1
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Oza HH, Ng E, Gilkes DM. Staining Hypoxic Areas of Frozen and FFPE Tissue Sections with Hypoxyprobe™. Methods Mol Biol 2024; 2755:149-163. [PMID: 38319576 DOI: 10.1007/978-1-0716-3633-6_11] [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] [Indexed: 02/07/2024]
Abstract
Hypoxia occurs due to inadequate levels of oxygen in tissue and has been implicated in numerous diseases such as cancer, diabetes, cardiovascular, and neurodegenerative diseases. Hypoxia activates hypoxia-inducible factors (HIF) which mediate the expression of several downstream genes. Within the context of cancer biology, these genes affect cellular processes including metabolism, proliferation, migration, invasion, and metastasis. Pimonidazole hydrochloride (HCl) is an exogenous marker that is reduced and binds to thiols under hypoxic conditions resulting in adducts that can be visualized using antibodies such as Hypoxyprobe™. This chapter describes a method for using Hypoxyprobe™ to detect hypoxic areas in frozen and FFPE mouse samples by immunofluorescence (IF) and immunohistochemistry (IHC) staining.
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Affiliation(s)
- Harsh H Oza
- Department of Oncology, The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Esther Ng
- Department of Biology, The Zanvyl Krieger School of Arts & Sciences, The Johns Hopkins University, Baltimore, MD, USA
| | - Daniele M Gilkes
- Department of Oncology, The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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2
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Urao N, Liu J, Takahashi K, Ganesh G. Hematopoietic Stem Cells in Wound Healing Response. Adv Wound Care (New Rochelle) 2022; 11:598-621. [PMID: 34353116 PMCID: PMC9419985 DOI: 10.1089/wound.2021.0065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Significance: Emerging evidence has shown a link between the status of hematopoietic stem cells (HSCs) and wound healing responses. Thus, better understanding HSCs will contribute to further advances in wound healing research. Recent Advances: Myeloid cells such as neutrophils and monocyte-derived macrophages are critical players in the process of wound healing. HSCs actively respond to wound injury and other tissue insults, including infection and produce the effector myeloid cells, and a failing of the HSC response can result in impaired wound healing. Technological advances such as transcriptome at single-cell resolution, epigenetics, three-dimensional imaging, transgenic animals, and animal models, have provided novel concepts of myeloid generation (myelopoiesis) from HSCs, and have revealed cell-intrinsic and -extrinsic mechanisms that can impact HSC functions in the context of health conditions. Critical Issues: The newer concepts include-the programmed cellular fate at a differentiation stage that is used to be considered as the multilineage, the signaling pathways that can activate HSCs directly and indirectly, the mechanisms that can deteriorate HSCs, the roles and remodeling of the surrounding environment for HSCs and their progenitors (the niche). Future Directions: The researches on HSCs, which produce blood cells, should contribute to the development of blood biomarkers predicting a risk of chronic wounds, which may transform clinical practice of wound care with precision medicine for patients at high risk of poor healing.
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Affiliation(s)
- Norifumi Urao
- Department of Pharmacology, State University of New York Upstate Medical University, Syracuse, New York, USA.,Correspondence: Department of Pharmacology, State University of New York Upstate Medical University, 766 Irving Avenue, Weiskotten Hall Room 5322, Syracuse, NY 13210, USA.
| | - Jinghua Liu
- Department of Pharmacology, State University of New York Upstate Medical University, Syracuse, New York, USA
| | - Kentaro Takahashi
- Department of Pharmacology, State University of New York Upstate Medical University, Syracuse, New York, USA
| | - Gayathri Ganesh
- Department of Pharmacology, State University of New York Upstate Medical University, Syracuse, New York, USA
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3
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Meteorin links the bone marrow hypoxic state to hematopoietic stem/progenitor cell mobilization. Cell Rep 2022; 40:111361. [PMID: 36130501 DOI: 10.1016/j.celrep.2022.111361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 07/20/2022] [Accepted: 08/23/2022] [Indexed: 11/21/2022] Open
Abstract
Hematopoietic stem/progenitor cells (HSPCs) are supported and regulated by niche cells in the bone marrow with an important characterization of physiological hypoxia. However, how hypoxia regulates HSPCs is still unclear. Here, we find that meteorin (Metrn) from hypoxic macrophages restrains HSPC mobilization. Hypoxia-induced factor 1α and Yin Yang 1 induce the high expression of Metrn in macrophages, and macrophage-specific Metrn knockout increases HSPC mobilization through modulating HSPC proliferation and migration. Mechanistically, Metrn interacts with its receptor 5-hydroxytryptamine receptor 2b (Htr2b) to regulate the reactive oxygen species levels in HSPCs through targeting phospholipase C signaling. The reactive oxygen species levels are reduced in HSPCs of macrophage-specific Metrn knockout mice with activated phospholipase C signaling. Targeting the Metrn/Htr2b axis could therefore be a potential strategy to improve HSPC mobilization for stem cell-based therapy.
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4
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Qi J, Pan T, You T, Tang Y, Chu T, Chen J, Fan Y, Hu S, Yang F, Ruan C, Wu D, Han Y. Upregulation of HIF-1α contributes to complement activation in transplantation-associated thrombotic microangiopathy. Br J Haematol 2022; 199:603-615. [PMID: 35864790 DOI: 10.1111/bjh.18377] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 07/07/2022] [Accepted: 07/11/2022] [Indexed: 01/01/2023]
Abstract
Transplantation-associated thrombotic microangiopathy (TA-TMA) is a severe complication of haematopoietic stem cell transplantation (HSCT). Complement activation is involved in the development of TA-TMA. However, the underlying mechanism is unclear. Therefore, 21 samples of TA-TMA and 1:1 matched controls were measured for hypoxia-inducible factor-1α (HIF-1α) and complement protein. The mechanism was investigated both in vitro and in vivo. In this study, we found that levels of HIF-1α were significantly higher in TA-TMA patients than that in non-TA-TMA controls. Upregulation of HIF-1α induced an increase in membrane-bound complement C3 and dysfunction of human umbilical vein endothelial cells (HUVECs) in vitro. Increasing HIF-1α in vivo led to C3 and C5b-9 deposition in the glomerular endothelial capillary complex, thrombocytopenia, anaemia, and increased serum lactate dehydrogenase (LDH) levels in wild-type (WT) but not in C3-/- mice subjected to HSCT. High platelet aggregation in peripheral blood and CD41-positive microthrombi in the kidney were also found in dimethyloxallyl glycine (DMOG)-treated mice, recapitulating the TA-TMA phenotype seen in patients. Comprehensive analysis, including DNA array, luciferase reporter assay, chromatin immunoprecipitation (ChIP)-seq, and quantitative polymerase chain reaction (PCR), revealed that HIF-1α interacted with the promoter of complement factor H (CFH) to inhibit its transcription. Decreased CFH led to complement activation in endothelial cells.
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Affiliation(s)
- Jiaqian Qi
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China.,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China
| | - Tingting Pan
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China.,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China
| | - Tao You
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China
| | - Yaqiong Tang
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China.,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China
| | - Tiantian Chu
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Jia Chen
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China.,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China
| | - Yi Fan
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China.,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China
| | - Shuhong Hu
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China.,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China
| | - Fei Yang
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China.,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China
| | - Changgeng Ruan
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China.,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China
| | - Depei Wu
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China.,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China
| | - Yue Han
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China.,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China.,State Key Laboratory of Radiation Medicine and Protection, Soochow University, Suzhou, China
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5
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Florentin J, O'Neil SP, Ohayon LL, Uddin A, Vasamsetti SB, Arunkumar A, Ghosh S, Boatz JC, Sui J, Kliment CR, Chan SY, Dutta P. VEGF Receptor 1 Promotes Hypoxia-Induced Hematopoietic Progenitor Proliferation and Differentiation. Front Immunol 2022; 13:882484. [PMID: 35634304 PMCID: PMC9133347 DOI: 10.3389/fimmu.2022.882484] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 04/19/2022] [Indexed: 11/13/2022] Open
Abstract
Although it is well known that hypoxia incites unleashed cellular inflammation, the mechanisms of exaggerated cellular inflammation in hypoxic conditions are not known. We observed augmented proliferation of hematopoietic stem and progenitor cells (HSPC), precursors of inflammatory leukocytes, in mice under hypoxia. Consistently, a transcriptomic analysis of human HSPC exposed to hypoxic conditions revealed elevated expression of genes involved in progenitor proliferation and differentiation. Additionally, bone marrow cells in mice expressed high amount of vascular endothelial growth factor (VEGF), and HSPC elevated VEGF receptor 1 (VEGFr1) and its target genes in hypoxic conditions. In line with this, VEGFr1 blockade in vivo and in vitro decreased HSPC proliferation and attenuated inflammation. In silico and ChIP experiments demonstrated that HIF-1α binds to the promoter region of VEGFR1. Correspondingly, HIF1a silencing decreased VEGFr1 expression in HSPC and diminished their proliferation. These results indicate that VEGF signaling in HSPC is an important mediator of their proliferation and differentiation in hypoxia-induced inflammation and represents a potential therapeutic target to prevent aberrant inflammation in hypoxia-associated diseases.
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Affiliation(s)
- Jonathan Florentin
- Division of Cardiology, Department of Medicine, Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Scott P O'Neil
- Division of Cardiology, Department of Medicine, Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Lee L Ohayon
- Division of Cardiology, Department of Medicine, Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Afaz Uddin
- Division of Cardiology, Department of Medicine, Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Sathish Babu Vasamsetti
- Division of Cardiology, Department of Medicine, Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Anagha Arunkumar
- Division of Cardiology, Department of Medicine, Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Samit Ghosh
- Department of Medicine, Division of Pulmonary and Critical Care, University of Pittsburgh, Pittsburgh, PA, United States
| | - Jennifer C Boatz
- Department of Medicine, Division of Pulmonary and Critical Care, University of Pittsburgh, Pittsburgh, PA, United States
| | - Justin Sui
- Department of Medicine, Division of Pulmonary and Critical Care, University of Pittsburgh, Pittsburgh, PA, United States
| | - Corrine R Kliment
- Department of Medicine, Division of Pulmonary and Critical Care, University of Pittsburgh, Pittsburgh, PA, United States
| | - Stephen Y Chan
- Division of Cardiology, Department of Medicine, Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Partha Dutta
- Division of Cardiology, Department of Medicine, Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
- Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
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6
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Abstract
The regulatory mechanism of hypoxia-inducible factor-1α (HIF-1α) is complex. HIF-1α may inhibit or promote apoptosis in osteoblasts under different physiological conditions, and induce bone regeneration and repair injury in coordination with angiogenesis. The relationship between H2O2 and HIFs is complex, and this study aimed to explore the role of HIF-1α in H2O2-induced apoptosis. Dimethyloxallyl glycine (DMOG) and 2-Methoxyestradiol (2ME) were used to stabilize and inhibit HIFs, respectively. Cell viability was assessed with CCK8. Apoptosis and ROS levels were detected by flow cytometry, and HIF mRNA expression was assessed by reverse transcription-polymerase chain reaction (RT-PCR). Western blot was performed to detect HIF-1α, HIF-2α, Bax, Bak, Bcl-2, Bcl-XL, caspase-9, and PCNA protein amounts. Our data suggest that both HIF-1α and HIF-2α play a protective role in oxidative stress. HIF-1α reduces H2O2-induced apoptosis by upregulating Bcl-2 and Bcl-XL, downregulating Bax, Bak, and caspase-9, stabilizing intracellular ROS levels, and promoting the repair of H2O2-induced DNA damage to reduce apoptosis.
