alexa Two-kidney, two clip renovascular hypertensive rats can be used as stroke-prone rats.
Materials Science

Materials Science

Journal of Nanomedicine & Nanotechnology

Author(s): Zeng J, Zhang Y, Mo J, Su Z, Huang R

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Abstract BACKGROUND AND PURPOSE: The cerebrovascular lesions in stroke-prone spontaneously hypertensive rats are not only dependent on high blood pressure but partly related to pressure-independent genetic factors. The aim of the present study was to observe whether spontaneous stroke occurred in renovascular hypertensive rats without a genetic deficiency. METHODS: The 1-kidney, 1 clip (1k1c); 2-kidney, 1 clip (2k1c); and 2-kidney, 2 clip (2k2c) methods were used to induce hypertension in male Sprague-Dawley rats with a ring-shaped silver clip. Sham-operated rats were used as controls. Blood pressure and neurological symptoms were observed in the rats without any artificial inducement. Brain sections stained with hematoxylin-eosin and phosphotungstic acid-hematoxylin were examined under a microscope to determine stroke foci. RESULTS: The attack rate of stable hypertension was 100\% (55/55) in the 2k2c group, which was significantly higher than that in the 1k1c (23/30, 76.7\%) and 2k1c (21/30, 70\%) groups (P<0.01). None of the rats in the 2k2c group died of acute renal failure or suffered from diffuse cerebral lesions postoperatively. Forty weeks after renal artery constriction, the incidence of spontaneous stroke in the 2k2c group was 61.8\% (34/55), which was significant higher than that in the 1k1c (7/30, 23.3\%) and 2k1c (5/30,16.7\%) groups (P<0.01). Stroke foci were not observed in normotensive controls. CONCLUSIONS: We conclude that 2k2c renovascular hypertensive rats with proper renal artery constriction can be used as stroke-prone renovascular hypertensive rats independent of a genetic deficiency.
This article was published in Stroke and referenced in Journal of Nanomedicine & Nanotechnology

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