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Faltusová K, Báječný M, Heizer T, Páral P, Chen CL, Szikszai K, Klener P, Nečas E. Second bone marrow transplantation into regenerating hematopoiesis enhances reconstitution of immune system. Front Immunol 2024; 15:1405210. [PMID: 38947315 PMCID: PMC11211250 DOI: 10.3389/fimmu.2024.1405210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Accepted: 05/28/2024] [Indexed: 07/02/2024] Open
Abstract
In bone marrow transplantation (BMT), hematopoiesis-reconstituting cells are introduced following myeloablative treatment, which eradicates existing hematopoietic cells and disrupts stroma within the hematopoietic tissue. Both hematopoietic cells and stroma then undergo regeneration. Our study compares the outcomes of a second BMT administered to mice shortly after myeloablative treatment and the first BMT, with those of a second BMT administered to mice experiencing robust hematopoietic regeneration after the initial transplant. We evaluated the efficacy of the second BMT in terms of engraftment efficiency, types of generated blood cells, and longevity of function. Our findings show that regenerating hematopoiesis readily accommodates newly transplanted stem cells, including those endowed with a robust capacity for generating B and T cells. Importantly, our investigation uncovered a window for preferential engraftment of transplanted stem cells coinciding with the resumption of blood cell production. Repeated BMT could intensify hematopoiesis reconstitution and enable therapeutic administration of genetically modified autologous stem cells.
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Affiliation(s)
| | | | | | | | | | | | | | - Emanuel Nečas
- Institute of Pathological Physiology, First Faculty of Medicine, Charles University, Prague, Czechia
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Zhou Q, Cao C, Bao Y, Sun T, Yao Adzraku S, Hao X, Li Y, Yuan S, Huang Y, Xu K, Qiao J, Ju W, Zeng L. Macrophage depletion damages hematopoiesis partially through inhibition of cell homing and expansion after hematopoietic cell transplantation. Int Immunopharmacol 2024; 130:111760. [PMID: 38428148 DOI: 10.1016/j.intimp.2024.111760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 02/22/2024] [Accepted: 02/22/2024] [Indexed: 03/03/2024]
Abstract
Bone marrow macrophages (Mφ) are essential components of the bone marrow niche that regulate the function of hematopoietic stem cells. Poor graft function and inhibition of hematopoietic production can result from abnormal macrophage function; however, the underlying mechanism is unclear. Clodronate liposomes (Clo-Lip) have been used widely to deplete macrophages and study their functions. Our previous results showed that Clod-Lip-mediated clearance of macrophages plays a vital role in regulating hematopoietic reconstruction after allogeneic hematopoietic cell transplantation (HCT). In this study, using an isogenic hematopoietic stem cell transplantation model, we found that Clod-Lip-mediated clearance of macrophages suppressed hematopoietic reconstruction by inhibiting the homing process of hematopoietic cells. We also demonstrated that macrophage depletion inhibited the direct supportive effect of macrophages on hematopoietic stem and progenitor cells and erythroid differentiation but promoted the production of megakaryocytic progenitors ex vivo. We showed that macrophages increase CD49e expression on hematopoietic stem and progenitor cells (HSPCs). However, CD49e inhibitors did not support the proliferative effect of macrophages on hematopoietic cells. In contrast, macrophage E-selectin/ intercellular cell adhesion molecule-1 (ICAM-1) may be involved in directly regulating HSPCs. In conclusion, macrophage depletion with Clo-Lip partially disrupts bone marrow hematopoiesis after HCT by impeding donor cell homing and macrophage-HSPCs interactions.
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Affiliation(s)
- Qi Zhou
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou 221002, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou 221002, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China; Xuzhou Ruihu Health Management Consulting Co., Ltd, Xuzhou 221002, China
| | - Can Cao
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou 221002, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou 221002, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China; Xuzhou Ruihu Health Management Consulting Co., Ltd, Xuzhou 221002, China
| | - Yurong Bao
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou 221002, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou 221002, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - Tiantian Sun
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou 221002, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou 221002, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - Seyram Yao Adzraku
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou 221002, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou 221002, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China; Xuzhou Ruihu Health Management Consulting Co., Ltd, Xuzhou 221002, China
| | - Xiaowen Hao
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou 221002, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou 221002, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - Yue Li
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou 221002, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou 221002, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - Shengnan Yuan
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou 221002, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou 221002, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - Yujin Huang
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou 221002, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou 221002, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - Kailin Xu
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou 221002, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou 221002, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - Jianlin Qiao
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou 221002, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou 221002, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China.
| | - Wen Ju
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou 221002, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou 221002, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China; Xuzhou Ruihu Health Management Consulting Co., Ltd, Xuzhou 221002, China.
| | - Lingyu Zeng
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou 221002, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou 221002, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China.
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Root SH, Matthews BG, Torreggiani E, Aguila HL, Kalajzic I. Hematopoietic and stromal DMP1-Cre labeled cells form a unique niche in the bone marrow. Sci Rep 2023; 13:22403. [PMID: 38104230 PMCID: PMC10725438 DOI: 10.1038/s41598-023-49713-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 12/11/2023] [Indexed: 12/19/2023] Open
Abstract
Skeletogenesis and hematopoiesis are interdependent. Niches form between cells of both lineages where microenvironmental cues support specific lineage commitment. Because of the complex topography of bone marrow (BM), the identity and function of cells within specialized niches has not been fully elucidated. Dentin Matrix Protein 1 (DMP1)-Cre mice have been utilized in bone studies as mature osteoblasts and osteocytes express DMP1. DMP1 has been identified in CXCL12+ cells and an undefined CD45+ population. We crossed DMP1-Cre with Ai9 reporter mice and analyzed the tdTomato+ (tdT+) population in BM and secondary hematopoietic organs. CD45+tdT+ express myeloid markers including CD11b and are established early in ontogeny. CD45+tdT+ cells phagocytose, respond to LPS and are radioresistant. Depletion of macrophages caused a significant decrease in tdT+CD11b+ myeloid populations. A subset of CD45+tdT+ cells may be erythroid island macrophages (EIM) which are depleted after G-CSF treatment. tdT+CXCL12+ cells are in direct contact with F4/80 macrophages, express RANKL and form a niche with B220+ B cells. A population of resident cells within the thymus are tdT+ and express myeloid markers and RANKL. In conclusion, in addition to targeting osteoblast/osteocytes, DMP1-Cre labels unique cell populations of macrophage and stromal cells within BM and thymus niches and expresses key microenvironmental factors.
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Affiliation(s)
- Sierra H Root
- Center for Regenerative Medicine and Skeletal Development, MC 3705, School of Dental Medicine, UConn Health, 263 Farmington Ave, Farmington, CT, 06030, USA.
- Division of Pediatric Dentistry, MC1610, School of Dental Medicine, UConn Health, 263 Farmington Ave, Farmington, CT, 06030, USA.
| | - Brya G Matthews
- Center for Regenerative Medicine and Skeletal Development, MC 3705, School of Dental Medicine, UConn Health, 263 Farmington Ave, Farmington, CT, 06030, USA
- Department of Molecular Medicine and Pathology, University of Auckland, Auckland, New Zealand
| | - Elena Torreggiani
- Center for Regenerative Medicine and Skeletal Development, MC 3705, School of Dental Medicine, UConn Health, 263 Farmington Ave, Farmington, CT, 06030, USA
| | | | - Ivo Kalajzic
- Center for Regenerative Medicine and Skeletal Development, MC 3705, School of Dental Medicine, UConn Health, 263 Farmington Ave, Farmington, CT, 06030, USA.
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