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Affiliation(s)
- Xiaohui Wang
- Department of Hematology, The First Affiliated Hospital of Guangxi Medical University, Nanning, PR China
| | - Lili Wei
- General Geriatrics Division, The First Affiliated Hospital of Guangxi Medical University, Nanning, PR China
| | - Qiaochuan Li
- Department of Hematology, The First Affiliated Hospital of Guangxi Medical University, Nanning, PR China
| | - Yongrong Lai
- Department of Hematology, The First Affiliated Hospital of Guangxi Medical University, Nanning, PR China
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7
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Itkin T, Rafii S. Cardiovascular diseases disrupt the bone-marrow niche. Nature 2022; 601:515-517. [PMID: 34949859 DOI: 10.1038/d41586-021-03550-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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8
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Yao Y, Li F, Huang J, Jin J, Wang H. Leukemia stem cell-bone marrow microenvironment interplay in acute myeloid leukemia development. Exp Hematol Oncol 2021; 10:39. [PMID: 34246314 PMCID: PMC8272391 DOI: 10.1186/s40164-021-00233-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 07/02/2021] [Indexed: 12/18/2022] Open
Abstract
Despite the advances in intensive chemotherapy regimens and targeted therapies, overall survival (OS) of acute myeloid leukemia (AML) remains unfavorable due to inevitable chemotherapy resistance and high relapse rate, which mainly caused by the persistence existence of leukemia stem cells (LSCs). Bone marrow microenvironment (BMM), the home of hematopoiesis, has been considered to play a crucial role in both hematopoiesis and leukemogenesis. When interrupted by the AML cells, a malignant BMM formed and thus provided a refuge for LSCs and protecting them from the cytotoxic effects of chemotherapy. In this review, we summarized the alterations in the bidirectional interplay between hematopoietic cells and BMM in the normal/AML hematopoietic environment, and pointed out the key role of these alterations in pathogenesis and chemotherapy resistance of AML. Finally, we focused on the current potential BMM-targeted strategies together with future prospects and challenges. Accordingly, while further research is necessary to elucidate the underlying mechanisms behind LSC–BMM interaction, targeting the interaction is perceived as a potential therapeutic strategy to eradicate LSCs and ultimately improve the outcome of AML.
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Affiliation(s)
- Yiyi Yao
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, Zhejiang, People's Republic of China.,Zhejiang Provincial Key Lab of Hematopoietic Malignancy, Zhejiang University, Hangzhou, 310003, Zhejiang, People's Republic of China
| | - Fenglin Li
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, Zhejiang, People's Republic of China.,Zhejiang Provincial Key Lab of Hematopoietic Malignancy, Zhejiang University, Hangzhou, 310003, Zhejiang, People's Republic of China
| | - Jiansong Huang
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, Zhejiang, People's Republic of China.,Zhejiang Provincial Key Lab of Hematopoietic Malignancy, Zhejiang University, Hangzhou, 310003, Zhejiang, People's Republic of China
| | - Jie Jin
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, Zhejiang, People's Republic of China. .,Zhejiang Provincial Key Lab of Hematopoietic Malignancy, Zhejiang University, Hangzhou, 310003, Zhejiang, People's Republic of China. .,Zhejiang Laboratory for Systems & Precision Medicine, Zhejiang University Medical Center, Hangzhou, 310000, Zhejiang, People's Republic of China.
| | - Huafeng Wang
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, Zhejiang, People's Republic of China. .,Zhejiang Provincial Key Lab of Hematopoietic Malignancy, Zhejiang University, Hangzhou, 310003, Zhejiang, People's Republic of China. .,Zhejiang Laboratory for Systems & Precision Medicine, Zhejiang University Medical Center, Hangzhou, 310000, Zhejiang, People's Republic of China.
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9
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Xiong S, Chng WJ, Zhou J. Crosstalk between endoplasmic reticulum stress and oxidative stress: a dynamic duo in multiple myeloma. Cell Mol Life Sci 2021; 78:3883-3906. [PMID: 33599798 PMCID: PMC8106603 DOI: 10.1007/s00018-021-03756-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 12/19/2020] [Accepted: 01/05/2021] [Indexed: 02/07/2023]
Abstract
Under physiological and pathological conditions, cells activate the unfolded protein response (UPR) to deal with the accumulation of unfolded or misfolded proteins in the endoplasmic reticulum. Multiple myeloma (MM) is a hematological malignancy arising from immunoglobulin-secreting plasma cells. MM cells are subject to continual ER stress and highly dependent on the UPR signaling activation due to overproduction of paraproteins. Mounting evidence suggests the close linkage between ER stress and oxidative stress, demonstrated by overlapping signaling pathways and inter-organelle communication pivotal to cell fate decision. Imbalance of intracellular homeostasis can lead to deranged control of cellular functions and engage apoptosis due to mutual activation between ER stress and reactive oxygen species generation through a self-perpetuating cycle. Here, we present accumulating evidence showing the interactive roles of redox homeostasis and proteostasis in MM pathogenesis and drug resistance, which would be helpful in elucidating the still underdefined molecular pathways linking ER stress and oxidative stress in MM. Lastly, we highlight future research directions in the development of anti-myeloma therapy, focusing particularly on targeting redox signaling and ER stress responses.
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Affiliation(s)
- Sinan Xiong
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Republic of Singapore
| | - Wee-Joo Chng
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Republic of Singapore.
- Centre for Translational Medicine, Cancer Science Institute of Singapore, National University of Singapore, 14 Medical Drive, Singapore, 117599, Republic of Singapore.
- Department of Hematology-Oncology, National University Cancer Institute of Singapore (NCIS), The National University Health System (NUHS), 1E, Kent Ridge Road, Singapore, 119228, Republic of Singapore.
| | - Jianbiao Zhou
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Republic of Singapore.
- Centre for Translational Medicine, Cancer Science Institute of Singapore, National University of Singapore, 14 Medical Drive, Singapore, 117599, Republic of Singapore.
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10
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Ishii S, Suzuki T, Wakahashi K, Asada N, Kawano Y, Kawano H, Sada A, Minagawa K, Nakamura Y, Mizuno S, Takahashi S, Matsui T, Katayama Y. FGF-23 from erythroblasts promotes hematopoietic progenitor mobilization. Blood 2021; 137:1457-1467. [PMID: 33512467 DOI: 10.1182/blood.2020007172] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 12/15/2020] [Indexed: 12/26/2022] Open
Abstract
Fibroblast growth factor 23 (FGF-23) hormone is produced by bone-embedded osteocytes and regulates phosphate homeostasis in kidneys. We found that administration of granulocyte colony-stimulating factor (G-CSF) to mice induced a rapid, substantial increase in FGF-23 messenger RNA in bone marrow (BM) cells. This increase originated mainly from CD45-Ter119+CD71+ erythroblasts. FGF-23 protein in BM extracellular fluid was markedly increased during G-CSF-induced hematopoietic progenitor cell (HPC) mobilization, but remained stable in the blood, with no change in the phosphate level. Consistent with the BM hypoxia induced by G-CSF, low oxygen concentration induced FGF-23 release from human erythroblast HUDEP-2 cells in vitro. The efficient mobilization induced by G-CSF decreased drastically in both FGF-23-/- and chimeric mice with FGF-23 deficiency, only in hematopoietic cells, but increased in osteocyte-specific FGF-23-/- mice. This finding suggests that erythroblast-derived, but not bone-derived, FGF-23 is needed to release HPCs from BM into the circulation. Mechanistically, FGF-23 did not influence CXCL-12 binding to CXCR-4 on progenitors but interfered with their transwell migration toward CXCL-12, which was canceled by FGF receptor inhibitors. These results suggest that BM erythroblasts facilitate G-CSF-induced HPC mobilization via FGF-23 production as an intrinsic suppressor of chemoattraction.
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Affiliation(s)
- Shinichi Ishii
- Division of Hematology, Department of Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Tomohide Suzuki
- Division of Hematology, Department of Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kanako Wakahashi
- Division of Hematology, Department of Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Noboru Asada
- Division of Hematology, Department of Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yuko Kawano
- Division of Hematology, Department of Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hiroki Kawano
- Division of Hematology, Department of Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Akiko Sada
- Division of Hematology, Department of Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kentaro Minagawa
- Division of Hematology, Department of Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yukio Nakamura
- Cell Engineering Division, RIKEN BioResource Research Center, Ibaraki, Japan
| | | | - Satoru Takahashi
- Transborder Medical Research Center (TMRC)
- Department of Anatomy and Embryology, Faculty of Medicine
- International Institute for Integrative Sleep Medicine (WPI-IIIS), and
- Life Science Center, Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Tsukuba, Japan; and
| | - Toshimitsu Matsui
- Department of Hematology, Nishiwaki Municipal Hospital, Nishiwaki, Japan
| | - Yoshio Katayama
- Division of Hematology, Department of Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
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11
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Hypoxia Regulates Lymphoid Development of Human Hematopoietic Progenitors. Cell Rep 2020; 29:2307-2320.e6. [PMID: 31747603 DOI: 10.1016/j.celrep.2019.10.050] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 08/29/2019] [Accepted: 10/10/2019] [Indexed: 01/04/2023] Open
Abstract
Hypoxia plays a major role in the physiology of hematopoietic and immune niches. Important clues from works in mouse have paved the way to investigate the role of low O2 levels in hematopoiesis. However, whether hypoxia impacts the initial steps of human lymphopoiesis remains unexplored. Here, we show that hypoxia regulates cellular and metabolic profiles of umbilical cord blood (UCB)-derived hematopoietic progenitor cells. Hypoxia more specifically enhances in vitro lymphoid differentiation potentials of lymphoid-primed multipotent progenitors (LMPPs) and pro-T/natural killer (NK) cells and in vivo B cell potential of LMPPs. In accordance, hypoxia exacerbates the lymphoid gene expression profile through hypoxia-inducible factor (HIF)-1α (for LMPPs) and HIF-2α (for pro-T/NK). Moreover, loss of HIF-1/2α expression seriously impedes NK and B cell production from LMPPs and pro-T/NK. Our study describes how hypoxia contributes to the lymphoid development of human progenitors and reveals the implication of the HIF pathway in LMPPs and pro-T/NK-cell lymphoid identities.
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12
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Abstract
PURPOSE OF REVIEW The aim of the review is to describe recent advances in our understanding of how multiple myeloma interacts with its cellular and molecular neighbours in the bone marrow microenvironment, and how this may provide targets for prognostication and prevention. RECENT FINDINGS The bone marrow microenvironment in myeloma is beginning to yield targets that are amenable to therapy. A number of trials demonstrate some clinical efficacy in heavily pretreated disease. The challenge remains for how and when these therapeutic interventions are of particular benefit early in disease progression. SUMMARY Multiple myeloma is rarely curable and its interactions with the bone marrow microenvironment are evident. However, separating cause from effect remains a challenge. We propose that targeting specific niches within the bone marrow will yield therapies that have the potential for significant benefit in myeloma and may facilitate earlier intervention to disrupt an environment that is permissive for myeloma progression.
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13
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Ikeda S, Abe F, Matsuda Y, Kitadate A, Takahashi N, Tagawa H. Hypoxia-inducible hexokinase-2 enhances anti-apoptotic function via activating autophagy in multiple myeloma. Cancer Sci 2020; 111:4088-4101. [PMID: 32790954 PMCID: PMC7648043 DOI: 10.1111/cas.14614] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 07/30/2020] [Accepted: 08/09/2020] [Indexed: 12/21/2022] Open
Abstract
Multiple myeloma (MM) is an incurable hematopoietic neoplasm derived from plasma cells, and existing in the bone marrow. Recent developments in the field of myeloma onco-biology have enabled the use of proteasome inhibitors (PIs) as key drugs for MM. PIs can increase cell sensitivity to endoplasmic reticulum stress, leading to apoptosis of myeloma cells. PI cannot kill all myeloma cells, however; one reason of this might be activation of autophagy via hypoxic stress in the bone marrow microenvironment. Hypoxia-inducible gene(s) that regulate autophagy may be novel therapeutic target(s) for PI-resistant myeloma cells. Here, a hypoxia-inducible glycolytic enzyme hexokinase-2 (HK2) was demonstrated to contribute by autophagy activation to the acquisition of an anti-apoptotic phenotype in myeloma cells. We found that hypoxic stress led to autophagy activation accompanied by HK2 upregulation in myeloma cells. Under hypoxic conditions, HK2 knockdown inhibited glycolysis and impaired autophagy, inducing apoptosis. The cooperative effects of a PI (bortezomib) against immunodeficient mice inoculated with HK2-knocked down myeloma cells were examined and significant tumor reduction was observed. An HK2 inhibitor, 3-bromopyruvate (3-BrPA), also induced apoptosis under hypoxic rather than normoxic conditions. Further examination of the cooperative effects between 3-BrPA and bortezomib on myeloma cells revealed a significant increase in apoptotic myeloma cells. These results strongly suggested that HK2 regulates the activation of autophagy in hypoxic myeloma cells. Cooperative treatment using PI against a dominant fraction, and HK2 inhibitor against a minor fraction, adapted to the bone marrow microenvironment, may lead to deeper remission for refractory MM.
