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Simultaneous quantification of dexamethasone and 6β-hydroxydexamethasone in rabbit plasma, aqueous and vitreous humor, and retina by UHPLC-MS/MS. Bioanalysis 2021; 13:1051-1062. [PMID: 34100308 DOI: 10.4155/bio-2021-0088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Aim: To develop and validate a fit for purpose method for the simultaneous determination of dexamethasone and its major metabolite, 6β-hydroxydexamethasone, in rabbit plasma and ocular matrices to measure the in vivo release and distribution profile of dexamethasone from intravitreal implants. Materials & methods: An UHPLC-MS/MS system was employed to perform the bioanalysis. The method was validated according to the US FDA Bioanalytical Method Validation Guidance for Industry. Results & conclusion: The method was found to be fit-for-purpose for the described biological matrices and had a LLOQ of 0.1 ng/ml.
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Henn L, Zanta NC, Girardi CEN, Suchecki D. Chronic Escitalopram Treatment Does Not Alter the Effects of Neonatal Stress on Hippocampal BDNF Levels, 5-HT 1A Expression and Emotional Behaviour of Male and Female Adolescent Rats. Mol Neurobiol 2021; 58:926-943. [PMID: 33063280 DOI: 10.1007/s12035-020-02164-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 10/07/2020] [Indexed: 10/23/2022]
Abstract
Early life stress is considered a risk factor for the development of long-term psychiatric disorders. Maternal deprivation (MD) is a useful paradigm to understand the neurobiological underpinnings of early stress-induced changes in neurodevelopment trajectory. The goal of the present study was to examine the effects of a chronic treatment with escitalopram (ESC) on the hippocampal levels of BDNF and neuropeptide Y (NPY), expression of serotonin type 1A receptor (5-HT1A), plasma corticosterone levels and emotional behaviours in male and female adolescent rats submitted to MD at 9 days of life (group DEP9) and challenged with a brief and mild stress (saline injection (SAL)) at the end of MD. Whole litters were kept with mothers (CTL) or submitted to MD (DEP9). Within each group, pups were stress-challenged (CTL-SAL and DEP9-SAL) or not (CTL-NSAL and DEP9-NSAL). ESC or vehicle treatments began at weaning and lasted 24 days, when animals were sacrificed for determination of neurobiological variables or submitted to a battery of tests for evaluation of emotional behaviours. The results showed that BDNF levels were higher in SAL-challenged males and in DEP9-SAL females, whereas 5-HT1A receptor expression was reduced in DEP9 males and in SAL-challenged females. There were no changes in NPY or corticosterone levels. In the forced swim test, SAL-challenged males and DEP9 females displayed less immobility and ESC only increased social motivation in males. The results indicated that neonatal stress led to sex-dependent changes in neurobiology and behaviour and that chronic ESC treatment had minor effects on these parameters.
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Affiliation(s)
- Lorena Henn
- Departamento de Psicobiologia, Universidade Federal de São Paulo, Rua Napoleão de Barros, 925, 1° andar, São Paulo, SP, 04024-002, Brazil
| | - Natália C Zanta
- Departamento de Psicobiologia, Universidade Federal de São Paulo, Rua Napoleão de Barros, 925, 1° andar, São Paulo, SP, 04024-002, Brazil
| | - Carlos Eduardo N Girardi
- Departamento de Psicobiologia, Universidade Federal de São Paulo, Rua Napoleão de Barros, 925, 1° andar, São Paulo, SP, 04024-002, Brazil
| | - Deborah Suchecki
- Departamento de Psicobiologia, Universidade Federal de São Paulo, Rua Napoleão de Barros, 925, 1° andar, São Paulo, SP, 04024-002, Brazil.
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Barroca NCB, Baes CVW, Martins-Monteverde CMS, Bosaipo NB, Santos da Silva Umeoka M, Tejada J, Antunes-Rodrigues J, de Castro M, Juruena MF, Garcia-Cairasco N, Umeoka EHDL. Evaluation of the HPA Axis' Response to Pharmacological Challenges in Experimental and Clinical Early-Life Stress-Associated Depression. eNeuro 2021; 8:ENEURO.0222-20.2020. [PMID: 33318074 PMCID: PMC7814478 DOI: 10.1523/eneuro.0222-20.2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 10/27/2020] [Accepted: 11/20/2020] [Indexed: 02/08/2023] Open
Abstract
Early-life stress (ELS) is associated with a higher risk of psychopathologies in adulthood, such as depression, which may be related to persistent changes in the hypothalamic-pituitary-adrenal (HPA) axis. This study aimed to evaluate the effects of ELS on the functioning of the HPA axis in clinical and experimental situations. Clinically, patients with current depressive episodes, with and without ELS, and healthy controls, composed the sample. Subjects took a capsule containing placebo, fludrocortisone, prednisolone, dexamethasone or spironolactone followed by an assessment of plasma cortisol the morning after. Experimentally, male Wistar rats were submitted to ELS protocol based on variable, unpredictable stressors from postnatal day (PND)1 to PND21. On PND65 animals were behaviorally evaluated through the forced-swimming test (FST). At PND68, pharmacological challenges started, using mifepristone, dexamethasone, spironolactone, or fludrocortisone, and corticosterone levels were determined 3 h after injections. Cortisol response of the patients did not differ significantly from healthy subjects, regardless of their ELS history, and it was lower after fludrocortisone, prednisolone, and dexamethasone compared with placebo, indicating the suppression of plasma cortisol by all these treatments. Animals exposed to ELS presented altered phenotype as indicated by an increased immobility time in the FST when compared with control, but no significant long-lasting effects of ELS were observed on the HPA axis response. Limitations on the way the volunteers were sampled may have contributed to the lack of ELS effects on the HPA axis, pointing out the need for further research to understand these complex phenomena.
