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Bloodworth NC, Chen W, Ruggeri Barbaro NR, Ao M, Palubinsky AM, O'Niel RT, Phillips EJ, Moretti R, Davies SS, Mallal SA, Meiler J, Harrison DG. Abstract 019: T Cell Recognition Of Isolevuglandin-adducted Proteins In Hypertension Is Mhc Class 1-restricted. Hypertension 2022. [DOI: 10.1161/hyp.79.suppl_1.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Introduction:
Isolevuglandins (isoLGs) are peroxidized lipids that covalently bond lysine residues to modify self-antigens in hypertension. We hypothesized that isoLG-adduction restricts peptide presentation to specific class 1 major histocompatibility complexes (MHC) in mice and humans.
Methods and Results:
We developed 2 mouse strains expressing either his-tagged class 1 MHC-I H-2D
b
or H-2K
b
with truncated membrane binding domains. Shed MHC-I from cultured splenoctyes was adsorbed onto nickel-agarose beads and used to stimulate T cells. We found that CD8+ T cell proliferation is restricted to H-2D
b
and not H-2K
b
(Fig 1A) and occurs only if both T-cells and soluble H-2D
b
are from hypertensive (angiotensin II-treated) mice. Proliferation was blocked if donors received an isoLG-scavenger or by an isoLG specific antibody added during the proliferation assay (Fig 1B). Fluorescence resonance energy transfer (FRET) demonstrated that isoLG-adducts associate with MHC-1 H-2D
b
and not H-2K
b
. We transfected HLA-null K562 cells with 18 common human HLA subtypes, and induced isoLG formation with tert-butyl hydroperoxide. Using FRET we identified human HLAs that are high, intermediate and low presenters of isoLG adducts (Fig 1C). Unique modeling software identified candidate peptides and showed that structural characteristics of H-2D
b
cause lysines at positions 4-7 to project from the MHC groove and present isoLGs (Fig 1D-E).
Conclusion:
IsoLG adduct presentation is MHC-1 restricted. This may explain differences in the degree of inflammation and end-organ damage observed between populations with hypertension and provides a possible new approach to personalized care.
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Affiliation(s)
| | - Wei Chen
- Vanderbilt Univ Med Cntr, Nashville, TN
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2
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Bloodworth NC, Clark CR, West JD, Snider JC, Gaskill C, Shay S, Scott C, Bastarache J, Gladson S, Moore C, D'Amico R, Brittain EL, Tanjore H, Blackwell TS, Majka SM, Merryman WD. Bone Marrow-Derived Proangiogenic Cells Mediate Pulmonary Arteriole Stiffening via Serotonin 2B Receptor Dependent Mechanism. Circ Res 2019; 123:e51-e64. [PMID: 30566041 DOI: 10.1161/circresaha.118.313397] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
RATIONALE Pulmonary arterial hypertension is a deadly disease of the pulmonary vasculature for which no disease-modifying therapies exist. Small-vessel stiffening and remodeling are fundamental pathological features of pulmonary arterial hypertension that occur early and drive further endovascular cell dysfunction. Bone marrow (BM)-derived proangiogenic cells (PACs), a specialized heterogeneous subpopulation of myeloid lineage cells, are thought to play an important role in pathogenesis. OBJECTIVE To determine whether BM-derived PACs directly contributed to experimental pulmonary hypertension (PH) by promoting small-vessel stiffening through 5-HT2B (serotonin 2B receptor)-mediated signaling. METHODS AND RESULTS We performed BM transplants using transgenic donor animals expressing diphtheria toxin secondary to activation of an endothelial-specific tamoxifen-inducible Cre and induced experimental PH using hypoxia with SU5416 to enhance endovascular injury and ablated BM-derived PACs, after which we measured right ventricular systolic pressures in a closed-chest procedure. BM-derived PAC lineage tracing was accomplished by transplanting BM from transgenic donor animals with fluorescently labeled hematopoietic cells and treating mice with a 5-HT2B antagonist. BM-derived PAC ablation both prevented and reversed experimental PH with SU5416-enhanced endovascular injury, reducing the number of muscularized pulmonary arterioles and normalizing arteriole stiffness as measured by atomic force microscopy. Similarly, treatment with a pharmacological antagonist of 5-HT2B also prevented experimental PH, reducing the number and stiffness of muscularized pulmonary arterioles. PACs accelerated pulmonary microvascular endothelial cell injury response in vitro, and the presence of BM-derived PACs significantly correlated with stiffer pulmonary arterioles in pulmonary arterial hypertension patients and mice with experimental PH. RNA sequencing of BM-derived PACs showed that 5-HT2B antagonism significantly altered biologic pathways regulating cell proliferation, locomotion and migration, and cytokine production and response to cytokine stimulus. CONCLUSIONS Together, our findings illustrate that BM-derived PACs directly contribute to experimental PH with SU5416-enhanced endovascular injury by mediating small-vessel stiffening and remodeling in a 5-HT2B signaling-dependent manner.
