149 results on '"Shuichi Miyamoto"'
Search Results
2. Intra-articular injection of monoiodoacetate induces diverse hip osteoarthritis in rats, depending on its dose
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Satoshi Yoh, Yuya Kawarai, Shigeo Hagiwara, Sumihisa Orita, Junichi Nakamura, Shuichi Miyamoto, Takane Suzuki, Tsutomu Akazawa, Yuki Shiko, Yohei Kawasaki, and Seiji Ohtori
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Monoiodoacetate (MIA) ,Hip OA ,Hip pain ,Animal model ,Diseases of the musculoskeletal system ,RC925-935 - Abstract
Abstract Background Monoiodoacetate (MIA)-induced arthritis models are used widely in osteoarthritis (OA) research to develop effective conservative treatments for hip OA, as an alternative to joint replacement surgery. In joint OA models, such as the MIA-induced knee OA model, various doses of MIA are utilized, depending on the purpose of the research. So far, only 2 mg of MIA has been used for MIA-induced hip OA research. We hypothesized that the amount of MIA should be adjusted according to the osteoarthritis model under investigation. We performed radiographic and histological evaluations in rats for hip OA models induced by different doses of MIA. Methods One hundred and eighty right hips of six-week-old, male Sprague–Dawley rats (n = 30 rats per group) were treated with either a single intra-articular injection of various doses of MIA (0.25, 0.5, 1.0, 2.0, and 4.0 mg) dissolved in 25 μl of sterile saline (MIA group), or with 25 μl of sterile saline alone (Sham group). Radiographic and histological evaluations of the hip joint were performed at one, two, four, eight, and 12 weeks after administration (n = 6 rats per group per time point). Results OA changes progressed from 1 week after administration in the 1.0-mg, 2.0-mg, and 4.0-mg MIA groups. The degree of OA changes increased as the dose of MIA increased. The 0.25-mg and 0.5-mg MIA groups presented fewer OA changes than the 2.0-mg and 4.0-mg MIA groups during the entire study period (up to 12 weeks). The administration of 0.25 mg and 0.5 mg of MIA-induced both radiographic and histological OA changes in a time-dependent manner, whereas more than 2 mg of MIA provoked end-stage OA at 8 weeks after injection. Absolute, dose-dependent histopathological OA changes were observed 4 weeks after MIA administration. Conclusions Intra-articular MIA injection to the hip joints of rats induced diverse OA changes dose-dependently. Research for developing novel conservative treatments for hip OA and intractable pain should consider the pathological condition when determining the dose of MIA to be employed.
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- 2022
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3. Correlation between Femoral Head Lateralization and Bone Morphology in Primary Hip Osteoarthritis
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Kenta Inagaki, Shigeo Hagiwara, Yuya Kawarai, Hiroakira Terakawa, Shuichi Miyamoto, Chiho Suzuki, Hiroyuki Yamagata, Junichi Nakamura, Seiji Ohtori, and Satoshi Iida
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Orthopedic surgery ,RD701-811 - Abstract
Background. Osteoarthritis (OA) is the most common disease of the hip in adults, and its etiology is divided into two groups: primary and secondary. Although acetabular dysplasia is the most frequent reason for total hip arthroplasty (THA) in Japan, primary OA has increased recently. Although there are two types of femoral head migration in primary OA: superior and medial, there are some patients with prominent femoral head lateralization. This study aimed at evaluating the relationship between femoral head lateralization and bone morphology of the acetabulum and proximal femur using radiographic factors in primary OA of the hip. Methods. A retrospective study was conducted between 2008 and 2017 to assess 1308 hips with OA who underwent primary THAs at our institute. The diagnostic criteria for primary OA were Crowe type 1, Sharp’s angle 25°. We classified patients with primary OA into two groups based on femoral head lateralization: group L with lateralization or group N without. Radiographic factors included Sharp’s angle, CE angle, acetabular inclination, acetabular depth ratio (ADR), acetabular head index (AHI), and femoral neck-shaft angle (FNA), all examined on an anteroposterior pelvic radiograph. Femoral neck anteversion was calculated using computerized axial tomography. Results. Primary OA was diagnosed in 210/1308 hips (16.1%) (group L: 112 hips (8.6%); group N: 98 (7.5%)). Patient demographics were not significantly different. Radiographic factors with observed significant differences between group L and group N were the average CE angle (33.0° vs. 35.1°, respectively, p = 0.009), ADR (251.6 vs. 273.4, p
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- 2023
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4. Genomic profiling of intestinal/mixed‐type superficial non‐ampullary duodenal epithelial tumors
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Shuichi Miyamoto, Goki Suda, Marin Ishikawa, Hideyuki Hayashi, Satoshi Nimura, Yoshihiro Matsuno, Ryo Mori, Shigeki Tanishima, Takahiko Kudo, Tomofumi Takagi, Yoshiya Yamamoto, Shoko Ono, Yuichi Shimizu, and Naoya Sakamoto
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duodenal cancer ,genomic testing ,next‐generation sequencing ,superficial non‐ampullary duodenal epithelial tumor ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Abstract Background and Aim The mechanism underlying carcinogenesis and the genomic features of superficial non‐ampullary duodenal epithelial tumors (SNADETs) have not been elucidated in detail. In this study, we examined the genomic features of incipient SNADETs, such as small lesions resected via endoscopic treatment, using next‐generation sequencing (NGS). Methods Twenty consecutive patients who underwent endoscopic treatment for SNADETs of less than 20 mm between January and December 2017 were enrolled. Targeted genomic sequencing was performed through NGS using a panel of 160 cancer‐related genes. Furthermore, the alteration/mutation frequencies in SNADETs were examined. Results The maximum size of the SNADETs examined in this study was 12 mm in diameter. Five SNADETs were classified as low‐grade dysplasia (LGD) tumors, while 14 SNADETs were classified as high‐grade dysplasia tumors. Only one carcinoma in situ was detected. NGS data for 16 samples were obtained. APC alterations were detected in 81% of samples (13/16). KRAS, BRAF, and TP53 alterations were detected in 25% (4/16), 18.8% (3/16), and 6.3% (1/16) of cases, respectively. Conclusion We detected APC alterations in most small SNADETs resected via endoscopic treatment, from LGD to carcinoma samples. Even in SNADETs classified as small LGD exhibited KRAS and BRAF alterations.
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- 2021
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5. Risk factors for a radiolucent line around the acetabular component with an interface bioactive bone cement technique after primary cemented total hip arthroplasty: Prognostic factors for a radiolucent line and improvement of the cement-bone interface around cemented acetabular component with an interface bioactive bone cement technique
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Shuichi Miyamoto, Satoshi Iida, Chiho Suzuki, Takushi Nakatani, Yuya Kawarai, Junichi Nakamura, Sumihisa Orita, and Seiji Ohtori
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total hip arthroplasty ,cement-bone interface ,acetabular component ,cemented ,interface bioactive bone cement technique ,hydroxyapatite ,Orthopedic surgery ,RD701-811 - Abstract
Aims: The main aims were to identify risk factors predictive of a radiolucent line (RLL) around the acetabular component with an interface bioactive bone cement (IBBC) technique in the first year after THA, and evaluate whether these risk factors influence the development of RLLs at five and ten years after THA. Methods: A retrospective review was undertaken of 980 primary cemented THAs in 876 patients using cemented acetabular components with the IBBC technique. The outcome variable was any RLLs that could be observed around the acetabular component at the first year after THA. Univariate analyses with univariate logistic regression and multivariate analyses with exact logistic regression were performed to identify risk factors for any RLLs based on radiological classification of hip osteoarthritis. Results: RLLs were detected in 27.2% of patients one year postoperatively. In multivariate regression analysis controlling for confounders, atrophic osteoarthritis (odds ratio (OR) 2.17 (95% confidence interval (CI), 1.04 to 4.49); p = 0.038) and 26 mm (OR 3.23 (95% CI 1.85 to 5.66); p < 0.001) or 28 mm head diameter (OR 3.64 (95% CI 2.07 to 6.41); p < 0.001) had a significantly greater risk for any RLLs one year after surgery. Structural bone graft (OR 0.19 (95% CI 0.13 to 0.29) p < 0.001) and location of the hip centre within the true acetabular region (OR 0.15 (95% CI 0.09 to 0.24); p < 0.001) were significantly less prognostic. Improvement of the cement-bone interface including complete disappearance and poorly defined RLLs was identified in 15.1% of patients. Kaplan-Meier survival analysis for the acetabular component at ten years with revision of the acetabular component for aseptic loosening as the end point was 100.0% with a RLL and 99.1% without a RLL (95% CI 97.9 to 100). With revision of the acetabular component for any reason as the end point, the survival rate was 99.2% with a RLL (95% CI 97.6 to 100) and 96.5% without a RLL (95% CI 93.4 to 99.7). Conclusion: This study demonstrates that acetabular bone quality, head diameter, structural bone graft, and hip centre position may influence the presence of the any RLL.
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- 2021
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6. Capnocytophaga canimorsus infection led to progressively fatal septic shock in an immunocompetent patient
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Ryuichi Nakayama, Shuichi Miyamoto, Toshihiro Tawara, Arisa Aoyagi, Takeo Oguro, Nobumichi Kobayashi, Michio Suzuki, and Yoshihiro Takeyama
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Capnocytophaga canimorsus ,disseminated intravascular coagulation ,dog bite ,metabolic acidosis ,septic shock ,Medical emergencies. Critical care. Intensive care. First aid ,RC86-88.9 - Abstract
Background Capnocytophaga canimorsus infection is rare, with a high fatality rate; however, there are few cases of death with a rapid course. This study reports a progressively fatal case of C. canimorsus. Case Presentation A 68‐year‐old immunocompetent Japanese man was bitten and scratched on his right hand by a dog 6 days before emergency transportation to the emergency room with abdominal pain, back pain, and melena. The patient developed multiple‐organ failure. Despite antibiotic therapy, transfusion, vasopressor therapy, and continuous renal replacement therapy, the patient died from uncontrolled metabolic acidosis 4.5 h after admission. Approximately 80 h after admission, blood cultures were positive for C. canimorsus. Conclusions Capnocytophaga canimorsus infection can lead to rapid progression even in immunocompetent patients.
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- 2022
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7. Effect of switching from tenofovir disoproxil fumarate to tenofovir alafenamide on lipid profiles in patients with hepatitis B.
