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Hofmann J, Kokkaliaris KD. Bone marrow niches for hematopoietic stem cells: life span dynamics and adaptation to acute stress. Blood 2024; 144:21-34. [PMID: 38579285 DOI: 10.1182/blood.2023023788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 03/28/2024] [Accepted: 03/28/2024] [Indexed: 04/07/2024] Open
Abstract
ABSTRACT Hematopoietic stem cells (HSCs) are instrumental for organismal survival because they are responsible for lifelong production of mature blood lineages in homeostasis and response to external stress. To fulfill their function, HSCs rely on reciprocal interactions with specialized tissue microenvironments, termed HSC niches. From embryonic development to advanced aging, HSCs transition through several hematopoietic organs in which they are supported by distinct extrinsic cues. Here, we describe recent discoveries on how HSC niches collectively adapt to ensure robust hematopoietic function during biological aging and after exposure to acute stress. We also discuss the latest strategies leveraging niche-derived signals to revert aging-associated phenotypes and enhance hematopoietic recovery after myeloablation.
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Affiliation(s)
- Johanna Hofmann
- Dr. Senckenberg Institute of Pathology, University Hospital Frankfurt, Frankfurt am Main, Germany
- Department 15, Biosciences, Goethe University Frankfurt am Main, Frankfurt am Main, Germany
| | - Konstantinos D Kokkaliaris
- Dr. Senckenberg Institute of Pathology, University Hospital Frankfurt, Frankfurt am Main, Germany
- German Cancer Consortium (DKTK), Partner Site Frankfurt/Mainz, Quantitative Spatial Cancer Biology Laboratory, and German Cancer Research Center (DKFZ), Heidelberg, Germany
- Frankfurt Cancer Institute, Goethe University Frankfurt, Frankfurt am Main, Germany
- University Cancer Center, Frankfurt am Main, Germany
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2
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Kodali N, Kumar KD, Schwartz RA. The role of scoliosis on the comorbidity and demographics of neurofibromatosis type 1 patients: A retrospective analysis of the National Inpatient Sample database. Exp Dermatol 2024; 33:e14996. [PMID: 38284196 DOI: 10.1111/exd.14996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 12/04/2023] [Accepted: 12/07/2023] [Indexed: 01/30/2024]
Abstract
Neurofibromatosis type 1 (NF1) is the most common neurocutaneous syndrome in the United States, affecting every 1 in 3000 individuals. NF1 occurs due to non-functional mutations in the NF1 gene, which expresses neurofibromin, a protein involved in tumour suppression. As a result, NF1 typically presents with non-cancerous neoplasm masses called neurofibromas across the body. Out of all NF1 abnormalities, the most common skeletal abnormality seen in around 10%-30% of NF1 patients is scoliosis, an improver curvature of the spine. However, there is a lack of research on the effects of scoliosis on demographics and morbidities of NF1 patients. We performed a national analysis to investigate the complex relationship between NF1 and scoliosis on patients' demographics and comorbidities. We conducted a retrospective cross-sectional analysis of the 2017 US National Inpatient Sample database using univariable Chi-square analysis and multivariable binary logistic regression analysis to determine the interplay of NF1 and scoliosis on patients' demographics and comorbidities. Our query resulted in 4635 total NF1 patients, of which 475 (10.25%) had scoliosis and 4160 (89.75%) did not. Demographic analysis showed that NF1 patients with scoliosis were typically younger, female and white compared to NF1 patients without scoliosis. Comorbidity analysis showed that NF1 patients with scoliosis were more likely to develop malignant brain neoplasms, epilepsy, hydrocephalus, pigmentation disorders, hypothyroidism, diabetes with chronic complications and coagulopathy disorders. NF1 patients with scoliosis were less likely to develop congestive heart failure, pulmonary circulation disease, peripheral vascular disease, paralysis, chronic pulmonary disease, lymphoma and psychosis. NF1 patients with scoliosis were predominantly younger, female, white patients. The presence of scoliosis in NF1 patients increases the risks for certain brain neoplasms and disorders but serves a protective effect against some pulmonary and cardiac complications.
