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  1. Article: Moderate-to-Heavy Alcohol Consumption May Cause a Significant Decrease in Serum High-Density Lipoprotein Cholesterol in Middle-Aged Women: A Cohort Study of the National Database Study in the Kanto 7 Prefectures-4.

    Sekine, Airi / Nakajima, Kei

    Cureus

    2024  Volume 16, Issue 3, Page(s) e55467

    Abstract: Aims Little is known about the association between habitual alcohol consumption and serum high-density lipoprotein cholesterol (HDL-C) in women. We aimed to investigate this association in middle-aged Japanese women in a community-based cohort study ... ...

    Abstract Aims Little is known about the association between habitual alcohol consumption and serum high-density lipoprotein cholesterol (HDL-C) in women. We aimed to investigate this association in middle-aged Japanese women in a community-based cohort study using conventional statistical analyses and explainable artificial intelligence (AI) analysis. Methods We retrospectively investigated the association between alcohol consumption and HDL-C after 10 years in 90,053 women aged 40-64 years whose drinking habits were generally consistent for 10 years. Results After 10 years, 11.3% and 17.9% of subjects had serum HDL-C decreased by ≥10 mg/dL and ≥10%, respectively. In unadjusted analysis, moderate-to-heavy alcohol consumption may both increase and decrease serum HDL-C levels after 10 years. After adjustment for potential confounding factors, moderate (23-45 g/day) and heavy (≥46 g/day) alcohol consumption were each significantly associated with decreases in HDL-C (OR (95% CI): 1.18 and 1.36 (1.11-1.26 and 1.21-1.53) for ≥10 mg/dL, 1.11 and 1.29 (1.05-1.17 and 1.17-1.43) for ≥10%), but not associated with an increase in HDL-C (0.96 and 0.98 (0.91-1.01 and 0.89-1.08) for ≥10 mg/dL, 0.97 and 0.96 (0.93-1.01 and 0.88-1.05) for ≥10%). Further analysis after adjustment for baseline serum HDL-C showed the same results. AI analysis showed that alcohol consumption was the 8th positive contributor to the decrease in HDL-C, following baseline high HDL-C (≥77 mg/dL), high low-density lipoprotein cholesterol (≥133 mg/dL), high body mass index (≥23.1 kg/m
    Language English
    Publishing date 2024-03-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2747273-5
    ISSN 2168-8184
    ISSN 2168-8184
    DOI 10.7759/cureus.55467
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Agreement in All-in-One Dataset between Diagnosis and Prescribed Medication for Common Cardiometabolic Diseases in the NDB-K7Ps.

    Sekine, Airi / Nakajima, Kei

    Epidemiologia (Basel, Switzerland)

    2023  Volume 4, Issue 4, Page(s) 370–381

    Abstract: The Japanese National Database (NDB), a useful data source for epidemiological studies, contains information on health checkups, disease diagnoses, and medications, which can be used when investigating common cardiometabolic diseases. However, before the ...

    Abstract The Japanese National Database (NDB), a useful data source for epidemiological studies, contains information on health checkups, disease diagnoses, and medications, which can be used when investigating common cardiometabolic diseases. However, before the initiation of an integrated analysis, we need to combine several pieces of information prepared separately into an all-in-one dataset (AIOD) and confirm the validation of the dataset for the study. In this study, we aimed to confirm the degree of agreement in data entries between diagnoses and prescribed medications and self-reported pharmacotherapy for common cardiometabolic diseases in newly assembled AIODs. The present study included 10,183,619 people who underwent health checkups from April 2018 to March 2019. Over 95% of patients prescribed antihypertensive and antidiabetic medications were diagnosed with each disease. For dyslipidemia, over 95% of patients prescribed medications were diagnosed with at least one of the following: dyslipidemia, hypercholesterolemia, or hyperlipidemia. Similarly, over 95% of patients prescribed medications for hyperuricemia were diagnosed with either hyperuricemia or gout. Additionally, over 90% of patients with self-reported medications for hypertension, diabetes, and dyslipidemia were diagnosed with each disease, although the proportions differed among age groups. Our study demonstrated high levels of agreement between diagnoses and prescribed medications for common cardiometabolic diseases and self-reported pharmacotherapy in our AIOD.
    Language English
    Publishing date 2023-10-02
    Publishing country Switzerland
    Document type Journal Article
    ISSN 2673-3986
    ISSN (online) 2673-3986
    DOI 10.3390/epidemiologia4040034
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Relationship between non-restorative sleep and body weight in a general population: Results of NDB-K7Ps-Study-1.

    Nakajima, Kei / Sekine, Airi

    Obesity research & clinical practice

    2023  Volume 17, Issue 2, Page(s) 171–173

    MeSH term(s) Humans ; Body Weight ; Sleep ; Body Mass Index ; Thinness
    Language English
    Publishing date 2023-03-29
    Publishing country Netherlands
    Document type Letter
    ZDB-ID 2274031-4
    ISSN 1878-0318 ; 1871-403X
    ISSN (online) 1878-0318
    ISSN 1871-403X
    DOI 10.1016/j.orcp.2023.03.004
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Acute liver failure increases kynurenic acid production in rat brain via changes in tryptophan metabolism in the periphery.

