2.Patient-specific mechanical analysis of pedicle screw insertion in simulated osteoporotic spinal bone models derived from medical images
Norihiro NISHIDA ; Hidenori SUZUKI ; Hanvey TETSU ; Yuki MORISHITA ; Yogesh KUMARAN ; Fei JIANG ; Masahiro FUNABA ; Kazuhiro FUJIMOTO ; Yusuke ICHIHARA ; Takashi SAKAI ; Junji OHGI
Asian Spine Journal 2024;18(5):621-629
Methods:
Male and female patients with computed tomography data were selected. Dimensions of the first thoracic (T1), fourth lumbar (L4), and fifth lumbar (L5) vertebrae were measured, and bone models consisting of the cancellous and cortical bones made from polyurethane foam were created. PS with diameters of 4.5 mm, 5.5 mm, and 6.5 mm were used. T1 PS were 25 mm long, and L4 and L5 PS were 40 mm long. The bone models were secured with cement, and the MIT was measured using a calibrated torque wrench. After MIT testing, the PS head was attached to the machine’s crosshead. POS was then calculated at a crosshead speed of 5 mm/min until failure.
Results:
The L4 and L5 were notably larger in female bone models, whereas the T1 vertebra was larger in male bone models. Consequently, the MIT and POS for L4 and L5 were higher in female bone models across all PS diameters than in male bone models. Conversely, the MIT for T1 was higher in male bone models across all PS; however, no significant differences were observed in the POS values for T1 between sexes.
Conclusions
The mechanical properties of the proposed bone models can vary based on the vertebral structure and size. For accurate 3D surgical and mechanical simulations in the creation of custom-made medical devices, bone models must be constructed from patientspecific medical images.
3.Proof-of-concept study of the caninized anti-canine programmed death 1antibody in dogs with advanced non-oral malignant melanoma solid tumors
Masaya IGASE ; Sakuya INANAGA ; Shoma NISHIBORI ; Kazuhito ITAMOTO ; Hiroshi SUNAHARA ; Yuki NEMOTO ; Kenji TANI ; Hiro HORIKIRIZONO ; Munekazu NAKAICHI ; Kenji BABA ; Satoshi KAMBAYASHI ; Masaru OKUDA ; Yusuke SAKAI ; Masashi SAKURAI ; Masahiro KATO ; Toshihiro TSUKUI ; Takuya MIZUNO
Journal of Veterinary Science 2024;25(1):e15-
Background:
The anti-programmed death 1 (PD-1) antibody has led to durable clinical responses in a wide variety of human tumors. We have previously developed the caninized anti-canine PD-1 antibody (ca-4F12-E6) and evaluated its therapeutic properties in dogs with advance-staged oral malignant melanoma (OMM), however, their therapeutic effects on other types of canine tumors remain unclear.
Objective:
The present clinical study was carried out to evaluate the safety profile and clinical efficacy of ca-4F12-E6 in dogs with advanced solid tumors except for OMM.
Methods:
Thirty-eight dogs with non-OMM solid tumors were enrolled prospectively and treated with ca-4F12-E6 at 3 mg/kg every 2 weeks of each 10-week treatment cycle. Adverse events (AEs) and treatment efficacy were graded based on the criteria established by the Veterinary Cooperative Oncology Group.
Results:
One dog was withdrawn, and thirty-seven dogs were evaluated for the safety and efficacy of ca-4F12-E6. Treatment-related AEs of any grade occurred in 13 out of 37 cases (35.1%).Two dogs with sterile nodular panniculitis and one with myasthenia gravis and hypothyroidism were suspected of immune-related AEs. In 30 out of 37 dogs that had target tumor lesions, the overall response and clinical benefit rates were 6.9% and 27.6%, respectively. The median progression-free survival and overall survival time were 70 days and 215 days, respectively.
Conclusions
The present study demonstrated that ca-4F12-E6 was well-tolerated in nonOMM dogs, with a small number of cases showing objective responses. This provides evidence supporting large-scale clinical trials of anti-PD-1 antibody therapy in dogs.
4.6. Postgraduate Training and CME : Nijiiro Doctors Initiative
Eriko YOSHIDA ; Yusuke KANAKUBO ; Nozomi KUBOTA ; Yuki SAKAI ; Hiromitsu YAMASHITA
Medical Education 2023;54(1):35-40
Nijiiro Doctors offered a six-month LGBTQ healthcare training course for physicians in their third year of post-graduate studies or above, with the goal of implementing practice at their institutions. In addition to lectures, the course included dialogues with LGBTQ individuals, role-plays in which the LGBTQ individuals played the role of mock patients and reviews in small groups in each session.
