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Kitamura K, Sato N, Nakamura M, Iwawaki Y, Matsui T, Takasato Y, Sugiura S, Matsunaga K, Ito K. Identification of Allergens in Azuki (Adzuki) Bean Allergy. J Investig Allergol Clin Immunol 2024; 34:139-140. [PMID: 37669086 DOI: 10.18176/jiaci.0930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023] Open
Affiliation(s)
- K Kitamura
- Department of Allergy, Allergy and Immunology Center, Aichi Children's Health and Medical Center, Obu, Japan
| | - N Sato
- Department of Integrative Medical Science for Allergic Disease, Fujita Health University School of Medicine, Nagoya, Japan
- General Research and Development Institute, Hoyu Co, Ltd, Nagakute, Japan
| | - M Nakamura
- Department of Integrative Medical Science for Allergic Disease, Fujita Health University School of Medicine, Nagoya, Japan
- General Research and Development Institute, Hoyu Co, Ltd, Nagakute, Japan
| | - Y Iwawaki
- Department of Allergy, Allergy and Immunology Center, Aichi Children's Health and Medical Center, Obu, Japan
| | - T Matsui
- Department of Allergy, Allergy and Immunology Center, Aichi Children's Health and Medical Center, Obu, Japan
| | - Y Takasato
- Department of Allergy, Allergy and Immunology Center, Aichi Children's Health and Medical Center, Obu, Japan
| | - S Sugiura
- Department of Allergy, Allergy and Immunology Center, Aichi Children's Health and Medical Center, Obu, Japan
| | - K Matsunaga
- Department of Integrative Medical Science for Allergic Disease, Fujita Health University School of Medicine, Nagoya, Japan
| | - K Ito
- Department of Allergy, Allergy and Immunology Center, Aichi Children's Health and Medical Center, Obu, Japan
- Department of Integrative Medical Science for Allergic Disease, Fujita Health University School of Medicine, Nagoya, Japan
- Comprehensive Pediatric Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Utsunomiya T, Motomura G, Yamaguchi R, Hamai S, Sato T, Kawahara S, Hara D, Kitamura K, Nakashima Y. Effects of the location of both anterior and lateral boundaries of the necrotic lesion on collapse progression in osteonecrosis of the femoral head. J Orthop Sci 2024; 29:552-558. [PMID: 36797126 DOI: 10.1016/j.jos.2023.01.011] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 01/13/2023] [Accepted: 01/30/2023] [Indexed: 02/18/2023]
Abstract
BACKGROUND The location of the lateral boundary of the necrotic lesion to the weight-bearing portion of the acetabulum (Type classification) is an important factor for collapse in osteonecrosis of the femoral head (ONFH). Recent studies also reported the significance of the location of the anterior boundary of the necrotic lesion on the occurrence of collapse. We aimed to assess the effects of the location of both anterior and lateral boundaries of the necrotic lesion on collapse progression in ONFH. METHODS We recruited 55 hips with post-collapse ONFH from 48 consecutive patients, who were conservatively followed for more than one year. Using a plain lateral radiograph (Sugioka's lateral view), the location of the anterior boundary of the necrotic lesion to the weight-bearing portion of the acetabulum was classified as follows: Anterior-area I (two hips) occupying the medial one-third or less; Anterior-area II (17 hips) occupying the medial two-thirds or less; and Anterior-area III (36 hips) occupying greater than the medial two-thirds. The amount of femoral head collapse was measured by biplane radiographs at the onset of hip pain and each follow-up period, and Kaplan-Meier survival curves with collapse progression (≥1 mm) as the endpoint were produced. The probability of collapse progression was also assessed by the combination of Anterior-area and Type classifications. RESULTS Collapse progression was observed in 38 of the 55 hips (69.0%). The survival rate of hips with Anterior-area III/Type C2 was significantly lower. Among hips with Type B/C1, collapse progression occurred more frequently in hips with Anterior-area III (21 of 24 hips) than in hips with Anterior-area I/II (3 of 17 hips, P < 0.0001). CONCLUSIONS Adding the location of the anterior boundary of the necrotic lesion to Type classification was useful to predict collapse progression especially in hips with Type B/C1.
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Affiliation(s)
- Takeshi Utsunomiya
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | - Goro Motomura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | - Ryosuke Yamaguchi
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | - Satoshi Hamai
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | - Taishi Sato
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | - Shinya Kawahara
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | - Daisuke Hara
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | - Kenji Kitamura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | - Yasuharu Nakashima
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
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Sakai T, Fujii M, Kitamura K, Tanaka H, Mawatari M. Biomechanical Effect of Distal Tibial Oblique Osteotomy: A Preliminary Finite-Element Analysis. Cureus 2024; 16:e53803. [PMID: 38465079 PMCID: PMC10924635 DOI: 10.7759/cureus.53803] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/07/2024] [Indexed: 03/12/2024] Open
Abstract
BACKGROUND The biomechanical effect of distal tibial oblique osteotomy (DTOO) on osteoarthritic ankles has not been investigated. Using finite element (FE) models, we aimed to elucidate the effect of DTOO on the ankle contact pressure (CP) distribution. METHODS This study included two patients with ankle osteoarthritis who underwent DTOO and one asymptomatic control. Patient-specific FE models were reconstructed by matching standing radiographs with supine computed tomography scans. The joint contact area (CA) and maximum CP on the articular surface of the talus were calculated before and after DTOO and compared with those of the control. RESULTS In the control, the CA was 584 mm2 and the maximum CP was 2.6 MPa. In case 1, the CA increased by 125% from 166 mm2 preoperatively to 375 mm2 postoperatively, accompanied by a 36% decrease in the maximum CP from 9.8 MPa to 6.3 MPa. Similarly, in case 2, the CA increased by 46% from 301 mm2 to 439 mm2, accompanied by a 27% decrease in the maximum CP from 6.7 MPa to 4.9 MPa. CONCLUSIONS This study suggests DTOO improves the biomechanics of the ankle, but not sufficiently compared to the control. This analytical approach may enhance understanding of ankle pathophysiology and assist in the design of the ideal corrective osteotomy.
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Affiliation(s)
| | | | - Kenji Kitamura
- Orthopedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, JPN
| | - Hirofumi Tanaka
- Orthopedic Surgery, Hyakutake Orthopedics and Sports Clinic, Saga, JPN
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Kitamura K, Fujii M, Motomura G, Hamai S, Kawahara S, Sato T, Yamaguchi R, Hara D, Utsunomiya T, Kokubu Y, Nakashima Y. The sourcil roundness index is a useful measure for quantifying acetabular concavity asphericity. Sci Rep 2023; 13:15851. [PMID: 37740003 PMCID: PMC10516987 DOI: 10.1038/s41598-023-42630-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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 09/12/2023] [Indexed: 09/24/2023] Open
Abstract
This study aimed to clarify the clinical utility of the sourcil roundness index (SRI), a novel index for quantifying the asphericity of the acetabular concavity, by determining (1) the difference in the SRI between dysplastic and normal hips and (2) the correlation between the SRI and radiographic parameters of hip dysplasia. We reviewed standing anteroposterior pelvic radiographs of 109 dysplastic and 40 normal hips. The SRI was determined as the ratio of the distance from the medial edge of the sourcil to the most concave point of the acetabular sourcil (A) to the distance from the medial to the lateral edge of the sourcil (B). The formula for SRI is (A/B) × 100-50 (%), with an SRI of 0% indicating a perfectly spherical acetabulum, and higher SRI values indicating a more aspherical shape. The median SRI was greater in patients with hip dysplasia than in normal hips (5.9% vs. - 1.4%; p < 0.001). Furthermore, the median SRI was greater in the severe dysplasia subgroup (18.9%) than in the moderate (3.5%) and borderline-to-mild (- 1.3%) dysplasia subgroups (p < 0.05). Quantification of acetabular concavity asphericity by the SRI showed that dysplastic hips had a more lateral acetabular concave point than normal hips, and that the severity of hip dysplasia had an effect on the acetabular concavity asphericity.
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Affiliation(s)
- Kenji Kitamura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Masanori Fujii
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
- Department of Orthopaedic Surgery, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan.
| | - Goro Motomura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Satoshi Hamai
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Shinya Kawahara
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Taishi Sato
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Ryosuke Yamaguchi
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Daisuke Hara
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Takeshi Utsunomiya
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Yasuhiko Kokubu
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Yasuharu Nakashima
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
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Toda T, Kitamura K, Kume K, Yukawa M, Koyano T, Ueno M. The joy of the 11th International Fission Yeast Meeting in Hiroshima (POMBE2023 Hiroshima) after a long wait due to the COVID-19 pandemic. Genes Cells 2023; 28:646-652. [PMID: 37431652 DOI: 10.1111/gtc.13055] [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: 06/13/2023] [Accepted: 06/25/2023] [Indexed: 07/12/2023]
Abstract
The 11th International Fission Yeast Meeting took place at Astel Plaza in Hiroshima, Japan, from May 28th to June 2nd, 2023. This highly anticipated gathering, originally scheduled for May 2021, had been postponed for 2 years due to the COVID-19 pandemic. Researchers from 21 countries, including 211 overseas and 157 domestic participants (overall gender ratio is roughly 60% male vs. 40% female), eagerly awaited the opportunity to meet in person, as virtual interactions had been the only means of communication during this challenging period. The meeting featured four kick-off special lectures, 101 regular talks, and 152 poster presentations. Additionally, a discussion session on upfront frontier research in fission yeast provided an interactive platform for both speakers and attendees. Throughout the event, participants shared cutting-edge knowledge, celebrated significant research findings, and relished the invaluable experience of an in-person meeting. The vibrant and friendly atmosphere, characteristic of this esteemed international conference, fostered collaboration and reinforced the significance of studying this exceptional model organism. Undoubtedly, the outcomes of this meeting will greatly contribute to our understanding of complex biological systems, not only in fission yeast but also in general eukaryotes.
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Affiliation(s)
- Takashi Toda
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
| | - Kenji Kitamura
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
| | - Kazunori Kume
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
- Hiroshima Research Center for Healthy Aging (HiHA), Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
| | - Masashi Yukawa
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
- Hiroshima Research Center for Healthy Aging (HiHA), Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
| | - Takayuki Koyano
- Division of Cell Biology, Shigei Medical Research Institute, Okayama, Japan
| | - Masaru Ueno
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
- Hiroshima Research Center for Healthy Aging (HiHA), Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
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Kokubu Y, Kawahara S, Kitamura K, Hamai S, Motomura G, Ikemura S, Sato T, Yamaguchi R, Hara D, Fujii M, Nakashima Y. Evaluation of the anterior acetabular coverage with a false profile radiograph considering appropriate range of positioning. Sci Rep 2023; 13:8288. [PMID: 37217756 DOI: 10.1038/s41598-023-35514-9] [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: 12/10/2022] [Accepted: 05/19/2023] [Indexed: 05/24/2023] Open
Abstract
This study aimed to (1) set a reference value for anterior center edge angle (ACEA) for preoperative planning of periacetabular osteotomy (PAO), (2) investigate the effects of pelvic rotation and inclination from false profile (FP) radiographs on the measured ACEA, and (3) determine the "appropriate range of positioning" for FP radiograph. This single-centered, retrospective study analyzed 61 patients (61 hips) who underwent PAO from April 2018 and May 2021. ACEA was measured in each digitally reconstructed radiography (DRR) image of the FP radiograph reconstructed in different degrees of pelvic rotation. Detailed simulations were performed to determine the "appropriate range of positioning" (0.67 < ratio of the distance between the femoral heads to the diameter of the femoral head < 1.0). The vertical-center-anterior (VCA) angle was measured on the CT sagittal plane considering the patient-specific standing positions, and its correlation with the ACEA was investigated. The reference value of ACEA was determined by receiver operating characteristic (ROC) curve analysis. The ACEA measurement increased by 0.35° for every 1° pelvic rotation approaching the true lateral view. The pelvic rotation with the "appropriate range of positioning" was found at 5.0° (63.3-68.3°). The ACEA on the FP radiographs showed a good correlation with the VCA angle. The ROC curve revealed that an ACEA < 13.6° was associated with inadequate anterior coverage (VCA < 32°). Our findings suggest that during preoperative PAO planning, an ACEA < 13.6° on FP radiographs indicates insufficient anterior acetabular coverage. Images with the "appropriate positioning" can also have a measurement error of 1.7° due to the pelvic rotation.
