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Type: Journal article
Title: A novel promoter regulates calcitonin receptor gene expression in human osteoclasts
Author: Shen, Z.
Crotti, T.
Flannery, M.
Matsuzaki, K.
Goldring, S.
McHugh, K.
Citation: Biochimica et Biopysica Acta, 2007; 1769(11-12):659-667
Publisher: Elsevier Science
Issue Date: 2007
ISSN: 0006-3002
Abstract: The calcitonin receptor (CTR) is expressed in a wide variety of tissues and cell types. In bone, its expression is restricted to osteoclasts, the cells that mediate bone resorption. The human CTR (hCTR) gene has a complex structural organization that exhibits similarity to the porcine (pCTR) and mouse (mCTR) CTR genes. In these species, alternative splicing of a single gene generates multiple CTR isoforms that are distributed in both tissue-specific and species-specific patterns. However, the structural organization of the 5' putative regulatory region and transcriptional mechanisms responsible for tissue-specific expression of the different CTR isoforms are not fully defined. The present studies were undertaken to characterize the structural organization of the 5'-region of the hCTR and identify the regulatory regions involved in osteoclast-specific transcriptional activation. Analysis of mRNA prepared from human osteoclasts using reverse transcription-polymerase chain reaction (RT-PCR) and transient transfection of hCTR promoter-luciferase reporter constructs identified two regions in the 5'-flanking sequence of the hCTR gene that regulated CTR gene expression in osteoclasts. Both of these putative promoters were responsive to the osteoclast-inducing cytokine, receptor activator of NF-kappaB ligand (RANKL) and demonstrated trans-activation by the RANKL-induced transcription factor nuclear factor of activated T cells (NFATc1), consistent with a role in regulating CTR gene expression in osteoclasts.
RMID: 0020082842
DOI: 10.1006/bbrc.2000.2842
Appears in Collections:Pathology publications

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