5.Effect of acupuncture sensation on body sway during one legged stance
Yusuke MURAKOSHI ; Hideki FUJIMOTO ; Yuto MATSUURA ; Oyunchimeg CHULUUNBAT ; Hiroshi TANIGUCHI ; Fumiko YASUNO ; Yoshihisa KOGA ; Tomomi SAKAI
Journal of the Japan Society of Acupuncture and Moxibustion 2023;73(3):176-185
[Objectives]The purpose of this study is to clarify the effect of acupuncture sensation on the body sway during a one-legged stance.[Methods] The study participants were 16 healthy adults (mean age 21.8±1.6 years). The study design was a crossover method, wherein the same individuals participated in the acupuncture stimulation condition and the control condition at intervals of more than one week. Evaluation was performed before and after each intervention by holding a one-legged stance for 40 seconds on a force plate. A total of six items of body sway were measured, including: circumferential area, rectangular area, effective value area, total trajectory length, unit trajectory length, and unit area trajectory length. In addition, Visual analog scale (VAS) was used to evaluate the ease with which the lower leg was subjected to force during measurement. In the acupuncture stimulation condition, single acupuncture was performed on the lower limb muscle group of the measuring leg, and the VAS of the acupuncture sensation was evaluated at the time of stimulation and at the end of measurement. Stainless steel disposable acupuncture needles (length: 50 mm, diameter: 0.20 mm.) were used for stimulation. The stimulation sites were the ST32, ST37, BL37, BL57, and GB37 of the test leg, and acupuncture needles were inserted to the desired depth and removed when sensation was felt. The control condition was the supine position for five minutes. Comparisons were made between the pre- and post-acupuncture stimulation conditions and the pre- and post-control conditions(body sway, lower leg VAS, acupuncture sensation VAS). [Results] There was no significant difference between the two conditions in terms of body sway. However, the VAS of lower limb effort was significantly lower, from 78.0±14.9 mm to 63.1±17.0 mm before and after the intervention (p<0.05). On the other hand, in the control condition, there was no significant difference from 79.5±12.3 mm to 75.2±12.7 mm before and after rest. The VAS of acupuncture sensation was 50.4±14.3 mm during stimulation and 9.8±9.0 mm at the end of measurement, which was significantly lower (p<0.05). [Conclusion] Acupuncture sensation did not affect the body sway before and after acupuncture stimulation. However, the subjective sensation of weakness appeared, suggesting that acupuncture stimulation may cause a transient sensation of weakness.
6.Survey research on the perceptions and issues of ordinary women regarding cosmetic acupuncture
Yoko SONEHARA ; Hiroshi TANIGUCHI ; Hideki FUJIMOTO ; Yuto MATSUURA ; Yusuke MURAKOSHI ; Fumiko YASUNO ; Tomomi SAKAI
Journal of the Japan Society of Acupuncture and Moxibustion 2022;72(3):190-202
[Objective] This study aimed to investigate the awareness and perceptions of cosmetic acupuncture among ordinary women.[Method] A questionnaire method was adopted, with a target population of 1,000 ordinary women living in Shizuoka prefecture, which is considered a suitable location for test marketing in Japan.Questionnaires were distributed through the Chambers of Commerce in the prefecture by age group, according to the population ratio, and responses were obtained. The items included (1) basic information; (2) presence and type of facial cosmetic concerns; (3) experience of acupuncture, awareness of cosmetic acupuncture, the medium through which they learned of it, perception of effects, and experience of cosmetic acupuncture; (4) effects and types of cosmetic acupuncture, presence or absence of adverse effects, current treatment status, desired treatment outcomes and reasons for seeking treatment, wishes from treatment clinics, and wishes from practitioners; and (5) 1 month's investment in beauty.[Result] The response rate was 56.2%, and 91.8% of the participants perceived that they had facial cosmetic concerns; 28.8% had experience with acupuncture, whereas 42.0% had knowledge regarding cosmetic acupuncture. Television (45.3%) was the primary source of information regarding this. The most prevalent perception of the effects of cosmetic acupuncture was lifting (44.8%), and 43.2% of the 521 participants inexperienced with cosmetic acupuncture consented to treatment. Participants mostly reported being somewhat interested in the procedure as their reason for wanting to receive treatment (45.3%). The most common reason for opting out of treatment was due to pain (52.6%). Of those who experienced cosmetic acupuncture, 60.0% said they experienced positive effects, and lifting (62.5%) is the most frequently perceived outcome, which matched the commonly held perception. However, among the participants, 45.0% reported negative effects, while 47.5% received the treatment two or more times in the past but did not continue. Participants mainly wanted clean treatment centers and skilled practitioners. The most common monthly investment in beauty was between 3,000 yen and 5,000 yen (28.5%).[Discussion/Conclusion] The results suggest that many women have cosmetic concerns regarding their faces and expect lifting from cosmetic acupuncture. The low treatment rate among women and their reasons for not seeking re-treatment were elucidated in this study, despite their degree of awareness. Further, the problems associated with the development of cosmetic acupuncture were clarified.