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Affiliation(s)
- Yasuhiko Kokubu
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Shinya Kawahara
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan.
| | - Kenji Kitamura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Satoshi Hamai
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
- Department of Medical-Engineering Collaboration for Healthy Longevity, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Goro Motomura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Satoshi Ikemura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Taishi Sato
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Ryosuke Yamaguchi
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Daisuke Hara
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Masanori Fujii
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
- Department of Orthopaedic Surgery, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Yasuharu Nakashima
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
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Islam ATMR, Shinzato K, Miyaoka H, Komaguchi K, Koike K, Arakawa K, Kitamura K, Tanaka N. Isolation and characterization of blackish-brown BY2-melanin accumulated in cultured tobacco BY-2 cells. Biosci Biotechnol Biochem 2023; 87:395-410. [PMID: 36592962 DOI: 10.1093/bbb/zbac214] [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: 10/29/2022] [Accepted: 12/21/2022] [Indexed: 01/04/2023]
Abstract
The tobacco BY-2 cell line is one of the most utilized plant cell lines. After long-term culture, the cells turn brown to black, but the causal pigment is unknown. We successfully isolated a blackish-brown pigment from BY-2 cells cultured for 3 weeks. Morphological and spectroscopic analyses indicated that the pigment had similar features to a melanin-like substance reported previously. Furthermore, physicochemical analyses revealed that this pigment possessed most of the properties of melanin-like pigments. In addition, the high nitrogen content suggested that it differed from common plant melanins classified as allomelanins, suggesting a novel eumelanin-like pigment: "BY2-melanin". This is the first example showing that eumelanin-like pigments are produced in the cultures of plant cells for which the accumulation of melanin has not been reported. This tobacco BY-2 cell culture technique may represent a customizable and sustainable alternative to conventional melanin production platforms, with significant potential for industrial and pharmacological applications.
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Affiliation(s)
- Abul Taher Mohammed Rafiqul Islam
- Genome Biotechnology, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
- Department of Botany, Faculty of Biosciences, University of Barishal, Barishal 8254, Bangladesh
| | - Keita Shinzato
- Advanced Materials Division, Natural Science Center for Basic Research and Development, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
| | - Hiroki Miyaoka
- Advanced Materials Division, Natural Science Center for Basic Research and Development, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
| | - Kenji Komaguchi
- Materials Analytical Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
| | - Kanae Koike
- Facility Management Division, Natural Science Center for Basic Research and Development, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
| | - Kenji Arakawa
- Cell Biochemistry, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
| | - Kenji Kitamura
- Genome Biotechnology, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
- Department of Gene Science, Natural Science Center for Basic Research and Development, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
| | - Nobukazu Tanaka
- Genome Biotechnology, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
- Department of Gene Science, Natural Science Center for Basic Research and Development, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
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8
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Nakashima Y, Hara D, Ohishi M, Motomura G, Kawano I, Hamai S, Kawahara S, Sato T, Yamaguchi R, Utsunomiya T, Kitamura K. Abductor recovery after muscle-sparing periacetabular osteotomy using a lateral approach. J Hip Preserv Surg 2022; 9:259-264. [PMID: 36908558 PMCID: PMC9993449 DOI: 10.1093/jhps/hnac047] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 10/23/2022] [Accepted: 11/01/2022] [Indexed: 12/15/2022] Open
Abstract
To decrease hip abductor dysfunction after periacetabular osteotomy using a lateral/trochanteric approach, we aimed to modify transposition osteotomy of the acetabulum (TOA) to not cut the greater trochanter and abductor-iliac crest detachment. We subsequently compared abductor muscle strength recovery between TOAs with [conventional TOA (C-TOA)] and without [modified TOA (M-TOA)] trochanteric osteotomy. C-TOA and M-TOA were performed in 27 and 34 hips, respectively. Hip abduction, flexion and knee extension muscle strength were measured preoperatively and at 3, 5, 10, 24 and 52 weeks postoperatively. The muscle strength ratio of the affected and contralateral lower limbs was compared between the C-TOA and M-TOA groups. Neither the mean Merle d'Aubigné-Postel score at the final follow-up nor the postoperative center-edge angle showed significant differences between the M-TOA and C-TOA groups (15.7 versus 16.4 points; P = 0.25 and 38.5° versus P = 0.62 and 39.8°, respectively). The mean muscle strength ratios of hip abduction at 5, 12 and 24 weeks postoperatively were significantly higher in the M-TOA group than in the C-TOA group (0.62 versus 0.39, 0.76 versus 0.59 and 0.94 versus 0.70; P = 0.03, 0.04 and 0.01, respectively). There were no significant differences between groups at Postoperative Week 52 (P = 0.36). Discomfort at the greater trochanter was observed in 18 hips (66.7%) in the C-TOA group but only in 4 hips (11.2%) in the M-TOA group. In conclusion, M-TOA is less invasive than C-TOA and allows an earlier recovery of abductor muscle strength without significant correction loss.
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Affiliation(s)
- Yasuharu Nakashima
- Department of Orthopaedic Surgery, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Daisuke Hara
- Department of Orthopaedic Surgery, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Masanobu Ohishi
- Department of Orthopaedic Surgery, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.,Department of Orthopaedic Surgery, Chihaya Hospital, 2-30-1 Chihaya, Higashi-ku, Fukuoka 813-8501, Japan
| | - Goro Motomura
- Department of Orthopaedic Surgery, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Ichiro Kawano
- Department of Rehabilitation Medicine, Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Satoshi Hamai
- Department of Orthopaedic Surgery, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.,Department of Medical-Engineering Collaboration for Healthy Longevity, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Shinya Kawahara
- Department of Orthopaedic Surgery, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Taishi Sato
- Department of Orthopaedic Surgery, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Ryosuke Yamaguchi
- Department of Orthopaedic Surgery, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.,Department of Rehabilitation Medicine, Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Takeshi Utsunomiya
- Department of Orthopaedic Surgery, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Kenji Kitamura
- Department of Orthopaedic Surgery, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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9
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Kitamura K, Fujii M, Ikemura S, Hamai S, Motomura G, Nakashima Y. Factors Associated With Abnormal Joint Contact Pressure After Periacetabular Osteotomy: A Finite-Element Analysis. J Arthroplasty 2022; 37:2097-2105.e1. [PMID: 35526756 DOI: 10.1016/j.arth.2022.04.045] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 04/16/2022] [Accepted: 04/29/2022] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Identifying factors associated with poor hip contact mechanics after periacetabular osteotomy (PAO) may help surgeons optimize acetabular corrections in individual patients. We performed individual-specific finite-element analyses to identify preoperative morphological and surgical correction factors for abnormal contact pressure (CP) after PAO. METHODS We performed finite-element analyses before and after PAO with reference to the standing pelvic position on individual-specific 3-dimensional hip models created from computed tomography images of 51 dysplastic hips. Nonlinear contact analyses were performed to calculate the joint CP of the acetabular cartilage during a single-leg stance. RESULTS The maximum CP decreased in 50 hips (98.0%) after PAO compared to preoperative values, and the resulting maximum CP was within the normal range (<4.1 MPa) in 33 hips (64.7%). Multivariate analysis identified the roundness index of the femoral head (P = .002), postoperative anterior center-edge angle (CEA; P = .004), and surgical correction of lateral CEA (Δlateral CEA; P = .003) as independent predictors for abnormal CP after PAO. A preoperative roundness index >54.3°, a postoperative anterior CEA <36.3°, and a Δlateral CEA >27.0° in the standing pelvic position predicted abnormal CP after PAO. CONCLUSION PAO normalized joint CP in 64.7% of the patients but was less likely to normalize joint CP in patients with aspheric femoral heads. Successful surgical treatment depends on obtaining adequate anterior coverage and avoiding excessive lateral correction, while considering the physiological pelvic tilt in a weight-bearing position.
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Affiliation(s)
- Kenji Kitamura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masanori Fujii
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan; Department of Orthopaedic Surgery, Faculty of Medicine, Saga University, Saga, Japan
| | - Satoshi Ikemura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Satoshi Hamai
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Goro Motomura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yasuharu Nakashima
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Nakashima Y, Ishibashi S, Kitamura K, Yamate S, Motomura G, Hamai S, Ikemura S, Fujii M. 20-year hip survivorship and patient-reported outcome measures after transpositional osteotomy of the acetabulum for dysplastic hips. Bone Joint J 2022; 104-B:767-774. [PMID: 35775172 DOI: 10.1302/0301-620x.104b7.bjj-2021-1767.r1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
AIMS Although periacetabular osteotomies are widely used for the treatment of symptomatic dysplastic hips, long-term surgical outcomes and patient-reported outcome measures (PROMs) are still unclear. Accordingly, we assessed hip survival and PROMs at 20 years after transpositional osteotomy of the acetabulum (TOA). METHODS A total of 172 hips in 159 patients who underwent TOA were followed up at a mean of 21.02 years (16.6 to 24.6) postoperatively. Kaplan-Meier analysis was used to assess survivorship with an endpoint of total hip arthroplasty (THA). PROMs included the visual analogue scale (VAS) Satisfaction, VAS Pain, Oxford Hip Score (OHS), and Forgotten Joint Score-12 (FJS-12). Thresholds for favourable outcomes for OHS (≥ 42) and FJS-12 (≥ 51) were obtained using the receiver operating characteristic curve with VAS Satisfaction ≥ 50 and VAS Pain < 20 as anchors. RESULTS THA was performed on 37 hips (21.5%) by the latest follow-up. Kaplan-Meier analysis indicated that the hip survival rate at 20 years was 79.7% (95% confidence interval (CI) 73.7 to 86.3). Multivariate analysis showed that preoperative Tönnis grade significantly influenced hip survival. Tönnis grades 0, 1, and 2 were associated with 20-year survival rates of 93.3% (95% CI 84.8 to 100), 86.7% (95% CI 79.8 to 94.3), and 54.8% (95% CI 41.5 to 72.3), respectively. More than 60% of the patients exhibited favourable PROMs. An advanced Tönnis grade at the latest follow-up and a higher BMI were both significantly associated with unfavourable OHS, but not with other PROMs. CONCLUSION This study demonstrated the durability of TOA for hips with Tönnis grades 0 to 1 at 20 years. While the presence of advanced osteoarthritis and higher BMI was associated with lower hip functions (OHS), it was not necessarily associated with worse patient satisfaction and joint awareness. Cite this article: Bone Joint J 2022;104-B(7):767-774.
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Affiliation(s)
- Yasuharu Nakashima
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Shojiro Ishibashi
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kenji Kitamura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Satoshi Yamate
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Goro Motomura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Satoshi Hamai
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Satoshi Ikemura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masanori Fujii
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.,Department of Orthopaedic Surgery, Faculty of Medicine, Saga University, Saga, Japan
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Kitamura K, Fujii M, Iwamoto M, Ikemura S, Hamai S, Motomura G, Nakashima Y. Effect of coronal plane acetabular correction on joint contact pressure in Periacetabular osteotomy: a finite-element analysis. BMC Musculoskelet Disord 2022; 23:48. [PMID: 35031030 PMCID: PMC8760799 DOI: 10.1186/s12891-022-05005-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 01/07/2022] [Indexed: 11/26/2022] Open
Abstract
Background The ideal acetabular position for optimizing hip joint biomechanics in periacetabular osteotomy (PAO) remains unclear. We aimed to determine the relationship between acetabular correction in the coronal plane and joint contact pressure (CP) and identify morphological factors associated with residual abnormal CP after correction. Methods Using CT images from 44 patients with hip dysplasia, we performed three patterns of virtual PAOs on patient-specific 3D hip models; the acetabulum was rotated laterally to the lateral center-edge angles (LCEA) of 30°, 35°, and 40°. Finite-element analysis was used to calculate the CP of the acetabular cartilage during a single-leg stance. Results Coronal correction to the LCEA of 30° decreased the median maximum CP 0.5-fold compared to preoperatively (p < 0.001). Additional correction to the LCEA of 40° further decreased CP in 15 hips (34%) but conversely increased CP in 29 hips (66%). The increase in CP was associated with greater preoperative extrusion index (p = 0.030) and roundness index (p = 0.038). Overall, virtual PAO failed to normalize CP in 11 hips (25%), and a small anterior wall index (p = 0.049) and a large roundness index (p = 0.003) were associated with residual abnormal CP. Conclusions The degree of acetabular correction in the coronal plane where CP is minimized varied among patients. Coronal plane correction alone failed to normalize CP in 25% of patients in this study. In patients with an anterior acetabular deficiency (anterior wall index < 0.21) and an aspherical femoral head (roundness index > 53.2%), coronal plane correction alone may not normalize CP. Further studies are needed to clarify the effectiveness of multiplanar correction, including in the sagittal and axial planes, in optimizing the hip joint’s contact mechanics.
