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Pharmacological treatment of osteopenia induced by gastrectomy or ovariectomy in young female rats

Andersson, Niklas U. LU ; Surve, Vikas LU ; Lehto-Axtelius, Daisy; Andersson, Kjell; Ryberg, Birgitta; Ohlsson, Claes and Håkanson, Rolf LU (2004) In Acta Orthopaedica Scandinavica 75(2). p.201-209
Abstract
Background Both gastrectomy (GX) and ovariectomy (OVX) induce osteopenia in man and experimental animals. The present study addresses the question - can alendronate, estrogen or parathyroid hormone (PTH) be used to treat established GX- or OVX -evoked osteopenia?



Methods Rats were GX-, OVX- or SHAM-operated 8 weeks before starting the treatment with drugs. Each group was then treated for 8 weeks with 50 µg/kg/day alendronate, 10 µg/kg/day estrogen or 75 µg/kg/day PTH(1-84); n=8 rats/group. Peripheral Quantitative Computed Tomography (pQCT) was used to measure trabecular bone mineral density (BMD) and various cortical bone parameters.



Results At killing, 16 weeks after surgery, GX and OVX rats had a... (More)
Background Both gastrectomy (GX) and ovariectomy (OVX) induce osteopenia in man and experimental animals. The present study addresses the question - can alendronate, estrogen or parathyroid hormone (PTH) be used to treat established GX- or OVX -evoked osteopenia?



Methods Rats were GX-, OVX- or SHAM-operated 8 weeks before starting the treatment with drugs. Each group was then treated for 8 weeks with 50 µg/kg/day alendronate, 10 µg/kg/day estrogen or 75 µg/kg/day PTH(1-84); n=8 rats/group. Peripheral Quantitative Computed Tomography (pQCT) was used to measure trabecular bone mineral density (BMD) and various cortical bone parameters.



Results At killing, 16 weeks after surgery, GX and OVX rats had a greatly reduced trabecular BMD in the metaphysis of the distal femur (GX -44% and OVX -55%). Alendronate increased the trabecular BMD by 44% in GX rats and by 64% in OVX rats, while PTH increased it by 51% and 115%, respectively. However, estrogen increased the trabecular BMD in GX rats (35%), but not in OVX rats (15%, not significant). Cortical bone parameters were adversely (but moderately) affected by GX, but not by OVX or by treatment with the three drugs.



Interpretation Alendronate, estrogen and PTH restored the trabecular bone loss in rats with an established GX-evoked osteopenia. In contrast, alendronate and PTH, but not estrogen, restored the trabecular bone loss after OVX. Hence, the mechanism underlying GX-evoked bone loss differs from that underlying OVXevoked bone loss. The ability of alendronate, estrogen and PTH to reverse the GX-evoked osteopenia in the rat may be of clinical interest when dealing with bone loss in humans after GX. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Acta Orthopaedica Scandinavica
volume
75
issue
2
pages
201 - 209
publisher
Taylor & Francis
external identifiers
  • wos:000221196100012
  • pmid:15180236
  • scopus:2342526556
ISSN
0001-6470
DOI
10.1080/00016470412331294465
language
English
LU publication?
yes
id
508ff51d-2741-4c15-a2ab-05ea6755b2b8 (old id 126440)
alternative location
http://taylorandfrancis.metapress.com/openurl.asp?genre=article&id=doi:10.1080/00016470412331294465
date added to LUP
2007-07-09 16:30:50
date last changed
2017-11-27 12:52:50
@article{508ff51d-2741-4c15-a2ab-05ea6755b2b8,
  abstract     = {Background Both gastrectomy (GX) and ovariectomy (OVX) induce osteopenia in man and experimental animals. The present study addresses the question - can alendronate, estrogen or parathyroid hormone (PTH) be used to treat established GX- or OVX -evoked osteopenia?<br/><br>
<br/><br>
Methods Rats were GX-, OVX- or SHAM-operated 8 weeks before starting the treatment with drugs. Each group was then treated for 8 weeks with 50 µg/kg/day alendronate, 10 µg/kg/day estrogen or 75 µg/kg/day PTH(1-84); n=8 rats/group. Peripheral Quantitative Computed Tomography (pQCT) was used to measure trabecular bone mineral density (BMD) and various cortical bone parameters.<br/><br>
<br/><br>
Results At killing, 16 weeks after surgery, GX and OVX rats had a greatly reduced trabecular BMD in the metaphysis of the distal femur (GX -44% and OVX -55%). Alendronate increased the trabecular BMD by 44% in GX rats and by 64% in OVX rats, while PTH increased it by 51% and 115%, respectively. However, estrogen increased the trabecular BMD in GX rats (35%), but not in OVX rats (15%, not significant). Cortical bone parameters were adversely (but moderately) affected by GX, but not by OVX or by treatment with the three drugs.<br/><br>
<br/><br>
Interpretation Alendronate, estrogen and PTH restored the trabecular bone loss in rats with an established GX-evoked osteopenia. In contrast, alendronate and PTH, but not estrogen, restored the trabecular bone loss after OVX. Hence, the mechanism underlying GX-evoked bone loss differs from that underlying OVXevoked bone loss. The ability of alendronate, estrogen and PTH to reverse the GX-evoked osteopenia in the rat may be of clinical interest when dealing with bone loss in humans after GX.},
  author       = {Andersson, Niklas U. and Surve, Vikas and Lehto-Axtelius, Daisy and Andersson, Kjell and Ryberg, Birgitta and Ohlsson, Claes and Håkanson, Rolf},
  issn         = {0001-6470},
  language     = {eng},
  number       = {2},
  pages        = {201--209},
  publisher    = {Taylor & Francis},
  series       = {Acta Orthopaedica Scandinavica},
  title        = {Pharmacological treatment of osteopenia induced by gastrectomy or ovariectomy in young female rats},
  url          = {http://dx.doi.org/10.1080/00016470412331294465},
  volume       = {75},
  year         = {2004},
}