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Hsiao YT, Jestes KJ, Jackson KL, Zukosky T, Squire ME, Hum JM, Lowery JW. Neuromedin U (NMU) regulates osteoblast differentiation and activity. Biochem Biophys Res Commun 2020; 524:890-894. [PMID: 32057362 DOI: 10.1016/j.bbrc.2020.02.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 02/02/2020] [Indexed: 12/12/2022]
Abstract
Osteoporosis is a disease of low bone mass that places individuals at enhanced risk for fracture, disability, and death. Osteoporosis rates are expected to rise significantly in the coming decades yet there are limited pharmacological treatment options, particularly for long-term management of this chronic condition. The drug development pipeline is relatively bereft of new strategies, causing an urgent and unmet need for developing new strategies and targets for treating osteoporosis. Here, we examine a lesser-studied bone remodeling pathway, Neuromedin U (NMU), which is expressed in the bone microenvironment along with its cognate receptors NMU receptor 1 (NMUR1) and 2 (NMUR2). We independently corroborate a prior report that global loss of NMU expression leads to high bone mass and test the hypothesis that NMU negatively regulates osteoblast differentiation. Consistent with this, in vitro studies reveal NMU represses osteoblastic differentiation of osteogenic precursors but, in contrast, promotes osteoblastic marker expression, proliferation and activity of osteoblast-like cells. Phospho-profiling arrays were used to detail differential signaling outcomes that may underlie the opposite responses of these cell types. Collectively, our findings indicate that NMU exerts cell-type-specific responses to regulate osteoblast differentiation and activity.
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Affiliation(s)
- Yu-Tin Hsiao
- Division of Biomedical Science, Marian University College of Osteopathic Medicine, Indianapolis, IN, USA; Bone & Mineral Research Group, Marian University, Indianapolis, IN, USA
| | - Kelli J Jestes
- Division of Biomedical Science, Marian University College of Osteopathic Medicine, Indianapolis, IN, USA; Bone & Mineral Research Group, Marian University, Indianapolis, IN, USA
| | - Krista L Jackson
- Division of Biomedical Science, Marian University College of Osteopathic Medicine, Indianapolis, IN, USA; Bone & Mineral Research Group, Marian University, Indianapolis, IN, USA
| | - Tara Zukosky
- Department of Biology, The University of Scranton, Scranton, PA, USA
| | - Maria E Squire
- Department of Biology, The University of Scranton, Scranton, PA, USA
| | - Julia M Hum
- Division of Biomedical Science, Marian University College of Osteopathic Medicine, Indianapolis, IN, USA; Bone & Mineral Research Group, Marian University, Indianapolis, IN, USA
| | - Jonathan W Lowery
- Division of Biomedical Science, Marian University College of Osteopathic Medicine, Indianapolis, IN, USA; Bone & Mineral Research Group, Marian University, Indianapolis, IN, USA; Indiana Center for Musculoskeletal Health, School of Medicine, Indiana University, Indianapolis, IN, USA.
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