7.Active Tuberculosis With Rapidly-Growing Pulmonary Lesion in a Hospitalized Dermatomyositis Patient Below Age 40
Kohei FUJITA ; Makoto NAKAO ; Ayano WATANABE ; Mamoru SUGIHARA ; Sosuke ARAKAWA ; Yusuke SAKAI ; Yuto SUZUKI ; Hidefumi SATO ; Kaneshige SASAKI ; Hideki MURAMATSU
Journal of the Japanese Association of Rural Medicine 2020;69(2):165-170
A 38-year-old man was admitted to our hospital with fever and skin rash, and he was diagnosed as having dermatomyositis. He was treated with anti-inflammatory steroid and immunosuppressive agents. On hospital day 48, chest computed tomography (CT) revealed a nodule measuring approximately 2 cm in size in the lower lobe of the right lung (S9). Bacterial and/or fungal infection was suspected, but there was no response to antibiotic or antifungal treatment. A week later, repeat chest CT revealed the tumor now measuring approximately 6 cm in size in the lower lobe of the right lung. We performed bronchoscopy, and bacteriological examination of the transbronchial biopsy specimen revealed pulmonary tuberculosis. Interferongamma release assay (IGRA) before the initiation of immunosuppressive treatment was negative, so we did not administer treatment for latent tuberculosis infection. He was, however, treated with isoniazid, rifampicin, ethambutol, and pyrazinamide for 9 months, following which radiological features improved gradually. Here we describe in detail this rare case of a negative IGRA result before immunosuppressive therapy in a relatively young Japanese man who went on to develop active tuberculosis with a rapidly-growing pulmonary lesion during hospitalization.
8.Fabrication of Functional Cell Sheets with Human Thyrocytes from Non-Tumorous Thyroid Tissue
Yu HUANG ; Kosho YAMANOUCHI ; Yusuke SAKAI ; Sayaka KUBA ; Chika SAKIMURA ; Michi MORITA ; Kengo KANETAKA ; Mitsuhisa TAKATSUKI ; Susumu EGUCHI
Tissue Engineering and Regenerative Medicine 2019;16(5):491-499
BACKGROUND: Engineered cell sheet transplantation has been considered an alternative physiological therapy for endocrine disorders. In this study, we attempted to fabricate functional human thyroid cell sheets using the engineering technology by culturing primary thyrocytes in free-feeder monolayers and assessed their proliferation and function in two different media. METHODS: The non-tumorous tissues (approximately 2 g) were dissected during surgery. Primary human thyroid cells were isolated by mechanical dispersion and treatment with isolation solution. The cells were cultured on tissue culture dishes or temperature-responsive culture dishes to induce the formation of detached cell sheets. RESULTS: Primary thyroid cells isolated from nine patients were positive for thyroid transcription factor 1, thyroglobulin (TG) and cytokeratin 7. Cell sheets with follicles were fabricated by cells incubated in both Dulbecco's Modified Eagle Medium (DMEM) and hepatocyte-defined medium (HDM) culture medium. The diameter and thickness of sheets fabricated in HDM were larger and thicker than those fabricated from DMEM. Furthermore, the cells incubated in HDM secreted higher levels of fT3 and fT4 than those incubated in DMEM. The thyroid peroxidase and TG mRNA of cells maintained in HDM were higher than those in cells maintained in DMEM. CONCLUSION: HDM appears suitable as a culture medium for maintaining primary thyrocytes and fabricating functional cell sheets. These in vitro findings may contribute to the development of appropriate culture conditions for human thyrocytes as well as engineered functional cell sheets.
