Background: Vertebral compression fractures (VCFs) are associated with reduced gait ability and functional impairment in older adults. Factors related to walking aid use at discharge remain unclear. This study examined associations between walking aid use and physical function at discharge. Methods: This cross-sectional study included 143 patients with VCFs discharged from Kurume Rehabilitation Hospital. Participants were classified into independent ambulation and walking aid groups, the latter subdivided into cane and walker users. Pain, cognitive function, handgrip strength, 30-second chair stand test, Berg Balance Scale (BBS), and skeletal muscle mass index (SMI) were assessed at discharge. Logistic regression identified factors associated with walking aid use, and exploratory analysis compared cane and walker users. Receiver operating characteristic (ROC) analysis was used to determine the BBS cutoff. Results: BBS at discharge was significantly associated with walking aid use (odds ratio [OR]=0.85; 95% confidence interval [CI] 0.77–0.93; p<0.001). In exploratory analysis, pain (OR=1.43; 95% CI 1.03–1.96; p=0.029) and SMI (OR=0.40; 95% CI 0.20–0.79; p=0.010) were associated with cane versus walker use. The optimal BBS cutoff was 48.5 (area under the curve [AUC]=0.83). Conclusion BBS was associated with the distinction between independent ambulation and walking aid use, while pain and SMI were associated with differences among walking aid users. These findings may inform clinical decision-making for walking aid selection at discharge.

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.

BACKGROUND: In response to growing concerns about the health effects of quasi-millimeter waves (qMMW) used in 5th-generation wireless systems, conservative whole-body exposure thresholds based on indirect evidence have been proposed. The guidelines define a whole-body average specific absorption rate (WBA-SAR) of 4 W/kg which causes a 1 °C increase in core temperature, as the operational threshold for adverse health effects. To address the lack of direct evidence, we recently reported that a 30-minute exposure to qMMW at 4.6 W/kg resulted in a 1 °C increase in rat core temperature. Here, we further analyzed the near-threshold stress response for the first time, using biological samples from the aforementioned and additional experiments. METHODS: A total of 59 young Sprague-Dawley rats (240-322 g) were exposed to 28 GHz for 40 minutes at WBA-SARs of 0, 3.7, and 7.2 W/kg, under normal (22.5 °C, 45-55% humidity), and heat (32 °C, 70% humidity) conditions. Rats were restrained in acrylic holders for dose control. We repeatedly measured serum and urinary biomarkers of stress response, aggregated the data, and analyzed them using a single statistical mixed model to subtract the effects of sham exposure and between-subject variation. RESULTS: Sham exposure induced stress responses, suggesting an effect of restraint. After the subtraction of the sham exposure effect, 28 GHz appeared to induce stress responses as evidenced by elevated serum-free corticosterone 1 or 3 days after the exposure, which was more evident in animals with a change in rectal temperature exceeding 1 °C. Urinary-free catecholamines demonstrated an inhibitory property of 28 GHz frequency exposure on the stress response as evidenced by noradrenaline on the day of exposure. Heat exposure enhanced this effect, suggesting a possible role of noradrenaline in heat dissipation by promoting cutaneous blood flow, a notion supported by the correlation between noradrenaline levels and tail surface temperature, a critical organ for heat dissipation. CONCLUSIONS This study is the first to demonstrate that qMMW whole-body exposure can alter the stress response as indicated by corticosterone and noradrenaline at near-threshold levels. Our findings may provide insight into the biological basis of the whole-body exposure thresholds in the international guidelines.
Animals ; Rats ; Rats, Sprague-Dawley ; Male ; Restraint, Physical ; Stress, Physiological/radiation effects* ; Corticosterone/blood* ; Biomarkers/blood* ; Microwaves/adverse effects*

Purpose: The prognosis for patients with metastatic renal cell carcinoma (RCC) has markedly improved with the advent of molecular targeted agents and immune checkpoint inhibitors. However, few studies have reported the outcomes of systemic therapy in metastatic RCC patients undergoing dialysis. This study aimed to evaluate the clinical outcomes of systemic therapy for metastatic RCC patients on dialysis. Materials and Methods: We retrospectively reviewed 253 patients with metastatic RCC (17 on dialysis and 236 not on dialysis) who received systemic therapy at Keio University Hospital in Japan. Progression-free survival (PFS), overall survival (OS), and cancer-specific survival (CSS) were assessed using the Kaplan-Meier method. Results: Clear cell RCC was diagnosed pathologically in 52.9% of dialysis patients and 82.6% of nondialysis patients (p=0.007). Among dialysis patients, 58.8% were classified as intermediate risk and 41.2% as poor risk. Regarding first-line therapy, 4 dialysis patients received cytokine therapy, 11 received tyrosine kinase inhibitors, 1 received mammalian target of rapamycin inhibitors, and 1 received immune checkpoint inhibitors. The median PFS (6.9 months, p<0.001), OS (21.2 months, p=0.001), and CSS (29.1 months, p=0.003) were all significantly shorter in dialysis patients. After propensity score matching, no significant difference was observed in PFS. However, significant differences persisted in OS and CSS between the dialysis and nondialysis groups. Conclusion Both OS and CSS were significantly shorter in dialysis patients with metastatic RCC compared to those not on dialysis.

