[Frontiers in Bioscience E2, 1073-1080, June 1, 2010]
Adrenomedullin and its expression in cancers and bone. A literature Review
Xing Dai1, Wei Ma1, Rajiv Kumar Jha1, Xijing He2
1Department of Orthopedic Surgery, First Affiliated Hospital of Xi`an Jiaotong University, Xi`an, 710061, China, 2 Department of Orthopedic Surgery, Second Affiliated Hospital of Xi`an Jiaotong University, Xi`an, 710061, China
TABLE OF CONTENTS
Adrenomedullin (ADM) was first isolated from pheochromocytoma tissue as a novel vasodilative peptide in 1993. ADM binds to two receptors on plasma membrane which are comprised of Calcitonin Receptor-Like Receptor (CRLR), a member of serpentine receptor superfamily, and Receptor Activity Modifying Protein (RAMP) type 2 or 3. ADM is known to have hypotensive activity. Recently, ADM has been shown to be an almost ubiquitous peptide, synthesized in many mammalian tissues. ADM has potent in vivo angiogenic activity and tumor growth promoting effect in animal models. Many human tumors express ADM. However, only little information exists regarding the expression or the role of ADM in bone and its effect in bone metabolism. It is still not clear whether ADM is involved in pathogenesis and development of osteosarcoma, the most common form of bone tumor. The purpose of this review is to examine the most salient features of adrenomedullin biology, its expression in tumors and its potential implication in the treatment of bone tumors.