Eagles
;
Humans
;
In Vitro Techniques
;
Iodide Peroxidase
;
Keratin-7
;
RNA, Messenger
;
Thyroglobulin
;
Thyroid Gland
;
Transcription Factors
9.A Case of Amylase-producing Small Cell Lung Cancer Complicated by Cushing's Syndrome
Ayana ISHIGURO ; Makoto NAKAO ; Yoshiharu OZAWA ; Yuto SUZUKI ; Yusuke SAKAI ; Sosuke ARAKAWA ; Kohei FUJITA ; Hidefumi SATO ; Etsuko YAMAMORI ; Hideki MURAMATSU
Journal of the Japanese Association of Rural Medicine 2019;68(4):535-542
A 68-year-old man was admitted to our hospital with complaints of fatigue, polyuria, and loss of appetite, and was diagnosed with diabetic ketosis. Chest and abdominal computed tomography (CT) showed a pulmonary tumor on the right S3 and multiple liver tumors. Blood chemistry revealed elevated levels of amylase and hepatobiliary enzymes. Pathological examination of a biopsy specimen from the liver tumor showed a small cell carcinoma. Based on the imaging and pathological findings, we made a diagnosis of extensive disease small-cell lung cancer (ED-SCLC), cT1aN3M1b (HEP, ADR). Treatment with carboplatin and etoposide evoked partial response and the serum level of amylase decreased. Immunohistochemical staining of liver biopsy specimen was positive for amylase, leading to a diagnosis of SCLC with amylase production. About 22 months after the diagnosis of SCLC, he was admitted to our hospital with fatigue, muscular weakness, edema, and hyperpigmentation. Laboratory findings showed elevated serum levels of hepatobiliary enzymes, adrenocorticotropic hormone (ACTH), and cortisol, and a decreased serum potassium level. Urinary potassium level was elevated. Pituitary magnetic resonance imaging showed a normal morphology. We made a diagnosis of SCLC complicated by Cushing’s syndrome. We report this rare case of SCLC with amylase and ACTH production, which was detected in the course of treatment of SCLC.
10.Clinical Investigation of Patients with Lung Adenocarcinoma Harboring the EGFR T790M Mutation Diagnosed by Pleural or Pericardial Fluid Cell Block Methods
Yuto SUZUKI ; Makoto NAKAO ; Hideki MURAMATSU ; Sosuke ARAKAWA ; Yusuke SAKAI ; Kouhei FUJITA ; Jun NARITA ; Shinya HATTORI ; Hidefumi SATO
Journal of the Japanese Association of Rural Medicine 2018;67(4):485-
In patients with epidermal growth factor receptor (EGFR) mutation-positive lung cancer (LC) who have acquired resistance to first and/or second-generation EGFR-tyrosine kinase inhibitors (EGFR-TKIs), detection of EGFR T790M (T790M) mutation is essential before administration of osimertinib. Tissue sample is the main specimen used to detect the T790M mutation, and so cell block preparation using pleural or pericardial fluid should be considered. The utility of body cavity effusion cell block methods in T790M mutation detection have not yet been fully evaluated. This study aimed to evaluate the clinical background and treatment course of LC patients harboring the T790M mutation by using body cavity effusion cell block methods at our hospital. All patients were treated with first and/or second-generation EGFR-TKIs and had developed malignant pleural or pericardial fluid as a result of progressive disease. T790M mutation status was evaluated using body cavity effusion cell block method in 9 patients, from April 2016 to August 2017. We retrospectively evaluated the clinical characteristics and treatment course of these 9 patients (3 males and 6 females; median age 76 years). At the first diagnosis of LC, 7 patients had stage IV cancer; 4 patients were diagnosed by bronchial fibroscopy and 3 were diagnosed from pleural fluid examination. Regarding EGFR mutation, 3 and 6 patients carried the exon 19 deletion and L858R mutation, respectively. Median time interval between the first diagnosis of LC and T790M mutation evaluation was 30.8 months; 7 patients were diagnosed with positive T790M mutation by using body cavity effusion cell block methods. The T790M mutation was highly detected by examination of body cavity effusion cell blocks. Further evaluation is necessary with respect to variations in T790M detection rate based on the specimen collection site and/or progressive disease pattern in different patients.


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