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Čupić Ž, Marković VM, Maćešić S, Stanojević A, Damjanović S, Vukojević V, Kolar-Anić L. Dynamic transitions in a model of the hypothalamic-pituitary-adrenal axis. CHAOS (WOODBURY, N.Y.) 2016; 26:033111. [PMID: 27036189 DOI: 10.1063/1.4944040] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Dynamic properties of a nonlinear five-dimensional stoichiometric model of the hypothalamic-pituitary-adrenal (HPA) axis were systematically investigated. Conditions under which qualitative transitions between dynamic states occur are determined by independently varying the rate constants of all reactions that constitute the model. Bifurcation types were further characterized using continuation algorithms and scale factor methods. Regions of bistability and transitions through supercritical Andronov-Hopf and saddle loop bifurcations were identified. Dynamic state analysis predicts that the HPA axis operates under basal (healthy) physiological conditions close to an Andronov-Hopf bifurcation. Dynamic properties of the stress-control axis have not been characterized experimentally, but modelling suggests that the proximity to a supercritical Andronov-Hopf bifurcation can give the HPA axis both, flexibility to respond to external stimuli and adjust to new conditions and stability, i.e., the capacity to return to the original dynamic state afterwards, which is essential for maintaining homeostasis. The analysis presented here reflects the properties of a low-dimensional model that succinctly describes neurochemical transformations underlying the HPA axis. However, the model accounts correctly for a number of experimentally observed properties of the stress-response axis. We therefore regard that the presented analysis is meaningful, showing how in silico investigations can be used to guide the experimentalists in understanding how the HPA axis activity changes under chronic disease and/or specific pharmacological manipulations.
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Affiliation(s)
- Željko Čupić
- Department of Catalysis and Chemical Engineering, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia
| | - Vladimir M Marković
- Faculty of Physical Chemistry, University of Belgrade, Studentski trg 12-16, 11158 Belgrade, Serbia
| | - Stevan Maćešić
- Faculty of Physical Chemistry, University of Belgrade, Studentski trg 12-16, 11158 Belgrade, Serbia
| | - Ana Stanojević
- Faculty of Physical Chemistry, University of Belgrade, Studentski trg 12-16, 11158 Belgrade, Serbia
| | - Svetozar Damjanović
- Institute of Endocrinology, Diabetes and Metabolic Diseases, School of Medicine, University of Belgrade, Dr Subotica 13, 11000 Belgrade, Serbia
| | - Vladana Vukojević
- Department of Clinical Neuroscience, Karolinska Institutet, CMM L8:01, 17176 Stockholm, Sweden
| | - Ljiljana Kolar-Anić
- Department of Catalysis and Chemical Engineering, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia
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Pejić N, Kolar-Anić L, Maksimović J, Janković M, Vukojević V, Anić S. Dynamic transitions in the Bray–Liebhafsky oscillating reaction. Effect of hydrogen peroxide and temperature on bifurcation. REACTION KINETICS MECHANISMS AND CATALYSIS 2016. [DOI: 10.1007/s11144-016-0984-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Budroni MA, Biosa E, Garroni S, Mulas GRC, Marchettini N, Culeddu N, Rustici M. Understanding oscillatory phenomena in molecular hydrogen generation via sodium borohydride hydrolysis. Phys Chem Chem Phys 2013; 15:18664-70. [DOI: 10.1039/c3cp53302f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lu Y, Gao Q, Xu L, Zhao Y, Epstein IR. Oxygen−Sulfur Species Distribution and Kinetic Analysis in the Hydrogen Peroxide−Thiosulfate System. Inorg Chem 2010; 49:6026-34. [DOI: 10.1021/ic100573a] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yongchao Lu
- College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221008, China
| | - Qingyu Gao
- College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221008, China
- Department of Chemistry and Volen Center for Complex Systems, MS 015, Brandeis University, Waltham, Massachusetts 02454-9110
| | - Li Xu
- College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221008, China
| | - Yuemin Zhao
- College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221008, China
| | - Irving R. Epstein
- Department of Chemistry and Volen Center for Complex Systems, MS 015, Brandeis University, Waltham, Massachusetts 02454-9110
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Marchettini N, Antonio Budroni M, Rossi F, Masia M, Liria Turco Liveri M, Rustici M. Role of the reagents consumption in the chaotic dynamics of the Belousov–Zhabotinsky oscillator in closed unstirred reactors. Phys Chem Chem Phys 2010; 12:11062-9. [DOI: 10.1039/c0cp00109k] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Du Z, Gao Q, Feng J, Lu Y, Wang J. Dynamic Instabilities and Mechanism of the Electrochemical Oxidation of Thiosulfate. J Phys Chem B 2006; 110:26098-104. [PMID: 17181263 DOI: 10.1021/jp064312l] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The electrochemical oxidation of thiosulfate is revealed to have two distinct oscillatory regimes in both linear potential and galvanic voltammograms, where various nonlinear behaviors such as period-2, mixed-mode and quasi-periodic oscillations, and chaos are observed under potentiostatic or galvanostatic conditions. Electrochemical impedance spectroscopy and iR compensation characterization indicate that, depending on the operating conditions, the system could be either a strictly potentiostatic oscillator or an S-shaped negative differential resistance oscillator. Chronoamperometry measurements reveal that the first oscillatory process involves a single-electron transfer, whereas within the second oscillatory regime the average number of electrons transferred is around 3.8. Measurements with capillary electrophoresis and chemical methods illustrate that the oxidation products include S2O6(2-), S4O6(2-), S5O6(2-), S3O6(2-), and SO4(2-).