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Affiliation(s)
- Kenji Kitamura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Masanori Fujii
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan. .,Department of Orthopaedic Surgery, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan.
| | - Miho Iwamoto
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Satoshi Ikemura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Satoshi Hamai
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Goro Motomura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Yasuharu Nakashima
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
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Kitamura K, Fujii M, Iwamoto M, Ikemura S, Hamai S, Motomura G, Nakashima Y. Is Anterior Rotation of the Acetabulum Necessary to Normalize Joint Contact Pressure in Periacetabular Osteotomy? A Finite-element Analysis Study. Clin Orthop Relat Res 2022; 480:67-78. [PMID: 34228657 PMCID: PMC8673984 DOI: 10.1097/corr.0000000000001893] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [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: 12/31/2020] [Accepted: 06/11/2021] [Indexed: 01/31/2023]
Abstract
BACKGROUND Inappropriate sagittal plane correction can result in an increased risk of osteoarthritis progression after periacetabular osteotomy (PAO). Individual and postural variations in sagittal pelvic tilt, along with acetabular deformity, affect joint contact mechanics in dysplastic hips and may impact the direction and degree of acetabular correction. Finite-element analyses that account for physiologic pelvic tilt may provide valuable insight into the effect of PAO on the contact mechanics of dysplastic hips, which may lead to improved acetabular correction during PAO. QUESTIONS/PURPOSES We performed virtual PAO using finite-element models with reference to the standing pelvic position to clarify (1) whether lateral rotation of the acetabulum normalizes the joint contact pressure, (2) risk factors for abnormal contact pressure after lateral rotation of the acetabulum, and (3) whether additional anterior rotation of the acetabulum further reduces contact pressure. METHODS Between 2016 and 2020, 85 patients (92 hips) underwent PAO to treat hip dysplasia. Eighty-two patients with hip dysplasia (lateral center-edge angle < 20°) were included. Patients with advanced osteoarthritis, femoral head deformity, prior hip or spine surgery, or poor-quality images were excluded. Thirty-eight patients (38 hips) were eligible to participate in this study. All patients were women, with a mean age of 39 ± 10 years. Thirty-three women volunteers without a history of hip disease were reviewed as control participants. Individuals with a lateral center-edge angle < 25° or poor-quality images were excluded. Sixteen individuals (16 hips) with a mean age of 36 ± 7 years were eligible as controls. Using CT images, we developed patient-specific three-dimensional surface hip models with the standing pelvic position as a reference. The loading scenario was based on single-leg stance. Four patterns of virtual PAO were performed in the models. First, the acetabular fragment was rotated laterally in the coronal plane so that the lateral center-edge angle was 30°; then, anterior rotation in the sagittal plane was added by 0°, 5°, 10°, and 15°. We developed finite-element models for each acetabular position and performed a nonlinear contact analysis to calculate the joint contact pressure of the acetabular cartilage. The normal range of the maximum joint contact pressure was calculated to be < 4.1 MPa using a receiver operating characteristic curve. A paired t-test or Wilcoxon signed rank test with Bonferroni correction was used to compare joint contact pressures among acetabular positions. We evaluated the association of joint contact pressure with the patient-specific sagittal pelvic tilt and acetabular version and coverage using Pearson or Spearman correlation coefficients. An exploratory univariate logistic regression analysis was performed to identify which of the preoperative factors (CT measurement parameters and sagittal pelvic tilt) were associated with abnormal contact pressure after lateral rotation of the acetabulum. Variables with p values < 0.05 (anterior center-edge angle and sagittal pelvic tilt) were included in a multivariable model to identify the independent influence of each factor. RESULTS Lateral rotation of the acetabulum decreased the median maximum contact pressure compared with that before virtual PAO (3.7 MPa [range 2.2-6.7] versus 7.2 MPa [range 4.1-14 MPa], difference of medians 3.5 MPa; p < 0.001). The resulting maximum contact pressures were within the normal range (< 4.1 MPa) in 63% of the hips (24 of 38 hips). The maximum contact pressure after lateral acetabular rotation was negatively correlated with the standing pelvic tilt (anterior pelvic plane angle) (ρ = -0.52; p < 0.001) and anterior center-edge angle (ρ = -0.47; p = 0.003). After controlling for confounding variables such as the lateral center-edge angle and sagittal pelvic tilt, we found that a decreased preoperative anterior center-edge angle (per 1°; odds ratio 1.14 [95% CI 1.01-1.28]; p = 0.01) was independently associated with elevated contact pressure (≥ 4.1 MPa) after lateral rotation; a preoperative anterior center-edge angle < 32° in the standing pelvic position was associated with elevated contact pressure (sensitivity 57%, specificity 96%, area under the curve 0.77). Additional anterior rotation further decreased the joint contact pressure; the maximum contact pressures were within the normal range in 74% (28 of 38 hips), 76% (29 of 38 hips), and 84% (32 of 38 hips) of the hips when the acetabulum was rotated anteriorly by 5°, 10°, and 15°, respectively. CONCLUSION Via virtual PAO, normal joint contact pressure was achieved in 63% of patients by normalizing the lateral acetabular coverage. However, lateral acetabular rotation was insufficient to normalize the joint contact pressure in patients with more posteriorly tilted pelvises and anterior acetabular deficiency. In patients with a preoperative anterior center-edge angle < 32° in the standing pelvic position, additional anterior rotation is expected to be a useful guide to normalize the joint contact pressure. CLINICAL RELEVANCE This virtual PAO study suggests that biomechanics-based planning for PAO should incorporate not only the morphology of the hip but also the physiologic pelvic tilt in the weightbearing position in order to customize acetabular reorientation for each patient.
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Affiliation(s)
- Kenji Kitamura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masanori Fujii
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Miho Iwamoto
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Satoshi Ikemura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Satoshi Hamai
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Goro Motomura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yasuharu Nakashima
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Fujii M, Kitamura K, Ikemura S, Hamai S, Motomura G, Nakashima Y. Pneumatic femoral broaching decreases post-operative subsidence of a cementless taper-wedge stem. Int Orthop 2021; 46:233-240. [PMID: 34448924 DOI: 10.1007/s00264-021-05196-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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 08/15/2021] [Indexed: 11/30/2022]
Abstract
PURPOSE Stem subsidence is a known cause of early failure in cementless total hip arthroplasty (THA). The aim of this study was to determine the usefulness of pneumatic femoral broaching in preventing post-operative subsidence of a proximally porous-coated, taper-wedge stem. METHODS We reviewed 169 cases of primary THA with a single taper-wedge stem. Eighty THAs performed using pneumatic broaching were compared with 89 THAs performed using manual broaching in terms of postoperative canal fill ratio (CFR) at three levels, stem subsidence at one year post-operation, and stem fixation at latest follow-up (median, 24 months). RESULTS The median CFRs were higher in the pneumatic group than in the manual group at all levels (p < 0.05). The median stem subsidence at one year after THA was lower in the pneumatic group than in the manual group (0.2 mm vs. 0.6 mm, p = 0.007). A multivariate analysis determined a decreased CFR at 60 mm below the lesser trochanter and the manual broaching as independent factors affecting post-operative stem subsidence. At the latest follow-up, all stems showed stable fixation by bone ingrowth in both groups. CONCLUSION Our results showed that the pneumatic broaching device was useful in maximizing the mediolateral canal filling and initial stability and minimizing the subsidence of taper-wedge stems.
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Affiliation(s)
- Masanori Fujii
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi. Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Kenji Kitamura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi. Higashi-ku, Fukuoka, 812-8582, Japan
| | - Satoshi Ikemura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi. Higashi-ku, Fukuoka, 812-8582, Japan
| | - Satoshi Hamai
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi. Higashi-ku, Fukuoka, 812-8582, Japan
| | - Goro Motomura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi. Higashi-ku, Fukuoka, 812-8582, Japan
| | - Yasuharu Nakashima
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi. Higashi-ku, Fukuoka, 812-8582, Japan
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Kitamura K, Fujii M, Ikemura S, Hamai S, Motomura G, Nakashima Y. Does Patient-specific Functional Pelvic Tilt Affect Joint Contact Pressure in Hip Dysplasia? A Finite-element Analysis Study. Clin Orthop Relat Res 2021; 479:1712-1724. [PMID: 33787527 PMCID: PMC8277263 DOI: 10.1097/corr.0000000000001737] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [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: 08/14/2020] [Accepted: 02/23/2021] [Indexed: 01/31/2023]
Abstract
BACKGROUND Although individual and postural variations in the physiologic pelvic tilt affect the acetabular orientation and coverage in patients with hip dysplasia, their effect on the mechanical environment in the hip has not been fully understood. Individual-specific, finite-element analyses that account for physiologic pelvic tilt may provide valuable insight into the contact mechanics of dysplastic hips, which can lead to further understanding of the pathogenesis and improved treatment of this patient population. QUESTION/PURPOSE We used finite-element analysis to ask whether there are differences between patients with hip dysplasia and patients without dysplasia in terms of (1) physiologic pelvic tilt, (2) the pelvic position and joint contact pressure, and (3) the morphologic factors associated with joint contact pressure. METHODS Between 2016 and 2019, 82 patients underwent pelvic osteotomy to treat hip dysplasia. Seventy patients with hip dysplasia (lateral center-edge angle ≥ 0° and < 20° on supine AP pelvic radiographs) were included. Patients with advanced osteoarthritis, femoral head deformity, prior hip or supine surgery, or poor-quality imaging were excluded. Thirty-two patients (32 hips) were eligible to this finite-element analysis study. For control groups, we reviewed 33 female volunteers without a history of hip disease. Individuals with frank or borderline hip dysplasia (lateral center-edge angle < 25°) or poor-quality imaging were excluded. Sixteen individuals (16 hips) were eligible as controls. Two board-certified orthopaedic surgeons measured sagittal pelvic tilt (the angle between the anterior pelvic plane and vertical axis: anterior pelvic plane [APP] angle) and acetabular version and coverage using pelvic radiographs and CT images. Intra- and interobserver reliabilities, evaluated using the kappa value and intraclass correlation coefficient, were good or excellent. We developed individual-specific, finite-element models using pelvic CT images, and performed nonlinear contact analysis to calculate the joint contact pressure on the acetabular cartilage during the single-leg stance with respect to three pelvic positions: standardized (anterior pelvic plane), supine, and standing. We compared physiologic pelvic tilt between patients with and without dysplasia using a t-test or the Wilcoxon rank sum test. A paired t-test or the Wilcoxon signed rank test with a Bonferroni correction was used to compare joint contact pressure between the three pelvic positions. We correlated joint contact pressure with morphologic parameters and pelvic tilt using the Pearson or the Spearman correlation coefficients. RESULTS The APP angle in the supine and standing positions varied widely among individuals. It was greater in patients with hip dysplasia than in patients in the control group when in the standing position (3° ± 6° versus -2° ± 8°; mean difference 5° [95% CI 1° to 9°]; p = 0.02) but did not differ between the two groups when supine (8° ± 5° versus 5° ± 7°; mean difference 3° [95% CI 0° to 7°]; p = 0.06). The mean pelvic tilt was 6° ± 5° posteriorly when shifting from the supine to the standing position in patients with hip dysplasia. The median (range) maximum contact pressure was higher in dysplastic hips than in control individuals (in standing position; 7.3 megapascals [MPa] [4.1 to 14] versus 3.5 MPa [2.2 to 4.4]; difference of medians 3.8 MPa; p < 0.001). The median maximum contact pressure in the standing pelvic position was greater than that in the supine position in patients with hip dysplasia (7.3 MPa [4.1to 14] versus 5.8 MPa [3.5 to 12]; difference of medians 1.5 MPa; p < 0.001). Although the median maximum joint contact pressure in the standardized pelvic position did not differ from that in the standing position (7.4 MPa [4.3 to 15] versus 7.3 MPa [4.1 to 14]; difference of medians -0.1 MPa; p > 0.99), the difference in the maximum contact pressure varied from -3.3 MPa to 2.9 MPa, reflecting the wide range of APP angles (mean 3° ± 6° [-11° to 14°]) when standing. The maximum joint contact pressure in the standing position was negatively correlated with the standing APP angle (r = -0.46; p = 0.008) in patients with hip dysplasia. CONCLUSION Based on our findings that individual and postural variations in the physiologic pelvic tilt affect joint contact pressure in the hip, future studies on the pathogenesis of hip dysplasia and joint preservation surgery should not only include the supine or standard pelvic position, but also they need to incorporate the effect of the patient-specific pelvic tilt in the standing position on the biomechanical environment of the hip. CLINICAL RELEVANCE We recommend assessing postural change in sagittal pelvic tilt when diagnosing hip dysplasia and planning preservation hip surgery because assessment in a supine or standard pelvic position may overlook alterations in the hip's contact mechanics in the weightbearing positions. Further studies are needed to elucidate the effect of patient-specific functional pelvic tilt on the degeneration process of dysplastic hips, the acetabular reorientation maneuver, and the clinical result of joint preservation surgery.
