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Momozane T, Kawamura T, Itoh Y, Sanosaka M, Sasaki T, Kanzaki R, Ose N, Funaki S, Shintani Y, Minami M, Okumura M, Takemori H. Carnosol suppresses interleukin-6 production in mouse lungs injured by ischemia–reperfusion operation and in RAW264.7 macrophages treated with lipopolysaccharide. Biochem Cell Biol 2018; 96:769-776. [DOI: 10.1139/bcb-2017-0339] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Carnosol is a naturally occurring herbal compound, known for its antioxidative properties. We previously found that carnosol protected mouse lungs from ischemia–reperfusion injury in ex vivo cultures. To elucidate the molecular mechanisms underpinning carnosol-mediated lung protection, we analyzed modes of interleukin-6 (IL-6) gene expression, which is associated with lung ischemia–reperfusion injury. Microarray analysis of mouse lungs suggested that IL-6 mRNA levels were elevated in the mouse lungs subjected to clamp-reperfusion, which was associated with elevated levels of other inflammatory modulators, such as activating transcription factor 3 (ATF3). Carnosol pretreatment lowered the IL-6 protein levels in mouse lung homogenates prepared after the clamp-reperfusion. On the other hand, the ATF3 gene expression was negatively correlated with that of IL-6 in RAW264.7 cells. IL-6 mRNA levels and gene promoter activities were suppressed by carnosol in RAW264.7 cells, but rescued by ATF3 knockdown. When RAW264.7 cells were subjected to hypoxia–reoxygenation, carnosol treatment lowered oxygen consumption after reoxygenation, which was coupled with a correlation with a transient production of mitochondrial reactive oxygen species and following ATF3 gene expression. These results suggest that carnosol treatment could be a new strategy for protecting lungs from ischemia–reperfusion injury by modulating the ATF3–IL-6 axis.
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Affiliation(s)
- Toru Momozane
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
- Laboratory of Cell Signaling & Metabolic Disease, National Institute of Biomedical Innovation, 7-6-8, Asagi-Saito, Ibaraki Osaka, 567-0085, Japan
| | - Tomohiro Kawamura
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
- Laboratory of Cell Signaling & Metabolic Disease, National Institute of Biomedical Innovation, 7-6-8, Asagi-Saito, Ibaraki Osaka, 567-0085, Japan
| | - Yumi Itoh
- Laboratory of Cell Signaling & Metabolic Disease, National Institute of Biomedical Innovation, 7-6-8, Asagi-Saito, Ibaraki Osaka, 567-0085, Japan
| | - Masato Sanosaka
- Laboratory of Cell Signaling & Metabolic Disease, National Institute of Biomedical Innovation, 7-6-8, Asagi-Saito, Ibaraki Osaka, 567-0085, Japan
| | - Tsutomu Sasaki
- Department of Neurology, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Ryu Kanzaki
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Naoko Ose
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Soichiro Funaki
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yasushi Shintani
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Masato Minami
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Meinoshin Okumura
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Hiroshi Takemori
- Laboratory of Cell Signaling & Metabolic Disease, National Institute of Biomedical Innovation, 7-6-8, Asagi-Saito, Ibaraki Osaka, 567-0085, Japan
- Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1, Yanagido, Gifu, 501-1193, Japan
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Kawamura T, Momozane T, Sanosaka M, Sugimura K, Iida O, Fuchino H, Funaki S, Shintani Y, Inoue M, Minami M, Kawahara N, Takemori H, Okumura M. Carnosol Is a Potent Lung Protective Agent: Experimental Study on Mice. Transplant Proc 2015; 47:1657-61. [DOI: 10.1016/j.transproceed.2015.05.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2015] [Revised: 05/11/2015] [Accepted: 05/14/2015] [Indexed: 12/15/2022]
