1.Impact of car seat recline angle on global spinal alignment and seat belt positioning: a prospective observational study in Japan
Norihiro NISHIDA ; Tomohiro IZUMIYAMA ; Ryusuke ASAHI ; Hidenori SUZUKI ; Masahiro KOIKE ; Masahiro FUNABA ; Kazuhiro FUJIMOTO ; Yusuke ICHIHARA ; Yogesh KUMARAN ; Hiroshi HAMANO ; Shigeru SUGIMOTO ; Takashi SAKAI
Asian Spine Journal 2026;20(2):283-293
Methods:
Lateral radiographs were obtained from 100 healthy adults in standing and seated postures at 25°, 35°, and 45° recline angles. Spinal parameters (cervical lordosis, thoracic kyphosis, thoracolumbar kyphosis, lumbar lordosis, sacral slope, pelvic tilt, and T1 spinopelvic inclination) and seat belt metrics (X-value, Z-value, and lap belt angle) were measured. Multivariate regression was used to assess associations with sex, age, height, and body mass index (BMI).
Results:
Reclining reduced cervical/lumbar lordosis and sacral slope, while thoracic kyphosis and pelvic tilt increased. Higher BMI was associated with a cranially shifted and more horizontal lap belt. Taller individuals showed greater T1 spinopelvic inclination and pelvic parameters. Females exhibited more pronounced thoracic kyphosis and pelvic retroversion across reclining angles.
Conclusions
Car seat recline significantly alters spinal alignment and seat belt positioning, with changes influenced by age, height, and BMI. These findings support ergonomic improvements in seat design and may inform surgical planning for ASD.
2.High-Fat Diet-Fed Kcnq1 Mutant Mice Have Reduced Pancreatic β-Cell Mass via Gene-Environment Interaction
Shun-ichiro ASAHARA ; Hiroyuki INOUE ; Yuka IHARA ; Kyoko TERUYAMA ; Asuka IMAI ; Chisako HARA ; Mizuki HARA ; Masako SEIKE ; Aisha YOKOI ; Nozomi KIDO ; Hirotaka SUZUKI ; Ayumi KANNO ; Yuka INABA ; Hitoshi WATANABE ; Go SHIOI ; Maki KIMURA-KOYANAGI ; Michihiro MATSUMOTO ; Hiroshi INOUE ; Keiichi I. NAKAYAMA ; Wataru OGAWA ; Masato KASUGA ; Yoshiaki KIDO
Diabetes & Metabolism Journal 2026;50(1):77-89
Background:
The potassium voltage-gated channel subfamily Q member 1 (KCNQ1) gene has recently received much attention as a candidate susceptibility gene for type 2 diabetes mellitus, especially in Asian populations. We previously reported that Kcnq1 mutant mice exhibit reduced insulin secretion and hyperglycemia due to a decrease in pancreatic β-cell mass. Through in vivo and in vitro analyses, we ascertained that this mechanism is the result of the downregulation of the non-coding RNA ‘Kcnq1ot1,’ which is expressed in the paternal allele of the Kcnq1 gene region, causing an increase in the expression of the cell cycle inhibitor cyclin dependent kinase inhibitor 1C (Cdkn1c). It was found that decreased Kcnq1ot1 expression resulted in pancreatic β-cell failure; however, the degree of pancreatic β-cell volume reduction was not severe.
Methods:
We induced obesity in Kcnq1ot1 truncation mice by feeding them a high-fat diet and evaluated pancreatic β-cell mass.
Results:
In the present study, we reveal that CCAAT/enhancer binding protein beta (C/EBPβ), which is expressed at higher levels in pancreatic β-cells in obese individuals, further increases the expression of Cdkn1c, which is upregulated by the Kcnq1 gene mutation. We found that simultaneous Cdkn1c hypomethylation and C/EBPβ overexpression in pancreatic β-cells causes a synergistic decrease in pancreatic β-cell mass.
Conclusion
This finding suggests that the synergistic effect of genetic factors such as Kcnq1 gene mutations and environmental factors such as obesity and overeating, which lead to increased expression of C/EBPβ, contribute to the regulation of pancreatic β-cell mass. This study is the first to show that the Kcnq1 gene is related to pancreatic β-cell mass through genetic-environment interactions.
