Publications by authors named "Chieko Miura"

Article Synopsis
  • The study investigates how magnesium (Mg) bioabsorbable implants corrode in response to their biological environment, particularly during the healing process, using a rat model.
  • Results show that the presence of hematoma increases Mg corrosion compared to non-hematoma conditions, resulting in significant weight loss of the implants after 7 days.
  • The findings highlight that the acidic and hypoxic conditions of hematomas accelerate corrosion, emphasizing the need for careful surgical planning to minimize bleeding and improve the design of Mg-based devices to prevent early failure.
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Introduction: Although musculoskeletal involvement of Neurofibromatosis type 1 (NF1) has been well documented, bone formation, or ossification, within neurofibroma, has been scarcely documented in literature. Here, we report a rare case of ossified neurofibroma in a patient with long history of NF1.

Presentation Of Case: 73-Year-old female with childhood-onset NF1 and surgical history of resection for multiple neurofibromas, presented with right ptosis and eyebrow ptosis.

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Calciphylaxis is characterized by extremely painful skin ulcers and develops in patients with or without severe kidney diseases. Herein, a female patient without renal dysfunction developed calciphylaxis in the right lower extremity and underwent successful surgical debridement and split-thickness skin grafting. Nevertheless, prompt wound evaluation and proper surgical approaches are essential.

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Magnesium (Mg) alloys are considered promising materials for biodegradable medical devices; however, the initial effects and distribution of released Mg ions following implantation are unclear. This is addressed in the present study, using two types of Mg alloys implanted into rats. An in vitro immersion test was first carried out to quantify Mg ions released from the alloys at early stages.

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Biodegradable magnesium (Mg) alloys are the most promising candidates for osteosynthesis devices. However, their in vivo corrosion behaviour has not been fully elucidated. The aim of this study was to clarify the influence of the physiological environment surrounding Mg alloys on their corrosion behaviour.

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Background: Infectious mononucleosis is a clinical syndrome most commonly associated with primary Epstein-Barr virus (EBV) infection. In adults, the symptoms can often be severe and prolonged, sometimes causing serious complications. Analgesic or antipyretic drugs are normally used to relieve the symptoms.

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Aim: Chronic renal failure (CRF) is histopathologically characterized by tubulointerstitial fibrosis in addition to glomerulosclerosis. Although mast cells are known to infiltrate into the kidneys with chronic inflammation, we know little about their contribution to the pathogenesis of renal fibrosis associated with CRF. The aim of this study was to reveal the involvement of mast cells in the progression of renal fibrosis in CRF.

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Background: Anti-allergic drugs, such as tranilast and ketotifen, inhibit the release of chemokines from mast cells. However, we know little about their direct effects on the exocytotic process of mast cells. Since exocytosis in mast cells can be monitored electrophysiologically by changes in the whole-cell membrane capacitance (Cm), the absence of such changes by these drugs indicates their mast cell-stabilizing properties.

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