Publications by authors named "Masako Matsumoto"

It has been reported that Graves' disease (GD) sometimes improves spontaneously during pregnancy, although exacerbation of GD during postpartum period or relapse of hyperthyroidism caused by GD might occur. This study aimed to investigate the incidence of postpartum diagnosis of thyroid eye disease (TED) in relation to thyroid dysfunction. This retrospective cross-sectional study enrolled 11,104 deliveries from the patients with GD between January 2004 and August 2022.

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A 37-year-old, never-smoker, pregnant woman diagnosed with Graves' disease who had stable thyroid eye disease (TED) before pregnancy presented with aggravated proptosis and eyelid swelling at 13 weeks of pregnancy. Despite the administration of local triamcinolone and 3 cycles of corticosteroid pulse therapy from 25 to 28 weeks, the patient's visual acuity decline necessitated postpartum orbital decompression surgery. Although TSH receptor antibody (TRAb) levels decreased during the mid- to late term of pregnancy, the TED worsened.

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  • This study examined the expression of proteins crucial for uterine contractions, comparing tissue samples from 38 PAM patients and 10 controls during cesarean sections.
  • Results showed reduced expression of several contraction-associated proteins in PAM tissues, suggesting that inflammation could hinder uterine contractions and contribute to uterine atony, prompting the need for further research on the underlying mechanisms.
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The placenta is the largest fetal organ, which connects the mother to the fetus and supports most aspects of organogenesis through the transport of nutrients and gases. However, further studies are needed to assess placental pathology as a reliable predictor of long-term physical growth or neural development in newborns. The Consensus Statement of the Amsterdam Placental Workshop Group (APWGCS) on the sampling and definition of placental lesions has resulted in diagnostic uniformity in describing the most common pathological lesions of the placenta and contributed to the international standardization of descriptions of placental pathology.

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Agranulocytosis is a serious adverse effect of methimazole (MMI) and propylthiouracil (PTU), and although there have been reports suggesting a dose-dependent incidence in relation to both drugs, the evidence has not been conclusive. The objective of our study was to determine whether the incidences of agranulocytosis induced by MMI and PTU exhibit dose-dependency. The subjects were 27,784 patients with untreated Graves' disease, 22,993 of whom were on an antithyroid drug treatment regimen for more than 90 days.

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The eelgrass Zostera marina L. has several economic roles, from its earlier usage in the insulation industry to protecting the earth from global warming. In this study, we aimed to discover the cosmetic potential of Z.

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Objective This study assessed the efficacy of machine learning in predicting thyrotoxicosis and hypothyroidism [thyroid-stimulating hormone >10.0 mIU/L] by leveraging age and sex as variables and integrating biochemical test parameters used by the Japan Society of Health Evaluation and Promotion (JHEP) and the Japan Society of Ningen Dock (JND). Methods Our study included 20,653 untreated patients with Graves' disease, 3,435 untreated patients with painless thyroiditis, 4,266 healthy individuals, and 18,937 untreated patients with Hashimoto's thyroiditis.

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  • Amniotic fluid embolism (AFE) and placental abruption (PA) are pregnancy-related conditions linked to severe blood clotting issues known as disseminated intravascular coagulation (DIC).
  • AFE tends to have more pronounced fibrinolysis compared to PA and may activate a different mechanism for the fibrinolytic process.
  • In a study comparing various coagulation factors in patients with AFE, severe PA, and healthy controls, results showed increased levels of certain markers in both AFE and severe PA, but AFE also exhibited significant changes in specific agents associated with enhanced fibrin breakdown.
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Appropriate administration of anti-inflammatory and immunosuppressive treatment (AIIST) is important for patients with Graves' orbitopathy (GO). This study aimed to clarify the incidence and risk factors for GO treated with AIIST and propose a predictive score, among newly diagnosed Graves' disease (GD) patients in Japan. A total of 1,553 GD patients who were newly diagnosed during the year 2011 were investigated.

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A large variety of natural plants are widely produced and utilised because of their remarkable pharmacological effects. In this study, two phenolic glycosides were isolated for the first time from Schiede (Orchidaceae) from Kyushu, Japan: bis [4-(-D - O-glucopyranosyloxy)-benzyl] ()-2-isopropylmalate (1: ) and bis 4-[-D--glucopyranosyloxy)-benzyl]-(2,3)-2-isopropyl tartrate (2: ). We have discovered that the crude extract of leaves and stems and its two phenolic glycosides (compounds 1:  - 2: ) are highly effective in reversing skin senescence.

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Background: Perinatal management of congenital platelet dysfunction represents a challenge. One of the major concerns is whether neuraxial anesthesia can be applicable for cesarean delivery. We present a patient with thrombasthenia who underwent emergency cesarean delivery.