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Affiliation(s)
- Nayara Cobra Barreiro Barroca
- Neuroscience and Behavioral Sciences Department, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, 14040-900, Brazil
| | - Cristiane Von Werne Baes
- Neuroscience and Behavioral Sciences Department, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, 14040-900, Brazil
| | | | - Nayanne Beckmann Bosaipo
- Neuroscience and Behavioral Sciences Department, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, 14040-900, Brazil
| | - Marcia Santos da Silva Umeoka
- Physiology Department, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, 14040-900, Brazil
- Research Group on Neurobiology of Behavior, Cognition and Emotions, Faculty of Medicine, University Center Unicerrado, Goiatuba, 75600-000, Brazil
| | - Julian Tejada
- Psychology Department, Federal University of Sergipe, São Cristóvão, 49100-000, Brazil
| | - José Antunes-Rodrigues
- Physiology Department, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, 14040-900, Brazil
| | - Margaret de Castro
- Physiology Department, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, 14040-900, Brazil
| | - Mario Francisco Juruena
- Neuroscience and Behavioral Sciences Department, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, 14040-900, Brazil
- Department of Psychological Medicine, Kings College London, London, SE5 8AF, United Kingdom
| | - Norberto Garcia-Cairasco
- Neuroscience and Behavioral Sciences Department, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, 14040-900, Brazil
- Physiology Department, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, 14040-900, Brazil
| | - Eduardo Henrique de Lima Umeoka
- Neuroscience and Behavioral Sciences Department, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, 14040-900, Brazil
- Research Group on Neurobiology of Behavior, Cognition and Emotions, Faculty of Medicine, University Center Unicerrado, Goiatuba, 75600-000, Brazil
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Mograbi KDM, Suchecki D, da Silva SG, Covolan L, Hamani C. Chronic unpredictable restraint stress increases hippocampal pro-inflammatory cytokines and decreases motivated behavior in rats. Stress 2020; 23:427-436. [PMID: 31928117 DOI: 10.1080/10253890.2020.1712355] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Most chronic stress protocols are too laborious or do not abide by the two main characteristics of the stress concept: uncontrollability and unpredictability. The goal of this study was to establish a simple and reliable model of chronic stress, while maintaining the main features of the concept. Animals were exposed to chronic movement restraint with variable duration (2, 4 or 6 h, in an unpredictable schedule) for 3 weeks and assessed in several physiological and behavioral readouts known to reflect chronic stress states. Body weight, levels of plasma corticosterone, hippocampal pro-and anti-inflammatory cytokines, anxiety-like (novelty suppressed feeding and elevated plus maze) and motivated behaviors (sucrose negative contrast test and forced swim test) were evaluated three days after the end of the chronic protocol. Stressed animals had a lower body weight gain, higher levels of cytokines in the hippocampus, reduced suppression of a low concentration sucrose solution and increased immobility in the forced swim test. Based on these data, we suggest that chronic movement restraint with variable duration may be a suitable and simple protocol for the study of changes induced by chronic stress and for the testing of possible treatments relevant to psychiatry.
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Affiliation(s)
| | - Deborah Suchecki
- Departament of Psychobiology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Sérgio Gomes da Silva
- Hospital do Câncer de Muriaé - Fundação Cristiano Varella, Centro Universitário UNIFAMINAS, Muriaé, Brazil
| | - Luciene Covolan
- Departament of Physiology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Clement Hamani
- Division of Neurosurgery, Harquail Centre for Neuromodulation, Sunnybrook Research Institute, University of Toronto, Toronto, Canada
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dos Santos IB, Lopes MDS, Bini AP, Tschoeke BAP, Verssani BAW, Figueredo EF, Cataldi TR, Marques JPR, Silva LD, Labate CA, Quecine MC. The Eucalyptus Cuticular Waxes Contribute in Preformed Defense Against Austropuccinia psidii. FRONTIERS IN PLANT SCIENCE 2019; 9:1978. [PMID: 30687371 PMCID: PMC6334236 DOI: 10.3389/fpls.2018.01978] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 12/19/2018] [Indexed: 05/02/2023]
Abstract
Austropuccinia psidii, the causal agent of myrtle rust, is a biotrophic pathogen whose growth and development depends on the host tissues. The uredospores of A. psidii infect Eucalyptus by engaging in close contact with the host surface and interacting with the leaf cuticle that provides important chemical and physical signals to trigger the infection process. In this study, the cuticular waxes of Eucalyptus spp. were analyzed to determine their composition or structure and correlation with susceptibility/resistance to A. psidii. Twenty-one Eucalyptus spp. in the field were classified as resistant or susceptible. The resistance/susceptibility level of six Eucalyptus spp. were validated in controlled conditions using qPCR, revealing that the pathogen can germinate on the eucalyptus surface of some species without multiplying in the host. CG-TOF-MS analysis detected 26 compounds in the Eucalyptus spp. cuticle and led to the discovery of the role of hexadecanoic acid in the susceptibility of Eucalyptus grandis and Eucalyptus phaeotricha to A. psidii. We characterized the epicuticular wax morphology of the six previously selected Eucalyptus spp. using scanning electron microscopy and observed different behavior in A. psidii germination during host infection. It was found a correlation of epicuticular morphology on the resistance to A. psidii. However, in this study, we provide the first report of considerable interspecific variation in Eucalyptus spp. on the susceptibility to A. psidii and its correlation with cuticular waxes chemical compounds that seem to play a synergistic role as a preformed defense mechanism.