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Itoh Y, Sanosaka M, Fuchino H, Yahara Y, Kumagai A, Takemoto D, Kagawa M, Doi J, Ohta M, Tsumaki N, Kawahara N, Takemori H. Salt-inducible Kinase 3 Signaling Is Important for the Gluconeogenic Programs in Mouse Hepatocytes. J Biol Chem 2015; 290:17879-17893. [PMID: 26048985 DOI: 10.1074/jbc.m115.640821] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Indexed: 01/24/2023] Open
Abstract
Salt-inducible kinases (SIKs), members of the 5'-AMP-activated protein kinase (AMPK) family, are proposed to be important suppressors of gluconeogenic programs in the liver via the phosphorylation-dependent inactivation of the CREB-specific coactivator CRTC2. Although a dramatic phenotype for glucose metabolism has been found in SIK3-KO mice, additional complex phenotypes, dysregulation of bile acids, cholesterol, and fat homeostasis can render it difficult to discuss the hepatic functions of SIK3. The aim of this study was to examine the cell autonomous actions of SIK3 in hepatocytes. To eliminate systemic effects, we prepared primary hepatocytes and screened the small compounds suppressing SIK3 signaling cascades. SIK3-KO primary hepatocytes produced glucose more quickly after treatment with the cAMP agonist forskolin than the WT hepatocytes, which was accompanied by enhanced gluconeogenic gene expression and CRTC2 dephosphorylation. Reporter-based screening identified pterosin B as a SIK3 signaling-specific inhibitor. Pterosin B suppressed SIK3 downstream cascades by up-regulating the phosphorylation levels in the SIK3 C-terminal regulatory domain. When pterosin B promoted glucose production by up-regulating gluconeogenic gene expression in mouse hepatoma AML-12 cells, it decreased the glycogen content and stimulated an association between the glycogen phosphorylase kinase gamma subunit (PHKG2) and SIK3. PHKG2 phosphorylated the peptides with sequences of the C-terminal domain of SIK3. Here we found that the levels of active AMPK were higher both in the SIK3-KO hepatocytes and in pterosin B-treated AML-12 cells than in their controls. These results suggest that SIK3, rather than SIK1, SIK2, or AMPKs, acts as the predominant suppressor in gluconeogenic gene expression in the hepatocytes.
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Affiliation(s)
- Yumi Itoh
- Laboratory of Cell Signaling and Metabolic Disease, National Institute of Biomedical Innovation, Osaka, 567-0085, Japan
| | - Masato Sanosaka
- Laboratory of Cell Signaling and Metabolic Disease, National Institute of Biomedical Innovation, Osaka, 567-0085, Japan
| | - Hiroyuki Fuchino
- Research Center for Medicinal Plant Resources, Tsukuba Division, Ibaraki, 305-0843, Japan
| | - Yasuhito Yahara
- Department of Cell Growth and Differentiation, Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Ayako Kumagai
- Laboratory of Cell Signaling and Metabolic Disease, National Institute of Biomedical Innovation, Osaka, 567-0085, Japan
| | - Daisaku Takemoto
- Laboratory of Cell Signaling and Metabolic Disease, National Institute of Biomedical Innovation, Osaka, 567-0085, Japan; Department of Life Science and Biotechnology, Kansai University, Osaka 564-8680, Japan
| | - Mai Kagawa
- Laboratory of Cell Signaling and Metabolic Disease, National Institute of Biomedical Innovation, Osaka, 567-0085, Japan
| | - Junko Doi
- Department of Food and Nutrition, Senri Kinran University, Osaka, 565-0873 Japan
| | - Miho Ohta
- Department of Nutrition and Health, Faculty of Human Development, Soai University, Osaka, 559-0033, Japan
| | - Noriyuki Tsumaki
- Department of Cell Growth and Differentiation, Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Nobuo Kawahara
- Research Center for Medicinal Plant Resources, Tsukuba Division, Ibaraki, 305-0843, Japan
| | - Hiroshi Takemori
- Laboratory of Cell Signaling and Metabolic Disease, National Institute of Biomedical Innovation, Osaka, 567-0085, Japan.
