1
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Lima IS, Silveira MA, Pavoni J, Guidelli JE, Garrido ECS, Baffa O. Assessment of dosimetric sensitivity enhancement of xylenol orange Fricke gel by AuNPs: optical and MR imaging investigation. Phys Med Biol 2023; 68:225011. [PMID: 37852274 DOI: 10.1088/1361-6560/ad04a9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 06/22/2023] [Accepted: 10/18/2023] [Indexed: 10/20/2023]
Abstract
Metallic nanoparticles, such as gold (Au, Z = 79) and silver (Ag, Z = 47) nanoparticles (AuNPs and AgNPs, respectively), possess strong surface plasmonic resonance (SPR) and high atomic number, which makes them ideal candidates for enhancing dosimeter sensitivity. In this study, we have inserted different mass percentages (from 0 to 0.015 wt%) of AuNPs into a gelatinous Fricke-xylenol-orange (FXO-f) gel matrix and irradiated it with doses ranging from 2 to 32 Gy, using a source of x-ray of low energy with an effective energy of 42 keV. Optical absorption increased significantly; sensitivity gains of up to 50% were achieved for the FXO-f gel matrix containing 0.011 wt% AuNPs. To elucidate the mechanism underlying this increased sensitivity, we also evaluated FXO-f gel matrixes containing AgNPs. AgNPs insertion into the FXO-f gel matrix did not enhance sensitivity, which suggested that the AgNPs plasmonic absorption band and the FXO-f gel matrix absorption band at 441 nm overlapped, to increase absorption even after the gel matrix was irradiated. To visualize the dose distribution, we recorded optical tomography and acquired 3D reconstruction maps. In addition, we analyzed the dose enhancement factor (DEF) by using magnetic resonance images. AuNPs insertion into the FXO-f gel matrix resulted in a DEF gain of 1.37, associated with the photoelectric effect originating from the increased number of free radicals.
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Affiliation(s)
- I S Lima
- Department of Physics, FFCLRP, University of São Paulo, Av. Bandeirantes 3900, Ribeirão Preto, SP 14040-91, Brazil
| | - M A Silveira
- Department of Physics, FFCLRP, University of São Paulo, Av. Bandeirantes 3900, Ribeirão Preto, SP 14040-91, Brazil
| | - J Pavoni
- Department of Physics, FFCLRP, University of São Paulo, Av. Bandeirantes 3900, Ribeirão Preto, SP 14040-91, Brazil
| | - J E Guidelli
- Department of Physics, FFCLRP, University of São Paulo, Av. Bandeirantes 3900, Ribeirão Preto, SP 14040-91, Brazil
| | - E C S Garrido
- Department of Physics, FFCLRP, University of São Paulo, Av. Bandeirantes 3900, Ribeirão Preto, SP 14040-91, Brazil
| | - O Baffa
- Department of Physics, FFCLRP, University of São Paulo, Av. Bandeirantes 3900, Ribeirão Preto, SP 14040-91, Brazil
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2
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Seo JA, Kang MC, Yang WM, Hwang WM, Kim SS, Hong SH, Heo JI, Vijyakumar A, de Moura LP, Uner A, Huang H, Lee SH, Lima IS, Park KS, Kim MS, Dagon Y, Willnow TE, Aroda V, Ciaraldi TP, Henry RR, Kim YB. Author Correction: Apolipoprotein J is a hepatokine regulating muscle glucose metabolism and insulin sensitivity. Nat Commun 2020; 11:2276. [PMID: 32371884 PMCID: PMC7200795 DOI: 10.1038/s41467-020-16305-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Affiliation(s)
- Ji A Seo
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Division of Endocrinology, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
| | - Min-Cheol Kang
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Research Group of Food Processing, Korea Food Research Institute, Wanju-gun, Jeollabuk-do, Korea
| | - Won-Mo Yang
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, Korea
| | - Won Min Hwang
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Division of Nephrology, Department of Internal Medicine, College of Medicine, Konyang University, Daejeon, Korea
| | - Sang Soo Kim
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Department of Internal Medicine and Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Soo Hyun Hong