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Affiliation(s)
- Sho Ikeda
- Department of Hematology, Nephrology, and Rheumatology, Akita University Graduate School of Medicine, Akita, Japan
| | - Fumito Abe
- Department of Hematology, Nephrology, and Rheumatology, Akita University Graduate School of Medicine, Akita, Japan
| | - Yuka Matsuda
- Department of Life Science, Akita University Graduate School of Engineering Science, Akita, Japan
| | - Akihiro Kitadate
- Department of Hematology, Nephrology, and Rheumatology, Akita University Graduate School of Medicine, Akita, Japan
| | - Naoto Takahashi
- Department of Hematology, Nephrology, and Rheumatology, Akita University Graduate School of Medicine, Akita, Japan
| | - Hiroyuki Tagawa
- Department of Hematology, Nephrology, and Rheumatology, Akita University Graduate School of Medicine, Akita, Japan
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14
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Liesveld JL, Sharma N, Aljitawi OS. Stem cell homing: From physiology to therapeutics. Stem Cells 2020; 38:1241-1253. [PMID: 32526037 DOI: 10.1002/stem.3242] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 05/20/2020] [Accepted: 05/24/2020] [Indexed: 12/13/2022]
Abstract
Stem cell homing is a multistep endogenous physiologic process that is also used by exogenously administered hematopoietic stem and progenitor cells (HSPCs). This multistep process involves cell migration and is essential for hematopoietic stem cell transplantation. The process can be manipulated to enhance ultimate engraftment potential, and understanding stem cell homing is also important to the understanding of stem cell mobilization. Homing is also of potential importance in the recruitment of marrow mesenchymal stem and stromal cells (MSCs) to sites of injury and regeneration. This process is less understood but assumes importance when these cells are used for repair purposes. In this review, the process of HSPC and MSC homing is examined, as are methods to enhance this process.
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Affiliation(s)
- Jane L Liesveld
- James P. Wilmot Cancer Institute, Department of Medicine, University of Rochester, Rochester, New York, USA
| | - Naman Sharma
- James P. Wilmot Cancer Institute, Department of Medicine, University of Rochester, Rochester, New York, USA
| | - Omar S Aljitawi
- James P. Wilmot Cancer Institute, Department of Medicine, University of Rochester, Rochester, New York, USA
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15
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Snoeck HW. Calcium regulation of stem cells. EMBO Rep 2020; 21:e50028. [PMID: 32419314 DOI: 10.15252/embr.202050028] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 03/14/2020] [Accepted: 04/03/2020] [Indexed: 12/14/2022] Open
Abstract
Pluripotent and post-natal, tissue-specific stem cells share functional features such as the capacity to differentiate into multiple lineages and to self-renew, and are endowed with specific cell maintenance mechanism as well as transcriptional and epigenetic signatures that determine stem cell identity and distinguish them from their progeny. Calcium is a highly versatile and ubiquitous second messenger that regulates a wide variety of cellular functions. Specific roles of calcium in stem cell niches and stem cell maintenance mechanisms are only beginning to be explored, however. In this review, I discuss stem cell-specific regulation and roles of calcium, focusing on its potential involvement in the intertwined metabolic and epigenetic regulation of stem cells.
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Affiliation(s)
- Hans-Willem Snoeck
- Columbia Center of Human Development, Columbia University Irving Medical Center, New York, NY, USA.,Division of Pulmonary Medicine, Allergy and Critical Care, Columbia University Irving Medical Center, New York, NY, USA.,Department of Medicine, Columbia University Irving Medical Center, New York, NY, USA.,Department of Microbiology and Immunology, Columbia University Irving Medical Center, New York, NY, USA
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16
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Zhang J, Supakorndej T, Krambs JR, Rao M, Abou-Ezzi G, Ye RY, Li S, Trinkaus K, Link DC. Bone marrow dendritic cells regulate hematopoietic stem/progenitor cell trafficking. J Clin Invest 2019; 129:2920-2931. [PMID: 31039135 DOI: 10.1172/jci124829] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
A resident population of dendritic cells (DCs) has been identified in murine bone marrow, but its contribution to the regulation of hematopoiesis and establishment of the stem cell niche is largely unknown. Here, we show that murine bone marrow DCs are perivascular and have a type 2 conventional DC (cDC2) immunophenotype. RNA expression analysis of sorted bone marrow DCs shows that expression of many chemokines and chemokine receptors is distinct from that observed in splenic cDC2s, suggesting that bone marrow DCs may represent a unique DC population. A similar population of DCs is present in human bone marrow. Ablation of conventional DCs (cDCs) results in hematopoietic stem/progenitor cell (HSPC) mobilization that is greater than that seen with ablation of bone marrow macrophages, and cDC ablation also synergizes with G-CSF to mobilize HSPCs. Ablation of cDCs is associated with an expansion of bone marrow endothelial cells and increased vascular permeability. CXCR2 expression in sinusoidal endothelial cells and the expression of two CXCR2 ligands, CXCL1 and CXCL2, in the bone marrow are markedly increased following cDC ablation. Treatment of endothelial cells in vitro with CXCL1 induces increased vascular permeability and HSPC transmigration. Finally, we show that HSPC mobilization after cDC ablation is attenuated in mice lacking CXCR2 expression. Collectively, these data suggest that bone marrow DCs play an important role in regulating HSPC trafficking, in part, through regulation of sinusoidal CXCR2 signaling and vascular permeability.
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Affiliation(s)
- Jingzhu Zhang
- Division of Oncology, Department of Medicine, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Teerawit Supakorndej
- Division of Oncology, Department of Medicine, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Joseph R Krambs
- Division of Oncology, Department of Medicine, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Mahil Rao
- Division of Oncology, Department of Medicine, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Grazia Abou-Ezzi
- Division of Oncology, Department of Medicine, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Rachel Y Ye
- Division of Oncology, Department of Medicine, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Sidan Li
- Division of Oncology, Department of Medicine, Washington University School of Medicine, Saint Louis, Missouri, USA.,Hematology Oncology Center, Beijing Children's Hospital, National Center for Children's Health, Capital Medical University, Beijing, China
| | - Kathryn Trinkaus
- Biostatistics Shared Resource, Siteman Cancer Center, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Daniel C Link
- Division of Oncology, Department of Medicine, Washington University School of Medicine, Saint Louis, Missouri, USA
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17
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Travelli C, Consonni FM, Sangaletti S, Storto M, Morlacchi S, Grolla AA, Galli U, Tron GC, Portararo P, Rimassa L, Pressiani T, Mazzone M, Trovato R, Ugel S, Bronte V, Tripodo C, Colombo MP, Genazzani AA, Sica A. Nicotinamide Phosphoribosyltransferase Acts as a Metabolic Gate for Mobilization of Myeloid-Derived Suppressor Cells. Cancer Res 2019; 79:1938-1951. [PMID: 30777853 DOI: 10.1158/0008-5472.can-18-1544] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Revised: 12/31/2018] [Accepted: 02/13/2019] [Indexed: 11/16/2022]
Abstract
Cancer induces alteration of hematopoiesis to fuel disease progression. We report that in tumor-bearing mice the macrophage colony-stimulating factor elevates the myeloid cell levels of nicotinamide phosphoribosyltransferase (NAMPT), the rate-limiting enzyme in the NAD salvage pathway, which acts as negative regulator of the CXCR4 retention axis of hematopoietic cells in the bone marrow. NAMPT inhibits CXCR4 through a NAD/Sirtuin 1-mediated inactivation of HIF1α-driven CXCR4 gene transcription, leading to mobilization of immature myeloid-derived suppressor cells (MDSC) and enhancing their production of suppressive nitric oxide. Pharmacologic inhibition or myeloid-specific ablation of NAMPT prevented MDSC mobilization, reactivated specific antitumor immunity, and enhanced the antitumor activity of immune checkpoint inhibitors. Our findings identify NAMPT as a metabolic gate of MDSC precursor function, providing new opportunities to reverse tumor immunosuppression and to restore clinical efficacy of immunotherapy in patients with cancer. SIGNIFICANCE: These findings identify NAMPT as a metabolic gate of MDSC precursor function, providing new opportunities to reverse tumor immunosuppression and to restore clinical efficacy of immunotherapy in cancer patients.
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Affiliation(s)
- Cristina Travelli
- Department of Pharmaceutical Sciences, University of Eastern Piedmont, Novara, Italy.,Department of Pharmaceutical Sciences, University of Pavia, Pavia, Italy
| | - Francesca Maria Consonni
- Department of Inflammation and Immunology, Humanitas Clinical and Research Center, Rozzano, Milan, Italy
| | - Sabina Sangaletti
- Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori, Milano, Italy
| | - Mariangela Storto
- Department of Inflammation and Immunology, Humanitas Clinical and Research Center, Rozzano, Milan, Italy
| | - Sara Morlacchi
- Department of Inflammation and Immunology, Humanitas Clinical and Research Center, Rozzano, Milan, Italy
| | - Ambra A Grolla
- Department of Pharmaceutical Sciences, University of Eastern Piedmont, Novara, Italy
| | - Ubaldina Galli
- Department of Pharmaceutical Sciences, University of Eastern Piedmont, Novara, Italy
| | - Gian Cesare Tron
- Department of Pharmaceutical Sciences, University of Eastern Piedmont, Novara, Italy
| | - Paola Portararo
- Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori, Milano, Italy
| | - Lorenza Rimassa
- Medical Oncology and Hematology Unit, Humanitas Cancer Center, Humanitas Clinical and Research Center, Rozzano, Milan, Italy
| | - Tiziana Pressiani
- Medical Oncology and Hematology Unit, Humanitas Cancer Center, Humanitas Clinical and Research Center, Rozzano, Milan, Italy
| | - Massimiliano Mazzone
- Laboratory of Tumor Inflammation and Angiogenesis, Department of Oncology, Vesalius Research Center, VIB, Leuven, Belgium
| | - Rosalinda Trovato
- Department of Medicine, Section of Immunology, University of Verona, Verona, Italy
| | - Stefano Ugel
- Department of Medicine, Section of Immunology, University of Verona, Verona, Italy
| | - Vincenzo Bronte
- Department of Medicine, Section of Immunology, University of Verona, Verona, Italy
| | - Claudio Tripodo
- Human Pathology Section, Department of Health Sciences, University of Palermo, Palermo, Italy.,Tumor and Microenvironment Histopathology Unit, the FIRC Institute of Molecular Medicine (IFOM), Milan, Italy
| | - Mario P Colombo
- Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori, Milano, Italy
| | - Armando A Genazzani
- Department of Pharmaceutical Sciences, University of Eastern Piedmont, Novara, Italy.
| | - Antonio Sica
- Department of Pharmaceutical Sciences, University of Eastern Piedmont, Novara, Italy. .,Department of Inflammation and Immunology, Humanitas Clinical and Research Center, Rozzano, Milan, Italy
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18
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Wielockx B, Grinenko T, Mirtschink P, Chavakis T. Hypoxia Pathway Proteins in Normal and Malignant Hematopoiesis. Cells 2019; 8:cells8020155. [PMID: 30781787 PMCID: PMC6406588 DOI: 10.3390/cells8020155] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 02/06/2019] [Accepted: 02/08/2019] [Indexed: 12/25/2022] Open
Abstract
The regulation of oxygen (O₂) levels is crucial in embryogenesis and adult life, as O₂ controls a multitude of key cellular functions. Low oxygen levels (hypoxia) are relevant for tissue physiology as they are integral to adequate metabolism regulation and cell fate. Hence, the hypoxia response is of utmost importance for cell, organ and organism function and is dependent on the hypoxia-inducible factor (HIF) pathway. HIF pathway activity is strictly regulated by the family of oxygen-sensitive HIF prolyl hydroxylase domain (PHD) proteins. Physiologic hypoxia is a hallmark of the hematopoietic stem cell (HSC) niche in the bone marrow. This niche facilitates HSC quiescence and survival. The present review focuses on current knowledge and the many open questions regarding the impact of PHDs/HIFs and other proteins of the hypoxia pathway on the HSC niche and on normal and malignant hematopoiesis.
