1.Sociobehavioural factors associated with SARS-CoV-2 infection and COVID-19 vaccine effectiveness against medically attended, symptomatic SARS-CoV-2 infection in the Philippines: a prospective case-control study (FASCINATE-P study)
Takeshi Arashiro ; Regina Pascua Berba ; Joy Potenciano Calayo ; Marie Kris ; Reby Marie Garcia ; Shuichi Suzuki ; Cecile Dungog ; Jonathan Rivera ; Greco Mark Malijan ; Kristal An Agrupis ; Mary Jane Salazar ; Mary Ann Salazar ; Jinho Shin ; Martin Hibberd ; Koya Ariyoshi ; Chris Smith
Western Pacific Surveillance and Response 2025;16(1):49-60
Objective: We examined sociobehavioural factors associated with SARS-CoV-2 infection and estimated COVID-19 vaccine effectiveness against symptomatic SARS-CoV-2 infection in the Philippines. Such studies are limited in low- and middle-income countries, especially in Asia and the Pacific.
Methods: A case-control study was conducted in two hospitals in Manila, Philippines, from March 2022 to June 2023. Sociobehavioural factors and vaccination history were collected. PCR-positive individuals were cases, while PCR-negative individuals were controls. Adjusted odds ratios (aORs) were calculated to examine associations between sociobehavioural factors/vaccination and medically attended SARS-CoV-2 infection.
Results: The analysis included 2489 individuals (574 positive cases, 23.1%; 1915 controls, 76.9%; median age [interquartile range]: 35 [27–51] years). Although education and household income were not associated with infection, being a health-care worker was (aOR: 1.45; 95% confidence interval [CI]: 1.03–2.06). The odds of infection were higher among individuals who attended gatherings of five or more people compared to those who attended smaller gatherings (aOR: 2.58; 95% CI: 1.14–5.83). Absolute vaccine effectiveness for vaccination status was not estimated due to a high risk of bias, for example, unascertained prior infection. Moderate relative vaccine effectiveness for the first booster (32%; 95% CI: -120–79) and the second booster (48%; 95% CI: -23–78) were observed (both with wide CI), albeit with a waning trend after half a year.
Discussion: The higher odds of infection among health-care workers emphasize the importance of infection prevention and control measures. Moderate relative vaccine effectiveness with a waning trend reiterates the need for more efficacious vaccines against symptomatic infection caused by circulating variants and with longer duration of protection.
2.Experience conducting COVID-19 vaccine effectiveness studies in response to the COVID-19 pandemic in Japan and the Philippines: lessons for future epidemics and potential pandemics
Takeshi Arashiro ; Regina Pascua Berba ; Joy Potenciano Calayo ; Rontgene Solante ; Shuichi Suzuki ; Jinho Shin ; Motoi Suzuki ; Martin Hibberd ; Koya Ariyoshi ; Chris Smith
Western Pacific Surveillance and Response 2025;16(2):03-10
roblem: Once COVID-19 vaccines were rolled out, there was a need to monitor real-world vaccine effectiveness to accumulate evidence to inform policy and risk communication. This was especially true in Japan and the Philippines, given historical issues that affected vaccine confidence.
Context: Neither country had public health surveillance that could be enhanced to evaluate vaccine effectiveness or readily available national vaccination databases.
Action: Study groups were established in multiple health-care facilities in each country to assess vaccine effectiveness against both symptomatic infection and severe disease.
Outcome: In Japan, multiple study reports were published in Japanese on the website of the National Institute of Infectious Diseases and presented at the national government’s advisory board. Nationwide media coverage facilitated transparency and increased the confidence of the government and the public in the vaccination programme. In the Philippines, the launch of the study was delayed so as to align the research plan with the interests of various stakeholders and to obtain institutional review board approval. Ultimately, the studies were successfully initiated and completed.
Discussion: There were four main challenges in conducting our studies: finding health-care facilities for data collection; obtaining exposure (vaccination) data; identifying epidemiological biases and confounders; and informing policy and risk communication in a timely manner. Preparedness during inter-emergency/epidemic/pandemic periods to rapidly evaluate relevant interventions such as vaccination is critical and should include the following considerations: (1) the establishment and maintenance of prospective data collection platforms, ideally under public health surveillance (if not, clinical research networks or linked databases); (2) uniform and practical protocols considering biases and confounders; and (3) communication with stakeholders including institutional review boards.