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Affiliation(s)
- Nilesh Kodali
- Department of Dermatology, Rutgers New Jersey Medical School, Newark, New Jersey, USA
| | - Keshav D Kumar
- Department of Dermatology, Rutgers New Jersey Medical School, Newark, New Jersey, USA
| | - Robert A Schwartz
- Department of Dermatology, Rutgers New Jersey Medical School, Newark, New Jersey, USA
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3
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Single-cell RNA-seq profiling of individual Biomphalaria glabrata immune cells with a focus on immunologically relevant transcripts. Immunogenetics 2021; 74:77-98. [PMID: 34854945 DOI: 10.1007/s00251-021-01236-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Accepted: 11/17/2021] [Indexed: 12/20/2022]
Abstract
The immune cells of the snail Biomphalaria glabrata are classified into hyalinocyte and granulocyte subtypes. Both subtypes are essential for the proper functioning of the snail immune response, which we understand best within the context of how it responds to challenge with the human parasite Schistosoma mansoni. Granulocytes are adherent phagocytic cells that possess conspicuous granules within the cell cytoplasm. Hyalinocytes, on the other hand, are predominantly non-adherent and are known to produce a handful of anti-S. mansoni immune effectors. While our understanding of these cells has progressed, an in-depth comparison of the functional capabilities of each type of immune cell has yet to be undertaken. Here, we present the results of a single-cell RNA-seq study in which single granulocytes and hyalinocytes from S. mansoni-susceptible M-line B. glabrata and S. mansoni-resistant BS-90 B. glabrata are compared without immune stimulation. This transcriptomic analysis supports a role for the hyalinocytes as producers of immune effectors such as biomphalysin and thioester-containing proteins. It suggests that granulocytes are primarily responsible for producing fibrinogen-related proteins and are armed with various pattern-recognition receptors such as toll-like receptors with a confirmed role in the anti-S. mansoni immune response. This analysis also confirms that the granulocytes and hyalinocytes of BS-90 snails are generally more immunologically prepared than their M-line counterparts. As the first single-cell analysis of the transcriptional profiles of B. glabrata immune cells, this study provides crucial context for understanding the B. glabrata immune response. It sets the stage for future investigations into how each immune cell subtype differs in its response to various immunological threats.
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4
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Budgude P, Kale V, Vaidya A. Pharmacological Inhibition of p38 MAPK Rejuvenates Bone Marrow Derived-Mesenchymal Stromal Cells and Boosts their Hematopoietic Stem Cell-Supportive Ability. Stem Cell Rev Rep 2021; 17:2210-2222. [PMID: 34420158 DOI: 10.1007/s12015-021-10240-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2021] [Indexed: 01/12/2023]
Abstract
The therapeutic value of mesenchymal stromal cells (MSCs) for various regenerative medicine applications, including hematopoietic stem cell transplantations (HSCT), has been well-established. Owing to their small numbers in vivo, it becomes necessary to expand them in vitro, which leads to a gradual loss of their regenerative capacity. Stress-induced mitogen-activated protein kinase p38 (p38 MAPK) signaling has been shown to compromise the MSC functions. Therefore, we investigated whether pharmacological inhibition of p38 MAPK signaling rejuvenates the cultured MSCs and boosts their functionality. Indeed, we found that the ex vivo expanded MSCs show activated p38 MAPK signaling and exhibit increased oxidative stress. These MSCs show a decreased ability to secrete salutary niche factors, thereby compromising their ability to support hematopoietic stem cell (HSC) self-renewal, proliferation, and differentiation. We, therefore, attempted to rejuvenate the cultured MSCs by pharmacological inhibition of p38 MAPK - a strategy broadly known as "priming of MSCs". We demonstrate that priming of MSCs with a p-38 MAPK inhibitor, PD169316, boosts their niche-supportive functions via upregulation of various HSC-supportive transcription factors. These primed MSCs expand multipotent HSCs having superior homing and long-term reconstitution ability. These findings shed light on the significance of non-cell-autonomous mechanisms operative in the hematopoietic niche and point towards the possible use of pharmacological compounds for rejuvenation of ex vivo cultured MSCs. Such approaches could improve the outcome of regenerative therapies involving in vitro cultured MSCs.
