LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 112

Search options

  1. Article: 5‐Hydroxy‐7‐methoxyflavone derivatives from Kaempferia parviflora induce skeletal muscle hypertrophy

    Yamaji, Ryoichi

    Food Science & Nutrition, 7(1):312-321

    2018  

    Abstract: Skeletal muscle plays a critical role in locomotion and energy metabolism. Maintenance or enhancement of skeletal muscle mass contributes to the improvement of mobility and prevents the development of metabolic diseases. The extracts from Kaempferia ... ...

    Abstract Skeletal muscle plays a critical role in locomotion and energy metabolism. Maintenance or enhancement of skeletal muscle mass contributes to the improvement of mobility and prevents the development of metabolic diseases. The extracts from Kaempferia parviflora rhizomes contain at least ten methoxyflavone derivatives that exhibit enhancing effects on ATP production and glucose uptake in skeletal muscle cells. In the present study, we investigated the effects of ten K. parviflora‐derived methoxyflavone derivatives (six 5,7‐dimethoxyflavone (DMF) derivatives and four 5‐hydroxy‐7‐methoxyflavone (HMF) derivatives) on skeletal muscle hypertrophy. Murine C2C12 myotubes and senescence‐accelerated mouse‐prone 1 (SAMP1) mice treated with methoxyflavones were used as experimental models to determine the effects of HMF derivatives on myotube diameter and size and muscle mass. The four HMF derivatives, but not the six DMF derivatives, increased myotube diameter. The 5‐hydroxyflavone, 7‐methoxyflavone, and 5,7‐dihydroxyflavone had no influence on myotube size, a result that differed from HMF. Dietary administration of the mixture composed of the four HMF derivatives resulted in increase in the soleus muscle size and mass in SAMP1 mice. HMF derivatives also promoted protein synthesis in myotubes, and treatment with the intracellular Ca2+ chelator BAPTA‐AM, which depletes intracellular Ca2+ levels, inhibited this promotion. Furthermore, BAPTA‐AM inhibited HMF‐promoted protein synthesis even when myotubes were incubated in Ca2+‐free medium. These results indicate that HMF derivatives induce myotube hypertrophy and that both the 5‐hydroxyl group and the 7‐methoxy group in the flavones are necessary for myotube hypertrophy. Furthermore, these results suggest that HMF‐induced protein synthesis requires intracellular Ca2+, but not extracellular Ca2+.
    Keywords 5-hydroxy-7-methoxyflavone ; Ca 2+ ; Kaempferia parviflora ; muscle hypertrophy ; senescence-accelerated mouse ; protein synthesis
    Language English
    Document type Article
    Database Repository for Life Sciences

    More links

    Kategorien

  2. Article ; Online: Functions of Nutrient-Sensing Nuclear Receptors in Health.

    Yamaji, Ryoichi

    Journal of nutritional science and vitaminology

    2022  Volume 68, Issue Supplement, Page(s) S14–S16

    Abstract: Nutrients play important roles in the regulation of physiological and pathophysiological events in higher animals. Nuclear receptors (NRs) share a common modular functional structure and constitute a transcription factor superfamily consisting of 48 ... ...

    Abstract Nutrients play important roles in the regulation of physiological and pathophysiological events in higher animals. Nuclear receptors (NRs) share a common modular functional structure and constitute a transcription factor superfamily consisting of 48 members in humans. Some NRs are activated by the binding of small lipophilic molecules such as food components including fat-soluble vitamins (vitamins A, K, and D) or lipids (phosphatidylcholine, oleoylethanolamide, or fatty acids). NRs contribute to cell growth, differentiation, or metabolic regulation. Generally, NRs bound to their ligands function as a transcription factors targeting specific DNA sequences in genes. Additionally, ligand-bound NRs mediate the activation of specific intracellular signal transduction pathways. On the other hand, some NRs are functional without binding a ligand. Information on the roles and functions of nutrient-sensing NRs in physiological or pathophysiological events not only leads to an understanding of the need for nutrients, but also contributes to the prevention and amelioration of nutrition-related diseases.
    MeSH term(s) Animals ; Humans ; Ligands ; Receptors, Cytoplasmic and Nuclear ; Nutrients ; Transcription Factors ; Vitamins
    Chemical Substances Ligands ; Receptors, Cytoplasmic and Nuclear ; Transcription Factors ; Vitamins
    Language English
    Publishing date 2022-09-23
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 191366-9
    ISSN 1881-7742 ; 0301-4800
    ISSN (online) 1881-7742
    ISSN 0301-4800
    DOI 10.3177/jnsv.68.S14
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: All-

    Kitakaze, Tomoya / Tatsumi, Rina / Yamaguchi, Mayu / Nakatsuji, Aino / Harada, Naoki / Yamaji, Ryoichi

    International journal of molecular sciences

    2023  Volume 24, Issue 10

    Abstract: All- ...

