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Effects of Vitamin E on Receptor Activator of Nuclear Factor Kappa B Ligand (RANKL) and Osteoprotegerin (OPG) in Rats Treated With Nicotine

Norazlina M., and Maizatul-Neza J., and Azarina A., and Nazrun A.S., and Norliza M., and Ima-Nirwana S., (2010) Effects of Vitamin E on Receptor Activator of Nuclear Factor Kappa B Ligand (RANKL) and Osteoprotegerin (OPG) in Rats Treated With Nicotine. Medical Journal of Malaysia, 65 (1). pp. 14-17. ISSN 0300-5283

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Official URL: http://www.e-mjm.org/2010/v65n1/Effects_of_Vitamin_E.pdf

Affiliations

Universiti Kebangsaan Malaysia, Faculty of Medicine
Universiti Kebangsaan Malaysia, Faculty of Allied Health Sciences
Universiti Kebangsaan Malaysia, Faculty of Allied Health Sciences
Universiti Kebangsaan Malaysia, Faculty of Medicine
Universiti Kebangsaan Malaysia, Faculty of Medicine
Universiti Kebangsaan Malaysia, Faculty of Medicine

Abstract

Vitamin E is found to reverse the effects of nicotine on bone and this study aimed to determine its mechanism. Male Sprague Dawley rats were divided into four groups and treated for 3 months: Group 1 was the control group (RC). Groups 2 (N), 3 (N+TT) and 4 (N+ATF) received nicotine 7 mg/kg throughout the treatment period. In addition, groups 3 and 4 received tocotrienol 60 mg/kg and -tocopherol 60 mg/kg respectively during months 2 and 3. Parameters measured were serum osteoprotegerin (OPG), serum receptor activator of nuclear factor kappa B ligand (RANKL), femoral and lumbar bone calcium content and body weight. Nicotine did not affect OPG or RANKL levels but reduced bone calcium content suggesting the calcium loss is not due to increase osteoclastogenesis. OPG was increased in N+ATF while RANKL was slightly increased in N+TT. Both vitamin E supplements restored bone calcium loss induced by nicotine. Nicotine impaired weight gain in all treatment groups starting week 4 however, N+TT group was comparable to RC from week 6 onwards. Bone protective effects of ATF, but not TT, may be partly due to inhibition of osteoclastogenesis.

Item Type:Journal
Keywords:Nicotine, Vitamin E, Osteoprotegerin, RANKL ligand, Rats
Subjects:R Medicine, Dentistry, Pharmacy, Nursing
ID Code:11316

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