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Sanosaka M, Fujimoto M, Ohkawara T, Nagatake T, Itoh Y, Kagawa M, Kumagai A, Fuchino H, Kunisawa J, Naka T, Takemori H. Salt-inducible kinase 3 deficiency exacerbates lipopolysaccharide-induced endotoxin shock accompanied by increased levels of pro-inflammatory molecules in mice. Immunology 2015; 145:268-78. [PMID: 25619259 PMCID: PMC4427391 DOI: 10.1111/imm.12445] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 01/14/2015] [Accepted: 01/20/2015] [Indexed: 12/16/2022] Open
Abstract
Macrophages play important roles in the innate immune system during infection and systemic inflammation. When bacterial lipopolysaccharide (LPS) binds to Toll-like receptor 4 on macrophages, several signalling cascades co-operatively up-regulate gene expression of inflammatory molecules. The present study aimed to examine whether salt-inducible kinase [SIK, a member of the AMP-activated protein kinase (AMPK) family] could contribute to the regulation of immune signal not only in cultured macrophages, but also in vivo. LPS up-regulated SIK3 expression in murine RAW264.7 macrophages and exogenously over-expressed SIK3 negatively regulated the expression of inflammatory molecules [interleukin-6 (IL-6), nitric oxide (NO) and IL-12p40] in RAW264.7 macrophages. Conversely, these inflammatory molecule levels were up-regulated in SIK3-deficient thioglycollate-elicited peritoneal macrophages (TEPM), despite no impairment of the classical signalling cascades. Forced expression of SIK3 in SIK3-deficient TEPM suppressed the levels of the above-mentioned inflammatory molecules. LPS injection (10 mg/kg) led to the death of all SIK3-knockout (KO) mice within 48 hr after treatment, whereas only one mouse died in the SIK1-KO (n = 8), SIK2-KO (n = 9) and wild-type (n = 8 or 9) groups. In addition, SIK3-KO bone marrow transplantation increased LPS sensitivity of the recipient wild-type mice, which was accompanied by an increased level of circulating IL-6. These results suggest that SIK3 is a unique negative regulator that suppresses inflammatory molecule gene expression in LPS-stimulated macrophages.
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Affiliation(s)
- Masato Sanosaka
- Laboratory of Cell Signalling and Metabolic Disease, National Institute of Biomedical InnovationIbaraki, Osaka, Japan
| | - Minoru Fujimoto
- Laboratory of Immune Signalling, National Institute of Biomedical InnovationIbaraki, Osaka, Japan
| | - Tomoharu Ohkawara
- Laboratory of Immune Signalling, National Institute of Biomedical InnovationIbaraki, Osaka, Japan
| | - Takahiro Nagatake
- Laboratory of Vaccine Materials, National Institute of Biomedical InnovationIbaraki, Osaka, Japan
| | - Yumi Itoh
- Laboratory of Cell Signalling and Metabolic Disease, National Institute of Biomedical InnovationIbaraki, Osaka, Japan
| | - Mai Kagawa
- Laboratory of Cell Signalling and Metabolic Disease, National Institute of Biomedical InnovationIbaraki, Osaka, Japan
| | - Ayako Kumagai
- Laboratory of Cell Signalling and Metabolic Disease, National Institute of Biomedical InnovationIbaraki, Osaka, Japan
| | - Hiroyuki Fuchino
- Research Centre for Medicinal Plant Resources, National Institute of Biomedical InnovationTsukuba, Ibaraki, Japan
| | - Jun Kunisawa
- Laboratory of Vaccine Materials, National Institute of Biomedical InnovationIbaraki, Osaka, Japan
| | - Tetsuji Naka
- Laboratory of Immune Signalling, National Institute of Biomedical InnovationIbaraki, Osaka, Japan
| | - Hiroshi Takemori
- Laboratory of Cell Signalling and Metabolic Disease, National Institute of Biomedical InnovationIbaraki, Osaka, Japan
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Uebi T, Itoh Y, Hatano O, Kumagai A, Sanosaka M, Sasaki T, Sasagawa S, Doi J, Tatsumi K, Mitamura K, Morii E, Aozasa K, Kawamura T, Okumura M, Nakae J, Takikawa H, Fukusato T, Koura M, Nish M, Hamsten A, Silveira A, Bertorello AM, Kitagawa K, Nagaoka Y, Kawahara H, Tomonaga T, Naka T, Ikegawa S, Tsumaki N, Matsuda J, Takemori H. Involvement of SIK3 in glucose and lipid homeostasis in mice. PLoS One 2012; 7:e37803. [PMID: 22662228 PMCID: PMC3360605 DOI: 10.1371/journal.pone.0037803] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Accepted: 04/24/2012] [Indexed: 01/20/2023] Open
Abstract
Salt-inducible kinase 3 (SIK3), an AMP-activated protein kinase-related kinase, is induced in the murine liver after the consumption of a diet rich in fat, sucrose, and cholesterol. To examine whether SIK3 can modulate glucose and lipid metabolism in the liver, we analyzed phenotypes of SIK3-deficent mice. Sik3(-/-) mice have a malnourished the phenotype (i.e., lipodystrophy, hypolipidemia, hypoglycemia, and hyper-insulin sensitivity) accompanied by cholestasis and cholelithiasis. The hypoglycemic and hyper-insulin-sensitive phenotypes may be due to reduced energy storage, which is represented by the low expression levels of mRNA for components of the fatty acid synthesis pathways in the liver. The biliary disorders in Sik3(-/-) mice are associated with the dysregulation of gene expression programs that respond to nutritional stresses and are probably regulated by nuclear receptors. Retinoic acid plays a role in cholesterol and bile acid homeostasis, wheras ALDH1a which produces retinoic acid, is expressed at low levels in Sik3(-/-) mice. Lipid metabolism disorders in Sik3(-/-) mice are ameliorated by the treatment with 9-cis-retinoic acid. In conclusion, SIK3 is a novel energy regulator that modulates cholesterol and bile acid metabolism by coupling with retinoid metabolism, and may alter the size of energy storage in mice.
