Korean J Spine.  2015 Jun;12(2):55-59. 10.14245/kjs.2015.12.2.55.

Bone Mineral Density Changes after Orchiectomy using a Scrotal Approach in Rats

• Ryu SJ
• Ryu DS
• Kim JY
• Park JY
• Kim KH
• Chin DK
• Kim KS
• Cho YE
• Kuh SU

• KMID: 1927559
• DOI: http://doi.org/10.14245/kjs.2015.12.2.55

Abstract

OBJECTIVE
To investigate a suitable animal model for studies of male osteoporosis. Osteoporosis has a particularly high incidence in postmenopausal women, resulting in a substantial amount of research with respect to this disease in women. However, research on osteoporosis in men is still lacking.
METHODS
Twenty 10-week-old male Sprague Dawley rats were used in this study, including 4 rats used to establish a baseline bone mineral density (BMD). The other 16 rats were divided into two groups: a sham surgery group (n=8), which underwent a sham operation, and an orchiectomized rat group (OCX) (n=8), which underwent bilateral OCX at 10 weeks of age. Bone mineral density was measured in 4 rats from both the sham surgery group and the OCX group 8 weeks after the surgery, while BMD in the remainder of the rats was measured 10 weeks post-surgery.
RESULTS
Femoral BMD at 8 weeks post-surgery was found to be significantly lower in the OCX group compared to the sham group; a finding that was also similar 10 weeks post-surgery.
CONCLUSION
8 weeks after undergoing orchiectomy performed via a scrotal, white rats are a suitable model for studies of male osteoporosis.

Keyword

Animal model; Osteoporosis; Male; Orchiectomy; Bone mineral density; Femur

MeSH Terms

Animals
Bone Density*
Female
Femur
Humans
Incidence
Male
Models, Animal
Multiple Endocrine Neoplasia Type 1
Orchiectomy*
Osteoporosis
Rats*
Rats, Sprague-Dawley