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Kazuharu Suzuki, Goki Suda, Yoshiya Yamamoto, Satoshi Abiko, Kenji Kinoshita, Shuichi Miyamoto, Ryo Sugiura, Megumi Kimura, Osamu Maehara, Ren Yamada, Takashi Kitagataya, Taku Shigesawa, Masatsugu Ohara, Naoki Kawagishi, Masato Nakai, Takuya Sho, Mitsuteru Natsuizaka, Kenichi Morikawa, Koji Ogawa, and Naoya Sakamoto
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Medicine ,Science - Abstract
For long-term treatment of hepatitis B virus (HBV) infection, switching from tenofovir-disoproxil-fumarate (TDF) to tenofovir-alafenamide (TAF) may prevent renal dysfunction and bone loss. However, the precise effects of this switch on the blood lipid profile remain to be clarified. This is an important issue as TDF is known to have effects on both low- and high-density lipids. Therefore, our retrospective multi-center study aimed to evaluate the effects of switching from TDF to TAF on the lipid profile of patients with HBV infection. Samples were obtained prior to the switch from TDF to TAF and at 6-12 months after TAF initiation. In some cases, additional samples obtained pre- and post-TDF administration were available for analysis. Serum cholesterol levels, including oxidized-low-density lipoprotein (LDL) and non-high-density lipoprotein-cholesterol (HDL-c), and the rate of dyslipidemia, according to the NCEP-ATP III lipid risk classification, were analyzed. The data from 69 patients were analyzed, including 33 patients with pre- and post-TDF-initiation serum samples. Total cholesterol (T-chol), HDL-c, LDL-c, non-HDL-c, and oxidized LDL levels increased significantly after switching to TAF. With regard to sequential changes pre- to post-TAF, TDF was associated with significantly lower serum T-chol, HDL-c, and oxidized LDL-c levels, with T-chol, HDL-c, LDL-c, and oxidized LDL-c levels increasing significantly after the switch. The switch from TDF to TAF was also associated with an increase in the rate of dyslipidemia, from 33% to 39%, with an increase in the rate of severe dyslipidemia of 1.4% and 5.8%, based on T-chol and LDL-c levels. Of note, no cases of severe dyslipidemia were detected pre-TAF treatment. As oxidized LDL-c and non-HDL-c are strongly associated with atherosclerosis development, careful monitoring of lipid is needed after switching from TDF to TAF in this clinical population.
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- 2022
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8. Triple-loop clip for the traction-assisted colorectal endoscopic submucosal dissection: multidirectional triple-loop traction method
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Shuichi Miyamoto, MD, PhD, Tomohiko R. Ohya, MD, PhD, Masayoshi Ono, MD, PhD, and Naoya Sakamoto, MD, PhD
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Diseases of the digestive system. Gastroenterology ,RC799-869 - Published
- 2021
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9. Associated injury complicated by pediatric lower limb shaft fractures and clinical efficacy of flexible stainless-steel intramedullary nailing in children less than 15 years old
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Shuichi Miyamoto, Makoto Otsuka, Fumio Hasue, Takayuki Fujiyoshi, Koushirou Kamiya, Hitoshi Kiuchi, Takuma Odagiri, Tadashi Tanaka, Junichi Nakamura, Sumihisa Orita, and Seiji Ohtori
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pediatric, lower limb shaft fracture, associated injury, clinical result, intramedullary nail ,Orthopedic surgery ,RD701-811 - Abstract
Although pediatric lower limb shaft fractures are common, little is known about associated injuries. The purpose of this study was to examine associated injuries complicated by pediatric lower limb shaft fractures and the efficacy of surgical treatment using a flexible stainless-steel intramedullary Ender nail in children less than 15 years old. This is a retrospective review of 29 children younger than 15 years old who were diagnosed with femoral or tibial shaft fractures and treated using Ender nails from 2005 to 2016. Baseline data, etiology, associated injuries, fracture site and patterns, operative and post-operative assessment were evaluated. The average age of the patients was 9.0 years, and mean follow-up was 18.2 months. Eleven patients (79%) had associated injury. At the final follow up, six patients (43%) sustained complications associated with the insertion area of the nail. There was no evidence of deep infection or nonunion at either fracture site. The clinical results were excellent in 10 (67%) fractures, and good in 5 (33%) fractures, based on the modified Flynn criteria. Almost all patients with a femoral fracture had an associated injury including abdominal visceral injury, cerebral contusion or other fractures. This study indicated good clinical and functional outcomes. On the other hand, the minor complications rate was high. Nevertheless, elastic stable intramedullary nailing recently has become available in Japan, and a prospective and comparative study is needed.
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- 2021
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10. Unstable AO/OTA type 31-A1.2 intertrochanteric femur fracture: An unusual case report
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Shuichi Miyamoto, Satoshi Iida, Takushi Nakatani, Hiroyuki Yamagata, Junichi Nakamura, Sumihisa Orita, and Seiji Ohtori
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AO/OTA type 31-A1.2 ,Intertrochanteric femoral fracture ,Fixation instability ,Cephalomedullary nail ,95o–angled blade plate ,Surgery ,RD1-811 - Abstract
AO/OTA type 31-A1.2 intertrochanteric femoral fractures generally are considered stable intertrochanteric fractures. We report a case of an unstable AO/OTA type 31-A1.2 intertrochanteric femoral fracture. Primary internal fixation was performed with a long cephalomedullary nail taking instability into account. Postoperative X-rays showed an acceptable reduction with a slight fracture gap in extension on the lateral trochanteric side. However, additional salvage surgery was required because the long cephalomedullary nail broke as a result of the instability caused by non-union and varus deformity of the proximal femur. More attention should be directed to strategies of primary internal fixation including choice of fixation instrumentation in terms of mechanical stability because this type of fracture can be remarkably unstable despite radiographic diagnosis of a usually stable AO/OTA classification type 31-A1.2 fracture.
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- 2020
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11. Crystal structure analysis of human serum albumin complexed with sodium 4-phenylbutyrate
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Akito Kawai, Keishi Yamasaki, Taisuke Enokida, Shuichi Miyamoto, and Masaki Otagiri
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Biology (General) ,QH301-705.5 ,Biochemistry ,QD415-436 - Abstract
Sodium 4-phenylbutyrate (PB) is an orphan drug for the treatment of urea cycle disorders. It also inhibits the development of endoplasmic reticulum stress, the action of histone deacetylases and as a regulator of the hepatocanalicular transporter. PB is generally considered to have the potential for use in the treatment of the diseases such as cancer, neurodegenerative diseases and metabolic diseases. In a previous study, we reported that PB is primarily bound to human serum albumin (HSA) in plasma and its binding site is drug site 2. However, details of the binding mode of PB to HSA remain unknown. To address this issue, we examined the crystal structure of HSA with PB bound to it. The structure of the HSA–PB complex indicates that the binding mode of PB to HSA is quite similar to that for octanoate or drugs that bind to drug site 2, as opposed to that for other medium-chain length of fatty acids. These findings provide useful basic information related to drug–HSA interactions. Moreover, the information presented herein is valuable in terms of providing safe and efficient treatment and diagnosis in clinical settings. Keywords: Human serum albumin, X-ray crystallography, Sodium 4-phenylbutyrate, Drug interaction, Drug site 2
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- 2018
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12. Molecular Modeling to Estimate the Diffusion Coefficients of Drugs and Other Small Molecules
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Shuichi Miyamoto and Kazumi Shimono
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diffusion coefficient ,molecular radius ,molecular modeling ,Stokes-Einstein equation ,Organic chemistry ,QD241-441 - Abstract
Diffusion is a spontaneous process and one of the physicochemical phenomena responsible for molecular transport, the rate of which is governed mainly by the diffusion coefficient; however, few coefficients are available because the measurement of diffusion rates is not straightforward. The translational diffusion coefficient is related by the Stokes–Einstein equation to the approximate radius of the diffusing molecule. Therefore, the stable conformations of small molecules were first calculated by molecular modeling. A simple radius rs and an effective radius re were then proposed and estimated using the stable conformers with the van der Waals radii of atoms. The diffusion coefficients were finally calculated with the Stokes–Einstein equation. The results showed that, for the molecules with strong hydration ability, the diffusion coefficients are best given by re and for other compounds, rs provided the best coefficients, with a reasonably small deviation of ~0.3 × 10−6 cm2/s from the experimental data. This demonstrates the effectiveness of the theoretical estimation approach, suggesting that diffusion coefficients have potential use as an additional molecular property in drug screening.
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- 2020
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13. Enrichment of mutant strains after eradication therapy analyzed by gastric wash–based quantitative pyrosequencing
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Ritsuko Oikawa, Yoshiyuki Watanabe, Shuichi Miyamoto, Yoshinori Sato, Shoko Ono, Katsuhiro Mabe, Hiroyuki Yamamoto, Mototsugu Kato, and Fumio Itoh
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Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
The eradication of Helicobacter pylori reduces the risk of gastric cancer. A clear understanding of the factors underlying mixed infection with multiple clarithromycin-susceptible and clarithromycin-resistant H. pylori strains is necessary to design more effective therapies against H. pylori . We aimed to assess how the abundance and prevalence of H. pylori strains vary after clarithromycin-based eradication therapy. Using gastric wash samples, which represent the entire stomach, we sequentially analyzed the abundance and prevalence of H. pylori DNA by 23S ribosomal RNA pyrosequencing before and 1, 2, and 3 years after eradication therapy. Low levels of H. pylori DNA were still detectable at the first-year follow-up in all samples with negative post-treatment urea breath test results. The abundance of H. pylori DNA decreased significantly until the 2-year follow-up, but it switched to an increase at the 3-year follow-up. Importantly, the ratio of the prevalence of mutant strains to the prevalence of wild-type strains had already increased at the first-year follow-up and continued to increase, suggesting the selection and growth of clarithromycin-resistant strains during the follow-up periods. Being sensitive and representative, our assay will be useful in effectively addressing gastric cancer development by enhancing the long-term success of intervention strategies and consecutive surveillance for H. pylori eradication.
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- 2017
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14. Acute Traumatic Patellar Tendon Rupture at the Tibial Tuberosity Attachment without Avulsion Fracture
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Shuichi Miyamoto, Makoto Otsuka, Fumio Hasue, Takayuki Fujiyoshi, Koushirou Kamiya, Hitoshi Kiuchi, Ken Ohara, Atsushi Yunde, Yasunori Toki, Tadashi Tanaka, Junichi Nakamura, and Seiji Ohtori
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Orthopedic surgery ,RD701-811 - Abstract
Patellar tendon rupture in children is especially rare. The fact that the area of traumatic rupture has wide variations makes surgical treatment difficult. We present an 11-year-old boy with acute traumatic patellar tendon rupture at the tibial tuberosity attachment without avulsion fracture. Primary end-to-end repair and reinforcement using 1.5 mm stainless steel wires as a surgical strategy were undertaken. Early range of motion began with a functional knee brace and the reinforced stainless wire was removed 3 months after surgery. Knee function at the final follow-up was satisfactory. We suggest that this strategy may provide a useful option for surgical treatment.