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Affiliation(s)
- Kenji Kitamura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masanori Fujii
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Satoshi Ikemura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Satoshi Hamai
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Goro Motomura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yasuharu Nakashima
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Fujii M, Nakashima Y, Kitamura K, Motomura G, Hamai S, Ikemura S, Noguchi Y. Preoperative Rather Than Postoperative Intra-Articular Cartilage Degeneration Affects Long-Term Survivorship of Periacetabular Osteotomy. Arthroscopy 2021; 37:2112-2122. [PMID: 33581297 DOI: 10.1016/j.arthro.2021.01.060] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 01/27/2021] [Accepted: 01/27/2021] [Indexed: 02/02/2023]
Abstract
PURPOSE To determine whether intra-articular lesions changed in short-term follow-up after periacetabular osteotomy (PAO) and whether the intra-articular lesion changes impacted the long-term survivorship of PAO. METHODS We reviewed patients with hip dysplasia who underwent PAO with arthroscopic observation between 1990 and 2001. Patients who underwent second-look arthroscopy were included. The correlations between the intra-articular lesion changes and the long-term outcome of PAO were analyzed for patients with >10 years of follow-up. The possible risk factors included demographic factors (age, sex, and body mass index), radiographic factors (Tönnis grade, lateral center-edge angle, Tönnis angle, acetabular head index, crossover sign, posterior wall sign, and joint congruity), and arthroscopic findings (full-thickness lesions at the time of PAO and lesions changes at the time of second-look arthroscopy). RESULTS A total of 64 patients (72 hips) were studied. Second-look arthroscopy was performed at a median of 1.4 years after PAO. Intra-articular lesions were observed in 93% in the acetabulum, 81% in the femoral head, and 97% in the labrum, respectively. These lesions unchanged in 74% in the acetabulum, 76% in the femoral head, and 79% in the labrum, respectively. Cartilage repair was observed in the acetabulum and the femoral head in 24% and 17% of hips, respectively. Labral repair occurred in 10%. Intra-articular lesion changes were not a predictor of failure. Multivariate analysis identified International Cartilage Repair Society grade 4 lesion in the femoral head as an independent risk factor for failure. CONCLUSIONS Our results suggest that PAO prevents further deterioration in mild cartilage lesions and results in cartilage repair in some cases with advanced cartilage degenerations in the short term. However, these postoperative changes were not associated with long-term survivorship. Thus, appropriate surgical indications based on the preoperative intra-articular cartilage degeneration is paramount to achieving long-term success in PAO. LEVEL OF EVIDENCE Level IV, therapeutic study.
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Affiliation(s)
- Masanori Fujii
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University.
| | - Yasuharu Nakashima
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University
| | - Kenji Kitamura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University
| | - Goro Motomura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University
| | - Satoshi Hamai
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University
| | - Satoshi Ikemura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University
| | - Yasuo Noguchi
- Department of Orthopaedic Surgery, Fukuoka Hoeikai Hospital, Fukuoka, Japan
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Shimura H, Manita S, Mochizuki T, Matsuda Y, Ihara T, Kira S, Mitsui T, Kitamura K, Takeda M. Therapeutic potential of cell-type selective optogenetics for a mouse model with urinary frequency. Eur Urol 2021. [DOI: 10.1016/s0302-2838(21)00406-1] [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: 11/26/2022]
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Iwamoto M, Fujii M, Komiyama K, Sakemi Y, Shiomoto K, Kitamura K, Yamaguchi R, Nakashima Y. Is lateral acetabular rotation sufficient to correct anterolateral deficiency in periacetabular reorientation osteotomy? A CT-Based simulation study. J Orthop Sci 2020; 25:1008-1014. [PMID: 32035753 DOI: 10.1016/j.jos.2019.12.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 11/27/2019] [Accepted: 12/28/2019] [Indexed: 02/09/2023]
Abstract
BACKGROUND Residual acetabular deficiency after periacetabular reorientation osteotomy can result in suboptimal outcome. The optimal algorithm of acetabular fragment correction to achieve normal anterolateral acetabular coverage is not well characterized. The aim of this study was to determine the prevalence of residual anterolateral deficiency after lateral acetabular rotation and to evaluate the ability of additional sagittal and axial rotation of the acetabulum to normalize the acetabular coverage in periacetabular osteotomy. METHODS We performed computed tomography-based simulated periacetabular osteotomy on 85 patients (85 hips) with hip dysplasia. The acetabular fragment was rotated laterally to achieve a lateral center-edge angle (CEA) of 30°. For hips with residual anterolateral deficiency, which were identified based on the reference interval of the anterior CEA, the acetabulum was further rotated in the sagittal or axial direction in 5-degree increments from 5° to 20°, and the ability of these two manoeuvres to restore a normal anterior CEA was assessed. RESULTS After lateral acetabular rotation, 16 hips (19%) had residual anterolateral deficiency, 67 hips (79%) had normal acetabular coverage, and 2 hips (2.4%) had acetabular overcoverage. A preoperative anterior CEA <37° predicted residual deficiency (sensitivity, 94%; specificity, 81%). Additional anterior sagittal rotation was more effective than posterior axial rotation in normalizing the anterior CEA, while minimizing the decrease in posterior CEA. The highest number of hips with normal anterior and posterior CEA was noted at 10° sagittal rotation (81%), which was followed by 15° sagittal rotation (63%). CONCLUSIONS Normal anterolateral coverage was achieved in 79% of patients after rotating the acetabulum laterally. However, lateral rotation of the acetabulum may be insufficient to correct the anterolateral deficiency in patients with an anterior CEA of <37°. In them, additional 10°-15° anterior sagittal rotation may be appropriate to achieve sufficient anterolateral coverage while retaining posterolateral coverage.
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Affiliation(s)
- Miho Iwamoto
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Masanori Fujii
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | - Keisuke Komiyama
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Yuta Sakemi
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Kyohei Shiomoto
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Kenji Kitamura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Ryosuke Yamaguchi
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Yasuharu Nakashima
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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Niida T, Isoda K, Kitamura K, Okabayashi Y, Kadoguchi T, Ohtomo F, Shimada K. Blocking of interleukin-1 suppresses both angiotensin II-induced renal inflammation and hypertension. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3752] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Clinical hypertension is associated with renal inflammation and elevated circulating levels of proinflammatory cytokines. IL-1 receptor antagonist (IL-1Ra) is one of the most important anti-inflammatory cytokines and plays a crucial role in inflammation. Inhibition of IL-1 may contribute to modulation of the Angiotensin II (AngII)-induced hypertension response. This study aimed to elucidate the effects of IL-1Ra and anti-IL-1beta antibody (01BSUR) on AngII-induced hypertension and renal inflammation.
Methods and results
To determine the contribution of IL-1Ra to AngII-induced renal inflammation, male wild-type (WT) and IL-1Ra-deficient (IL-1Ra−/−) mice were infused with AngII (1000ng/kg/min) using subcutaneous osmotic pumps for 14 days. We checked blood pressure, histological change, and several mRNA expressions 14 days after infusion. Fourteen days after infusion, systolic blood pressure (197±5 vs 169±9 mmHg, p<0.05) in IL-1Ra−/− mice significantly increased compared with WT mice. Furthermore, on day 14 of AngII infusion, plasma IL-6 was 5.9-fold higher in IL-1Ra−/− versus WT mice (p<0.001); renal preproendothelin-1 mRNA expression was also significantly higher in IL-1Ra−/− mice (p<0.05). To examine renal function, we analyzed 24-hour urinary protein excretion and serum levels of blood urea nitrogen, creatinine, and uric acid in IL-1Ra−/− and WT mice. On day 14 of Ang II infusion, all levels increased significantly in IL-1Ra−/− mice compared with WT mice, suggesting that IL-1Ra deficiency reduced renal function following Ang II infusion. In addition, renal histology revealed that glomerular injury (Figure upper panels: PAS staining) and tubulointerstitial fibrosis (Figure lower panels: Elastica Masson staining) increased significantly in Ang II-infused IL-1Ra−/− versus Ang II-infused WT mice. Finally, we administrated 01BSUR to both IL-1Ra−/− and WT mice, and 01BSUR treatment decreased AngII-induced hypertension (162±17 vs 204±6 mmHg, p<0.05) and renal damage (glomerular injury and fibrosis of the tubulointerstitial area) in both IL-1Ra−/− and WT mice compared with IgG2a treatment. These findings suggest that 01BSUR suppresses Ang II-induced inflammation and renal injury.
Conclusions
Inhibition of interleukin-1 by both endogenous IL-1Ra and exogenous 01BSUR decreased AngII-induced hypertension and renal damage in mice, suggesting suppression of IL-1 may provide an additional strategy to protect against renal damage in hypertensive patients.
