Publications by authors named "Yamada G"

L-type calcium channel antagonists are uncommon causes of myoclonus, and the underlying mechanism remains unclear. Here, we report a case of parkinsonian syndrome with deterioration of preexisting myoclonus after nifedipine use. A 96-year-old woman was administered a single dose of sustained-release nifedipine for chest pain.

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Background/objectives: Although the protective effects of zinc against COVID-19 are documented, its impact on COVID-19 vaccine immunogenicity remains unknown.

Methods: We conducted a prospective study involving a cohort of 79 Japanese individuals (aged 21-56 years; comprising three subcohorts) and measured their serum zinc levels pre-vaccination and anti-SARS-CoV-2 IgM/IgG levels pre- and post-vaccination over 4 months.

Results: Serum zinc concentrations ranged between 74-140 and 64-113 μg/dL in male and female individuals, respectively, with one male and 11 female participants exhibiting subclinical zinc deficiency (60-80 μg/dL).

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A 71-year-old man with silicosis was treated for infection. Antimycobacterial treatment for was terminated 1 year after a negative test result for the bacteria on sputum examination. One year following the treatment, the patient developed pneumonitis.

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Drug therapy for secondary lymphedema has not yet been established. Conventional oral and intravenous administration is difficult to administer in sufficient doses due to adverse events. Therefore, it is necessary to develop a transdermal delivery system that can deliver high concentrations of drugs to the edema area.

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Background: Recent progress in molecular and signal analyses revealed essential functions of cellular signals including androgen and related growth factors such as Wnt regulators for external genitalia (ExG) development and its pathogenesis. Accumulated data showed their fundamental functions also for erectile tissue (corporal body) development and its abnormalities. The current review focuses on such signals from developmental and functional viewpoints.

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Introduction: In many mammals, the testes descend from its abdominal position on the mesonephric kidney and are housed in the scrotum. It has been speculated that metatherians and eutherians might have acquired the scrotal testis independently because metatherians have the scrotum cranially to the phallus, while eutherians, such as humans and mice, possess it caudally. Rather, recent studies based on sequence comparisons of testis-descent-related genes indicate that the metatherian-eutherian common ancestor might already possess the descent mechanisms.

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Article Synopsis
  • - This study investigates how effective remdesivir is in helping noncritical COVID-19 patients with severe kidney issues, focusing on whether it can lower the chances of death or the need for invasive treatments.
  • - Researchers examined data from 1,449 patients with severe renal insufficiency and found that those who started remdesivir early (within 2 days) had significantly lower mortality or need for invasive mechanical ventilation compared to those who did not receive it.
  • - The results suggest that administering remdesivir soon after symptoms appear can be beneficial for noncritical COVID-19 patients facing severe renal problems, as it reduces the risk of serious outcomes.
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  • The study found that individuals with the rs671 variant had a better cellular immune response to COVID-19 vaccines, even though their humoral (antibody) response was lower.
  • The researchers utilized the ELISPOT assay to measure cellular immunity and observed increased immune responses in rs671 carriers six months after vaccination, compared to non-carriers.
  • The results indicate that the rs671 variant may enhance protection against SARS-CoV-2 infections, highlighting its potential for improving COVID-19 prevention strategies and drug development.
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Background: The annual administration of the influenza vaccine is the most effective method for preventing influenza. We have evaluated the effectiveness of the inactivated influenza vaccine in children aged 6 months to 15 years across the seasons from 2013/2014 to 2022/2023. This study aims to investigate the effectiveness of the inactivated influenza vaccine in the 2023/2024 season, the first year following the easing of strict COVID-19 measures, and possibly the last season when only the inactivated vaccine is available on the market.

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Objective: Drunk driving is a major cause of road traffic injuries and deaths in Latin America. We evaluated the impact of a drunk driving intervention in Leon, Mexico on road traffic safety.

Methods: The intervention included increased drunk driving penalties, enhanced sobriety checkpoints and a young adult-focused mass media campaign, beginning 19 December 2018.

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Objectives: We report a case of bacteremia with pyelonephritis in an adult male with an underlying disease caused by α-hemolytic streptococci. α-Hemolytic streptococci were isolated from blood, but it was challenging to identify its species. This study aimed to characterize the causative bacterium SP4011 and to elucidate its species.