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- 2017
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15. Femoral Varus Osteotomy for Hip Instability after Traumatic Fracture Dislocations of the Hip Associated with Femoral Head Fractures: A Report of Two Cases
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Shuichi Miyamoto, Junichi Nakamura, Satoshi Iida, Chiho Suzuki, Seiji Ohtori, Sumihisa Orita, and Kazuhisa Takahashi
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Orthopedic surgery ,RD701-811 - Abstract
Fracture of the femoral head and the acetabulum with traumatic dislocation of the hip is a severe injury representing various types and unfavorable outcome. We showed a 45-year-old man with Pipkin type-IV fracture and coxa valga. An immediate closed reduction was achieved followed by open reduction and internal fixation via a posterior approach 6 days later. However, dislocation occurred three times without traumatic events after three weeks. CT demonstrated no displacement of posterior fragments or implant failure. Femoral intertrochanteric varus osteotomy was performed to gain concentric stability and successfully resolved recurrent dislocation. Another 45-year-old woman with Pipkin type-IV fracture and coxa valga also underwent closed reduction initially and then continued conservative treatment. After eight weeks, when she started gait training, progressive pain became symptomatic. Persistent hip pain at weight bearing was not improved in spite of arthroscopic synovectomy and osteochondroplasty. Two years after injury, femoral intertrochanteric varus osteotomy was indicated and her refractory pain was resolved gradually. We suggest that femoral varus osteotomy should be considered for superolateral subluxation associated fracture dislocation of the hip in Pipkin type-IV and coxa valga.
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- 2016
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16. Estimation of the Diffusion Coefficients of Small Molecules by Diffusion Measurements with Agar-gel and Theoretical Molecular Modeling
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Shuichi Miyamoto and Kazumi Shimono
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Biochemistry - Published
- 2022
17. Mechanism of Chronic Pain of Symptomatic Hip Osteoarthritis by Association of its Distribution, Nociceptive, Neuropathic, Nociplastic, or Mixed-pain Screening, and the Prevalence of Lumbar Spinal Stenosis
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Kei Katou, Shuichi Miyamoto, Satoshi Iida, Seiji Ohtori, Yuya Kawarai, Junichi Nakamura, Tomohiro Miyashita, and Sumihisa Orita
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Nociception ,musculoskeletal diseases ,medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,Cross-sectional study ,Chronic pain ,Lumbar spinal stenosis ,Magnetic resonance imaging ,Osteoarthritis ,Thigh ,medicine.disease ,Osteoarthritis, Hip ,Cross-Sectional Studies ,Spinal Stenosis ,medicine.anatomical_structure ,Neuropathic pain ,Prevalence ,medicine ,Physical therapy ,Humans ,Prospective Studies ,Chronic Pain ,business - Abstract
OBJECTIVES The pain of hip osteoarthritis is generally recognized as nociceptive in origin because of the local pathology. However, some patients with osteoarthritis experience a neuropathic pain component as an essential part of some nociplastic pain subtype. Here, we sought to examine the mechanism of chronic pain of symptomatic hip osteoarthritis by association of its distribution, complex pain mechanism screening, and the prevalence of lumbar spinal stenosis (LSS). METHODS We conducted a prospective cross-sectional study of 100 hips in 100 patients with symptomatic hip osteoarthritis in a chronic state. We examined all baseline clinical characteristics including clinical and functional score, location of pain and numbness, and pain score (PainDETECT questionnaire (PDQ) and the Leeds Assessment of Neuropathic Symptoms and Signs (LANSS)), and magnetic resonance imaging of the hip and lumbar spine. RESULTS The PDQ and LANSS revealed that 23% of the patients had a neuropathic pain component. There were 24 variations of the pain pattern. By contrast, the pain localized around the hip joint was only 15%. Pain distal to the thigh and any numbness was significantly more frequent in the group with neuropathic pain (P
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- 2021
18. Red dichromatic imaging improved the visibility of exposed blood vessels in gastric ulcer induced by endoscopic submucosal dissection– a pilot study
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shuichi miyamoto, Masayoshi Ono, Ryo Sugiura, Masayuki Higashino, Goki Suda, Lisako Kohya, Kazuharu Suzuki, Koji Hirata, Satoshi Abiko, Kenji Kinoshita, Hiromi Hirata, Kazuteru Hatanaka, Yoshiya Yamamoto, Hirohito Naruse, Shoko Ono, and Naoya Sakamoto
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Background One of the major complications of gastric endoscopic submucosal dissection (ESD) is delayed bleeding. The treatment of exposed vessels after completed dissection should be effective to avoid delayed bleeding. However, it’s sometimes difficult to detect the detection of exposed blood vessels on ulcers induced by ESD. A recent study reported that red dichromatic imaging (RDI) was useful for detecting exposed vessels. In this study, we aimed to measure the visibility of exposed vessels and the quantitative color difference between the exposed vessels and surrounding tissue on ulcers, as observed using RDI after completed dissection. Methods Sixty-four vessels (14 patients) in gastric ESD-induced ulcers were evaluated using both white light imaging (WLI) and RDI. The Commission Internationale de l’Eclairage 1976 (L*a*b*) color space was used to measure the color difference. The color difference was evaluated by comparing the color values of regions of interest for the point of an exposed vessel and three points surrounding an exposed vessel. The visibility of exposed vessels was evaluated using a visibility scoring system. The primary endpoint was color differences (ΔE) between the exposed vessels and surrounding tissue in each modality. Results The average ΔE values (± SEM) for WLI and RDI were 24.85 (± 1.19) and 31.83(± 1.31), respectively. The ΔE value for RDI was significantly higher than that for WLI (p < 0.01). The visibility score was improved in 54.7% (35/64) of cases. Conclusions The color differences between the exposed vessels and surrounding tissue on gastric ESD-induced ulcers were higher with RDI than with WLI, and RDI improved the visibility of exposed vessels.
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- 2022
19. Genomic profiling of intestinal/mixed‐type superficial non‐ampullary duodenal epithelial tumors
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Shoko Ono, Hideyuki Hayashi, Yoshiya Yamamoto, Marin Ishikawa, Tomofumi Takagi, Ryo Mori, Shigeki Tanishima, Yuichi Shimizu, Satoshi Nimura, Goki Suda, Shuichi Miyamoto, Yoshihiro Matsuno, Takahiko Kudo, and Naoya Sakamoto
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Pathology ,medicine.medical_specialty ,Genomic profiling ,Mixed type ,next‐generation sequencing ,RC799-869 ,medicine.disease_cause ,genomic testing ,duodenal cancer ,medicine ,Carcinoma ,superficial non-ampullary duodenal epithelial tumor ,Hepatology ,business.industry ,Carcinoma in situ ,Gastroenterology ,Original Articles ,Diseases of the digestive system. Gastroenterology ,medicine.disease ,Dysplasia ,next-generation sequencing ,Original Article ,KRAS ,Duodenal cancer ,Carcinogenesis ,business ,superficial non‐ampullary duodenal epithelial tumor - Abstract
Background and Aim The mechanism underlying carcinogenesis and the genomic features of superficial non‐ampullary duodenal epithelial tumors (SNADETs) have not been elucidated in detail. In this study, we examined the genomic features of incipient SNADETs, such as small lesions resected via endoscopic treatment, using next‐generation sequencing (NGS). Methods Twenty consecutive patients who underwent endoscopic treatment for SNADETs of less than 20 mm between January and December 2017 were enrolled. Targeted genomic sequencing was performed through NGS using a panel of 160 cancer‐related genes. Furthermore, the alteration/mutation frequencies in SNADETs were examined. Results The maximum size of the SNADETs examined in this study was 12 mm in diameter. Five SNADETs were classified as low‐grade dysplasia (LGD) tumors, while 14 SNADETs were classified as high‐grade dysplasia tumors. Only one carcinoma in situ was detected. NGS data for 16 samples were obtained. APC alterations were detected in 81% of samples (13/16). KRAS, BRAF, and TP53 alterations were detected in 25% (4/16), 18.8% (3/16), and 6.3% (1/16) of cases, respectively. Conclusion We detected APC alterations in most small SNADETs resected via endoscopic treatment, from LGD to carcinoma samples. Even in SNADETs classified as small LGD exhibited KRAS and BRAF alterations., APC alterations were detected in most small superficial non‐ampullary duodenal epithelial tumors (SNADETs) resected via endoscopic treatment. Even in SNADETs classified as small low‐grade dysplasia, KRAS and BRAF alterations were present in a few samples.
- Published
- 2021
20. Hepatocellular Carcinoma Rupture after Introducing Lenvatinib: An Autopsy Case Report
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Risako Kohya, Ryo Sugiura, Yoshiya Yamamoto, Hirohito Naruse, Kazuteru Hatanaka, Kenji Kinoshita, Satoshi Abiko, Shuichi Miyamoto, Kazuharu Suzuki, Hanae Kushibiki, Satoru Munakata, and Norihiko Shimoyama
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adverse effect ,autopsy case ,Internal Medicine ,General Medicine ,hepatocellular carcinoma ,lenvatinib - Abstract
Hepatocellular carcinoma (HCC) hemorrhaging/rupture is a rare adverse effect of lenvatinib, and only limited pathological examinations have been reported. This report presents the case of a 69-year-old man who suffered from cardiac arrest and died 7 days after starting lenvatinib treatment for HCC, with an autopsy subsequently performed. Crack and coagulated blood were observed in the largest tumor. Pathologically, the hemorrhaging area was scattered in nearly all of the HCC lesions, regardless of tumor differentiation. This pathological feature is unusual in normal HCC. Thus, it is believed to have been the effect of lenvatinib.
