 69:47-51. [PMID: 37793885 DOI: 10.2739/kurumemedj.ms6912011] [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: 10/06/2023]
Abstract
We retrospectively evaluated spinal surgeries performed using the high-definition three-dimensional exoscopic system, which became available at our institution in August 2020. Eleven patients (4 with cervical disease and 7 with lumbar disease) underwent surgery with the system. There were no surgical complications related to the system, and the results were satisfactory. The small, flexible camera of the exoscope allows the surgeon to view the surgical field from various angles, facilitating both the approach and technique. In addition, it allows the surgeon to operate in an upright position without strain on the head and neck. Although further surgical experience is needed, this system has the potential to improve the visualization of the surgical field in spinal surgery.
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Affiliation(s)
- Kimiaki Sato
- Department of Orthopaedic Surgery, Kurume University School of Medicine
| | - Kimiaki Yokosuka
- Department of Orthopaedic Surgery, Kurume University School of Medicine
| | - Tatsuhiro Yoshida
- Department of Orthopaedic Surgery, Kurume University School of Medicine
| | | | - Rikiya Saruwatari
- Department of Orthopaedic Surgery, Kurume University School of Medicine
| | - Kota Nishida
- Department of Orthopaedic Surgery, Kurume University School of Medicine
| | - Atsushi Matsuo
- Department of Orthopaedic Surgery, Kurume University School of Medicine
| | - Shinji Morito
- Department of Orthopaedic Surgery, Kurume University School of Medicine
| | - Takuma Fudo
- Department of Orthopaedic Surgery, Kurume University School of Medicine
| | - Masafumi Goto
- Department of Orthopaedic Surgery, Kurume University School of Medicine
| | | | - Kei Yamada
- Department of Orthopaedic Surgery, Kurume University School of Medicine
| | - Naoto Shiba
- Department of Orthopaedic Surgery, Kurume University School of Medicine
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8
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Goto M, Futamura Y, Makishima H, Sakamoto N, Iijima T, Tamaki Y, Sakurai T, Sakurai H. Development of a Machine Learning Model to Evaluate Changes during Radiotherapy in Cervical Cancer Tumor Cells. Int J Radiat Oncol Biol Phys 2023; 117:e467-e468. [PMID: 37785488 DOI: 10.1016/j.ijrobp.2023.06.1671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Radiotherapy is considered the standard treatment for advanced cervical cancer. It is known that irradiation changes the morphology of tumor cells during the treatment, though its clinical significance is unknown. Recently, the usefulness of machine learning using medical images has been reported, as also as pathological images. The purpose of this study is to create a classification model for cervical tumor biopsy treated with radiotherapy, visualized on whole slide images using machine learning, in an attempt to explore the clinical significance of morphology changes during radiotherapy. MATERIALS/METHODS Cervical cancer patients who underwent radical irradiation with both pre- and mid-treatment biopsy from April 1, 2013, to December 1, 2020, were retrospectively analyzed. Tumor biopsies were Hematoxylin and eosin stained and digitized to whole slide images (WSIs). WSI s were divided into tiles of 224 × 224 pixels and converted into feature vectors using a pre-trained convolutional neural network (densenet121). A training and test dataset were divided 1:1 on a patient basis, and the model was trained to classify "pre-treatment" and "mid-treatment", and its accuracy was evaluated. The probability obtained from the classification model was defined as the radiation change index (RCI), and its color map was projected on the WSI for visualization. Survival analysis was performed to examine the clinical significance of the RCI values. RESULTS A total of eighty-four patients were analyzed, and the median observation period was 3.2 years. 184 WSIs were obtained, and 2203407 tiles were generated. The classification model was trained using 2500 tiles for each "pre-treatment" and "mid-treatment". The accuracy of the classification model was 70.8 %, with an AUC of 0.77 for the ROC curve. The probability obtained from the classification model was defined as RCI, with 0 being "pre-treatment" and 1 being "mid-treatment", and the mean RCI of "pre-treatment" and "mid-treatment" were 0.38 and 0.61, respectively. When the RCIs were visualized with a color map, the areas considered to be "pre-treatment" were consistent with a viable tumor component, and the areas considered to be "mid-treatment" were consistent with fibrosis supposed to cause by irradiation. To evaluate the clinical significance of RCI, we divide the clinical cohort into two groups with a threshold mean RCI of 0.4 in the pre-treatment biopsy. The disease-free survival was 91 months and 47 months in the RCI<0.4 and RCI≥0.4 groups, respectively. CONCLUSION We created a model to classify tissues before and during radiotherapy and successfully visualized it on slide images. The low RCI group before treatment had a better prognosis than the high RCI group, suggesting that the tumor morphologic features obtained by machine learning may be useful for prognosis prediction. Further studies are planned to develop a model that can accurately predict prognosis.
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Affiliation(s)
- M Goto
- Departement of Radiation Oncology and Proton Medical Research Center, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Y Futamura
- Department of Computer Science, University of Tsukuba, Tsukuba, Japan
| | - H Makishima
- Departement of Radiation Oncology and Proton Medical Research Center, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - N Sakamoto
- Department of Diagnostic Pathology, faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - T Iijima
- Department of Diagnostic Pathology, Ibaraki Prefectural Central Hospital, Kasama, Japan
| | - Y Tamaki
- Ibaraki Clinical Education and Training Center, University of Tsukuba Hospital, Kasama, Japan
| | - T Sakurai
- Department of Computer Science, University of Tsukuba, Tsukuba, Japan
| | - H Sakurai
- Departement of Radiation Oncology and Proton Medical Research Center, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
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9
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Goto M, Oriyama T, Kawahara K, Shibata A, Nagao T. Response to the Letter to the Editor re: "Intraosseous carcinoma of the anterior maxilla identified as the occult primary tumour of carcinoma of unknown primary". Int J Oral Maxillofac Surg 2023; 52:1016. [PMID: 36764866 DOI: 10.1016/j.ijom.2023.01.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 01/24/2023] [Indexed: 02/11/2023]
Affiliation(s)
- M Goto
- Department of Maxillofacial Surgery, School of Dentistry, Aichi Gakuin University, Chikusa-ku, Nagoya, Japan.
| | - T Oriyama
- Department of Maxillofacial Surgery, School of Dentistry, Aichi Gakuin University, Chikusa-ku, Nagoya, Japan
| | - K Kawahara
- Department of Oral and Maxillofacial Surgery, Gifu Prefectural Tajimi Hospital, Tajimi, Gifu, Japan
| | - A Shibata
- Department of Oral and Maxillofacial Surgery, Gifu Prefectural Tajimi Hospital, Tajimi, Gifu, Japan
| | - T Nagao
- Department of Maxillofacial Surgery, School of Dentistry, Aichi Gakuin University, Chikusa-ku, Nagoya, Japan
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10
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Kanai N, Inagaki A, Nakamura Y, Imura T, Mitsugashira H, Saito R, Miyagi S, Watanabe K, Kamei T, Unno M, Tabata Y, Goto M. A gelatin hydrogel nonwoven fabric improves outcomes of subcutaneous islet transplantation. Sci Rep 2023; 13:11968. [PMID: 37488155 PMCID: PMC10366205 DOI: 10.1038/s41598-023-39212-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 07/21/2023] [Indexed: 07/26/2023] Open
Abstract
Subcutaneous islet transplantation is a promising treatment for severe diabetes; however, poor engraftment hinders its prevalence. We previously reported that a recombinant peptide (RCP) enhances subcutaneous islet engraftment. However, it is impractical for clinical use because RCP must be removed when transplanting islets. We herein investigated whether a novel bioabsorbable gelatin hydrogel nonwoven fabric (GHNF) could improve subcutaneous islet engraftment. A silicon spacer with or without GHNF was implanted into the subcutaneous space of diabetic mice. Syngeneic islets were transplanted into the pretreated space or intraportally (Ipo group). Blood glucose, intraperitoneal glucose tolerance, immunohistochemistry, CT angiography and gene expression were evaluated. The cure rate and glucose tolerance of the GHNF group were significantly better than in the control and Ipo groups (p < 0.01, p < 0.05, respectively). In the GHNF group, a limited increase of vWF-positive vessels was detected in the islet capsule, whereas laminin (p < 0.05), collagen III and IV were considerably enhanced. TaqMan arrays revealed a significant upregulation of 19 target genes (including insulin-like growth factor-2) in the pretreated space. GHNF markedly improved the subcutaneous islet transplantation outcomes, likely due to ECM compensation and protection of islet function by various growth factors, rather than enhanced neovascularization.
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Affiliation(s)
- Norifumi Kanai
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, 980-0872, Japan
| | - Akiko Inagaki
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan
| | - Yasuhiro Nakamura
- Division of Pathology, Graduate School of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, 983-8536, Japan
| | - Takehiro Imura
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan
| | - Hiroaki Mitsugashira
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, 980-0872, Japan
| | - Ryusuke Saito
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, 980-0872, Japan
| | - Shigehito Miyagi
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, 980-0872, Japan
| | - Kimiko Watanabe
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan
| | - Takashi Kamei
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, 980-0872, Japan
| | - Michiaki Unno
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, 980-0872, Japan
| | - Yasuhiko Tabata
- Laboratory of Biomaterials, Department of Regeneration Science and Engineering, Institute for Life and Medical Sciences (LiMe), Kyoto University, Kyoto, 606-8507, Japan
| | - Masafumi Goto
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, 980-0872, Japan.
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan.
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11
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Kimura K, Matsuura H, Itoh C, Kawamoto Y, Oishi T, Goto M, Ogawa K, Nishitani T, Isobe M, Osakabe M. Optimization of a fast deuterium diagnostic method based on visible energetic 3He spectroscopy for high electron density plasmas. Rev Sci Instrum 2023; 94:063502. [PMID: 37862490 DOI: 10.1063/5.0110088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 05/22/2023] [Indexed: 10/22/2023]
Abstract
Fast ions play a crucial role in plasma heating, and their behavior in the plasma must be accurately understood. A diagnostics method based on charge exchange emission from the n = 4 - 3 transition (λ0 = 468.6 nm) of energetic 3He produced by the deuteron-deuteron reaction has been proposed as a for fast deuterons with energies in the order of MeV. The proposed method has the following advantages: No beam emission interferes with the spectra, the direction of the measuring line of sight, and the injection angle of the diagnostic beam can be freely determined. In previous studies, due to competing bremsstrahlung, it was expected that the proposed method will not be practical in the case of high electron density operation. This paper makes the proposed method available for measurement even at high electron densities by optimizing the measurement line of sight direction and the diagnostic beam incidence angle. This allows an electron density five times larger than the range of applications shown in previous studies. This result will contribute to measure of DT alpha in ITER.
