Open Access

Homeostasis and the concept of ‘interstitial fluids hierarchy’: Relevance of cerebrospinal fluid sodium concentrations and brain temperature control (Review)

  • Authors:
    • Luigi F. Agnati
    • Manuela Marcoli
    • Giuseppina Leo
    • Guido Maura
    • Diego Guidolin
  • View Affiliations

  • Published online on: February 3, 2017     https://doi.org/10.3892/ijmm.2017.2874
  • Pages: 487-497
  • Copyright: © Agnati et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

In this review, the aspects and further developments of the concept of homeostasis are discussed also in the perspective of their possible impact in the clinical practice, particularly as far as psychic homeostasis is concerned. A brief historical survey and comments on the concept of homeostasis and allostasis are presented to introduce our proposal that is based on the classical assumption of the interstitial fluid (ISF) as the internal medium for multicellular organisms. However, the new concept of a hierarchic role of ISF of the various organs is introduced. Additionally, it is suggested that particularly for some chemico‑physical parameters, oscillatory rhythms within their proper set‑ranges should be considered a fundamental component of homeostasis. Against this background, we propose that the brain ISF has the highest hierarchic role in human beings, providing the optimal environment, not simply for brain cell survival, but also for brain complex functions and the oscillatory rhythms of some parameters, such as cerebrospinal fluid sodium and brain ISF pressure waves, which may play a crucial role in brain physio‑pathological states. Thus, according to this proposal, the brain ISF represents the real internal medium since the maintenance of its dynamic intra-set-range homeostasis is the main factor for a free and independent life of higher vertebrates. Furthermore, the evolutionary links between brain and kidney and their synergistic role in H2O/Na balance and brain temperature control are discussed. Finally, it is surmised that these two interrelated parameters have deep effects on the Central Nervous System (CNS) higher integrative actions such those linked to psychic homeostasis.
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March-2017
Volume 39 Issue 3

Print ISSN: 1107-3756
Online ISSN:1791-244X

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Spandidos Publications style
Agnati LF, Marcoli M, Leo G, Maura G and Guidolin D: Homeostasis and the concept of ‘interstitial fluids hierarchy’: Relevance of cerebrospinal fluid sodium concentrations and brain temperature control (Review). Int J Mol Med 39: 487-497, 2017.
APA
Agnati, L.F., Marcoli, M., Leo, G., Maura, G., & Guidolin, D. (2017). Homeostasis and the concept of ‘interstitial fluids hierarchy’: Relevance of cerebrospinal fluid sodium concentrations and brain temperature control (Review). International Journal of Molecular Medicine, 39, 487-497. https://doi.org/10.3892/ijmm.2017.2874
MLA
Agnati, L. F., Marcoli, M., Leo, G., Maura, G., Guidolin, D."Homeostasis and the concept of ‘interstitial fluids hierarchy’: Relevance of cerebrospinal fluid sodium concentrations and brain temperature control (Review)". International Journal of Molecular Medicine 39.3 (2017): 487-497.
Chicago
Agnati, L. F., Marcoli, M., Leo, G., Maura, G., Guidolin, D."Homeostasis and the concept of ‘interstitial fluids hierarchy’: Relevance of cerebrospinal fluid sodium concentrations and brain temperature control (Review)". International Journal of Molecular Medicine 39, no. 3 (2017): 487-497. https://doi.org/10.3892/ijmm.2017.2874