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Gergues M, Nagula V, Bliss SA, Eljarrah A, Ayer S, Gnanavel N, Sinha G, Wu Q, Yehia G, Greco SJ, Qian J, Rameshwar P. Neuroimmune/Hematopoietic Axis with Distinct Regulation by the High-Mobility Group Box 1 in Association with Tachykinin Peptides. THE JOURNAL OF IMMUNOLOGY 2020; 204:879-891. [PMID: 31924647 DOI: 10.4049/jimmunol.1900582] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Accepted: 12/13/2019] [Indexed: 01/16/2023]
Abstract
Hematopoiesis is tightly regulated by the bone marrow (BM) niche. The niche is robust, allowing for the return of hematopoietic homeostasis after insults such as infection. Hematopoiesis is partly regulated by soluble factors, such as neuropeptides, substance P (SP), and neurokinin A (NK-A), which mediate hematopoietic stimulation and inhibition, respectively. SP and NK-A are derived from the Tac1 gene that is alternately spliced into four variants. The hematopoietic effects of SP and NK-A are mostly mediated via BM stroma. Array analyses with 2400 genes indicated distinct changes in SP-stimulated BM stroma. Computational analyses indicated networks of genes with hematopoietic regulation. Included among these networks is the high-mobility group box 1 gene (HMGB1), a nonhistone chromatin-associated protein. Validation studies indicated that NK-A could reverse SP-mediated HMGB1 decrease. Long-term culture-initiating cell assay, with or without NK-A receptor antagonist (NK2), showed a suppressive effect of HMGB1 on hematopoietic progenitors and increase in long-term culture-initiating cell assay cells (primitive hematopoietic cells). These effects occurred partly through NK-A. NSG mice with human hematopoietic system injected with the HMGB1 antagonist glycyrrhizin verified the in vitro effects of HMGB1. Although the effects on myeloid lineage were suppressed, the results suggested a more complex effect on the lymphoid lineage. Clonogenic assay for CFU- granulocyte-monocyte suggested that HMGB1 may be required to prevent hematopoietic stem cell exhaustion to ensure immune homeostasis. In summary, this study showed how HMGB1 is linked to SP and NK-A to protect the most primitive hematopoietic cell and also to maintain immune/hematopoietic homeostasis.
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Affiliation(s)
- Marina Gergues
- Department of Medicine, Rutgers New Jersey Medical School, Newark, New Jersey 07103.,Rutgers School of Graduate Studies at New Jersey Medical School, Newark, New Jersey 07103
| | - Vipul Nagula
- Department of Medicine, Rutgers New Jersey Medical School, Newark, New Jersey 07103.,Rutgers School of Graduate Studies at New Jersey Medical School, Newark, New Jersey 07103
| | - Sarah A Bliss
- Department of Medicine, Rutgers New Jersey Medical School, Newark, New Jersey 07103.,Rutgers School of Graduate Studies at New Jersey Medical School, Newark, New Jersey 07103
| | - Adam Eljarrah
- Department of Medicine, Rutgers New Jersey Medical School, Newark, New Jersey 07103.,Rutgers School of Graduate Studies at New Jersey Medical School, Newark, New Jersey 07103
| | - Seda Ayer
- Department of Medicine, Rutgers New Jersey Medical School, Newark, New Jersey 07103.,Rutgers School of Graduate Studies at New Jersey Medical School, Newark, New Jersey 07103
| | - Nikhil Gnanavel
- Department of Medicine, Rutgers New Jersey Medical School, Newark, New Jersey 07103
| | - Garima Sinha
- Department of Medicine, Rutgers New Jersey Medical School, Newark, New Jersey 07103.,Rutgers School of Graduate Studies at New Jersey Medical School, Newark, New Jersey 07103
| | - Qunfeng Wu
- Department of Pathology, Immunology, and Laboratory Medicine, Rutgers New Jersey Medical School, Newark, New Jersey 07103; and
| | - Ghassan Yehia
- Genome Editing Shared Resource, Office of Research and Economic Development, Rutgers University, New Brunswick, New Jersey 08901
| | - Steven J Greco
- Department of Medicine, Rutgers New Jersey Medical School, Newark, New Jersey 07103
| | - Jing Qian
- Department of Medicine, Rutgers New Jersey Medical School, Newark, New Jersey 07103
| | - Pranela Rameshwar
- Department of Medicine, Rutgers New Jersey Medical School, Newark, New Jersey 07103; .,Rutgers School of Graduate Studies at New Jersey Medical School, Newark, New Jersey 07103
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Niedermair T, Schirner S, Seebröker R, Straub RH, Grässel S. Substance P modulates bone remodeling properties of murine osteoblasts and osteoclasts. Sci Rep 2018; 8:9199. [PMID: 29907830 PMCID: PMC6003941 DOI: 10.1038/s41598-018-27432-y] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 06/04/2018] [Indexed: 11/09/2022] Open
Abstract
Clinical observations suggest neuronal control of bone remodeling. Sensory nerve fibers innervating bone, bone marrow and periosteum signal via neurotransmitters including substance P (SP). In previous studies we observed impaired biomechanical and structural bone parameters in tachykinin (Tac) 1-deficient mice lacking SP. Here, we aim to specify effects of SP on metabolic parameters of bone marrow macrophage (BMM)/osteoclast cultures and osteoblasts isolated from Tac1-deficient and wildtype (WT) mice. We demonstrated endogenous SP production and secretion in WT bone cells. Absence of SP reduced bone resorption rate, as we found reduced numbers of precursor cells (BMM) and multinucleated osteoclasts and measured reduced cathepsin K activity in Tac1-/- BMM/osteoclast cultures. However, this might partly be compensated by reduced apoptosis rate and increased fusion potential of Tac1-/- precursor cells to enlarged "super" osteoclasts. Contrarily, increased ALP enzyme activity and apoptosis rate during early osteoblast differentiation accelerated osteogenesis and cell death in the absence of SP together with reduced ALP activity of Tac1-/- osteoblasts during late osteogenic differentiation resulting in reduced bone formation at later stages. Therefore, we suggest that absence of SP presumably results in a slight reduction of bone resorption rate but concomitantly in a critical reduction of bone formation and mineralization rate.
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Affiliation(s)
- Tanja Niedermair
- Department of Orthopaedic Surgery, University of Regensburg, Regensburg, Germany.,Department of Orthopaedic Surgery, Experimental Orthopaedics, Centre for Medical Biotechnology, University of Regensburg, Regensburg, Germany
| | - Stephan Schirner
- Department of Orthopaedic Surgery, Experimental Orthopaedics, Centre for Medical Biotechnology, University of Regensburg, Regensburg, Germany
| | - Raphael Seebröker
- Department of Orthopaedic Surgery, Experimental Orthopaedics, Centre for Medical Biotechnology, University of Regensburg, Regensburg, Germany
| | - Rainer H Straub
- Department of Internal Medicine I, Experimental Rheumatology and Neuroendocrine-Immunology, University of Regensburg, Regensburg, Germany
| | - Susanne Grässel
- Department of Orthopaedic Surgery, University of Regensburg, Regensburg, Germany. .,Department of Orthopaedic Surgery, Experimental Orthopaedics, Centre for Medical Biotechnology, University of Regensburg, Regensburg, Germany.
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