alexa Growth hormone gene expression in canine normal growth plates and spontaneous osteosarcoma.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Stem Cell Research & Therapy

Author(s): Jolle Kirpensteijn, Evert van Garderen

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The indirect growth-promoting action of pituitary-derived growth hormone (GH) on skeletal growth is thought to be mediated by systemically released insulin-like growth factor-I (IGF-I) and by locally produced IGF-I. The aim of the present study was to document whether GH is expressed locally in canine bone and spontaneous osteosarcoma. Using RT-PCR the expression of GH mRNA was demonstrated in the metaphyseal, but not in the majority of epiphyseal ends of the canine growth plate. GH mRNA was also present in 25% of the canine osteosarcoma specimens. The expression of GH mRNA in predominantly active osteoid forming areas was associated with the presence of immunoreactive GH in osteoblasts, as shown by immunohistochemistry. It is concluded that locally produced GH is involved in osteoid formation and may play a role in the growth of neoplastic bone lesions in the dog.

This article was published in Mol Cell Endocrinol and referenced in Journal of Stem Cell Research & Therapy

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