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Komatsu S, Kato N, Kitai H, Funahashi Y, Noda Y, Tsubota S, Tanaka A, Sato Y, Maeda K, Saito S, Furuhashi K, Ishimoto T, Kosugi T, Maruyama S, Kadomatsu K. Detecting and exploring kidney-derived extracellular vesicles in plasma. Clin Exp Nephrol 2024:10.1007/s10157-024-02464-z. [PMID: 38436899 DOI: 10.1007/s10157-024-02464-z] [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: 09/09/2023] [Accepted: 01/13/2024] [Indexed: 03/05/2024]
Abstract
BACKGROUND Extracellular vesicles (EVs) have received considerable attention as ideal biomarkers for kidney diseases. Most reports have focused on urinary EVs, that are mainly derived from the cells in the urinary tract. However, the detection and the application of kidney-derived EVs in plasma remains uncertain. METHODS We examined the kidney-derived small EVs (sEVs) in plasma that were supposedly released from renal mesangial and glomerular endothelial cells, using clinical samples from healthy controls and patients with kidney transplants. Plasma from healthy controls underwent ultracentrifugation, followed by on-bead flow cytometry, targeting α8 integrin, an antigen-specific to mesangial cells. To confirm the presence of kidney-derived sEVs in peripheral blood, plasma from ABO-incompatible kidney transplant recipients was ultracentrifuged, followed by western blotting for donor blood type antigens. RESULTS Immunohistochemistry and immunoelectron microscopy confirmed α8 integrin expression in kidney mesangial cells and their sEVs. The CD9-α8 integrin double-positive sEVs were successfully detected using on-bead flow cytometry. Western blot analysis further revealed transplanted kidney-derived sEVs containing blood type B antigens in non-blood type B recipients, who had received kidneys from blood type B donors. Notably, a patient experiencing graft kidney loss exhibited diminished signals of sEVs containing donor blood type antigens. CONCLUSION Our findings demonstrate the potential usefulness of kidney-derived sEVs in plasma in future research for kidney diseases.
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Affiliation(s)
- Shintaro Komatsu
- Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
- Division of Molecular Oncology, Center for Neurological Diseases and Cancer, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
- Department of Biochemistry, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Noritoshi Kato
- Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan.
| | - Hiroki Kitai
- Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
- Department of Biochemistry, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Yoshio Funahashi
- Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Yuhei Noda
- Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
- Department of Biochemistry, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Shoma Tsubota
- Department of Biochemistry, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Akihito Tanaka
- Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Yuka Sato
- Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Kayaho Maeda
- Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Shoji Saito
- Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Kazuhiro Furuhashi
- Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Takuji Ishimoto
- Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Tomoki Kosugi
- Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Shoichi Maruyama
- Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Kenji Kadomatsu
- Department of Biochemistry, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
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Nagashima Y, Araki Y, Nishida K, Kuramitsu S, Wakabayashi K, Shimato S, Kinkori T, Nishizawa T, Kano T, Hasegawa T, Noda A, Maeda K, Yamamoto Y, Suzuki O, Koketsu N, Okada T, Iwasaki M, Nakabayashi K, Fujitani S, Maki H, Kuwatsuka Y, Nishihori M, Tanei T, Nishikawa T, Nishimura Y, Saito R. Efficacy of intraoperative irrigation with artificial cerebrospinal fluid in chronic subdural hematoma surgery: study protocol for a multicenter randomized controlled trial. Trials 2024; 25:6. [PMID: 38166992 PMCID: PMC10759626 DOI: 10.1186/s13063-023-07889-7] [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: 08/19/2023] [Accepted: 12/17/2023] [Indexed: 01/05/2024] Open
Abstract
BACKGROUND The surgical techniques for treatment of chronic subdural hematoma (CSDH), a common neurosurgical condition, have been discussed in a lot of clinical literature. However, the recurrence proportion after CSDH surgery remains high, ranging from 10 to 20%. The standard surgical procedure for CSDH involves a craniostomy to evacuate the hematoma, but irrigating the hematoma cavity during the procedure is debatable. The authors hypothesized that the choice of irrigation fluid might be a key factor affecting the outcomes of surgery. This multicenter randomized controlled trial aims to investigate whether intraoperative irrigation using artificial cerebrospinal fluid (ACF) followed by the placement of a subdural drain would yield superior results compared to the placement of a subdural drain alone for CSDH. METHODS The study will be conducted across 19 neurosurgical departments in Japan. The 1186 eligible patients will be randomly allocated to two groups: irrigation using ACF or not. In either group, a subdural drain is to be placed for at least 12 h postoperatively. Similar to what was done in previous studies, we set the proportion of patients that meet the criteria for ipsilateral reoperation at 7% in the irrigation group and 12% in the non-irrigation group. The primary endpoint is the proportion of patients who meet the criteria for ipsilateral reoperation within 6 months of surgery (clinical worsening of symptoms and increased hematoma on imaging compared with the postoperative state). The secondary endpoints are the proportion of reoperations within 6 months, the proportion being stratified by preoperative hematoma architecture by computed tomography (CT) scan, neurological symptoms, patient condition, mortality at 6 months, complications associated with surgery, length of hospital stay from surgery to discharge, and time of the surgical procedure. DISCUSSION We present the study protocol for a multicenter randomized controlled trial to investigate our hypothesis that intraoperative irrigation with ACF reduces the recurrence proportion after the removal of chronic subdural hematomas compared with no irrigation. TRIAL REGISTRATION ClinicalTrials.gov jRCT1041220124. Registered on January 13, 2023.