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- 2022
21. Risk factors for a radiolucent line around the acetabular component with an interface bioactive bone cement technique after primary cemented total hip arthroplasty: Prognostic factors for a radiolucent line and improvement of the cement-bone interface around cemented acetabular component with an interface bioactive bone cement technique
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Sumihisa Orita, Yuya Kawarai, Takushi Nakatani, Seiji Ohtori, Junichi Nakamura, Satoshi Iida, Shuichi Miyamoto, and Chiho Suzuki
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musculoskeletal diseases ,total hip arthroplasty ,Radiodensity ,acetabular component ,Dentistry ,03 medical and health sciences ,interface bioactive bone cement technique ,0302 clinical medicine ,Medicine ,Orthopedics and Sports Medicine ,030212 general & internal medicine ,Orthopedic surgery ,030222 orthopedics ,business.industry ,hydroxyapatite ,Bone cement ,equipment and supplies ,cement-bone interface ,surgical procedures, operative ,Acetabular component ,cemented ,Surgery ,Line (text file) ,business ,RD701-811 ,Total hip arthroplasty - Abstract
AimsThe main aims were to identify risk factors predictive of a radiolucent line (RLL) around the acetabular component with an interface bioactive bone cement (IBBC) technique in the first year after THA, and evaluate whether these risk factors influence the development of RLLs at five and ten years after THA.MethodsA retrospective review was undertaken of 980 primary cemented THAs in 876 patients using cemented acetabular components with the IBBC technique. The outcome variable was any RLLs that could be observed around the acetabular component at the first year after THA. Univariate analyses with univariate logistic regression and multivariate analyses with exact logistic regression were performed to identify risk factors for any RLLs based on radiological classification of hip osteoarthritis.ResultsRLLs were detected in 27.2% of patients one year postoperatively. In multivariate regression analysis controlling for confounders, atrophic osteoarthritis (odds ratio (OR) 2.17 (95% confidence interval (CI), 1.04 to 4.49); p = 0.038) and 26 mm (OR 3.23 (95% CI 1.85 to 5.66); p < 0.001) or 28 mm head diameter (OR 3.64 (95% CI 2.07 to 6.41); p < 0.001) had a significantly greater risk for any RLLs one year after surgery. Structural bone graft (OR 0.19 (95% CI 0.13 to 0.29) p < 0.001) and location of the hip centre within the true acetabular region (OR 0.15 (95% CI 0.09 to 0.24); p < 0.001) were significantly less prognostic. Improvement of the cement-bone interface including complete disappearance and poorly defined RLLs was identified in 15.1% of patients. Kaplan-Meier survival analysis for the acetabular component at ten years with revision of the acetabular component for aseptic loosening as the end point was 100.0% with a RLL and 99.1% without a RLL (95% CI 97.9 to 100). With revision of the acetabular component for any reason as the end point, the survival rate was 99.2% with a RLL (95% CI 97.6 to 100) and 96.5% without a RLL (95% CI 93.4 to 99.7).ConclusionThis study demonstrates that acetabular bone quality, head diameter, structural bone graft, and hip centre position may influence the presence of the any RLL. Cite this article: Bone Joint Open 2021;2(5):278–292.
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- 2021
22. Hepatocellular Carcinoma Rupture after Introducing Lenvatinib: An Autopsy Case Report.
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Risako Kohya, Ryo Sugiura, Yoshiya Yamamoto, Hirohito Naruse, Kazuteru Hatanaka, Kenji Kinoshita, Satoshi Abiko, Shuichi Miyamoto, Kazuharu Suzuki, Hanae Kushibiki, Satoru Munakata, and Norihiko Shimoyama
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- 2023
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23. Minimum 5 year follow-up of clinical and radiographic results of cemented acetabular components with an interface bioactive bone cement technique in primary cemented total hip arthroplasty
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Takushi Nakatani, Satoshi Iida, Junichi Nakamura, Yuya Kawarai, Chiho Suzuki, Shuichi Miyamoto, Sumihisa Orita, and Seiji Ohtori
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musculoskeletal diseases ,medicine.medical_specialty ,5 year follow up ,Arthroplasty, Replacement, Hip ,Radiodensity ,Radiography ,Aseptic loosening ,Dentistry ,03 medical and health sciences ,0302 clinical medicine ,medicine ,Humans ,Orthopedics and Sports Medicine ,Retrospective Studies ,030222 orthopedics ,business.industry ,Bone Cements ,Acetabulum ,030229 sport sciences ,General Medicine ,musculoskeletal system ,equipment and supplies ,Bone cement ,surgical procedures, operative ,Radiological weapon ,Orthopedic surgery ,Hip Joint ,Surgery ,Hip Prosthesis ,business ,Total hip arthroplasty - Abstract
A well-fixed cement–bone interface is a crucial factor for acetabular and femoral components in cemented total hip arthroplasty (THA). The aim of the present study was to evaluate the middle-term clinical and radiological results of fixing the acetabular component with an interface bioactive bone cement (IBBC) technique in primary cemented THA. We undertook a retrospective review was undertaken of 193 primary cemented THAs in 174 patients using acetabular components cemented with an IBBC technique and followed for a minimum of 5 years (mean 8.3 years; range 5–17 years). Baseline data, clinical and radiological outcomes were evaluated. Japanese Orthopedic Association hip score and modified Harris hip scores demonstrated significant clinical improvement in all patients (p
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- 2020
24. Liver Enzyme Elevation Related to Human Parainfluenza Virus Type 3 Infection
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Yoshimasa, Kudo, Tomohiro, Wakabayashi, Shuichi, Miyamoto, Yuta, Sasaoka, Yoshiyuki, Sakai, and Takeshi, Tsugawa
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Microbiology (medical) ,Paramyxoviridae Infections ,Infectious Diseases ,Liver ,Pediatrics, Perinatology and Child Health ,Humans ,Child ,Respiratory Tract Infections ,Parainfluenza Virus 1, Human ,Parainfluenza Virus 3, Human - Abstract
The human parainfluenza viruses are common causes of upper and lower respiratory tract infection; however, nonrespiratory infections with human parainfluenza viruses are rare, and there are no reports of pediatric cases of liver enzyme elevation. We present 2 pediatric patients who developed liver enzyme elevation related to human parainfluenza virus type 3 infection.
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- 2022
25. Corrigendum to ’The influence of calcar collar and surface finish in the cemented femoral component on the incidence of postoperative periprosthetic femoral fracture at a minimum of five years after primary total hip arthroplasty’ [Injury 53 (2022) 2247–2258]
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Shuichi Miyamoto, Satoshi Iida, Chiho Suzuki, Yuya Kawarai, Junichi Nakamura, Sumihisa Orita, and Seiji Ohtori
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General Earth and Planetary Sciences ,General Environmental Science - Published
- 2022
26. Minimum 10-Year Follow-Up of Total Hip Arthroplasty With a Collarless Triple-Tapered Polished Cemented Stem With Line-to-Line Implantation Using a Direct Anterior Approach
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Shuichi Miyamoto, Satoshi Iida, Chiho Suzuki, Taisei Kawamoto, Yoshiyuki Shinada, and Seiji Ohtori
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Reoperation ,Treatment Outcome ,Arthroplasty, Replacement, Hip ,Humans ,Orthopedics and Sports Medicine ,Femur ,Hip Prosthesis ,Prosthesis Design ,Follow-Up Studies ,Prosthesis Failure ,Retrospective Studies - Abstract
The Trilliance stem (B. Braun-Aesculap, Tuttlingen, Germany), a novel collarless triple-tapered polished stem, was introduced in 2009. The aim of this study is to evaluate the long-term clinical and radiological results of the Trilliance stem with line-to-line implantation in primary total hip arthroplasty using a direct anterior approach.A consecutive retrospective series of 130 patients (151 hips) who underwent total hip arthroplasty between February 2009 and August 2011 were evaluated for a minimum of 10 years. Of these, 87.4% had a diagnosis of secondary osteoarthritis based on developmental hip dysplasia. Clinical and radiological results, complications were evaluated and survival analysis was performed.The mean follow-up was 10.7 years (range, 10.0-12.1). Thirteen hips (13 patients, 6.8%) were lost to follow-up. Adequate cementation (Barrack grade A) was achieved in 136 hips (93.8%) 1 week post-operatively. Nearly all (144 hips, 99.3%) had been inserted within the range of 3°. No significant differences were identified between high- (≥30 procedures/year) and low- (30 procedures/year) volume surgeons. The Kaplan-Meier survival analysis with revision of the femoral component for aseptic loosening, revision of the femoral component for any reason and revision of either component for any reason as the end points, cumulative survivorship was 100.0%, 97.6% (95% confidence interval (CI) 95.4-100.0) and 96.5% (95% CI 93.8-99.3) at 10 years, respectively.The Trilliance stem with line-to-line implantation using a direct anterior approach has an excellent clinical and radiological outcome at a minimum of 10 years' follow-up.Level IV, Retrospective cohort study.
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- 2022
27. Percutaneous Retrieval of an Inferior Vena Cava Filter Penetrating Into the Duodenum
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Jiro Koya, Yutaro Yasui, Kazuya Sugitatsu, Kazuharu Suzuki, Shuichi Miyamoto, Yusuke Tokuda, Hiroyuki Gibo, Yasuhiro Makita, Morio Shoda, and Shota Saito
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medicine.medical_specialty ,Vena Cava Filters ,Percutaneous ,Duodenum ,business.industry ,Ivc filter ,Inferior vena cava filter ,Vena Cava, Inferior ,Treatment Outcome ,medicine.anatomical_structure ,medicine ,Humans ,Radiology ,Cardiology and Cardiovascular Medicine ,business ,Device Removal ,Retrospective Studies - Published
- 2021
28. Stereotyped Upper Limb Movement in MECP2 Duplication Syndrome
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Satoru Takahashi, Kosuke Tsuchida, Takeshi Tsugawa, Shuichi Miyamoto, Yoshiyuki Sakai, Yukihiko Kawasaki, Tomohiro Wakabayashi, Shinobu Fukumura, Shinsuke Kato, and Kenji Kurosawa
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congenital, hereditary, and neonatal diseases and abnormalities ,medicine.diagnostic_test ,business.industry ,Movement (music) ,MECP2 duplication syndrome ,Electroencephalography ,medicine.disease ,nervous system diseases ,Xq28 ,Epilepsy ,medicine.anatomical_structure ,medicine ,Upper limb ,Neurology (clinical) ,Abnormality ,business ,Neuroscience ,Comparative genomic hybridization - Abstract
A 23-year-old man had epilepsy, mental retardation, and a stereotyped movement (figure 1 and video1), which was exacerbated by emotion. No abnormality was detected in the EEG during this movement. Array comparative genomic hybridization showed a Xq28 duplication: arr[GRCh37]Xq28(153032004_153406233)x2 (figure 2).