    Sekine, Airi / Fukuwatari, Tsutomu

    Neuroscience letters

    2019  Volume 701, Page(s) 14–19

    Abstract: The tryptophan metabolite, kynurenic acid (KYNA), is a preferential antagonist of the α7 nicotinic acetylcholine receptor and N-methyl-d-aspartic acid receptor at endogenous brain concentrations. Recent studies have suggested that increased brain KYNA ... ...

    Abstract The tryptophan metabolite, kynurenic acid (KYNA), is a preferential antagonist of the α7 nicotinic acetylcholine receptor and N-methyl-d-aspartic acid receptor at endogenous brain concentrations. Recent studies have suggested that increased brain KYNA levels are involved in psychiatric disorders such as schizophrenia and depression. Most of the brain kynurenine (KYN), the KYNA precursor, comes from the periphery, and the liver has a central role in the peripheral tryptophan metabolism. In this study, the effect of acute liver failure (ALF) on brain KYNA production and on the peripheral tryptophan metabolism was investigated in rats. ALF was induced by administration of the hepatotoxin, thioacetamide (TAA). Brain KYNA levels were increased by TAA-induced ALF, and these increases were consistent with KYN levels in the brain, serum and liver. These results suggest that the ALF-induced increase in serum KYN contributes to the increase in brain KYNA via elevated KYN uptake within the brain. This increase in serum KYN level can be caused by the changes in tryptophan-2,3-dioxygenase activity in the liver and the immune-related activation of indoleamine-2,3-dioxygenase in extrahepatic tissues. These findings suggest that hepatic dysfunction may contribute to neurological and psychiatric diseases associated with increased KYNA levels.
    MeSH term(s) Animals ; Kynurenic Acid/analysis ; Kynurenine/analysis ; Kynurenine/blood ; Kynurenine/metabolism ; Liver Failure, Acute/chemically induced ; Liver Failure, Acute/metabolism ; Male ; Rats ; Rats, Wistar ; Thioacetamide/toxicity
    Chemical Substances Thioacetamide (075T165X8M) ; Kynurenine (343-65-7) ; Kynurenic Acid (H030S2S85J)
    Language English
    Publishing date 2019-02-06
    Publishing country Ireland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 194929-9
    ISSN 1872-7972 ; 0304-3940
    ISSN (online) 1872-7972
    ISSN 0304-3940
    DOI 10.1016/j.neulet.2019.02.004
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Eating behaviour characteristics and dietary intake among Japanese junior high school students: A cross-sectional study.

    Sekine, Airi / Okazaki, Fumiko / Sugiyama, Hiroki / Saeki, Kae / Suzuki, Reiko

    Nutrition and health

    2022  , Page(s) 2601060221138644

    Abstract: Background: Psychological characteristics of eating behaviour may be related to dietary habits.: Aim: We investigated the association between eating behaviour characteristics and nutrition and food intake adequacy in Japanese adolescents.: Methods!# ...

    Abstract Background: Psychological characteristics of eating behaviour may be related to dietary habits.
    Aim: We investigated the association between eating behaviour characteristics and nutrition and food intake adequacy in Japanese adolescents.
    Methods: This cross-sectional survey was conducted among 136 junior high school students (boys: 90, girls: 46) at a junior high school in Tokyo, Japan. Eating behaviour was categorised into three types (emotional, external, and restrained) using scores on the Japanese version of the Dutch Eating Behaviour Questionnaire. Dietary intake was assessed using a validated, brief self-administered diet history questionnaire. Inadequate nutrient intake was determined by counting the number of nutrients not meeting the dietary reference intake (DRI) for the Japanese population. The statistical analyses included Wilcoxon signed-rank tests, Spearman's rank correlation coefficient, and multiple regression analysis using JMP ver.14 (SAS Institute Inc., Cary, NC, USA). All reported
    Results: Multiple regression analysis showed that restrained eating score was inversely associated with the number of nutrients not meeting the DRI (
    Conclusions: These results suggest that adolescents with low restrained eating scores may have less self-control over their eating behaviour and may therefore have inadequate dietary intake.
    Language English
    Publishing date 2022-11-28
    Publishing country England
    Document type Journal Article
    ZDB-ID 603215-1
    ISSN 2047-945X ; 0260-1060
    ISSN (online) 2047-945X
    ISSN 0260-1060
    DOI 10.1177/02601060221138644
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Inhibition of Large Neutral Amino Acid Transporters Suppresses Kynurenic Acid Production Via Inhibition of Kynurenine Uptake in Rodent Brain.

    Sekine, Airi / Kuroki, Yusuke / Urata, Tomomi / Mori, Noriyuki / Fukuwatari, Tsutomu

    Neurochemical research

    2016  Volume 41, Issue 9, Page(s) 2256–2266

    Abstract: The tryptophan metabolite, kynurenic acid (KYNA), is a preferential antagonist of the α7 nicotinic acetylcholine receptor and N-methyl-D-aspartic acid receptor at endogenous brain concentrations. Recent studies have suggested that increases of brain KYNA ...