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Affiliation(s)
- Nathaniel C Bloodworth
- From the Department of Biomedical Engineering (N.C.B., C.R.C., J.C.S., C.S., R.D., W.D.M.), Vanderbilt University Medical Center, Nashville, TN
| | - Cynthia R Clark
- From the Department of Biomedical Engineering (N.C.B., C.R.C., J.C.S., C.S., R.D., W.D.M.), Vanderbilt University Medical Center, Nashville, TN
| | - James D West
- Division of Allergy, Pulmonary, and Critical Care, Department of Medicine (J.D.W., C.G., S.S., J.B., S.G., C.M., H.T., T.S.B., S.M.M.), Vanderbilt University Medical Center, Nashville, TN
| | - J Caleb Snider
- From the Department of Biomedical Engineering (N.C.B., C.R.C., J.C.S., C.S., R.D., W.D.M.), Vanderbilt University Medical Center, Nashville, TN
| | - Christa Gaskill
- Division of Allergy, Pulmonary, and Critical Care, Department of Medicine (J.D.W., C.G., S.S., J.B., S.G., C.M., H.T., T.S.B., S.M.M.), Vanderbilt University Medical Center, Nashville, TN
| | - Sheila Shay
- Division of Allergy, Pulmonary, and Critical Care, Department of Medicine (J.D.W., C.G., S.S., J.B., S.G., C.M., H.T., T.S.B., S.M.M.), Vanderbilt University Medical Center, Nashville, TN
| | - Christine Scott
- From the Department of Biomedical Engineering (N.C.B., C.R.C., J.C.S., C.S., R.D., W.D.M.), Vanderbilt University Medical Center, Nashville, TN
| | - Julie Bastarache
- Division of Allergy, Pulmonary, and Critical Care, Department of Medicine (J.D.W., C.G., S.S., J.B., S.G., C.M., H.T., T.S.B., S.M.M.), Vanderbilt University Medical Center, Nashville, TN
| | - Santhi Gladson
- Division of Allergy, Pulmonary, and Critical Care, Department of Medicine (J.D.W., C.G., S.S., J.B., S.G., C.M., H.T., T.S.B., S.M.M.), Vanderbilt University Medical Center, Nashville, TN
| | - Christy Moore
- Division of Allergy, Pulmonary, and Critical Care, Department of Medicine (J.D.W., C.G., S.S., J.B., S.G., C.M., H.T., T.S.B., S.M.M.), Vanderbilt University Medical Center, Nashville, TN
| | - Reid D'Amico
- From the Department of Biomedical Engineering (N.C.B., C.R.C., J.C.S., C.S., R.D., W.D.M.), Vanderbilt University Medical Center, Nashville, TN
| | - Evan L Brittain
- Division of Cardiovascular Medicine, Department of Medicine (E.L.B.), Vanderbilt University Medical Center, Nashville, TN
| | - Harikrishna Tanjore
- Division of Allergy, Pulmonary, and Critical Care, Department of Medicine (J.D.W., C.G., S.S., J.B., S.G., C.M., H.T., T.S.B., S.M.M.), Vanderbilt University Medical Center, Nashville, TN
| | - Timothy S Blackwell
- Division of Allergy, Pulmonary, and Critical Care, Department of Medicine (J.D.W., C.G., S.S., J.B., S.G., C.M., H.T., T.S.B., S.M.M.), Vanderbilt University Medical Center, Nashville, TN.,Department of Veterans Affairs Medical Center, Nashville, TN (T.S.B.)