3.Questionnaire Survey on Human Resources and Operational Conditions Associated with Drug Information (DI) Services in Medical Institutions
Takeshi UCHIKURA ; Takamasa SAKAI ; Noriko SAKAKIBARA ; Atsushi DAIKOH ; Masahiro OHBA ; Eriko SUGAYA ; Sumire SUZUKI ; Miho OHTAKE ; Susumu WAKABAYASHI
Japanese Journal of Drug Informatics 2024;26(1):8-18
Objective: The purpose of this survey is to identify the individuals responsible for providing drug information (DI) services in medical institutions across the nation and understand their work conditions. Method: This survey was conducted across medical institutions nationwide, each with at least 200 general hospital beds. The survey focused on personnel in charge of DI services at medical institutions. Results: Responses were collected from 181 facilities, representing a response rate of 13.7%. The median number of full-time equivalent DI personnel at each facility was 1.2 (ranging from 0.2 to 7 (n = 180)). Among the respondents, 90 (49.7%) individuals learned their DI responsibilities from their predecessors, 81 (44.8%) individuals learned through participation in academic societies (excluding the Japanese Society for Drug Information), and 61 (33.7%) individuals gained their knowledge from academic journals, with these methods listed in their order of prevalence. The most sought-after knowledge and skills for DI personnel included the knowledge of adverse drug reaction reporting system (134 (74.0%)), basic PC skills (130 (71.8%)), knowledge of medical fees (128 (70.7%)), and expertise in disease treatment methods (125 (69.1%)). Results and Conclusion: The findings of the survey revealed that several medical institutions with 200 or more beds have only one or two individuals in charge of DI duties. Apart from their core role in drug information, the DI staff members are expected to possess extensive knowledge concerning medical fees and related matters. However, they predominantly rely on their skills for DI operations. The tasks identified in the survey are tasks that are presently being performed by DI personnel at medical institutions. This underscores the pressing need for immediate attention to be given to acquiring the essential knowledge and education required for these tasks.
4.Letter to the Editor: Pathogens detected from patients with acute respiratory infections negative for SARS-CoV-2, Saitama, Japan, 2020
Yuzo Arima ; Yuuki Tsuchihashi ; Osamu Takahara ; Reiko Shimbashi ; Takeshi Arashiro ; Ayu Kasamatsu ; Yusuke Kobayashi ; Katsuhiro Komase ; Takuri Takahashi ; Kanako Otani ; Fangyu Yan ; Taro Kamigaki ; Kiyosu Taniguchi ; Motoi Suzuki
Western Pacific Surveillance and Response 2024;15(1):78-79
Utilizing data presented in the article by Miyashita et al., we illustrate the importance of testing data when assessing surveillance data. Accounting for the number of tests (denominator) and positivity (proportion of tests positive for a specific pathogen(s)) improves data interpretation in ways not possible from numerator case data alone.
5.The relationship between fundamental movement pattern and moderate to vigorous physical activity in a “Soccer Kids Program” for preschool children
Takeshi HIROKI ; Yusuke KUROKAWA ; Koya SUZUKI
Japanese Journal of Physical Fitness and Sports Medicine 2024;73(5):183-191
The purpose of this study was to clarify the number of types and frequencies of fundamental movement patterns (FMP) during Soccer Kids Program (SKP) recommended by the Japan Football Association for preschool children, and to clarify the relationship between FMP and Moderate to Vigorous Physical Activity (MVPA; ≥3 METs). The participants were 12 children (six boys and six girls). The SKP was conducted for 50 minutes with video recording, and researchers counted the number of FMP during SKP by replaying the video. The FMP during SKP was classified into three movement categories: stability (eight types), locomotion (eight types), and manipulation (18 types). The participants wore a triaxial accelerometer (Active Style Pro, OMRON) on their waist during SKP and measured their activity (intensity and step) every ten seconds. Partial correlation analysis was performed on the relationship between MVPA and FMP using age in months and gender as covariates. MVPA during SKP was 24.3±5.0 minutes (48.7%), which was considerably more than in previous studies. Total number of FMP during SKP was 637.8±183.5 (stability: 27.8±12.4, locomotion: 399.7±156.6, manipulation: 210.3±48.4) and the mean number of types of FMP was 14.6±2.0 types. The FMP was confirmed in all three categories. There were significant correlations between MVPA and the total FMP (r = 0.72), the number of stability (r = 0.83), and the types of FMP (r = 0.69). This study suggested that an association between MVPA and FMP (total FMP, total stability, and type of FMP) in SKP.