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Columbia University, New York, NY, USA
| | - Jee-In Heo
- Division of Endocrinology, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
| | - Achana Vijyakumar
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - Leandro Pereira de Moura
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,School of Applied Science, University of Campinas, Limeira, Brazil
| | - Aykut Uner
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - Hu Huang
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,East Carolina University, East Carolina Diabetes and Obesity Institute, Greenville, NC, USA
| | - Seung Hwan Lee
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Inês S Lima
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Universidade Nova de Lisboa, Lisboa, Portugal
| | - Kyong Soo Park
- Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, Korea
| | - Min Seon Kim
- Department of Internal Medicine, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, Korea
| | - Yossi Dagon
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - Thomas E Willnow
- Molecular Cardiovascular Research, Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany
| | - Vanita Aroda
- Veterans Affairs San Diego Healthcare System (9111 G), San Diego, CA, 92161, USA.,Department of Medicine, University of California San Diego, La Jolla, CA, 92093, USA.,Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Theodore P Ciaraldi
- Veterans Affairs San Diego Healthcare System (9111 G), San Diego, CA, 92161, USA.,Department of Medicine, University of California San Diego, La Jolla, CA, 92093, USA
| | - Robert R Henry
- Veterans Affairs San Diego Healthcare System (9111 G), San Diego, CA, 92161, USA.,Department of Medicine, University of California San Diego, La Jolla, CA, 92093, USA
| | - Young-Bum Kim
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA. .,Research Group of Food Processing, Korea Food Research Institute, Wanju-gun, Jeollabuk-do, Korea.
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3
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Seo JA, Kang MC, Yang WM, Hwang WM, Kim SS, Hong SH, Heo JI, Vijyakumar A, Pereira de Moura L, Uner A, Huang H, Lee SH, Lima IS, Park KS, Kim MS, Dagon Y, Willnow TE, Aroda V, Ciaraldi TP, Henry RR, Kim YB. Apolipoprotein J is a hepatokine regulating muscle glucose metabolism and insulin sensitivity. Nat Commun 2020; 11:2024. [PMID: 32332780 PMCID: PMC7181874 DOI: 10.1038/s41467-020-15963-w] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 04/02/2020] [Indexed: 12/24/2022] Open
Abstract
Crosstalk between liver and skeletal muscle is vital for glucose homeostasis. Hepatokines, liver-derived proteins that play an important role in regulating muscle metabolism, are important to this communication. Here we identify apolipoprotein J (ApoJ) as a novel hepatokine targeting muscle glucose metabolism and insulin sensitivity through a low-density lipoprotein receptor-related protein-2 (LRP2)-dependent mechanism, coupled with the insulin receptor (IR) signaling cascade. In muscle, LRP2 is necessary for insulin-dependent IR internalization, an initial trigger for insulin signaling, that is crucial in regulating downstream signaling and glucose uptake. Of physiologic significance, deletion of hepatic ApoJ or muscle LRP2 causes insulin resistance and glucose intolerance. In patients with polycystic ovary syndrome and insulin resistance, pioglitazone-induced improvement of insulin action is associated with an increase in muscle ApoJ and LRP2 expression. Thus, the ApoJ-LRP2 axis is a novel endocrine circuit that is central to the maintenance of normal glucose homeostasis and insulin sensitivity. Hepatokines are proteins secreted by the liver that can regulate whole body metabolism. Here the authors identify apolipoprotein J as a hepatokine that regulates muscle glucose metabolism and insulin resistance through a low-density lipoprotein receptor-related protein−2 mediated mechanism in mice.