Funding Acknowledgement
Type of funding source: Public grant(s) – National budget only. Main funding source(s): JSPS KAKENHI
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Affiliation(s)
- T Niida
- Kashiwa Kousei General Hospital, Chiba, Japan, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - K Isoda
- Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - K Kitamura
- Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Y Okabayashi
- Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - T Kadoguchi
- Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - F Ohtomo
- Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - K Shimada
- Juntendo University Graduate School of Medicine, Tokyo, Japan
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20
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Kitamura K. 175TF Design and Integration of an Emergency Medicine Focused Interpersonal Skills Simulation Curriculum. Ann Emerg Med 2020. [DOI: 10.1016/j.annemergmed.2020.09.187] [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]
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Kitamura K, Terato K, Fukai R, Katayama K, Waritani T, Shionoya H. THU0066 DOES PORPHYROMONAS GINGIVALLIS MODULATE GUT MICROBIOME RESULTING IN AGGRAVATION OF DISEASE ACTIVITY IN RHEUMATOID ARTHRITIS? Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.1368] [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: 11/03/2022]
Abstract
Background:Oral Porphyromonas gingivalis (Pg) infection in rheumatoid arthritis (RA) model revealed aggravation of arthritis, dysbiosis and higher serum LPS (1). We reported that IgA/IgG antibody against Pg-LPS ratio among the patients with RA related to disease marker levels and disease activities (2). However, there are still few reports related to Gut-Oral axis.Objectives:Firstly, how total intestinal bacteria, well-known 5 species of gut bacteria behave in relation to disease activities and markers. Secondly, how infection by Pg aggravate RA in relation to microflora, disease activities and markers.Methods:Eighty-seven RA patients with inadequate response to conventional synthetic DMARDs were evaluated. Age: 68.1±8.7 years, female (%): 79.3, disease duration: 136±91 months, DAS28-ESR: 4.68±0.98. Fecal bacteria numbers of total bacteria, Bifidobacterium, Lactobacillus, E. coli, Bacteroides and Staphylococcus were determined by PCR analysis. Fecal and serum LPS levels were measured by LAL assay. Serum endotoxin neutralizing activity (ENC) was determined along with RA disease activity and markers measurement. Infection of Pg was proofed by IgG and IgA anti-LPS antibody measurement. The statistical relationships between variables were analyzed by Spearman’s non-parametric rank correlation analysis and expressed as Spearman’s rank correlation coefficient “ρ”.Results:At first, we could neglect background effects as duration, methotrexate dose for measuring total or each bacterial number (data not shown). As shown in Figure 1, total bacteria only showed positive correlation with IL-6 levels (ρ= 0.230, p = 0.034), however inversely correlated with disease activities such as pVAS (ρ= -0.223, p = 0.038) and Pain VAS (ρ= -0.260, p = 0.015). While no significant relationship was observed between the numbers of each of 5 species of bacteria and the disease activities and makers except Bifidobacterium. In contrast, LPS-related markers showed positive correlation with disease activities and markers. Among LPS-related biomarker values, serum LBP levels mainly correlated with most of RA biomarker-ESR (ρ= 0.497, p <0.0001), CRP (ρ= 0.697, p <0.0001), MMP3 (ρ= 0.546, p <0.0001) and so on. Fecal LPS level was shown significant positive correlation with disease activities, however almost no correlation was observed in serum LPS level. IgA anti-LPS antibody levels to Pg, resulted in inverse correlation with total bacteria (ρ= -0.441, p<0.0001), Lactobacillus (ρ= -0.224, p=0.037), Bacteroides (ρ = -0.200, p = 0.064) and E. coli (ρ= -0.260, p = 0.015), moreover, positive correlation with serum LPS (ρ= 0.284, p = 0.008) and LBP (ρ= 0.247, p = 0.021) and inverse correlation with ENC (ρ = -0.321, p = 0.002) were found. On the other hand, IgG anti-Pg-LPS antibody levels which reflect systemic infection, inversely correlated SDAI (ρ = -0.308, p = 0.004), PainVAS (ρ = -0.433, p < 0.0001), and so on.Conclusion:Serum LBP highly associated with RA activity and markers, which suggests bacterial LPS as roles in triggering and perpetuating disease activity in RA. In contrast, IgA anti-Pg-LPS, IgG anti-Pg-LPS antibody reflecting infection of Pg, negatively associated with intestinal total bacteria (ρ=-0.4405, p<0.0001), RA disease activities, respectively. These results may show a possible oral -gut relationship resulting in aggravation of disease activity in RA.Disclosure of interest:None declaredReferences:[1]Sato K, Takahashi N, Kato T et al. Aggravation of collagen induced arthritis by orally administered Porphyromonas gingivalis through modulation of the gut microbiota and gut immune system. Sci Rep 2017; 7:6955.[2]Kuniaki Terato, Takaki Waritani, Richio Fukai et al. Contribution of bacterial pathogens to evoking serological disease markers and aggravating disease activity in rheumatoid arthritis. PloS One. 2018;13(2): e0190588.Disclosure of Interests:None declared
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22
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Kitamura K, Fujii M, Utsunomiya T, Iwamoto M, Ikemura S, Hamai S, Motomura G, Todo M, Nakashima Y. Effect of sagittal pelvic tilt on joint stress distribution in hip dysplasia: A finite element analysis. Clin Biomech (Bristol, Avon) 2020; 74:34-41. [PMID: 32114278 DOI: 10.1016/j.clinbiomech.2020.02.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 01/24/2020] [Accepted: 02/17/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Physiologic pelvic tilt can change acetabular orientation and coverage in patients with hip dysplasia. In this study, we aimed to clarify the impact of change in sagittal pelvic tilt on joint stress distribution in dysplastic hips. METHODS We developed patient-specific finite element models of 21 dysplastic hips and 21 normal hips. The joint contact area, contact pressure, and equivalent stress of the acetabular cartilage were assessed at three pelvic tilt positions relative to the functional pelvic plane: 10° anterior tilt, no tilt, and 10° posterior tilt. FINDINGS The mean contact area was 0.6-0.7 times smaller, the mean maximum contact pressure was 1.8-1.9 times higher, and the mean maximum equivalent stress was 1.3-2.8 times higher in dysplastic hips than in normal hips at all three pelvic positions. As the pelvis tilted from 10° anterior to 10° posterior, the mean contact area decreased, and the mean maximum contact pressure and median maximum equivalent stress increased. The latter two changes were more significant in dysplastic hips than in normal hips (total increment was 1.3 MPa vs. 0.4 MPa, P = 0.001, and 3.6 MPa vs. 0.4 MPa, P < 0.001, respectively). The mean equivalent stress increased in the anterosuperior acetabulum during posterior pelvic tilt in dysplastic and normal hips, while the change was not significant in the superior and posterosuperior acetabulum in both groups. INTERPRETATION Sagittal pelvic tilt alters the loading environment and joint stress distribution of the hip joint and may impact the degeneration process in dysplastic hips.
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Affiliation(s)
- Kenji Kitamura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Masanori Fujii
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | - Takeshi Utsunomiya
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Miho Iwamoto
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Satoshi Ikemura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Satoshi Hamai
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Goro Motomura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Mitsugu Todo
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
| | - Yasuharu Nakashima
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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Kanki T, Kuwabara T, Morinaga J, Fukami H, Umemoto S, Fujimoto D, Mizumoto T, Hayata M, Kakizoe Y, Izumi Y, Tajiri S, Tajiri T, Kitamura K, Mukoyama M. SUN-181 HIGH SERUM CALPROTECTIN LEVELS MAY PREDICT MORTALITY RISK IN HEMODIALYSIS PATIENTS WITH HIGH-PHOSPHATE CONDITIONS. Kidney Int Rep 2020. [DOI: 10.1016/j.ekir.2020.02.714] [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: 11/26/2022] Open
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24
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Morimoto N, Kimura K, Shirai T, Doki T, Sano S, Horiba A, Kitamura K. Talbot-Lau interferometry-based x-ray imaging system with retractable and rotatable gratings for nondestructive testing. Rev Sci Instrum 2020; 91:023706. [PMID: 32113388 DOI: 10.1063/1.5131306] [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] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 01/18/2020] [Indexed: 06/10/2023]
Abstract
We develop an x-ray imaging system based on Talbot-Lau interferometry equipped with a mechanical structure for retracting and rotating gratings from the optical axis, which enables not only x-ray phase contrast imaging but also conventional x-ray imaging with high-magnification such as microcomputed tomography (μCT). We investigate the characterization of carbon fiber reinforced plastic (CFRP) laminates using this apparatus. Microcracks and fiber orientations are visualized in the dark-field images. Compared with the obtained μCT images, the relationship between the CFRP microstructures and the contrasts in the dark-field images are recognizable.
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Affiliation(s)
- N Morimoto
- Radiation Technology Unit, Technology Research Laboratory, Shimadzu Corporation, 3-9-4 Hikaridai, Seika-cho, Soraku-gun, 619-0237 Kyoto, Japan
| | - K Kimura
- Radiation Technology Unit, Technology Research Laboratory, Shimadzu Corporation, 3-9-4 Hikaridai, Seika-cho, Soraku-gun, 619-0237 Kyoto, Japan
| | - T Shirai
- Radiation Technology Unit, Technology Research Laboratory, Shimadzu Corporation, 3-9-4 Hikaridai, Seika-cho, Soraku-gun, 619-0237 Kyoto, Japan
| | - T Doki
- Radiation Technology Unit, Technology Research Laboratory, Shimadzu Corporation, 3-9-4 Hikaridai, Seika-cho, Soraku-gun, 619-0237 Kyoto, Japan
| | - S Sano
- Radiation Technology Unit, Technology Research Laboratory, Shimadzu Corporation, 3-9-4 Hikaridai, Seika-cho, Soraku-gun, 619-0237 Kyoto, Japan
| | - A Horiba
- Radiation Technology Unit, Technology Research Laboratory, Shimadzu Corporation, 3-9-4 Hikaridai, Seika-cho, Soraku-gun, 619-0237 Kyoto, Japan
| | - K Kitamura
- Radiation Technology Unit, Technology Research Laboratory, Shimadzu Corporation, 3-9-4 Hikaridai, Seika-cho, Soraku-gun, 619-0237 Kyoto, Japan
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25
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Kita T, Furukoji E, Sakae T, Kitamura K. P3562Efficient selection of patients with aldosterone-producing adenoma using the ACTH stimulation test. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0425] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Adrenal venous sampling (AVS) is the gold standard test for distinguishing between unilateral and bilateral primary aldosteronism (PA), however, AVS requires advanced and time consuming technique. The needs for AVS has been increasing due to increased utilization of screening for PA. Efficient selection of unilateral PA, such as aldosterone-producing adenoma (APA), before AVS is useful to avoid undesirable AVS in bilateral PA, such as idiopathic hyperaldosteronism. In this study, 40 patients who underwent all three confirmatory tests including the captopril-challenge test, furosemide upright test and adrenocorticotropin (ACTH) stimulation test (AST), and who were diagnosed as having PA by AVS were recruited. Subjects were diagnosed as having unilateral aldosterone excess (n=22) or bilateral aldosterone excess (n=18) by AVS. All patients with unilateral PA underwent operation and were finally diagnosed with APA. Major differences were detected in serum potassium level, basal plasma aldosterone concentration (PAC), presence of adrenal tumor, and AST results between the two groups. The PAC/cortisol ratio at 120 min in the AST showed the highest diagnostic capability for distinguishing the subtype of PA according to a receiver operating characteristic (ROC) curve analysis (area under the ROC curve was 0.956). At a cut-off value of 1.20 for the PAC/cortisol ratio at 120 min on AST, the sensitivity was 95.5% and the specificity was 88.9%. Sufficiently high sensitivity demonstrated indicates that the PAC/cortisol ratio at 120 min in the AST is useful for selecting patients with PA who are suitable for AVS.
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Affiliation(s)
- T Kita
- University of Miyazaki, Division of Circulatory and Body Fluid Regulation, Dpt of Internal Medicine, Faculty of Medicine, Miyazaki, Japan
| | - E Furukoji
- University of Miyazaki, Department of Radiology, Faculty of Medicine, Miyazaki, Japan
| | - T Sakae
- University of Miyazaki, Department of Radiology, Faculty of Medicine, Miyazaki, Japan
| | - K Kitamura
- University of Miyazaki, Division of Circulatory and Body Fluid Regulation, Dpt of Internal Medicine, Faculty of Medicine, Miyazaki, Japan
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Kadoguchi T, Shimada K, Hamad A, Aikawa T, Ouchi S, Kitamura K, Kunimoto M, Fukao K, Yokoyama M, Sugita Y, Shiozawa T, Matsushita S, Miyazaki T, Isoda K, Daida H. P629Voluntary exercise associated with myokine production ameliorates cardiac remodeling and inflammation in a myocardial infarction mouse model. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0237] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Left ventricular (LV) remodeling, through excessive inflammation, leads to heart failure. Exercise (Ex) training is associated with a risk reduction in heart failure through direct and indirect mechanisms by which Ex contributes an anti-inflammatory effect. During Ex, contracting muscle fibers release myokines, including interleukins (ILs), tumor necrosis factor α (TNF-α), follistatin-like protein 1 (FSTL-1), and fibroblast growth factor 21 (FGF-21), into the bloodstream. These myokines may have beneficial effects on other damaged organs, such as an infarcted myocardium, through anti-inflammatory effects. However, the exact mechanisms of the anti-inflammatory effects of voluntary Ex in myocardial infarction (MI) are poorly understood. Therefore, we investigated the effect of voluntary Ex on cardiac remodeling and inflammation, the relationship between cardiac remodeling and skeletal muscle (SKM) response, and circulating myokine levels in a mouse model of MI.
Methods
Twelve-week-old male C57BL/6J mice were used and divided into the following 4 groups: sham operation (Sham), MI, Sham+Ex, and MI+Ex. MI was induced by ligation of the left anterior descending coronary artery. Ex groups began voluntary wheel running for 4 weeks after the operation. An echocardiography was performed at baseline and 4 weeks after the operation. The mRNA levels in the LV infarcted area and SKM were measured with RT-PCR and western blot analysis. Plasma levels of myokines were also measured with immunoassays.