    Abstract The tryptophan metabolite, kynurenic acid (KYNA), is a preferential antagonist of the α7 nicotinic acetylcholine receptor and N-methyl-D-aspartic acid receptor at endogenous brain concentrations. Recent studies have suggested that increases of brain KYNA levels are involved in psychiatric disorders such as schizophrenia and depression, and regulation of KYNA production has become a new target for treatment of these diseases. Kynurenine (KYN), the immediate precursor of KYNA, is transported into astrocytes via large neutral amino acid transporters (LATs). In the present study, the effect of LATs regulation on KYN uptake and KYNA production was investigated in vitro and in vivo using an LATs inhibitor, 2-aminobicyclo-(2,2,1)-heptane-2-carboxylic acid (BCH). In the in vitro study, cortical slices of rat brain were incubated with a physiological concentration of KYN and 3 µmol/L-3 mmol/L BCH. BCH inhibited KYNA production and KYN uptake in a dose-dependent manner, and their IC50 values were 90.7 and 97.4 µmol/L, respectively. In the in vivo study, mice were administered KYN (50 mg/kg BW) orally and BCH (200 mg/kg BW) intravenously. Administration of KYN increased brain KYN and KYNA levels compared with the mice treated with vehicle, whereas additional administration of BCH suppressed KYN-induced elevations in KYN and KYNA levels to 50 and 70 % in the brain. These results suggest that inhibition of LATs prevented the increase of KYNA production via blockade of KYN uptake in the brain in vitro and in vivo. LATs can be a target to modulate brain function by regulation of KYNA production in the brain.
    MeSH term(s) Amino Acid Transport Systems, Neutral/metabolism ; Animals ; Brain/drug effects ; Brain/metabolism ; Kynurenic Acid/metabolism ; Kynurenine/metabolism ; Kynurenine/pharmacology ; Male ; Rats, Wistar ; Schizophrenia/metabolism ; Tryptophan/metabolism ; alpha7 Nicotinic Acetylcholine Receptor/metabolism
    Chemical Substances Amino Acid Transport Systems, Neutral ; alpha7 Nicotinic Acetylcholine Receptor ; Kynurenine (343-65-7) ; Tryptophan (8DUH1N11BX) ; Kynurenic Acid (H030S2S85J)
    Language English
    Publishing date 2016-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 199335-5
    ISSN 1573-6903 ; 0364-3190
    ISSN (online) 1573-6903
    ISSN 0364-3190
    DOI 10.1007/s11064-016-1940-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Amino acids inhibit kynurenic acid formation via suppression of kynurenine uptake or kynurenic acid synthesis in rat brain in vitro.

    Sekine, Airi / Okamoto, Misaki / Kanatani, Yuka / Sano, Mitsue / Shibata, Katsumi / Fukuwatari, Tsutomu

    SpringerPlus

    2015  Volume 4, Page(s) 48

    Abstract: The tryptophan metabolite, kynurenic acid (KYNA), is a preferential antagonist of the α7 nicotinic acetylcholine receptor at endogenous brain concentrations. Recent studies have suggested that increase of brain KYNA levels is involved in psychiatric ... ...

    Abstract The tryptophan metabolite, kynurenic acid (KYNA), is a preferential antagonist of the α7 nicotinic acetylcholine receptor at endogenous brain concentrations. Recent studies have suggested that increase of brain KYNA levels is involved in psychiatric disorders such as schizophrenia and depression. KYNA-producing enzymes have broad substrate specificity for amino acids, and brain uptake of kynurenine (KYN), the immediate precursor of KYNA, is via large neutral amino acid transporters (LAT). In the present study, to find out amino acids with the potential to suppress KYNA production, we comprehensively investigated the effects of proteinogenic amino acids on KYNA formation and KYN uptake in rat brain in vitro. Cortical slices of rat brain were incubated for 2 h in Krebs-Ringer buffer containing a physiological concentration of KYN with individual amino acids. Ten out of 19 amino acids (specifically, leucine, isoleucine, phenylalanine, methionine, tyrosine, alanine, cysteine, glutamine, glutamate, and aspartate) significantly reduced KYNA formation at 1 mmol/L. These amino acids showed inhibitory effects in a dose-dependent manner, and partially inhibited KYNA production at physiological concentrations. Leucine, isoleucine, methionine, phenylalanine, and tyrosine, all LAT substrates, also reduced tissue KYN concentrations in a dose-dependent manner, with their inhibitory rates for KYN uptake significantly correlated with KYNA formation. These results suggest that five LAT substrates inhibit KYNA formation via blockade of KYN transport, while the other amino acids act via blockade of the KYNA synthesis reaction in brain. Amino acids can be a good tool to modulate brain function by manipulation of KYNA formation in the brain. This approach may be useful in the treatment and prevention of neurological and psychiatric diseases associated with increased KYNA levels.
    Language English
    Publishing date 2015-02-01
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2661116-8
    ISSN 2193-1801
    ISSN 2193-1801
    DOI 10.1186/s40064-015-0826-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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