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Affiliation(s)
- Ji A Seo
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Division of Endocrinology, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
| | - Min-Cheol Kang
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Research Group of Food Processing, Korea Food Research Institute, Wanju-gun, Jeollabuk-do, Korea
| | - Won-Mo Yang
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, Korea
| | - Won Min Hwang
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Division of Nephrology, Department of Internal Medicine, College of Medicine, Konyang University, Daejeon, Korea
| | - Sang Soo Kim
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Department of Internal Medicine and Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Soo Hyun Hong
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Columbia University, New York, NY, USA
| | - Jee-In Heo
- Division of Endocrinology, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
| | - Achana Vijyakumar
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - Leandro Pereira de Moura
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,School of Applied Science, University of Campinas, Limeira, Brazil
| | - Aykut Uner
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - Hu Huang
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,East Carolina University, East Carolina Diabetes and Obesity Institute, Greenville, NC, USA
| | - Seung Hwan Lee
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Inês S Lima
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Universidade Nova de Lisboa, Lisboa, Portugal
| | - Kyong Soo Park
- Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, Korea
| | - Min Seon Kim
- Department of Internal Medicine, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, Korea
| | - Yossi Dagon
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - Thomas E Willnow
- Molecular Cardiovascular Research, Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany
| | - Vanita Aroda
- Veterans Affairs San Diego Healthcare System (9111 G), San Diego, CA, 92161, USA.,Department of Medicine, University of California San Diego, La Jolla, CA, 92093, USA.,Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Theodore P Ciaraldi
- Veterans Affairs San Diego Healthcare System (9111 G), San Diego, CA, 92161, USA.,Department of Medicine, University of California San Diego, La Jolla, CA, 92093, USA
| | - Robert R Henry
- Veterans Affairs San Diego Healthcare System (9111 G), San Diego, CA, 92161, USA.,Department of Medicine, University of California San Diego, La Jolla, CA, 92093, USA
| | - Young-Bum Kim
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.
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4
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Muñoz VR, Lima IS, Moura LP, Gaspar RC, Mekary RA, Silva VR, Ropelle ER, Kim YB, Pauli JR. Acute Physical Exercise Increases Glucose Uptake in Skeletal Muscle of Old Rats Through Rho-Kinase Metabolism. Med Sci Sports Exerc 2016. [DOI: 10.1249/01.mss.0000486736.86250.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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5
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Moura LP, Muñoz VR, Lima IS, Gaspar RC, Veiga CB, Ropelle ER, Cintra DE, Silva ASR, Botezelli JD, Mekary RA, Kang MC, Kim YB, Pauli JR. Physical Exercise Increases Glucose Uptake in Skeletal Muscle of Obese Mice Through Rho-Kinase Metabolism. Med Sci Sports Exerc 2016. [DOI: 10.1249/01.mss.0000487245.71186.cd] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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6
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Coelho M, Mendes VM, Lima IS, Martins FO, Fernandes AB, Macedo MP, Jones JG, Manadas B. Direct analysis of [6,6-(2)H2]glucose and [U-(13)C6]glucose dry blood spot enrichments by LC-MS/MS. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1022:242-248. [PMID: 27107853 DOI: 10.1016/j.jchromb.2016.04.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 02/01/2016] [Revised: 04/08/2016] [Accepted: 04/11/2016] [Indexed: 11/29/2022]
Abstract
A liquid chromatography tandem mass spectrometry (LC-MS/MS) using multiple reaction monitoring (MRM) in a triple-quadrupole scan mode was developed and comprehensively validated for the determination of [6,6-(2)H2]glucose and [U-(13)C6]glucose enrichments from dried blood spots (DBS) without prior derivatization. The method is demonstrated with dried blood spots obtained from rats administered with a primed-constant infusion of [U-(13)C6]glucose and an oral glucose load enriched with [6,6-(2)H2]glucose. The sensitivity is sufficient for analysis of the equivalent to <5μL of blood and the overall method was accurate and precise for the determination of DBS isotopic enrichments.