3.Associations of serum carotene levels and decline for the ability of attention: a longitudinal study in the Japanese general population.
Hiroshi OKUMIYAMA ; Yoshiki TSUBOI ; Ryosuke FUJII ; Akihiko IWAHARA ; Takeshi HATTA ; Shuntaro SATO ; Hiroya YAMADA ; Koji SUZUKI
Environmental Health and Preventive Medicine 2025;30():58-58
BACKGROUND:
Although serum carotene may contribute to dementia prevention, there is a lack of longitudinal evidence for early cognitive decline before dementia symptoms. The aim of this study was to examine whether serum carotene levels were associated with annually evaluated cognitive trajectories among the Japanese general population.
METHODS:
Among 581 baseline participants, 199 individuals (83 males; mean age [min, max], 62.7 [39, 90] years) who underwent cognitive assessments more than twice after baseline were analyzed. "Attention" levels were assessed using one- and three-target Digit Cancellation Tests (D-CAT1 and D-CAT3). "General cognitive ability" was assessed by the short version of Mini-Mental State Examination (SMMSE). Serum carotenes (α-carotene, β-carotene and lycopene) were measured by high-performance liquid chromatography. After the measurements, we calculated total carotene levels by summing up the levels of all measured carotene. Carotene levels were categorized into three groups for analysis (low: 0%-25%, middle: 25%-75%, and high: 75%-100%). A linear mixed model was used to estimate the slope of the D-CAT score trajectory and to compare it between three categories.
RESULTS:
Compared with the middle carotene group, decline of attention was faster in the D-CAT1 for low β-carotene (β = -3.48, p = 0.035), lycopene (β = -3.10, p = 0.062), and total carotene (β = -4.75, p = 0.003), but not for α-carotene (β = -2.60, p = 0.111). For the D-CAT3, decline of attention was faster in the group of low lycopene (β = -3.17, p = 0.002) and total carotene (β = -2.17, p = 0.037) compared with the middle carotene group, while no clear association for α-carotene (β = -0.67, p = 0.521) and β-carotene (β = -0.64, p = 0.639). There were no clear associations between serum carotene and the SMMSE score.
CONCLUSIONS
These findings suggest low levels of serum lycopene are associated with a decline of attention in the setting of the general population.
Humans
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Male
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Carotenoids/blood*
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Female
;
Longitudinal Studies
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Middle Aged
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Japan
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Aged
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Adult
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Aged, 80 and over
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Attention
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Lycopene
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East Asian People
4.Online Interaction Meetings between Outatients with Cancer and Community Pharmacists
Asako NISHIMURA ; Fumiko INOUE ; Ayumi OKIZAKI ; Shota SUZUKI ; Hiroshi OKADA ; Nobuhito SHIBATA
An Official Journal of the Japan Primary Care Association 2025;48(1):22-25
The growing prevalence of outpatient chemotherapy highlights the vital role that community pharmacists have in patient care. An online interaction meeting was held annually over a three-year period that aimed to foster mutual understanding between patients with cancer and community pharmacists. Each session involved six pharmacists and seven to eight cancer patients, with the same pharmacists participating each year. These meetings highlighted the potential of community pharmacists to reduce patient anxiety and provide treatment guidance, underscoring the importance of connecting patients with pharmacists.
5.Pharmaceutical Students' Experiences in Frailty Prevention Activities within Local Communities
Kazuma NISHINO ; Hiroshi OKADA ; Shota SUZUKI ; Chiho KANEKO ; Yosuke NOMURA
An Official Journal of the Japan Primary Care Association 2025;48(3):112-115
We organized salon activities in Kudoyama-cho, Wakayama Prefecture, that engaged pharmacy students in community health support activities. The project aimed to explore current health support initiatives and the potential contributions of the students to local communities. During the activities, the students engaged with participants through exercises, dances, and games. We found that students' participation enhanced interactions in the salon through their creative approaches. A system enabling pharmaceutical students to be continuously involved in the salon should be established through collaborations between universities and local governments.
