NDLI: Hyperhomocysteinemia decreases bone blood flow

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Hyperhomocysteinemia decreases bone blood flow

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Hyperhomocysteinemia decreases bone blood flow

Content Provider	PubMed Central
Author	Tyagi, Neetu Vacek, Thomas P. Fleming, John T. Vacek, Jonathan C. Tyagi, Suresh C.
Abstract	Elevated plasma levels of homocysteine (Hcy), known as hyperhomocysteinemia (HHcy), are associated with osteoporosis. A decrease in bone blood flow is a potential cause of compromised bone mechanical properties. Therefore, we hypothesized that HHcy decreases bone blood flow and biomechanical properties. To test this hypothesis, male Sprague–Dawley rats were treated with Hcy (0.67 g/L) in drinking water for 8 weeks. Age-matched rats served as controls. At the end of the treatment period, the rats were anesthetized. Blood samples were collected from experimental or control rats. Biochemical turnover markers (body weight, Hcy, vitamin B12, and folate) were measured. Systolic blood pressure was measured from the right carotid artery. Tibia blood flow was measured by laser Doppler flow probe. The results indicated that Hcy levels were significantly higher in the Hcy-treated group than in control rats, whereas vitamin B12 levels were lower in the Hcy-treated group compared with control rats. There was no significant difference in folate concentration and blood pressure in Hcy-treated versus control rats. The tibial blood flow index of the control group was significantly higher (0.78 ± 0.09 flow unit) compared with the Hcy-treated group (0.51 ± 0.09). The tibial mass was 1.1 ± 0.1 g in the control group and 0.9 ± 0.1 in the Hcy-treated group. The tibia bone density was unchanged in Hcy-treated rats. These results suggest that Hcy causes a reduction in bone blood flow, which contributes to compromised bone biomechanical properties.
Related Links	http://dx.doi.org/10.2147/vhrm.s15844
Ending Page	35
Starting Page	31
File Format	PDF
ISSN	11782048
e-ISSN	11782048
Journal	Vascular Health and Risk Management
Volume Number	7
Language	English
Publisher	Dove Medical Press
Publisher Date	2011-01-01
Access Restriction	Open
Rights Holder	Dove Medical Press
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article

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