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Affiliation(s)
- Tatsuya Uebi
- Laboratory of Cell Signaling and Metabolic Disease, National Institute of Biomedical Innovation, Ibaraki, Osaka, Japan
| | - Yumi Itoh
- Laboratory of Cell Signaling and Metabolic Disease, National Institute of Biomedical Innovation, Ibaraki, Osaka, Japan
| | - Osamu Hatano
- Department of Anatomy, Nara Medical University, Nara, Japan
| | - Ayako Kumagai
- Laboratory of Cell Signaling and Metabolic Disease, National Institute of Biomedical Innovation, Ibaraki, Osaka, Japan
- Department of Life Science and Biotechnology, Kansai University, Suita, Osaka, Japan
| | - Masato Sanosaka
- Laboratory of Cell Signaling and Metabolic Disease, National Institute of Biomedical Innovation, Ibaraki, Osaka, Japan
| | - Tsutomu Sasaki
- Department of Neurology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Satoru Sasagawa
- Department of Bone and Cartilage Biology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Junko Doi
- Food and Nutrition, Senri Kinran University, Osaka, Japan
| | - Keita Tatsumi
- Department of Laboratory Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Kuniko Mitamura
- Faculty of Pharmaceutical Sciences, Kinki University, Osaka, Japan
| | - Eiichi Morii
- Department of Pathology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Katsuyuki Aozasa
- Department of Pathology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Tomohiro Kawamura
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Meinoshin Okumura
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Jun Nakae
- Frontier Medicine on Metabolic Syndrome, Keio University School of Medicine, Tokyo, Japan
| | - Hajime Takikawa
- Department of Medicine, Teikyo University School of Medicine, Tokyo, Japan
| | - Toshio Fukusato
- Department of Pathology, Teikyo University School of Medicine, Tokyo, Japan
| | - Minako Koura
- Animal Models for Human Diseases, National Institute of Biomedical Innovation, Ibaraki, Osaka, Japan
| | - Mayumi Nish
- Department of Anatomy, Nara Medical University, Nara, Japan
| | - Anders Hamsten
- Cardiovascular Genetics and Genomics, Atherosclerosis Research Unit, Karolinska Institutet, CMM, Karolinska University Hospital-Solna, Stockholm, Sweden
| | - Angela Silveira
- Cardiovascular Genetics and Genomics, Atherosclerosis Research Unit, Karolinska Institutet, CMM, Karolinska University Hospital-Solna, Stockholm, Sweden
| | - Alejandro M. Bertorello
- Membrane Signaling Networks, Atherosclerosis Research Unit, Karolinska Institutet, CMM, Karolinska University Hospital-Solna, Stockholm, Sweden
| | - Kazuo Kitagawa
- Department of Neurology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yasuo Nagaoka
- Department of Life Science and Biotechnology, Kansai University, Suita, Osaka, Japan
| | - Hidehisa Kawahara
- Department of Life Science and Biotechnology, Kansai University, Suita, Osaka, Japan
| | - Takeshi Tomonaga
- Laboratory of Proteome Research, National Institute of Biomedical Innovation, Ibaraki, Osaka, Japan
| | - Tetsuji Naka
- Laboratory for Immune Signal, National Institute of Biomedical Innovation, Ibaraki, Osaka, Japan
| | - Shigeo Ikegawa
- Faculty of Pharmaceutical Sciences, Kinki University, Osaka, Japan
| | - Noriyuki Tsumaki
- Department of Bone and Cartilage Biology, Osaka University Graduate School of Medicine, Osaka, Japan
- Department of Cell Growth and Differentiation, Center for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
