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Infecção Relacionada com o CVC
Neto, MT; Queiroz, G; Serelha, MIntrodução: Os dispositivos invasivos nomeadamente cateteres venosos centrais (CVC) são uma fonte comum de infecção sistémica. Em cuidados intensivos neonatais a taxa de infecção associada ao CVC pode ser muito elevada. A vigilância epidemiológica constitui a base do controlo de infecção associada a estes dispositivos. Objectivo: Analisar a evolução da infecção associada aos CVC numa UCIN. Tipo de estudo: Vigil...
OPPOSITE MODULATION OF ASTROGLIAL PROLIFERATION BY ADENOSINE 5 -O-(2-THIO)-DIPH...
Quintas, C.; Fraga, S.; Goncalves, J.; Queiroz, G.The contribution of P2Y(12,13) receptors to astroglial proliferation was investigated by testing the effects of two agonists with high affinity for these receptors, adenosine 5-O-(2-thio)-diphosphate (ADP beta S) and 2-methylthioadenosine-5-diphosphate (2-MeSADP), in the incorporation of [(3)H]-thymidine. The effect of ATP, an endogenous inducer of astroglial proliferation, was also investigated. ADP beta S and...
The P2Y(1) and P2Y(12) receptors mediate autoinhibition of transmitter release ...
Quintas, C; Fraga, S; Gonçalves, J; Queiroz, GIn the sympathetic nervous system, ATP is a co-transmitter and modulator of transmitter release, inhibiting noradrenaline release by acting on P2Y autoreceptors, but in peripheral tissues the subtypes involved have only scarcely been identified. We investigated the identity of the noradrenaline release-inhibiting P2Y subtypes in the epididymal portion of vas deferens and tail artery of the rat. The subtypes ope...
Uso do propofol na indução anestésica de cutias (Dasyprocta sp.)
Leite,W.P.; Barrêto Júnior,R.A.; Queiroz,G.F.; Paula,V.V.Avaliou-se o emprego do propofol, por via intravenosa, como agente indutor anestésico em cutias (Dasyprocta sp), utilizando-se 10 fêmeas adultas, com pesos entre 1,5 a 2,0kg, criadas em cativeiro. Avaliaram-se as freqüências cardíaca e respiratória, a temperatura retal e a pressão arterial sistólica, antes da administração do propofol e logo após a anestesia dos animais. Foram mensurados o período hábil e de re...
Interaction between adenosine A(2B)-receptors and alpha(2)-adrenoceptors on the...
Talaia, C; Queiroz, G; Quintas, C; Gonçalves, JIn the prostatic portion of rat vas deferens, activation of adenosine A(2B)-receptors, beta(2)-adrenoceptors, adenylyl cyclase or protein kinase A caused a facilitation of noradrenaline release. Blockade of alpha(2)-adrenoceptors with yohimbine (1 mu M) attenuated the facilitation mediated by adenosine A(2B)-receptors and by direct activation of adenylyl cyclase with forskolin but not that mediated by beta(2)-a...
Coupling to protein kinases A and C of adenosine A(2B) receptors involved in th...
Queiroz, G; Quintas, C; Talaia, C; Gonçalves, JIn the prostatic portion of rat vas deferens, the non-selective adenosine receptor agonist NECA (0.1-30 muM), but not the A(2A) agonist CGS 21680 (0.001-10 muM), caused a facilitation of electrically evoked noradrenaline release (up to 43 +/- 4%), when inhibitory adenosine A(1) receptors were blocked. NECA-elicited facilitation of noradrenaline release was prevented by the A,B receptor-antagonist MRS 1754, enha...
Effect of pinealectomy, adrenalectomy, pinealectomy plus adrenalectomy upon the...
Castro,A.C.S.; Queiroz,G.F.; Nogueira,J.C.; Coimbra,C.C.; Reis,A.M.; Marubayashi,U.; Yamasaki,K.The objectives of this study were to evaluate the effects of pinealectomy, adrenalectomy and pinealectomy-adrenalectomy upon the quantification of spermatogenic cells of rats. As such, 32 adult Wistar rats with a mean body weight of 331.7± 15.5g were assigned into one of the following treatments: (a) a sham-operated control group, consisting of nine animals; (b) ten pinealectomized animals; (c) seven adrenalect...
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