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- 2021
29. Postoperative migration of the anatomical and functional anteversion angle following total hip arthroplasty with a well-fixed cemented femoral component with line-to-line implantation
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Chiho Suzuki, Seiji Ohtori, Yuya Kawarai, Sumihisa Orita, Junichi Nakamura, Takushi Nakatani, Satoshi Iida, and Shuichi Miyamoto
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Male ,Arthroplasty, Replacement, Hip ,Axial rotation ,Patient Positioning ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,Imaging, Three-Dimensional ,Postoperative Complications ,0302 clinical medicine ,Japan ,Image Processing, Computer-Assisted ,medicine ,Humans ,Orthopedics and Sports Medicine ,Femur ,Stem subsidence ,Femoral component ,Retrospective Studies ,Postoperative Care ,030222 orthopedics ,business.industry ,Middle Aged ,Prosthesis Failure ,External rotation ,Significant positive correlation ,Female ,Surgery ,Hip Prosthesis ,Contracture ,medicine.symptom ,Tomography, X-Ray Computed ,Nuclear medicine ,business ,Total hip arthroplasty - Abstract
Little is known about the association between well-fixed polished tapered cemented stems (PTCS) implanted by the line-to-line technique and changes of stem migration, or the change of functional anteversion of the femur after total hip arthroplasty (THA). This retrospective study included 422 two-stage bilateral primary THAs performed using PTCS implanted by the line-to-line technique. CT scans were made on both the target side (first postoperative CT) and on the contralateral side (second postoperative CT) 1 week postoperatively. The mean follow-up was 7.8 months. CT data for each scan were transferred to 3D template software (Zed hip, Lexi, Japan). The postoperative changes of anatomical stem anteversion (ASA), functional femoral anteversion (FFA), and stem subsidence were evaluated. A total of 20 THAs with CT scans were available on 3D template software. The ASA and the FFA had migrated − 0.68° ± 0.62° and − 5.5° ± 9.7°, respectively, over the follow-up period. A significant positive correlation was observed between the change of subsidence and ASA (r2 = 0.34, p = 0.007), between the FFA on the second postoperative CT and ASA on the first postoperative CT (r2 = 0.26, p = 0.02) and between the FFA on the second postoperative CT and FFA on the first postoperative CT (r2 = 0.52, p = 0.0003). This study indicates that the change in axial rotation of a PTCS implanted by the line-to-line technique was less than that reported by other studies and the preoperative external rotation contracture was substantially improved after THA.
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- 2020
30. Analgesic Effect of Duloxetine on an Animal Model of Monosodium Iodoacetate‐Induced Hip Osteoarthritis
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Miyako Suzuki, Kazuhide Inage, Yuya Kawarai, Takane Suzuki, Junichi Nakamura, Tsutomu Akazawa, Shuichi Miyamoto, Sumihisa Orita, Shigeo Hagiwara, Takayuki Nakajima, and Seiji Ohtori
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Male ,Spinal Cord Dorsal Horn ,medicine.medical_specialty ,Calcitonin Gene-Related Peptide ,medicine.medical_treatment ,0206 medical engineering ,Drug Evaluation, Preclinical ,02 engineering and technology ,Duloxetine Hydrochloride ,Inhibitory postsynaptic potential ,Osteoarthritis, Hip ,Rats, Sprague-Dawley ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Ganglia, Spinal ,Internal medicine ,medicine ,Animals ,Duloxetine ,Orthopedics and Sports Medicine ,Saline ,030203 arthritis & rheumatology ,Analgesics ,Microglia ,business.industry ,Spinal cord ,020601 biomedical engineering ,Iodoacetic Acid ,Disease Models, Animal ,Endocrinology ,medicine.anatomical_structure ,chemistry ,Calcitonin ,Neuropathic pain ,Hyperalgesia ,Hip Joint ,medicine.symptom ,business - Abstract
We investigated the efficacy of duloxetine on hyperalgesia, histopathological and radiographic findings, pain-related sensory innervation of dorsal-root ganglia (DRG), and spinal changes in a rat model of induced hip osteoarthritis (OA). The right hip joints of male Sprague-Dawley rats (n = 6 rats/group) in the Sham group were injected with 25 μl of sterile saline and 25 μl of sterile saline with 2 mg of monosodium iodoacetate (MIA) were injected to the MIA + Vehicle and MIA + Duloxetine groups. We injected duloxetine 20 mg/kg intraperitoneally in the MIA + Duloxetine group 28 days after injection, whereas rats in the MIA + Vehicle group were injected with 0.5 ml of 20% dimethyl sulfoxide. We assessed hyperalgesia, histopathological changes, immunoreactive (-ir) neurons for calcitonin gene-related peptide and activating transcription factor 3 in DRG, and immunoreactive neurons for ionized-calcium-binding adaptor molecule 1 (Iba1) in the dorsal horn of the spinal cord. MIA administration into the hip joint let to mechanical hyperalgesia of the ipsilateral hind paw (p < 0.05). A single injection of duloxetine significantly attenuated it in induced hip OA (p < 0.05) and suppressed the number of Iba1-ir microglia of the ipsilateral dorsal horn (p < 0.05). These results suggest that a single injection of duloxetine suppressed mechanical hyperalgesia and may influence the expression of Iba1 in the microglia of the ipsilateral dorsal horn in the MIA-induced hip OA. This finding implies the inhibitory effects of duloxetine against neuropathic pain, which may lead to a change of microglial activities. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 38:422-430, 2020.
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- 2019
31. Intra-articular injection of monoiodoacetate induces diverse hip osteoarthritis in rats, depending on its dose
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Satoshi Yoh, Yuya Kawarai, Shigeo Hagiwara, Sumihisa Orita, Junichi Nakamura, Shuichi Miyamoto, Takane Suzuki, Tsutomu Akazawa, Yuki Shiko, Yohei Kawasaki, and Seiji Ohtori
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Male ,Rats, Sprague-Dawley ,Disease Models, Animal ,Rheumatology ,Animals ,Humans ,Orthopedics and Sports Medicine ,Osteoarthritis, Knee ,Osteoarthritis, Hip ,Injections, Intra-Articular ,Iodoacetic Acid ,Rats - Abstract
Background Monoiodoacetate (MIA)-induced arthritis models are used widely in osteoarthritis (OA) research to develop effective conservative treatments for hip OA, as an alternative to joint replacement surgery. In joint OA models, such as the MIA-induced knee OA model, various doses of MIA are utilized, depending on the purpose of the research. So far, only 2 mg of MIA has been used for MIA-induced hip OA research. We hypothesized that the amount of MIA should be adjusted according to the osteoarthritis model under investigation. We performed radiographic and histological evaluations in rats for hip OA models induced by different doses of MIA. Methods One hundred and eighty right hips of six-week-old, male Sprague–Dawley rats (n = 30 rats per group) were treated with either a single intra-articular injection of various doses of MIA (0.25, 0.5, 1.0, 2.0, and 4.0 mg) dissolved in 25 μl of sterile saline (MIA group), or with 25 μl of sterile saline alone (Sham group). Radiographic and histological evaluations of the hip joint were performed at one, two, four, eight, and 12 weeks after administration (n = 6 rats per group per time point). Results OA changes progressed from 1 week after administration in the 1.0-mg, 2.0-mg, and 4.0-mg MIA groups. The degree of OA changes increased as the dose of MIA increased. The 0.25-mg and 0.5-mg MIA groups presented fewer OA changes than the 2.0-mg and 4.0-mg MIA groups during the entire study period (up to 12 weeks). The administration of 0.25 mg and 0.5 mg of MIA-induced both radiographic and histological OA changes in a time-dependent manner, whereas more than 2 mg of MIA provoked end-stage OA at 8 weeks after injection. Absolute, dose-dependent histopathological OA changes were observed 4 weeks after MIA administration. Conclusions Intra-articular MIA injection to the hip joints of rats induced diverse OA changes dose-dependently. Research for developing novel conservative treatments for hip OA and intractable pain should consider the pathological condition when determining the dose of MIA to be employed.
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- 2021
32. Stereotyped Upper Limb Movement in
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Tomohiro, Wakabayashi, Shinobu, Fukumura, Satoru, Takahashi, Kenji, Kurosawa, Shuichi, Miyamoto, Kosuke, Tsuchida, Shinsuke, Kato, Takeshi, Tsugawa, Yoshiyuki, Sakai, and Yukihiko, Kawasaki
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Adult ,Male ,Upper Extremity ,Young Adult ,Mental Retardation, X-Linked ,Humans ,Stereotyped Behavior - Published
- 2021
33. Changes of Dyspeptic Symptom after Successful Eradication in Helicobacter pylori-Associated Dyspepsia
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Shoko Ono, Yuichi Shimizu, Katsuhiro Mabe, Momoko Tsuda, Shuichi Miyamoto, Masayoshi Ono, Keiko Yamamoto, Takeshi Mizushima, Mototsugu Kato, Takahiko Kudo, K. Nishikawa, Kana Matsuda, Satoshi Abiko, Soichi Nakagawa, Naoya Sakamoto, Masahiro Asaka, and Manabu Nakagawa
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medicine.medical_specialty ,biology ,business.industry ,Internal medicine ,Gastroenterology ,medicine ,Mean age ,macromolecular substances ,Gastritis ,medicine.symptom ,Helicobacter pylori ,business ,biology.organism_classification - Abstract
Background: Helicobacter pylori (H. pylori) gastritis could cause dyspepsia, and eradication is recommended as the first-line treatment. Patients who continuously have their symptoms under control > 6 months after eradication are defined as having H. pylori-associated dyspepsia (HPD), whereas patients who do not benefit from successful eradication are defined as having functional dyspepsia. Objectives: We assessed changes in dyspeptic symptoms after successful eradication of H. pylori by using a questionnaire. Methods: We studied H. pylori-infected dyspeptic participants with abdominal symptom scores > 4 points on the Global Overall Symptom (GOS) scoring items and received eradication therapy. We evaluated their symptoms using the GOS questionnaire before their eradications, at 1-month and at 1-year check-ups after eradication therapy. Results: Thirty dyspeptic participants (mean age 59.6 ± 15.3 years) answered every questionnaire. Fourteen participants (46.7%) had HPD, whereas 16 participants (53.3%) were non-HPD patients. The questionnaire at 1 month showed sensitivity of 64.3% (9/14) and specificity of 56.3% (9/16) for HPD. Approximately 60% of H. pylori-infected dyspepsia participants were identified as having HPD or non-HPD within 1 month after their eradications. Conclusions: Approximately 60% of HPD participants improved at 1 month after eradication. The questionnaire at 1 month helped diagnose HPD in advance and guided next treatment choice.
