Publications by authors named "Takahiro Ichikawa"

Background: No previous study has compared the predictive capacity of various anthropometric indices of cardiovascular disease (CVD) risk in East Asians.

Objective: This study aimed to compare which anthropometric indices have greater impact on CVD in the Japanese population.

Methods: Data from a health checkup program conducted by the Panasonic Corporation between 2008 and 2021, including 160,656 participants, were analyzed.

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Background: In postmenopausal women, lower levels of sex hormone-binding globulin (SHBG) have been linked to various metabolic conditions. The association between SHBG levels and the presence of dyslipidemia was investigated in comparison with other sex hormones.

Methods: Data from 570 postmenopausal women were analyzed.

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Background: Estrogen receptor (ER) expression is critical in breast cancer treatment. While low ER (1-9%) resembles triple-negative cancer with chemotherapy efficacy, the significance of "intermediate expression" (≥ 10%) and the therapeutic efficacy remain unclear. This study explores the differences in staining patterns and molecular characteristics of ER-low to intermediate expression to guide treatment.

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Background: ATPase copper transporting beta (ATP7B) functions as a copper-transporting ATPase that ejects copper from cells. Although high expression of ATP7B has been reported to increase cisplatin resistance, its role in breast cancer (BC) remains unclear. This study aimed to elucidate the function of ATP7B in BC cells and its significance in patients with BC.

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Background: Waist circumference (WC) and body mass index (BMI) are considered useful for the diagnosis of metabolic dysfunction-associated steatotic liver disease (MASLD). This study aimed to investigate the association between the body roundness index (BRI) and a body shape index (ABSI) with incident MASLD, in comparison to WC and BMI.

Methods: Retrospective cohort data from a Japanese health check-up program were analyzed.

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Objectives: There is a relationship between insulin resistance and metabolic dysfunction-associated steatotic liver disease (MASLD) and the estimated glucose disposal rate (eGDR), which has been reported as a surrogate marker of insulin resistance. This study aimed to investigate the association between eGDR and the incident MASLD, and compare the ability to predict incident MASLD with other insulin resistance markers.

Methods: Retrospective cohort data from a health check-up program were analyzed.

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Adenylate cyclase family members have recently received attention as novel therapeutic targets. However, the significance of adenylate cyclase 9 (ADCY9) in breast cancer has not been elucidated. Here, we evaluated expression in breast cancer (BC) cell lines, and polymerase chain reaction array analysis was performed to determine the correlations between expression levels and 84 tumor-associated genes.

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Background: This study aimed to explore the relationship between ultra-processed foods (UPFs) consumption and gut microbiota in patients with type 2 diabetes (T2D).

Methods: This cross-sectional study included 362 participants with T2D. UPFs consumption was assessed using a brief-type self-administered diet history questionnaire, quantified as the density of UPFs intake (g/1000 kcal).

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Article Synopsis
  • Oral exposure to microplastics (MPs) is a significant health issue, potentially causing glucose intolerance and non-alcoholic fatty liver disease (NAFLD), with this study focusing on their effects under normal diets.
  • Mice exposed to high concentrations of polystyrene MPs exhibited increased serum lipid levels and worsened liver function, while not affecting intestinal permeability, but did change gut microbiota and increase inflammation.
  • Findings suggest that even without leaky gut syndrome, high MPs can lead to dyslipidemia and intestinal issues, emphasizing the need for environmental efforts to limit MP exposure.
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Surface proton hopping conduction (SPHC) mechanisms is an important proton conduction mechanism in conventional polymer electrolytes, along with the Grotthuss and vehicle mechanisms. Due to the small diffusion coefficient of protons in the SPHC mechanism, few studies have focused on the SPHC mechanism. Recently, it has been found that a dense alignment of SO groups significantly lowers the activation energy in the SPHC mechanism, enabling fast proton conduction.

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This study aimed to propose a methodology for developing a mechanistic model for viral clearance of the minute virus of mice (MVM) on flow-through anion exchange (AEX) chromatography. Protein surface analysis was applied to investigate the possibility of molecular interaction between the recombinant biotherapeutic and MVM. The protein product-free Tris buffers were spiked with MVM, and the MVM elution profile from AEX chromatography was quantitatively analyzed using quantitative polymerase chain reaction (qPCR) for pooled fractions.

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Article Synopsis
  • A systematic review and meta-analysis was conducted to assess the impact of low-carbohydrate diets on glycemic control in East Asian adults with type 2 diabetes, as previous studies mainly focused on Western populations.
  • The analysis included six randomized controlled trials that evaluated outcomes such as glycated hemoglobin levels, body mass index, and other health metrics over periods of 3 to 18 months.
  • Results indicated that low-carbohydrate diets significantly reduced glycated hemoglobin levels and body mass index compared to control diets, suggesting that these dietary changes could be effective in managing glycemic control for at least 6 months in East Asians.
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This study aimed to evaluate the impact of periodic neck ultrasonography (US) on postoperative surveillance for locoregional disease control of patients with low- and intermediate-risk papillary thyroid carcinoma (PTC) who underwent total thyroidectomy. This retrospective cohort study included patients with PTC who underwent total thyroidectomy and central neck dissection at our institution between January, 2000 and December, 2016. The patients were divided into two groups: the physical examination (PE) group (follow-up by PE without periodic US) and the US group (follow-up by PE with periodic US).

