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Xia S, Li XP, Cheng L, Han MT, Zhang MM, Shao QX, Xu HX, Qi L. Fish Oil-Rich Diet Promotes Hematopoiesis and Alters Hematopoietic Niche. Endocrinology 2015; 156:2821-30. [PMID: 26061726 PMCID: PMC4511132 DOI: 10.1210/en.2015-1258] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The self-renewal and differentiation of hematopoietic stem cells (HSCs) in bone marrow are essential to replenish all blood cell types, but how this process is influenced by diet remains largely unclear. Here we show that a diet rich in fish oils promotes self-renewal of HSCs and extramedullary hematopoiesis. Chronic intake of a fish oil-rich diet increases the abundance of HSCs, alters the hematopoietic microenvironment, and, intriguingly, induces the expression of matrix metalloproteinase 12 (MMP12) in the bone marrow. Pointing to a direct effect of fish oil on MMP12 expression, omega-3 polyunsaturated fatty acids induce the expression of MMP12 in a dose-dependent manner in bone marrow cells. Importantly, down-regulation of MMP12 activity using an MMP12-specific inhibitor attenuates diet-induced myelopoiesis in both bone marrow and spleen. Thus, a fish oil-rich diet promotes hematopoiesis in the bone marrow and spleen, in part via the activity of MMP12. Taken together, these data provide new insights into diet-mediated regulation of hematopoiesis.
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Affiliation(s)
- Sheng Xia
- Department of Immunology (S.X., M.Z., Q.S., H.X., L.Q.) and Institute of Clinic Laboratory Diagnosis (S.X., X.L., L.C., M.H., M.Z., Q.S., H.X.), School of Medicine, Jiangsu University, Zhenjiang, Jiangsu 212013, China; and Division of Nutritional Sciences (S.X., L.Q.), Cornell University, Ithaca, New York 14853
| | - Xiao-ping Li
- Department of Immunology (S.X., M.Z., Q.S., H.X., L.Q.) and Institute of Clinic Laboratory Diagnosis (S.X., X.L., L.C., M.H., M.Z., Q.S., H.X.), School of Medicine, Jiangsu University, Zhenjiang, Jiangsu 212013, China; and Division of Nutritional Sciences (S.X., L.Q.), Cornell University, Ithaca, New York 14853
| | - Lu Cheng
- Department of Immunology (S.X., M.Z., Q.S., H.X., L.Q.) and Institute of Clinic Laboratory Diagnosis (S.X., X.L., L.C., M.H., M.Z., Q.S., H.X.), School of Medicine, Jiangsu University, Zhenjiang, Jiangsu 212013, China; and Division of Nutritional Sciences (S.X., L.Q.), Cornell University, Ithaca, New York 14853
| | - Mu-tian Han
- Department of Immunology (S.X., M.Z., Q.S., H.X., L.Q.) and Institute of Clinic Laboratory Diagnosis (S.X., X.L., L.C., M.H., M.Z., Q.S., H.X.), School of Medicine, Jiangsu University, Zhenjiang, Jiangsu 212013, China; and Division of Nutritional Sciences (S.X., L.Q.), Cornell University, Ithaca, New York 14853
| | - Miao-miao Zhang
- Department of Immunology (S.X., M.Z., Q.S., H.X., L.Q.) and Institute of Clinic Laboratory Diagnosis (S.X., X.L., L.C., M.H., M.Z., Q.S., H.X.), School of Medicine, Jiangsu University, Zhenjiang, Jiangsu 212013, China; and Division of Nutritional Sciences (S.X., L.Q.), Cornell University, Ithaca, New York 14853
| | - Qi-xiang Shao
- Department of Immunology (S.X., M.Z., Q.S., H.X., L.Q.) and Institute of Clinic Laboratory Diagnosis (S.X., X.L., L.C., M.H., M.Z., Q.S., H.X.), School of Medicine, Jiangsu University, Zhenjiang, Jiangsu 212013, China; and Division of Nutritional Sciences (S.X., L.Q.), Cornell University, Ithaca, New York 14853
| | - Hua-xi Xu
- Department of Immunology (S.X., M.Z., Q.S., H.X., L.Q.) and Institute of Clinic Laboratory Diagnosis (S.X., X.L., L.C., M.H., M.Z., Q.S., H.X.), School of Medicine, Jiangsu University, Zhenjiang, Jiangsu 212013, China; and Division of Nutritional Sciences (S.X., L.Q.), Cornell University, Ithaca, New York 14853
| | - Ling Qi
- Department of Immunology (S.X., M.Z., Q.S., H.X., L.Q.) and Institute of Clinic Laboratory Diagnosis (S.X., X.L., L.C., M.H., M.Z., Q.S., H.X.), School of Medicine, Jiangsu University, Zhenjiang, Jiangsu 212013, China; and Division of Nutritional Sciences (S.X., L.Q.), Cornell University, Ithaca, New York 14853
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Monitoring immune modulation by nutrition in the general population: identifying and substantiating effects on human health. Br J Nutr 2013; 110 Suppl 2:S1-30. [PMID: 23228631 PMCID: PMC3734536 DOI: 10.1017/s0007114513001505] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Optimal functioning of the immune system is crucial to human health, and nutrition is one of the major exogenous factors modulating different aspects of immune function. Currently, no single marker is available to predict the effect of a dietary intervention on different aspects of immune function. To provide further guidance on the assessment and interpretation of the modulation of immune functions due to nutrition in the general population, International Life Sciences Institute Europe commissioned a group of experts from academia, government and the food industry to prepare a guidance document. A draft of this paper was refined at a workshop involving additional experts. First, the expert group defined criteria to evaluate the usefulness of immune function markers. Over seventy-five markers were scored within the context of three distinct immune system functions: defence against pathogens; avoidance or mitigation of allergy; control of low-grade (metabolic) inflammation. The most useful markers were subsequently classified depending on whether they by themselves signify clinical relevance and/or involvement of immune function. Next, five theoretical scenarios were drafted describing potential changes in the values of markers compared with a relevant reference range. Finally, all elements were combined, providing a framework to aid the design and interpretation of studies assessing the effects of nutrition on immune function. This stepwise approach offers a clear rationale for selecting markers for future trials and provides a framework for the interpretation of outcomes. A similar stepwise approach may also be useful to rationalise the selection and interpretation of markers for other physiological processes critical to the maintenance of health and well-being.
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