    Abstract All-
    MeSH term(s) Mice ; Animals ; Myogenin/genetics ; Myogenin/metabolism ; Tretinoin/pharmacology ; Tretinoin/metabolism ; Wnt Signaling Pathway ; Myoblasts/metabolism ; RNA, Messenger/genetics ; Cell Differentiation/genetics ; Receptors, G-Protein-Coupled/genetics ; Receptors, G-Protein-Coupled/metabolism
    Chemical Substances Myogenin ; Tretinoin (5688UTC01R) ; RNA, Messenger ; Lgr6 protein, mouse ; Receptors, G-Protein-Coupled
    Language English
    Publishing date 2023-05-20
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms24109035
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Androgen receptor suppresses β-adrenoceptor-mediated CREB activation and thermogenesis in brown adipose tissue of male mice.

    Harada, Naoki / Kubo, Keitaro / Onishi, Teruaki / Kitakaze, Tomoya / Goto, Tsuyoshi / Inui, Hiroshi / Yamaji, Ryoichi

    The Journal of biological chemistry

    2022  Volume 298, Issue 12, Page(s) 102619

    Abstract: Thermoregulation is a process by which core body temperature is maintained in mammals. Males typically have a lower body temperature than females. However, the effects of androgens, which show higher levels in males, on adrenergic receptor-mediated ... ...

    Abstract Thermoregulation is a process by which core body temperature is maintained in mammals. Males typically have a lower body temperature than females. However, the effects of androgens, which show higher levels in males, on adrenergic receptor-mediated thermogenesis remain unclear. Here, we demonstrate that androgen-androgen receptor (AR) signaling suppresses the β-adrenergic agonist-induced rise of core body temperature using castrated and AR knockout (ARKO) male mice. Furthermore, in vitro mechanistic studies show that activated AR inhibits cAMP response element (CRE)-mediated transcription by suppressing cAMP response element-binding protein (CREB) phosphorylation. The elevation of body temperature induced by the β-adrenergic agonist CL316243 was higher in ARKO and castrated mice than in the control mice. Similarly, CL316243 induced a greater increase in Uncoupling protein 1 (Ucp1) expression and CREB phosphorylation in the brown adipose tissue of ARKO mice than in that of controls. We determined that activation of AR by dihydrotestosterone suppressed β3-agonist- or forskolin-induced CRE-mediated transcription, which was prevented by AR antagonist. AR activation also suppressed CREB phosphorylation induced by forskolin. Moreover, we found AR nuclear localization, but not transcriptional activity, was necessary for the suppression of CRE-mediated transcription. Finally, modified mammalian two-hybrid and immunoprecipitation analyses suggest nuclear AR and CREB form a protein complex both in the presence and absence of dihydrotestosterone and forskolin. These results suggest androgen-AR signaling suppresses β-adrenoceptor-induced UCP1-mediated brown adipose tissue thermogenesis by suppressing CREB phosphorylation, presumably owing to a protein complex with AR and CREB. This mechanism explains sexual differences in body temperature, at least partially.
    Language English
    Publishing date 2022-10-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2997-x
    ISSN 1083-351X ; 0021-9258
    ISSN (online) 1083-351X
    ISSN 0021-9258
    DOI 10.1016/j.jbc.2022.102619
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article: Carotenoid transporter CD36 expression depends on hypoxia-inducible factor-1α in mouse soleus muscles.

    Kitakaze, Tomoya / Sugihira, Takashi / Kameyama, Hiromichi / Maruchi, Asami / Kobayashi, Yasuyuki / Harada, Naoki / Yamaji, Ryoichi

    Journal of clinical biochemistry and nutrition

    2022  Volume 71, Issue 2, Page(s) 112–121

    Abstract: Dietary β-carotene induces muscle hypertrophy and prevents muscle atrophy in red slow-twitch soleus muscles, but not in white fast-twitch extensor digitorum longus (EDL) muscles and gastrocnemius muscles. However, it remains unclear why these beneficial ... ...

    Abstract Dietary β-carotene induces muscle hypertrophy and prevents muscle atrophy in red slow-twitch soleus muscles, but not in white fast-twitch extensor digitorum longus (EDL) muscles and gastrocnemius muscles. However, it remains unclear why these beneficial effects of β-carotene are elicited in soleus muscles. To address this issue, we focused on carotenoid transporters in skeletal muscles. In mice,
    Language English
    Publishing date 2022-05-26
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 632945-7
    ISSN 1880-5086 ; 0912-0009
    ISSN (online) 1880-5086
    ISSN 0912-0009
    DOI 10.3164/jcbn.21-163
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Dietary oleamide attenuates obesity induced by housing mice in small cages.

