BACKGROUND AND AIMS: A positive correlation between intake of antioxidants including vitamins E and C on bone mass has been established by a number of investigators. The present study was conducted to evaluate the extent to which higher doses of vitamin E than normal dose (75 IU per kg diet) can reverse bone loss in aged osteopenic orchidectomized male rats. METHODS: Forty 12-month old male Sprague- Dawley rats were either sham-operated (Sham) or orchidectomized (Orx), and fed control diet for 120 days to establish bone loss. Thereafter, rats were assigned to their corresponding treatment groups (n= 10 per group): Sham and one Orx groups received 75 IU vitamin E and served as controls, and the other two Orx groups received either 250 or 500 IU vitamin E per kg diet for 90 days. RESULTS: Higher doses of vitamin E did not improve bone mineral density (BMD) or content (BMC) of whole body, femur and lumbar vertebra or alter the orchidectomy-induced deterioration of trabecular microarchitecture of the distal femur metaphysis in comparison with Orx controls that received adequate vitamin E. Biochemical markers of bone formation and bone resorption, i.e. serum osteocalcin and urinary deoxypyridinoline crosslinks, were also unaffected by vitamin E supplementation. CONCLUSIONS: Overall, the findings of the present study suggest that supplemental doses of vitamin E do not increase BMD values in male rat model of osteoporosis. However, human studies are needed to confirm the population findings indicating that individuals with higher vitamin E intake have higher bone mass.
BACKGROUND AND AIMS: A positive correlation between intake of antioxidants including vitamins E and C on bone mass has been established by a number of investigators. The present study was conducted to evaluate the extent to which higher doses of vitamin E than normal dose (75 IU per kg diet) can reverse bone loss in aged osteopenic orchidectomized male rats. METHODS: Forty 12-month old male Sprague- Dawley rats were either sham-operated (Sham) or orchidectomized (Orx), and fed control diet for 120 days to establish bone loss. Thereafter, rats were assigned to their corresponding treatment groups (n= 10 per group): Sham and one Orx groups received 75 IU vitamin E and served as controls, and the other two Orx groups received either 250 or 500 IU vitamin E per kg diet for 90 days. RESULTS: Higher doses of vitamin E did not improve bone mineral density (BMD) or content (BMC) of whole body, femur and lumbar vertebra or alter the orchidectomy-induced deterioration of trabecular microarchitecture of the distal femur metaphysis in comparison with Orx controls that received adequate vitamin E. Biochemical markers of bone formation and bone resorption, i.e. serum osteocalcin and urinary deoxypyridinoline crosslinks, were also unaffected by vitamin E supplementation. CONCLUSIONS: Overall, the findings of the present study suggest that supplemental doses of vitamin E do not increase BMD values in male rat model of osteoporosis. However, human studies are needed to confirm the population findings indicating that individuals with higher vitamin E intake have higher bone mass.
Authors: Mercedes Montero; Manuel Díaz-Curiel; David Guede; Jose Ramón Caeiro; Marta Martín-Fernández; Mercedes Rubert; Daisy Navarro; Concepción de la Piedra Journal: J Osteoporos Date: 2012-10-04
Authors: Isa Naina Mohamed; Boekhtiar Borhanuddin; Ahmad Nazrun Shuid; Nur Farhana Mohd Fozi Journal: Evid Based Complement Alternat Med Date: 2012-10-17 Impact factor: 2.629
Authors: Rafaela G Feresin; Sarah A Johnson; Marcus L Elam; Jeong-Su Kim; Dania A Khalil; Edralin A Lucas; Brenda J Smith; Mark E Payton; Mohammed P Akhter; Bahram H Arjmandi Journal: J Osteoporos Date: 2013-09-05
Authors: Arianna B Lovati; Marta Bottagisio; Susanna Maraldi; Martina B Violatto; Monica Bortolin; Elena De Vecchi; Paolo Bigini; Lorenzo Drago; Carlo L Romanò Journal: Clin Orthop Relat Res Date: 2018-06 Impact factor: 4.176