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Affiliation(s)
- Isaneli Batista dos Santos
- Departament of Genetics, “Luiz de Queiroz” College of Agriculture, University of São Paulo, Piracicaba, Brazil
| | - Mariana da Silva Lopes
- Departament of Genetics, “Luiz de Queiroz” College of Agriculture, University of São Paulo, Piracicaba, Brazil
| | - Andressa Peres Bini
- Departament of Genetics, “Luiz de Queiroz” College of Agriculture, University of São Paulo, Piracicaba, Brazil
| | | | | | | | - Thais Regiani Cataldi
- Departament of Genetics, “Luiz de Queiroz” College of Agriculture, University of São Paulo, Piracicaba, Brazil
| | - João Paulo Rodrigues Marques
- Departament of Phytopathology, “Luiz de Queiroz” College of Agriculture, University of São Paulo, Piracicaba, Brazil
| | - Luciana Duque Silva
- Departament of Forest Science, “Luiz de Queiroz” College of Agriculture, University of São Paulo, Piracicaba, Brazil
| | - Carlos Alberto Labate
- Departament of Genetics, “Luiz de Queiroz” College of Agriculture, University of São Paulo, Piracicaba, Brazil
| | - Maria Carolina Quecine
- Departament of Genetics, “Luiz de Queiroz” College of Agriculture, University of São Paulo, Piracicaba, Brazil
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Drotleff B, Hallschmid M, Lämmerhofer M. Quantification of steroid hormones in plasma using a surrogate calibrant approach and UHPLC-ESI-QTOF-MS/MS with SWATH-acquisition combined with untargeted profiling. Anal Chim Acta 2018; 1022:70-80. [DOI: 10.1016/j.aca.2018.03.040] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 03/16/2018] [Accepted: 03/20/2018] [Indexed: 11/16/2022]
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7
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Altman DE, Simmons LP, Vuong CT, Taylor RM, Sousa JC, Marcsisin SR, Zottig VE, Moore NLT. Developmental differences in stress responding after repeated underwater trauma exposures in rats. Stress 2018; 21:267-273. [PMID: 29451058 DOI: 10.1080/10253890.2018.1439012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Adolescence is a distinct developmental period characterized by behavioral and physiological maturation. Rapid ongoing changes during neurodevelopment in particular present potential opportunities for stress to have lasting effects on longitudinal outcomes of behavioral and neuroendocrine function. While adult stress effects on outcomes during adulthood have been characterized, little is known about the lasting effects of adolescent repeated stressor exposure on outcomes during adolescence. We have previously reported different stress responses in adolescent rats relative to adult rats, including a blunted fear response outcome in adulthood in rats stressed during adolescence. The present study characterized the ontogeny of behavioral and neuroendocrine responses to eight underwater trauma (UWT) exposures in rats over a two week poststress time period during adolescence (P34) or adulthood (P83) relative to age-matched control groups that underwent eight swimming episodes without UWT. Repeated UWT exposures starting in adolescence, but not adulthood, resulted in adverse behavioral responses on the elevated plus maze 1 day post-stress. Corticosterone responses did not differ between UWT-exposed and controls for either age group at 1 day or at 7 days poststress, although there was an effect of age on corticosterone levels. We conclude that repeated UWT stress events have a lasting, negative behavioral effect on adolescent rats that is not observed in adult rats after the two-week exposure window. These results suggest that neurophysiological mechanisms underlying recovery from a repeated stressor are immature in adolescence relative to adulthood in rats.
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Affiliation(s)
- Daniel E Altman
- a Center for Military Psychiatry and Neuroscience, Department of Behavioral Biology , Walter Reed Army Institute of Research , Silver Spring , MD , USA
| | - Laurence P Simmons
- a Center for Military Psychiatry and Neuroscience, Department of Behavioral Biology , Walter Reed Army Institute of Research , Silver Spring , MD , USA
| | - Chau T Vuong
- b Division of Experimental Therapeutics, Drug Metabolism and Distribution Branch , Walter Reed Army Institute of Research , Silver Spring , MD , USA
| | - Rachel M Taylor
- a Center for Military Psychiatry and Neuroscience, Department of Behavioral Biology , Walter Reed Army Institute of Research , Silver Spring , MD , USA
| | - Jason C Sousa
- b Division of Experimental Therapeutics, Drug Metabolism and Distribution Branch , Walter Reed Army Institute of Research , Silver Spring , MD , USA
| | - Sean R Marcsisin
- b Division of Experimental Therapeutics, Drug Metabolism and Distribution Branch , Walter Reed Army Institute of Research , Silver Spring , MD , USA
| | - Victor E Zottig
- b Division of Experimental Therapeutics, Drug Metabolism and Distribution Branch , Walter Reed Army Institute of Research , Silver Spring , MD , USA
| | - Nicole L T Moore
- a Center for Military Psychiatry and Neuroscience, Department of Behavioral Biology , Walter Reed Army Institute of Research , Silver Spring , MD , USA
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8
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Li X, DuBois DC, Song D, Almon RR, Jusko WJ, Chen X. Modeling Combined Immunosuppressive and Anti-inflammatory Effects of Dexamethasone and Naproxen in Rats Predicts the Steroid-Sparing Potential of Naproxen. Drug Metab Dispos 2017; 45:834-845. [PMID: 28416614 DOI: 10.1124/dmd.117.075614] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Accepted: 04/13/2017] [Indexed: 12/29/2022] Open
Abstract
Dexamethasone (DEX), a widely prescribed corticosteroid, has long been the cornerstone of the treatment of inflammation and immunologic dysfunctions in rheumatoid arthritis. Corticosteroids are frequently used in combination with other antirheumatic agents such as nonsteroidal anti-inflammatory drugs (NSAIDs) and disease-modifying antirheumatic drugs to mitigate disease symptoms and minimize unwanted effects. We explored the steroid dose-sparing potential of the NSAID naproxen (NPX) with in vitro and in vivo studies. The single and joint suppressive effects of DEX and NPX on the in vitro mitogen-induced proliferation of T lymphocytes in blood and their anti-inflammatory actions on paw edema were investigated in female and male Lewis rats with collagen-induced arthritis (CIA). As expected, DEX was far more potent than NPX in these systems. Mathematical models incorporating an interaction term ψ were applied to quantitatively assess the nature and intensity of pharmacodynamic interactions between DEX and NPX. Modest synergistic effects of the two drugs were found in suppressing the mitogenic response of T lymphocytes. A pharmacokinetic/pharmacodynamic/disease progression model integrating dual drug inhibition quantitatively described the pharmacokinetics, time-course of single and joint anti-inflammatory effects (paw edema), and sex differences in CIA rats, and indicated additive effects of DEX and NPX. Further model simulations demonstrated the promising steroid-sparing potential of NPX in CIA rats, with the beneficial effects of the combination therapy more likely in males than females.