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Affiliation(s)
- Ben Wielockx
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, 01307 Dresden, Germany.
| | - Tatyana Grinenko
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, 01307 Dresden, Germany.
| | - Peter Mirtschink
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, 01307 Dresden, Germany.
| | - Triantafyllos Chavakis
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, 01307 Dresden, Germany.
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19
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Bisht K, Brunck ME, Matsumoto T, McGirr C, Nowlan B, Fleming W, Keech T, Magor G, Perkins AC, Davies J, Walkinshaw G, Flippin L, Winkler IG, Levesque JP. HIF prolyl hydroxylase inhibitor FG-4497 enhances mouse hematopoietic stem cell mobilization via VEGFR2/KDR. Blood Adv 2019; 3:406-418. [PMID: 30733301 PMCID: PMC6373754 DOI: 10.1182/bloodadvances.2018017566] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Accepted: 01/06/2019] [Indexed: 02/06/2023] Open
Abstract
In normoxia, hypoxia-inducible transcription factors (HIFs) are rapidly degraded within the cytoplasm as a consequence of their prolyl hydroxylation by oxygen-dependent prolyl hydroxylase domain (PHD) enzymes. We have previously shown that hematopoietic stem and progenitor cells (HSPCs) require HIF-1 for effective mobilization in response to granulocyte colony-stimulating factor (G-CSF) and CXCR4 antagonist AMD3100/plerixafor. Conversely, HIF PHD inhibitors that stabilize HIF-1 protein in vivo enhance HSPC mobilization in response to G-CSF or AMD3100 in a cell-intrinsic manner. We now show that extrinsic mechanisms involving vascular endothelial growth factor receptor-2 (VEGFR2), via bone marrow (BM) endothelial cells, are also at play. PTK787/vatalanib, a tyrosine kinase inhibitor selective for VEGFR1 and VEGFR2, and neutralizing anti-VEGFR2 monoclonal antibody DC101 blocked enhancement of HSPC mobilization by FG-4497. VEGFR2 was absent on mesenchymal and hematopoietic cells and was detected only in Sca1+ endothelial cells in the BM. We propose that HIF PHD inhibitor FG-4497 enhances HSPC mobilization by stabilizing HIF-1α in HSPCs as previously demonstrated, as well as by activating VEGFR2 signaling in BM endothelial cells, which facilitates HSPC egress from the BM into the circulation.
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Affiliation(s)
- Kavita Bisht
- Cancer Care and Biology Program, Mater Research Institute-The University of Queensland, Translational Research Institute, Woolloongabba, QLD, Australia
| | - Marion E Brunck
- Cancer Care and Biology Program, Mater Research Institute-The University of Queensland, Translational Research Institute, Woolloongabba, QLD, Australia
| | - Taichi Matsumoto
- Cancer Care and Biology Program, Mater Research Institute-The University of Queensland, Translational Research Institute, Woolloongabba, QLD, Australia
- Faculty of Pharmacological Sciences, Fukuoka University, Fukuoka, Japan
| | - Crystal McGirr
- Cancer Care and Biology Program, Mater Research Institute-The University of Queensland, Translational Research Institute, Woolloongabba, QLD, Australia
| | - Bianca Nowlan
- Cancer Care and Biology Program, Mater Research Institute-The University of Queensland, Translational Research Institute, Woolloongabba, QLD, Australia
| | - Whitney Fleming
- Cancer Care and Biology Program, Mater Research Institute-The University of Queensland, Translational Research Institute, Woolloongabba, QLD, Australia
| | - Thomas Keech
- Cancer Care and Biology Program, Mater Research Institute-The University of Queensland, Translational Research Institute, Woolloongabba, QLD, Australia
| | - Graham Magor
- Cancer Care and Biology Program, Mater Research Institute-The University of Queensland, Translational Research Institute, Woolloongabba, QLD, Australia
| | - Andrew C Perkins
- Cancer Care and Biology Program, Mater Research Institute-The University of Queensland, Translational Research Institute, Woolloongabba, QLD, Australia
| | - Julie Davies
- Cancer Care and Biology Program, Mater Research Institute-The University of Queensland, Translational Research Institute, Woolloongabba, QLD, Australia
| | | | | | - Ingrid G Winkler
- Cancer Care and Biology Program, Mater Research Institute-The University of Queensland, Translational Research Institute, Woolloongabba, QLD, Australia
- Faculty of Medicine, The University of Queensland, Herston, QLD, Australia
| | - Jean-Pierre Levesque
- Cancer Care and Biology Program, Mater Research Institute-The University of Queensland, Translational Research Institute, Woolloongabba, QLD, Australia
- Faculty of Medicine, The University of Queensland, Herston, QLD, Australia
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20
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From zero to sixty and back to zero again: the metabolic life of B cells. Curr Opin Immunol 2018; 57:1-7. [PMID: 30312894 DOI: 10.1016/j.coi.2018.09.019] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 09/26/2018] [Accepted: 09/26/2018] [Indexed: 12/17/2022]
Abstract
Throughout their lifetimes B cells shift metabolic gears to move rapidly from quiescent states to full out proliferative expansion and back again. Here we discuss recent findings that shed light on how B cells rapidly shift gears to metabolically fuel expansion and then just as rapidly down shift during phases of receptor rearrangements to ensure genome stability. We also discuss the link between metabolic activity and fate decisions in B cells.
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21
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Nguyen DC, Garimalla S, Xiao H, Kyu S, Albizua I, Galipeau J, Chiang KY, Waller EK, Wu R, Gibson G, Roberson J, Lund FE, Randall TD, Sanz I, Lee FEH. Factors of the bone marrow microniche that support human plasma cell survival and immunoglobulin secretion. Nat Commun 2018; 9:3698. [PMID: 30209264 PMCID: PMC6135805 DOI: 10.1038/s41467-018-05853-7] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 07/12/2018] [Indexed: 01/10/2023] Open
Abstract
Human antibody-secreting cells (ASC) in peripheral blood are found after vaccination or infection but rapidly apoptose unless they migrate to the bone marrow (BM). Yet, elements of the BM microenvironment required to sustain long-lived plasma cells (LLPC) remain elusive. Here, we identify BM factors that maintain human ASC > 50 days in vitro. The critical components of the cell-free in vitro BM mimic consist of products from primary BM mesenchymal stromal cells (MSC), a proliferation-inducing ligand (APRIL), and hypoxic conditions. Comparative analysis of protein-protein interactions between BM-MSC proteomics with differential RNA transcriptomics of blood ASC and BM LLPC identify two major survival factors, fibronectin and YWHAZ. The MSC secretome proteins and hypoxic conditions play a role in LLPC survival utilizing mechanisms that downregulate mTORC1 signaling and upregulate hypoxia signatures. In summary, we identify elements of the BM survival niche critical for maturation of blood ASC to BM LLPC.
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Affiliation(s)
- Doan C Nguyen
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Emory University, Atlanta, GA, USA
| | - Swetha Garimalla
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA
| | - Haopeng Xiao
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, USA
| | - Shuya Kyu
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Emory University, Atlanta, GA, USA
| | - Igor Albizua
- Department of Human Genetics, Emory University, Atlanta, GA, USA
| | - Jacques Galipeau
- Department of Medicine & University of Wisconsin Carbone Cancer Center, University of Wisconsin in Madison, Madison, WI, USA
| | - Kuang-Yueh Chiang
- Division of Hematology & Oncology, University of Toronto, Toronto, ON, Canada
| | - Edmund K Waller
- Pediatrics & Hematology/Oncology, Emory University, Atlanta, GA, USA
| | - Ronghu Wu
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, USA
| | - Greg Gibson
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA
| | - James Roberson
- Department of Orthopedics, Emory University, Atlanta, GA, USA
| | - Frances E Lund
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Troy D Randall
- Division of Clinical Immunology & Rheumatology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Iñaki Sanz
- Division of Rheumatology, Emory University, Atlanta, GA, USA
- Lowance Center for Human Immunology, Emory University, Atlanta, GA, USA
| | - F Eun-Hyung Lee
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Emory University, Atlanta, GA, USA.
- Lowance Center for Human Immunology, Emory University, Atlanta, GA, USA.
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22
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Mitochondrial regulation of hematopoietic stem cells. Curr Opin Cell Biol 2018; 49:91-98. [PMID: 29309987 DOI: 10.1016/j.ceb.2017.12.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 12/12/2017] [Accepted: 12/16/2017] [Indexed: 12/16/2022]
Abstract
Hematopoietic stem cells (HSCs) preferentially use glycolysis rather than mitochondrial oxidative phosphorylation for energy production. While glycolysis in HSC is typically viewed as response to a hypoxic bone marrow environment that protects HSC from damaging reactive oxygen species, other interpretations are possible. Furthermore, recent evidence directly supports a critical role for mitochondria in the maintenance and function of HSCs that goes beyond ATP production. Here, we review recent advances in our understanding of metabolism and the role of mitochondria in the biology of HSCs.
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23
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Pan T, Wang Q, Zhu L, Qi J, You T, Han Y. Downregulation of hypoxia-inducible factor-1α contributes to impaired megakaryopoiesis in immune thrombocytopenia. Thromb Haemost 2017; 117:1875-1886. [DOI: 10.1160/th17-03-0155] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 06/23/2017] [Indexed: 01/15/2023]
Abstract
SummaryImpaired megakaryocyte maturation and exaggerated platelet destruction play a pivotal role in the pathogenesis of immune thrombocytopenia (ITP). Previous studies have shown that HIF-1α promotes the homing and engraftment of haematopoietic stem cells (HSCs), thereby stimulating HSC differentiation. However, whether HIF-1α plays a role in megakaryocytic maturation and platelet destruction in ITP remains elusive. Using enzyme-linked immunosorbent assays (ELISAs), we demonstrated that there were lower HIF-1α levels in the bone marrow (BM) of ITP patients than in that of healthy donors and patients with chemotherapy-related thrombocytopenia. Subjects with lower megakaryocyte (<100/slide) and platelet (<30 × 109/L) counts exhibited significantly decreased BM HIF-1α levels, compared to those with higher megakaryocyte (≥100/slide) and platelet (≥30 × 109/L) counts. To test whether HIF-1α regulates megakaryopoiesis and platelet production, megakaryocytes derived from mouse BM cells were treated with an HIF-1α activator (IOX-2; 50 µM) or inhibitor (PX-478; 50 µM). PX-478 significantly decreased HIF-1α expression, cell size, and the populations of CD41-positive and high-ploidy cells. Importantly, to evaluate the role of HIF-1α as a potential therapeutic target in ITP, mouse BM cells were incubated with plasma from ITP patients in the presence or absence of IOX-2. IOX-2 significantly attenuated the ITP plasma-induced decrease in cell size as well as the proportions of CD41-positive and high-ploidy cells. In addition, IOX-2 increased the number of megakaryocytes from mouse BM cells treated with ITP plasma. Our findings indicate that decreased HIF-1α may contribute to impaired megakaryopoiesis in ITP, and HIF-1α may provide a potential therapy for ITP patients.Supplementary Material to this article is available online at www.thrombosis-online.com.