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Affiliation(s)
- Margarida Coelho
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, UC Biotech, Parque Tecnológico de Cantanhede, Núcleo 04, Lote 8, 3060-197 Cantanhede, Portugal
| | - Vera M Mendes
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, UC Biotech, Parque Tecnológico de Cantanhede, Núcleo 04, Lote 8, 3060-197 Cantanhede, Portugal
| | - Inês S Lima
- Chronic Diseases Research Center (CEDOC), NOVA Medical School/Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Rua Câmara Pestana n° 6, 6-A Edifício CEDOC II, 1150-082 Lisboa, Portugal
| | - Fátima O Martins
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, UC Biotech, Parque Tecnológico de Cantanhede, Núcleo 04, Lote 8, 3060-197 Cantanhede, Portugal; Chronic Diseases Research Center (CEDOC), NOVA Medical School/Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Rua Câmara Pestana n° 6, 6-A Edifício CEDOC II, 1150-082 Lisboa, Portugal; Institute for Interdisciplinary Research (IIIUC), University of Coimbra, Casa Costa Alemão, Pólo II, Rua Dom Francisco de Lemos, 3030-789 Coimbra, Portugal
| | - Ana B Fernandes
- Chronic Diseases Research Center (CEDOC), NOVA Medical School/Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Rua Câmara Pestana n° 6, 6-A Edifício CEDOC II, 1150-082 Lisboa, Portugal
| | - M Paula Macedo
- Chronic Diseases Research Center (CEDOC), NOVA Medical School/Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Rua Câmara Pestana n° 6, 6-A Edifício CEDOC II, 1150-082 Lisboa, Portugal; APDP-Portuguese Diabetes Association, Rua Rodrigo da Fonseca, n° 1, 1250-189 Lisboa, Portugal
| | - John G Jones
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, UC Biotech, Parque Tecnológico de Cantanhede, Núcleo 04, Lote 8, 3060-197 Cantanhede, Portugal; APDP-Portuguese Diabetes Association, Rua Rodrigo da Fonseca, n° 1, 1250-189 Lisboa, Portugal
| | - Bruno Manadas
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, UC Biotech, Parque Tecnológico de Cantanhede, Núcleo 04, Lote 8, 3060-197 Cantanhede, Portugal.
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7
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Kang MC, Kang N, Kim SY, Lima IS, Ko SC, Kim YT, Kim YB, Jeung HD, Choi KS, Jeon YJ. Popular edible seaweed, Gelidium amansii prevents against diet-induced obesity. Food Chem Toxicol 2016; 90:181-7. [PMID: 26911551 DOI: 10.1016/j.fct.2016.02.014] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [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: 10/28/2015] [Revised: 02/15/2016] [Accepted: 02/16/2016] [Indexed: 02/03/2023]
Abstract
The popular edible seaweed, Gelidium amansii is broadly used as food worldwide. To determine whether G. amansii extract (GAE) has protective effects on obesity, mice fed a high-fat diet (HFD) treated with GAE (1 and 3 %) were studied. After 12 weeks of GAE treatment, body weight was greatly decreased in mice fed a high-fat diet. This effect could be due to decreased adipogenesis, as evidenced by the fact that GAE suppressed adipogenic gene expression in adipocytes. In addition, blood glucose and serum insulin levels were reduced by GAE treatment in mice fed a high-fat diet, suggesting improvement in glucose metabolism. GAE supplementation also led to a significant decrease in total cholesterol and triglyceride levels. These data are further confirmed by H&E staining. Our findings indicate that Gelidium amansii prevents against the development of diet-induced obesity, and further implicate that GAE supplementation could be the therapeutical option for treatment of metabolic disorder such as obesity.
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Affiliation(s)
- Min-Cheol Kang
- Department of Marine Life Sciences, Jeju National University, Jeju 690-756, Republic of Korea; Division of Endocrinology, Diabetes and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - Nalae Kang
- Department of Marine Life Sciences, Jeju National University, Jeju 690-756, Republic of Korea
| | - Seo-Young Kim
- Department of Marine Life Sciences, Jeju National University, Jeju 690-756, Republic of Korea
| | - Inês S Lima
- Centro de Estudos de Doenças Crónicas CEDOC, NOVA Medical School/Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Lisbon, Portugal
| | - Seok-Chun Ko
- Marine-Integrated Bionics Research Center, Pukyong National University, Busan 608-737, Republic of Korea; Department of Biomedical Engineering, and Center for Marine-Integrated Biomedical Technology (BK21 Plus), Pukyong National University, Busan 608-737, Republic of Korea
| | - Young-Tae Kim
- Department of Food Science and Biotechnology, Kunsan National University, Gunsan 573-701, Republic of Korea
| | - Young-Bum Kim
- Division of Endocrinology, Diabetes and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - Hee-Do Jeung
- Tidal Flat Research Center, West Sea Fisheries Research Institute, National Institute of Fisheries Science (NIFS), 11 Seollim-gill, 54014 Gunsan, Republic of Korea
| | - Kwang-Sik Choi
- School of Marine Biomedical Science, Jeju National University, 102 Jejudaehakno, Jeju 690-756, Republic of Korea
| | - You-Jin Jeon
- Department of Marine Life Sciences, Jeju National University, Jeju 690-756, Republic of Korea.