6.A Case of Duodenitis Suspected to Be Associated With Legionella Infection
Ryota SAITO ; Satoshi SUZUKI ; Hiroshi KUMAGAI ; Fukuo KOMABA ; Kengo KISA
Journal of the Japanese Association of Rural Medicine 2024;73(2):110-115
In infectious enteritis, the affected site differs depending on the organism causing the disease, and based on this feature, it is possible to estimate the causative organisms of infectious enteritis. However, there have been few reports of infectious enteritis mainly affecting the duodenum. This report describes a case of duodenal enteritis that was suspected to be associated with Legionella infection. The patient was a 66-year-old man. He was febrile for 5 days and had watery diarrhea for 3 days before admission, and he presented to our hospital when the symptoms did not improve. He was hypoxemic at presentation, and a CT scan on admission revealed nonsegmental ground-glass opacities in both lung fields and thickening of the intestinal wall, mainly in the duodenum. Blood tests and chest imaging findings led to suspicion of Legionella pneumonia. Urine specimens were submitted for Legionella antigen testing and were found to be positive, confirming the diagnosis. Subsequent antimicrobial therapy resulted in improvement of the diarrhea symptoms and duodenal wall thickening, and the patient was discharged on hospital day 19. This case shows that Legionella pneumonia can manifest as abdominal symptoms. The possibility of Legionella pneumonia should thus be considered in patients with duodenitis.
7.Laparoscopic Surgery for Ascending Colon Lipoma Causing Recurrent Intussusception: A Case Report and Review of 47 Cases in Japan
Hiroya SUZUKI ; Hiroshi NAKANO ; Sohei HAYASHISHITA ; Mei SAKUMA ; Masashi KANAZAWA
Journal of the Japanese Association of Rural Medicine 2024;73(4):382-389
The patient was a 66-year-old man who presented to our hospital with intermittent abdominal pain. Abdominal ultrasound showed a mass presenting as a target sign in the right abdomen, suggesting intussusception. Subsequent computed tomography (CT) and lower gastrointestinal endoscopy revealed a 5 cm lipoma in the ascending colon. The intussusception had resolved spontaneously, so the patient was followed up on an outpatient basis. Although endoscopic treatment was considered for the lipoma, due to its large size, the patient was referred to our department for surgery 1 month later. A follow-up CT scan revealed a recurrence of the intussusception. Because the patient tolerated oral intake, had normal bowel movements without symptoms of bowel obstruction, and experienced only mild abdominal pain, conservative outpatient observation was continued until laparoscopic-assisted ileocecal resection was performed. The postoperative course was uneventful, and the patient was discharged on postoperative day 8 without any complications. Colonic lipoma causing intussusception is relatively rare. Since lipoma is a benign disease, it is a good candidate for laparoscopic surgery, which offers excellent cosmetic outcomes and rapid postoperative recovery. Even in cases with intussusception, when there is no bowel obstruction and the abdominal pain is mild, elective surgery within 1-3 months can be considered a viable option.
8.A Case of Metronidazole-Induced Encephalopathy During the Treatment of Pelvic Dead Space Infection
Ryo KANODA ; Hiroshi NAKANO ; Hiroya SUZUKI ; Sohei HAYASHISHITA ; Mei SAKUMA ; Masashi KANAZAWA
Journal of the Japanese Association of Rural Medicine 2024;73(4):390-396
Metronidazole is an effective antibacterial agent against anaerobic bacteria, and its use in the gastrointestinal field, particularly in patients with intra-abdominal infections, has increased with the availability of injectable formulations. However, a known side effect of metronidazole is central nervous system impairment, namely, metronidazole-induced encephalopathy. Here, we present a case of a 68-year-old man who underwent laparoscopic abdominoperineal resection for rectal cancer in March of year X. Postoperatively, metronidazole was administered for pelvic dead space infection and perineal wound infection, and the patient continued the oral medication after discharge. In May of year X, the patient was referred to our institution near his home for postoperative adjuvant chemotherapy. In February of year X+1, the patient developed dysarthria, and a FLAIR (fluid-attenuated inversion recovery) image on head magnetic resonance imaging revealed bilaterally symmetric hyperintense lesions in the dentate nuclei of the cerebellum. Suspecting metronidazole-induced encephalopathy based on the medication history, metronidazole was discontinued, leading to symptom improvement within approximately 3 days. We diagnosed metronidazole-induced encephalopathy based on the imaging findings and clinical observations. When using metronidazole, we should pay attention to the dosage and duration of administration and make efforts to detect side effects early.