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Affiliation(s)
- Yoshitaka Nagashima
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Yoshio Araki
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
- Department of Neurosurgery, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, Nagoya, Japan
| | - Kazuki Nishida
- Department of Advanced Medicine, Nagoya University Hospital, Nagoya, Japan
| | - Shunichiro Kuramitsu
- Department of Neurosurgery, National Hospital Organization Nagoya Medical Center, Nagoya, Japan
| | | | - Shinji Shimato
- Department of Neurosurgery, Handa City Hospital, Handa, Japan
| | - Takeshi Kinkori
- Department of Neurosurgery, Okazaki City Hospital, Okazaki, Japan
| | | | - Takahisa Kano
- Department of Neurosurgery, Anjo Kosei Hospital, Anjo, Japan
| | | | - Atsushi Noda
- Department of Neurosurgery, Nishio Municipal Hospital, Nishio, Japan
| | - Kenko Maeda
- Department of Neurosurgery, JCHO Chukyo Hospital, Nagoya, Japan
| | - Yu Yamamoto
- Department of Neurosurgery, Inazawa Municipal Hospital, Inazawa, Japan
| | - Osamu Suzuki
- Department of Neurosurgery, Nagoya Ekisaikai Hospital, Nagoya, Japan
| | - Naoki Koketsu
- Department of Neurosurgery, Tosei General Hospital, Seto, Japan
| | - Takeshi Okada
- Department of Neurosurgery, Kainan Hospital, Yatomi, Japan
| | - Masashige Iwasaki
- Department of Neurosurgery, Shizuoka Saiseikai General Hospital, Shizuoka, Japan
| | - Kiyo Nakabayashi
- Department of Neurosurgery, Yokkaichi Municipal Hospital, Yokkaichi, Japan
| | - Shigeru Fujitani
- Department of Neurosurgery, Japanese Red Cross Aichi Medical Center Nagoya Daiichi Hospital, Nagoya, Japan
| | - Hideki Maki
- Department of Neurosurgery, Ogaki Municipal Hospital, Ogaki, Japan
| | - Yachiyo Kuwatsuka
- Department of Advanced Medicine, Nagoya University Hospital, Nagoya, Japan
| | - Masahiro Nishihori
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Takafumi Tanei
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Tomohide Nishikawa
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yusuke Nishimura
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Ryuta Saito
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Tanei T, Maesawa S, Nishimura Y, Nagashima Y, Ishizaki T, Ando M, Kuwatsuka Y, Hashizume A, Kurasawa S, Saito R. Efficacy of the latest new stimulation patterns of spinal cord stimulation for intractable neuropathic pain compared to conventional stimulation: study protocol for a clinical trial. Trials 2023; 24:604. [PMID: 37742013 PMCID: PMC10517501 DOI: 10.1186/s13063-023-07637-x] [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: 06/27/2023] [Accepted: 09/08/2023] [Indexed: 09/25/2023] Open
Abstract
BACKGROUND Spinal cord stimulation (SCS) is one of the neuromodulation therapies for chronic neuropathic pain. The conventional paresthesia-based SCS involves the application of tonic stimulation that induces a sense of paresthesia. Recently, new SCS stimulation patterns without paresthesia have been developed. Differential target multiplexed (DTM) stimulation and fast-acting subperception therapy (FAST) stimulation are the latest paresthesia-free SCS patterns. METHODS A single-center, open-label, crossover, randomized clinical trial to investigate the superiority of SCS using the latest new stimulation patterns over conventional tonic stimulation for neuropathic pain is planned. This study consists of two steps: SCS trial (first step) and SCS system implantation (second step). In the SCS trial, participants will be randomly assigned to 4 groups receiving stimulation, including tonic, DTM, and FAST. Each stimulation will then be performed for 2 days, and a visual analog scale (VAS) for pain will be evaluated before and after each stimulation pattern. A stimulation-off period for 1 day is set between each stimulation pattern to wash out the residual previous stimulation effects. Pain improvement is defined as more than 33% reduction in the pain VAS. The primary analysis will compare pain improvement between the new stimulation patterns and the conventional tonic stimulation pattern in the SCS trial. The secondary outcomes will be evaluated as follows: (1) the relationships between causative disease and improvement rate by each stimulation pattern; (2) comparison of pain improvement between the DTM and FAST stimulation patterns in all cases and by causative disease; (3) changes in assessment items preoperatively to 24 months