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- 2019
34. Stress fracture of the midshaft clavicle associated with sternocostoclavicular hyperostosis—Case report
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Koushirou Kamiya, Sumihisa Orita, Seiji Ohtori, Hitoshi Kiuchi, Takayuki Fujiyoshi, Junichi Nakamura, Fumio Hasue, Shuichi Miyamoto, Tadashi Tanaka, and Makoto Otsuka
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SAPHO syndrome ,Orthodontics ,Hyperostosis ,Midshaft of the clavicle ,Stress fractures ,business.industry ,Callus formation ,medicine.disease ,Article ,03 medical and health sciences ,0302 clinical medicine ,medicine.anatomical_structure ,Clavicle ,030220 oncology & carcinogenesis ,medicine ,Sternocostoclavicular hyperostosis ,030211 gastroenterology & hepatology ,Surgery ,Tibia ,Osteitis ,Metatarsal bones ,business ,Stress fracture ,Ankylosing spondylitis - Abstract
Highlights • Stress fractures of the midshaft of the clavicle caused by sternocostoclavicular hyperostosis are very rare. • The differential diagnosis of sternocostoclavicular hyperostosis might be difficult. • Sternocostoclavicular hyperostosis in the patient was suspected of having either SAPHO syndrome or ankylosing spondylitis. • The patient was treated conservatively and the shoulder function was satisfactory at the final follow-up., Introduction Stress fracture is generally a result of cumulative and repetitive stress in athletes, which accelerates the normal remodeling process of bones, and the most frequently involved areas are the tibia and metatarsal bones. Therefore, stress fractures of the midshaft of the clavicle are very rare. Presentation of case A 58-year-old female was admitted to our hospital because of pain in the middle of the right clavicle. Based on laboratory and radiographic inspection, it was concluded that the stress fracture of the midshaft of the clavicle in this case was caused by sternocostoclavicular hyperostosis (SCCH). Because the clavicular fracture had no displacement or callus formation, conservative treatment with a clavicle band was undertaken. Shoulder function at the final follow-up visit was satisfactory. Discussion SCCH is a rare chronic inflammatory disorder of the axial skeleton and ossifying diathesis associated with a predominantly osteogenic response. Synovitis, acne, pustulosis, hyperostosis, and osteitis (SAPHO) syndrome and ankylosing spondylitis (AS) should be considered in the differential diagnosis of SCCH. If a patient with this type of fracture has no history of traumatic injury or sports activity, the differential diagnosis might be very difficult. Conclusion We report the case of a female who had a stress fracture of the midshaft of the clavicle associated with SCCH in SAPHO or AS. Although the patient was treated conservatively, and the shoulder function was satisfactory at the final follow-up visit, re-fracture may occur in the future.
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- 2019
35. Associated injury complicated by pediatric lower limb shaft fractures and clinical efficacy of flexible stainless-steel intramedullary nailing in children less than 15 years old
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Seiji Ohtori, Fumio Hasue, Takuma Odagiri, Takayuki Fujiyoshi, Koushirou Kamiya, Hitoshi Kiuchi, Makoto Otsuka, Junichi Nakamura, Tadashi Tanaka, Sumihisa Orita, and Shuichi Miyamoto
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medicine.medical_specialty ,Nonunion ,associated injury ,pediatric, lower limb shaft fracture, associated injury, clinical result, intramedullary nail ,Lower limb ,Article ,law.invention ,Intramedullary rod ,Cerebral contusion ,03 medical and health sciences ,0302 clinical medicine ,law ,Medicine ,Orthopedics and Sports Medicine ,030212 general & internal medicine ,lower limb shaft fracture ,intramedullary nail ,Pediatric ,Orthopedic surgery ,030222 orthopedics ,business.industry ,Femoral fracture ,medicine.disease ,clinical outcomes ,Surgery ,medicine.anatomical_structure ,Associated injury ,Nail (anatomy) ,Etiology ,business ,RD701-811 - Abstract
Although pediatric lower limb shaft fractures are common, little is known about associated injuries. The purpose of this study was to examine associated injuries complicated by pediatric lower limb shaft fractures and the efficacy of surgical treatment using a flexible stainless-steel intramedullary Ender nail in children less than 15 years old. This is a retrospective review of 29 children younger than 15 years old who were diagnosed with femoral or tibial shaft fractures and treated using Ender nails from 2005 to 2016. Baseline data, etiology, associated injuries, fracture site and patterns, operative and post-operative assessment were evaluated. The average age of the patients was 9.0 years, and mean follow-up was 18.2 months. Eleven patients (79%) had associated injury. At the final follow up, six patients (43%) sustained complications associated with the insertion area of the nail. There was no evidence of deep infection or nonunion at either fracture site. The clinical results were excellent in 10 (67%) fractures, and good in 5 (33%) fractures, based on the modified Flynn criteria. Almost all patients with a femoral fracture had an associated injury including abdominal visceral injury, cerebral contusion or other fractures. This study indicated good clinical and functional outcomes. On the other hand, the minor complications rate was high. Nevertheless, elastic stable intramedullary nailing recently has become available in Japan, and a prospective and comparative study is needed.
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- 2021
36. New method of esophageal endoscopic ultrasonography with injected gel: Endoscopic ultrasonography‐gel filling method
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Kazuhiro Takahashi, Shuichi Miyamoto, and Tomohiko R. Ohya
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medicine.medical_specialty ,Text mining ,Esophageal Neoplasms ,business.industry ,Gastroenterology ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Radiology ,Endoscopic ultrasonography ,business ,Endosonography ,Ultrasonography - Published
- 2021
37. Triple-loop clip for the traction-assisted colorectal endoscopic submucosal dissection: multidirectional triple-loop traction method
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Masayoshi Ono, Naoya Sakamoto, Tomohiko R. Ohya, and Shuichi Miyamoto
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medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Gastroenterology ,Endoscopic submucosal dissection ,MTL, multidirectional triple loop ,Traction (orthopedics) ,Traction Method ,Surgery ,medicine ,Tools and Techniques ,ESD, endoscopic submucosal dissection ,Radiology, Nuclear Medicine and imaging ,business - Published
- 2021
38. Efficiency of a novel gel product for duodenal ulcer bleeding
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Shuichi Miyamoto, Kazuharu Suzuki, and Kenji Kinoshita
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medicine.medical_specialty ,Duodenal ulcer bleeding ,business.industry ,Gastroenterology ,MEDLINE ,Text mining ,Peptic Ulcer Hemorrhage ,Recurrence ,Internal medicine ,Product (mathematics) ,Duodenal Ulcer ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,business - Published
- 2021
39. A case of Epstein-Barr virus-associated lymphoepithelioma-like carcinoma of the colon
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Ai Shimizu, Shuichi Miyamoto, Yoshihiro Matsuno, Tadakazu Shimoda, Keiko Yamamoto, Hideki Hasegawa, Kenta Takahashi, Tomoko Mitsuhashi, Hiromi Kanno-Okada, Harutaka Katano, Satoshi Abiko, and Emi Takakuwa
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0301 basic medicine ,Lymphoepithelioma-like carcinoma ,Male ,Pathology ,medicine.medical_specialty ,Epstein-Barr Virus Infections ,Herpesvirus 4, Human ,Colorectal cancer ,Colon ,Biology ,Adenocarcinoma ,medicine.disease_cause ,Malignancy ,Virus ,Pathology and Forensic Medicine ,03 medical and health sciences ,0302 clinical medicine ,hemic and lymphatic diseases ,Carcinoma ,medicine ,Humans ,Colorectal Region ,In Situ Hybridization ,Aged, 80 and over ,Receptor, EphA2 ,General Medicine ,medicine.disease ,Epstein–Barr virus ,Immunohistochemistry ,030104 developmental biology ,030220 oncology & carcinogenesis ,Tubular Adenocarcinoma ,Colonic Neoplasms ,Carcinoma, Squamous Cell ,RNA, Viral - Abstract
Lymphoepithelioma-like carcinoma is a poorly differentiated carcinoma with prominent lymphoid infiltration occurring in various organs but is exceedingly rare in the colorectal region. This malignancy is frequently associated with Epstein-Barr virus (EBV). Here we report a case of EBV-associated lymphoepithelioma-like carcinoma of the cecum in an 84-year-old male who presented with occult blood. In situ hybridization for EBV-encoded small RNAs (EBER) in an endoscopic submucosal dissection specimen showed that the tumor consisted of EBER-negative well-differentiated tubular adenocarcinoma and EBER-positive lymphoepithelioma-like carcinoma. Real-time PCR detected 7.16 copies of the EBV genome per cell in a sample microdissected from the latter component. Genotyping analysis demonstrated EBV genotype 1, and viral protein/transcript expression in the tumor showed EBV latency I. Expression of Ephrin receptor A2, a recently reported receptor for EBV, was demonstrated in the tumor cells by immunohistochemistry. To our knowledge, this is the first report of lymphoepithelioma-like carcinoma in the colorectal region showing a definite association with EBV infection.
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- 2021
40. Genomic Profiling of Small Superficial Non-Ampullary Duodenal Epithelial Tumors
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Shoko Ono, Marin Ishikawa, Ryo Mori, Yuichi Shimizu, Goki Suda, Naoya Sakamoto, Shigeki Tanishima, Takahiko Kudo, Satoshi Nimura, Tomofumi Takagi, Shuichi Miyamoto, Yoshihiro Matsuno, Yoshiya Yamamoto, and Hideyuki Hayashi
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Pathology ,medicine.medical_specialty ,Genomic profiling ,medicine ,Biology - Abstract
Introduction The mechanism underlying carcinogenesis and the genomic features of superficial non-ampullary duodenal epithelial tumors (SNADETs) have not been elucidated in detail. In this study, we examined the genomic features of incipient SNADETs, such as small lesions resected via endoscopic treatment, using next-generation sequencing (NGS). Methods Twenty consecutive patients who underwent endoscopic treatment for SNADETs of less than 20 mm between January 2017 and December 2017 were enrolled. Targeted genomic sequencing was performed through NGS using a 160 cancer-related gene panel. We examined the alteration/mutation frequencies in SNADETs. Results The maximum size of the SNADETs examined in this study was 12 mm in diameter. Five SNADETs were classified as low grade dysplasia (LGD) tumors, while 14 SNADETs were classified as high grade dysplasia tumors. Only one carcinoma-in-situ tumor was detected. We obtained NGS data for 16 samples. APC alterations were detected in 81% of samples (13/16). KRAS, BRAF, and TP53 alterations were detected in 25% (4/16), 18.8% (3/16), and 6.3% (1/16) of cases, respectively. Conclusions We detected APC alterations in most small SNADETs resected via endoscopic treatment, from LGD to carcinoma samples. Even in SNADETs classified as small LGD, KRAS and BRAF alterations were present in a few samples.
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- 2021
41. Reconstruction of the 3D coordinates of alpha-carbon atoms of proteins from a pair of stereographic figures.
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Yoriko Iwata, Atsushi Kasuya, and Shuichi Miyamoto
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- 1996
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42. Molecular Modeling to Estimate the Diffusion Coefficients of Drugs and Other Small Molecules
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Kazumi Shimono and Shuichi Miyamoto
- Subjects
Models, Molecular ,Materials science ,Molecular model ,Pharmaceutical Science ,Thermodynamics ,Article ,Analytical Chemistry ,lcsh:QD241-441 ,Small Molecule Libraries ,03 medical and health sciences ,symbols.namesake ,0302 clinical medicine ,lcsh:Organic chemistry ,Isomerism ,Molecular property ,Drug Discovery ,Molecule ,Van der Waals radius ,Physical and Theoretical Chemistry ,Diffusion (business) ,diffusion coefficient ,molecular radius ,030304 developmental biology ,Effective radius ,0303 health sciences ,Quantitative Biology::Biomolecules ,molecular modeling ,Organic Chemistry ,Radius ,Small molecule ,Quantitative Biology::Genomics ,Pharmaceutical Preparations ,Chemistry (miscellaneous) ,Stokes-Einstein equation ,symbols ,Molecular Medicine ,030217 neurology & neurosurgery - Abstract
Diffusion is a spontaneous process and one of the physicochemical phenomena responsible for molecular transport, the rate of which is governed mainly by the diffusion coefficient, however, few coefficients are available because the measurement of diffusion rates is not straightforward. The translational diffusion coefficient is related by the Stokes&ndash, Einstein equation to the approximate radius of the diffusing molecule. Therefore, the stable conformations of small molecules were first calculated by molecular modeling. A simple radius rs and an effective radius re were then proposed and estimated using the stable conformers with the van der Waals radii of atoms. The diffusion coefficients were finally calculated with the Stokes&ndash, Einstein equation. The results showed that, for the molecules with strong hydration ability, the diffusion coefficients are best given by re and for other compounds, rs provided the best coefficients, with a reasonably small deviation of ~0.3 ×, 10&minus, 6 cm2/s from the experimental data. This demonstrates the effectiveness of the theoretical estimation approach, suggesting that diffusion coefficients have potential use as an additional molecular property in drug screening.