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Affiliation(s)
- Pallavi Budgude
- Symbiosis Centre for Stem Cell Research, Symbiosis International (Deemed University), Gram: Lavale, Taluka: Mulshi, Pune, 412115, India.,Symbiosis School of Biological Sciences, Symbiosis International (Deemed University), Gram: Lavale, Taluka: Mulshi, Pune, 412115, India
| | - Vaijayanti Kale
- Symbiosis Centre for Stem Cell Research, Symbiosis International (Deemed University), Gram: Lavale, Taluka: Mulshi, Pune, 412115, India
| | - Anuradha Vaidya
- Symbiosis Centre for Stem Cell Research, Symbiosis International (Deemed University), Gram: Lavale, Taluka: Mulshi, Pune, 412115, India. .,Symbiosis School of Biological Sciences, Symbiosis International (Deemed University), Gram: Lavale, Taluka: Mulshi, Pune, 412115, India.
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5
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Kam AYF, Piryani SO, Lee CL, Rizzieri DA, Spector NL, Sarantopoulos S, Doan PL. Selective ERBB2 and BCL2 Inhibition Is Synergistic for Mitochondrial-Mediated Apoptosis in MDS and AML Cells. Mol Cancer Res 2021; 19:886-899. [PMID: 33514658 DOI: 10.1158/1541-7786.mcr-20-0973] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 12/23/2020] [Accepted: 01/21/2021] [Indexed: 11/16/2022]
Abstract
The ERBB2 proto-oncogene is associated with an aggressive phenotype in breast cancer. Its role in hematologic malignancies is incompletely defined, in part because ERBB2 is not readily detected on the surface of cancer cells. We demonstrate that truncated ERBB2, which lacks the extracellular domain, is overexpressed on primary CD34+ myelodysplastic syndrome (MDS) and acute myeloid leukemia (AML) cells compared with healthy hematopoietic cells. This overexpression of ERBB2 is associated with aberrant, oncogenic signaling with autophosphorylation of multiple tyrosine sites. Like in breast cancers, ERBB2 can exist as truncated isoforms p95ERBB2 and p110ERBB2 in MDS and AML. Neutralization of ERBB2 signaling with ERBB2 tyrosine kinase inhibitors (i.e., lapatinib, afatinib, and neratinib) increases apoptotic cell death and reduces human engraftment of MDS cells in mice at 21 weeks posttransplantation. Inhibition of ERBB2 modulates the expression of multiple pro- and anti-apoptotic mitochondrial proteins, including B-cell lymphoma 2 (BCL2). Dual blockade with ERBB2 and BCL2 inhibitors triggers additional reductions of BCL2 phosphorylation and myeloid cell leukemia-1 (MCL1) expression compared with single drug treatment. Dual therapy was synergistic at all tested doses, with a dose reduction index of up to 29 for lapatinib + venetoclax compared with venetoclax alone. Notably, these agents operated together and shifted cancer cells to a pro-apoptotic phenotype, resulting in increased mitochondrial cytochrome c release and activated caspase-3-mediated cell death. IMPLICATIONS: These findings warrant study of ERBB2 and BCL2 combination therapy in patients with MDS and AML. VISUAL OVERVIEW: http://mcr.aacrjournals.org/content/molcanres/19/5/886/F1.large.jpg.