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Affiliation(s)
- Xiaonan Li
- Clinical Pharmacokinetics Laboratory, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, People's Republic of China (X.L., X.C.); Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences (X.L., D.C.D., D.S., R.R.A., W.J.J.), and Department of Biological Sciences (D.C.D., R.R.A.), State University of New York at Buffalo, Buffalo, New York
| | - Debra C DuBois
- Clinical Pharmacokinetics Laboratory, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, People's Republic of China (X.L., X.C.); Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences (X.L., D.C.D., D.S., R.R.A., W.J.J.), and Department of Biological Sciences (D.C.D., R.R.A.), State University of New York at Buffalo, Buffalo, New York
| | - Dawei Song
- Clinical Pharmacokinetics Laboratory, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, People's Republic of China (X.L., X.C.); Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences (X.L., D.C.D., D.S., R.R.A., W.J.J.), and Department of Biological Sciences (D.C.D., R.R.A.), State University of New York at Buffalo, Buffalo, New York
| | - Richard R Almon
- Clinical Pharmacokinetics Laboratory, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, People's Republic of China (X.L., X.C.); Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences (X.L., D.C.D., D.S., R.R.A., W.J.J.), and Department of Biological Sciences (D.C.D., R.R.A.), State University of New York at Buffalo, Buffalo, New York
| | - William J Jusko
- Clinical Pharmacokinetics Laboratory, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, People's Republic of China (X.L., X.C.); Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences (X.L., D.C.D., D.S., R.R.A., W.J.J.), and Department of Biological Sciences (D.C.D., R.R.A.), State University of New York at Buffalo, Buffalo, New York
| | - Xijing Chen
- Clinical Pharmacokinetics Laboratory, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, People's Republic of China (X.L., X.C.); Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences (X.L., D.C.D., D.S., R.R.A., W.J.J.), and Department of Biological Sciences (D.C.D., R.R.A.), State University of New York at Buffalo, Buffalo, New York
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9
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Song H, Li W, Liu BM, Sun XM, Ding JX, Chen N, Ji YB, Xiang Z. Study of the estrogenic-like mechanism of glycosides of cistanche using metabolomics. RSC Adv 2017. [DOI: 10.1039/c7ra06930h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Cistanche deserticola, known as Rou Cong-Rong in China, has been used as a tonic for more than 1800 years, with previous studies demonstrating that glycosides of cistanche (GCs) are a main active component.
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Affiliation(s)
- H. Song
- Institute of Materia Medica
- Research Center of Life Sciences and Environmental Sciences
- Harbin University of Commerce
- Harbin
- China
| | - W. L. Li
- School of Pharmacy
- Harbin University of Commerce
- Harbin
- China
| | - B. M. Liu
- Heilongjiang Provincial Hospital
- Harbin
- China
| | - X. M. Sun
- Institute of Materia Medica
- Research Center of Life Sciences and Environmental Sciences
- Harbin University of Commerce
- Harbin
- China
| | - J. X. Ding
- Institute of Materia Medica
- Research Center of Life Sciences and Environmental Sciences
- Harbin University of Commerce
- Harbin
- China
| | - N. Chen
- Institute of Materia Medica
- Research Center of Life Sciences and Environmental Sciences
- Harbin University of Commerce
- Harbin
- China
| | - Y. B. Ji
- Institute of Materia Medica
- Research Center of Life Sciences and Environmental Sciences
- Harbin University of Commerce
- Harbin
- China
| | - Z. Xiang
- Institute of Materia Medica
- Research Center of Life Sciences and Environmental Sciences
- Harbin University of Commerce
- Harbin
- China
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10
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Cheng Y, Li L, Zhu B, Liu F, Wang Y, Gu X, Yan C. Expanded metabolomics approach to profiling endogenous carbohydrates in the serum of ovarian cancer patients. J Sep Sci 2015; 39:316-23. [DOI: 10.1002/jssc.201500964] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 10/23/2015] [Accepted: 10/24/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Yu Cheng
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai China
| | - Li Li
- Department of Gynecology, Affiliated Tumor Hospital; Xinjiang Medical University; Ürümqi China
| | - Bangjie Zhu
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai China
| | - Feng Liu
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai China
| | - Yan Wang
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai China
| | - Xue Gu
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai China
| | - Chao Yan
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai China
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11
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Kinoshita K, Arai K, Kawaura K, Hiyoshi T, Yamaguchi JI. Development, validation, and application of a surrogate analyte method for determining N-acetyl-l-aspartyl-l-glutamic acid levels in rat brain, plasma, and cerebrospinal fluid. J Chromatogr B Analyt Technol Biomed Life Sci 2015; 1003:1-11. [DOI: 10.1016/j.jchromb.2015.09.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 09/04/2015] [Accepted: 09/05/2015] [Indexed: 01/10/2023]
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12
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Graversen JH, Moestrup SK. Drug Trafficking into Macrophages via the Endocytotic Receptor CD163. MEMBRANES 2015; 5:228-52. [PMID: 26111002 PMCID: PMC4496642 DOI: 10.3390/membranes5020228] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 06/11/2015] [Indexed: 12/12/2022]
Abstract
In inflammatory diseases, macrophages are a main producer of a range of cytokines regulating the inflammatory state. This also includes inflammation induced by tumor growth, which recruits so-called tumor-associated macrophages supporting tumor growth. Macrophages are therefore relevant targets for cytotoxic or phenotype-modulating drugs in the treatment of inflammatory and cancerous diseases. Such targeting of macrophages has been tried using the natural propensity of macrophages to non-specifically phagocytose circulating foreign particulate material. In addition, the specific targeting of macrophage-expressed receptors has been used in order to obtain a selective uptake in macrophages and reduce adverse effects of off-target delivery of drugs. CD163 is a highly expressed macrophage-specific endocytic receptor that has been studied for intracellular delivery of small molecule drugs to macrophages using targeted liposomes or antibody drug conjugates. This review will focus on the biology of CD163 and its potential role as a target for selective macrophage targeting compared with other macrophage targeting approaches.