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8
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Matsumoto S, Varela RM, Palma M, Molinillo JMG, Lima IS, Barroso CG, Macías FA. Bio-guided optimization of the ultrasound-assisted extraction of compounds from Annona glabra L. leaves using the etiolated wheat coleoptile bioassay. Ultrason Sonochem 2014; 21:1578-1584. [PMID: 24556321 DOI: 10.1016/j.ultsonch.2014.01.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 01/06/2014] [Accepted: 01/25/2014] [Indexed: 06/03/2023]
Abstract
A bio-guided optimization of the extraction of bioactive components from Annona glabra leaves has been developed using the etiolated wheat coleoptile bioassay as the control method. The optimization of an ultrasound-assisted extraction of bioactive compounds using allelopathy results as target values has been carried out for the first time. A two-level fractional factorial experimental design was applied to optimize the ultrasound-assisted extraction. The solvent was the extraction variable that had the most marked effect on the resulting bioactivity of the extracts in the etiolated wheat coleoptile bioassay. Extraction time, extraction temperature and the size of the ultrasonic probe also influenced the bioactivity of the extracts. A larger scale extraction was carried out in the next step in the allelopathic study, i.e., the isolation of compounds from the bioactive extract and chemical characterization by spectroscopic techniques, including NMR. Eight compounds were isolated and identified from the active extracts, namely two steroids (β-sistosterol and stigmasterol), five diterpenes with the kaurane skeleton (ent-kaur-16-en-19-oic acid, ent-19-methoxy-19-oxokauran-17-oic acid, annoglabasin B, ent-17-hydroxykaur-15-en-19-oic acid and ent-15β,16β-epoxy-17-hydroxy-kauran-19-oic acid) and the acetogenin asimicin. The most active compound was annoglabasin B, which showed inhibition with values of -95% at 10(-3) M, -87% at 5×10(-4) M and greater than -70% at 10(-4) M in the etiolated wheat coleoptile bioassay.
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Affiliation(s)
- Sadao Matsumoto
- Department of Botany, Federal University of São Carlos, CP 676, CEP 13565-905 São Carlos, São Paulo, Brazil
| | - Rosa M Varela
- Department of Organic Chemistry, Faculty of Science, Agrifood Campus of International Excellence (ceiA3), University of Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Miguel Palma
- Department of Analytical Chemistry, Faculty of Science, Agrifood Campus of International Excellence (ceiA3), University of Cádiz, 11510 Puerto Real, Cádiz, Spain.
| | - José M G Molinillo
- Department of Organic Chemistry, Faculty of Science, Agrifood Campus of International Excellence (ceiA3), University of Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Inês S Lima
- Department of Botany, Federal University of São Carlos, CP 676, CEP 13565-905 São Carlos, São Paulo, Brazil
| | - Carmelo G Barroso
- Department of Analytical Chemistry, Faculty of Science, Agrifood Campus of International Excellence (ceiA3), University of Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Francisco A Macías
- Department of Organic Chemistry, Faculty of Science, Agrifood Campus of International Excellence (ceiA3), University of Cádiz, 11510 Puerto Real, Cádiz, Spain
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9
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Abstract
Ingestion of a meal is the greatest challenge faced by glucose homeostasis. The surge of nutrients has to be disposed quickly, as high concentrations in the bloodstream may have pathophysiological effects, and also properly, as misplaced reserves may induce problems in affected tissues. Thus, loss of the ability to adequately dispose of ingested nutrients can be expected to lead to glucose intolerance, and favor the development of pathologies. Achieving interplay of several organs is of upmost importance to maintain effectively postprandial glucose clearance, with the liver being responsible of orchestrating global glycemic control. This dogmatic role of the liver in postprandial insulin sensitivity is tightly associated with the vagus nerve. Herein, we uncover the behaviour of metabolic pathways determined by hepatic parasympathetic function status, in physiology and in pathophysiology. Likewise, the inquiry expands to address the impact of a modern lifestyle, especially one's feeding habits, on the hepatic parasympathetic nerve control of glucose metabolism.
