2022
DOI: 10.1055/s-0041-1741023
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Histomorfometria da microarquitetura óssea em ratas tratadas com vitamina D e bisfosfonato no manejo da osteoporose

Abstract: Resumo Objetivo Verificar como a administração conjunta de alendronato de sódio (ALN) e vitamina D3 (VD) atua na microarquitetura óssea em ratas com osteoporose induzida por glicocorticoide. Métodos O experimento utilizou 32 ratas da linhagem Wistar, com peso médio de 300 a 400g, com 90 dias de vida. A indução da osteoporose consistiu na administração de dexametasona na dose de 7,5 mg/kg de peso corporal, por via intramuscular, 1 vez por semana durante 5 semanas, à exceção dos animais do gr… Show more

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“…Most studies have been performed on animals; their results are ambiguous and concern only the effect of vitamin D. Earlier results on rats indicated that alfacalcidol, an analogue of vitamin D, improves both trabecular and cortical sites of bone [ 28 ]. The latest studies on rats indicated that vitamin D alone, without the support of medications for osteoporosis, is not effective in improving trabecular bone [ 5 ]. The latest human study showed a supportive effect of vitamin D on the trabecular structure in young adults, indicating an association between low vitamin D and poorer bone microarchitecture and bone strength.…”
Section: Discussionmentioning
confidence: 99%
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“…Most studies have been performed on animals; their results are ambiguous and concern only the effect of vitamin D. Earlier results on rats indicated that alfacalcidol, an analogue of vitamin D, improves both trabecular and cortical sites of bone [ 28 ]. The latest studies on rats indicated that vitamin D alone, without the support of medications for osteoporosis, is not effective in improving trabecular bone [ 5 ]. The latest human study showed a supportive effect of vitamin D on the trabecular structure in young adults, indicating an association between low vitamin D and poorer bone microarchitecture and bone strength.…”
Section: Discussionmentioning
confidence: 99%
“…The primary role of vitamin D is to maintain calcium homeostasis in serum, which is crucial for a multitude of metabolic activities, e.g., neuromuscular function [ 4 , 5 ]. Vitamin D enhances the efficiency of intestinal calcium absorption, stimulates the mobilization of calcium stores from bone tissue [ 6 ], and conserves them from urine (the reabsorption of Ca in the kidney) [ 7 ].…”
Section: Introductionmentioning
confidence: 99%
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