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  • The study investigates how royal jelly (RJ) affects epigenomic changes in the small intestine, with a focus on its impact on metabolic health.
  • RJ administration showed improvements in insulin sensitivity and lipid metabolism without altering body weight, indicating its potential benefits for metabolic disorders.
  • The research identified significant alterations in histone modifications linked to genes involved in cancer progression and metabolism, suggesting that RJ could serve as a therapeutic agent for enhancing metabolic health.
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We designed V-shaped ionic liquid crystals with two sterically congested ionic parts at the vertex. Depending on the degree of steric hindrance, atropisomerisation occurred in solution. All compounds formed bicontinuous cubic phases with double-gyroid structures in the bulk state, partially owing to the co-existence of atropisomers with opposite chirality.

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Aims/introduction: Efficacy of long-term low-carbohydrate diets (LCD) to improve glycemic management for type 2 diabetes remains controversial. Thus, we investigated the association between long-term LCD and glycemic control in individuals with type 2 diabetes.

Materials And Methods: We searched PubMed, Embase and the Cochrane Database for articles published up to June 2023, and included randomized controlled trials conducted on LCD interventions for >12 months in adults with type 2 diabetes.

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Article Synopsis
  • This study investigates the link between overeating, inactivity, and type 2 diabetes using db/db mouse models to explore the underlying pathology.
  • The researchers conducted various analyses, including gene expression and gut microbiota assessment, revealing significant differences in grip strength, fat weight, cytokine levels, and nutrient transporters between db/m and db/db mice.
  • Findings indicate that epigenomic changes in the small intestine may contribute to muscle atrophy in obese mice, highlighting the complex interactions that lead to type 2 diabetes.
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For the development of the next generation of fuel cells, it is essential to create an innovative design principle of polymer electrolytes that is beyond extension of the existing strategy. In the present study, we focused on the surface hopping proton conduction mechanism where an activation energy for proton conduction is greatly reduced by decreasing the distance between SO groups. Our gyroid nanostructured polymer film (Film-G), with a hydrophilic surface where the SO groups are aligned densely and precisely, shows high proton conductivity of the order of 10 S cm when the water content is about 15 wt%.

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Article Synopsis
  • * The diagnosis was confirmed using Polymerase Chain Reaction assays, and the patient recovered after a 10-day treatment with doxycycline.
  • * This case is significant because, although MSF has been noted in sub-Saharan Africa, it hasn't been previously reported in Zambia, indicating a potential health risk in urban regions there.
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Objective: The study objective was to investigate whether changes in metabolic phenotype affect the risk of cardiovascular events.

Methods: All 117,589 participants were included in this retrospective cohort study. The metabolic phenotypes of the participants were assessed at two points (the second evaluation was set 2 years after the first evaluation), and the incidence rate of cardiovascular events was observed for 11 years.

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Context: Branched-chain amino acids (BCAA) are substrates for protein synthesis. Although their intake may contribute to an increase in skeletal muscle mass, elevated serum BCAA levels have been reported to be associated with insulin resistance, potentially resulting in decreased skeletal muscle mass.

Objective: This study aimed to explore the association between elevated serum BCAA levels and longitudinal skeletal muscle loss.

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Low phase angle (PhA), as determined via bioelectrical impedance analysis, reflects unhealthy aging and mortality. In this study, we assessed whether nutritional status, including serum nutritional markers and dietary habits, is related to PhA in older individuals. We recruited 212 participants (aged ≥ 65 years) who underwent medical health checkups.

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Aims: This study aimed to investigate the association between estimated small dense low-density lipoprotein (sd-LDL) and incident type 2 diabetes.

Methods: We analyzed the data from a health checkup under a program conducted by Panasonic Corporation between 2008 and 2018. A total of 120,613 participants were included, of whom 6,080 developed type 2 diabetes.

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  • The study investigates the role of the platelet isoform of phosphofructokinase (PFKP) in breast cancer (BC), focusing on its expression levels and functions in cancer cells.
  • Researchers assessed PFKP expression in various BC and non-cancerous cell lines, discovering it was notably higher in certain aggressive BC types and correlated with other cancer-related genes.
  • Results showed that reducing PFKP levels decreased cell proliferation, invasiveness, and migration in multiple BC cell lines, suggesting that PFKP could be a potential new therapeutic target for treating breast cancer.
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