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Purposes: To establish the appropriate staging system and assess the role of curative thyroidectomy alone (Surgery) vs. involved-site radiation therapy after open biopsy (OB-ISRT) in stage IE mucosa-associated lymphoid tissue (MALT) lymphoma.

Methods: We examined the Tokyo Classification as a modified classification.

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  • The study investigated how potassium iodide (KI) affects radioiodine uptake (RAIU) in patients with Graves' disease (GD) prior to radioisotope therapy.
  • A total of 82 patients on KI treatment were compared to 354 patients on thiamazole (MMI) treatment, ensuring that all participants had low urinary iodine excretion.
  • Results showed that RAIU was significantly lower in the KI group compared to the MMI group, suggesting KI may suppress RAIU more effectively due to different suppression mechanisms.
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  • A study was conducted on 103 adult patients with congenital hypothyroidism (CH) diagnosed through newborn screening to evaluate their thyroid morphology and function, focusing on those born after 1979.
  • The patients were categorized into Goiter, Normal gland, and Dysgenesis groups; results indicated a significantly low serum free triiodothyronine/free thyroxine ratio in the Dysgenesis group and a higher incidence of thyroid nodules in female CH patients compared to non-CH women.
  • Genetic defects linked to goitrous congenital hypothyroidism were found in 89% of the Goiter group, suggesting that patients with dyshormonogenesis should have regular thyroid ultrasounds due to their increased risk for thyroid nodules
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  • The study investigates neonatal hypothyroidism in newborns of mothers with Graves' disease who continued antithyroid drug (ATD) treatment until delivery, finding an incidence of 19% for methimazole (MMI) users and 12.8% for propylthiouracil (PTU) users.
  • It identifies that the daily ATD doses during the third trimester are crucial predictors for risk; with cutoff doses of 10 mg/day for MMI and 150 mg/day for PTU being significant.
  • Higher maternal thyrotropin receptor antibody (TRAb) levels also correlate with increased risks, emphasizing the need for careful monitoring of pregnant women undergoing treatment for Graves' disease.
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This study targets the evaluation of melanin synthesis inhibition activity of the bamboo shoot skin as agro-waste. The total methanolic extract of bamboo peel extract was evaluated for its skin protective effects via measuring its melanin inhibitory activity and its suppression activity on the expression of tyrosinase mRNA levels. Results showed that bamboo peel extract has a good ability for the inhibition of melanin synthesis so further studies were performed for the isolation of its constituents.

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The broader objective of this study is to identify natural materials that might inhibit the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. We have focused on stingless bee honey, which has a unique taste that is both sweet and sour and sometimes bitter. We screened 12 samples of honey from 11 species of stingless bees using an angiotensin-converting enzyme 2 (ACE2)-spike protein-binding assay and phytochemical analysis.

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Graves' disease has been reported to affect the clinical features of moyamoya disease (MMD), an occlusion of the circle of Willis. This study aimed to clarify the characteristics of MMD in patients with Graves' disease. This was a single-center, retrospective study.

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  • The study investigates the edible and medicinal uses of extracts and hibiscus acid, focusing on their biological activities.
  • It evaluates their effects on skin fibroblasts, assessing extracellular matrix synthesis and anti-inflammatory properties through specific tests.
  • Hibiscus acid demonstrated strong anti-oxidative stress effects, helping to maintain healthy levels of glutathione in skin cells and suggesting a potential for reversing skin aging.
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The severity of hyperthyroidism in Graves' disease (GD) has been reported to be worse in younger patients and to gradually improve with advancing age, accompanied by declining thyrotropin (TSH) receptor antibody (TRAb) values. This study was conducted to explore the extent to which the declining TRAb production may contribute to a decrease in severe hyperthyroidism with advancing age in patients with GD. This study was a cross-sectional analysis of retrospectively reviewed data.

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Epidemiologic studies have shown a high prevalence of multiple sclerosis (MS) in Europe and North America, and a low prevalence in East Asia. Mushrooms contain various biological response modifiers (BRMs) and are widely used in traditional Chinese medicine in East Asian countries. To investigate whether mushrooms have potential beneficial effects on MS, we administered mushrooms to cuprizone (bis-cyclohexanone-oxalyldihydrazone, CPZ)-induced MS model mice.

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Although considered an abundant source of agricultural by-products, avocado ( Mill.) seed, with several biological activities and bioactive components, might become a promising resource for phytopharmaceutical development. In this study, through bioassay-guided isolation of the main -glucosidase inhibitors in avocado seed, we discovered the major -glucosidase inhibitor to be avocado seed oligomeric proanthocyanidin complex (ASOPC).

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