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Affiliation(s)
- Angel Y F Kam
- Division of Hematologic Malignancies and Cellular Therapy, Department of Medicine, Duke University, Durham, North Carolina
| | - Sadhna O Piryani
- Division of Hematologic Malignancies and Cellular Therapy, Department of Medicine, Duke University, Durham, North Carolina
| | - Chang-Lung Lee
- Department of Radiation Oncology, Duke University Medical Center, Durham, North Carolina.,Department of Pathology, Duke University Medical Center, Durham, North Carolina.,Duke Cancer Institute, Duke University, Durham, North Carolina
| | - David A Rizzieri
- Division of Hematologic Malignancies and Cellular Therapy, Department of Medicine, Duke University, Durham, North Carolina.,Duke Cancer Institute, Duke University, Durham, North Carolina
| | - Neil L Spector
- Duke Cancer Institute, Duke University, Durham, North Carolina.,Division of Medical Oncology, Department of Medicine, Duke University, Durham, North Carolina
| | - Stefanie Sarantopoulos
- Division of Hematologic Malignancies and Cellular Therapy, Department of Medicine, Duke University, Durham, North Carolina.,Duke Cancer Institute, Duke University, Durham, North Carolina
| | - Phuong L Doan
- Division of Hematologic Malignancies and Cellular Therapy, Department of Medicine, Duke University, Durham, North Carolina. .,Duke Cancer Institute, Duke University, Durham, North Carolina
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6
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Chen J, Dong Y, Peng J, Zhang J, Gao X, Lu A, Shen C. Notch signaling mitigates chemotherapy toxicity by accelerating hematopoietic stem cells proliferation via c-Myc. Am J Transl Res 2020; 12:6723-6739. [PMID: 33194068 PMCID: PMC7653623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Accepted: 09/22/2020] [Indexed: 06/11/2023]
Abstract
The mechanisms that regulate hematopoietic stem cell (HSC) regeneration after myelosuppressive injury are not well understood. Here, we showed that disruption of Notch signaling aggravated chemotherapy-induced myelosuppression in inducible genetic mice. Conversely, Notch activation correlated positively with clinical HSC engraftment. We used endothelial-targeted chimeric Notch ligand Delta-like 1 (D1R) to activate Notch signaling in hematopoietic stem/progenitor cells through micro-environmental cellular contact. Recombinant protein D1R contributed to the recovery of the HSC pool and sustained HSC vitality in response to various chemotherapeutic agents in vivo. Mechanistically, D1R treatment promoted HSC proliferation transiently, prevented HSC exhaustion, correlated with activation of the downstream phosphoinositide 3-kinase (PI3K)/extracellular-signal-regulated kinase (ERK)/BCL2 associated agonist of cell death (BAD) signaling axis during regeneration, and partially mediated upregulation of c-Myc in HSCs. These data reveal an unrecognized role for Notch signaling in promoting HSC repopulation after myelosuppressive chemotherapy and offer a new therapeutic approach to mitigate chemotherapy-induced injury.
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Affiliation(s)
- Juanjuan Chen
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Department of Infectious Diseases, Nanfang Hospital, Southern Medical UniversityGuangzhou, China
- Department of Oncology and Hematology, 421 Hospital of Chinese People’s Liberation ArmyGuangzhou, China
| | - Yan Dong
- Department of Hematology, Tangdu Hospital, Fourth Military Medical UniversityXi’an, China
| | - Jie Peng
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Department of Infectious Diseases, Nanfang Hospital, Southern Medical UniversityGuangzhou, China
| | - Jian Zhang
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Department of Infectious Diseases, Nanfang Hospital, Southern Medical UniversityGuangzhou, China
| | - Xiaotong Gao
- Department of Hematology, Tangdu Hospital, Fourth Military Medical UniversityXi’an, China
| | - Aili Lu
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Department of Infectious Diseases, Nanfang Hospital, Southern Medical UniversityGuangzhou, China
| | - Chunlin Shen
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Department of Infectious Diseases, Nanfang Hospital, Southern Medical UniversityGuangzhou, China
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7
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Grases-Pintó B, Torres-Castro P, Marín-Morote L, Abril-Gil M, Castell M, Rodríguez-Lagunas MJ, Pérez-Cano FJ, Franch À. Leptin and EGF Supplementation Enhance the Immune System Maturation in Preterm Suckling Rats. Nutrients 2019; 11:nu11102380. [PMID: 31590415 PMCID: PMC6836246 DOI: 10.3390/nu11102380] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 09/10/2019] [Accepted: 09/15/2019] [Indexed: 12/15/2022] Open
Abstract
In preterm newborns the immaturity of the immune system is remarkable, with reduced innate and adaptive immune responses. Many bioactive compounds in breast milk, such as growth factors and adipokines, contribute to the immune system’s maturation in early life. However, studies on the immunoregulatory activity in preterm neonates are practically nonexistent. The aim of the present study was to determine whether a nutritional supplementation in early life with leptin or epidermal growth factor (EGF) was able to promote the maturation of the systemic and intestinal immune system in preterm conditions. For this purpose, premature rats were daily supplemented by oral gavage with leptin or EGF. Term and Preterm groups receiving vehicle were used as controls. Preterm rats showed deficiencies compared to full-term ones, such as lower body weights, erythrocyte counts, plasma IgG and IgM concentrations and B cell percentages, and higher values of Th and Tc TCRαβ+ cells in mesenteric lymph nodes, and intestinal permeability, among others. However, leptin and EGF supplementation were able to revert some of these deficiencies and to improve the premature immune system’s development. These results suggest that leptin and EGF are involved in enhancing the maturation of the systemic and intestinal immune system in preterm conditions.