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24
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Rottensteiner-Brandl U, Distel L, Stumpf M, Fey T, Köhn K, Bertram U, Lingens LF, Greil P, Horch RE, Arkudas A. Influence of Different Irradiation Protocols on Vascularization and Bone Formation Parameters in Rat Femora. Tissue Eng Part C Methods 2017; 23:583-591. [PMID: 28741426 DOI: 10.1089/ten.tec.2017.0170] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Aim of the present study was the establishment of an efficient and reproducible model for irradiation of rat femora as a model for impaired osteogenesis and angiogenesis. Four different irradiation protocols were compared: single irradiation of the left femur with 20 Gy and explantation after 4 or 8 weeks (group A, B) and three irradiation fractions at 3-4 days intervals with 10 Gy and explantation after 4 or 8 weeks (group C, D). The contralateral, unirradiated femur served as control. Evaluation included histology, microcomputertomography (μCT), and real-time polymerase chain reaction. Histology showed a pronounced increase of vacuoles in bone marrow after irradiation, especially after 4 weeks (group A and C), demonstrating bone marrow edema and fatty degeneration. Irradiation provoked a decrease of total cell numbers in cortical bone and of hypoxia-inducible factor 1 alpha (HIF1α)-positive cells in bone marrow. The expression of several markers (osteocalcin [OCN], runt-related transcription factor 2 [RUNX2], transforming growth factor beta 1 [TGFβ1], tumor necrosis factor alpha [TNFα], vascular endothelial growth factor A [VEGFA], and HIF1α) was decreased in group A after irradiation. This might suggest a decreased metabolism after irradiation. A significant decrease in small-sized vessels was seen in μCT evaluation in group A and D. Single irradiation with 20 Gy had the most severe and reproducible impact on osteogenesis and angiogenesis after 4 weeks while being well tolerated by all animals, thus making it an excellent model for evaluation of bone healing and vascularization in irradiated tissue.
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Affiliation(s)
- Ulrike Rottensteiner-Brandl
- 1 Department of Plastic and Hand Surgery, University Hospital Erlangen, Friedrich Alexander University Erlangen-Nürnberg FAU , Erlangen, Germany .,2 Department of Biochemistry, Friedrich-Alexander-University Erlangen-Nürnberg FAU , Erlangen, Germany
| | - Luitpold Distel
- 3 Department of Radiation Oncology, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg FAU , Erlangen, Germany
| | - Martin Stumpf
- 4 Department of Materials Science (Glass and Ceramics), Friedrich-Alexander-University Erlangen-Nürnberg FAU , Erlangen, Germany
| | - Tobias Fey
- 4 Department of Materials Science (Glass and Ceramics), Friedrich-Alexander-University Erlangen-Nürnberg FAU , Erlangen, Germany
| | - Katrin Köhn
- 1 Department of Plastic and Hand Surgery, University Hospital Erlangen, Friedrich Alexander University Erlangen-Nürnberg FAU , Erlangen, Germany
| | - Ulf Bertram
- 1 Department of Plastic and Hand Surgery, University Hospital Erlangen, Friedrich Alexander University Erlangen-Nürnberg FAU , Erlangen, Germany
| | - Lara F Lingens
- 1 Department of Plastic and Hand Surgery, University Hospital Erlangen, Friedrich Alexander University Erlangen-Nürnberg FAU , Erlangen, Germany
| | - Peter Greil
- 4 Department of Materials Science (Glass and Ceramics), Friedrich-Alexander-University Erlangen-Nürnberg FAU , Erlangen, Germany
| | - Raymund E Horch
- 1 Department of Plastic and Hand Surgery, University Hospital Erlangen, Friedrich Alexander University Erlangen-Nürnberg FAU , Erlangen, Germany
| | - Andreas Arkudas
- 1 Department of Plastic and Hand Surgery, University Hospital Erlangen, Friedrich Alexander University Erlangen-Nürnberg FAU , Erlangen, Germany
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Salter B, Sehmi R. The role of bone marrow-derived endothelial progenitor cells and angiogenic responses in chronic obstructive pulmonary disease. J Thorac Dis 2017; 9:2168-2177. [PMID: 28840018 DOI: 10.21037/jtd.2017.07.56] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Increased vascularity of the bronchial sub-mucosa is a cardinal feature of chronic obstructive pulmonary disease (COPD) and is associated with disease severity. Capillary engorgement, leakage, and vasodilatation can directly increase airway wall thickness resulting in airway luminal narrowing and facilitate inflammatory cell trafficking, thereby contributing to irreversible airflow obstruction, a characteristic of COPD. Airway wall neovascularisation, seen as increases in both the size and number of bronchial blood vessels is a prominent feature of COPD that correlates with reticular basement membrane thickening and airway obstruction. Sub-epithelial vascularization may be an important remodelling event for airway narrowing and airflow obstruction in COPD. Post-natal angiogenesis is a complex process, whereby new blood vessels sprouting from extant microvasculature, can arise from the proliferation of resident mature vascular endothelial cells (ECs). In addition, this may arise from increased turnover and lung-homing of circulating endothelial progenitor cells (EPCs) from the bone marrow (BM). Following lung-homing, EPCs can differentiate locally within the tissue into ECs, further contributing to vascular repair, maintenance, and expansion under pathological conditions, governed by a locally elaborated milieu of growth factors (GFs). In this article, we will review evidence for the role of BM-derived EPCs in the development of angiogenesis in the lug and discuss how this may relate to the pathogenesis of COPD.
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Affiliation(s)
- Brittany Salter
- CardioRespiratory Research Group, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Roma Sehmi
- CardioRespiratory Research Group, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
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Gerri C, Marín-Juez R, Marass M, Marks A, Maischein HM, Stainier DYR. Hif-1α regulates macrophage-endothelial interactions during blood vessel development in zebrafish. Nat Commun 2017; 8:15492. [PMID: 28524872 PMCID: PMC5493593 DOI: 10.1038/ncomms15492] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 04/01/2017] [Indexed: 12/21/2022] Open
Abstract
Macrophages are known to interact with endothelial cells during developmental and pathological angiogenesis but the molecular mechanisms modulating these interactions remain unclear. Here, we show a role for the Hif-1α transcription factor in this cellular communication. We generated hif-1aa;hif-1ab double mutants in zebrafish, hereafter referred to as hif-1α mutants, and find that they exhibit impaired macrophage mobilization from the aorta-gonad-mesonephros (AGM) region as well as angiogenic defects and defective vascular repair. Importantly, macrophage ablation is sufficient to recapitulate the vascular phenotypes observed in hif-1α mutants, revealing for the first time a macrophage-dependent angiogenic process during development. Further substantiating our observations of vascular repair, we find that most macrophages closely associated with ruptured blood vessels are Tnfα-positive, a key feature of classically activated macrophages. Altogether, our data provide genetic evidence that Hif-1α regulates interactions between macrophages and endothelial cells starting with the mobilization of macrophages from the AGM. The molecular mechanism regulating macrophage interaction with endothelial cells during development is unclear. Here, the authors show that in zebrafish mutation of hypoxia-inducible factor-1α impairs macrophage mobilization from the aorta-gonad-mesonephros, causing defects in angiogenesis and vessel repair.
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Affiliation(s)
- Claudia Gerri
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Rubén Marín-Juez
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Michele Marass
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Alora Marks
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Hans-Martin Maischein
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Didier Y R Stainier
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
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Sica A, Strauss L. Energy metabolism drives myeloid-derived suppressor cell differentiation and functions in pathology. J Leukoc Biol 2017; 102:325-334. [PMID: 28223316 DOI: 10.1189/jlb.4mr1116-476r] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Revised: 12/29/2016] [Accepted: 01/24/2017] [Indexed: 11/24/2022] Open
Abstract
Over the last decade, a heterogeneous population of immature myeloid cells with major regulatory functions has been described in cancer and other pathologic conditions and ultimately defined as MDSCs. Most of the early work on the origins and functions of MDSCs has been in murine and human tumor bearers in which MDSCs are known to be immunosuppressive and to result in both reduced immune surveillance and antitumor cytotoxicity. More recent studies, however, suggest that expansion of these immature myeloid cells may be linked to most, if not all, chronic and acute inflammatory processes. The universal expansion to inflammatory stimuli of MDSCs suggests that these cells may be more of a normal component of the inflammatory response (emergency myelopoiesis) than simply a pathologic response to a growing tumor. Instead of an adverse immunosuppressive response, expansion of these immature myeloid cell populations may result from a complex balance between increased immune surveillance and dampened adaptive immune responses that are common to many inflammatory responses. Within this scenario, new pathways of metabolic reprogramming are emerging as drivers of MDSC differentiation and functions in cancer and inflammatory disorders, crucially linking metabolic syndrome to inflammatory processes.
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Affiliation(s)
- Antonio Sica
- Department of Pharmaceutical Sciences, Università del Piemonte Orientale "Amedeo Avogadro," Novara, Italy; .,Department of Inflammation and Immunology, Humanitas Clinical and Research Center, Rozzano, Milan, Italy
| | - Laura Strauss
- Division of Hematology-Oncology, Harvard Medical School, Boston, Massachusetts, USA
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Krause DS, Scadden DT. A hostel for the hostile: the bone marrow niche in hematologic neoplasms. Haematologica 2016; 100:1376-87. [PMID: 26521296 DOI: 10.3324/haematol.2014.113852] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Our understanding of the biology of the normal hematopoietic stem cell niche has increased steadily due to improved murine models and sophisticated imaging tools. Less well understood, but of growing interest, is the interaction between cells in the bone marrow during the initiation, maintenance and treatment of hematologic neoplasms. This review summarizes the emerging concepts of the normal and leukemic hematopoietic bone marrow niche. Furthermore, it reviews current models of how the microenvironment of the bone marrow may contribute to or be modified by leukemogenesis. Finally, it provides the rationale for a "two-pronged" approach, directly targeting cancer cells themselves while also targeting the bone microenvironment to make it inhospitable to malignant cells and, ultimately, eradicating cancer stem-like cells.
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Affiliation(s)
- Daniela S Krause
- Georg-Speyer-Haus, Institute for Tumor Biology and Experimental Therapy, Frankfurt am Main, Germany
| | - David T Scadden
- Department of Stem Cell and Regenerative Biology and Harvard Stem Cell Institute, Harvard University, Center for Regenerative Medicine and Cancer Center, Massachusetts General Hospital, Boston, USA
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Oxidative stress and hypoxia in normal and leukemic stem cells. Exp Hematol 2016; 44:540-60. [PMID: 27179622 DOI: 10.1016/j.exphem.2016.04.012] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 04/06/2016] [Accepted: 04/09/2016] [Indexed: 12/20/2022]
Abstract
The main hematopoietic stem cell (HSC) functions, self-renewal and differentiation, are finely regulated by both intrinsic mechanisms such as transcriptional and epigenetic regulators and extrinsic signals originating in the bone marrow microenvironment (HSC niche) or in the body (humoral mediators). The interaction between regulatory signals and cellular metabolism is an emerging area. Several metabolic pathways function differently in HSCs compared with progenitors and differentiated cells. Hypoxia, acting through hypoxia-inducing factors, has emerged as a key regulator of stem cell biology and acts by maintaining HSC quiescence and a condition of metabolic dormancy based on anaerobic glycolytic energetic metabolism, with consequent low production reactive oxygen species (ROS) and high antioxidant defense. Hematopoietic cell differentiation is accompanied by changes in oxidative metabolism (decrease of anaerobic glycolysis and increase of oxidative phosphorylation) and increased levels of ROS. Leukemic stem cells, defined as the cells that initiate and maintain the leukemic process, show peculiar metabolic properties in that they are more dependent on oxidative respiration than on glycolysis and are more sensitive to oxidative stress than normal HSCs. Several mitochondrial abnormalities have been described in acute myeloid leukemia (AML) cells, explaining the shift to aerobic glycolysis observed in these cells and offering the unique opportunity for therapeutic metabolic targeting. Finally, frequent mutations of the mitochondrial isocitrate dehydrogenase-2 (IDH2) enzyme are observed in AML cells, in which the mutated enzyme acts as an oncogenic driver and can be targeted using specific inhibitors under clinical evaluation with promising results.