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Affiliation(s)
- Jonas Heilskov Graversen
- Institute of Molecular Medicine, University of Southern Denmark, J. B. Winsløws Vej 25, 5000-Odense C, Denmark.
| | - Søren Kragh Moestrup
- Institute of Molecular Medicine, University of Southern Denmark, J. B. Winsløws Vej 25, 5000-Odense C, Denmark.
- Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, 5000-Odense C, Denmark.
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Gong W, Liu S, Xu P, Fan M, Xue M. Simultaneous Quantification of Diazepam and Dexamethasone in Plasma by High-Performance Liquid Chromatography with Tandem Mass Spectrometry and Its Application to a Pharmacokinetic Comparison between Normoxic and Hypoxic Rats. Molecules 2015; 20:6901-12. [PMID: 25913929 PMCID: PMC6272486 DOI: 10.3390/molecules20046901] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 04/07/2015] [Accepted: 04/13/2015] [Indexed: 11/16/2022] Open
Abstract
In order to investigate the pharmacokinetics of a combination of diazepam and dexamethasone under hypoxic conditions, a novel, sensitive and specific liquid chromatography with tandem mass spectrometry (LC-MS/MS) method for the simultaneous determination of diazepam and dexamethasone in rat plasma was developed and validated. The chromatographic separation of analytes was successfully achieved on an XTerra® MS C18 column using a gradient elution of methanol and water containing 0.1% formic acid at a flow rate of 0.5 mL/min. This method demonstrated good linearity and no endogenous material interferences. The linear ranges were 1.0-100 ng/mL for diazepam and 2.0-200 ng/mL for dexamethasone. The intra- and inter-day precision for the two compounds in plasma were lower than 10.0%, and the accuracy was between -7.9% and 11.5%. Our method was then successfully applied in a pharmacokinetic comparison between normoxic and hypoxic rats. The results indicated that there were significant differences in the main pharmacokinetics parameters of diazepam and dexamethasone between normoxic and hypoxic rats. The results provide the important and valuable information for discovering and developing novel anti-hypoxia drug combinations, as well as a better understanding of the safety and efficacy of these drugs.
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Affiliation(s)
- Wenwen Gong
- Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China.
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China.
| | - Shuhong Liu
- Department of Cognitive Sciences, Beijing Institute of Basic Medical Sciences, Beijing 100850, China.
| | - Pingxiang Xu
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China.
- Beijing Laboratory for Biomedical Detection Technology and Instrument, Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China.
| | - Ming Fan
- Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China.
- Department of Cognitive Sciences, Beijing Institute of Basic Medical Sciences, Beijing 100850, China.
| | - Ming Xue
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China.
- Beijing Laboratory for Biomedical Detection Technology and Instrument, Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China.
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14
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Zhu B, Liu F, Li X, Wang Y, Gu X, Dai J, Wang G, Cheng Y, Yan C. Fast quantification of endogenous carbohydrates in plasma using hydrophilic interaction liquid chromatography coupled with tandem mass spectrometry. J Sep Sci 2014; 38:34-41. [DOI: 10.1002/jssc.201400899] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Revised: 10/08/2014] [Accepted: 10/08/2014] [Indexed: 12/12/2022]
Affiliation(s)
- Bangjie Zhu
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai China
| | - Feng Liu
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai China
| | - Xituo Li
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai China
| | - Yan Wang
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai China
| | - Xue Gu
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai China
| | - Jieyu Dai
- DMPK Department; HD Biosciences; Shanghai China
| | - Guiming Wang
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai China
| | - Yu Cheng
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai China
| | - Chao Yan
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai China
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15
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De Baere S, Rosendahl Larsen T, Devreese M, De Backer P, De Neve L, Fairhurst G, Lens L, Croubels S. Use of LC–MS–MS as an alternative to currently available immunoassay methods to quantitate corticosterone in egg yolk and albumen. Anal Bioanal Chem 2014; 407:4351-62. [DOI: 10.1007/s00216-014-8269-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 10/12/2014] [Accepted: 10/13/2014] [Indexed: 01/19/2023]
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16
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Li H, Sheng LP, Wang B, Yang ZL, Liu SY. An Optimized Method for Corticosterone Analysis in Mouse Plasma by Ultra-Performance Liquid Chromatography-Full-Scan High-Resolution Accurate Mass Spectrometry. J Chromatogr Sci 2014; 53:285-94. [DOI: 10.1093/chromsci/bmu056] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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17
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Joshi A, Stagni G, Cleary A, Patel K, Weiss DS, Hagins M. Iontophoresis Successfully Delivers Dexamethasone Sodium Phosphate to Dermis as Measured by Microdialysis. J Pharm Sci 2014; 103:191-6. [DOI: 10.1002/jps.23771] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 09/29/2013] [Accepted: 10/14/2013] [Indexed: 11/09/2022]
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18
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Kang L, Jiang T, Ge X, Peng L, Xie Y, Luan X, Li H, Rong Z, Qi H, Chen H. Determination of the stress biomarker corticosterone in serum of tumor-bearing mice by surrogate-based liquid chromatography-tandem mass spectrometry. Biomed Chromatogr 2013; 27:1639-46. [DOI: 10.1002/bmc.2973] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2013] [Revised: 05/23/2013] [Accepted: 05/23/2013] [Indexed: 01/08/2023]
Affiliation(s)
- Lei Kang
- Department of Pharmacology; Institute of Medical Sciences, Shanghai Jiao Tong University School of Medicine; Shanghai 200025 China
- Department of Pharmacy, Shanghai First People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai 200080 China
| | - Tao Jiang
- Department of Pharmacology; Institute of Medical Sciences, Shanghai Jiao Tong University School of Medicine; Shanghai 200025 China
| | - Xinxing Ge
- Department of Pharmacology; Institute of Medical Sciences, Shanghai Jiao Tong University School of Medicine; Shanghai 200025 China
| | - Liang Peng
- Department of Pharmacology; Institute of Medical Sciences, Shanghai Jiao Tong University School of Medicine; Shanghai 200025 China
| | - Ying Xie
- Department of Pharmacology; Institute of Medical Sciences, Shanghai Jiao Tong University School of Medicine; Shanghai 200025 China
| | - Xin Luan