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Affiliation(s)
- Blanca Grases-Pintó
- Physiology Section, Department of Biochemistry and Physiology, Faculty of Pharmacy and Food Science, University of Barcelona, 08028 Barcelona, Spain.
- Nutrition and Food Safety Research Institute (INSA·UB), 08921 Santa Coloma de Gramenet, Spain.
| | - Paulina Torres-Castro
- Physiology Section, Department of Biochemistry and Physiology, Faculty of Pharmacy and Food Science, University of Barcelona, 08028 Barcelona, Spain.
- Nutrition and Food Safety Research Institute (INSA·UB), 08921 Santa Coloma de Gramenet, Spain.
| | - Lidia Marín-Morote
- Physiology Section, Department of Biochemistry and Physiology, Faculty of Pharmacy and Food Science, University of Barcelona, 08028 Barcelona, Spain.
- Nutrition and Food Safety Research Institute (INSA·UB), 08921 Santa Coloma de Gramenet, Spain.
| | - Mar Abril-Gil
- Physiology Section, Department of Biochemistry and Physiology, Faculty of Pharmacy and Food Science, University of Barcelona, 08028 Barcelona, Spain.
- Nutrition and Food Safety Research Institute (INSA·UB), 08921 Santa Coloma de Gramenet, Spain.
| | - Margarida Castell
- Physiology Section, Department of Biochemistry and Physiology, Faculty of Pharmacy and Food Science, University of Barcelona, 08028 Barcelona, Spain.
- Nutrition and Food Safety Research Institute (INSA·UB), 08921 Santa Coloma de Gramenet, Spain.
| | - María J Rodríguez-Lagunas
- Physiology Section, Department of Biochemistry and Physiology, Faculty of Pharmacy and Food Science, University of Barcelona, 08028 Barcelona, Spain.
- Nutrition and Food Safety Research Institute (INSA·UB), 08921 Santa Coloma de Gramenet, Spain.
| | - Francisco J Pérez-Cano
- Physiology Section, Department of Biochemistry and Physiology, Faculty of Pharmacy and Food Science, University of Barcelona, 08028 Barcelona, Spain.
- Nutrition and Food Safety Research Institute (INSA·UB), 08921 Santa Coloma de Gramenet, Spain.
| | - Àngels Franch
- Physiology Section, Department of Biochemistry and Physiology, Faculty of Pharmacy and Food Science, University of Barcelona, 08028 Barcelona, Spain.
- Nutrition and Food Safety Research Institute (INSA·UB), 08921 Santa Coloma de Gramenet, Spain.
