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Dose effects of propranolol on cancellous and cortical bone in ovariectomized adult rats.
J Pharmacol Exp Ther. 2006 Sep; 318(3):1118-27.JP

Abstract

Animal studies suggest that bone remodeling is under beta-adrenergic control via the sympathetic nervous system. The purpose of this study was to examine the preventive effect of different doses of nonspecific beta-blockers (propranolol) on trabecular and cortical bone envelopes in ovariectomized rats. Six-month-old female Wistar rats were ovariectomized (OVX, n = 60) or sham-operated (n = 15). Then, OVX rats were subcutaneously injected with 0.1 (n = 15), 5 (n = 15), or 20 (n = 15) mg/kg propranolol or vehicle (n = 15) for 10 weeks. Tibial and femoral bone mineral density (BMD) were analyzed longitudinally by dual-energy X-ray absorptiometry. At death, the left tibial metaphysis and L(4) vertebrae were removed, and microcomputed tomography (Skyscan 1072; Skyscan, Aartselaar, Belgium) was performed for trabecular bone structure investigation. Histomorphometry analysis was performed on the right proximal tibia to assess bone cell activities. After 10 weeks, OVX rats had decreased BMD and trabecular parameters and increased bone turnover, as well as cortical porosity compared with the sham group (p < 0.001). Bone architecture alteration was preserved by 0.1 mg/kg propranolol due to higher trabecular number and thickness (+50.35 and +6.81%, respectively, than OVX; p < 0.001) and lower cortical pore number (-52.38% than OVX; p < 0.001). Animals treated by 0.1 mg/kg propranolol had a lower osteoclast surface and a higher osteoblast activity compared with OVX. Animals treated by 20 mg of propranolol did not significantly differ from OVX rats. Animals treated by 5 mg of propranolol have been partially preserved from the ovariectomy. These results showed a dose effect of beta-blockers. The lower the dose of propranolol breeding, the better the preventive effect against ovariectomy.

Authors+Show Affiliations

Institut National de la Santé et de la Recherche Médicale U658, Hospital Regional d'Orléans, France. nicolas.bonnet15@wanadoo.frNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

16740619

Citation

Bonnet, N, et al. "Dose Effects of Propranolol On Cancellous and Cortical Bone in Ovariectomized Adult Rats." The Journal of Pharmacology and Experimental Therapeutics, vol. 318, no. 3, 2006, pp. 1118-27.
Bonnet N, Laroche N, Vico L, et al. Dose effects of propranolol on cancellous and cortical bone in ovariectomized adult rats. J Pharmacol Exp Ther. 2006;318(3):1118-27.
Bonnet, N., Laroche, N., Vico, L., Dolleans, E., Benhamou, C. L., & Courteix, D. (2006). Dose effects of propranolol on cancellous and cortical bone in ovariectomized adult rats. The Journal of Pharmacology and Experimental Therapeutics, 318(3), 1118-27.
Bonnet N, et al. Dose Effects of Propranolol On Cancellous and Cortical Bone in Ovariectomized Adult Rats. J Pharmacol Exp Ther. 2006;318(3):1118-27. PubMed PMID: 16740619.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dose effects of propranolol on cancellous and cortical bone in ovariectomized adult rats. AU - Bonnet,N, AU - Laroche,N, AU - Vico,L, AU - Dolleans,E, AU - Benhamou,C L, AU - Courteix,D, Y1 - 2006/06/01/ PY - 2006/6/3/pubmed PY - 2006/10/13/medline PY - 2006/6/3/entrez SP - 1118 EP - 27 JF - The Journal of pharmacology and experimental therapeutics JO - J Pharmacol Exp Ther VL - 318 IS - 3 N2 - Animal studies suggest that bone remodeling is under beta-adrenergic control via the sympathetic nervous system. The purpose of this study was to examine the preventive effect of different doses of nonspecific beta-blockers (propranolol) on trabecular and cortical bone envelopes in ovariectomized rats. Six-month-old female Wistar rats were ovariectomized (OVX, n = 60) or sham-operated (n = 15). Then, OVX rats were subcutaneously injected with 0.1 (n = 15), 5 (n = 15), or 20 (n = 15) mg/kg propranolol or vehicle (n = 15) for 10 weeks. Tibial and femoral bone mineral density (BMD) were analyzed longitudinally by dual-energy X-ray absorptiometry. At death, the left tibial metaphysis and L(4) vertebrae were removed, and microcomputed tomography (Skyscan 1072; Skyscan, Aartselaar, Belgium) was performed for trabecular bone structure investigation. Histomorphometry analysis was performed on the right proximal tibia to assess bone cell activities. After 10 weeks, OVX rats had decreased BMD and trabecular parameters and increased bone turnover, as well as cortical porosity compared with the sham group (p < 0.001). Bone architecture alteration was preserved by 0.1 mg/kg propranolol due to higher trabecular number and thickness (+50.35 and +6.81%, respectively, than OVX; p < 0.001) and lower cortical pore number (-52.38% than OVX; p < 0.001). Animals treated by 0.1 mg/kg propranolol had a lower osteoclast surface and a higher osteoblast activity compared with OVX. Animals treated by 20 mg of propranolol did not significantly differ from OVX rats. Animals treated by 5 mg of propranolol have been partially preserved from the ovariectomy. These results showed a dose effect of beta-blockers. The lower the dose of propranolol breeding, the better the preventive effect against ovariectomy. SN - 0022-3565 UR - https://www.unboundmedicine.com/medline/citation/16740619/Dose_effects_of_propranolol_on_cancellous_and_cortical_bone_in_ovariectomized_adult_rats_ L2 - https://jpet.aspetjournals.org/cgi/pmidlookup?view=long&amp;pmid=16740619 DB - PRIME DP - Unbound Medicine ER -