| | - Junichiro Matsuda
- Animal Models for Human Diseases, National Institute of Biomedical Innovation, Ibaraki, Osaka, Japan
| | - Hiroshi Takemori
- Laboratory of Cell Signaling and Metabolic Disease, National Institute of Biomedical Innovation, Ibaraki, Osaka, Japan
- * E-mail:
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Ito Y, Uebi T, Kumagai A, Sanosaka M, Takemori H. SIK3 is a new regulator of lipid homeostasis in the mouse liver. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.714.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yumi Ito
- Laboratory of Cell Signaling and Metabolic DiseaseNational Institute of Biomedical InnovationIbarakiJapan
| | - Tatsuya Uebi
- Laboratory of Cell Signaling and Metabolic DiseaseNational Institute of Biomedical InnovationIbarakiJapan
| | - Ayako Kumagai
- Laboratory of Cell Signaling and Metabolic DiseaseNational Institute of Biomedical InnovationIbarakiJapan
| | - Masato Sanosaka
- Laboratory of Cell Signaling and Metabolic DiseaseNational Institute of Biomedical InnovationIbarakiJapan
| | - Hiroshi Takemori
- Laboratory of Cell Signaling and Metabolic DiseaseNational Institute of Biomedical InnovationIbarakiJapan
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Liu L, Sanosaka M, Lei S, Bestwick ML, Frey JH, Surovtseva YV, Shadel GS, Cooper MP. LRP130 protein remodels mitochondria and stimulates fatty acid oxidation. J Biol Chem 2011; 286:41253-41264. [PMID: 21971050 PMCID: PMC3308838 DOI: 10.1074/jbc.m111.276121] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2011] [Revised: 09/21/2011] [Indexed: 11/06/2022] Open
Abstract
Impaired oxidative phosphorylation (OXPHOS) is implicated in several metabolic disorders. Even though mitochondrial DNA encodes several subunits critical for OXPHOS, the metabolic consequence of activating mitochondrial transcription remains unclear. We show here that LRP130, a protein involved in Leigh syndrome, increases hepatic β-fatty acid oxidation. Using convergent genetic and biochemical approaches, we demonstrate LRP130 complexes with the mitochondrial RNA polymerase to activate mitochondrial transcription. Activation of mitochondrial transcription is associated with increased OXPHOS activity, increased supercomplexes, and denser cristae, independent of mitochondrial biogenesis. Consistent with increased oxidative phosphorylation, ATP levels are increased in both cells and mouse liver, whereas coupled respiration is increased in cells. We propose activation of mitochondrial transcription remodels mitochondria and enhances oxidative metabolism.
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Affiliation(s)
- Lijun Liu
- Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts 01605
| | - Masato Sanosaka
- Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts 01605
| | - Shi Lei
- Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts 01605
| | - Megan L Bestwick
- Departments of Pathology and Genetics, Yale University School of Medicine, New Haven, Connecticut 06520
| | - Joseph H Frey
- Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts 01605
| | - Yulia V Surovtseva
- Departments of Pathology and Genetics, Yale University School of Medicine, New Haven, Connecticut 06520
| | - Gerald S Shadel
- Departments of Pathology and Genetics, Yale University School of Medicine, New Haven, Connecticut 06520
| | - Marcus P Cooper
- Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts 01605.