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8
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Piryani SO, Kam AYF, Vu UT, Chao NJ, Doan PL. CCR5 Signaling Promotes Murine and Human Hematopoietic Regeneration following Ionizing Radiation. Stem Cell Reports 2019; 13:76-90. [PMID: 31155503 PMCID: PMC6626871 DOI: 10.1016/j.stemcr.2019.04.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 04/25/2019] [Accepted: 04/30/2019] [Indexed: 01/05/2023] Open
Abstract
Hematopoietic stem and progenitor cells (HSPCs) depend on regulatory cytokines from the marrow microenvironment. From an unbiased cytokine screen of murine marrow supernatants, we identified C-C motif chemokine ligand 5 (CCL5) as an endothelial cell-secreted hematopoietic growth factor. Following treatment with CCL5, hematopoietic regeneration is accelerated and survival is prolonged after radiation. In mice with deletion of Ccr5, hematopoietic regeneration is delayed compared to control mice. Deletion of Ccr5 specifically in hematopoietic cells was sufficient to delay regeneration, while the deletion of Ccr5 in stromal/endothelial cells was not. Mechanistically, CCL5 promotes hematopoietic cell cycling and cell survival. Like murine hematopoietic cells, human hematopoietic cells (cord blood, healthy marrow, and peripheral blood) increase CCR5 expression after radiation exposure to promote cell survival. These data establish that CCL5 and CCR5 signaling play critical roles in hematopoietic regeneration and could serve as therapeutic targets to shorten the duration of myelosuppression. CCL5 and CCR5 expression in the bone marrow is increased following radiation CCL5 promotes cell cycling and survival after irradiation CCR5 is necessary for hematopoietic regeneration CCL5 can shorten the duration of myelosuppression following total body radiation
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Affiliation(s)
- Sadhna O Piryani
- Division of Hematologic Malignancies and Cellular Therapy, Duke University, Durham, NC 27710, USA
| | - Angel Y F Kam
- Division of Hematologic Malignancies and Cellular Therapy, Duke University, Durham, NC 27710, USA
| | - Uyen T Vu
- Division of Hematologic Malignancies and Cellular Therapy, Duke University, Durham, NC 27710, USA
| | - Nelson J Chao
- Division of Hematologic Malignancies and Cellular Therapy, Duke University, Durham, NC 27710, USA; Duke Cancer Institute, Duke University, 595 LaSalle Street, DUMC 103866, Durham, NC 27710, USA
| | - Phuong L Doan
- Division of Hematologic Malignancies and Cellular Therapy, Duke University, Durham, NC 27710, USA; Duke Cancer Institute, Duke University, 595 LaSalle Street, DUMC 103866, Durham, NC 27710, USA.
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9
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Piryani SO, Jiao Y, Kam AYF, Liu Y, Vo-Dinh T, Chen BJ, Chao NJ, Doan PL. Endothelial Cell-Derived Extracellular Vesicles Mitigate Radiation-Induced Hematopoietic Injury. Int J Radiat Oncol Biol Phys 2019; 104:291-301. [PMID: 30763662 DOI: 10.1016/j.ijrobp.2019.02.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 11/29/2018] [Accepted: 02/04/2019] [Indexed: 12/31/2022]
Abstract
PURPOSE Extracellular vesicles (EVs) are shed vesicles that bear a combination of nucleic acids and proteins. EVs are becoming recognized as a mode of cell-to-cell communication. Because hematopoietic stem cells reside in proximity to endothelial cells (ECs), we investigated whether EC-derived EVs could regulate hematopoietic stem cell regeneration after ionizing radiation. METHODS AND MATERIALS We generated EVs derived from primary murine marrow ECs. We sought to determine the response of irradiated hematopoietic stem and progenitor cells to syngeneic or allogeneic EVs in culture assays. Starting 24 hours after either sublethal or lethal irradiation, mice were treated with EVs or saline or cultured primary marrow endothelial cells to determine the hematopoietic response in vivo. RESULTS We demonstrate that EVs bear nuclear material and express EC-specific markers. Treatment with EVs promoted cell expansion and increased the number of colony-forming units compared to irradiated, hematopoietic cell cultures treated with cytokines alone. After total body irradiation, EV-treated mice displayed preserved marrow cellularity, marrow vessel integrity, and prolonged overall survival compared with controls treated with saline. Treatment of irradiated hematopoietic stem/progenitor cells (HSPCs) with EVs from different genetic strains showed results similar to treatment of HSPCs from syngeneic EVs. Mechanistically, treatment of irradiated HSPCs with EVs resulted in decreased levels of annexin V+ apoptotic cell death, which is mediated in part by tissue inhibitor of metalloproteinase-1. CONCLUSIONS Our findings show that syngeneic or allogeneic EVs could serve as cell-derived therapy to deliver physiologic doses of nucleic acids and growth factors to hematopoietic cells to accelerate hematopoietic regeneration.