Results
Four weeks after MI induction, echocardiographic evaluation showed that the MI mice had a larger LV end-diastolic diameter (LVEDD) and end-systolic diameter (LVESD) than the Sham mice. The MI mice also showed higher mRNA levels of TNF-α, IL-1β, IL-6, and IL-10 in the LV tissue when compared to the Sham mice. These changes were significantly ameliorated in the MI+Ex mice. Interestingly, in the MI+Ex mice, mRNA levels of IL-6, IL-1β, FSTL-1, and FGF-21 in the SKM were significantly higher than in the MI mice, while there were no significant differences in TNF-α and IL-10 levels in all groups. Similarly, protein expression levels of peroxisome proliferator-activated receptor gamma coactivator 1-alpha, sirtuin-1, and mitochondrial transcriptional factor A of mitochondrial function markers in SKM were also significantly higher in the MI+Ex mice than in the MI mice. Furthermore, there were significant correlations between plasma levels of IL-1β, but not other myokines, and LVEDD, and LVESD. In addition, there was also a significant correlation between the SKM IL-1β level and LVESD in the Sham+Ex mice (all, P<0.05).
Conclusions
Amelioration of cardiac remodeling and inflammation by voluntary Ex is associated with increased myokines, especially IL-1β, in a MI mouse model. These results suggest that increased myokine levels, through voluntary exercise, may play an important role in the prevention of cardiac remodeling after MI.
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Affiliation(s)
- T Kadoguchi
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - K Shimada
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - A Hamad
- Prince Sultan Cardiac Center, Riyadh, Saudi Arabia
| | - T Aikawa
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - S Ouchi
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - K Kitamura
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - M Kunimoto
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - K Fukao
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - M Yokoyama
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - Y Sugita
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - T Shiozawa
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - S Matsushita
- Juntendo University, Cardiovascular Surgery, Tokyo, Japan
| | - T Miyazaki
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - K Isoda
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - H Daida
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
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Kitamura K, Isoda K, Akita K, Miyosawa K, Kadoguchi T, Shimada K, Daida H. P4141Lack of IkBNS promotes cholate-containing high-fat diet-induced inflammation and atherogenesis in low-density lipoprotein (LDL) receptor-deficient mice. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0713] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
IκBNS is one of the nuclear IκB proteins and regulates a subset of Toll-like receptor (TLR) dependent genes. LPS acts as extremely strong stimulator of innate immunity. We tried to investigate whether stimulation of innate immunity could promote atherosclerosis in the IκBNS-deficient atherogenic mice. However all IκBNS-deficient mice died of LPS challenge at a dose of which almost all wild-type mice survived, because IκBNS-deficient mice are highly sensitive to LPS-induced endotoxin shock. Then, we decided to use a cholate-containing high fat diet (HFD(CA(+))), which has been widely used as an atherogenic diet in mice. Furthermore, HFD(CA(+)) has been shown to induce TLR4 mediated early inflammatory response. The present study aims to clarify the lack of IκBNS promotes atherogenesis in LDL receptor-deficient (LDLr−/−) mice fed HFD(CA(+)) compared with those fed a cholate-free HFD (HFD(CA(−)).
Methods and results
Mice that lacked IκBNS (IκBNS−/−) were crossed with LDLr−/− mice and formation of atherosclerotic lesions was analyzed after 6 weeks consumption of HFD(CA(+)) or HFD(CA(−)). The extent of atherosclerosis in the aorta (en face) was significantly increased in IκBNS−/−/LDLr−/−(CA(+)) mice compared with others after 6-week consumption of HFD (p<0.01) (Figure). Interestingly, HFD(CA(−)) did not induce significant atherosclerotic lesions in IκBNS−/−/LDLr−/− compared with LDLr−/− mice after 6-week consumption (Figure). Immunostaining of aortic root lesion revealed that HFD(CA(+)) significantly increased positive area of Mac-3 (macrophage) by 1.5-fold (p=0.01) and TLR4, interleukin-6 (IL-6) expression by 1.7-fold (P<0.05) and 1.5-fold (p<0.05) respectively in IκBNS−/−/LDLr−/− (CA(+)) compared to LDLr−/− (CA(+)) mice. Furthermore, active STAT3 (pSTAT3)-positive cells were significantly increased by 1.7-fold in the atherosclerotic lesions of IκBNS−/−/LDLr−/− (CA(+)) compared with LDLr−/− (CA(+)) mice (p<0.01). TLR4 positive areas, IL-6 positive areas, and pSTAT3 positive cells were overlapped with Mac-3, indicating that TLR4-IL-6-STAT3 axis was activated in macrophages in IκBNS−/−/LDLr−/− (CA(+)) mice. On the other hand, HFD(CA(−)) could not induce any difference in these immunoreactivities of arteriosclerotic lesions between IκBNS−/−/LDLr−/− (CA(−)) compared with LDLr−/− (CA(−)) mice. These findings suggest that IκBNS deficiency and HFD(CA(+)) promote atherogenesis in LDLr−/− mice via TLR4/IL-6/STAT3 pathway. Finally, we show the monocytes from peripheral blood of IκBNS−/−/LDLr−/− (CA(+)) mice were found to contain the most mounts of Ly6Chi among four groups, suggesting that lack of IκBNS enhances inflammation in the response HFD(CA(+)) feeding and thereby influence atherogenesis in IκBNS−/−/LDLr−/− mice.
Aortic root atherosclerotic lesions
Conclusions
The present study is the first to demonstrate that the activation of innate immune system using HFD(CA(+)) induced significant inflammation and atherogenesis in IκBNS−/−/LDLr−/− compared with LDLr−/− mice.
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Affiliation(s)
- K Kitamura
- Juntendo University School of Medicine, Cardiology, Tokyo, Japan
| | - K Isoda
- Juntendo University School of Medicine, Cardiology, Tokyo, Japan
| | - K Akita
- Juntendo University School of Medicine, Cardiology, Tokyo, Japan
| | - K Miyosawa
- Juntendo University School of Medicine, Cardiology, Tokyo, Japan
| | - T Kadoguchi
- Juntendo University School of Medicine, Cardiology, Tokyo, Japan
| | - K Shimada
- Juntendo University School of Medicine, Cardiology, Tokyo, Japan
| | - H Daida
- Juntendo University School of Medicine, Cardiology, Tokyo, Japan
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Marte L, Boronat S, García-Santamarina S, Ayté J, Kitamura K, Hidalgo E. Identification of ubiquitin-proteasome system components affecting the degradation of the transcription factor Pap1. Redox Biol 2019; 28:101305. [PMID: 31514053 PMCID: PMC6742857 DOI: 10.1016/j.redox.2019.101305] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 06/14/2019] [Revised: 08/13/2019] [Accepted: 08/20/2019] [Indexed: 01/06/2023] Open
Abstract
Signaling cascades respond to specific inputs, but also require active interventions to be maintained in their basal/inactive levels in the absence of the activating signal(s). In a screen to search for protein quality control components required for wild-type tolerance to oxidative stress in fission yeast, we have isolated eight gene deletions conferring resistance not only to H2O2 but also to caffeine. We show that dual resistance acquisition is totally or partially dependent on the transcription factor Pap1. Some gene products, such as the ribosomal-ubiquitin fusion protein Ubi1, the E2 conjugating enzyme Ubc2 or the E3 ligase Ubr1, participate in basal ubiquitin labeling of Pap1, and others, such as Rpt4, are non-essential constituents of the proteasome. We demonstrate here that basal nucleo-cytoplasmic shuttling of Pap1, occurring even in the absence of stress, is sufficient for the interaction of the transcription factor with nuclear Ubr1, and we identify a 30 amino acids peptide in Pap1 as the degron for this important E3 ligase. The isolated gene deletions increase only moderately the concentration of the transcription factor, but it is sufficient to enhance basal tolerance to stress, probably by disturbing the inactive stage of this signaling cascade.
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Affiliation(s)
- Luis Marte
- Oxidative Stress and Cell Cycle Group, Universitat Pompeu Fabra, C/ Doctor Aiguader 88, 08003, Barcelona, Spain
| | - Susanna Boronat
- Oxidative Stress and Cell Cycle Group, Universitat Pompeu Fabra, C/ Doctor Aiguader 88, 08003, Barcelona, Spain
| | - Sarela García-Santamarina
- Oxidative Stress and Cell Cycle Group, Universitat Pompeu Fabra, C/ Doctor Aiguader 88, 08003, Barcelona, Spain
| | - José Ayté
- Oxidative Stress and Cell Cycle Group, Universitat Pompeu Fabra, C/ Doctor Aiguader 88, 08003, Barcelona, Spain
| | - Kenji Kitamura
- Center for Gene Science, Hiroshima University, 1-4-2 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan
| | - Elena Hidalgo
- Oxidative Stress and Cell Cycle Group, Universitat Pompeu Fabra, C/ Doctor Aiguader 88, 08003, Barcelona, Spain.
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Kadowaki D, Fukunaga M, Sueyoshi M, Uchimura K, Kitamura K, Narita Y, Maruyama T, Otagiri M, Seo H, Hirata S. SUN-153 ACCUMULATION OF ACETAMINOPHEN METABOLITES EXERTS KIDNEY PROTECTIVE EFFECT IN RENAL FAILURE RAT MODEL. Kidney Int Rep 2019. [DOI: 10.1016/j.ekir.2019.05.554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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30
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Takaine M, Ueno M, Kitamura K, Imamura H, Yoshida S. Reliable imaging of ATP in living budding and fission yeast. J Cell Sci 2019; 132:jcs.230649. [PMID: 30858198 DOI: 10.1242/jcs.230649] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Accepted: 03/04/2019] [Indexed: 01/12/2023] Open
Abstract
Adenosine triphosphate (ATP) is a main metabolite essential for all living organisms. However, our understanding of ATP dynamics within a single living cell is very limited. Here, we optimized the ATP-biosensor QUEEN and monitored the dynamics of ATP with good spatial and temporal resolution in living yeasts. We found stable maintenance of ATP concentration in wild-type yeasts, regardless of carbon sources or cell cycle stages, suggesting that mechanism exists to maintain ATP at a specific concentration. We further found that ATP concentration is not necessarily an indicator of metabolic activity, as there is no clear correlation between ATP level and growth rates. During fission yeast meiosis, we found a reduction in ATP levels, suggesting that ATP homeostasis is controlled by differentiation. The use of QUEEN in yeasts offers an easy and reliable assay for ATP dynamicity and will answer several unaddressed questions about cellular metabolism in eukaryotes.
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Affiliation(s)
- Masak Takaine
- Gunma University Initiative for Advanced Research (GIAR), Gunma University, Maebashi 371-8512, Japan .,Institute for Molecular and Cellular Regulation (IMCR), Gunma University, Maebashi 371-8512, Japan
| | - Masaru Ueno
- Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Japan.,Research Center for the Mathematics on Chromatin Live Dynamics, Hiroshima University, Japan
| | - Kenji Kitamura
- Center for Gene Science, Hiroshima University, 1-4-2 Kagamiyama, Higashi-Hiroshima 739-8527, Japan
| | - Hiromi Imamura
- Department of Functional Biology, Graduate School of Biostudies, Kyoto University, Kyoto 606-8501, Japan
| | - Satoshi Yoshida
- Gunma University Initiative for Advanced Research (GIAR), Gunma University, Maebashi 371-8512, Japan .,Institute for Molecular and Cellular Regulation (IMCR), Gunma University, Maebashi 371-8512, Japan.,School of International Liberal Studies, Waseda University, Tokyo, 169-8050, Japan.,Japan Science and Technology Agency, PREST
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31
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Shimizu Y, Sawada N, Nakamura K, Watanabe Y, Kitamura K, Iwasaki M, Tsugane S. Menstrual and reproductive factors and risk of vertebral fractures in Japanese women: the Japan Public Health Center-based prospective (JPHC) study. Osteoporos Int 2018; 29:2791-2801. [PMID: 30143851 DOI: 10.1007/s00198-018-4665-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 08/12/2018] [Indexed: 12/13/2022]
Abstract
UNLABELLED This large-scale population-based cohort study in Japan was conducted to clarify the effects of menstrual and reproductive factors on the risk of later-life vertebral fractures in women. Significant associations were seen for later menarche, irregular menstruation, and shorter reproductive years, corresponding to the effect of reproductive hormonal disturbance on bone metabolism. INTRODUCTION This study investigated the association between menstrual and reproductive factors and the risk of later-life vertebral fractures in women. METHODS Participants were 43,652 women aged 40-69 years who were followed in the 10-year survey of the Japan Public Health Center-based prospective (JPHC) study. Menstrual/reproductive factors were as follows: age at menarche and menopause, menstrual regularity and cycle length, natural or surgical menopause, years since menopause, reproductive years, parity, age at first birth, number of births, breastfeeding, and female hormone use. Odds ratios (ORs) and 95% confidence intervals (CIs) were estimated by logistic regression analysis with adjustment for well-known fracture risk factors and menstrual/reproductive factors. RESULTS During the 10-year period, 250 women reported first onset of vertebral fractures. Menarche at ≥16 years [OR (95% CI) = 2.08 (1.24-3.48)] compared to ≤ 13 years and irregular menstruation [1.42 (1.01-2.00)] compared to regular menstruation showed significantly higher adjusted ORs. Longer reproductive years had significant inverse association [0.96 (0.92-0.99)] in menopausal women. Women with both menarche ≥ 15 years and irregular menstruation had higher adjusted ORs (95% CI) [2.37 (1.51-3.73) in all women, 2.25 (1.35-3.76) in menopausal women] compared to women without these, and both factors had significant interaction, particularly in menopausal women (additive p = 0.025, multiplicative p = 0.0499). CONCLUSIONS Menstrual and reproductive factors, corresponding to the effect of reproductive hormonal disturbance on bone metabolism, might affect the risk of later-life vertebral fractures.