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Yonezawa T, Sanosaka M, Haga S, kobayashi Y, Katoh K, Obara Y. Regulation of uncoupling protein 2 expression by long-chain fatty acids and hormones in bovine mammary epithelial cells. Biochem Biophys Res Commun 2008; 375:280-5. [DOI: 10.1016/j.bbrc.2008.08.021] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2008] [Accepted: 08/07/2008] [Indexed: 11/30/2022]
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Sanosaka M, Minashima T, Suzuki K, Watanabe K, Ohwada S, Hagino A, Rose MT, Yamaguchi T, Aso H. A combination of octanoate and oleate promotes in vitro differentiation of porcine intramuscular adipocytes. Comp Biochem Physiol B Biochem Mol Biol 2007; 149:285-92. [PMID: 17977041 DOI: 10.1016/j.cbpb.2007.09.019] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2007] [Revised: 09/22/2007] [Accepted: 09/27/2007] [Indexed: 12/11/2022]
Abstract
To understand the relationship between intramuscular adipogenesis in the pig and the supply fatty acids, we established a clonal porcine intramuscular preadipocyte (PIP) line from the marbling muscle tissue of female Duroc pig. Confluent PIP cells exhibited a fibroblastic appearance. Their adipogenic ability was investigated using confluent PIP cells after exchanging growth medium for adipogenic medium containing 50 ng/mL insulin, 0.25 microM dexamethasone, 2 mM octanoate, and 200 microM oleate. Appropriate concentrations of octanoate and oleate for the induction of adipogenesis were determined from the ability of cells to accumulate lipid and the toxicity of fatty acids. When cells were cultured in differentiation medium for 8 days, large numbers of lipid droplets were observed in differentiated PIP cells, and their cytosolic TG content increased in a time-dependent manner. While oleate only induced the expression of PPARgamma mRNA, but not that of C/EBPalpha, octanoate significantly induced the expression of both PPARgamma and C/EBPalpha mRNA. Octanoate and oleate accelerated the inducing effect of insulin and dexamethasone on the expression of aP2 mRNA. These results indicate that a combination of octanoate and oleate synergistically induced PIP adipogenesis, and that the stimulation of octanoate was essential to the trigger for the adipogenesis in PIP cells.
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Affiliation(s)
- Masato Sanosaka
- Cellular Biology Laboratory, Graduate School of Agricultural Science, Tohoku University, Tsutsumidori-amamiyamachi 1-1, Aoba-ku, Sendai, Japan
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Yonezawa T, Yonekura S, Sanosaka M, Hagino A, Katoh K, Obara Y. Octanoate stimulates cytosolic triacylglycerol accumulation and CD36 mRNA expression but inhibits Acetyl coenzyme A carboxylase activity in primary cultured bovine mammary epithelial cells. J DAIRY RES 2004; 71:398-404. [PMID: 15605705 DOI: 10.1017/s0022029904000408] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Mammary epithelial cells, which express and secrete leptin into milk, accumulate triacylglycerol (TAG). We examined effects on the accumulation of cytosolic TAG of addition of short- (acetate and butyrate) or medium- (octanoate) chain fatty acids to the medium bathing bovine mammary epithelial cells (bMEC). Octanoate stimulated the accumulation of TAG in a concentration-dependent manner from 1 to 10 mM and increased lipid droplet formation and mRNA expression of CD36 (a fatty acid translocase). Additionally, expression of a peroxisome proliferator activated receptor (PPAR) γ 2 protein that is a lipid-activated transcription factor, was increased by the addition of acetate or octanoate. However, leptin mRNA expression was significantly reduced by addition of acetate or butyrate. Both short- and medium-chain fatty acids inhibited acetyl coenzyme A carboxylase (ACC) activities, which is pivotal in lipid synthesis, but elevated expression of uncoupling protein 2 (UCP2) mRNA, which is important in energy expenditure. These results suggest that octanoate induces cytosolic TAG accumulation and the formation of lipid droplets, and that acetate and butyrate inhibit leptin expression and lipid synthesis in bMEC.
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Affiliation(s)
- Tomo Yonezawa
- Department of Animal Physiology, Graduate School of Agricultural Science, Tohoku University, Amamiyamachi, Sendai 981-8555, Japan.
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Aso H, Tahara K, Yamasaki T, Rose M, Kido T, Minashima T, Miyazawa K, Hayashi S, Sanosaka M, Watanabe K, Ohwada S, Yamaguchi T. The profile of gene expression during bovine
adipogenesis: Cloning and expression of type XII
collagen isoforms. J Anim Feed Sci 2004. [DOI: 10.22358/jafs/73939/2004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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