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Affiliation(s)
- K Kimura
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
| | - H Matsuura
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
| | - C Itoh
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
| | - Y Kawamoto
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - T Oishi
- Department of Quantum Science and Energy Engineering, Tohoku University, 6-6-01-2 Aobayama, Sendai 980-8579, Japan
| | - M Goto
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, SOKENDAI, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K Ogawa
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, SOKENDAI, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - T Nishitani
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - M Isobe
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, SOKENDAI, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M Osakabe
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies, SOKENDAI, 322-6 Oroshi-cho, Toki 509-5292, Japan
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12
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Fathi I, Inagaki A, Imura T, Koraitim T, Goto M. Pancreatic Islet Transplantation into the Submandibular Gland: Our Experimental Experience and a Review of the Relevant Literature. J Clin Med 2023; 12:jcm12113735. [PMID: 37297929 DOI: 10.3390/jcm12113735] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 05/25/2023] [Accepted: 05/26/2023] [Indexed: 06/12/2023] Open
Abstract
Pancreatic islet transplantation is a promising therapy for type 1 diabetes. Islet transplantation is clinically performed through intra-portal infusion, which is associated with several drawbacks, including poor engraftment. The histological resemblance between the submandibular gland and the pancreas renders it an attractive alternative site for islet transplantation. In this study, we refined the technique of islet transplantation into the submandibular gland to achieve good morphological features. Then, we transplanted 2600 islet equivalents into the submandibular glands of diabetic Lewis rats. Intra-portal islet transplantation was performed in diabetic rats as a control. Blood glucose levels were followed for 31 days, and an intravenous glucose tolerance test was performed. Immunohistochemistry was used to demonstrate the morphology of transplanted islets. Follow-up after transplantation showed that diabetes was cured in 2/12 rats in the submandibular group in comparison to 4/6 in the control group. The intravenous glucose tolerance test results of the submandibular and intra-portal groups were comparable. Immunohistochemistry showed large islet masses in the submandibular gland in all examined specimens with positive insulin staining. Our results show that submandibular gland tissue can support the islet function and engraftment but with considerable variability. Good morphological features were achieved using our refined technique. However, islet transplantation into rat submandibular glands did not demonstrate a clear advantage over conventional intra-portal transplantation.
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Affiliation(s)
- Ibrahim Fathi
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
- Department of Surgery, Alexandria University, Alexandria 21131, Egypt
| | - Akiko Inagaki
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Takehiro Imura
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Tarek Koraitim
- Department of Surgery, Alexandria University, Alexandria 21131, Egypt
| | - Masafumi Goto
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
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13
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Takido N, Fujio A, Nishimaki H, Yamana H, Imura T, Kashiwadate T, Goto M, Unno M, Kamei T. Functional Assessment of Cardiac Arrest Hepatocytes and Effect of Mechanical Perfusion on Function in a Rat Model. Transplant Proc 2023:S0041-1345(23)00229-4. [PMID: 37100736 DOI: 10.1016/j.transproceed.2023.03.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 03/28/2023] [Indexed: 04/28/2023]
Abstract
BACKGROUND Hepatocyte transplantation has been reported to be useful for metabolic diseases and acute liver failure. However, the shortage of donors limits its widespread use. The use of livers from donors after circulatory death, which are currently unavailable for liver transplantation, may alleviate donor shortage. In this study, we investigated the effects of mechanical perfusion on cardiac arrest hepatocytes in a rat model using cardiac arrest donor livers, and we evaluated the function of cardiac arrest hepatocytes. METHODS F344 rat hepatocytes isolated from livers removed during cardiac pulsation were compared with those isolated from livers removed after 30 minutes of warm ischemia after cardiac arrest. We then compared hepatocytes isolated from livers removed after 30 minutes of warm ischemia with those isolated after 30 minutes of mechanical perfusion before isolation. The yield per liver weight, ammonia removal capacity, and adenosine diphosphate/adenosine triphosphate ratio were evaluated. RESULTS Thirty minutes of warm inhibition reduced hepatocyte yield but did not alter ammonia removal capacity and energy status. Mechanical perfusion increased hepatocyte yield and improved the adenosine diphosphate/adenosine triphosphate ratio after 30 minutes of warm inhibition. CONCLUSION Thirty minutes of warm ischemic time may decrease isolated hepatocyte yield without degrading their function. If increased yields are obtained, livers from donors dying of cardiac arrest could be used for hepatocyte transplantation. The results also suggest that mechanical perfusion may positively affect the energy status of hepatocytes.
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Affiliation(s)
- Naruhito Takido
- Department of Surgery, Graduate School of Medicine, Tohoku University, Sendai, Miyagi prefecture, Japan
| | - Atsushi Fujio
- Department of Surgery, Graduate School of Medicine, Tohoku University, Sendai, Miyagi prefecture, Japan.
| | - Hiroyasu Nishimaki
- Department of Surgery, Graduate School of Medicine, Tohoku University, Sendai, Miyagi prefecture, Japan
| | - Hiroki Yamana
- Department of Surgery, Graduate School of Medicine, Tohoku University, Sendai, Miyagi prefecture, Japan
| | - Takehiro Imura
- Division of Transplantation and Regenerative Medicine, Graduate School of Medicine, Tohoku University, Sendai, Miyagi prefecture, Japan
| | - Toshiaki Kashiwadate
- Department of Surgery, Graduate School of Medicine, Tohoku University, Sendai, Miyagi prefecture, Japan
| | - Masafumi Goto
- Division of Transplantation and Regenerative Medicine, Graduate School of Medicine, Tohoku University, Sendai, Miyagi prefecture, Japan
| | - Michiaki Unno
- Department of Surgery, Graduate School of Medicine, Tohoku University, Sendai, Miyagi prefecture, Japan
| | - Takashi Kamei
- Department of Surgery, Graduate School of Medicine, Tohoku University, Sendai, Miyagi prefecture, Japan
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14
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Akter A, Goto M, Megat Mohd Noor MJ, Parvez A, Khanam S, Bakar Siddique MA, Hossain MF, Kormoker T. Immobilization of heavy metals in tannery sludge by the formation of tobermorite in subcritical water treatment with rice husk silica. RSC Adv 2023; 13:10610-10620. [PMID: 37025665 PMCID: PMC10071302 DOI: 10.1039/d3ra00595j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 03/29/2023] [Indexed: 04/08/2023] Open
Abstract
Tannery sludge, heavy metals (HMs) enriched hazardous solid waste, is produced extensively in many regions of the world. Even though the sludge is hazardous, it can be considered a material resource, if organic matter and HMs in the sludge can be stabilized to minimize its negative environmental impacts. This research aimed to evaluate the efficacy of using subcritical water (SCW) treatment for tannery sludge treatment through immobilization and thus reduction of HMs to mitigate their potential environmental risk and toxicity. HMs in the tannery sludge were analyzed by inductively coupled plasma mass spectrometry (ICP-MS) and the average concentration of HMs (mg kg-1) was found in the following decreasing order of Cr (12 950) > Fe (1265) > Cu (76) > Mn (44) > Zn (36) > Pb (14) with very high Cr concentration. The result of toxicity characteristics leaching procedure and sequential extraction procedure tests revealed that the raw tannery sludge leachate contained 11.24 mg L-1 Cr, which classified the raw tannery sludge into a very high-risk category. After SCW treatment, the concentration of Cr in leachate was reduced to 1.6 mg L-1 indicating risk reduction to a low-risk category. The eco-toxicity levels of other HMs also decreased considerably after SCW treatment. X-ray diffractometry (XRD) and scanning electron microscopy (SEM) analysis were employed to identify the effective immobilizing substances formed in the SCW treatment process. The favorable formation of immobilizing orthorhombic tobermorite (Ca5Si6O16(OH)2·4H2O) at 240 °C in the SCW treatment process was confirmed by XRD and SEM analysis. The results confirmed that the formation of 11 Å tobermorite is capable of strongly immobilizing HMs in the SCW treatment process. Further, both orthorhombic 11 Å tobermorite and 9 Å tobermorite were successfully synthesized by SCW treatment on a mixture of tannery sludge including rice husk silica and Ca(OH)2 with water under rather mild conditions. Hence, it can be concluded that SCW treatment of tannery sludge with supplementary silica from rice husk can effectively immobilize the HMs and significantly reduce their environmental risk through tobermorite formation.
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Affiliation(s)
- Ayesha Akter
- Malaysia Japan International Institute of Technology, Universiti Teknologi Malaysia KL Campus Jalan Sultan Yahya Petra 54100 Kuala Lumpur Malaysia
- Department of Emergency Management, Faculty of Environmental Science and Disaster Management, Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh
| | - Masafumi Goto
- Malaysia Japan International Institute of Technology, Universiti Teknologi Malaysia KL Campus Jalan Sultan Yahya Petra 54100 Kuala Lumpur Malaysia
| | - Megat Johari Megat Mohd Noor
- Malaysia Japan International Institute of Technology, Universiti Teknologi Malaysia KL Campus Jalan Sultan Yahya Petra 54100 Kuala Lumpur Malaysia
| | - Ahmed Parvez
- Department of Environmental Science, Faculty of Environmental Science and Disaster Management, Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh
| | - Shamsunnahar Khanam
- Department of Environmental Science, Bangladesh University of Professionals Dhaka Bangladesh
| | - Md Abu Bakar Siddique
- Institute of National Analytical Research and Service (INARS), Bangladesh Council of Scientific and Industrial Research (BCSIR) Dhanmondi Dhaka 1205 Bangladesh
| | - Md Faysal Hossain
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology No. 130, Meilong Road Shanghai 200237 China
| | - Tapos Kormoker
- Department of Emergency Management, Faculty of Environmental Science and Disaster Management, Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh
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15
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Saito R, Inagaki A, Nakamura Y, Imura T, Kanai N, Mitsugashira H, Endo Y, Katano T, Suzuki S, Tokodai K, Kamei T, Unno M, Watanabe K, Tabata Y, Goto M. Ideal Duration of Pretreatment Using a Gelatin Hydrogel Nonwoven Fabric Prior to Subcutaneous Islet Transplantation. Cell Transplant 2023; 32:9636897231186063. [PMID: 37466120 PMCID: PMC10363859 DOI: 10.1177/09636897231186063] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 04/05/2023] [Accepted: 06/19/2023] [Indexed: 07/20/2023] Open
Abstract
Subcutaneous islet transplantation is a promising treatment for severe diabetes; however, poor engraftment hinders its prevalence. We previously revealed that a gelatin hydrogel nonwoven fabric (GHNF) markedly improved subcutaneous islet engraftment in comparison with intraportal islet transplantation. We herein investigated whether the duration of pretreatment using GHNF affected the outcome of subcutaneous islet transplantation. A silicone spacer with GHNF was implanted into the subcutaneous space of healthy mice at 2, 4, 6, or 8 weeks before transplantation, and then diabetes was induced 7 days before transplantation. Syngeneic islets were transplanted into the pretreated space. Blood glucose, intraperitoneal glucose tolerance, immunohistochemistry, inflammatory mediators, and gene expression were evaluated. The 6-week group showed significantly better blood glucose changes than the other groups (P < 0.05). The cure rate of the 6-week group (60.0%) was the highest among the groups (2-week = 0%, 4-week = 50.0%, 8-week = 15.4%). The number of von Willebrand factor (vWF)-positive vessels in the 6-week group was significantly higher than in the other groups at pre-islet and post-islet transplantation (P < 0.01 [vs 2-and 4-week groups] and P < 0.05 [vs all other groups], respectively). Notably, this beneficial effect was also observed when GHNF was implanted into diabetic mice injected with streptozotocin 7 days before GHNF implantation. The positive rates for laminin, collagen III, and collagen IV increased as the duration of pretreatment became longer and were significantly higher in the 8-week group (P < 0.01). Inflammatory mediators, including interleukin (IL)-1b, granulocyte colony-stimulating factor (G-CSF), and interferon (IFN)-γ, were gradually downregulated according to the duration of GHNF pretreatment and re-elevated in the 8-week group. Taken together, the duration of GHNF pretreatment apparently had an impact on the outcomes of subcutaneous islet transplantation, and 6 weeks appeared to be the ideal duration. Islet graft revascularization, extracellular matrix compensation of the islet capsule, and the inflammatory status at the subcutaneous space would be crucial factors for successful subcutaneous islet transplantation.