6.Complications of endoscopic resection in the upper gastrointestinal tract
Takeshi UOZUMI ; Seiichiro ABE ; Mai Ego MAKIGUCHI ; Satoru NONAKA ; Haruhisa SUZUKI ; Shigetaka YOSHINAGA ; Yutaka SAITO
Clinical Endoscopy 2023;56(4):409-422
Endoscopic resection (ER) is widely utilized as a minimally invasive treatment for upper gastrointestinal tumors; however, complications could occur during and after the procedure. Post-ER mucosal defect leads to delayed perforation and bleeding; therefore, endoscopic closure methods (endoscopic hand-suturing, the endoloop and endoclip closure method, and over-the-scope clip method) and tissue shielding methods (polyglycolic acid sheets and fibrin glue) are developed to prevent these complications. During duodenal ER, complete closure of the mucosal defect significantly reduces delayed bleeding and should be performed. An extensive mucosal defect that comprises three-quarters of the circumference in the esophagus, gastric antrum, or cardia is a significant risk factor for post-ER stricture. Steroid therapy is considered the first-line option for the prevention of esophageal stricture, but its efficacy for gastric stricture remains unclear. Methods for the prevention and management of ER-related complications in the esophagus, stomach, and duodenum differ according to the organ; therefore, endoscopists should be familiar with ways of preventing and managing organ-specific complications.
7.4. Alignment of the 2022 Revision of the Model Core Curriculum for Medical Education in Japan with the‘Standards of the National Medical Practitioners Qualifying Examination'
Hiroyuki KOMATSU ; Masanaga YAMAWAKI ; Masatomi IKUSAKA ; Masato ETO ; Yasuhiko KONISHI ; Keiichiro SUZUKI ; Shoichi SHIMADA ; Osamu NOMURA ; Yasushi MATSUYAMA ; Harumi GOMI ; Akira YAMAMOTO ; Takeshi ONOUE ; Hitoshi HASEGAWA ; Hideki TAKAMI ; Hitoaki OKAZAKI
Medical Education 2023;54(2):157-163
In this revision, we have attempted to align the Model Core Curriculum for Medical Education competency, "problem-solving ability based on specialized knowledge," with the "Standards of National Examination for Medical Practitioners." The major diseases and syndromes in "Essential Fundamentals" correspond to the basic diseases in Table 1 of the Core Curriculum, symptoms, physical and laboratory examinations, and treatment in "General Medicine" correspond to the items in Table 2 of the Core Curriculum, and the diseases in "Medical Theory" correspond to the diseases in PS-02 of the Core Curriculum. The validity of the diseases in the Core Curriculum was verified using the evaluation results of the examination level classification of the "Research for Revision of National Examination Criteria." Approximately 690 diseases were conclusively selected. This revision mentions the number of diseases in the Core Curriculum for the first time. Hopefully, this will lead to a deeper examination of diseases that should be studied in medical schools in the future.
8.Ameloblastic carcinoma of the mandible:a case report
Satoru OGANE ; Arisa FUJII ; Taiki SUZUKI ; Kazuhiko HASHIMOTO ; Sadamitsu HASHIMOTO ; Masayuki TAKANO ; Akira KATAKURA ; Takeshi NOMURA
Maxillofacial Plastic and Reconstructive Surgery 2023;45(1):17-
Background:
Ameloblastic carcinoma is a malignant form of ameloblastoma and a very rare odontogenic tumor. We report a case of ameloblastic carcinoma that occurred after removal of a right-sided mandibular dental implant.Case presentation A 72-year-old female patient visited her family dentist with a complaint of pain around a lower right implant placed 37 years previously. Although the dental implant was removed with the diagnosis of periimplantitis, the patient experienced dullness of sensation in the lower lip and was followed up by her dentist, but after no improvement. She was referred to a highly specialized institution where she was diagnosed with osteomyelitis and treated the patient with medication; however, there was no improvement. In addition, granulation was observed in the same area leading to a suspicion of malignancy, and the patient was referred to our oral cancer center. The diagnosis of squamous cell carcinoma was made after a biopsy at our hospital. Under general anesthesia, the patient underwent mandibulectomy, right-sided neck dissection, free flap reconstruction with an anterolateral thigh flap, immediate reconstruction with a metal plate, and tracheostomy. Histological analysis of the resected specimen on hematoxylin and eosin staining showed structures reminiscent of enamel pulp and squamous epithelium in the center of the tumor. The tumor cells were highly atypical, with nuclear staining, hypertrophy, irregular nuclear size, and irregular nuclear shape, all of which were suggestive of cancer. Immunohistochemical analysis showed that Ki-67 was expressed in more than 80% of the targeted area, and the final diagnosis was primary ameloblastic carcinoma.
Conclusion
After reconstructive flap transplantation, occlusion was re-established using a maxillofacial prosthesis.The patient remained disease-free at the 1-year 3-month follow-up.