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Chen J, Kang JG, Keyvanfar K, Young NS, Hwang PM. Long-term adaptation to hypoxia preserves hematopoietic stem cell function. Exp Hematol 2016; 44:866-873.e4. [PMID: 27118043 DOI: 10.1016/j.exphem.2016.04.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 04/12/2016] [Accepted: 04/14/2016] [Indexed: 12/16/2022]
Abstract
Molecular oxygen sustains aerobic life, but it also serves as the substrate for oxidative stress, which has been associated with the pathogenesis of disease and with aging. Compared with mice housed in normoxia (21% O2), reducing ambient oxygen to 10% O2 (hypoxia) resulted in increased hematopoietic stem cell (HSC) function as measured by bone marrow (BM) cell engraftment onto lethally irradiated recipients. The number of BM c-Kit(+)Sca-1(+)Lin(-) (KSL) cells as well as the number of cells with other hematopoietic stem and progenitor cell markers were increased in hypoxia mice, whereas the BM cells' colony-forming capacity remained unchanged. KSL cells from hypoxia mice showed a decreased level of oxidative stress and increased expression of transcription factor Gata1 and cytokine receptor c-Mpl, consistent with the observations of increased erythropoiesis and enhanced HSC engraftment. These observations demonstrate the benefit of a hypoxic HSC niche and suggest that hypoxic conditions can be further optimized to preserve stem cell integrity in vivo.
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Affiliation(s)
- Jichun Chen
- Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA.
| | - Ju-Gyeong Kang
- Center for Molecular Medicine, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Keyvan Keyvanfar
- Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Neal S Young
- Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Paul M Hwang
- Center for Molecular Medicine, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA.
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Rouault-Pierre K, Hamilton A, Bonnet D. Effect of hypoxia-inducible factors in normal and leukemic stem cell regulation and their potential therapeutic impact. Expert Opin Biol Ther 2016; 16:463-76. [PMID: 26679619 DOI: 10.1517/14712598.2016.1133582] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
INTRODUCTION Hypoxia inducible factors (HIF-1α and HIF-2α) are the main mediators of hypoxic responses that operate in both normal and pathological conditions. Recent evidence indicates that HIF-1α and HIF-2α could have overlapping, unique and even sometimes opposing activities in both normal physiology and disease. Despite an increase in our understanding of the different pathways regulated by HIF-1α and HIF-2α, the role played by each factor in HSC maintenance and leukemogenesis is still controversial. AREAS COVERED This review summarizes our current understanding of HIF-1α and HIF-2α activities and discusses the implications and challenges of using HIF inhibitors therapeutically in blood malignancies. EXPERT OPINION As HIF inhibitors are currently under clinical evaluation in different cancers, including hematological malignancies, a more thorough understanding of the unique roles performed by HIF-1α and HIF-2α in human neoplasia is warranted.
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Affiliation(s)
- Kevin Rouault-Pierre
- a Haematopoietic Stem Cell Laboratory , The Francis Crick Institute , London , UK
| | - Ashley Hamilton
- a Haematopoietic Stem Cell Laboratory , The Francis Crick Institute , London , UK
| | - Dominique Bonnet
- a Haematopoietic Stem Cell Laboratory , The Francis Crick Institute , London , UK
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Abstract
Unprecedented advances in multiple myeloma (MM) therapy during the last 15 years are predominantly based on our increasing understanding of the pathophysiologic role of the bone marrow (BM) microenvironment. Indeed, new treatment paradigms, which incorporate thalidomide, immunomodulatory drugs (IMiDs), and proteasome inhibitors, target the tumor cell as well as its BM microenvironment. Ongoing translational research aims to understand in more detail how disordered BM-niche functions contribute to MM pathogenesis and to identify additional derived targeting agents. One of the most exciting advances in the field of MM treatment is the emergence of immune therapies including elotuzumab, daratumumab, the immune checkpoint inhibitors, Bispecific T-cell engagers (BiTes), and Chimeric antigen receptor (CAR)-T cells. This chapter will review our knowledge on the pathophysiology of the BM microenvironment and discuss derived novel agents that hold promise to further improve outcome in MM.
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Affiliation(s)
- Michele Moschetta
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Yawara Kawano
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Klaus Podar
- Department of Medical Oncology, National Center for Tumor Diseases (NCT), University of Heidelberg, Heidelberg, Germany.
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Critical Roles of Reactive Oxygen Species in Age-Related Impairment in Ischemia-Induced Neovascularization by Regulating Stem and Progenitor Cell Function. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2015:7095901. [PMID: 26697140 PMCID: PMC4677240 DOI: 10.1155/2016/7095901] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Accepted: 08/12/2015] [Indexed: 12/18/2022]
Abstract
Reactive oxygen species (ROS) regulate bone marrow microenvironment for stem and progenitor cells functions including self-renewal, differentiation, and cell senescence. In response to ischemia, ROS also play a critical role in mediating the mobilization of endothelial progenitor cells (EPCs) from the bone marrow to the sites of ischemic injury, which contributes to postnatal neovascularization. Aging is an unavoidable biological deteriorative process with a progressive decline in physiological functions. It is associated with increased oxidative stress and impaired ischemia-induced neovascularization. This review discusses the roles of ROS in regulating stem and progenitor cell function, highlighting the impact of unbalanced ROS levels on EPC dysfunction and the association with age-related impairment in ischemia-induced neovascularization. Furthermore, it discusses strategies that modulate the oxidative levels of stem and progenitor cells to enhance the therapeutic potential for elderly patients with cardiovascular disease.
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Hypoxia regulates the hematopoietic stem cell niche. Pflugers Arch 2015; 468:13-22. [PMID: 26490456 DOI: 10.1007/s00424-015-1743-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Revised: 09/30/2015] [Accepted: 10/02/2015] [Indexed: 12/17/2022]
Abstract
Bone marrow, the site of hematopoiesis throughout adulthood, is a physiologically hypoxic organ. Thus, various biological oxygen sensors and their signaling cascades play a pivotal role in hematopoietic systems in the bone marrow under both physiologic and pathologic conditions. Hypoxia-inducible factors (HIFs) are hypoxic stress sensor proteins that are stabilized under homeostatic or stress-induced hypoxia. In the hypoxic bone marrow, HIFs play crucial roles in hematopoietic stem cells (HSCs) and in the cells of the HSC niche. The signals downstream of the HIFs maintain HSC quiescence, survival, and metabolic homeostasis through both cell-autonomous and non-cell-autonomous mechanisms. Leukemic stem cells (LSCs) hijack these delicate hypoxia-sensing mechanisms to sustain their self-renewal potential, promoting disease progression and drug resistance even under normoxic conditions. This review focuses on HIF-mediated oxygen-sensing mechanisms of adult HSCs and LSCs and their niche cells in the hypoxic bone marrow.
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35
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Systemic modeling myeloma-osteoclast interactions under normoxic/hypoxic condition using a novel computational approach. Sci Rep 2015; 5:13291. [PMID: 26282073 PMCID: PMC4539608 DOI: 10.1038/srep13291] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 07/20/2015] [Indexed: 12/17/2022] Open
Abstract
Interaction of myeloma cells with osteoclasts (OC) can enhance tumor cell expansion through activation of complex signaling transduction networks. Both cells reside in the bone marrow, a hypoxic niche. How OC-myeloma interaction in a hypoxic environment affects myeloma cell growth and their response to drug treatment is poorly understood. In this study, we i) cultured myeloma cells in the presence/absence of OCs under normoxia and hypoxia conditions and did protein profiling analysis using reverse phase protein array; ii) computationally developed an Integer Linear Programming approach to infer OC-mediated myeloma cell-specific signaling pathways under normoxic and hypoxic conditions. Our modeling analysis indicated that in the presence OCs, (1) cell growth-associated signaling pathways, PI3K/AKT and MEK/ERK, were activated and apoptotic regulatory proteins, BAX and BIM, down-regulated under normoxic condition; (2) β1 Integrin/FAK signaling pathway was activated in myeloma cells under hypoxic condition. Simulation of drug treatment effects by perturbing the inferred cell-specific pathways showed that targeting myeloma cells with the combination of PI3K and integrin inhibitors potentially (1) inhibited cell proliferation by reducing the expression/activation of NF-κB, S6, c-Myc, and c-Jun under normoxic condition; (2) blocked myeloma cell migration and invasion by reducing the expression of FAK and PKC under hypoxic condition.
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Hypoxia inducible factor (HIF)-2α accelerates disease progression in mouse models of leukemia and lymphoma but is not a poor prognosis factor in human AML. Leukemia 2015; 29:2075-85. [DOI: 10.1038/leu.2015.102] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2014] [Revised: 03/12/2015] [Accepted: 03/30/2015] [Indexed: 12/15/2022]
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Schulenburg A, Blatt K, Cerny-Reiterer S, Sadovnik I, Herrmann H, Marian B, Grunt TW, Zielinski CC, Valent P. Cancer stem cells in basic science and in translational oncology: can we translate into clinical application? J Hematol Oncol 2015; 8:16. [PMID: 25886184 PMCID: PMC4345016 DOI: 10.1186/s13045-015-0113-9] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 01/14/2015] [Indexed: 02/08/2023] Open
Abstract
Since their description and identification in leukemias and solid tumors, cancer stem cells (CSC) have been the subject of intensive research in translational oncology. Indeed, recent advances have led to the identification of CSC markers, CSC targets, and the preclinical and clinical evaluation of the CSC-eradicating (curative) potential of various drugs. However, although diverse CSC markers and targets have been identified, several questions remain, such as the origin and evolution of CSC, mechanisms underlying resistance of CSC against various targeted drugs, and the biochemical basis and function of stroma cell-CSC interactions in the so-called ‘stem cell niche.’ Additional aspects that have to be taken into account when considering CSC elimination as primary treatment-goal are the genomic plasticity and extensive subclone formation of CSC. Notably, various cell fractions with different combinations of molecular aberrations and varying proliferative potential may display CSC function in a given neoplasm, and the related molecular complexity of the genome in CSC subsets is considered to contribute essentially to disease evolution and acquired drug resistance. In the current article, we discuss new developments in the field of CSC research and whether these new concepts can be exploited in clinical practice in the future.
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Affiliation(s)
- Axel Schulenburg
- Bone Marrow Transplantation Unit, Department of Internal Medicine I, Medical University of Vienna, Währinger Gürtel 18-20, Vienna, A-1090, Wien, Austria. .,Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Spitalgasse 23, Vienna, 1090, Wien, Austria. .,Department of Medicine I, Stem Cell Transplantation Unit, Medical University of Vienna, Waehringer Guertel 18-20, A-1090, Wien, Austria.
| | - Katharina Blatt
- Department of Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, Währinger Gürtel 18-20, Vienna, 1090, Wien, Austria.
| | - Sabine Cerny-Reiterer
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Spitalgasse 23, Vienna, 1090, Wien, Austria. .,Department of Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, Währinger Gürtel 18-20, Vienna, 1090, Wien, Austria.
| | - Irina Sadovnik
- Department of Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, Währinger Gürtel 18-20, Vienna, 1090, Wien, Austria.
| | - Harald Herrmann
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Spitalgasse 23, Vienna, 1090, Wien, Austria. .,Department of Radiation Therapy, Medical University of Vienna, Spitalgasse 23, Vienna, 1090, Wien, Austria.
| | - Brigitte Marian
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Spitalgasse 23, Vienna, 1090, Wien, Austria. .,Department of Medicine I, Institute for Cancer Research, Medical University of Vienna, Währinger Gürtel 18-20, Vienna, 1090, Wien, Austria.
| | - Thomas W Grunt
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Spitalgasse 23, Vienna, 1090, Wien, Austria. .,Department of Medicine I, Division of Clinical Oncology, Medical University of Vienna, Währinger Gürtel 18-20, Vienna, 1090, Wien, Austria.
| | - Christoph C Zielinski
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Spitalgasse 23, Vienna, 1090, Wien, Austria. .,Department of Medicine I, Division of Clinical Oncology, Medical University of Vienna, Währinger Gürtel 18-20, Vienna, 1090, Wien, Austria.
| | - Peter Valent
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Spitalgasse 23, Vienna, 1090, Wien, Austria. .,Department of Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, Währinger Gürtel 18-20, Vienna, 1090, Wien, Austria.