    Kobayashi, Yasuyuki / Kubota, Mai / Sugimoto, Keiichiro / Kitakaze, Tomoya / Harada, Naoki / Yamaji, Ryoichi

    Bioscience, biotechnology, and biochemistry

    2022  Volume 86, Issue 8, Page(s) 1095–1105

    Abstract: Physical inactivity due to prolonged sedentary behavior induces obesity. Therefore, we investigated whether housing mice in small cages to mimic sedentary behavior induced obesity and whether dietary oleamide (cis-9,10-octadeceneamide) suppressed the ... ...

    Abstract Physical inactivity due to prolonged sedentary behavior induces obesity. Therefore, we investigated whether housing mice in small cages to mimic sedentary behavior induced obesity and whether dietary oleamide (cis-9,10-octadeceneamide) suppressed the induced obesity. A single oral administration of oleamide (50 mg/kg) to mice resulted in the accumulation of the exogenous oleamide in abdominal visceral fat. Next, mice were housed in small cages and oleamide (50 mg/kg/d) was orally administered for 12 weeks. Housing mice in small cages impaired glucose tolerance and increased food efficiency. It also increased body weight and abdominal fat mass. Dietary oleamide improved the impairment and inhibited their increase in mice housed in small cages. Furthermore, dietary oleamide suppressed the mRNA expression of inflammation-related factors in the abdominal fat of mice housed in small cages. Hence, these results indicate that although housing mice in small cages induces obesity and increases abdominal fat mass, dietary oleamide suppresses the obesity.
    MeSH term(s) Animals ; Diet, High-Fat/adverse effects ; Housing ; Mice ; Mice, Inbred C57BL ; Obesity/chemically induced ; Obesity/drug therapy ; Oleic Acids/pharmacology
    Chemical Substances Oleic Acids ; oleylamide (7L25QK8BWO)
    Language English
    Publishing date 2022-05-28
    Publishing country England
    Document type Journal Article
    ZDB-ID 1106450-x
    ISSN 1347-6947 ; 0916-8451
    ISSN (online) 1347-6947
    ISSN 0916-8451
    DOI 10.1093/bbb/zbac082
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Mogrol stimulates G-protein-coupled bile acid receptor 1 (GPBAR1/TGR5) and insulin secretion from pancreatic β-cells and alleviates hyperglycemia in mice.

    Tanaka, Chisato / Harada, Naoki / Teraoka, Yoshiaki / Urushizaki, Hiroki / Shinmori, Yoh / Onishi, Teruaki / Yotsumoto, Yusuke / Ito, Yuta / Kitakaze, Tomoya / Inui, Takashi / Murata, Yuji / Inui, Hiroshi / Yamaji, Ryoichi

    Scientific reports

    2024  Volume 14, Issue 1, Page(s) 3244

    Abstract: Target identification is a crucial step in elucidating the mechanisms by which functional food components exert their functions. Here, we identified the G-protein-coupled bile acid receptor 1 (GPBAR1, also known as TGR5) as a target of the triterpenoid ... ...

    Abstract Target identification is a crucial step in elucidating the mechanisms by which functional food components exert their functions. Here, we identified the G-protein-coupled bile acid receptor 1 (GPBAR1, also known as TGR5) as a target of the triterpenoid mogrol, a class of aglycone mogroside derivative from Siraitia grosvenorii. Mogrol, but not mogrosides, activated cAMP-response element-mediated transcription in a TGR5-dependent manner. Additionally, mogrol selectively activated TGR5 but not the other bile acid-responsive receptors (i.e., farnesoid X receptor, vitamin D receptor, or muscarinic acetylcholine receptor M3). Several amino acids in TGR5 (L71A
    MeSH term(s) Animals ; Mice ; Bile Acids and Salts ; Diabetes Mellitus, Experimental/metabolism ; GTP-Binding Proteins/metabolism ; Hyperglycemia/drug therapy ; Insulin/metabolism ; Insulin Secretion ; Lanosterol/analogs & derivatives ; Phenanthrenes ; Receptors, G-Protein-Coupled/genetics ; Receptors, G-Protein-Coupled/metabolism
    Chemical Substances Bile Acids and Salts ; GTP-Binding Proteins (EC 3.6.1.-) ; Insulin ; Lanosterol (1J05Z83K3M) ; mogrol ; Phenanthrenes ; Receptors, G-Protein-Coupled ; Gpbar1 protein, mouse
    Language English
    Publishing date 2024-02-08
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-024-53380-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Stereoselective effects of lactate enantiomers on the enhancement of 3T3-L1 adipocyte differentiation.