9.Antitumor and Complementary Effects of Original Konjac Jelly Mixed with Soymilk, Cheese and Vitamin C for Cisplatin-resistant Bladder Cancer
Hidekazu KOIKE ; Takeshi MIYAO ; Azusa KANAYAMA ; Kazuhiro SUZUKI
Japanese Journal of Complementary and Alternative Medicine 2022;19(1):15-21
In this study, we aimed to develop foods with antitumor and complementary effects against cisplatin (CDDP)-resistant bladder cancer. UMUC3, a human bladder cancer cell line was exposed to CDDP and cultured over a prolonged period to prepare UMUC3-CR, a CDDP-resistant subline. Androgen receptor mRNA expression was high in the UMUC3-CR subline. Genistein and vitamin C suppressed UMUC3-CR tumor growth. Additionally, the liberal intake of cheese in parental cell UMUC3-transplanted mice was associated with prolonged survival. Therefore, we created konjac jelly (KIK300) containing soy milk, cheese, and vitamin C as the main ingredients. Liberal administration of KIK300 to UMUC3-CR-transplanted mice suppressed tumor growth and reduced vascular endothelial growth factor mRNA expression. Furthermore, we observed no weight loss in the animals, their skin condition improved, and exercise capacity was improved. In conclusion, this study suggests that KIK300 may show antitumor and complementary effects on CDDP-resistant bladder cancer.
10.Improvements in Intractable Lumbar and LowerExtremity Symptoms after Systemic Administration of Tocilizumab, an Anti-interleukin-6 Receptor Antibody
Takeshi SAINOH ; Takeshi SAINOH ; Sumihisa ORITA ; Sumihisa ORITA ; Masayuki MIYAGI ; Masayuki MIYAGI ; Miyako SUZUKI-NARITA ; Miyako SUZUKI-NARITA ; Yoshihiro SAKUMA ; Yoshihiro SAKUMA ; Yasuhiro OIKAWA ; Yasuhiro OIKAWA ; Go KUBOTA ; Go KUBOTA ; Jun SATO ; Jun SATO ; Yasuhiro SHIGA ; Yasuhiro SHIGA ; Kazuki FUJIMOTO ; Kazuki FUJIMOTO ; Yawara EGUCHI ; Yawara EGUCHI ; Masao KODA ; Masao KODA ; Yasuchika AOKI ; Yasuchika AOKI ; Tsutomu AKAZAWA ; Tsutomu AKAZAWA ; Takeo FURUYA ; Takeo FURUYA ; Junichi NAKAMURA ; Junichi NAKAMURA ; Hiroshi TAKAHASHI ; Hiroshi TAKAHASHI ; Satoshi MAKI ; Satoshi MAKI ; Masahiro INOUE ; Masahiro INOUE ; Hideyuki KINOSHITA ; Hideyuki KINOSHITA ; Masaki NORIMOTO ; Masaki NORIMOTO ; Takashi SATO ; Takashi SATO ; Masashi SATO ; Masashi SATO ; Masahiro SUZUKI ; Masahiro SUZUKI ; Keigo ENOMOTO ; Keigo ENOMOTO ; Hiromitsu TAKAOKA ; Hiromitsu TAKAOKA ; Norichika MIZUKI ; Norichika MIZUKI ; Takashi HOZUMI ; Takashi HOZUMI ; Ryuto TSUCHIYA ; Ryuto TSUCHIYA ; Geundong KIM ; Geundong KIM ; Takuma OTAGIRI ; Takuma OTAGIRI ; Tomohito MUKAIHATA ; Tomohito MUKAIHATA ; Takahisa HISHIYA ; Takahisa HISHIYA ; Seiji OHTORI ; Seiji OHTORI ; Kazuhide INAGE ; Kazuhide INAGE
Asian Spine Journal 2022;16(1):99-106
Methods:
This prospective, single-arm study included 11 patients (eight men; mean age, 62.7 years) with ≥3-months’ chronic pain history due to lumbar disease. Subcutaneous TCZ injections were administered twice, at a 2-week interval. We evaluated low back pain, leg pain, and leg numbness using numeric rating scales and the Oswestry Disability Index (ODI; baseline and 6 months postinjection); serum IL-6 and tumor necrosis factor-α levels (baseline and 1 month postinjection); and clinical adverse events.
Results:
Intractable symptoms reduced after TCZ administration. Low back pain improved for 6 months. Improvements in leg pain and numbness peaked at 4 and 1 month, respectively. Improvements in ODI were significant at 1 month and peaked at 4 months. Serum IL-6 was increased at 1 month. IL-6 responders (i.e., patients with IL-6 increases >10 pg/mL) showed particularly significant improvements in leg pain at 2 weeks, 1 month, and 2 months compared with nonresponders. We observed no apparent adverse events.
Conclusions
Systemic TCZ administration improved symptoms effectively for 6 months, with peak improvements at 1–4 months and no adverse events. Changing serum IL-6 levels correlated with leg pain improvements; further studies are warranted to elucidate the mechanistic connections between lumbar disorders and inflammatory cytokines.


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