- Published
- 2020
43. Natural history of noise and squeaking in cementless ceramic-on-ceramic total hip arthroplasty
- Author
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Junichi Nakamura, Satoshi Iida, Seiji Ohtori, Chiho Suzuki, Takushi Nakatani, Sumihisa Orita, Yoshiyuki Shinada, Yuya Kawarai, Shigeo Hagiwara, Kenta Inagaki, and Shuichi Miyamoto
- Subjects
musculoskeletal diseases ,030222 orthopedics ,business.industry ,Radiography ,Patient demographics ,Incidence (epidemiology) ,Dentistry ,Retrospective cohort study ,030229 sport sciences ,Article ,Natural history ,03 medical and health sciences ,Noise ,0302 clinical medicine ,Medicine ,Orthopedics and Sports Medicine ,business ,Body mass index ,Total hip arthroplasty - Abstract
Introduction Ceramic-on-ceramic (COC) total hip arthroplasty (THA) was developed to reduce wear debris, and consequently the occurrence of osteolysis and aseptic loosening. The purpose of the present study was to determine the incidence and natural history of noise including squeaking after COC THA, and to clarify whether clinical outcomes and any demographic and implant-related factors are associated with noise from these ceramic bearings. Methods This was a retrospective observational study of 137 primary COC THAs between 2004 and 2009 at our institute. The Mean follow-up was for 10.5 years. All patients were followed up with an office visit to obtain information regarding noise, pain, and function. The correlations between the noise, and patient demographic, radiographic, and implant-related factors were evaluated. Results Noise developed in 30 hips (21.9%), specifically squeaking in 2 (1.5%) of the 137 hips during the follow-up period. Noise including squeaking was not associated with pain or functional outcomes. There was significant correlation between noise and cup anteversion, in that cup anteversion of patients with noise was smaller than that in those without noise. No significant correlation was found between noise and any other patient demographic including age, sex, height, body weight, or body mass index. Kaplan–Meier survivorship analysis with revision for any reason and an aseptic loosening of either component as the end point, revealed a cumulative survival rate at 10 years of 98.4% and 99.1% respectively. Conclusion The long-term clinical and radiographic outcome of cementless COC THA is excellent, but we should be vigilant for noise from COC bearings.
- Published
- 2020
44. The influence of bone cement and American Society of Anesthesiologists (ASA) class on cardiovascular status during bipolar hemiarthroplasty for displaced femoral-neck fracture: A multicenter, prospective, case-control study
- Author
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Munenori Takeshita, Seiji Ohtori, Isao Abe, Satoshi Iida, Yoshitada Harada, Sumihisa Orita, Shunji Kishida, Junichi Nakamura, Tomonori Shigemura, Shuichi Miyamoto, and Makoto Otsuka
- Subjects
Male ,medicine.medical_specialty ,Systole ,Health Status ,Hemodynamics ,Blood Pressure ,Intraoperative Period ,03 medical and health sciences ,0302 clinical medicine ,030202 anesthesiology ,Humans ,Medicine ,Orthopedics and Sports Medicine ,Prospective Studies ,Prospective cohort study ,Aged ,Femoral neck ,Aged, 80 and over ,030222 orthopedics ,business.industry ,Bone Cements ,Case-control study ,Bone cement ,United States ,Femoral Neck Fractures ,Surgery ,surgical procedures, operative ,Blood pressure ,medicine.anatomical_structure ,Case-Control Studies ,Female ,Hemiarthroplasty ,business ,American society of anesthesiologists ,Cohort study - Abstract
Background Little is known about how bone cement and American Society of Anesthesiologists (ASA) classification influence the cardiovascular system in elderly patients with femoral-neck fractures treated with cemented hemiarthroplasty. Therefore, we performed a case-control study to investigate these questions and compared the following: ≥ ASA III with ≤ ASA II patients who underwent cemented hemiarthroplasty; and cemented with cementless hemiarthroplasty in ≥ ASA III patients. Hypothesis ASA classification influences the cardiovascular system during cemented hemiarthroplasty and bone cement influences intraoperative blood pressure [IBP] in patients rated ≥ ASA III. Materials and methods This multicenter, prospective study included patients with acute displaced femoral-neck fractures. Baseline data, medical history, anesthesia, FiO2, vasopressor use, femoral component, IBP, SpO2, and complications were evaluated. Of 200 patients, 100 were cemented (mean age, 77 ± 10 years), and 100 were cementless (mean age, 78 ± 9 years). Cemented hemiarthroplasty employed a third-generation technique (plugging, irrigating, drying and filling the canal with cement under pressurization). Results Systolic blood pressure (SBP) decreased significantly during cementing, versus pre-rasping in ≤ ASA II patients (from 117.9 ± 24.5 [range, 65–199] to 106.9 ± 20.3 [range, 59–172]; p = 0.007), in ≥ ASA III patients (from 129.5 ± 21.0 [range, 90–169] to 110.4 ± 17.9 [range, 79–157]; p = 0.006), and post-stem-insertion, versus pre-rasping in ≤ ASA II patients (from 117.9 ± 24.5 [range, 65–199] to 103.9 ± 20.7 [range, 53–178]; p = 0.0004), and in ≥ ASA III patients (from 129.5 ± 21.0 [range, 90–169] to 111.2 ± 24.6 [range, 70–156]; p = 0.009). In ≥ ASA III patients, SBP decreased significantly during cementing or rasping, versus pre-rasping in cemented patients (from 129.5 ± 21.0 [range, 90–169] to 110.4 ± 17.9 [range, 79–157]; p = 0.006), in cementless patients (from 115.0 ± 17.7 [range, 85–150] to 100.7 ± 15.7 [range, 75–142]; p = 0.004), and post-stem-insertion, versus pre-rasping in cemented patients (from 129.5 ± 21.0 [range, 90–169] to 111.2 ± SD [range]; p = 0.009), and in cementless patients (from 115.0 ± 17.7 [range, 85–150] to 89.4 ± 17.5 [range, 58–140]; p Conclusions This study indicate a similar hemodynamic change intraoperatively between ≤ ASA II patients and ≥ ASA III patients in the cemented group, and between patients with cemented and cementless hemiarthroplasty in the ≥ ASA III patients. With modern hemiarthroplasty techniques, bone cement might be as safe as cementless techniques in elderly, ≥ ASA III patients. Level of evidence III, multicenter case-control cohort study.
- Published
- 2018
45. Long-term outcomes and risk factors of recurrent biliary obstruction after permanent endoscopic biliary stenting for choledocholithiasis in high-risk patients
- Author
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Jun Ito, Shuhei Hayasaka, Naoya Sakamoto, Shuichi Miyamoto, Taiki Kudo, Kazuteru Hatanaka, Hirohito Naruse, Masayuki Higashino, Ryo Sugiura, Hiroaki Yamato, Kenji Kinoshita, and Yoshiya Yamamoto
- Subjects
Male ,medicine.medical_specialty ,Multivariate analysis ,Biliary Stenting ,Biliary disease ,03 medical and health sciences ,0302 clinical medicine ,Postoperative Complications ,Interquartile range ,Recurrence ,Risk Factors ,medicine ,Long term outcomes ,Humans ,Aged ,Retrospective Studies ,Aged, 80 and over ,Cholangiopancreatography, Endoscopic Retrograde ,High risk patients ,Cholestasis ,Common bile duct ,business.industry ,Incidence ,Hazard ratio ,Gastroenterology ,Middle Aged ,medicine.disease ,Surgery ,medicine.anatomical_structure ,Choledocholithiasis ,Treatment Outcome ,030220 oncology & carcinogenesis ,Feasibility Studies ,030211 gastroenterology & hepatology ,Female ,Stents ,business - Abstract
OBJECTIVE To elucidate the long-term outcomes of permanent endoscopic biliary stenting (EBS) and risk factors for recurrent biliary obstruction (RBO) in high-risk or elderly patients with common bile duct (CBD) stones. METHODS The electronic database of Hakodate Municipal Hospital was searched to identify elderly or high-risk patients with CBD stones who had undergone permanent EBS using a plastic stent without stone removal and were followed up between April 2011 and May 2019, with no further intervention until symptoms occurred. RESULTS We analyzed a total of 47 patients, of whom 19 (40.4%) were men, with a median age of 86 years (interquartile range 80-90 years). RBO and death without biliary disease occurred in 14 (29.8%) and 19 (40.4%) patients, respectively. The cumulative RBO rates at 20, 40, and 60 months were 22.1%, 31.8%, and 35.5%, respectively. The median time to RBO was 13.0 and 38.0 months in the group with CBD stone ≥15 mm and 11-14 mm in diameter, respectively. The cumulative RBO incidence rate in the group with CBD stone ≤10 mm in diameter did not reach 50%. The cumulative RBO incidence rates were significantly different among the three groups based on the CBD stone diameter (competing risk analysis, P
- Published
- 2019
46. Modified method of making a clip with ring-thread for the traction of colorectal endoscopic submucosal dissection
- Author
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Jun Ito, Shuichi Miyamoto, and Tomohiko R. Ohya
- Subjects
medicine.medical_specialty ,Endoscopic Mucosal Resection ,business.industry ,medicine.medical_treatment ,Gastroenterology ,Modified method ,Thread (computing) ,Endoscopic submucosal dissection ,Traction (orthopedics) ,Surgery ,Traction ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,business ,Colorectal Neoplasms - Published
- 2019
47. Changes in proinflammatory cytokines, neuropeptides, and microglia in an animal model of monosodium iodoacetate‐induced hip osteoarthritis
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Miyako Suzuki, Tsutomu Akazawa, Takayuki Nakajima, Seiji Ohtori, Kazuhide Inage, Sumihisa Orita, Shigeo Hagiwara, Yuya Kawarai, Takane Suzuki, Shuichi Miyamoto, and Junichi Nakamura
- Subjects
Male ,medicine.medical_specialty ,Calcitonin Gene-Related Peptide ,Neuropeptide ,Calcitonin gene-related peptide ,Osteoarthritis, Hip ,Proinflammatory cytokine ,Rats, Sprague-Dawley ,03 medical and health sciences ,GAP-43 Protein ,0302 clinical medicine ,Ganglia, Spinal ,Internal medicine ,medicine ,Animals ,Orthopedics and Sports Medicine ,030203 arthritis & rheumatology ,Microglia ,Tumor Necrosis Factor-alpha ,business.industry ,Calcium-Binding Proteins ,Microfilament Proteins ,Spinal cord ,Arthritis, Experimental ,Iodoacetic Acid ,medicine.anatomical_structure ,Endocrinology ,Calcitonin ,Neuropathic pain ,Neuralgia ,Hip Joint ,Tumor necrosis factor alpha ,business ,030217 neurology & neurosurgery - Abstract
The aim of this study was to investigate the local production of proinflammatory cytokines, pain-related sensory innervation of dorsal-root ganglia (DRG), and spinal changes in a rat model of induced hip osteoarthritis (OA). Seventy-five Sprague-Dawley rats were used, including 25 controls and 50 injected into the right hip joints (sham group, injected with 25 µl of sterile saline: N = 25; and monosodium iodoacetate (MIA) group, injected with 25 µl of sterile saline with 2 mg of MIA: N = 25). We measured the local production of TNF-α, immunoreactive (-ir) neurons for calcitonin gene-related peptide (CGRP), and growth associated protein-43 (GAP-43) in DRG, and immunoreactive neurons for ionized-calcium-binding adaptor molecule-1 (Iba-1) in the dorsal horn of spinal cord, on post-induction days 7, 14, 28, 42, and 56 (N = 5 rats/group/time point). For post-induction days 7-42, the MIA group presented significantly elevated concentrations of TNF-α than the other groups (p < 0.01), and a higher expression of CGRP-ir in FG-labeled DRG neurons than the sham group (p < 0.01). MIA rats also presented significantly more FG-labeled GAP-43-ir DRG neurons than the sham group on post-induction days 28, 42, and 56 (p < 0.05), and a significantly higher number of Iba-1-ir microglia in the ipsilateral dorsal horn than the other groups, on post-induction days 28, 42, and 56. The results suggest that in rat models, pain-related pathologies due to MIA-induced hip OA, originate from inflammation caused by cytokines, which leads to progressive, chronic neuronal damage that may cause neuropathic pain. © 2018 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 36:2978-2986, 2018.