    Harada, Naoki / Hirano, Ito / Inui, Hiroshi / Yamaji, Ryoichi

    Biochemical and biophysical research communications

    2018  Volume 498, Issue 1, Page(s) 105–110

    Abstract: Lactate contains a chiral carbon and thus has two optical isomers-d-lactate and l-lactate. l-Lactate is the predominant form that is produced by the body and can be delivered to the organs. On the other hand, gut microbiota produce both isomers, which ... ...

    Abstract Lactate contains a chiral carbon and thus has two optical isomers-d-lactate and l-lactate. l-Lactate is the predominant form that is produced by the body and can be delivered to the organs. On the other hand, gut microbiota produce both isomers, which can then flow into the body. Although both d-lactate and l-lactate can contribute to energy metabolism, their potential roles in adipocyte differentiation remain to be elucidated. Here, we investigated the effects of l-lactate and d-lactate on the differentiation of 3T3-L1 preadipocytes. Both lactate enantiomers were demonstrated to enhance triglyceride accumulation by stimulating the early phase of adipocyte differentiation. Notably, d-lactate was more potent than l-lactate in inducing triglyceride accumulation. The degree of triglyceride accumulation induced by l-lactate was similar to that induced by pyruvate. d-Lactate was more potent than l-lactate in increasing the activity of glycerol-3-phosphate dehydrogenase. Both lactate enantiomers did not affect cell viability. Moreover, both enantiomers upregulated the expression of peroxisome proliferator-activated receptor γ, CCAAT/enhancer-binding protein (C/EBP) α, sterol regulatory element-binding protein-1c, and fatty acid synthase, with d-lactate exerting stronger effects than l-lactate. By contrast, lactate did not influence the expression of C/EBPβ and C/EBPδ. d-Lactate significantly increased and l-lactate tended to increase p38 MAPK phosphorylation, and the p38 MAPK inhibitor SB203580 inhibited the stimulation of adipocyte differentiation by d-lactate and l-lactate. These findings showed that both lactate enantiomers stimulate preadipocyte differentiation, with d-lactate showing more potent effects than l-lactate. In addition, our study demonstrated that d-lactate and l-lactate exert different effects on physiological events.
    MeSH term(s) 3T3-L1 Cells ; Adipocytes/cytology ; Adipocytes/drug effects ; Adipogenesis/drug effects ; Adipogenesis/genetics ; Animals ; Cell Differentiation/drug effects ; Cell Differentiation/genetics ; Gene Expression Regulation/drug effects ; Lactic Acid/chemistry ; Lactic Acid/pharmacology ; Mice ; Stereoisomerism
    Chemical Substances Lactic Acid (33X04XA5AT)
    Language English
    Publishing date 2018--25
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 205723-2
    ISSN 1090-2104 ; 0006-291X ; 0006-291X
    ISSN (online) 1090-2104 ; 0006-291X
    ISSN 0006-291X
    DOI 10.1016/j.bbrc.2018.02.198
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article: β-Cryptoxanthin Improves p62 Accumulation and Muscle Atrophy in the Soleus Muscle of Senescence-Accelerated Mouse-Prone 1 Mice

    Noguchi, Mari / Kitakaze, Tomoya / Kobayashi, Yasuyuki / Mukai, Katsuyuki / Harada, Naoki / Yamaji, Ryoichi

    Nutrients. 2020 July 22, v. 12, no. 8

    2020  

    Abstract: We investigated the effects of β-cryptoxanthin on skeletal muscle atrophy in senescence-accelerated mouse-prone 1 (SAMP1) mice. For 15 weeks, SAMP1 mice were intragastrically administered vehicle or β-cryptoxanthin. At 35 weeks of age, the skeletal ... ...

