Publications by authors named "S Matsumura"

Soluble epoxide hydrolase (sEH) is a bifunctional enzyme with epoxide hydrolase activity in the C-terminal domain (C-EH) and lipid phosphate phosphatase activity in the N-terminal domain (N-phos). The C-EH hydrolyzes bioactive epoxy fatty acids such as epoxyeicosatrienoic acid (EET). The N-phos hydrolyzes lipid phosphomonesters, including the signaling molecules of lysophosphatidic acid (LPA).

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: The accurate prediction of postoperative renal function (post-RF) in living kidney donors is essential for optimizing donor safety and long-term health. After nephrectomy, renal function can be significantly altered, owing to the functional adaptation of the remaining kidney; however, the extent of this has not been investigated. This study aimed to examine how various donor factors affect functional adaptation after nephrectomy, and to develop a new predictive model.

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Cyclic adenosine monophosphate-response element-binding protein-1-regulated transcription coactivator-1 (CRTC1), a cytoplasmic coactivator that translocates to the nucleus in response to cAMP, is associated with obesity. We previously reported that deficiency in melanocortin-4 receptor (MC4R)-expressing neurons, which regulate appetite and energy metabolism in the brain, causes hyperphagia and obesity under a high-fat diet (HFD). HFD is preferred for mice, and the dietary fat in HFD is the main factor contributing to its palatability.

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Article Synopsis
  • Renal fibrosis worsens with oxidative stress during renal failure, and this study investigates whether silicon-based agents can help combat fibrosis in a mouse model.
  • Mice treated with silicon showed a significant reduction in renal fibrosis, tubular cell death, and harmful protein expressions by day 14 after surgery compared to untreated groups.
  • RNA sequencing indicated that silicon treatment downregulated pathways related to tissue fibrosis and reduced levels of pro-fibrotic factors and oxidative stress in the renal tissues.
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  • The study explores the measurement of glomerular filtration rate (GFR), suggesting that the rare amino acids d-serine and d-asparagine can provide a more accurate assessment than traditional urine collection methods.
  • A cross-sectional analysis involving 209 kidney transplant donors and recipients utilized urine levels of these amino acids to establish an equation for estimating urine volume (eUV), which helped correct GFR measurements.
  • Results showed that d-serine and d-asparagine clearances had less bias compared to creatinine, highlighting their potential for improving GFR estimations and urine volume assessments.
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