after the implantation; (4) preoperative factors associated with long-term effects defined as continuing for more than 12 months; and (5) adverse events related to this study 3 months after the implantation. DISCUSSION This study aims to clarify the effectiveness of the latest new stimulation patterns compared to the conventional tonic stimulation. In addition, which stimulation pattern is most effective for which kind of causative disease will be clarified. TRIAL REGISTRATION Japan Registry of Clinical Trials (jRCT) 1,042,220,094. Registered on 21 November 2022, and last modified on 6 January 2023. jRCT is an approved member of the Primary Registry Network of WHO ICTRP.
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Affiliation(s)
- Takafumi Tanei
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan.
| | - Satoshi Maesawa
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Yusuke Nishimura
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Yoshitaka Nagashima
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Tomotaka Ishizaki
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Masahiko Ando
- Department of Advanced Medicine, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Yachiyo Kuwatsuka
- Department of Advanced Medicine, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Atsushi Hashizume
- Department of Clinical Research Education, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Shimon Kurasawa
- Department of Clinical Research Education, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Ryuta Saito
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
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Tanei T, Maesawa S, Nishimura Y, Nagashima Y, Ishizaki T, Ando M, Kuwatsuka Y, Hashizume A, Kurasawa S, Saito R. Differential target multiplexed spinal cord stimulation using a paddle-type lead placed at the appropriate site for neuropathic pain after spinal cord injury in patients with past spinal surgical histories: study protocol for an exploratory clinical trial. Trials 2023; 24:395. [PMID: 37308986 DOI: 10.1186/s13063-023-07433-7] [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: 04/15/2023] [Accepted: 06/05/2023] [Indexed: 06/14/2023] Open
Abstract
BACKGROUND Neuropathic pain after spinal cord injury (SCI), both traumatic and non-traumatic, is refractory to various treatments. Spinal cord stimulation (SCS) is one of the neuromodulation therapies for neuropathic pain, although SCS has insufficient efficacy for neuropathic pain after SCI. The reasons are presumed to be inappropriate locations of SCS leads and conventional tonic stimulation itself does not have a sufficient analgesic effect for the pain. In patients with past spinal surgical histories, the cylinder-type leads are likely to be placed on the caudal side of the SCI because of surgical adhesions. Differential target multiplexed (DTM) stimulation is one of the latest new stimulation patterns that is superior to conventional stimulation. METHODS A single-center, open-label, randomized, two-way crossover trial is planned to investigate the efficacy of SCS using DTM stimulation placing a paddle lead at the appropriate site for neuropathic pain after SCI in patients with spinal surgical histories. The paddle-type lead delivers energy more efficiently than a cylinder-type lead. This study consists of two steps: SCS trial (first step) and SCS system implantation (second step). The primary outcome is rates of achieving pain improvement with more than 33% reduction 3 months after SCS system implantation. The secondary outcomes are to be evaluated as follows: (1) effectiveness of DTM and tonic stimulations during the SCS trial; (2) changes of assessment items from 1 to 24 months; (3) relationships between the result of the SCS trial and the effects 3 months after SCS system implantation; (4) preoperative factors associated with a long-term effect, defined as continuing for more than 12 months; and (5) whether gait function improves from 1 to 24 months. DISCUSSION A paddle-type lead placed on the rostral side of SCI and using DTM stimulation may provide significant pain relief for patients with intractable neuropathic pain after SCI in patients with past spinal surgical histories. TRIAL REGISTRATION Japan Registry of Clinical Trials (jRCT) jRCT 1042220093. Registered on 21 November 2022, and last modified on 6 January 2023. jRCT is approved as a member of the Primary Registry Network of WHO ICTRP.