- Department of Pharmacology; Institute of Medical Sciences, Shanghai Jiao Tong University School of Medicine; Shanghai 200025 China
| | - Huafang Li
- State base of clinical trial; Shanghai Institute of Mental Health, Shanghai Jiao Tong University School of Medicine; Shanghai 200030 China
| | - Zhengxing Rong
- Department of Pharmacology; Institute of Medical Sciences, Shanghai Jiao Tong University School of Medicine; Shanghai 200025 China
| | - Hong Qi
- Department of Pharmacology; Institute of Medical Sciences, Shanghai Jiao Tong University School of Medicine; Shanghai 200025 China
| | - Hongzhuan Chen
- Department of Pharmacology; Institute of Medical Sciences, Shanghai Jiao Tong University School of Medicine; Shanghai 200025 China
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19
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Kinoshita K, Jingu S, Yamaguchi JI. A surrogate analyte method to determine d-serine in mouse brain using liquid chromatography–tandem mass spectrometry. Anal Biochem 2013; 432:124-30. [DOI: 10.1016/j.ab.2012.09.035] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 09/28/2012] [Accepted: 09/28/2012] [Indexed: 01/06/2023]
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20
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Nam YS, Kwon IK, Lee Y, Lee KB. Quantitative monitoring of corticosteroids in cosmetic products manufactured in Korea using LC–MS/MS. Forensic Sci Int 2012; 220:e23-8. [DOI: 10.1016/j.forsciint.2011.12.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2011] [Revised: 11/28/2011] [Accepted: 12/22/2011] [Indexed: 11/26/2022]
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21
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Yin J, Meng Q. Use of primary rat hepatocytes in the gel entrapment culture to predictin vivobiliary excretion. Xenobiotica 2011; 42:417-28. [DOI: 10.3109/00498254.2011.633716] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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22
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Chao A, Schlinger BA, Remage-Healey L. Combined liquid and solid-phase extraction improves quantification of brain estrogen content. Front Neuroanat 2011; 5:57. [PMID: 21909323 PMCID: PMC3164112 DOI: 10.3389/fnana.2011.00057] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2011] [Accepted: 08/16/2011] [Indexed: 11/13/2022] Open
Abstract
Accuracy in quantifying brain-derived steroid hormones ("neurosteroids") has become increasingly important for understanding the modulation of neuronal activity, development, and physiology. Relative to other neuroactive compounds and classical neurotransmitters, steroids pose particular challenges with regard to isolation and analysis, owing to their lipid solubility. Consequently, anatomical studies of the distribution of neurosteroids have relied primarily on the expression of neurosteroid synthesis enzymes. To evaluate the distribution of synthesis enzymes vis-à-vis the actual steroids themselves, traditional steroid quantification assays, including radioimmunoassays, have successfully employed liquid extraction methods (e.g., ether, dichloromethane, or methanol) to isolate steroids from microdissected brain tissue. Due to their sensitivity, safety, and reliability, the use of commercial enzyme-immunoassays (EIA) for laboratory quantification of steroids in plasma and brain has become increasingly widespread. However, EIAs rely on enzymatic reactions in vitro, making them sensitive to interfering substances in brain tissue and thus producing unreliable results. Here, we evaluate the effectiveness of a protocol for combined, two-stage liquid/solid-phase extraction (SPE) as compared to conventional liquid extraction alone for the isolation of estradiol (E(2)) from brain tissue. We employ the songbird model system, in which brain steroid production is pronounced and linked to neural mechanisms of learning and plasticity. This study outlines a combined liquid-SPE protocol that improves the performance of a commercial EIA for the quantification of brain E(2) content. We demonstrate the effectiveness of our optimized method for evaluating the region specificity of brain E(2) content, compare these results to established anatomy of the estrogen synthesis enzyme and estrogen receptor, and discuss the nature of potential EIA interfering substances.
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Affiliation(s)
- Andrew Chao
- Laboratory of Neuroendocrinology, Department of Integrative Biology and Physiology, Brain Research Institute, University of California Los Angeles Los Angeles, CA, USA
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23
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Zhang M, Moore GA, Jensen BP, Begg EJ, Bird PA. Determination of dexamethasone and dexamethasone sodium phosphate in human plasma and cochlear perilymph by liquid chromatography/tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2011; 879:17-24. [DOI: 10.1016/j.jchromb.2010.11.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2010] [Revised: 11/02/2010] [Accepted: 11/02/2010] [Indexed: 10/18/2022]
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24
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Wang G, Korfmacher WA. Development of a biomarker assay for 3-indoxyl sulfate in mouse plasma and brain by liquid chromatography/tandem mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2009; 23:2061-2069. [PMID: 19504476 DOI: 10.1002/rcm.4111] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This paper describes the development and partial validation of a fast, sensitive and specific ultra-performance liquid chromatography/tandem mass spectrometric method for the determination of 3-indoxyl sulfate (3-IS), an endogenous compound in mammals, in mouse plasma and brain samples. The analytical method involves direct dilution of samples with water and protein precipitation with acetonitrile containing an internal standard, followed by separation of 3-IS on a MonoChrom C(18) column and detected by selected reaction monitoring (SRM) in negative ionization mode using turbo ion-spray ionization. Due to high endogenous levels of 3-IS in control mouse plasma and brain, blank guinea pig plasma and brain were used for the preparation of standard curves and quality controls (QCs). The compound of interest was well separated from interference peaks from the matrices with a total runtime of 2.7 min under a gradient condition. The method was partially validated. The linear concentration range was 0.1 to 100 microg/mL in mouse plasma and 10 to 10,000 ng/g in mouse brain. Inter-assay mean bias and relative standard deviation (RSD) for plasma were in the range of -4.8% to 3.1% and 2.5% to 3.2%, respectively. Intra-assay mean bias and RSD for plasma were in the range of -3.3% to 1.4% and 1.9% to 2.8%, respectively. Inter-assay mean bias and RSD for brain were in the range of -1.8% to 3.5% and 1.7% to 8.1%, respectively. Intra-assay mean bias and RSD for brain were in the range of -1.7% to 3.9% and 4.1% to 7.3%, respectively. The lower limit of quantitation (LLOQ) for this assay was 0.1 microg/mL for plasma and 10 ng/g for brain. The matrix effect was not observed in both guinea pig plasma and mouse plasma.