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Affiliation(s)
- Ryusuke Saito
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Akiko Inagaki
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yasuhiro Nakamura
- Division of Pathology, Graduate School of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Takehiro Imura
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Norifumi Kanai
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hiroaki Mitsugashira
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yukiko Endo
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Takumi Katano
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shoki Suzuki
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kazuaki Tokodai
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Takashi Kamei
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Michiaki Unno
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kimiko Watanabe
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yasuhiko Tabata
- Laboratory of Biomaterials, Department of Regeneration Science and Engineering, Institute for Life and Medical Sciences (LiMe), Kyoto University, Kyoto, Japan
| | - Masafumi Goto
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
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16
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Tokodai K, Goto M. [Current status and future strategy of islet transplantation in diabetic care]. Nihon Shokakibyo Gakkai Zasshi 2023; 120:980-986. [PMID: 38072461 DOI: 10.11405/nisshoshi.120.980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Affiliation(s)
| | - Masafumi Goto
- Division of Transplantation and Regenerative Medicine, Tohoku University School of Medicine
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17
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Teratani T, Kasahara N, Fujimoto Y, Sakuma Y, Miki A, Goto M, Sata N, Kitayama J. Mesenchymal Stem Cells Secretions Enhanced ATP Generation on Isolated Islets during Transplantation. Islets 2022; 14:69-81. [PMID: 35034568 PMCID: PMC8765074 DOI: 10.1080/19382014.2021.2022423] [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: 11/19/2022] Open
Abstract
The success of islet transplantation in both basic research and clinical settings has proven that cell therapy has the potential to cure diabetes. Islets intended for transplantation are inevitably subjected to damage from a number of sources, including ischemic injury during removal and delivery of the donor pancreas, enzymatic digestion during islet isolation, and reperfusion injury after transplantation in the recipient. Here, we found that protein factors secreted by porcine adipose-tissue mesenchymal stem cells (AT-MSCs) were capable of activating preserved porcine islets. A conditioned medium was prepared from the supernatant obtained by culturing porcine AT-MSCs for 2 days in serum-free medium. Islets were preserved at 4°C in University of Wisconsin solution during transportation and then incubated at 37°C in RPMI-1620 medium with fractions of various molecular weights prepared from the conditioned medium. After treatment with certain fractions of the AT-MSC secretions, the intracellular ATP levels of the activated islets had increased to over 160% of their initial values after 4 days of incubation. Our novel system may be able to restore the condition of isolated islets after transportation or preservation and may help to improve the long-term outcome of islet transplantation.Abbreviations: AT-MSC, adipose-tissue mesenchymal stem cell; Cas-3, caspase-3; DAPI, 4,6-diamidino-2-phenylindole; DTZ, dithizone; ES cell, embryonic stem cell; FITC, fluorescein isothiocyanate; IEQ, islet equivalent; INS, insulin; iPS cell, induced pluripotent stem cell; Luc-Tg rat, luciferase-transgenic rat; PCNA, proliferating cell nuclear antigen; PDX1, pancreatic and duodenal homeobox protein-1; UW, University of Wisconsin; ZO1, zona occludens 1.
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Affiliation(s)
- Takumi Teratani
- Division of Translational Research, Jichi Medical University, Tochigi, Japan
- Department of Surgery, Jichi Medical University, Tochigi, Japan
- CONTACT Takumi Teratani Division of Clinical Investigation, Jichi Medical University, 3311-1, Yakushiji, Shimotsukeshi, Tochigi329-0498, Japan
| | - Naoya Kasahara
- Department of Surgery, Jichi Medical University, Tochigi, Japan
| | | | - Yasunaru Sakuma
- Department of Surgery, Jichi Medical University, Tochigi, Japan
| | - Atsushi Miki
- Department of Surgery, Jichi Medical University, Tochigi, Japan
| | - Masafumi Goto
- New Industry Creation Hatchery Center, Tohoku University, Miyagi, Japan
| | - Naohiro Sata
- Department of Surgery, Jichi Medical University, Tochigi, Japan
| | - Joji Kitayama
- Division of Translational Research, Jichi Medical University, Tochigi, Japan
- Department of Surgery, Jichi Medical University, Tochigi, Japan
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18
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Matsuyama A, Sakamoto R, Yasuhara R, Funaba H, Uehara H, Yamada I, Kawate T, Goto M. Enhanced Material Assimilation in a Toroidal Plasma Using Mixed H_{2}+Ne Pellet Injection and Implications to ITER. Phys Rev Lett 2022; 129:255001. [PMID: 36608252 DOI: 10.1103/physrevlett.129.255001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/19/2022] [Accepted: 10/19/2022] [Indexed: 06/17/2023]
Abstract
The ablation and assimilation of cryogenic pure H_{2} and mixed H_{2}+Ne pellets, which are foreseen to be used by the ITER tokamak for mitigating thermal and electromagnetic loads of major disruptions, are observed by spatially and temporally resolved measurements. It is experimentally demonstrated that a small fraction (here ≈5%) of neon added to hydrogenic pellets enhances the core density assimilation with reduced outward transport for the low magnetic-field side injection. This is consistent with theoretical expectations that line radiation increased by doped neon in dense plasmoids suppresses the plasmoid pressure and reduces the E[over →]×B[over →] transport of the ablated material.
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Affiliation(s)
- A Matsuyama
- National Institutes for Quantum Science and Technology, Rokkasho, Aomori 039-3212, Japan
| | - R Sakamoto
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - R Yasuhara
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - H Funaba
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - H Uehara
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - I Yamada
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - T Kawate
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M Goto
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
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19
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Oriyama T, Goto M, Kawahara K, Shibata A, Nagao T. Intraosseous carcinoma of the anterior maxilla identified as the occult primary tumour of carcinoma of unknown primary. Int J Oral Maxillofac Surg 2022; 51:1510-1515. [PMID: 35346543 DOI: 10.1016/j.ijom.2022.03.005] [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] [Received: 10/08/2021] [Revised: 03/05/2022] [Accepted: 03/09/2022] [Indexed: 10/18/2022]
Abstract
Carcinoma of unknown primary (CUP) is defined as lymph node metastasis without a detectable origin until after the initial treatment has been performed. The most common occult primary site in the head and neck, as revealed by a review of the published literature, is the oropharynx. An occult primary site in the oral region is extremely rare. We report a rare case of head and neck CUP (HNCUP) in a 69-year-old female patient, wherein the occult primary lesion was a primary intraosseous carcinoma (PIOC) invading the anterior maxilla. During the course of the initial diagnostic workup, no primary lesion could be identified; however, cervical lymph node metastasis to left levels IB and IIA were observed in the patient. A neck dissection followed by adjuvant radiotherapy was performed. However, the PIOC of the anterior maxilla was identified 6 months after neck treatment and was confirmed as the occult primary tumour of the HNCUP. This case is quite rare and required a comprehensive workup to guide optimal treatment. Careful follow-up or active biopsy should be considered if osteolytic changes are observed in the jaw.
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Affiliation(s)
- T Oriyama
- Department of Maxillofacial Surgery, School of Dentistry, Aichi Gakuin University, Chikusa-ku, Nagoya, Japan
| | - M Goto
- Department of Maxillofacial Surgery, School of Dentistry, Aichi Gakuin University, Chikusa-ku, Nagoya, Japan.
| | - K Kawahara
- Department of Oral and Maxillofacial Surgery, Gifu Prefectural Tajimi Hospital, Tajimi, Gifu, Japan
| | - A Shibata
- Department of Oral and Maxillofacial Surgery, Gifu Prefectural Tajimi Hospital, Tajimi, Gifu, Japan
| | - T Nagao
- Department of Maxillofacial Surgery, School of Dentistry, Aichi Gakuin University, Chikusa-ku, Nagoya, Japan
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20
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Nakafusa Y, Nitta N, Ishii K, Shirasu N, Iwamoto T, Nemoto T, Nakamura M, Goto M, Iwata H, Taniguchi M, Yasunami Y. Acceptance of Murine Islet Allografts Without Immunosuppression in Inguinal Subcutaneous White Adipose Tissue Pretreated With bFGF. Diabetes 2022; 71:1721-1734. [PMID: 35604856 DOI: 10.2337/db21-0684] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 04/24/2022] [Indexed: 11/13/2022]
Abstract
Prevention of immune rejection without immunosuppression is the ultimate goal of transplant immunobiology. One way to achieve this in cellular transplantation, such as with islet transplantation, is to create a favorable local environment at the transplant site. In the current study, we found that C57BL/6 mice with streptozotocin-induced diabetes remained normoglycemic for >1 year after transplantation of BALB/c islets without immunosuppression when the inguinal subcutaneous white adipose tissue (ISWAT) was the site of transplantation and when the site was pretreated with basic fibroblast growth factor. Mechanistically, mesenchymal stem cells (MSCs) expanded in the ISWAT after the treatment was found to produce transforming growth factor-β (TGF-β), and prevention of islet allograft rejection could be achieved by cotransplantation with syngeneic MSCs isolated from the ISWAT after the treatment, which was abolished by anti-TGF-β antibody treatment. Importantly, TGF-β-producing cells remained present at the site of cotransplantation up to the end of observation period at 240 days after transplantation. These findings indicate that prevention of islet allograft rejection without immunosuppression is feasible with the use of syngeneic TGF-β-producing MSCs expanded in the ISWAT after the treatment with bFGF, providing a novel strategy for prevention of islet allograft rejection without immunosuppression.
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Affiliation(s)
- Yuki Nakafusa
- Research Institute for Islet Biology, Fukuoka University Central Research Organization, Fukuoka, Japan
- Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Naoyoshi Nitta
- Research Institute for Islet Biology, Fukuoka University Central Research Organization, Fukuoka, Japan
| | - Kazunari Ishii
- Department of Microbiology and Immunology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Naoto Shirasu
- Department of Biochemistry, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Takahiro Iwamoto
- Research Institute for Islet Biology, Fukuoka University Central Research Organization, Fukuoka, Japan
- Department of Pharmacology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Takayuki Nemoto
- Department of Pharmacology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Masafumi Nakamura
- Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masafumi Goto
- Division of Transplantation and Regenerative Medicine, Tohoku University School of Medicine, Sendai, Japan
| | - Hiroo Iwata
- Frontiers of Innovative Research in Science and Technology (FIRST), Konan University, Kobe, Japan
| | - Masaru Taniguchi
- RIKEN Center for Integrative Medical Sciences (IMS), Yokohama, Japan
| | - Yohichi Yasunami
- Research Institute for Islet Biology, Fukuoka University Central Research Organization, Fukuoka, Japan
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21
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Matsumura M, Imura T, Inagaki A, Ogasawara H, Miyagi S, Ohashi K, Unno M, Kamei T, Goto M. Use of Perfluorohexyloctane for Preservation of Rat Liver After Circulatory Death and a Prolonged Cold Preservation Model for Hepatocyte Transplantation. Transpl Int 2022; 35:10659. [PMID: 35865862 PMCID: PMC9294150 DOI: 10.3389/ti.2022.10659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 06/10/2022] [Indexed: 11/13/2022]
Affiliation(s)
- Muneyuki Matsumura
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Takehiro Imura
- Division of Transplantation and Regenerative Medicine, Tohoku University School of Medicine, Sendai, Japan
| | - Akiko Inagaki
- Division of Transplantation and Regenerative Medicine, Tohoku University School of Medicine, Sendai, Japan
| | - Hiroyuki Ogasawara
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shigehito Miyagi
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kazuo Ohashi
- Graduate School and School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Michiaki Unno
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Takashi Kamei
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Masafumi Goto
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
- Division of Transplantation and Regenerative Medicine, Tohoku University School of Medicine, Sendai, Japan
- *Correspondence: Masafumi Goto,
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22
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Mathews A, Terry JL, Baek SG, Hughes JW, Kuang AQ, LaBombard B, Miller MA, Stotler D, Reiter D, Zholobenko W, Goto M. Deep modeling of plasma and neutral fluctuations from gas puff turbulence imaging. Rev Sci Instrum 2022; 93:063504. [PMID: 35778003 DOI: 10.1063/5.0088216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 05/17/2022] [Indexed: 06/15/2023]
Abstract
The role of turbulence in setting boundary plasma conditions is presently a key uncertainty in projecting to fusion energy reactors. To robustly diagnose edge turbulence, we develop and demonstrate a technique to translate brightness measurements of HeI line radiation into local plasma fluctuations via a novel integrated deep learning framework that combines neutral transport physics and collisional radiative theory for the 33D - 23P transition in atomic helium with unbounded correlation constraints between the electron density and temperature. The tenets for experimental validity are reviewed, illustrating that this turbulence analysis for ionized gases is transferable to both magnetized and unmagnetized environments with arbitrary geometries. Based on fast camera data on the Alcator C-Mod tokamak, we present the first two-dimensional time-dependent experimental measurements of the turbulent electron density, electron temperature, and neutral density, revealing shadowing effects in a fusion plasma using a single spectral line.