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Affiliation(s)
- Takafumi Tanei
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan.
| | - Satoshi Maesawa
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
| | - Yusuke Nishimura
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
| | - Yoshitaka Nagashima
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
| | - Tomotaka Ishizaki
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
| | - Masahiko Ando
- Department of Advanced Medicine, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
| | - Yachiyo Kuwatsuka
- Department of Advanced Medicine, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
| | - Atsushi Hashizume
- Department of Clinical Research Education, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
| | - Shimon Kurasawa
- Department of Clinical Research Education, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
| | - Ryuta Saito
- Department of Neurosurgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
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Terakura S, Konuma T, Tanaka M, Ozawa Y, Onizuka M, Nanno S, Onishi Y, Aotsuka N, Kondo T, Kawakita T, Kato J, Kobayashi T, Nishida T, Yamaguchi T, Kuwatsuka Y, Takahashi S. Randomised controlled trial of conditioning regimen for cord blood transplantation for adult myeloid malignancies comparing high-dose cytarabine/cyclophosphamide/total body irradiation with versus without G-CSF priming: G-CONCORD study protocol. BMJ Open 2020; 10:e040467. [PMID: 33277285 PMCID: PMC7722372 DOI: 10.1136/bmjopen-2020-040467] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
INTRODUCTION A better long-term quality of life after umbilical cord blood transplantation (CBT) is observed compared with transplants from other alternative donors, whereas graft failure and relapses after CBT are still major issues. To minimise graft failure and relapse after CBT, intensification of conditioning by the addition of high-dose cytosine arabinoside (CA) and concomitant continuous use of granulocyte-colony stimulating factor (G-CSF) are reported to convey a significantly better survival after CBT in some retrospective studies. To confirm the effect of G-CSF plus CA combination, in addition to the standard conditioning regimen, cyclophosphamide (CY)/total body irradiation (TBI), we design a randomised controlled study comparing CA/CY/TBI with versus without G-CSF priming (G-CSF combined conditioned cord blood transplantation [G-CONCORD] study). METHODS AND ANALYSIS This is a multicentre, open-label, randomised phase III study that aimed to compare G-CSF+CA/CY/TBI as a conditioning regimen for CBT with CA/CY/TBI. Patients with acute myeloid leukaemia or myelodysplastic syndrome, aged 16-55 years, are eligible. The target sample size is 160 and the registration period is 4 years. The primary endpoint is the 2-year disease-free survival rate after CBT. The secondary endpoints are overall survival, relapse, non-relapse mortality, acute and chronic graft-versus-host disease, engraftment rate, time to neutrophil recovery, short-term adverse events, incidence of infections and causes of death.This study employs a single one-to-one web-based randomisation between the with-G-CSF versus without-G-CSF groups after patient registration. Combination of high-dose CA and CY/TBI in both groups is used for conditioning. ETHICS AND DISSEMINATION The study protocol was approved by the central review board, Nagoya University Certified Review Board, after the enforcement of the Clinical Trials Act in Japan. The manuscripts presenting data from this study will be submitted for publication in quality peer-reviewed medical journals. Study findings will be disseminated via presentations at national/international conferences and peer-reviewed journals. TRIAL REGISTRATION NUMBERS UMIN000029947 and jRCTs041180059.