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Affiliation(s)
- Ganfeng Wang
- Department of Drug Metabolism and Pharmacokinetics, Schering-Plough Research Institute, 2015 Galloping Hill Road, Kenilworth, NJ 07033, USA.
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25
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Yamashita K, Nakagawa R, Okuyama M, Honma S, Takahashi M, Numazawa M. Simultaneous determination of tetrahydrocortisol, allotetrahydrocortisol and tetrahydrocortisone in human urine by liquid chromatography-electrospray ionization tandem mass spectrometry. Steroids 2008; 73:727-37. [PMID: 18394666 DOI: 10.1016/j.steroids.2008.02.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2007] [Revised: 02/16/2008] [Accepted: 02/18/2008] [Indexed: 10/22/2022]
Abstract
Simultaneous quantification method of three major metabolites of cortisone and cortisol, tetrahydrocortisol, allotetrahydrocortisol and tetrahydrocortisone by liquid chromatography-electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS) was investigated in a positive mode using a recently developed picolinyl derivatization. Conversion of each steroid into the corresponding picolinyl derivatives (1b, 2b or 3b) was performed by mixed anhydride method using picolinic acids and 2-methyl-6-nitrobenzoic anhydride. Derivatization proceeded smoothly to afford the corresponding 3, 21-dipicolinyl derivatives. Positive ion-ESI mass spectra of the picolinyl derivatives were dominated by an appearance of [M+H](+) as base peaks in all cases. The picolinyl derivatives provided 15 to 80-fold higher ESI response in the LC-ESI-MS/MS (selected reaction monitoring: SRM) when compared to those of underivatized molecules in a positive LC-ESI mode. The use of the picolinyl ester, solid-phase extraction, and deuterium labeled internal standards enabled the concentrations of these metabolites in human urine to be determined simultaneously by LC-ESI-MS/MS (SRM) with a small sample volume of less than 1microl urine.
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Affiliation(s)
- Kouwa Yamashita
- Faculty of Pharmaceutical Science, Tohoku Pharmaceutical University, Aoba-ku, Sendai, Miyagi 981-8558, Japan.
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26
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Ono M, Kashimada K, Miyai K, Onishi T, Takagi M, Honma S, Mizutani S. In Vitro Enzyme Assay of CYP21A2 Mutation (R483Q) by A Novel Method Using Liquid Chromatography-Electrospray Ionization Tandem Mass Spectrometry (LC-ESI-MS/MS). Clin Pediatr Endocrinol 2008; 17:49-56. [PMID: 24790362 PMCID: PMC4004923 DOI: 10.1297/cpe.17.49] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2007] [Accepted: 01/30/2008] [Indexed: 11/04/2022] Open
Abstract
Congenital adrenal hyperplasia (CAH) is one of the most common autosomal recessive disorders in humans, and 21-hydroxylase deficiency (21-OHD) accounts for 90 to 95% of all cases of CAH. Approximately 95% mutations are a consequence of recombination between the CYP21A2 and its highly homologous pseudogene CYP21A1P. Recently, other rare mutations have been identified, increasing the number of reported mutations to more than eighty. The in vitro enzyme assay for the detection of mutated 21-hydroxylase is a well-established method. In this study, we report the characterization of the R483Q mutation using a novel in vitro enzyme assay, liquid chromatography-electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS). With this system, we evaluated the activity of the R483Q mutation. The enzyme activities of 21-hydroxylase in the convertion of progesterone to deoxycorticosterone (DOC), and 17-hydroxyprogesterone (17-OHP) to 11-deoxycortisol (11-DOF), were measured as 2.00 ± 0.25% and 1.89 ± 0.30% of the wild type, respectively. This result was in agreement with that of a previous report, which measured the activities using the (3)H labeled steroid assay. Our results suggest that the R483Q mutation is compatible with the simple virilizing form of 21-OHD and that the LC-ESI-MS/MS assay using picolinoyl derivatives is an alternative to the existing (3)H-labeled steroid assay for the characterization of the CYP21A2 mutation.
