2005, Número 3
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Arch Neurocien 2005; 10 (3)
Efectos favorables de la piridoxina y el ácido fólico administredosa shr-sp
Perez SC, Vianna LM
Idioma: Ingles.
Referencias bibliográficas: 24
Paginas: 146-149
Archivo PDF: 60.83 Kb.
RESUMEN
La homocisteina se ha asociado a la enfermedad vascular cerebral (EVC), que realza el interés para la investigación sobre el papel de las vitaminas implicadas en su metabolismo. Ratas Spontaniously Hypertensive Stronke-Prone Rats SHRSP fueron tratados con piridoxina y el ácido fólico en las dosis correspon-dientes a cinco, diez y veinte veces sus necesidades alimenticias. La presión arterial sistólica y los parámetros generales fueron analizados y comparados al grupo de control. Los correspondientes de las dosis a 10 y 20 veces RDA promovieron un efecto hipotenso, pero los concernientes a las dosis a 5 veces, no. Los animales tratados en 190 días de la edad presentaron una reducción significativa de la presión arterial sistólica cuando está comparado al grupo de control. Los ani-males bajo tratamiento no presentaron las muestras de enfermedad cerebral detectadas naturalmente en ese acoplamiento. Nuestros resultados sugieren que las vitaminas B6 y B9 podrían ser beneficiosas para la terapia preventiva del EVC.
REFERENCIAS (EN ESTE ARTÍCULO)
Lenzi GL, Franckowiak RSJ, Jones T. Cerebral oxygen metabolism and blood flow in human cerebral ischemic infarction. J Cereb Blood Flow Metab 1982; 2:321-35.
Gibbs JM, Frackowiak RSJ, Legg NJ. Regional cerebral blood flow and oxygen metabolism in dementia due to vascular disease. Gerontology 1986; (suppl1) 32: 84-88.
Williams GR, Jiang JG, Matchan DB, Samsa GP. Incidence and occurrence of total (first- ever and recurrent) stroke. Stroke 1999; 30: 2523-8.
Chan PH. Reactive oxygen radicals in signaling and damage in the ischemic brain. J Cereb Blood Flow Metab 2001; 21: 2-14.
Chan PH. Oxygen radicals in focal cerebral ischemia. Brain Pathol 1994; 4: 59-65.
Choi DW. Calcium- mediated neurotoxicity: relationship to specifie channel types and role in ischemic damage. Trends Neurosci 1988; 11: 465-9.
Bulkley GB. Free radical mediated reperfusion injury. A selective review. Br J Cancer 1987; 55 (Suppl VIII): 66-73.
Tanne D, Haim M, Goldbourt U. Prospective study of serum homocysteine and risk of ischemic stroke among patients with preexisting coronary heart disease. Stroke 2003; 34: 632-6.
Homocysteine studies collaboration. Homocysteine and risk of ischemic heart disease and stroke: a metanalysis. JAMA 2002; 288: 2015-22.
Sutton–Tyrrell K, Boston A, Selhub J, Zeigler–Johnson C. High homocysteine levels are independently related to isolated systolic hypertension in older adults. Circulation 1997; 96: 1745-9.
Fiorina P, Lanfredini M, Montanari A. Plasma homocysteine and folate are related to arterial blood pressure in type 2 diabetes mellitus. Am J Hypertens 1998; 11: 1100-7
Stehouwer CD, van Guldener C. Does homocysteine cause hypertension? Clin Chem Lab Med 2003; 41(11):1408-11.
McCully KS. Vascular pathology of homocysteinemia: implications for the pathogenesis of arterioslerosis. Am J Pathol 1969; 56: 111-28.
Welch GN, Upchurch G Jr, Loscalzo J. Hyperhomocy-st(e)ine-mia and atherotrombosis. Ann N Y Acad Sci. 1997; 811: 48-58.
Farace FM, Lentz SR. Hyperhomocysteinemia, oxidative stress and cerebrovascular dysfunction. Stroke 2004; 35: 345-7.
Cuskelly GJ, Stacpoole PW, Williamson J, Baumartner TG, Gregory JF. Deficiencies of folate and vitamin B6 exert distinct effects on homocysteine, serine and methionine kinetics. Am J Physiol Endocrinol Metab 2001; 281(6): E1182-90.
Robinson K, Arheart K, Refsum H, Brattstrom L, Boers G, Ueland P, et al. Low circulating folate and vitamin B6 concentrations: risk factors for stroke, peripheral vascular disease, and coronary artery disease: European COMAC Group. Circulation.1998; 97: 437-43.
Teixeira F, Mizurinni D, Vianna LM. Pyridoxine and folic acid combined therapy provides the best fisiologic response. Ann Nutrition Metabolism 2003;47: 563-4.
Okamoto K, Y. Nagaoka A. Establishment of the stroke prone spontaneously hypertensive rat. Circulation Res 1974; 34-45: supl 1 143-53.
Purcell, JE, Lenhardt, SC, White, RF, Schaeffer, T, Barone, FC, Chandra, S. Strain-dependent response to cerebral ischemic preconditioning: differences between spontaneously hyper-tensive and stroke prone spontaneously hypertensive rats. Neuroscience Letters. 2003; 339: 151-5.
Yen CH, Lau YT. Vascular responses in male and female hypertensive rats with hyperhomocysteinemia. Hypertension 2002; 40: 322-8.
Dietary vitamin B6 supplementation attenuates hypertension in spontaneously hypertensive rats. Mole Cell Biochem 1999, 200: 155-62.
Nakiba T, Cui Z, Masuda J. The stroke prone spontaneously Hypertensive Rat: How good is it as a model for cerebrovascular diseases. Cell Mol Neurobiol 2004, 24(5): 639-44.
Vianna LM, Wandenboer H, Batista KM, Silva F, Mizurinni D. Toxicidade da piridoxina observada em SHR idosos. Rev Cient Cent Univ Barra Mansa–UBM, Barra Mansa 2001; 3(6): 34-9.