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Affiliation(s)
- A Mathews
- MIT Plasma Science and Fusion Center, Cambridge, Massachusetts 02139, USA
| | - J L Terry
- MIT Plasma Science and Fusion Center, Cambridge, Massachusetts 02139, USA
| | - S G Baek
- MIT Plasma Science and Fusion Center, Cambridge, Massachusetts 02139, USA
| | - J W Hughes
- MIT Plasma Science and Fusion Center, Cambridge, Massachusetts 02139, USA
| | - A Q Kuang
- MIT Plasma Science and Fusion Center, Cambridge, Massachusetts 02139, USA
| | - B LaBombard
- MIT Plasma Science and Fusion Center, Cambridge, Massachusetts 02139, USA
| | - M A Miller
- MIT Plasma Science and Fusion Center, Cambridge, Massachusetts 02139, USA
| | - D Stotler
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540, USA
| | - D Reiter
- Institut für Laser- und Plasmaphysik, Heinrich-Heine-Universität, Düsseldorf, Nordrhein-Westfalen 40225, Germany
| | - W Zholobenko
- Max-Planck-Institut für Plasmaphysik, Garching, Bayern 85748, Germany
| | - M Goto
- National Institute for Fusion Science, Toki-shi, Gifu-ken 509-5292, Japan
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23
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Hirakawa T, Goto M, Takahashi K, Iwasawa T, Fujishima A, Makino K, Shirasawa H, Sato W, Sato T, Kumazawa Y, Terada Y. Na+/K+ ATPase α1 and β3 subunits are localized to the basolateral membrane of trophectoderm cells in human blastocysts. Hum Reprod 2022; 37:1423-1430. [PMID: 35640043 PMCID: PMC9247425 DOI: 10.1093/humrep/deac124] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 05/09/2022] [Indexed: 11/25/2022] Open
Abstract
STUDY QUESTION Is there a relation between specific Na+/K+ ATPase isoform expression and localization in human blastocysts and the developmental behavior of the embryo? SUMMARY ANSWER Na+/K+ ATPase α1, β1 and β3 are the main isoforms expressed in human blastocysts and no association was found between the expression level of their respective mRNAs and the rate of blastocyst expansion. WHAT IS KNOWN ALREADY In mouse embryos, Na+/K+ ATPase α1 and β1 are expressed in the basolateral membrane of trophectoderm (TE) cells and are believed to be involved in blastocoel formation (cavitation). STUDY DESIGN, SIZE, DURATION A total of 20 surplus embryos from 11 patients who underwent IVF and embryo transfer at a university hospital between 2009 and 2018 were analyzed. PARTICIPANTS/MATERIALS, SETTING, METHODS After freezing and thawing Day 5 human blastocysts, their developmental behavior was observed for 24 h using time-lapse imaging, and the expression of Na+/K+ ATPase isoforms was examined using quantitative RT-PCR (RT-qPCR). The expressed isoforms were then localized in blastocysts using fluorescent immunostaining. MAIN RESULTS AND THE ROLE OF CHANCE RT-qPCR results demonstrated the expression of Na+/K+ ATPase α1, β1 and β3 isoforms in human blastocysts. Isoforms α1 and β3 were localized to the basolateral membrane of TE cells, and β1 was localized between TE cells. A high level of β3 mRNA expression correlated with easier hatching (P = 0.0261). LARGE SCALE DATA N/A. LIMITATIONS, REASONS FOR CAUTION The expression of mRNA and the localization of proteins of interest were verified, but we have not been able to perform functional analysis. WIDER IMPLICATIONS OF THE FINDINGS Of the various Na+/K+ ATPase isoforms, expression levels of the α1, β1 and β3 mRNAs were clearly higher than other isoforms in human blastocysts. Since α1 and β3 were localized to the basolateral membrane via fluorescent immunostaining, we believe that these subunits contribute to the dilation of the blastocoel. The β1 isoform is localized between TE cells and may be involved in tight junction formation, as previously reported in mouse embryos. STUDY FUNDING/COMPETING INTEREST(S) This work was supported by the JSPS KAKENHI (https://www.jsps.go.jp/english/index.html), grant number 17K11215. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. The authors have no conflicts of interest.
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Affiliation(s)
- T Hirakawa
- Department of Obstetrics and Gynecology, Akita University Graduate School of Medicine, Akita, Japan
| | - M Goto
- Department of Obstetrics and Gynecology, Akita University Graduate School of Medicine, Akita, Japan
| | - K Takahashi
- Department of Obstetrics and Gynecology, Akita University Graduate School of Medicine, Akita, Japan
| | - T Iwasawa
- Department of Obstetrics and Gynecology, Akita University Graduate School of Medicine, Akita, Japan
| | - A Fujishima
- Department of Obstetrics and Gynecology, Akita University Graduate School of Medicine, Akita, Japan
| | - K Makino
- Department of Obstetrics and Gynecology, Akita University Graduate School of Medicine, Akita, Japan
| | - H Shirasawa
- Department of Obstetrics and Gynecology, Akita University Graduate School of Medicine, Akita, Japan
| | - W Sato
- Department of Obstetrics and Gynecology, Akita University Graduate School of Medicine, Akita, Japan
| | - T Sato
- Department of Obstetrics and Gynecology, Akita University Graduate School of Medicine, Akita, Japan
| | - Y Kumazawa
- Department of Obstetrics and Gynecology, Akita University Graduate School of Medicine, Akita, Japan
| | - Y Terada
- Department of Obstetrics and Gynecology, Akita University Graduate School of Medicine, Akita, Japan
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24
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Fathi I, Nishimura R, Imura T, Inagaki A, Kanai N, Ushiyama A, Kikuchi M, Maekawa M, Yamaguchi H, Goto M. KRP-203 Is a Desirable Immunomodulator for Islet Allotransplantation. Transplantation 2022; 106:963-972. [PMID: 34241985 PMCID: PMC9038237 DOI: 10.1097/tp.0000000000003870] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 06/04/2021] [Accepted: 06/06/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND The current standard immunosuppressive regimens, calcineurin inhibitors, have diabetogenic and anti-vascularization effects on islet grafts. KRP-203, a sphingosine-1-phosphate functional antagonist, exerts its immunomodulatory function through lymphocyte sequestration. However, the effect of this antagonist on islets is unclear. We examined the effect of KRP-203 on the islet function and vascularization and sought a calcineurin-free regimen for islet allotransplantation. METHODS KRP-203 was administered for 14 d to mice, then diabetogenic effect was evaluated by blood glucose levels and a glucose tolerance test. Static glucose stimulation, the breathing index, and insulin/DNA were examined using isolated islets. Islet neovascularization was evaluated using a multiphoton laser scanning microscope. After islet allotransplantation with either KRP-203 alone, sirolimus alone, or both in combination, the graft survival was evaluated by blood glucose levels and immunohistochemical analyses. A mixed lymphocyte reaction was also performed to investigate the immunologic characteristics of KRP-203 and sirolimus. RESULTS No significant differences in the blood glucose levels or glucose tolerance were observed between the control and KRP-203 groups. Functional assays after islet isolation were also comparable. The multiphoton laser scanning microscope showed no inhibitory effect of KRP-203 on islet neovascularization. Although allogeneic rejection was effectively inhibited by KRP-203 monotherapy (44%), combination therapy prevented rejection in most transplanted mice (83%). CONCLUSIONS KRP-203 is a desirable immunomodulator for islet transplantation because of the preservation of the endocrine function and lack of interference with islet neovascularization. The combination of KRP-203 with low-dose sirolimus may be promising as a calcineurin-free regimen for islet allotransplantation.
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Affiliation(s)
- Ibrahim Fathi
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
- Department of Surgery, University of Alexandria, Alexandria, Egypt
| | - Ryuichi Nishimura
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Takehiro Imura
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Akiko Inagaki
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Norifumi Kanai
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Akira Ushiyama
- Department of Environmental Health, National Institute of Public Health, Wako, Japan
| | - Masafumi Kikuchi
- Department of Pharmaceutical Science, Tohoku University Hospital, Sendai, Japan
| | - Masamitsu Maekawa
- Department of Pharmaceutical Science, Tohoku University Hospital, Sendai, Japan
| | - Hiroaki Yamaguchi
- Department of Pharmacy, Yamagata University Graduate School of Medical Science, Yamagata University Hospital, Yamagata, Japan
| | - Masafumi Goto
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
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25
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Kozaka S, Wakabayashi R, Kamiya N, Goto M. Lyotropic liquid crystal-based transcutaneous peptide delivery system: Evaluation of skin permeability and potential for transcutaneous vaccination. Acta Biomater 2022; 138:273-284. [PMID: 34774785 DOI: 10.1016/j.actbio.2021.11.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 10/13/2021] [Accepted: 11/05/2021] [Indexed: 12/27/2022]
Abstract
Transcutaneous drug delivery is a promising method in terms of drug repositioning and reformulation because of its non-invasive and easy-to-use features. To overcome the skin barrier, which is the biggest challenge in transcutaneous drug delivery, a number of techniques, such as microemulsion, solid-in-oil dispersions and liposomes, have been studied extensively. However, the low viscosity of these formulations limits drug retention on the skin and reduces patient acceptability. Although viscosity can be increased by adding a thickening reagent, such an addition often alters formulation nanostructures and drug solubility, and importantly, decreases skin permeability. In this study, a gel-like lyotropic liquid crystal (LLC) was used as a tool to enhance skin permeability. In particular, we prepared 1-monolinolein (ML)-based LLCs with different water contents. All LLCs significantly enhanced skin permeation of a peptide drug, an epitope peptide of melanoma, despite their high viscoelasticity. Fourier transform infra-red spectroscopic analysis of the skin surface treated with the LLCs revealed that the gyroid geometry more strongly interacted with the lamellar structure inside the stratum corneum (SC) than the diamond geometry. Finally, as the result of the in vivo tumor challenge experiment using B16F10 melanoma-bearing mice, the LLC with the gyroid geometry showed stronger vaccine effect against tumor than a subcutaneous injection. Collectively, ML-based LLCs, especially with the gyroid geometry, are a promising strategy to deliver biomacromolecules into skin. STATEMENT OF SIGNIFICANCE: Transcutaneous drug delivery is a promising method for drug repositioning and reformulation because of its non-invasive and easy-to-use features. To overcome the skin barrier, which is the biggest challenge in transcutaneous drug delivery, we used a gel-like lyotropic liquid crystal (LLC) as a novel tool to enhance skin permeability. In this paper, we demonstrated that an LLC with a specific liquid crystalline structure has the highest skin permeation enhancement effect for a peptide antigen as a model drug. Moreover, the peptide antigen-loaded LLC showed a vaccine effect that was comparable to a subcutaneous injection in vivo. This study provides a basis for designing a transcutaneous delivery system of peptide drugs with LLC.