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Affiliation(s)
- Maria Paula Macedo
- CEDOC, Faculdade de Ciências Médicas (FCM), Universidade Nova de Lisboa (UNL), 1169-056, Lisboa, Portugal,
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10
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Afonso RA, Fernandes AB, Santos C, Ligeiro D, Ribeiro RT, Lima IS, Patarrao RS, Videira PA, Caldeira J, Macedo MP. Postprandial insulin resistance in Zucker diabetic fatty rats is associated with parasympathetic-nitric oxide axis deficiencies. J Neuroendocrinol 2012; 24:1346-55. [PMID: 22672343 DOI: 10.1111/j.1365-2826.2012.02341.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The Zucker diabetic fatty (ZDF) rat is an obesity and type 2 diabetes model. Progression to diabetes is well characterised in ZDF rats, but only in the fasted state. We evaluated the mechanisms underlying postprandial insulin resistance in young ZDF rats. We tested the hypothesis that the overall postprandial action of insulin is affected in ZDF rats as a result of impairment of the hepatic parasympathetic-nitric oxide (PSN-NO) axis and/or glutathione (GSH), resulting in decreased indirect (PSN-NO axis) and direct actions of insulin. Nine-week-old male ZDF rats and lean Zucker rats (LZR, controls) were used. The action of insulin was assessed in the fed state before and after parasympathetic antagonism atropine. Basal hepatic NO and GSH were measured, as well as NO synthase (NOS) and γ-glutamyl-cysteine synthethase (GCS) activity and expression. ZDF rats presented postprandial hyperglycaemia (ZDF, 201.4 ± 12.9 mg/dl; LZR, 107.7 ± 4.3 mg/dl), but not insulinopaenia (ZDF, 5.9 ± 0.8 ng/ml; LZR, 1.5 ± 0.3 ng/ml). Total postprandial insulin resistance was observed (ZDF, 78.6 ± 7.5 mg glucose/kg; LZR, 289.2 ± 24.7 mg glucose/kg), with a decrease in both the direct action of insulin (ZDF, 54.8 ± 7.0 mg glucose/kg; LZR, 173.3 ± 20.5 mg glucose/kg) and the PSN-NO axis (ZDF, 24.5 ± 3.9 mg glucose/kg; LZR, 115.9 ± 19.4 mg glucose/kg). Hepatic NO (ZDF, 117.2 ± 11.4 μmol/g tissue; LZR, 164.6 ± 4.9 μmol/g tissue) and GSH (ZDF, 4.9 ± 0.3 μmol/g; LZR, 5.9 ± 0.2 μmol/g) were also compromised as a result of decreased NOS and GCS activity, respectively. These results suggest a compromise of the mechanism responsible for potentiating insulin action after a meal in ZDF rats. We show that defective PSN-NO axis and GSH synthesis, together with an impaired direct action of insulin, appears to contribute to postprandial insulin resistance in this model.
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Affiliation(s)
- R A Afonso
- CEDOC, Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Campo Mártires da Pátria, Lisboa, Portugal
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Pavan FA, Lima IS, Benvenutti EV, Gushikem Y, Airoldi C. Hybrid aniline/silica xerogel cation adsorption and thermodynamics of interaction. J Colloid Interface Sci 2004; 275:386-91. [PMID: 15178263 DOI: 10.1016/j.jcis.2004.03.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2003] [Accepted: 03/04/2004] [Indexed: 10/26/2022]
Abstract
Aniline groups chemically immobilized on silica through the sol-gel process were employed to extract divalent nickel and manganese from aqueous solutions at room temperature. The maximum adsorption capacity of the xerogel was studied from adsorption isotherms using a batch technique. The isotherms obtained were adjusted following the Langmuir equation. The xerogel adsorbent appears to have better affinity for nickel than manganese. From calorimetric titration, thermodynamic data on cation/nitrogen basic atom interaction in the solid/liquid interface were determined. The enthalpic values, -0.46 +/- 0.02 and -.029 +/- 0.02 kJ mol(-1) for nickel and manganese, respectively, are in agreement with the low availability of the basic nitrogen atom on the aniline group and also the possible steric hindrance of the phenyl group bonded to nitrogen. However, thermodynamics indicated the existence of favorable conditions for such cation-nitrogen interactions.
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Affiliation(s)
- F A Pavan
- Instituto de Química, Universidade Estadual de Campinas, Caixa Postal 6154, 13084-971 Campinas, São Paulo, Brazil
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