António Albino-Teixeira

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The continuous infusion for 7 days of the adenosine receptor antagonist 1,3-dipropyl-8-sulfophenylxanthine (DPSPX) causes a sustained hypertension in rats, with an enhancement of sympathetic neurotransmission and activation of the renin-angiotensin system. We studied the involvement of the caudal ventrolateral medulla in the establishment of this(More)
The effect of lesioning the lateral portion of the caudal ventrolateral medullary reticular formation (VLMIat) on the noxious-evoked expression of the c-fos proto-oncogene in spinal neurons, was studied in short-term hypertensive rats. Occlusion of the renal artery for 96 h in unlesioned animals induced a 52% increase in blood pressure (BP) and a 66%(More)
Nociceptive transmission from the spinal cord is controlled by supraspinal pain modulating systems that include the caudal ventrolateral medulla (CVLM). The neuropeptide angiotensin II (Ang II) has multiple effects in the CNS and at the medulla oblongata. Here we evaluated the expression of angiotensin type 1 (AT(1)) receptors in spinally-projecting CVLM(More)
The endogenous pain control system is composed of multiple functionally distinct brain regions, which are thought to integrate nociceptive information with various brain functions. The clear involvement of some pain control centres in cardiovascular modulation has been claimed as a strong indication of their role in nociceptive-cardiovascular integration.(More)
The caudal ventrolateral medulla (CVLM) is a key component of the supraspinal pain modulatory system. Pain modulation from the CVLM is partially relayed by spinally projecting noradrenergic neurons of the pontine A(5) cell group, which leave collateral fibres at the CVLM. The injection of angiotensin II (Ang II) into the CVLM was recently shown to induce(More)
The effect of hypertension on spinal induction of the c-fos proto-oncogene following noxious mechanical stimulation of the skin was studied in the rat. The occlusion of renal artery raised blood pressure steeply, reaching 52% over initial values. Oral administration of NG-nitro-L-arginine methyl ester provoked a gradual increase in blood pressure which(More)
Increased angiotensin II (ANG II) or adenosine can potentiate each other in the regulation of renal hemodynamics and tubular function. Diabetes is characterized by hyperfiltration, yet the roles of ANG II and adenosine receptors for controlling baseline renal blood flow (RBF) or tubular Na(+) handling in diabetes is presently unknown. Accordingly, the(More)
OBJECTIVE To investigate the influence of anxiety, social anxiety and depressive symptoms on the willingness of healthy subjects to volunteer for phase I studies and to report adverse events. MATERIALS AND METHODS A group of healthy subjects who had never participated in a clinical trial ("Naïve Subjects") were invited to participate in a phase I study.(More)
OBJECTIVE To test the hypothesis that trait-curiosity and perceived self-efficacy influence the willingness of healthy subjects to volunteer for participation in Phase I studies. MATERIALS AND METHODS A group of healthy subjects who had never participated in clinical studies ("index group") were invited to participate in a Phase I study. They were(More)
BACKGROUND Diabetes and hypertension independently contribute to renal injury, and the major mechanisms involved are increased reactive oxygen species (ROS) bioavailability and renin-angiotensin system (RAS) activation. We investigated the role of adenosine in controlling ROS production and RAS activation associated with renal dysfunction in hypertension(More)