- Published
- 2018
48. Estimating the Diffusion Coefficients of Sugars Using Diffusion Experiments in Agar-Gel and Computer Simulations
- Author
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Kenji Atsuyama, Keisuke Ekino, Takashi Shin, and Shuichi Miyamoto
- Subjects
Chemistry ,Observable ,General Chemistry ,General Medicine ,Molecular Dynamics Simulation ,010402 general chemistry ,01 natural sciences ,Agar gel ,010305 fluids & plasmas ,0104 chemical sciences ,Diffusion ,Agar ,Experimental system ,0103 physical sciences ,Drug Discovery ,Diffusion (business) ,Sugars ,Biological system ,Gels - Abstract
The isolation of useful microbes is one of the traditional approaches for the lead generation in drug discovery. As an effective technique for microbe isolation, we recently developed a multidimensional diffusion-based gradient culture system of microbes. In order to enhance the utility of the system, it is favorable to have diffusion coefficients of nutrients such as sugars in the culture medium beforehand. We have, therefore, built a simple and convenient experimental system that uses agar-gel to observe diffusion. Next, we performed computer simulations-based on random-walk concepts-of the experimental diffusion system and derived correlation formulas that relate observable diffusion data to diffusion coefficients. Finally, we applied these correlation formulas to our experimentally-determined diffusion data to estimate the diffusion coefficients of sugars. Our values for these coefficients agree reasonably well with values published in the literature. The effectiveness of our simple technique, which has elucidated the diffusion coefficients of some molecules which are rarely reported (e.g., galactose, trehalose, and glycerol) is demonstrated by the strong correspondence between the literature values and those obtained in our experiments.
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- 2018
49. Risk assessment of metachronous squamous cell carcinoma after endoscopic resection for esophageal carcinoma based on the genetic polymorphisms of alcoholdehydrogense-1B aldehyde dehydrogenase-2: temperance reduces the risk
- Author
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Marin Ishikawa, Yuichi Shimizu, Takahiko Kudo, Naoya Sakamoto, Kota Ono, Shoko Ono, Shuichi Miyamoto, Takeshi Mizushima, Momoko Tsuda, Kana Matsuda, Satoshi Abiko, and Keiko Yamamoto
- Subjects
Male ,Esophageal Neoplasms ,Temperance ,Esophageal cancer ,Kaplan-Meier Estimate ,Gastroenterology ,Hospitals, University ,0302 clinical medicine ,Japan ,Risk Factors ,Squamous cell carcinoma ,Cumulative incidence ,Aldehyde Dehydrogenase, Mitochondrial ,Smoking ,Hazard ratio ,ADH1B ,Neoplasms, Second Primary ,Middle Aged ,humanities ,medicine.anatomical_structure ,Head and Neck Neoplasms ,030220 oncology & carcinogenesis ,Carcinoma, Squamous Cell ,Female ,030211 gastroenterology & hepatology ,Esophagoscopy ,Heterozygote ,medicine.medical_specialty ,Alcohol Drinking ,Genotype ,Aldehyde dehydrogenase2 ,Risk Assessment ,03 medical and health sciences ,Internal medicine ,medicine ,Carcinoma ,Humans ,Esophagus ,Risk factor ,Saliva ,neoplasms ,Aged ,Proportional Hazards Models ,Retrospective Studies ,ALDH2 ,Polymorphism, Genetic ,business.industry ,Alcohol Dehydrogenase ,medicine.disease ,Alcohol dehydrogenase1B ,Esophagectomy ,stomatognathic diseases ,Endoscopic resection ,Multivariate Analysis ,business ,Follow-Up Studies - Abstract
Background: Metachronous multiple squamous cell carcinoma (SCC) of the esophagus and the head and neck is commonly observed in patients who have previously undergone endoscopic resection (ER) for SCC of the esophagus (ESCC). We evaluated the risk for developing metachronous SCC following ER for ESCC based on the genetic polymorphisms for alcohol dehydrogenase-1B (ADH1B) and aldehyde dehydrogenase-2 (ALDH2) as well as the alcohol consumption and smoking habits. Methods: We studied 158 patients who underwent ER for ESCC (median follow-up 80 months). Genotyping of ADH1B/ALDH2 was performed using saliva sampling. The alcohol consumption and smoking histories of the patients before and after the ER were documented. Results: Multivariate analyses revealed that inactive heterozygous ALDH2 [hazard ratio (HR) 2.25] and alcohol consumption after ER (HR 1.94) were independently associated with the risk of developing secondary SCC. Moreover, inactive heterozygous ALDH2 (HR 4.39) and alcohol consumption after the ER (HR 2.82) were independently associated with the risk of a third SCC. We analyzed 110 patients who had a history of moderate or heavy alcohol consumption before the ER. The 3-year cumulative incidence rates of secondary SCC in the temperance (n = 65) and non-temperance groups (n = 45) were 14.0 and 42.1% (p = 0.0002). Further, the 5-year cumulative incidence rates of a third SCC in the temperance and non-temperance groups were 0 and 15.6% (p = 0.0011), respectively. In addition, the 7-year cumulative incidence rates of a fourth SCC in the temperance and non-temperance groups were 0 and 15.3% (p = 0.0015), respectively. Conclusions: Continued alcohol consumption is an important risk factor for the onset of metachronous SCC and is a risk factor for the third and subsequent SCCs. Strict advice in favor of temperance is crucial.
- Published
- 2018
50. Multicenter observational study on functional bowel disorders diagnosed using Rome III diagnostic criteria in Japan
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Shinichi Katsuki, Takashi Meguro, Manabu Nakagawa, Shouko Ono, Mototsugu Kato, Soichi Nakagawa, Shuichi Muto, Naoya Sakamoto, Takeshi Mizushima, Yuichi Shimizu, Katsuhiro Mabe, Shuichi Miyamoto, Masayoshi Ono, Momoko Tsuda, and Mineo Kudo
- Subjects
Adult ,Diarrhea ,Male ,medicine.medical_specialty ,Abdominal pain ,Gastrointestinal Diseases ,Colonoscopy ,Irritable Bowel Syndrome ,03 medical and health sciences ,0302 clinical medicine ,Bloating ,Japan ,Surveys and Questionnaires ,Internal medicine ,Prevalence ,medicine ,Humans ,Prospective Studies ,Irritable bowel syndrome ,Aged ,medicine.diagnostic_test ,business.industry ,digestive, oral, and skin physiology ,Gastroenterology ,Middle Aged ,Hepatology ,medicine.disease ,Colorectal surgery ,Abdominal Pain ,030220 oncology & carcinogenesis ,Functional constipation ,Female ,030211 gastroenterology & hepatology ,Symptom Assessment ,medicine.symptom ,business ,Constipation ,Abdominal surgery - Abstract
The Rome III diagnostic criteria had been used to diagnose functional gastrointestinal disorders (FGIDs) world wide, and functional bowel disorders (FBDs) including irritable bowel syndrome (IBS) have recently attracted the attention of Japanese physicians. However, there have been few reports on the prevalence of FBDs diagnosed by the Rome III diagnostic criteria. The aim of this study was to determine the prevalence of FBDs diagnosed according to the diagnostic criteria of Rome III in Japan. All patients who were booked for colonoscopy were enrolled from eight institutions in Japan. This study was a prospective observational study in the period from April 2013 to December 2013. Patients filled out FGID questionnaires of Rome III when they were waiting for colonoscopy. Data for 1200 patients who underwent colonoscopy were analyzed. A total of 547 patients (45.6%) were diagnosed with FBDs. Out of those patients, 9.1% had IBS. According to the Rome III diagnostic criteria, 134 patients (11.2%) had functional bloating (FB), 73 (6.1%) had functional constipation (FC), 40 (3.3%) had functional diarrhea (FD), and 191 (15.9%) had unspecified functional bowel disorder (UFBD). Patients with FBDs had significantly higher rates of almost all symptoms (abdominal pain, hard or lumpy stools, loose or watery stools, and bloating) than those in the controls. In Japan, the prevalence of FBDs and IBS is high, similar to that in the US. Many patients with FBDs have multiple symptoms.
- Published
- 2018
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