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HIF-1α is required for hematopoietic stem cell mobilization and 4-prolyl hydroxylase inhibitors enhance mobilization by stabilizing HIF-1α. Leukemia 2015; 29:1366-78. [PMID: 25578474 PMCID: PMC4498452 DOI: 10.1038/leu.2015.8] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 11/28/2014] [Accepted: 12/18/2014] [Indexed: 02/07/2023]
Abstract
Many patients with hematological neoplasms fail to mobilize sufficient numbers of hematopoietic stem cells (HSCs) in response to granulocyte colony-stimulating factor (G-CSF) precluding subsequent autologous HSC transplantation. Plerixafor, a specific antagonist of the chemokine receptor CXCR4, can rescue some but not all patients who failed to mobilize with G-CSF alone. These refractory poor mobilizers cannot currently benefit from autologous transplantation. To discover alternative targetable pathways to enhance HSC mobilization, we studied the role of hypoxia-inducible factor-1α (HIF-1α) and the effect of HIF-1α pharmacological stabilization on HSC mobilization in mice. We demonstrate in mice with HSC-specific conditional deletion of the Hif1a gene that the oxygen-labile transcription factor HIF-1α is essential for HSC mobilization in response to G-CSF and Plerixafor. Conversely, pharmacological stabilization of HIF-1α with the 4-prolyl hydroxylase inhibitor FG-4497 synergizes with G-CSF and Plerixafor increasing mobilization of reconstituting HSCs 20-fold compared with G-CSF plus Plerixafor, currently the most potent mobilizing combination used in the clinic.
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Sammarco MC, Simkin J, Fassler D, Cammack AJ, Wilson A, Van Meter K, Muneoka K. Endogenous bone regeneration is dependent upon a dynamic oxygen event. J Bone Miner Res 2014; 29:2336-45. [PMID: 24753124 PMCID: PMC5828154 DOI: 10.1002/jbmr.2261] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 03/17/2014] [Accepted: 03/31/2014] [Indexed: 11/08/2022]
Abstract
Amputation of the digit tip within the terminal phalangeal bone of rodents, monkeys, and humans results in near-perfect regeneration of bone and surrounding tissues; however, amputations at a more proximal level fail to produce the same regenerative result. Digit regeneration is a coordinated, multifaceted process that incorporates signaling from bioactive growth factors both in the tissue matrix and from several different cell populations. To elucidate the mechanisms involved in bone regeneration we developed a novel multi-tissue slice-culture model that regenerates bone ex vivo via direct ossification. Our study provides an integrated multi-tissue system for bone and digit regeneration and allows us to circumvent experimental limitations that exist in vivo. We used this slice-culture model to evaluate the influence of oxygen on regenerating bone. Micro-computed tomography (µCT) and histological analysis revealed that the regenerative response of the digit is facilitated in part by a dynamic oxygen event, in which mutually exclusive high and low oxygen microenvironments exist and vacillate in a coordinated fashion during regeneration. Areas of increased oxygen are initially seen in the marrow and then surrounding areas of vasculature in the regenerating digit. Major hypoxic events are seen at 7 days postamputation (DPA 7) in the marrow and again at DPA 12 in the blastema, and manipulation of oxygen tensions during these hypoxic phases can shift the dynamics of digit regeneration. Oxygen increased to 21% oxygen tension can either accelerate or attenuate bone mineralization in a stage-specific manner in the regenerative timeline. These studies not only reveal a circumscribed frame of oxygen influence during bone regeneration, but also suggest that oxygen may be one of the primary signaling influences during regeneration.
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Affiliation(s)
- Mimi C Sammarco
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, USA
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40
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Ludin A, Gur-Cohen S, Golan K, Kaufmann KB, Itkin T, Medaglia C, Lu XJ, Ledergor G, Kollet O, Lapidot T. Reactive oxygen species regulate hematopoietic stem cell self-renewal, migration and development, as well as their bone marrow microenvironment. Antioxid Redox Signal 2014; 21:1605-19. [PMID: 24762207 PMCID: PMC4175025 DOI: 10.1089/ars.2014.5941] [Citation(s) in RCA: 225] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
SIGNIFICANCE Blood forming, hematopoietic stem cells (HSCs) mostly reside in the bone marrow in a quiescent, nonmotile state via adhesion interactions with stromal cells and macrophages. Quiescent, proliferating, and differentiating stem cells have different metabolism, and accordingly different amounts of intracellular reactive oxygen species (ROS). Importantly, ROS is not just a byproduct of metabolism, but also plays a role in stem cell state and function. RECENT ADVANCES ROS levels are dynamic and reversibly dictate enhanced cycling and myeloid bias in ROS(high) short-term repopulating stem cells, and ROS(low) quiescent long-term repopulating stem cells. Low levels of ROS, regulated by intrinsic factors such as cell respiration or nicotinamide adenine dinucleotide phosphate-oxidase (NADPH oxidase) activity, or extrinsic factors such as stem cell factor or prostaglandin E2 are required for maintaining stem cell self-renewal. High ROS levels, due to stress and inflammation, induce stem cell differentiation and enhanced motility. CRITICAL ISSUES Stem cells need to be protected from high ROS levels to avoid stem cell exhaustion, insufficient host immunity, and leukemic transformation that may occur during chronic inflammation. However, continuous low ROS production will lead to lack of stem cell function and opportunistic infections. Ultimately, balanced ROS levels are crucial for maintaining the small stem cell pool and host immunity, both in homeostasis and during stress situations. FUTURE DIRECTIONS Deciphering the signaling pathway of ROS in HSC will provide a better understanding of ROS roles in switching HSC from quiescence to activation and vice versa, and will also shed light on the possible roles of ROS in leukemia initiation and development.
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Affiliation(s)
- Aya Ludin
- 1 Department of Immunology, Weizmann Institute of Science , Rehovot, Israel
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Muz B, de la Puente P, Azab F, Luderer M, Azab AK. The role of hypoxia and exploitation of the hypoxic environment in hematologic malignancies. Mol Cancer Res 2014; 12:1347-54. [PMID: 25158954 DOI: 10.1158/1541-7786.mcr-14-0028] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Tumor hypoxia is a well-described phenomenon during the progression of solid tumors affecting cell signaling pathways and cell metabolism; however, its role in hematologic malignancies has not been given the same attention in the literature. Therefore, this review focuses on the comparative differences between solid and hematologic malignancies with emphasis on the role of hypoxia during tumorigenesis and progression. In addition, contribution of the bone marrow and angiogenic environment are also discussed. Insight is provided into the role of hypoxia in metastatic spread, stemness, and drug resistance in hematologic conditions. Finally, emerging therapeutic strategies such as small-molecule prodrugs and hypoxia-inducible factor (HIF) targeting approaches are outlined to combat hypoxic cells and/or adaptive mechanisms in the treatment of hematologic malignancies.
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Affiliation(s)
- Barbara Muz
- Department of Radiation Oncology, Cancer Biology Division, Washington University in Saint Louis School of Medicine, St. Louis, Missouri
| | - Pilar de la Puente
- Department of Radiation Oncology, Cancer Biology Division, Washington University in Saint Louis School of Medicine, St. Louis, Missouri
| | - Feda Azab
- Department of Radiation Oncology, Cancer Biology Division, Washington University in Saint Louis School of Medicine, St. Louis, Missouri
| | - Micah Luderer
- Department of Radiation Oncology, Cancer Biology Division, Washington University in Saint Louis School of Medicine, St. Louis, Missouri
| | - Abdel Kareem Azab
- Department of Radiation Oncology, Cancer Biology Division, Washington University in Saint Louis School of Medicine, St. Louis, Missouri.
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42
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Angelopoulou MK, Tsirkinidis P, Boutsikas G, Vassilakopoulos TP, Tsirigotis P. New insights in the mobilization of hematopoietic stem cells in lymphoma and multiple myeloma patients. BIOMED RESEARCH INTERNATIONAL 2014; 2014:835138. [PMID: 25197663 PMCID: PMC4150414 DOI: 10.1155/2014/835138] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Accepted: 07/12/2014] [Indexed: 12/11/2022]
Abstract
Following chemotherapy and/or the administration of growth factors, such as granulocyte-colony stimulated factor (G-CSF), hematopoietic stem cells (HSC) mobilize from bone marrow to peripheral blood. This review aims to systematically present the structure of the HSC "niche" and elucidate the mechanisms of their mobilization. However, this field is constantly evolving and new pathways and molecules have been shown to contribute to the mobilization process. Understanding the importance and the possible primary pathophysiologic role of each pathway is rather difficult, since they share various overlapping components. The primary initiating event for the mobilization of HSC is chemotherapy-induced endogenous G-CSF production or exogenous G-CSF administration. G-CSF induces proliferation and expansion of the myelomonocytic series, which leads to proteolytic enzyme activation. These enzymes result in disruption of various receptor-ligand bonds, which leads to the disanchorage of HSC from the bone marrow stroma. In everyday clinical practice, CXC chemokine receptor-4 (CXCR4) antagonists are now being used as mobilization agents in order to improve HSC collection. Furthermore, based on the proposed mechanisms of HSC mobilization, novel mobilizing agents have been developed and are currently evaluated in preclinical and clinical studies.
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Affiliation(s)
- Maria K. Angelopoulou
- Department of Hematology and Bone Marrow Transplantation, Laikon General Hospital, National and Kapodistrian University of Athens, 17 AgiouThoma, Goudi, 11527 Athens, Greece
| | - Pantelis Tsirkinidis
- Department of Hematology, 401 Army Forces Hospital, 138 Mesogeion Avenue, 11525 Athens, Greece
| | - Georgios Boutsikas
- Department of Hematology and Bone Marrow Transplantation, Laikon General Hospital, National and Kapodistrian University of Athens, 17 AgiouThoma, Goudi, 11527 Athens, Greece
| | - Theodoros P. Vassilakopoulos
- Department of Hematology and Bone Marrow Transplantation, Laikon General Hospital, National and Kapodistrian University of Athens, 17 AgiouThoma, Goudi, 11527 Athens, Greece
| | - Panayiotis Tsirigotis
- 2nd Propedeutic Department of Internal Medicine, National and Kapodistrian University of Athens, 1 Rimini Street, Chaidari, 12462 Athens, Greece
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43
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Hawkins KE, Sharp TV, McKay TR. The role of hypoxia in stem cell potency and differentiation. Regen Med 2014; 8:771-82. [PMID: 24147532 DOI: 10.2217/rme.13.71] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Regenerative medicine relies on harnessing the capacity of stem cells to grow, divide and differentiate safely and predictably. This may be in the context of expanding stem cells in vitro or encouraging their expansion, mobilization and capacity to regenerate tissues either locally or remotely in vivo. In either case, understanding the stem cell niche is fundamental to recapitulating or manipulating conditions to enable therapy. It has become obvious that hypoxia plays a fundamental role in the maintenance of the stem cell niche. Low O2 benefits the self-renewal of human embryonic, hematopoietic, mesenchymal and neural stem cells, as well as improving the efficiency of genetic reprogramming to induced pluripotency. There is emerging evidence that harnessing or manipulating the hypoxic response can result in safer, more efficacious methodologies for regenerative medicine.