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26
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Tanaka M, Tokodai K, Sato M, Yamada S, Okita H, Ito T, Saito M, Hoshiai T, Miyagi S, Miki T, Unno M, Kamei T, Goto M. Distribution of Amniotic Epithelial Cells After Intraportal Infusion in a Rat Model. Transplant Proc 2022; 54:513-515. [PMID: 35039159 DOI: 10.1016/j.transproceed.2021.09.077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 09/28/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Human amniotic epithelial cells (hAECs) are increasingly gaining attention as novel sources for cell transplantation. In clinical practice, intraportal infusion is considered one of the leading approaches for transplantation; however, this has not yet been validated for in vivo transplantation of hAECs. Thus, this study aims to investigate the distribution of hAECs post intraportal infusion and compare this distribution with other cell administration routes. METHODS Wistar/ST rats were divided into 4 groups (n = 3 for each) based on cell administration route: group 1, intraportal; group 2, the spleen; group 3, tail veins; and group 4, penile veins. Subsequently, hAECs (1 × 107) stained with XenoLight DiR were infused into each recipient. Cell distribution was evaluated using an in vivo imaging system. RESULTS DiR signals were detected in the rat livers of groups 1 and 2 with those in group 2 being much weaker than those in group 1. Necrosis of small intestine was observed in 2 cases in group 2. DiR signals were detected in the lungs in groups 3 and 4 because of systemic circulation; however, all the animals died within 20 minutes of infusions. CONCLUSIONS Intraportal infusion is potentially applicable for safe and efficient transplantation of hAECs into the liver, whereas hAECs administration via the spleen carries a risk of thrombosis in a narrow portal vein system. Our results also indicate that hAECs administration via the systemic circulation could cause pulmonary embolism in clinical settings.
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Affiliation(s)
- Miyako Tanaka
- Department of Surgery, Tohoku University, Sendai, Japan
| | | | - Masato Sato
- Department of Surgery, Tohoku University, Sendai, Japan
| | - Shuhei Yamada
- Department of Surgery, Tohoku University, Sendai, Japan
| | - Hitomi Okita
- Regenerative Medicine Unit of Clinical Research, Innovation and Education Center, Tohoku University Hospital, Sendai, Japan
| | - Takako Ito
- Regenerative Medicine Unit of Clinical Research, Innovation and Education Center, Tohoku University Hospital, Sendai, Japan
| | - Masatoshi Saito
- Department of Maternal and Fetal Therapeutics, Tohoku University, Sendai, Japan
| | - Tetsuro Hoshiai
- Department of Obstetrics and Gynecology, Tohoku University, Sendai, Japan
| | | | - Toshio Miki
- Department of Physiology, Nihon University, Tokyo, Japan
| | - Michiaki Unno
- Department of Surgery, Tohoku University, Sendai, Japan
| | - Takashi Kamei
- Department of Surgery, Tohoku University, Sendai, Japan
| | - Masafumi Goto
- Division of Transplantation and Regenerative Medicine, Tohoku University, Sendai, Japan
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Al-Samet MA, Goto M, Mubarak NM, Al-Muraisy SA. Evaluating the biomethane potential from the anaerobic co-digestion of palm oil mill effluent, food waste, and sewage sludge in Malaysia. Environ Sci Pollut Res Int 2021; 28:67632-67645. [PMID: 34255262 DOI: 10.1007/s11356-021-15287-2] [Citation(s) in RCA: 1] [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] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 06/30/2021] [Indexed: 06/13/2023]
Abstract
The ever-increasing organic waste generation in Malaysia is a significant contributor to greenhouse gas (GHG) emissions. However, organic wastes can be utilized to produce biogas by anaerobic digestion, which is a promising option for both energy and material recovery from organic wastes with high moisture content. Therefore, this study was formulated to investigate the feasibility of anaerobic co-digestion of three types of organic wastes generated in significantly huge quantities in Malaysia, namely palm oil mill effluent (POME), food waste (FW), and sewage sludge (SWS). The biomethane potential (BMP) test was used to evaluate the biomethane potential from these organic wastes under mesophilic conditions to establish a stable and balanced microbial community, which may lack in mono-digestion, to improve biogas production. Comparative performance was made at different food to microorganism (F/M) ratios to investigate methane production in three groups of assays, namely A, B, and C. In groups A and B, the effect of F/M ratio variation on methane production was investigated, while in group C, the effect of varying the co-substrate mixture on methane yield was examined. The findings showed that the highest methane yields achieved for mono-digestion of POME and SWS in group A were 164.44 mL-CH4/g-CODadded and 65.34 mL-CH4/g-CODadded, respectively, at an F/M ratio of 0.8 and 197.90 mL-CH4/g-CODadded for FW in group B at an F/M ratio of 0.5. In addition, the highest methane yield achieved from the anaerobic co-digestion was at 151.47 mL-CH4/g-CODadded from the co-digestion of the POME and SWS (50:50) at an F/M ratio of 1.7 in group A. Both AD and AcoD were tested to fit into two kinetic models: the modified Gompertz and the transfer function models. The results showed that the modified Gompertz model had a better fit and was more adjusted to the experimental results for both AD and AcoD. The importance of this research lies in the economics of anaerobically co-digesting these abundance feedstocks and the variations in their characteristics which were found to increase their methane yield and process efficiency in anaerobic co-digestion.
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Affiliation(s)
- Mohamed Abdulrahman Al-Samet
- Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia.
| | - Masafumi Goto
- Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia
| | - Nabisab Mujawar Mubarak
- Department of Chemical and Energy Engineering, Faculty of Engineering and Science, Curtin University, 98009, Miri, Sarawak, Malaysia.
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28
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Fathi I, Imura T, Inagaki A, Nakamura Y, Nabawi A, Goto M. Decellularized Whole-Organ Pre-vascularization: A Novel Approach for Organogenesis. Front Bioeng Biotechnol 2021; 9:756755. [PMID: 34746108 PMCID: PMC8567193 DOI: 10.3389/fbioe.2021.756755] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 10/04/2021] [Indexed: 01/15/2023] Open
Abstract
Introduction: Whole-organ decellularization is an attractive approach for three-dimensional (3D) organ engineering. However, progress with this approach is hindered by intra-vascular blood coagulation that occurs after in vivo implantation of the re-cellularized scaffold, resulting in a short-term graft survival. In this study, we explored an alternative approach for 3D organ engineering through an axial pre-vascularization approach and examined its suitability for pancreatic islet transplantation. Methods: Whole livers from male Lewis rats were decellularized through sequential arterial perfusion of detergents. The decellularized liver scaffold was implanted into Lewis rats, and an arteriovenous bundle was passed through the scaffold. At the time of implantation, fresh bone marrow preparation (BM; n = 3), adipose-derived stem cells (ADSCs; n = 4), or HBSS (n = 4) was injected into the scaffold through the portal vein. After 5 weeks, around 2,600 islet equivalents (IEQs) were injected through the portal vein of the scaffold. The recipient rats were rendered diabetic by the injection of 65 mg/kg STZ intravenously 1 week before islet transplantation and were followed up after transplantation by measuring the blood glucose and body weight for 30 days. Intravenous glucose tolerance test was performed in the cured animals, and samples were collected for immunohistochemical (IHC) analyses. Micro-computed tomography (CT) images were obtained from one rat in each group for representation. Results: Two rats in the BM group and one in the ADSC group showed normalization of blood glucose levels, while one rat from each group showed partial correction of blood glucose levels. In contrast, no rats were cured in the HBSS group. Micro-CT showed evidence of sprouting from the arteriovenous bundle inside the scaffold. IHC analyses showed insulin-positive cells in all three groups. The number of von-Willebrand factor-positive cells in the islet region was higher in the BM and ADSC groups than in the HBSS group. The number of 5-bromo-2′-deoxyuridine-positive cells was significantly lower in the BM group than in the other two groups. Conclusions: Despite the limited numbers, the study showed the promising potential of the pre-vascularized whole-organ scaffold as a novel approach for islet transplantation. Both BM- and ADSCs-seeded scaffolds were superior to the acellular scaffold.
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Affiliation(s)
- Ibrahim Fathi
- Division of Transplantation and Regenerative Medicine, Tohoku University, Sendai, Japan.,Department of Surgery, University of Alexandria, Alexandria, Egypt
| | - Takehiro Imura
- Division of Transplantation and Regenerative Medicine, Tohoku University, Sendai, Japan
| | - Akiko Inagaki
- Division of Transplantation and Regenerative Medicine, Tohoku University, Sendai, Japan
| | - Yasuhiro Nakamura
- Division of Pathology, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Ayman Nabawi
- Department of Surgery, University of Alexandria, Alexandria, Egypt
| | - Masafumi Goto
- Division of Transplantation and Regenerative Medicine, Tohoku University, Sendai, Japan.,Department of Surgery, Tohoku University, Sendai, Japan
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Usui K, Ogawa K, Goto M, Sakano Y, Shikama N, Kyogoku S, Sasai K, Daida H. Cycle-Generative Adversarial Network-Based Image Correction of 4-Dimensional Cone-Beam Computed Tomography for Lung Cancer Adaptive Radiation Therapy. Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.560] [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: 11/15/2022]
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30
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Ogasawara H, Inagaki A, Fathi I, Imura T, Yamana H, Saitoh Y, Matsumura M, Fukuoka K, Miyagi S, Nakamura Y, Ohashi K, Unno M, Kamei T, Goto M. Preferable Transplant Site for Hepatocyte Transplantation in a Rat Model. Cell Transplant 2021; 30:9636897211040012. [PMID: 34525872 PMCID: PMC8450989 DOI: 10.1177/09636897211040012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Intraportal injection is regarded as the current standard procedure of hepatocyte transplantation (HTx). In islet transplantation, which shares many aspects with HTx, recent studies have clarified that instant blood-mediated inflammatory reaction (IBMIR), characterized by strong innate immune responses, can cause poor engraftment, so other transplant sites to avoid such a reaction have been established. Although IBMIR was reported to occur in HTx, few reports have evaluated alternative transplant sites for HTx. In this study, we sought to determine the optimum transplant site for HTx. Rat hepatocytes (1.0 × 107) were transplanted at the 9 transplant sites (intraportal (IPO), intrasplenic (IS), liver parenchyma, subcutaneous, intraperitoneal, renal subcapsular, muscle, inguinal subcutaneous white adipose tissue, and omentum) of analbuminemic rats. The serum albumin levels, immunohistochemical staining (albumin, TUNEL, and BrdU), and in vivo imaging of the grafts were evaluated. The serum albumin levels of the IPO group were significantly higher than those of the other groups (p < .0001). The BrdU-positive hepatocyte ratio of liver in the IS group (0.9% ± 0.2%) was comparable to that of the IPO group (0.9% ± 0.3%) and tended to be higher than that of the spleen in the IS group (0.5% ± 0.1%, p = .16). Considering the in vivo imaging evaluation and the influence of splenectomy, the graft function in the IS group may be almost entirely achieved by hepatocytes that have migrated to the liver. The present study clearly showed that the intraportal injection procedure is more efficient than other procedures for performing HTx
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Affiliation(s)
- Hiroyuki Ogasawara
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Akiko Inagaki
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Ibrahim Fathi
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Takehiro Imura
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hiroki Yamana
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yoshikatsu Saitoh
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Muneyuki Matsumura
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kengo Fukuoka
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shigehito Miyagi
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yasuhiro Nakamura
- Division of Pathology, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Kazuo Ohashi
- Laboratory of Drug Development and Science, Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Michiaki Unno
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Takashi Kamei
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Masafumi Goto
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan.,Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
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31
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Fujii Y, Iwasaki R, Ikeda S, Chimura S, Goto M, Yoshizaki K, Sakai H, Ito N, Mori T. Gastrointestinal stromal tumour lacking mutations in the KIT and PDGFRA genes in a cat. J Small Anim Pract 2021; 63:239-243. [PMID: 34409605 DOI: 10.1111/jsap.13416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 07/05/2021] [Accepted: 08/06/2021] [Indexed: 11/28/2022]
Abstract
Molecular subtyping in gastrointestinal stromal tumours is a useful method for predicting the efficacy of treatment using tyrosine kinase inhibitors in humans. However, owing to the paucity of reports on mutational analyses, the association between genetic mutations and the therapeutic response to tyrosine kinase inhibitors remains unclear in feline gastrointestinal stromal tumours. In this report, we describe the case of a cat with a gastrointestinal stromal tumour which was unresponsive to tyrosine kinase inhibitors. A mutational analysis revealed that the cat lacked mutations in both the KIT and platelet-derived growth factor receptor-alpha (PDGFRA) genes. Our findings are consistent with the fact that KIT/PDGFRA wild-type gastrointestinal stromal tumours are less responsive to tyrosine kinase inhibitors in humans. This signifies the need for further evaluation and possibly individualised treatment for gastrointestinal stromal tumours in cats on the basis of mutational analyses.
