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Title

EVALUATING GLUCOCORTICOID ADMINISTRATION ON BIOMECHANICAL PROPERTIES OF RATS’ TIBIAL DIAPHYSIS

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Abstract

 Background: Osteoporosis is a disease, which causes bone loss and fractures. Although GLUCOCORTICOIDS effectively suppress inflammation, their chronic use is accompanied by bone loss with a tendency toward secondary osteoporosis.Objectives: This study took into consideration the importance of cortical bone in the entire bone's mechanical competence. Hence, the aim of this study was to assess the effects of different protocols of glucocorticoid administration on the biomechanical properties of TIBIAl bone diaphysis in RATS compared to control and low-level laser-treated RATS.Materials and Methods: This experimental study was conducted at Shahid Beheshti University of Medical Sciences, Tehran, Iran. We used systematic random sampling to divide 40 adult male RATS into 8 groups with 5 RATS in each group. Groups were as follows: 1) control, 2) dexamethasone (7 mg/week), 3) dexamethasone (0.7 mg/week), 4) methylprednisolone (7 mg/kg/week), 5) methylprednisolone (5 mg/kg twice weekly), 6) dexamethasone (7 mg/kg three times per week), 7) dexamethasone (0.7 mg/kg thrice per week), and 8) low-level laser-treated RATS. The study periods were 4-7 weeks. At the end of the treatment periods, we examined the mechanical properties of TIBIAl bone diaphysis. Data were analyzed by statistical analyses.Results: Glucocorticoid-treated RATS showed weight loss and considerable mortality (21%). The biomechanical properties (maximum force) of glucocorticoid-treated RATS in groups 4 (62±2.9), 6 (63±5.1), and 7 (60±5.3) were comparable with the control (46±1.5) and low-level laser-treated (57±3.2) RATS.Conclusions: In contrast to the findings in humans and certain other species, glucocorticoid administration caused anabolic effect on the cortical bone of TIBIA diaphysis bone in RATS.

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    APA: Copy

    FREIDOUNI, MOHAMMADJAVAD, NEJATI, HOSSEIN, SALIMI, MARYAM, BAYAT, MOHAMMAD, AMINI, ABDOLLAH, NORUZIAN, MOHSEN, ASGHARIE, MOHAMMAD ALI, & REZAIAN, MILAD. (2015). EVALUATING GLUCOCORTICOID ADMINISTRATION ON BIOMECHANICAL PROPERTIES OF RATS’ TIBIAL DIAPHYSIS. IRANIAN RED CRESCENT MEDICAL JOURNAL (IRCMJ), 17(3), 0-0. SID. https://sid.ir/paper/292930/en

    Vancouver: Copy

    FREIDOUNI MOHAMMADJAVAD, NEJATI HOSSEIN, SALIMI MARYAM, BAYAT MOHAMMAD, AMINI ABDOLLAH, NORUZIAN MOHSEN, ASGHARIE MOHAMMAD ALI, REZAIAN MILAD. EVALUATING GLUCOCORTICOID ADMINISTRATION ON BIOMECHANICAL PROPERTIES OF RATS’ TIBIAL DIAPHYSIS. IRANIAN RED CRESCENT MEDICAL JOURNAL (IRCMJ)[Internet]. 2015;17(3):0-0. Available from: https://sid.ir/paper/292930/en

    IEEE: Copy

    MOHAMMADJAVAD FREIDOUNI, HOSSEIN NEJATI, MARYAM SALIMI, MOHAMMAD BAYAT, ABDOLLAH AMINI, MOHSEN NORUZIAN, MOHAMMAD ALI ASGHARIE, and MILAD REZAIAN, “EVALUATING GLUCOCORTICOID ADMINISTRATION ON BIOMECHANICAL PROPERTIES OF RATS’ TIBIAL DIAPHYSIS,” IRANIAN RED CRESCENT MEDICAL JOURNAL (IRCMJ), vol. 17, no. 3, pp. 0–0, 2015, [Online]. Available: https://sid.ir/paper/292930/en

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