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Affiliation(s)
- Seitaro Terakura
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Takaaki Konuma
- Department of Hematology/Oncology, The Institute of Medical Science The University of Tokyo, Tokyo, Japan
| | - Masatsugu Tanaka
- Department of Hematology, Kanagawa Cancer Center, Yokohama, Japan
| | - Yukiyasu Ozawa
- Department of Hematology and Oncology, Japanese Red Cross Nagoya First Hospital, Nagoya, Japan
| | - Makoto Onizuka
- Department of Hematology and Oncology, Tokai University School of Medicine Graduate School of Medicine, Isehara, Japan
| | - Satoshi Nanno
- Department of Hematology, Osaka City University Graduate School of Medicine School of Medicine, Osaka, Japan
| | - Yasushi Onishi
- Department of Hematology and Rheumatology, Tohoku University Hospital, Sendai, Japan
| | - Nobuyuki Aotsuka
- Division of Hematology-Oncology, Japanese Red Cross Society Narita Hospital, Narita, Japan
| | - Tadakazu Kondo
- Department of Hematology and Oncology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Toshiro Kawakita
- Department of Hematology, National Hospital Organisation Kumamoto Medical Center, Kumamoto, Japan
| | - Jun Kato
- Division of Hematology, Keio University School of Medicine, Tokyo, Japan
| | - Takeshi Kobayashi
- Division of Hematology, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, Japan
| | - Tetsuya Nishida
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Takuhiro Yamaguchi
- Department of Biostatistics, Graduate School of Medicine, Tohoku University, Sendai, Japan
| | - Yachiyo Kuwatsuka
- Department of Advanced Medicine, Nagoya University Hospital, Nagoya, Japan
| | - Satoshi Takahashi
- Department of Hematology/Oncology, The Institute of Medical Science The University of Tokyo, Tokyo, Japan
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Kitoh H, Matsushita M, Mishima K, Nagata T, Kamiya Y, Ueda K, Kuwatsuka Y, Morikawa H, Nakai Y, Ishiguro N. Pharmacokinetics and safety after once and twice a day doses of meclizine hydrochloride administered to children with achondroplasia. PLoS One 2020; 15:e0229639. [PMID: 32282831 PMCID: PMC7153885 DOI: 10.1371/journal.pone.0229639] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 02/10/2020] [Indexed: 11/24/2022] Open
Abstract
Achondroplasia (ACH) is the most common short-limbed skeletal dysplasia caused by activating mutations in the fibroblast growth factor receptor 3 (FGFR3) gene. We identified that meclizine hydrochloride inhibited FGFR3 signaling in various chondrocytic cells and promoted longitudinal bone growth in mouse model of ACH. Meclizine has safely been used for more than 50 years, but it lacks the safety data for repeated administration and pharmacokinetics (PK) when administered to children. We performed a phase Ia study to evaluate the PK and safety of meclizine administered orally to ACH children. Twelve ACH children aged from 5 to younger than 11 years were recruited, and the first 6 subjects received once a day of meclizine in the fasted condition, subsequent 6 subjects received twice a day of meclizine in the fed condition. Meclizine was well tolerated in ACH children with no serious adverse events. The mean Cmax, Tmax, AUC0-24h, t1/2 during 24 hours in the fasted condition were 130 ng/mL, 1.7 hours, 761 ng·h/mL, and 8.5 hours respectively. The simulation of repeated administration of meclizine for 14 days demonstrated that plasma concentration apparently reached steady state around 10 days after the first dose both at once a day and twice a day administration. The AUC0-10h of the fasting and fed condition were 504 ng·h/mL and 813 ng·h/mL, respectively, indicating exposure of meclizine increased with the diet. Although higher drug exposure was confirmed in ACH children compared to adults, a single administration of meclizine seemed to be well tolerated.
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Affiliation(s)
- Hiroshi Kitoh
- Department of Orthopaedic Surgery, Aichi Children’s Health and Medical Center, Obu, Aichi, Japan
- Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Aichi, Japan
- * E-mail:
| | - Masaki Matsushita
- Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Aichi, Japan
| | - Kenichi Mishima
- Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Aichi, Japan
| | - Tadashi Nagata
- Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Aichi, Japan
| | - Yasunari Kamiya
- Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Aichi, Japan
| | - Kohei Ueda
- Department of Advanced Medicine, Nagoya University Hospital, Showa-ku, Nagoya, Aichi, Japan
| | - Yachiyo Kuwatsuka
- Department of Advanced Medicine, Nagoya University Hospital, Showa-ku, Nagoya, Aichi, Japan
| | | | - Yasuhiro Nakai
- Department of Advanced Medicine, Nagoya University Hospital, Showa-ku, Nagoya, Aichi, Japan
| | - Naoki Ishiguro
- Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Aichi, Japan
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