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Affiliation(s)
- Sadhna O Piryani
- Division of Hematologic Malignancies and Cellular Therapy, Duke University, Durham, North Carolina
| | - Yiqun Jiao
- Division of Hematologic Malignancies and Cellular Therapy, Duke University, Durham, North Carolina
| | - Angel Y F Kam
- Division of Hematologic Malignancies and Cellular Therapy, Duke University, Durham, North Carolina
| | - Yang Liu
- Department of Biomedical Engineering, Duke University, Durham, North Carolina; Department of Biomedical Engineering Chemistry, Duke University, Durham, North Carolina
| | - Tuan Vo-Dinh
- Department of Biomedical Engineering, Duke University, Durham, North Carolina; Department of Biomedical Engineering Chemistry, Duke University, Durham, North Carolina
| | - Benny J Chen
- Division of Hematologic Malignancies and Cellular Therapy, Duke University, Durham, North Carolina; Duke Cancer Institute, Duke University, Durham, North Carolina
| | - Nelson J Chao
- Division of Hematologic Malignancies and Cellular Therapy, Duke University, Durham, North Carolina; Duke Cancer Institute, Duke University, Durham, North Carolina
| | - Phuong L Doan
- Division of Hematologic Malignancies and Cellular Therapy, Duke University, Durham, North Carolina; Duke Cancer Institute, Duke University, Durham, North Carolina.
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10
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DiCarlo AL, Cassatt DR, Dowling WE, Esker JL, Hewitt JA, Selivanova O, Williams MS, Price PW. Challenges and Benefits of Repurposing Products for Use during a Radiation Public Health Emergency: Lessons Learned from Biological Threats and other Disease Treatments. Radiat Res 2018; 190:659-676. [PMID: 30160600 DOI: 10.1667/rr15137.1] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The risk of a radiological or nuclear public health emergency is a major growing concern of the U.S. government. To address a potential incident and ensure that the government is prepared to respond to any subsequent civilian or military casualties, the U.S. Department of Health and Human Services and the Department of Defense have been charged with the development of medical countermeasures (MCMs) to treat the acute and delayed injuries that can result from radiation exposure. Because of the limited budgets in research and development and the high costs associated with bring promising approaches from the bench through advanced product development activities, and ultimately, to regulatory approval, the U.S. government places a priority on repurposing products for which there already exists relevant safety and other important information concerning their use in humans. Generating human data can be a costly and time-consuming process; therefore, the U.S. government has interest in drugs for which such relevant information has been established (e.g., products for another indication), and in determining if they could be repurposed for use as MCMs to treat radiation injuries as well as chemical and biological insults. To explore these possibilities, the National Institute of Allergy and Infectious Diseases (NIAID) convened a workshop including U.S. government, industry and academic subject matter experts, to discuss the challenges and benefits of repurposing products for a radiation indication. Topics covered included a discussion of U.S. government efforts (e.g. funding, stockpiling and making products available for study), as well unique regulatory and other challenges faced when repurposing patent protected or generic drugs. Other discussions involved lessons learned from industry on repurposing pre-license, pipeline products within drug development portfolios. This report reviews the information presented, as well as an overview of discussions from the meeting.
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Affiliation(s)
- Andrea L DiCarlo
- a Radiation and Nuclear Countermeasures Program (RNCP), Division of Allergy, Immunology and Transplantation (DAIT), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Rockville, Maryland
| | - David R Cassatt
- a Radiation and Nuclear Countermeasures Program (RNCP), Division of Allergy, Immunology and Transplantation (DAIT), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Rockville, Maryland
| | - William E Dowling
- b Office of Biodefense Research Resources and Translational Research (OBRRTR), Division of Microbiology and Infectious Diseases (DMID), NIAID, NIH, Rockville, Maryland
| | - John L Esker
- c Biomedical Advanced Research and Development Authority (BARDA), Office of the Assistant Secretary for Preparedness and Response (ASPR), Department of Health and Human Services (HHS), Washington, DC
| | - Judith A Hewitt
- b Office of Biodefense Research Resources and Translational Research (OBRRTR), Division of Microbiology and Infectious Diseases (DMID), NIAID, NIH, Rockville, Maryland
| | - Oxana Selivanova
- c Biomedical Advanced Research and Development Authority (BARDA), Office of the Assistant Secretary for Preparedness and Response (ASPR), Department of Health and Human Services (HHS), Washington, DC
| | - Mark S Williams
- b Office of Biodefense Research Resources and Translational Research (OBRRTR), Division of Microbiology and Infectious Diseases (DMID), NIAID, NIH, Rockville, Maryland
| | - Paul W Price
- d Office of Regulatory Affairs (ORA), DAIT, NIAID, NIH, Rockville, Maryland
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