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Affiliation(s)
- Y Shimizu
- Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
| | - N Sawada
- Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan.
| | - K Nakamura
- Department of Preventive Medicine, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Y Watanabe
- Department of Preventive Medicine, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - K Kitamura
- Department of Preventive Medicine, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - M Iwasaki
- Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
| | - S Tsugane
- Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
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32
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Kadoguchi T, Shimada K, Miyazaki T, Aikawa T, Ouchi S, Kitamura K, Kunimoto M, Sugita Y, Shiozawa T, Isoda K, Daida H. 3142Angiotensin II-dependent activation of NADPH oxidase 4 contributes to muscle wasting in mice via downregulation of NF-E2-related factor 2. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.3142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- T Kadoguchi
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - K Shimada
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - T Miyazaki
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - T Aikawa
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - S Ouchi
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - K Kitamura
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - M Kunimoto
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - Y Sugita
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - T Shiozawa
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - K Isoda
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - H Daida
- Juntendo University, Department of Cardiovascular Medicine, Tokyo, Japan
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33
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Ishii K, Isoda K, Kitamura K, Sato-Okabayashi Y, Akita K, Kadoguchi T, Ohtomo F, Shimada K, Daida H. P1843Deficiency of interleukin-1 receptor antagonist continues angiotensin II induced aortic inflammation and promotes aneurysm formation after the cessation of its infusion. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- K Ishii
- Juntendo University School of Medicine, Cardiovascular Medicine, Tokyo, Japan
| | - K Isoda
- Juntendo University School of Medicine, Cardiovascular Medicine, Tokyo, Japan
| | - K Kitamura
- Juntendo University School of Medicine, Cardiovascular Medicine, Tokyo, Japan
| | - Y Sato-Okabayashi
- Juntendo University School of Medicine, Cardiovascular Medicine, Tokyo, Japan
| | - K Akita
- Juntendo University School of Medicine, Cardiovascular Medicine, Tokyo, Japan
| | - T Kadoguchi
- Juntendo University School of Medicine, Cardiovascular Medicine, Tokyo, Japan
| | - F Ohtomo
- Juntendo University School of Medicine, Cardiovascular Medicine, Tokyo, Japan
| | - K Shimada
- Juntendo University School of Medicine, Cardiovascular Medicine, Tokyo, Japan
| | - H Daida
- Juntendo University School of Medicine, Cardiovascular Medicine, Tokyo, Japan
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34
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Abedi T, Khalil MFM, Koike K, Hagura Y, Tazoe Y, Ishida N, Kitamura K, Tanaka N. Expression of the human UDP-galactose transporter gene hUGT1 in tobacco plants' enhanced plant hardness. J Biosci Bioeng 2018; 126:241-248. [PMID: 29650365 DOI: 10.1016/j.jbiosc.2018.03.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 11/14/2017] [Revised: 03/07/2018] [Accepted: 03/08/2018] [Indexed: 11/30/2022]
Abstract
We reported previously that tobacco plants transformed with the human UDP-galactose transporter 1 gene (hUGT1) had enhanced growth, displayed characteristic traits, and had an increased proportion of galactose (hyper-galactosylation) in the cell wall matrix polysaccharides. Here, we report that hUGT1-transgenic plants have an enhanced hardness. As determined by breaking and bending tests, the leaves and stems of hUGT1-transgenic plants were harder than those of control plants. Transmission electron microscopy revealed that the cell walls of palisade cells in leaves, and those of cortex cells and xylem fibers in stems of hUGT1-transgenic plants, were thicker than those of control plants. The increased amounts of total cell wall materials extracted from the leaves and stems of hUGT1-transgenic plants supported the increased cell wall thickness. In addition, the cell walls of the hUGT1-transgenic plants showed an increased lignin contents, which was supported by the up-regulation of lignin biosynthetic genes. Thus, the heterologous expression of hUGT1 enhanced the accumulation of cell wall materials, which was accompanied by the increased lignin content, resulting in the increased hardness of the leaves and stems of hUGT1-trangenic plants. The enhanced accumulation of cell wall materials might be related to the hyper-galactosylation of cell wall matrix polysaccharides, most notably arabinogalactan, because of the enhanced UDP-galactose transport from the cytosol to the Golgi apparatus by hUGT1, as suggested in our previous report.
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Affiliation(s)
- Tayebeh Abedi
- Department of Molecular Biotechnology, Graduate School of Advanced Science of Matter, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8530, Japan.
| | - Mohamed Farouk Mohamed Khalil
- Gene Science Division, Natural Science Center for Basic Research and Development, Hiroshima University, 1-4-2 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan.
| | - Kanae Koike
- Gene Science Division, Natural Science Center for Basic Research and Development, Hiroshima University, 1-4-2 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan.
| | - Yoshio Hagura
- Department of Biofunctional Science and Technology, Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8528, Japan.
| | - Yuma Tazoe
- Department of Biofunctional Science and Technology, Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8528, Japan.
| | - Nobuhiro Ishida
- Department of Environmental Security Systems, Faculty of Risk and Crisis Management, Chiba Institute of Science, 3 Shiomi-cho, Choshi, Chiba 288-0025, Japan.
| | - Kenji Kitamura
- Department of Molecular Biotechnology, Graduate School of Advanced Science of Matter, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8530, Japan; Gene Science Division, Natural Science Center for Basic Research and Development, Hiroshima University, 1-4-2 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan.
| | - Nobukazu Tanaka
- Department of Molecular Biotechnology, Graduate School of Advanced Science of Matter, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8530, Japan; Gene Science Division, Natural Science Center for Basic Research and Development, Hiroshima University, 1-4-2 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan.
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Aikawa T, Miyazaki T, Shimada K, Sugita Y, Kitamura K, Kunimoto M, Shimizu M, Ouchi S, Shiozawa T, Kadoguchi T, Hiki M, Takahashi S, Daida H. P5411Low serum vitamin D levels are associated with polyunsaturated fatty acids, inflammation and long-term mortality in patients with acute cardiovascular disease. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- T Aikawa
- Juntendo university graduate school of medicine, Cardiovascular medicine, Tokyo, Japan
| | - T Miyazaki
- Juntendo university graduate school of medicine, Cardiovascular medicine, Tokyo, Japan
| | - K Shimada
- Juntendo university graduate school of medicine, Cardiovascular medicine, Tokyo, Japan
| | - Y Sugita
- Juntendo university graduate school of medicine, Cardiovascular medicine, Tokyo, Japan
| | - K Kitamura
- Juntendo university graduate school of medicine, Cardiovascular medicine, Tokyo, Japan
| | - M Kunimoto
- Juntendo university graduate school of medicine, Cardiovascular medicine, Tokyo, Japan
| | - M Shimizu
- Juntendo university graduate school of medicine, Cardiovascular medicine, Tokyo, Japan
| | - S Ouchi
- Juntendo university graduate school of medicine, Cardiovascular medicine, Tokyo, Japan
| | - T Shiozawa
- Juntendo university graduate school of medicine, Cardiovascular medicine, Tokyo, Japan
| | - T Kadoguchi
- Juntendo university graduate school of medicine, Cardiovascular medicine, Tokyo, Japan
| | - M Hiki
- Juntendo university graduate school of medicine, Cardiovascular medicine, Tokyo, Japan
| | - S Takahashi
- Juntendo university graduate school of medicine, Cardiovascular medicine, Tokyo, Japan
| | - H Daida
- Juntendo university graduate school of medicine, Cardiovascular medicine, Tokyo, Japan
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Abstract
A 20-year-old man was admitted to Kyushu University Hospital with complaints of severe headache and episodic hypertension (200/100 mmHg). Ultrasonograms and computed tomographs revealed tumors in the left adrenal region and in the right lower lobe of the thyroid gland. Total thyroidectomy and left adrenalectomy were performed. The excised thyroid tumor and adrenal tumor were pathologically diagnosed as papillary adenocarcinoma and pheochromocytoma, respectively. A chromosome analysis revealed no karyotypic abnormality. Whereas the world literature records such occurrences in women, this is the first report of a simultaneous occurrence of pheochromocytoma and papillary adenocarcinoma of the thyroid in a young man.
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Affiliation(s)
- Y Kido
- Department of Surgery II, Kyushu University, Fukuoka, Japan
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37
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Kitamura K, Kinsui EZB. The benefits and risks of expressing the POT and FOT family of oligopeptide transporters in Saccharomyces cerevisiae. Biosci Biotechnol Biochem 2018; 82:540-546. [PMID: 29447073 DOI: 10.1080/09168451.2018.1433994] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
In the yeast Saccharomyces cerevisiae, all strains possess a gene for the evolutionarily conserved POT family peptide transporter, Ptr2; however, the genes for a novel FOT family transporter were found only in some wine brewing strains. The substrate specificity of the POT and FOT family of transporters was compared. Among the naturally occurring oligopeptides that were tested, Lys-Leu and Arg-Phe were Ptr2-specific substrates. Artificial dipeptide aspartame was imported specifically through the FOT transporter, but the structurally similar Asp-Phe was a substrate of both FOT and Ptr2 transporters. Furthermore, only the FOT transporter was important for high sensitivity to an antibiotic puromycin. These results demonstrate that the POT and FOT family of transporters have distinct substrate preferences although both transporters import overlapping dipeptide substrates. Having POT and FOT transporters is advantageous for cells to acquire nutrients, but also detrimental when these cells are exposed to the toxic molecules of their substrates.