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Affiliation(s)
- Y Fujii
- Joint Graduate School of Veterinary Sciences, Gifu University, Gifu, Gifu, Japan.,Animal Medical Centre, Gifu University, Gifu, Gifu, Japan
| | - R Iwasaki
- Animal Medical Centre, Gifu University, Gifu, Gifu, Japan
| | - S Ikeda
- Chimura Animal Hospital, Iwakura, Aichi, Japan
| | - S Chimura
- Chimura Animal Hospital, Iwakura, Aichi, Japan
| | - M Goto
- Laboratory of Veterinary Pathology, Faculty of Applied Biological Sciences, Gifu University, Gifu, Gifu, Japan
| | - K Yoshizaki
- Laboratory of Veterinary Pathology, Faculty of Applied Biological Sciences, Gifu University, Gifu, Gifu, Japan
| | - H Sakai
- Joint Graduate School of Veterinary Sciences, Gifu University, Gifu, Gifu, Japan.,Laboratory of Veterinary Pathology, Faculty of Applied Biological Sciences, Gifu University, Gifu, Gifu, Japan
| | - N Ito
- Joint Graduate School of Veterinary Sciences, Gifu University, Gifu, Gifu, Japan
| | - T Mori
- Joint Graduate School of Veterinary Sciences, Gifu University, Gifu, Gifu, Japan.,Animal Medical Centre, Gifu University, Gifu, Gifu, Japan
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Imura T, Inagaki A, Igarashi Y, Goto M. Optimization of dye solutions for detecting damaged pancreatic tissues during islet isolation procedures. PLoS One 2021; 16:e0255733. [PMID: 34388180 PMCID: PMC8362985 DOI: 10.1371/journal.pone.0255733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 07/22/2021] [Indexed: 12/29/2022] Open
Abstract
We previously reported that dye was effective to prevent the leakage of enzyme solutions from pancreatic glands during an islet isolation procedure. However, the dye used for islet isolation has not yet been optimized. In this study, we focused on pyoktanin blue (PB), diagnogreen (DG), and indigo carmine (IC) as potential candidates among clinically established dyes. A serial dilution assay was performed to determine minimal effective concentrations of each dye for detecting damaged pancreatic tissues. According to the outcome of serial dilution assays, double minimum effective concentrations of each dye were used for in vitro toxicity assays on islets and used in the isolation procedure to investigate whether they adversely affect islet isolation efficiency. The evaluations included islet yield, ADP/ATP, ATP/DNA, glucose stimulation test, and insulin/DNA assays. Islet viability cultured with PB contained medium was significantly lower than the other dyes. DG and IC appeared to be non-toxic to the islets. In isolation experiments, the islet yield in the DG group was considerably lower than that in the Control group, suggesting that DG might inhibit enzyme activity. The present study demonstrates that IC could be a promising candidate for an effective dye to detect damaged pancreatic tissues without affecting the enzyme activity and islet quality.
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Affiliation(s)
- Takehiro Imura
- Division of Transplantation and Regenerative Medicine, Tohoku University School of Medicine, Sendai, Japan
| | - Akiko Inagaki
- Division of Transplantation and Regenerative Medicine, Tohoku University School of Medicine, Sendai, Japan
| | - Yasuhiro Igarashi
- Division of Transplantation and Regenerative Medicine, Tohoku University School of Medicine, Sendai, Japan
| | - Masafumi Goto
- Division of Transplantation and Regenerative Medicine, Tohoku University School of Medicine, Sendai, Japan
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
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33
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Sakaguchi N, Terazawa T, Ishizuka Y, Kodama H, Miyamoto T, Shimamoto F, Goto M, Izuhara K, Hamamoto H, Osumi W, Yamamoto M, Tanaka K, Okuda J, Uchiyama K, Higuchi K. P-27 The efficacy and safety of XELOX/SOX plus bevacizumab as neoadjuvant chemotherapy for locally advanced rectal cancer compared with XELOX/SOX: A retrospective study. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.05.082] [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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34
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Kumagai K, Yagi S, Yamaguchi T, Nagashima K, Nomura T, Watanabe M, Makuuchi R, Kawakami K, Otsuka S, Matsushima T, Kadowaki S, Haruta S, Cho H, Yamada T, Kakihara N, Imai Y, Fukunaga H, Saeki Y, Kanaji S, Boku N, Goto M. P-83 The efficacy of chemotherapy for gastric cancer with early recurrence during or after adjuvant S-1. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.05.138] [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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35
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Kimura K, Matsuura H, Kawamoto Y, Oishi T, Goto M, Ogawa K, Nishitani T, Isobe M, Osakabe M. Fast deuteron diagnostics using visible light spectra of 3He produced by deuteron-deuteron reaction in deuterium plasmas. Rev Sci Instrum 2021; 92:053524. [PMID: 34243281 DOI: 10.1063/5.0034683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 04/23/2021] [Indexed: 06/13/2023]
Abstract
The fast deuteron (non-Maxwellian component) diagnostic method, which is based on the higher resolution optical spectroscopic measurement, has been developed as a powerful tool. Owing to a decrease in the D-H charge-exchange cross section, the diagnostic ability of conventional optical diagnostic methods should be improved for ∼MeV energy deuterons. Because the 3He-H charge-exchange cross section is much larger than that of D-H in the ∼MeV energy range, the visible light (VIS) spectrum of 3He produced by the dueteron-dueteron (DD) reaction may be a useful tool. Although the density of 3He is small because it is produced via the DD reaction, improvement of the emissivity of the VIS spectrum of 3He can be expected by using a high-energy beam. We evaluate the VIS spectrum of 3He for the cases when a fast deuteron tail is formed and not formed in the ITER-like beam injected deuterium plasma. Even when the beam energy is in the MeV energy range, a large change appears in the half width at half maximum of the VIS spectrum. The emissivity of the VIS spectrum of 3He and the emissivity of bremsstrahlung are compared, and the measurable VIS spectrum is obtained. It is shown that the VIS spectrum of 3He is a useful tool for the MeV beam deuteron tail diagnostics.
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Affiliation(s)
- K Kimura
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
| | - H Matsuura
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
| | - Y Kawamoto
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - T Oishi
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M Goto
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K Ogawa
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - T Nishitani
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - M Isobe
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M Osakabe
- National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
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36
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Saitoh Y, Inagaki A, Fathi I, Imura T, Nishimaki H, Ogasawara H, Matsumura M, Miyagi S, Yasunami Y, Unno M, Kamei T, Goto M. Improvement of hepatocyte engraftment by co-transplantation with pancreatic islets in hepatocyte transplantation. J Tissue Eng Regen Med 2021; 15:361-374. [PMID: 33484496 PMCID: PMC8048420 DOI: 10.1002/term.3170] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 12/05/2020] [Accepted: 01/06/2021] [Indexed: 12/15/2022]
Abstract
Because of the fragility of isolated hepatocytes, extremely poor engraftment of transplanted hepatocytes remains a severe issue in hepatocyte transplantation. Therefore, improving hepatocyte engraftment is necessary to establish hepatocyte transplantation as a standard therapy. Since the pancreatic islets are known to have favorable autocrine effects, we hypothesized that the transplanted islets might influence not only the islets but also the nearby hepatocytes, subsequently promoting engraftment. We evaluated the effects of islet co-transplantation using an analbuminemic rat model (in vivo model). Furthermore, we established a mimicking in vitro model to investigate the underlying mechanisms. In an in vivo model, the hepatocyte engraftment was significantly improved only when the islets were co-transplanted to the nearby hepatocytes (p < 0.001). Moreover, the transplanted hepatocytes appeared to penetrate the renal parenchyma together with the co-transplanted islets. In an in vitro model, the viability of cultured hepatocytes was also improved by coculture with pancreatic islets. Of particular interest, the coculture supernatant alone could also exert beneficial effects comparable to islet coculture. Although insulin, VEGF, and GLP-1 were selected as candidate crucial factors using the Bio-Plex system, beneficial effects were partially counteracted by anti-insulin receptor antibodies. In conclusion, this study demonstrated that islet co-transplantation improves hepatocyte engraftment, most likely due to continuously secreted crucial factors, such as insulin, in combination with providing favorable circumstances for hepatocyte engraftment. Further refinements of this approach, especially regarding substitutes for islets, could be a promising strategy for improving the outcomes of hepatocyte transplantation.