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Affiliation(s)
- Kate E Hawkins
- Division of Biomedical Sciences, St George's University of London, Cranmer Terrace, London, SW17 0RE, UK
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44
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Rovida E, Marzi I, Cipolleschi MG, Dello Sbarba P. One more stem cell niche: how the sensitivity of chronic myeloid leukemia cells to imatinib mesylate is modulated within a "hypoxic" environment. HYPOXIA 2014; 2:1-10. [PMID: 27774462 PMCID: PMC5045050 DOI: 10.2147/hp.s51812] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This is a review (by no means comprehensive) of how the stem cell niche evolved from an abstract concept to a complex system, implemented with a number of experimental data at the cellular and molecular levels, including metabolic cues, on which we focused in particular. The concept was introduced in 1978 to model bone marrow sites suited to host hematopoietic stem cells (HSCs) and favor their self-renewal, while restraining clonal expansion and commitment to differentiation. Studies of the effects of low oxygen tension on HSC maintenance in vitro led us to hypothesize niches were located within bone marrow areas where oxygen tension is lower than elsewhere. We named these areas hypoxic stem cell niches, although a low oxygen tension is to be considered physiological for the environment where HSCs are maintained. HSCs were later shown to have the option of cycling in low oxygen, which steers this cycling to the maintenance of stem cell potential. Cell subsets capable of withstanding incubation in very low oxygen were also detected within leukemia cell populations, including chronic myeloid leukemia (CML). The oncogenetic Bcr/Abl protein is completely suppressed in these subsets, whereas Bcr/Abl messenger ribonucleic acid is not, indicating that CML cells resistant to low oxygen are independent of Bcr/Abl for persistence in culture but remain genetically leukemic. Accordingly, leukemia stem cells of CML selected in low oxygen are refractory to the Bcr/Abl inhibitor imatinib mesylate. Bcr/Abl protein suppression turned out to be actually determined when glucose shortage complicated the effects of low oxygen, indicating that ischemia-like conditions are the driving force of leukemia stem cell refractoriness to imatinib mesylate. These studies pointed to “ischemic” stem cell niches as a novel scenario for the maintenance of minimal residual disease of CML. A possible functional relationship of the “ischemic” with the “hypoxic” stem cell niche is discussed.
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Affiliation(s)
- Elisabetta Rovida
- Dipartimento di Scienze Biomediche Sperimentali e Cliniche, Università degli Studi di Firenze, Florence, Italy; Istituto Toscano Tumori, Florence, Italy
| | - Ilaria Marzi
- Dipartimento di Scienze Biomediche Sperimentali e Cliniche, Università degli Studi di Firenze, Florence, Italy; Istituto Toscano Tumori, Florence, Italy
| | - Maria Grazia Cipolleschi
- Dipartimento di Scienze Biomediche Sperimentali e Cliniche, Università degli Studi di Firenze, Florence, Italy; Istituto Toscano Tumori, Florence, Italy
| | - Persio Dello Sbarba
- Dipartimento di Scienze Biomediche Sperimentali e Cliniche, Università degli Studi di Firenze, Florence, Italy; Istituto Toscano Tumori, Florence, Italy
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45
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Hopman RK, DiPersio JF. Advances in stem cell mobilization. Blood Rev 2014; 28:31-40. [PMID: 24476957 DOI: 10.1016/j.blre.2014.01.001] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2013] [Revised: 12/23/2013] [Accepted: 01/06/2014] [Indexed: 12/22/2022]
Abstract
Use of granulocyte colony stimulating factor (G-CSF)-mobilized peripheral blood hematopoietic progenitor cells (HPCs) has largely replaced bone marrow (BM) as a source of stem cells for both autologous and allogeneic cell transplantation. With G-CSF alone, up to 35% of patients are unable to mobilize sufficient numbers of CD34 cells/kg to ensure successful and consistent multi-lineage engraftment and sustained hematopoietic recovery. To this end, research is ongoing to identify new agents or combinations which will lead to the most effective and efficient stem cell mobilization strategies, especially in those patients who are at risk for mobilization failure. We describe both established agents and novel strategies at various stages of development. The latter include but are not limited to drugs that target the SDF-1/CXCR4 axis, S1P agonists, VCAM/VLA-4 inhibitors, parathyroid hormone, proteosome inhibitors, Groβ, and agents that stabilize HIF. While none of the novel agents have yet gained an established role in HPC mobilization in clinical practice, many early studies exploring these new pathways show promising results and warrant further investigation.
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Affiliation(s)
- Rusudan K Hopman
- Division of Oncology, Washington University School of Medicine, USA
| | - John F DiPersio
- Division of Oncology, Washington University School of Medicine, USA; Siteman Cancer Center, Washington University School of Medicine, USA.
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46
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Calvi LM, Link DC. Cellular complexity of the bone marrow hematopoietic stem cell niche. Calcif Tissue Int 2014; 94:112-24. [PMID: 24101231 PMCID: PMC3936515 DOI: 10.1007/s00223-013-9805-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 09/15/2013] [Indexed: 12/17/2022]
Abstract
The skeleton serves as the principal site for hematopoiesis in adult terrestrial vertebrates. The function of the hematopoietic system is to maintain homeostatic levels of all circulating blood cells, including myeloid cells, lymphoid cells, red blood cells, and platelets. This action requires the daily production of more than 500 billion blood cells. The vast majority of these cells are synthesized in the bone marrow, where they arise from a limited number of hematopoietic stem cells (HSCs) that are multipotent and capable of extensive self-renewal. These attributes of HSCs are best demonstrated by marrow transplantation, where even a single HSC can repopulate the entire hematopoietic system. HSCs are therefore adult stem cells capable of multilineage repopulation, poised between cell fate choices which include quiescence, self-renewal, differentiation, and apoptosis. While HSC fate choices are in part determined by multiple stochastic fluctuations of cell autonomous processes, according to the niche hypothesis, signals from the microenvironment are also likely to determine stem cell fate. While it had long been postulated that signals within the bone marrow could provide regulation of hematopoietic cells, it is only in the past decade that advances in flow cytometry and genetic models have allowed for a deeper understanding of the microenvironmental regulation of HSCs. In this review, we will highlight the cellular regulatory components of the HSC niche.
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Affiliation(s)
- Laura M Calvi
- Division of Endocrinology and Metabolism, Department of Medicine, School of Medicine and Dentistry, University of Rochester, Rochester, NY, USA,
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47
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Forristal CE, Levesque JP. Targeting the hypoxia-sensing pathway in clinical hematology. Stem Cells Transl Med 2013; 3:135-40. [PMID: 24371328 DOI: 10.5966/sctm.2013-0134] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Hypoxia-inducible factors (HIFs) are oxygen-sensitive transcription factors regulated by oxygen-dependent prolyl hydroxylase domain (PHD) enzymes and are key to cell adaptation to low oxygen. The hematopoietic stem cell (HSC) niche in the bone marrow is highly heterogeneous in terms of microvasculature and thus oxygen concentration. The importance of hypoxia and HIFs in the hematopoietic environment is becoming increasingly recognized. Many small compounds that inhibit PHDs have been developed, enabling HIFs to be pharmacologically stabilized in an oxygen-independent manner. The use of PHD inhibitors for therapeutic intervention in hematopoiesis is being increasingly investigated. PHD inhibitors are well established to increase erythropoietin production to correct anemia in hemodialysis patients. Pharmacological stabilization of HIF-1α protein with PHD inhibitors is also emerging as an important regulator of HSC proliferation and self-renewal. Administration of PHD inhibitors increases quiescence and decreases proliferation of HSCs in the bone marrow in vivo, thereby protecting them from high doses of irradiation and accelerating hematological recovery. Recent findings also show that stabilization of HIF-1α increases mobilization of HSCs in response to granulocyte colony-stimulating factor and plerixafor, suggesting that PHD inhibitors could be useful agents to increase mobilization success in patients requiring transplantation. These findings highlight the importance of the hypoxia-sensing pathway and HIFs in clinical hematology.
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Affiliation(s)
- Catherine E Forristal
- Stem Cell Biology Group, Mater Research Institute-University of Queensland, Woolloongabba, Queensland, Australia
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48
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Anthony BA, Link DC. Regulation of hematopoietic stem cells by bone marrow stromal cells. Trends Immunol 2013; 35:32-7. [PMID: 24210164 DOI: 10.1016/j.it.2013.10.002] [Citation(s) in RCA: 200] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Revised: 09/25/2013] [Accepted: 10/05/2013] [Indexed: 01/09/2023]
Abstract
Hematopoietic stem cells (HSCs) reside in specialized microenvironments (niches) in the bone marrow. The stem cell niche is thought to provide signals that support key HSC properties, including self-renewal capacity and long-term multilineage repopulation ability. The stromal cells that comprise the stem cell niche and the signals that they generate that support HSC function are the subjects of intense investigation. Here, we review the complex and diverse stromal cell populations that reside in the bone marrow and examine their contribution to HSC maintenance. We highlight recent data suggesting that perivascular chemokine CXC ligand (CXCL)12-expressing mesenchymal progenitors and endothelial cells are key cellular components of the stem cell niche in the bone marrow.
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Affiliation(s)
- Bryan A Anthony
- Department of Medicine, Siteman Cancer Center, Washington University School of Medicine, St. Louis, MO, USA
| | - Daniel C Link
- Department of Medicine, Siteman Cancer Center, Washington University School of Medicine, St. Louis, MO, USA.
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49
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Rouault-Pierre K, Lopez-Onieva L, Foster K, Anjos-Afonso F, Lamrissi-Garcia I, Serrano-Sanchez M, Mitter R, Ivanovic Z, de Verneuil H, Gribben J, Taussig D, Rezvani HR, Mazurier F, Bonnet D. HIF-2α protects human hematopoietic stem/progenitors and acute myeloid leukemic cells from apoptosis induced by endoplasmic reticulum stress. Cell Stem Cell 2013; 13:549-63. [PMID: 24095676 DOI: 10.1016/j.stem.2013.08.011] [Citation(s) in RCA: 142] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Revised: 07/09/2013] [Accepted: 08/22/2013] [Indexed: 01/16/2023]
Abstract
Hematopoietic stem and progenitor cells (HSPCs) are exposed to low levels of oxygen in the bone marrow niche, and hypoxia-inducible factors (HIFs) are the main regulators of cellular responses to oxygen variation. Recent studies using conditional knockout mouse models have unveiled a major role for HIF-1α in the maintenance of murine HSCs; however, the role of HIF-2α is still unclear. Here, we show that knockdown of HIF-2α, and to a much lesser extent HIF-1α, impedes the long-term repopulating ability of human CD34(+) umbilical cord blood cells. HIF-2α-deficient HSPCs display increased production of reactive oxygen species (ROS), which subsequently stimulates endoplasmic reticulum (ER) stress and triggers apoptosis by activation of the unfolded-protein-response (UPR) pathway. HIF-2α deregulation also significantly decreased engraftment ability of human acute myeloid leukemia (AML) cells. Overall, our data demonstrate a key role for HIF-2α in the maintenance of human HSPCs and in the survival of primary AML cells.
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Affiliation(s)
- Kevin Rouault-Pierre
- Haematopoietic Stem Cell Laboratory, London Research Institute, Cancer Research UK, WC2A 3LY, London, UK; INSERM U 1035, Bordeaux, F-33076 France; Université Bordeaux Segalen, Bordeaux, F-33076 France
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50
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Dynamic Cross Talk between S1P and CXCL12 Regulates Hematopoietic Stem Cells Migration, Development and Bone Remodeling. Pharmaceuticals (Basel) 2013; 6:1145-69. [PMID: 24276423 PMCID: PMC3818832 DOI: 10.3390/ph6091145] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Revised: 08/18/2013] [Accepted: 09/04/2013] [Indexed: 12/23/2022] Open
Abstract
Hematopoietic stem cells (HSCs) are mostly retained in a quiescent non-motile mode in their bone marrow (BM) niches, shifting to a migratory cycling and differentiating state to replenish the blood with mature leukocytes on demand. The balance between the major chemo-attractants CXCL12, predominantly in the BM, and S1P, mainly in the blood, dynamically regulates HSC recruitment to the circulation versus their retention in the BM. During alarm situations, stress-signals induce a decrease in CXCL12 levels in the BM, while S1P levels are rapidly and transiently increased in the circulation, thus favoring mobilization of stem cells as part of host defense and repair mechanisms. Myeloid cytokines, including G-CSF, up-regulate S1P signaling in the BM via the PI3K pathway. Induced CXCL12 secretion from stromal cells via reactive oxygen species (ROS) generation and increased S1P1 expression and ROS signaling in HSCs, all facilitate mobilization. Bone turnover is also modulated by both CXCL12 and S1P, regulating the dynamic BM stromal microenvironment, osteoclasts and stem cell niches which all functionally express CXCL12 and S1P receptors. Overall, CXCL12 and S1P levels in the BM and circulation are synchronized to mutually control HSC motility, leukocyte production and osteoclast/osteoblast bone turnover during homeostasis and stress situations.
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