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Affiliation(s)
- Kenji Kitamura
- a Center for Gene Science , Hiroshima University , Higashi-Hiroshima , Japan
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38
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Kido H, Terashima T, Yamashita T, Takatori H, Kitamura K, Kaneko S. Dose intensity and initial treatment effect of FOLFIRINOX supported with pegfilgrastim for patients with pancreatic ductal adenocarcinoma. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx660.037] [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: 11/13/2022] Open
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39
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Kobal R, Nakamura F, Kitamura K, Cal Abad C, Pereira L, Loturco I. Vertical and depth jumping performance in elite athletes from different sports specialties. Sci Sports 2017. [DOI: 10.1016/j.scispo.2017.01.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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40
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Kitamura K, Isoda K, Akita K, Okabayashi Y, Shimada K, Daida H. 3855An anti-Interleukin-1beta antibody suppresses both angiotensin II-induced hypertension and aortic aneurysm. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.3855] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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41
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Tone T, Fujisawa N, Seki Y, Iida H, Tachikawa K, Sugihara M, Minato A, Nishio S, Yamamoto T, Kitamura K, Ueda K, Saito S, Shimada R, Matsuda Y, Naruse Y, Shimamoto S, Tamura S, Yoshikawa M, Tomabechi K. Conceptual Design of Fusion Experimental Reactor(FER). ACTA ACUST UNITED AC 2017. [DOI: 10.13182/fst83-a22924] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Tone
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - N. Fujisawa
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - Y. Seki
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - H. Iida
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - K. Tachikawa
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - M. Sugihara
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - A. Minato
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - S. Nishio
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - T. Yamamoto
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - K. Kitamura
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - K. Ueda
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - S. Saito
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - R. Shimada
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - Y. Matsuda
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - Y. Naruse
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - S. Shimamoto
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - S. Tamura
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - M. Yoshikawa
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - K. Tomabechi
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
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Kadoguchi T, Shimada K, Shiozawa T, Takahashi S, Hamad A, Aikawa T, Ouchi S, Kitamura K, Sugita Y, Miyazaki T, Akita K, Isoda K, Daida H. P4483NADPH oxidase 4 induces muscle wasting via regulation of NF-E2-related factor 2 in angiotensin ii-infusion mice. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p4483] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kato J, Kawagoe Y, Jiang D, Kuwasako K, Shimamoto S, Igarashi K, Tokashiki M, Kitamura K. Plasma levels of natriuretic peptides and year-by-year blood pressure variability: a population-based study. J Hum Hypertens 2017; 31:525-529. [DOI: 10.1038/jhh.2017.14] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 01/12/2017] [Accepted: 01/23/2017] [Indexed: 10/20/2022]
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Kawabata K, Kitamura K, Irie K, Naruse S, Matsuura T, Uemae T, Taira S, Ohigashi H, Murakami S, Takahashi M, Kaido Y, Kawakami B. Triterpenoids Isolated from Ziziphus jujuba Enhance Glucose Uptake Activity in Skeletal Muscle Cells. J Nutr Sci Vitaminol (Tokyo) 2017; 63:193-199. [PMID: 28757534 DOI: 10.3177/jnsv.63.193] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [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: 11/27/2022]
Abstract
Jujube (Ziziphus jujuba Mill.), a traditional folk medicine and functional food in China and South Korea, is known for its beneficial properties, which include anti-cancer, anti-oxidative, and anti-obesity effects. To assess the anti-hyperglycemic effect of jujube in this study, we investigated the glucose uptake-promoting activity of jujube in rat L6 myotubes. After determining that the jujube extract induces muscle glucose uptake, we identified the following active compounds by bioassay-guided fractionation: betulonic acid, betulinic acid, and oleanonic acid. Ursonic acid, known to be present in jujube, was semi-synthesized from ursolic acid and also observed to enhance glucose uptake. These four triterpenic acids induced glucose uptake in a glucose transporter 4-dependent manner. Comparison experiments of jujube fruits from three countries, namely, China, South Korea, and Japan, revealed that Japanese jujube has a higher content of active triterpenoids and is the most potent enhancer of glucose uptake.
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Affiliation(s)
- Kyuichi Kawabata
- Department of Bioscience, Faculty of Biotechnology, Fukui Prefectural University
| | - Kenji Kitamura
- Department of Bioscience, Faculty of Biotechnology, Fukui Prefectural University
| | - Kazuhiro Irie
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University
| | - Shoma Naruse
- Department of Bioscience, Faculty of Biotechnology, Fukui Prefectural University
| | - Tomohiro Matsuura
- Department of Bioscience, Faculty of Biotechnology, Fukui Prefectural University
| | - Tomoyuki Uemae
- Department of Bioscience, Faculty of Biotechnology, Fukui Prefectural University
| | - Shu Taira
- Department of Bioscience, Faculty of Biotechnology, Fukui Prefectural University
| | - Hajime Ohigashi
- Department of Bioscience, Faculty of Biotechnology, Fukui Prefectural University
| | - Shigeru Murakami
- Department of Bioscience, Faculty of Biotechnology, Fukui Prefectural University
| | - Masakazu Takahashi
- Department of Bioscience, Faculty of Biotechnology, Fukui Prefectural University
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Abstract
A molecular basis for Cl− re-absorption has not been well-characterized in salivary ductal cells. Previously, we found strong expression of a rat homologue proposed to be Ca2+-dependent Cl− channels (rCLCA) in the intralobular ducts of the rat submandibular gland. To address the question as to whether rCLCA and cystic fibrosis transmembrane conductance regulator (CFTR) are involved in Cl− re-absorption, we evaluated the electrolyte content of saliva from glands pre-treated with a small interfering RNA (siRNA). Retrograde injection into a given submandibular duct of an siRNA designed to knock down either rCLCA or CFTR reduced the expression of each of the proteins. rCLCA and CFTR siRNAs significantly increased Cl− concentration in the final saliva during pilocarpine stimulation. These results represent the first in vivo evidence for a physiological significance of rCLCA, along with CFTR, in transepithelial Cl− transport in the ductal system of the rat submandibular gland.
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Affiliation(s)
- K Ishibashi
- Department of Functional Bioscience, Fukuoka Dental College, Japan
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Kitamura K, Kinsui EZB, Abe F. Critical role of the proton-dependent oligopeptide transporter (POT) in the cellular uptake of the peptidyl nucleoside antibiotic, blasticidin S. Biochim Biophys Acta Mol Cell Res 2016; 1864:393-398. [PMID: 27916534 DOI: 10.1016/j.bbamcr.2016.11.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 11/22/2016] [Accepted: 11/29/2016] [Indexed: 11/28/2022]
Abstract
Blasticidin S (BlaS) interferes in the cell growth of both eukaryotes and prokaryotes. Its mode of action as a protein synthesis inhibitor has been investigated extensively. However, the mechanism of BlaS transport into the target cells is not understood well. Here, we show that Ptr2, a member of the proton-dependent oligopeptide transporter (POT) family, is responsible for the uptake of BlaS in yeasts Schizosaccharomyces pombe and Saccharomyces cerevisiae. Notably, some mutants of Ptr2 that are dysfunctional in dipeptide uptake were still competent to transport BlaS. Mouse-derived oligopeptide transporter PepT1 conferred BlaS sensitivity in the S. cerevisiae ptr2∆ mutant. Furthermore, bacterial POT family proteins also potentiated the BlaS sensitivity of E. coli. The role of the POT family oligopeptide transporters in the uptake of BlaS is conserved across species from bacteria to mammals.
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Affiliation(s)
- Kenji Kitamura
- Center for Gene Science, Hiroshima University, 1-4-2 Kagamiyama, Higashi-Hiroshima 739-8527, Japan.
| | | | - Fumiyoshi Abe
- Department of Chemistry and Biological Science, College of Science and Engineering, Aoyama Gakuin University, Sagamihara 252-5258, Japan
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Si D, Feng K, Kitamura K, Liu A, Pan L, Li W, Liu T, Huang Y, Liu X. Plasmon-driven surface catalysis on photochemically deposited-based SERS substrates. Appl Opt 2016; 55:8468-8471. [PMID: 27828123 DOI: 10.1364/ao.55.008468] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
For the virtues of convenience and repeatability, photochemically deposited nanoparticles (NPs) as ferroelectric-based surface-enhanced Raman scattering (SERS) substrates have great potential in the surface-plasmon-related applications. In this work, the plasmon-driven surface catalysis (PDSC) reaction is investigated on lithium niobate (LiNbO3) film with photochemically deposited Au NPs. The SERS spectra indicate that the performance of PDSC reaction on a substrate with various Au3+ concentrations in photochemical deposition is obviously different. Combining structure characterization and electromagnetic field simulation, this result is mainly attributed to the surface plasmon coupling between Au NPs. Furthermore, the results also point out that the exposure time in photochemical deposition plays an important role in PDSC reactions. Our studies on photochemically deposited Au NP substrates provide strong support and further understanding to the research on PDSC reactions and also to other surface-plasmon-related fields.
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Nakamura H, Kitamura K, Okuni A, lida Y, Ono T, Murakoshi M. MON-LB284: Panax Notoginseng Extract Containing Dammarane-Type Triterpenes Prevents Skeletal Muscle Atrophy. Clin Nutr 2016. [DOI: 10.1016/s0261-5614(16)30918-9] [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: 10/21/2022]
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Hayakawa K, Mitsumori M, Uwatoko H, Monji T, Okuno Y, Torizuka T, Satoh Y, Tanaka F, Kitamura K, Misaki T. Acute Electrolyte Disturbances in Coronary Sinus during Left Coronary Arteriography in Man. Acta Radiol 2016. [DOI: 10.1177/028418519303400306] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Electrolyte disturbances, particularly reduction of ionized calcium, induced by iodinated contrast media (CM) are important considerations in coronary arteriography. A study was conducted in 24 patients to evaluate the acute electrolyte alterations in the coronary sinus during left coronary arteriography. During left coronary arteriography, coronary sinus blood was withdrawn for measurement of electrolytes. The CM used were diatrizoate, ioxaglate, iohexol, and iopamidol. The hematocrit was decreased moderately by all 4 CM used at 5 s and returned to the control level at 15 s. The level of ionized calcium was decreased by all CM at 5 s. Prolonged reduction of ionic calcium was observed with diatrizoate and ioxaglate at 15 s. The level of potassium was almost unchanged by diatrizoate and ioxaglate in spite of hemodilution, which may lead us to a hypothesis that potassium can be released from the intracellular spaces such as red blood cells and vascular endothelial cells. Thus the depression of left ventricular function might be caused not only by reduction of ionized calcium, but also by a relative increase in the level of serum potassium.
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Kitamura K, Okuno Y, Yoshida K, Sanada M, Shiraishi Y, Muramatsu H, Kobayashi R, Furukawa K, Miyano S, Kojima S, Ogawa S, Kunishima S. Functional characterization of a novel GFI1B mutation causing congenital macrothrombocytopenia. J Thromb Haemost 2016; 14:1462-9. [PMID: 27122003 DOI: 10.1111/jth.13350] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [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: 02/01/2016] [Accepted: 04/11/2016] [Indexed: 01/04/2023]
Abstract
UNLABELLED Essentials Two groups recently reported GFI1B as a novel causative gene for congenital macrothrombocytopenia. We performed functional analysis of a novel GFI1B mutation and previous mutations. An immunofluorescence analysis of the platelet CD34 expression can be useful as a screening test. Mutant-transduced megakaryocytes produced enlarged proplatelet tips which were reduced in number. SUMMARY Background GFI1B is an essential transcription factor for megakaryocyte and erythrocyte development. Two groups have recently identified GFI1B as a novel causative gene for congenital macrothrombocytopenia associated with α-granule deficiency. Methods We performed whole exome sequencing and identified a novel GFI1B p.G272fsX274 mutation in a family with macrothrombocytopenia, and a decreased number of platelet α-granules and abnormally shaped red blood cells. p.G272fsX274 and the previous two mutations all predicted disruption of an essential DNA-binding domain in GFI1B. We therefore performed functional studies to characterize the biochemical and biological effects of these three patient-derived mutations. Results An immunofluorescence analysis revealed decreased thrombospondin-1 and increased CD34 expression in platelets from our patient. Consistent with the previous studies, the three patient-derived mutants were unable to repress the expression of the reporter gene and had a dominant-negative effect over wild-type GFI1B. In addition, the three mutations abolished recognition of a consensus-binding site in gel shift assays. Furthermore, transduction of mouse fetal liver-derived megakaryocytes with the three GFI1B mutants resulted in the production of abnormally large proplatelet tips, which were reduced in number. Conclusions Our study provides further proof of concept that GFI1B is an essential protein for the normal development of the megakaryocyte lineage.
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Affiliation(s)
- K Kitamura
- Department of Advanced Diagnosis, Clinical Research Center, National Hospital Organization Nagoya Medical Center, Nagoya, Japan
- Department of Biochemistry II, Graduate School of Medicine, Nagoya University, Nagoya, Japan
| | - Y Okuno
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - K Yoshida
- Department of Pathology and Tumor Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - M Sanada
- Department of Advanced Diagnosis, Clinical Research Center, National Hospital Organization Nagoya Medical Center, Nagoya, Japan
| | - Y Shiraishi
- Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - H Muramatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - R Kobayashi
- Pediatrics, Sapporo Hokuyu Hospital, Sapporo, Japan
| | - K Furukawa
- Department of Biomedical Sciences, Chubu University College of Life and Health Sciences, Kasugai, Japan
| | - S Miyano
- Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Laboratory of Sequence Data Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - S Kojima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - S Ogawa
- Department of Pathology and Tumor Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - S Kunishima
- Department of Advanced Diagnosis, Clinical Research Center, National Hospital Organization Nagoya Medical Center, Nagoya, Japan
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