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Affiliation(s)
- Yoshikatsu Saitoh
- Department of SurgeryTohoku University Graduate School of MedicineSendaiJapan
| | - Akiko Inagaki
- Division of Transplantation and Regenerative MedicineTohoku University Graduate School of MedicineSendaiJapan
| | - Ibrahim Fathi
- Division of Transplantation and Regenerative MedicineTohoku University Graduate School of MedicineSendaiJapan
| | - Takehiro Imura
- Division of Transplantation and Regenerative MedicineTohoku University Graduate School of MedicineSendaiJapan
| | - Hiroyasu Nishimaki
- Department of SurgeryTohoku University Graduate School of MedicineSendaiJapan
| | - Hiroyuki Ogasawara
- Department of SurgeryTohoku University Graduate School of MedicineSendaiJapan
| | - Muneyuki Matsumura
- Department of SurgeryTohoku University Graduate School of MedicineSendaiJapan
| | - Shigehito Miyagi
- Department of SurgeryTohoku University Graduate School of MedicineSendaiJapan
| | | | - Michiaki Unno
- Department of SurgeryTohoku University Graduate School of MedicineSendaiJapan
| | - Takashi Kamei
- Department of SurgeryTohoku University Graduate School of MedicineSendaiJapan
| | - Masafumi Goto
- Department of SurgeryTohoku University Graduate School of MedicineSendaiJapan
- Division of Transplantation and Regenerative MedicineTohoku University Graduate School of MedicineSendaiJapan
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37
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Peterson B, Kawamura G, van de Giessen P, Mukai K, Tanaka H, Sano R, Pandya S, Dai S, Masuzaki S, Akiyama T, Kobayashi M, Goto M, Motojima G, Sakamoto R, Ohno N, Morisaki T, Miyazawa J. Experimental observations and modelling of radiation asymmetries during N2 seeding in LHD. Nuclear Materials and Energy 2021. [DOI: 10.1016/j.nme.2020.100848] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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38
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Murakami I, Kato D, Oishi T, Goto M, Kawamoto Y, Suzuki C, Sakaue H, Morita S. Progress of tungsten spectral modeling for ITER edge plasma diagnostics based on tungsten spectroscopy in LHD. Nuclear Materials and Energy 2021. [DOI: 10.1016/j.nme.2021.100923] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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39
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Inagaki A, Imura T, Nakamura Y, Ohashi K, Goto M. The Liver Surface Is an Attractive Transplant Site for Pancreatic Islet Transplantation. J Clin Med 2021; 10:jcm10040724. [PMID: 33673132 PMCID: PMC7918755 DOI: 10.3390/jcm10040724] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 02/08/2021] [Accepted: 02/09/2021] [Indexed: 11/25/2022] Open
Abstract
In the current clinical islet transplantation, intraportal transplantation is regarded as the gold-standard procedure. However, in this procedure, 50 to 70% of the transplanted islets are immediately damaged due to a strong innate immune response based on islet–blood contact. We investigated the transplant efficiency of a novel method of liver surface transplantation using a syngeneic keratinocyte sheet to avoid islet–blood contact. To examine the influence of the keratinocyte sheet, substantial amounts of syngeneic islets (8 IEQs/g) were transplanted on the liver surface of diabetic rats, while marginal amounts of islets (4 IEQs/g) were transplanted via intraportal transplantation to compare the transplant efficiency. Blood glucose, intraperitoneal glucose tolerance, immunohistochemistry, and in vivo imaging findings of the cell sheet were evaluated. The study showed that islet transplantation to the liver surface immediately followed by a syngeneic keratinocyte sheet covering was effective for curing diabetic rats, while no rats were cured in the group without the cell sheet. Notably, islet grafts transplanted via this approach appeared to penetrate into the liver parenchyma. However, the transplant efficiency did not reach that of intraportal transplantation. Further refinements of this approach by introducing mesothelial or fibroblast cell sheets in combination with a preferable scaffold for islet grafts may help to improve the transplant efficiency.
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Affiliation(s)
- Akiko Inagaki
- Division of Transplantation and Regenerative Medicine, Graduate School of Medicine, Tohoku University, Sendai 980-0872, Japan; (A.I.); (T.I.)
| | - Takehiro Imura
- Division of Transplantation and Regenerative Medicine, Graduate School of Medicine, Tohoku University, Sendai 980-0872, Japan; (A.I.); (T.I.)
| | - Yasuhiro Nakamura
- Division of Pathology, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai 983-8536, Japan;
| | - Kazuo Ohashi
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka 565-0871, Japan;
| | - Masafumi Goto
- Division of Transplantation and Regenerative Medicine, Graduate School of Medicine, Tohoku University, Sendai 980-0872, Japan; (A.I.); (T.I.)
- Correspondence: ; Tel.: +81-22-717-7895
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Sunohara T, Imamura H, Goto M, Fukumitsu R, Matsumoto S, Fukui N, Oomura Y, Akiyama T, Fukuda T, Go K, Kajiura S, Shigeyasu M, Asakura K, Horii R, Sakai C, Sakai N. Neck Location on the Outer Convexity is a Predictor of Incomplete Occlusion in Treatment with the Pipeline Embolization Device: Clinical and Angiographic Outcomes. AJNR Am J Neuroradiol 2021; 42:119-125. [PMID: 33184073 DOI: 10.3174/ajnr.a6859] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 08/11/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND PURPOSE With the increasing use of the Pipeline Embolization Device for the treatment of aneurysms, predictors of clinical and angiographic outcomes are needed. This study aimed to identify predictors of incomplete occlusion at last angiographic follow-up. MATERIALS AND METHODS In our retrospective, single-center cohort study, 105 ICA aneurysms in 89 subjects were treated with Pipeline Embolization Devices. Patients were followed per standardized protocol. Clinical and angiographic outcomes were analyzed. We introduced a new morphologic classification based on the included angle of the parent artery against the neck location: outer convexity type (included angle, <160°), inner convexity type (included angle, >200°), and lateral wall type (160° ≤ included angle ≤200°). This classification reflects the metal coverage rate and flow dynamics. RESULTS Imaging data were acquired in 95.3% of aneurysms persistent at 6 months. Complete occlusion was achieved in 70.5%, and incomplete occlusion, in 29.5% at last follow-up. Multivariable regression analysis revealed that 60 years of age or older (OR, 5.70; P = .001), aneurysms with the branching artery from the dome (OR, 10.56; P = .002), fusiform aneurysms (OR, 10.2; P = .009), and outer convexity-type saccular aneurysms (versus inner convexity type: OR, 30.3; P < .001; versus lateral wall type: OR, 9.71; P = .001) were independently associated with a higher rate of incomplete occlusion at the last follow-up. No permanent neurologic deficits or rupture were observed in the follow-up period. CONCLUSIONS The aneurysm neck located on the outer convexity is a new, incomplete occlusion predictor, joining older age, fusiform aneurysms, and aneurysms with the branching artery from the dome. No permanent neurologic deficits or rupture was observed in the follow-up, even with incomplete occlusion.
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Affiliation(s)
- T Sunohara
- From the Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Japan.
| | - H Imamura
- From the Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Japan
| | - M Goto
- From the Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Japan
| | - R Fukumitsu
- From the Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Japan
| | - S Matsumoto
- From the Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Japan
| | - N Fukui
- From the Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Y Oomura
- From the Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Japan
| | - T Akiyama
- From the Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Japan
| | - T Fukuda
- From the Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Japan
| | - K Go
- From the Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Japan
| | - S Kajiura
- From the Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Japan
| | - M Shigeyasu
- From the Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Japan
| | - K Asakura
- From the Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Japan
| | - R Horii
- From the Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Japan
| | - C Sakai
- From the Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Japan
| | - N Sakai
- From the Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Japan
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Fukaya Y, Goto M, Nakagawa S, Nakajima K, Takahashi K, Sakon A, Sano T, Hashimoto K. REACTOR PHYSICS EXPERIMENT IN A GRAPHITE-MODERATION SYSTEM FOR HTGR. EPJ Web Conf 2021. [DOI: 10.1051/epjconf/202124709017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The Japan Atomic Energy Agency (JAEA) started the Research and Development (R&D) to improve nuclear prediction techniques for High Temperature Gas-cooled Reactors (HTGRs). The objectives are to introduce a generalized bias factor method to avoid full mock-up experiment for the first commercial HTGR and to introduce reactor noise analysis to High Temperature Engineering Test Reactor (HTTR) experiment to observe sub-criticality. To achieve the objectives, the reactor core of graphite-moderation system named B7/4”G2/8”p8EUNU+3/8”p38EU(1) was newly composed in the B-rack of Kyoto University Critical Assembly (KUCA). The core is composed of the fuel assembly, driver fuel assembly, graphite reflector, and polyethylene reflector. The fuel assembly is composed of enriched uranium plate, natural uranium plate and graphite plates to realize the average fuel enrichment of HTTR and it’s spectrum. However, driver fuel assembly is necessary to achieve the criticality with the small-sized core. The core plays a role of the reference core of the bias factor method, and the reactor noise was measured to develop the noise analysis scheme. In this study, the overview of the criticality experiments is reported. The reactor configuration with graphite moderation system is rare case in the KUCA experiments, and this experiment is expected to contribute not only for an HTGR development but also for other types of a reactor in the graphite moderation system such as a molten salt reactor development.
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Shimazaki T, Yamada K, Sato K, Jimbo K, Nakamura H, Goto M, Matsubara T, Mizokami K, Iwahashi S, Sasaki T, Shiba N. Primary treatment of atlantoaxial rotatory fixation in children: a multicenter, retrospective series of 125 cases. J Neurosurg Spine 2020:1-8. [PMID: 33276329 DOI: 10.3171/2020.7.spine20183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 07/01/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The primary treatment for atlantoaxial rotatory fixation (AARF) remains controversial. The aim of this study was to investigate the primary treatment for AARF and create an algorithm for primary treatment. METHODS The authors analyzed the data of 125 pediatric patients at four medical institutions from April 1989 to December 2018. The patients were reported to have neck pain, torticollis, and restricted neck range of motion and were diagnosed according to the Fielding classification as type I or II. As a primary treatment, 88 patients received neck collar fixation, and 28 of these patients did not show symptom relief and required Glisson traction. Thirty-seven patients were primarily treated with Glisson traction. In total, 65 patients, including neck collar treatment failure patients, underwent Glisson traction in hospitals. RESULTS The success rate of treatment was significantly higher in the Glisson traction group (97.3%) than in the neck collar fixation group (68.2%) (p = 0.0001, Wilcoxon test). In the neck collar effective group, Fielding type I was more predominant (p = 0.0002, Wilcoxon test) and the duration from onset to the first visit was shorter (p = 0.02, Wilcoxon test) than that in the neck collar ineffective group. Using multivariate logistic regression analysis with the above items, the authors generalized from the estimated formula: logit [p(success group by neck collar fixation group)|duration from onset to the first visit (x1), Fielding type (x2)] = 0.4(intercept) - 0.15x1 + 1.06x2, where x1 is the number of days and x2 = 1 (for Fielding type I) or -1 (for Fielding type II). In cases for which the score is a positive value, the neck collar should be chosen. Conversely, in cases for which the score is a negative value, Glisson traction should be the first choice. CONCLUSIONS According to this formula, in patients with Fielding type I AARF, neck collar fixation should be allowed only if the duration from onset is ≤ 10 days. In patients with Fielding type II, because the score would be a negative value, Glisson traction should be performed as the primary treatment.
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Takashima A, Chin K, Minashi K, Kadowaki S, Nishina T, Izawa N, Amagai K, Machida N, Goto M, Taku K, Ishizuka N, Takahari D. 158P A phase II study of trastuzumab with S-1 plus oxaliplatin for HER2-positive advanced gastric cancer (HIGHSOX study): Final report. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.10.179] [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: 11/24/2022] Open
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Takase K, Hata Y, Morisawa Y, Goto M, Tanaka S, Hamada J, Hayashida K, Fujii Y, Morihara T, Yamamoto N, Inui H, Shiozaki H. Treatment of acromioclavicular joint separations in Japan: a survey. JSES Int 2020; 5:51-55. [PMID: 33554164 PMCID: PMC7846705 DOI: 10.1016/j.jseint.2020.09.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background Treatment options for acromioclavicular joint (ACJ) separations are highly dependent on severity, as well as the patient’s background. Furthermore, some patients can be switched from conservative to surgical treatment. In this study, we conducted a mail-based questionnaire survey of members of the Japan Shoulder Society on the administration of treatments for ACJ separations. Methods A questionnaire survey with 5 categories was mailed to all 1655 members of the Japan Shoulder Society (including 59 councilors): initial treatment, whether surgery was performed, indications for surgery based on severity, switching from conservative to surgical treatment, and surgical methods. Results Altogether, 183 members, including 56 councilors, responded. Regarding the initial treatment, 17 respondents opted for treatment without immobilization or fixation and 166 opted for immobilization or fixation. Of the members, 11 opted for only conservative treatment whereas 172 chose surgery depending on the case; of the latter, 9 considered it for patients with a Rockwood classification of type 2 or higher; 120, for patients with type 3 or higher; and 172, for patients with types 4-6. Furthermore, 75 of 172 members had experience switching to surgical treatment during conservative treatment. For 64 of 172 members, the modified Cadenat method was the most common surgical method. Conclusions Only 11 members opted for conservative treatment of ACJ separations, and approximately 95% of physicians chose surgery. Furthermore, >70% of physicians considered surgery for an injury classified as type 3 or higher, and 37% of members performed the modified Cadenat method. However, the popularization of arthroscopic surgery may affect the selection of surgical methods in the future.
