We investigated the effect of antioxidant N-acetylcysteine (NAC) on adrenocorticotropic hormone (ACTH)-hypertension. Male Sprague-Dawley rats received NAC (10 mg/L) or water 4 days before ACTH/saline treatment for 13 days (prevention study). In a reversal study, NAC commenced on day 8 of ACTH/saline treatment and continued for 5 days. ACTH increased systolic blood pressure (SBP) in water drinking rats (111 +/- 1 to 131 +/- 3 mmHg, p < 0.001). In the prevention study, NAC + ACTH increased SBP (108 +/- 2 to 120 +/- 2 mmHg, p < 0.001) but less than ACTH alone (p' < 0.05). In the reversal study, NAC had no significant effect (132 +/- 4 to 124 +/- 3 mmHg, ns). Thus, NAC partially prevented but did not reverse ACTH-induced hypertension.
Introducción: Varias enfermedades autoinmunes pueden ir acompañadas de disfunción de las glándulas salivales, independientemente de la presencia o ausencia de asociación con el síndrome de Sjögren (SS). Un estudio reciente de Maeshima y sus colegas hallaron hiposecreción salival en el 58,3% de los pacientes con diversas enfermedades del tejido conectivo, particularmente la esclerosis sistémica (SSc).
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