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Acute kidney injury (AKI) secondary to severe falciparum malaria possesses a high mortality rate; however, a prognostic marker of renal dysfunction has not yet been identified. Thus, we reported a case of a patient with AKI secondary to falciparum malaria who underwent hemodialysis and a renal biopsy due to prolonged renal dysfunction. The male patient, in his 50 s, presented to our hospital with vomiting, diarrhea, fever, and decreased level of consciousness.

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Background: Posterior interosseous neuropathy is an uncommon cause of peripheral dystonia.

Case Report: A 62-year-old man awakened and noticed right finger drop. A neurological examination revealed posterior interosseous neuropathy with dystonia-like finger movements.

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Purpose: The pathophysiology of penis extends to erectile dysfunction (ED) to conditions including sexually transmitted diseases (STDs) and cancer. To date, there has been little research evaluating vascular drainage from the penis. We aimed to evaluate penile blood flow in vivo and analyze its possible relationship with the lymphatic maker.

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A 75-year-old male with diabetes mellitus was referred to our hospital with an abnormal shadow on chest radiography, based on which he was diagnosed with extensive-disease small-cell lung cancer (ED-SCLC; cT2bN2M1a). The first-line therapy comprised atezolizumab, carboplatin, and etoposide. After four cycles, the patient achieved complete response (CR), and maintenance therapy was initiated with atezolizumab.

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Speed limits are an evidence-based intervention to prevent traffic collisions and deaths, yet their impact on air pollution in cities is understudied. The objective of this study was to investigate the association between lower speed limits and air pollution. We leverage the introduction of a new road safety policy in Mexico City in December 2015 which lowered speed limits, increased fines, and installed speed radars to enforce compliance.

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is shown to be located near super-enhancer (SE) in B-cell tumors, and this gene is frequently mutated and a target of translocation in B-cell tumors. These results suggest roles of the in tumorigenesis; however, its functional properties have been unclear. We found that two mature B-cell lymphoma cell lines expressed mRNA with segment.

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Background: Surgical treatments such as lymphaticovenular anastomosis (LVA) are widely used in addition to conservative treatment of secondary lymphedema. However, their indications and effectiveness for primary lymphedema are unclear. This study aims to objectively demonstrate the effectiveness of LVA for adult-onset primary lymphedema from various perspectives.

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Ambient air pollution is a health concern in Latin America given its large urban population exposed to levels above recommended guidelines. Yet no studies have examined the mortality impact of air pollutants in the region across a wide range of cities. We assessed whether short-term levels of fine particulate matter (PM) from modeled estimates, are associated with cardiovascular and respiratory mortality among adults in 337 cities from 9 Latin American countries.

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Aim: Several studies have shown the efficacy and safety of low-molecular-weight heparin use in coronavirus disease 2019 (COVID-19), but that of unfractionated heparin (UFH) has not been investigated. We investigated the prevalence of bleeding complications during UFH administration, its impact on mortality, and the risk factors of bleeding outcomes associated with UFH.

Methods: This retrospective cohort study was conducted at a single-center tertiary care hospital, including hospitalized patients with COVID-19.

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Here we report the first case of phenytoin intoxication that was closely associated with hand-foot synkinesis. This case suggests a close association between cerebellar dysfunction and hand-foot synkinesis. In patients with hand-foot synkinesis, lesions of not only the secondary motor areas but also the cerebellum should be considered.

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Article Synopsis
  • Non-traumatic chronic skin lesions can lead to tetanus, which was the case for an 85-year-old woman who died from the infection after refusing treatment.
  • Many individuals born in Japan before 1968 are unvaccinated against tetanus, increasing their risk of severe outcomes.
  • The text emphasizes the importance of vaccinating older adults with chronic skin conditions in Japan to prevent tetanus, especially those who have never received the vaccine.
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Background: Lymphedema is an intractable disease that can be caused by injury to lymphatic vessels, such as by surgical treatments for cancer. It can lead to impaired joint mobility in the extremities and reduced quality of life. Chronic inflammation due to infiltration of various immune cells in an area of lymphedema is thought to lead to local fibrosis, but the molecular pathogenesis of lymphedema remains unclear.

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Article Synopsis
  • The study aimed to analyze changes in participant characteristics over time to improve convalescent plasma donation methods for COVID-19 patients.
  • Data from April 2020 to November 2021 showed a decrease in sample eligibility, initially below 20% after a year, with a shift toward enrolling more participants beyond 120 days post-infection.
  • The research concluded that monitoring eligibility rates and factors like vaccination and infection rates is crucial for effective plasma donation recruitment as pandemics evolve.
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