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Affiliation(s)
- Katsumi Takase
- Corresponding author: Katsumi Takase, MD, PhD, Department of Orthopedic Surgery, Tokyo Medical University, 6-7-1 Nishishinjuku Shinjuku-ku, Tokyo, 160-0023, Japan.
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Tokodai K, Miyagi S, Nakanishi W, Fujio A, Kashiwadate T, Goto M, Unno M, Kamei T. Effects of re-augmenting maintenance immunosuppression on post-transplant donor-specific HLA antibodies in liver transplantation. Transpl Immunol 2020; 63:101334. [PMID: 32919028 DOI: 10.1016/j.trim.2020.101334] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 09/05/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND Donor-specific antibodies (DSAs) have various negative short- and long-term effects after organ transplantation. DSAs are prevalent in patients with insufficient immunosuppression; thus, even patients with stable conditions after liver transplantation should be under optimized immunosuppression. However, the effect of re-augmenting immunosuppression therapy for patients with insufficient immunosuppression remains unclear. In this study, we investigated the long-term changes and the effects of immunosuppression (IS) re-augmentation on the DSA status. METHODS Two DSA screenings were performed in 67 patients during long-term follow-up after liver transplantation. After the first screening, IS re-augmentation was performed in patients with consent. The effects of IS re-augmentation on the DSA status were analyzed using data of the serial DSA screenings. Negative conversion was defined as DSA positivity with MFI > 1000 converted to MFI < 1000. Improvement of DSA status was defined as either a 50% reduction of MFI or negative conversion. RESULTS The median interval between the first and second DSA screening was 50 months. Among 67 patients, 43 were positive for DSAs on the first screening. Among these 43 patients, 30 had minimal to no IS therapy at the time of the first screening. Among the 30 patients, IS re-augmentation was conducted in 19. A comparison between the patients with a re-augmented IS and those with a sustained minimized IS showed that the DSA levels significantly decreased in the former (63% (12/19) vs. 18% (2/11), p = 0.02). CONCLUSIONS The results of this study indicate that post-liver transplant IS re-augmentation had suppressive effects on the DSA status. However, the clinical significance of DSA-negative conversion and/or mean fluorescence intensity reduction needs to be further investigated through histological evaluation and/or graft survival during longer follow-up periods.
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Affiliation(s)
- Kazuaki Tokodai
- Department of Surgery, Tohoku University, 1-1 Seiryo-machi, Aoba-ku, Sendai, Japan.
| | - Shigehito Miyagi
- Department of Surgery, Tohoku University, 1-1 Seiryo-machi, Aoba-ku, Sendai, Japan
| | - Wataru Nakanishi
- Department of Surgery, Tohoku University, 1-1 Seiryo-machi, Aoba-ku, Sendai, Japan
| | - Atsushi Fujio
- Department of Surgery, Tohoku University, 1-1 Seiryo-machi, Aoba-ku, Sendai, Japan
| | - Toshiaki Kashiwadate
- Department of Surgery, Tohoku University, 1-1 Seiryo-machi, Aoba-ku, Sendai, Japan
| | - Masafumi Goto
- Department of Surgery, Tohoku University, 1-1 Seiryo-machi, Aoba-ku, Sendai, Japan; Division of Transplantation and Regenerative Medicine, Tohoku University, 1-1 Seiryo-machi, Aoba-ku, Sendai, Japan
| | - Michiaki Unno
- Department of Surgery, Tohoku University, 1-1 Seiryo-machi, Aoba-ku, Sendai, Japan
| | - Takashi Kamei
- Department of Surgery, Tohoku University, 1-1 Seiryo-machi, Aoba-ku, Sendai, Japan
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Ito K, Nakagawa M, Hori K, Tashima L, Goto M, Yanagida S, Suzuki J, Kaya R, Kawabata A, Park J, Nasu H, Nishio S, Kondo E, Kaneda M, Tsubamoto H, Arakawa A, Nagasawa T, Yamada K. 834P A phase II study of gemcitabine, cisplatin, and bevacizumab for first recurrent and refractory ovarian clear-cell carcinoma (KCOG-G1601 trial). Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.973] [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: 10/23/2022] Open
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Noor SM, Anuar AN, Tamunaidu P, Goto M, Shameli K, Halim MHA. Nanocellulose production from natural and recyclable sources: A review. ACTA ACUST UNITED AC 2020. [DOI: 10.1088/1755-1315/479/1/012027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Goto M, Yokogawa N, Miyoshi Y, Shimada K. SAT0208 INCIDENCES OF ADVERSE EFFECTS AND DISEASE FLARE DUE TO PNEUMOCYSTIS PNEUMONIA PROPHYLAXIS WITH TRIMETHOPRIM/SULFAMETHOXAZOLE IN SYSTEMIC LUPUS ERYTHEMATOSUS PATIENTS. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.4551] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Methods of preventing pneumocystis pneumonia (PCP) in systemic lupus erythematosus (SLE) are controversial. Previous studies have verified the efficacy and safety of trimethoprim/sulfamethoxazole (TMP-SMX) in patients with rheumatic diseases1. However, as for SLE, some clinicians advise against prescribing TMP-SMX because sulfa allergy is reportedly more common in SLE than in other rheumatic diseases2, 3. Anecdotally, sulfonamides may also worsen SLE itself, but few data are available on lupus flares related to sulfonamides3.Objectives:This study aimed to assess the incidences of adverse effects and disease flare due to PCP prophylaxis with TMP-SMX in SLE patients.Methods:SLE patients seen at our hospital between September 2010 and April 2018 who received TMP-SMX as a PCP prophylaxis were enrolled. The clinical manifestations, treatment course, adverse drug reactions, and occurrence of lupus flares were retrospectively assessed from the medical records. The Naranjo adverse drug reaction probability scale4 was used to determine whether the reactions were induced by SMX-TMP. According to the British Isles Lupus Assessment Group (BILAG) 2004 index, a severe flare of lupus was defined as a development of a new grade A manifestation, and a moderate flare as a development of grade B manifestation following grade C, D or E. Two board-certificated rheumatologists reviewed the medical records in a blinded fashion to determine the reason for the flare, with disagreement resolved by consensus.Results:In total, 188 SLE patients were enrolled; of these, 117 (62.2%) had no adverse events and were able to continue taking SMX-TMP as needed. Seventy-one patients (37.8%) stopped SMX-TMP due to suspected adverse drug reactions, including fever, rash, liver function disorder, and cytopenia. The Naranjo scale indicated “definite” in 4, “probable” in 39, and “possible” in 28. Eighteen-patients restarted the SMX-TMP and 9 patients could continue the prophylaxis without adverse effects. Five patients were hospitalized to treat the adverse events: 3 with drug rash (concomitant use of hydroxychloroquine in 2), 1 with hypersensitivity (concomitant use of azathioprine) and 1 with hyponatremia, respectively.Lupus flares occurred in 10 patients (5.3%) within one month after the start of the the SMX-TMP prophylaxis. Macrophage activation syndrome (MAS) or neuropsychiatric SLE occurred in 9 of them. Of 188 cases, 2 patients (1.1%) developed a new onset of MAS during the stable clinical course as the flare, which was considered due to SMX-TMP. Confounding factors, including high disease activity and the reduction of glucocorticoids, were identified in other 8 flares.Conclusion:PCP prophylaxis with SMX-TMP was tolerable in most SLE patients. However, a small number of SLE patients developed severe adverse effects or disease flares due to the SMX-TMP.References:[1]Park JW, et al. Annals of the Rheumatic Diseases 2018;77:644-649.[2]Suyama Y, et al. Modern Rheumatology 2016;26:557-61[3]Petri M, et al. Journal of Rheumatology 1992;19:265-9[4]Naranjo CA, et al. Clinical Pharmacology and Therapeutics 1981;30:239-45Disclosure of Interests:None declared
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Yamada S, Miyagi S, Hara Y, Kakizaki Y, Sasajima H, Mitsui K, Fujimori K, Unno M, Kamei T, Goto M. Effects of Short-Term Normothermic and Subnormothermic Perfusion After Cold Preservation on Liver Transplantation From Donors After Cardiac Death. Transplant Proc 2020; 52:1639-1642. [PMID: 32471629 DOI: 10.1016/j.transproceed.2020.01.147] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 01/22/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND Liver transplantation from donors after cardiac death (DCD) could increase the pool of organs. We previously reported that oxygenated subnormothermic (20°C-25°C) ex vivo liver perfusion (SELP) improved the graft viability in rats. This study aimed to compare the effectiveness of SELP and normothermic (37°C) ex vivo liver perfusion (NELP) after cold storage (CS) in DCD liver grafts. METHODS Male Wistar rats were used, and grafts were retrieved 30 minutes after cardiac arrest. We performed oxygenated NELP and SELP with a Krebs-Henseleit buffer for different time points and durations: Group 0, donation performed from heart-beating donors (control); Group 1 (DCD group), donation performed from DCD donors with no treatments; Group 2, NELP performed before CS (30 minutes); Group 3, NELP performed after CS (30 minutes); Group 4, SELP performed after CS (30 minutes); Group 5, SELP performed after CS (60 minutes); and Group 6, SELP performed after CS (90 minutes). After 15 minutes of incubation at room temperature, the grafts were reperfused under normothermic conditions for 60 minutes as a model of liver transplantation. RESULTS No significant differences in body and liver weight were observed between all groups. In the SELP after CS groups, even 30 minutes of perfusion improved bile production, tumor necrosis factor-α, and interleukin-1β significantly compared with the DCD group (P < .05), comparable with NELP groups. CONCLUSION SELP rescued DCD livers from ischemia-reperfusion injury the same as the normothermic perfusion before or after CS groups. SELP after CS is more convenient than normothermic perfusion; hence, this technique may increase the organ pool.
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Affiliation(s)
- Shuhei Yamada
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shigehito Miyagi
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan.
| | - Yasuyuki Hara
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yuta Kakizaki
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hideaki Sasajima
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kazuhiro Mitsui
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Keisei Fujimori
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Michiaki Unno
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Takashi Kamei
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Masafumi Goto
- Department of Transplantation and Regenerative Medicine, Tohoku University, Graduate School of Medicine, Sendai, Japan
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Harada A, Goto M, Ikeya M, Takenaka N, Tanaka A, Sakurai H. Neonatal transplantation of iPSC-derived MSCs affects systemic collagen vi restoration in ullrich congenital muscular dystrophy mice. Cytotherapy 2020. [DOI: 10.1016/j.jcyt.2020.03.143] [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: 11/15/2022]
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