Publications by authors named "Mami Nishiyama"

Objective: Although psychological distress is a prevalent issue among patients with amyotrophic lateral sclerosis (ALS) and can impact survival, the risk factors contributing to this distress remain insufficiently understood.

Methods: Patients with ALS who completed the Profile of Mood States (POMS) between June 2017 and March 2022 were included. Participants with moderate to severe cognitive decline were excluded, resulting in the recruitment of 121 patients.

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In verapamil-sensitive left posterior fascicular ventricular tachycardia (LPF-VT), radiofrequency catheter ablation (RFA) is performed targeting mid-to-late diastolic potential (P1) and presystolic potential (P2) during tachycardia. This study included four patients who had undergone electrophysiological study (EPS) and pediatric patients with verapamil-sensitive LPF-VT who had undergone RFA using high-density three-dimensional (3D) mapping. The included patients were 11-14 years old.

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Neomacrophorins I-III (1-3) and X have previously been isolated from Trichoderma sp. 1212-03. Their mode of action against cancer cells and the mechanism of biosynthesis of the characteristic [4.

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Arundifungin (1) has been reported as a potent antifungal agent against Candida and Aspergillus spp; however, only its planar structure has been disclosed. This paper describes the assignment of the relative and absolute configuration of 1, which includes (a) determination of the relative configuration of the ABCD polycyclic ring moiety on the basis of detailed nuclear magnetic resonance (NMR) analysis, followed by the confirmation with density functional theory (DFT)-based C NMR chemical shift calculations, (b) determination of the absolute configuration of the ABCD polycyclic ring moiety by observing a positive Cotton effect at 217 nm because of the C-8/C-9 tetrasubstituted double bond and its reproduction using DFT calculations, (c) determination of the configurational relationship between C-17 and C-20 by a combination of nuclear Overhauser effect (NOE) analysis and DFT-based conformational analysis, and (d) determination of the relative and absolute configuration of the C-24 and C-25 asymmetric centers on the acyclic side chain by a combination of chemical derivatization including modified Mosher's method and DFT-based conformational analysis, followed by electronic circular dichroism (ECD) spectral reproduction. Present study also discovered 26-deoxyarundifungin (2) of which relative structure was readily elucidated by H and C spectral comparison with those of 1.

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Article Synopsis
  • The novel compound 12-deoxytrichodermin was isolated from the fungus Trichoderma sp. 1212-03 for research on its effects against colon cancer cells and a specific fungus.
  • The study indicated that the presence of the 12-epoxide group is vital for the effectiveness of certain trichothecenes in killing cancer cells, while it's not necessary for others.
  • However, the 12-epoxide is essential for the antifungal properties of trichothecenes, emphasizing its importance in different biological activities.
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