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Affiliation(s)
- Zhanhe Du
- College of Chemical Engineering, China University of Mining and Technology, Xuzhou, Jiangsu Province, 221008, PRC
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Biosa G, Masia M, Marchettini N, Rustici M. A ternary nonequilibrium phase diagram for a closed unstirred Belousov–Zhabotinsky system. Chem Phys 2005. [DOI: 10.1016/j.chemphys.2004.07.050] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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8
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Kalishyn YY, Rachwalska M, Khavrus VO, Strizhak PE. The effect of oxygen on time-dependent bifurcations in the Belousov–Zhabotinsky oscillating chemical reaction in a batch. Phys Chem Chem Phys 2005; 7:1680-6. [DOI: 10.1039/b416006a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Awazu A, Kaneko K. Relaxation to equilibrium can be hindered by transient dissipative structures. PHYSICAL REVIEW LETTERS 2004; 92:258302. [PMID: 15245066 DOI: 10.1103/physrevlett.92.258302] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2003] [Indexed: 05/24/2023]
Abstract
Relaxation processes in a closed chemical reaction-diffusion system which can potentially form Turing-like patterns during the transient are investigated to address the question given by the title. We find that when certain conditions are fulfilled the relaxation process is indeed drastically hindered, once the pattern is formed. This slowing down is shown to be due to stepwise relaxation, where each plateau in the relaxation process corresponds to residence at a certain spatial pattern. Mechanism and universality of the phenomena are discussed.
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Affiliation(s)
- Akinori Awazu
- Department of Pure and Applied Sciences, University of Tokyo, Komaba 3-8-1, Meguro-ku, Tokyo 153-8902, Japan
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Mahara H, Yamaguchi T, Amagishi Y. A numerical study of the decomposition of chemical waves in a closed system. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(99)01351-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Rábai G, Ichiro Hanazaki*. Chaotic pH Oscillations in the Hydrogen Peroxide−Thiosulfate−Sulfite Flow System. J Phys Chem A 1999. [DOI: 10.1021/jp991600r] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gyula Rábai
- Institute of Physical Chemistry, Kossuth Lajos University, H-4010 Debrecen, Hungary
| | - Ichiro Hanazaki*
- Department of Chemistry, Faculty of Science, Hiroshima University, Kagamiyama, Higashi-Hiroshima 739-8526, Japan
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Rustici M, Caravati C, Petretto E, Branca M, Marchettini N. Transition Scenarios during the Evolution of the Belousov−Zhabotinsky Reaction in an Unstirred Batch Reactor. J Phys Chem A 1999. [DOI: 10.1021/jp9902708] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mauro Rustici
- Università di Sassari, Dipartimento di Chimica, Via Vienna 2, 07100 Sassari, Italia
| | - Carlo Caravati
- Università di Sassari, Dipartimento di Chimica, Via Vienna 2, 07100 Sassari, Italia
| | - Enrico Petretto
- Università di Sassari, Dipartimento di Chimica, Via Vienna 2, 07100 Sassari, Italia
| | - Mario Branca
- Università di Sassari, Dipartimento di Chimica, Via Vienna 2, 07100 Sassari, Italia
| | - Nadia Marchettini
- Università di Sassari, Dipartimento di Chimica, Via Vienna 2, 07100 Sassari, Italia
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Rustici M, Branca M, Brunetti A, Caravati C, Marchettini N. Inverse Ruelle–Takens–Newhouse scenario in a closed unstirred cerium-catalysed Belousov–Zhabotinsky system. Chem Phys Lett 1998. [DOI: 10.1016/s0009-2614(98)00781-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Crouch SR, Cullen TF, Scheeline A, Kirkor ES. Kinetic Determinations and Some Kinetic Aspects of Analytical Chemistry. Anal Chem 1998. [DOI: 10.1021/a1980005s] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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