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A Multifactorial Approach to Blood Pressure Control: The Role of the Asymmetrical Organization of the Nervous System (pp.39-64) $100.00
Authors:  (M. Ramírez, I. Banegas, A.B. Segarra, R. Wangesteen, M. de Gasparo, F. Vives, F. Alba, I. Prieto, Unit of Physiology, Department of Health Sciences, University of Jaén, Spain, and others)
Abstract:
If it is well-known that the renin-angiotensin system (RAS) participates
in the regulation of blood pressure (BP) through the binding of Ang II to the
AT1 receptor, other multiple factors of this and additional systems interact
together to maintain the BP in physiologic conditions. The imbalance
between these factors will lead to alterations of BP. Therefore, instead of
studying isolated factors controlling BP, it is indicated to investigate the
equilibrium or interaction between factors with opposite effects. Brain
aminopeptidases participate in the enzymatic cascade of the RAS and play a
major role in BP control and cardiovascular function. Brain asymmetries in
enzymatic activities controlling RAS, as observed in animal models of
hemiparkinsonism, affect the autonomic innervation of the vessels. The
interaction between several active peptides of the RAS such as Ang III, Ang
IV, Ang 2-10 as well as between them and other factors such as dopamine
and nitric oxide appears of importance to control BP. Moreover, the
asymmetry in the function of the nigrostriatal system reflected by differential
peripheral changes should be considered to understand the physiopathology
of hypertension. The present chapter consider the spatial pattern of
aminopeptidase activities in normotensive and spontaneously hypertensive
rats, the variations in activity in the brain and in plasma after unilateral
lesions and the consequences of those lesions on nitric oxide concentration
and blood pressure level. The importance of the central/peripheral
asymmetries is discussed in a bilateral perspective. 


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A Multifactorial Approach to Blood Pressure Control: The Role of the Asymmetrical Organization of the Nervous System (pp.39-64)