The aim of this study was to clarify the nature of psychological conflict among men aged 80 years or older who were living alone in eight depopulated municipalities designated by Japan's Ministry of Internal Affairs and Communications. Semi-structured interviews were conducted with 34 elderly men who were living alone. Text-mining analysis revealed that elderly men living alone in depopulated villages were feeling lonely because they [did not have anyone to talk to] but did not want to leave their homes. They were aware of [progressive decline in physical functions] after the age of 80 and thought that [it would be the end if no longer being able to walk]. Because they needed to drive a car in order to continue living their lives, they were [conflicted about continuing to drive] and [anxious that they would not be able to go shopping] if they were to stop driving. The elderly men living in depopulated villages had developed human relationships and attachments to their hometowns, and they wanted to continue living in the homes they were born and raised in until the end of their lives. At the same time, they were struggling with conflicts related to loneliness caused by the weakening of human relationships, feelings of self-deficiency due to physical decline, and a sense of crisis stemming from the decline of the community. On the other hand, one factor supporting them was their motivation to protect the community. These findings suggest the need for a community care system that helps older people feel a sense of solidarity with, and a sense of contribution to, the community.

Background/Aims: To validate endoscopic ultrasound-guided tissue acquisition (EUS-TA) used in conjunction with stereomicroscopic on-site evaluation (SOSE) as a preoperative diagnostic tool for resectable pancreatic cancer (R-PC) and borderline resectable PC (BR-PC). Methods: Seventy-eight consecutive patients who underwent EUS-TA for suspected R-PC or BR-PC were enrolled. The primary endpoint was the sensitivity of EUS-TA together with SOSE based on the stereomicroscopically visible white core (SVWC) cutoff value. One or two sites were punctured by using a 22-gauge biopsy needle for EUS-TA, based on the SOSE findings. Results: We collected 99 specimens from 56 and 22 patients with R-PC and BR-PC, respectively. Based on the SOSE results, we performed 57 procedures with one puncture. The SVWC cutoff values were met in 73.7% and 73.1% of all specimens and in those obtained during the first puncture, respectively. The final diagnoses were malignant and benign tumors in 76 and two patients, respectively. The overall sensitivity, specificity, and accuracy of EUS-TA for the 78 lesions were 90.8%, 100%, and 91.0%, respectively. The sensitivity for malignant diagnosis based on the SVWC cutoff value were 89.5% and 90.4% for the first puncture and all specimens, respectively. Conclusions The sensitivity of EUS-TA in conjunction with SOSE for malignancy diagnosis in patients with suspected R-PC or BR-PC was 90.4%.

Background/Aims: To validate endoscopic ultrasound-guided tissue acquisition (EUS-TA) used in conjunction with stereomicroscopic on-site evaluation (SOSE) as a preoperative diagnostic tool for resectable pancreatic cancer (R-PC) and borderline resectable PC (BR-PC). Methods: Seventy-eight consecutive patients who underwent EUS-TA for suspected R-PC or BR-PC were enrolled. The primary endpoint was the sensitivity of EUS-TA together with SOSE based on the stereomicroscopically visible white core (SVWC) cutoff value. One or two sites were punctured by using a 22-gauge biopsy needle for EUS-TA, based on the SOSE findings. Results: We collected 99 specimens from 56 and 22 patients with R-PC and BR-PC, respectively. Based on the SOSE results, we performed 57 procedures with one puncture. The SVWC cutoff values were met in 73.7% and 73.1% of all specimens and in those obtained during the first puncture, respectively. The final diagnoses were malignant and benign tumors in 76 and two patients, respectively. The overall sensitivity, specificity, and accuracy of EUS-TA for the 78 lesions were 90.8%, 100%, and 91.0%, respectively. The sensitivity for malignant diagnosis based on the SVWC cutoff value were 89.5% and 90.4% for the first puncture and all specimens, respectively. Conclusions The sensitivity of EUS-TA in conjunction with SOSE for malignancy diagnosis in patients with suspected R-PC or BR-PC was 90.4%.