9.Caspase-11 mediated inflammasome activation in macrophages by systemic infection of A.actinomycetemcomitans exacerbates arthritis
Okano TOKUJU ; Ashida HIROSHI ; Komatsu NORIKO ; Tsukasaki MASAYUKI ; Iida TAMAKO ; Iwasawa MARIE ; Takahashi YUTO ; Takeuchi YASUO ; Iwata TAKANORI ; Sasai MIWA ; Yamamoto MASAHIRO ; Takayanagi HIROSHI ; Suzuki TOSHIHIKO
International Journal of Oral Science 2024;16(3):499-514
Clinical studies have shown that Aggregatibacter actinomycetemcomitans(A.actinomycetemcomitans)is associated with aggressive periodontitis and can potentially trigger or exacerbate rheumatoid arthritis(RA).However,the mechanism is poorly understood.Here,we show that systemic infection with A.actinomycetemcomitans triggers the progression of arthritis in mice anti-collagen antibody-induced arthritis(CAIA)model following IL-1β secretion and cell infiltration in paws in a manner that is dependent on caspase-11-mediated inflammasome activation in macrophages.The administration of polymyxin B(PMB),chloroquine,and anti-CD11b antibody suppressed inflammasome activation in macrophages and arthritis in mice,suggesting that the recognition of lipopolysaccharide(LPS)in the cytosol after bacterial degradation by lysosomes and invasion via CD11b are needed to trigger arthritis following inflammasome activation in macrophages.These data reveal that the inhibition of caspase-11-mediated inflammasome activation potentiates aggravation of RA induced by infection with A.actinomycetemcomitans.This work highlights how RA can be progressed by inflammasome activation as a result of periodontitis-associated bacterial infection and discusses the mechanism of inflammasome activation in response to infection with A.actinomycetemcomitans.
10.Postoperative norepinephrine versus dopamine in patients undergoing noncardiac surgery: a propensity-matched analysis using a nationwide intensive care database
Yoshitaka AOKI ; Mikio NAKAJIMA ; Sho SUGIMURA ; Yasuhito SUZUKI ; Hiroshi MAKINO ; Yukako OBATA ; Matsuyuki DOI ; Yoshiki NAKAJIMA
Korean Journal of Anesthesiology 2023;76(5):481-489
Background:
Choosing catecholamines, such as norepinephrine and dopamine, for perioperative blood pressure control is essential for anesthesiologists and intensivists. However, studies specific to noncardiac surgery are limited. Therefore, we aimed to evaluate the effects of postoperative norepinephrine and dopamine on clinical outcomes in adult noncardiac surgery patients by analyzing a nationwide intensive care patient database.
Methods:
The Japanese Intensive care PAtient Database (JIPAD) was used for this multicenter retrospective study. Adult patients in the JIPAD who received norepinephrine or dopamine within 24 h after noncardiac surgery in 2018–2020 were included. We compared the norepinephrine and dopamine groups using a one-to-one propensity score matching analysis. The primary outcome was in-hospital mortality. Secondary outcomes were intensive care unit (ICU) mortality, hospital length of stay, and ICU length of stay.
Results:
A total of 6,236 eligible patients from 69 ICUs were allocated to the norepinephrine (n = 4,652) or dopamine (n = 1,584) group. Propensity score matching was used to create a matched cohort of 1,230 pairs. No differences in the in-hospital mortality was found between the two propensity score matched groups (risk difference: 0.41%, 95% CI [−1.15, 1.96], P = 0.608). Among the secondary outcomes, only the ICU length of stay was significantly shorter in the norepinephrine group than in the dopamine group (median length: 3 vs. 4 days, respectively; P < 0.001).
Conclusions
In adult patients after noncardiac surgery, norepinephrine was not associated with decreased mortality but was associated with a shorter ICU length of stay than dopamine.


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