Publications by authors named "Momoko Yamada"

Article Synopsis
  • The study aims to create a decision tree model to identify heart failure patients needing therapeutic drug monitoring (TDM) for high levels of mono-desethylamiodarone (MDEA), an amiodarone metabolite linked to tissue toxicity.
  • A retrospective cohort of 157 adults was analyzed to determine MDEA plasma concentrations, using a statistical algorithm that identified key risk factors affecting these levels.
  • Results showed that patients on more than 100 mg of amiodarone daily and with a body mass index of 22.3 kg/m² or less are at significant risk for elevated MDEA levels, suggesting the need for regular monitoring to prevent potential toxicity.
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Digoxin toxicity (plasma digoxin concentration ≥0.9 ng/mL) is associated with worsening heart failure (HF). Decision tree (DT) analysis, a machine learning method, has a flowchart-like model where users can easily predict the risk of adverse drug reactions.

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Background: Polypharmacy, defined as the concurrent use of over six drugs, is common in the treatment of heart failure (HF); however, unpredictable drug interactions with bepridil may occur. In this study, we have elucidated the influence of polypharmacy on plasma bepridil concentrations in patients with HF.

Methods: We conducted a multicenter retrospective study involving 359 adult patients with HF who received oral bepridil.

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Surface-enhanced Raman scattering (SERS) nanoprobes have shown tremendous potential in in vivo imaging. The development of single oligomer resolution in the SERS promotes experiments on DNA and protein identification using SERS as a nanobiosensor. As Raman scanners rely on a multiple spectrum acquisition, faster imaging in real-time is required.

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Fucosylated haptoglobin is a well-established glyco-biomarker of pancreatic cancer. We recently established a novel anti-glycan antibody (10-7G mAb) that specifically recognizes fucosylated haptoglobins, including prohaptoglobin (proHpt). Serum concentrations of the 10-7G value, as measured by ELISA, were increased in patients with pancreatic cancer relative to the healthy controls.

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Background: Inflammatory bowel disease (IBD) is a chronic, relapsing inflammation of the digestive tract. Although fecal and serum biomarkers have been extremely important and supportive for monitoring of IBD, their low sensitivity and high variability characteristics limit clinical efficacy. Thus, the establishment of better biomarkers is expected.

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Article Synopsis
  • - Erlotinib's absorption is negatively affected when patients use gastric acid suppression therapy, which makes it less soluble in higher pH conditions.
  • - Research found that erlotinib's solubility increased in acidic solutions, particularly in apple juice, compared to tap water and HCl solutions.
  • - When erlotinib was administered in apple juice or acidic conditions to rats on gastric acid suppression, plasma levels were significantly higher, suggesting that using acidic beverages could enhance erlotinib absorption in affected patients.
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Introduction: Adding neurokinin-1 receptor antagonist (NKRA) to 5-hydroxytryptamine-3 receptor antagonist and dexamethasone (DEX) improved carboplatin (CBDCA)-induced chemotherapy-induced nausea and vomiting (CINV) in patients with thoracic cancer. NKRAs with high-drug cost are raising medical expenses. Olanzapine (OLZ) is less expensive and can be expected to have an excellent effect on CINV.

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Regulation of the Hippo pathway via phosphorylation of Yorkie (Yki), the homolog of human Yes-associated protein 1, is conserved from to humans. Overexpression of a non-phosphorylatable form of Yki induces severe overgrowth in adult fly eyes. Here, we show that mRNA associates with microsomal fractions and forms foci that partially colocalize to processing bodies in the vicinity of endoplasmic reticulum.

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Hydroxymethylcytosine (hmC) is a natural nucleobase, which is converted from methylcytosine (mC) by tet methylcytosine dioxygenase (TET) family (TET1-3) enzymes. Decrease of genomic hmC is postulated to confer a risk for myeloid-lineage as well as T-cell neoplasms, based on the fact that loss-of-function mutations in the TET2 gene were frequently identified in these diseases. The relationship between hmC and aging remains to be elucidated.

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Thermal phase separation of aqueous triethylamine (TEA) solutions (TEA wt % = 6.5-6.7 in H2O) was induced by irradiating a focused 1064-nm laser beam (spot size approximately 1 mum) under an optical microscope, and this produced a single micrometer-sized TEA droplet as demonstrated by in situ Raman microspectroscopy.

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To examine the roles of PLD (phospholipase D) in the regulation of the apoptotic process, PLD1 and PLD2 were stably overexpressed in S1P3-CHO cells [CHO (Chinese-hamster ovary) cells expressing the S1P (sphingosine 1-phosphate) receptor S1P3]. Treatment of S1P3-CHO cells with ActD (actinomycin D) induced apoptosis, as shown by the occurrence of nuclear fragmentation and the caspase-dependent proteolytic cleavage of PARP [poly(ADP-ribose) polymerase] and protein kinase Cd. Overexpression of either PLD1 or PLD2 protected S1P3-CHO cells from ActD-induced apoptosis, as demonstrated by an increased number of viable cells and inhibition of PARP and protein kinase Cd cleavage.

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Available evidence suggests the involvement of phospholipase D (PLD) in cell proliferation and survival. Phosphoinositide 3-kinase (PI 3-kinase)/Akt and extracellular signal-regulated kinases (ERKs) are signalling molecules that have essential roles in cell proliferation and survival. We previously demonstrated that sphingosine 1-phosphate (S1P)-induced PLD activation via the G-protein-coupled receptor endothelial differentiation gene (EDG) 3/S1P(3) was involved in S1P-induced stimulation of PI 3-kinase and Akt.

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