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Affiliation(s)
- Makoto Ono
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kenichi Kashimada
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kentaro Miyai
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan
| | - Toshikazu Onishi
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan
| | - Masatoshi Takagi
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan
| | | | - Shuki Mizutani
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan
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McMaster A, Chambers T, Meng QJ, Grundy S, Loudon ASI, Donn R, Ray DW. Real-time analysis of gene regulation by glucocorticoid hormones. J Endocrinol 2008; 197:205-11. [PMID: 18434350 PMCID: PMC2315692 DOI: 10.1677/joe-07-0639] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Revised: 02/12/2008] [Accepted: 02/27/2008] [Indexed: 11/27/2022]
Abstract
There is increasing evidence that temporal factors are important in allowing cells to gain additional information from external factors, such as hormones and cytokines. We sought to discover how cell responses to glucocorticoids develop over time, and how the response kinetics vary according to ligand structure and concentration, and hence have developed a continuous gene transcription measurement system, based on an interleukin-6 (IL-6) luciferase reporter gene. We measured the time to maximal response, maximal response and integrated response, and have compared these results with a conventional, end point glucocorticoid bioassay. We studied natural glucocorticoids (corticosterone and cortisol), synthetic glucocorticoids (dexamethasone) and glucocorticoid precursors with weak, or absent bioactivity. We found a close correlation between half maximal effective concentration (EC50) for maximal response, and for integrated response, but with consistently higher EC50 for the latter. There was no relation between the concentration of ligand and the time to maximal response. A comparison between conventional end point assays and real-time measurement showed similar effects for dexamethasone and hydrocortisone, with a less effective inhibition of IL-6 seen with corticosterone. We profiled the activity of precursor steroids, and found pregnenolone, progesterone, 21-hydroxyprogesterone and 17-hydroxyprogesterone all to be ineffective in the real-time assay, but in contrast, progesterone and 21-hydroxyprogesterone showed an IL-6 inhibitory activity in the end point assay. Taken together, our data show how ligand concentration can alter the amplitude of glucocorticoid response, and also that a comparison between real-time and end point assays reveals an unexpected diversity of the function of glucocorticoid precursor steroids, with implications for human disorders associated with their overproduction.
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Affiliation(s)
- A McMaster
- Centre for Molecular Medicine, Faculty of Medical and Human SciencesUniversity of ManchesterStopford Building, Manchester, M13 9PTUK
- ARC/EU School of Medicine, Faculty of Medical and Human SciencesUniversity of ManchesterStopford Building, Manchester, M13 9PTUK
| | - T Chambers
- Centre for Molecular Medicine, Faculty of Medical and Human SciencesUniversity of ManchesterStopford Building, Manchester, M13 9PTUK
| | - Q-J Meng
- ARC/EU School of Medicine, Faculty of Medical and Human SciencesUniversity of ManchesterStopford Building, Manchester, M13 9PTUK
| | - S Grundy
- Centre for Molecular Medicine, Faculty of Medical and Human SciencesUniversity of ManchesterStopford Building, Manchester, M13 9PTUK
| | - A S I Loudon
- ARC/EU School of Medicine, Faculty of Medical and Human SciencesUniversity of ManchesterStopford Building, Manchester, M13 9PTUK
| | - R Donn
- Centre for Molecular Medicine, Faculty of Medical and Human SciencesUniversity of ManchesterStopford Building, Manchester, M13 9PTUK
- ARC/EU School of Medicine, Faculty of Medical and Human SciencesUniversity of ManchesterStopford Building, Manchester, M13 9PTUK
| | - D W Ray
- Centre for Molecular Medicine, Faculty of Medical and Human SciencesUniversity of ManchesterStopford Building, Manchester, M13 9PTUK
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Yang Y, Li H, Gao K, Liu M, Sun Y, Yan T, Fawcett JP, Cui Y, Gu J. Simultaneous quantitation of dexamethasone palmitate and dexamethasone in human plasma by liquid chromatography/tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 862:119-24. [PMID: 18164670 DOI: 10.1016/j.jchromb.2007.11.033] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2007] [Revised: 10/24/2007] [Accepted: 11/23/2007] [Indexed: 11/28/2022]
Abstract
A rapid and sensitive liquid chromatography/tandem mass spectrometry (LC/MS/MS) method for simultaneous quantitation of dexamethasone palmitate and dexamethasone in human plasma was developed. After sample preparation by protein precipitation and liquid-liquid extraction, the analytes and internal standard (IS) were separated on a Venusil XBP-C8 column using gradient elution. Multiple reaction monitoring of dexamethasone palmitate, dexamethasone and IS used the precursor to product ion transitions at m/z 631.8-->373.1, m/z 393.2-->147.1 and m/z 264.2-->58.1, respectively. The method was linear over the ranges 1.5-1000ng/mL for dexamethasone palmitate and 2.5-250ng/mL for dexamethasone with intra- and inter-day precisions of <10% and accuracies of 100+/-7%. The assay was applied to a clinical pharmacokinetic study involving the injection of dexamethasone palmitate to healthy volunteers.
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Affiliation(s)
- Yan Yang
- Research Center for Drug Metabolism, College of Life Science, Jilin University, Changchun 130021, PR China
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29
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Yamashita K, Takahashi M, Tsukamoto S, Numazawa M, Okuyama M, Honma S. Use of novel picolinoyl derivatization for simultaneous quantification of six corticosteroids by liquid chromatography-electrospray ionization tandem mass spectrometry. J Chromatogr A 2007; 1173:120-8. [PMID: 17964584 DOI: 10.1016/j.chroma.2007.10.023] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2007] [Revised: 10/05/2007] [Accepted: 10/08/2007] [Indexed: 11/27/2022]
Abstract
Simultaneous quantification method of six corticosteroids, cortisone, cortisol, cortexolone, corticosterone, dehydrocorticosterone and deoxycorticosterone, by LC-electrospray ionization (ESI)-MS in a positive mode using novel picolinoyl derivatization was investigated. Conversion of each corticosteroid into the corresponding picolinoyl derivative was performed by mixed anhydride method using picolinic acids and 2-methyl-6-nitrobenzoic anhydride. Derivatization proceeded smoothly to afford the corresponding 21-monopicolinoyl derivatives. Positive ion-ESI mass spectra of the picolinoyl derivatives were dominated by the appearance of [M+H](+) as base peaks. The picolinoyl derivatives provided 5-10 times higher ESI response in the LC-ESI-MS-selected reaction monitoring (SRM) when compared to those of underivatized molecules in a positive LC-ESI-MS mode. The use of the picolinoyl ester, solid-phase extraction, and deuterium labeled internal standards enabled to determine the concentrations of these corticosteroids in human saliva simultaneously by LC-ESI-MS-SRM.
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Affiliation(s)
- Kouwa Yamashita
- Faculty of Pharmaceutical Science, Tohoku Pharmaceutical University, 4-1 Komatsushima 4-Chome, Aoba-ku, Sendai 981-8558, Japan.
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