    Abstract We investigated the effects of β-cryptoxanthin on skeletal muscle atrophy in senescence-accelerated mouse-prone 1 (SAMP1) mice. For 15 weeks, SAMP1 mice were intragastrically administered vehicle or β-cryptoxanthin. At 35 weeks of age, the skeletal muscle mass in SAMP1 mice was reduced compared with that in control senescence-accelerated mouse-resistant 1 (SAMR1) mice. β-cryptoxanthin increased muscle mass with an increase in the size of muscle fibers in the soleus muscle of SAMP1 mice. The expressions of autophagy-related factors such as beclin-1, p62, LC3-I, and LC3-II were increased in the soleus muscle of SAMP1 mice; however, β-cryptoxanthin administration inhibited this increase. Unlike in SAMR1 mice, p62 was punctately distributed throughout the cytosol in the soleus muscle fibers of SAMP1 mice; however, β-cryptoxanthin inhibited this punctate distribution. The cross-sectional area of p62-positive fiber was smaller than that of p62-negative fiber, and the ratio of p62-positive fibers to p62-negative fibers was increased in SAMP1 mice. β-cryptoxanthin decreased this ratio in SAMP1 mice. Furthermore, β-cryptoxanthin decreased the autophagy-related factor expression in murine C2C12 myotube. The autophagy inhibitor bafilomycin A1, but not the proteasome inhibitor MG132, inhibited the β-cryptoxanthin-induced decrease in p62 and LC3-II expressions. These results indicate that β-cryptoxanthin inhibits the p62 accumulation in fibers and improves muscle atrophy in the soleus muscle of SAMP1 mice.
    Keywords age ; area ; autophagy ; cytosol ; mice ; muscles ; muscular atrophy ; myotubes ; proteasome inhibitors ; skeletal muscle
    Language English
    Dates of publication 2020-0722
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    Note NAL-light
    ZDB-ID 2518386-2
    ISSN 2072-6643
    ISSN 2072-6643
    DOI 10.3390/nu12082180
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  10. Article: Oleamide rescues tibialis anterior muscle atrophy of mice housed in small cages

    Kobayashi, Yasuyuki / Watanabe, Natsumi / Kitakaze, Tomoya / Sugimoto, Keiichiro / Izawa, Takeshi / Kai, Kenji / Harada, Naoki / Yamaji, Ryoichi

    British journal of nutrition. 2021 Aug. 28, v. 126, no. 4

    2021  

    Abstract: Skeletal muscle atrophy causes decreased physical activity and increased risk of metabolic diseases. We investigated the effects of oleamide (cis-9,10-octadecanamide) treatment on skeletal muscle health. The plasma concentration of endogenous oleamide ... ...

    Abstract Skeletal muscle atrophy causes decreased physical activity and increased risk of metabolic diseases. We investigated the effects of oleamide (cis-9,10-octadecanamide) treatment on skeletal muscle health. The plasma concentration of endogenous oleamide was approximately 30 nm in male ddY mice under normal physiological conditions. When the stable isotope-labelled oleamide was orally administered to male ddY mice (50 mg/kg), the plasma concentration of exogenous oleamide reached approximately 170 nm after 1 h. Male ddY mice were housed in small cages (one-sixth of normal size) to enforce sedentary behaviour and orally administered oleamide (50 mg/kg per d) for 4 weeks. Housing in small cages decreased tibialis anterior (TA) muscle mass and the cross-sectional area of the myofibres in TA muscle. Dietary oleamide alleviated the decreases in TA muscle and resulted in plasma oleamide concentration of approximately 120 nm in mice housed in small cages. Housing in small cages had no influence on the phosphorylation levels of Akt serine/threonine kinase (Akt), mechanistic target of rapamycin (mTOR) and ribosomal protein S6 kinase (p70S6K) in TA muscle; nevertheless, oleamide increased the phosphorylation levels of the proteins. Housing in small cages increased the expression of microtubule-associated protein 1 light chain 3 (LC3)-II and sequestosome 1 (p62), but not LC3-I, in TA muscle, and oleamide reduced LC3-I, LC3-II and p62 expression levels. In C2C12 myotubes, oleamide increased myotube diameter at ≥100 nm. Furthermore, the mTOR inhibitor, Torin 1, suppressed oleamide-induced increases in myotube diameter and protein synthesis. These results indicate that dietary oleamide rescued TA muscle atrophy in mice housed in small cages, possibly by activating the phosphoinositide 3-kinase/Akt/mTOR signalling pathway and restoring autophagy flux.
    Keywords autophagy ; isotope labeling ; males ; muscles ; muscular atrophy ; myotubes ; non-specific serine/threonine protein kinase ; nutrition ; phosphorylation ; physical activity ; protein synthesis ; rapamycin ; ribosomal proteins ; risk ; sedentary lifestyle ; serine ; skeletal muscle ; threonine
    Language English
    Dates of publication 2021-0828
    Size p. 481-491.
    Publishing place Cambridge University Press
    Document type Article
    ZDB-ID 280396-3
    ISSN 1475-2662 ; 0007-1145
    ISSN (online) 1475-2662
    ISSN 0007-1145
    DOI 10.1017/S0007114520004304
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

To top