| | - Susan M Majka
- Division of Allergy, Pulmonary, and Critical Care, Department of Medicine (J.D.W., C.G., S.S., J.B., S.G., C.M., H.T., T.S.B., S.M.M.), Vanderbilt University Medical Center, Nashville, TN
| | - W David Merryman
- From the Department of Biomedical Engineering (N.C.B., C.R.C., J.C.S., C.S., R.D., W.D.M.), Vanderbilt University Medical Center, Nashville, TN
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3
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Gaskill CF, Carrier EJ, Kropski JA, Bloodworth NC, Menon S, Foronjy RF, Taketo MM, Hong CC, Austin ED, West JD, Means AL, Loyd JE, Merryman WD, Hemnes AR, De Langhe S, Blackwell TS, Klemm DJ, Majka SM. Disruption of lineage specification in adult pulmonary mesenchymal progenitor cells promotes microvascular dysfunction. J Clin Invest 2017; 127:2262-2276. [PMID: 28463231 DOI: 10.1172/jci88629] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 03/02/2017] [Indexed: 01/04/2023] Open
Abstract
Pulmonary vascular disease is characterized by remodeling and loss of microvessels and is typically attributed to pathological responses in vascular endothelium or abnormal smooth muscle cell phenotypes. We have challenged this understanding by defining an adult pulmonary mesenchymal progenitor cell (MPC) that regulates both microvascular function and angiogenesis. The current understanding of adult MPCs and their roles in homeostasis versus disease has been limited by a lack of genetic markers with which to lineage label multipotent mesenchyme and trace the differentiation of these MPCs into vascular lineages. Here, we have shown that lineage-labeled lung MPCs expressing the ATP-binding cassette protein ABCG2 (ABCG2+) are pericyte progenitors that participate in microvascular homeostasis as well as adaptive angiogenesis. Activation of Wnt/β-catenin signaling, either autonomously or downstream of decreased BMP receptor signaling, enhanced ABCG2+ MPC proliferation but suppressed MPC differentiation into a functional pericyte lineage. Thus, enhanced Wnt/β-catenin signaling in ABCG2+ MPCs drives a phenotype of persistent microvascular dysfunction, abnormal angiogenesis, and subsequent exacerbation of bleomycin-induced fibrosis. ABCG2+ MPCs may, therefore, account in part for the aberrant microvessel function and remodeling that are associated with chronic lung diseases.
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Affiliation(s)
- Christa F Gaskill
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine or Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee USA
| | - Erica J Carrier
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine or Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee USA
| | - Jonathan A Kropski
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine or Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee USA
| | | | - Swapna Menon
- Pulmonary Vascular Research Institute, Kochi, and AnalyzeDat Consulting Services, Kerala, India
| | - Robert F Foronjy
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, SUNY Downstate Medical Center, Brooklyn, New York, USA
| | | | - Charles C Hong
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine or Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee USA.,Department of Pathology and Laboratory Medicine or Department of Medicine, Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, USA
| | | | - James D West
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine or Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee USA
| | - Anna L Means
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - James E Loyd
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine or Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee USA
| | - W David Merryman
- Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee USA
| | - Anna R Hemnes
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine or Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee USA
| | | | - Timothy S Blackwell
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine or Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee USA
| | - Dwight J Klemm
- Department of Medicine, Pulmonary and Critical Care Medicine, Gates Center for Regenerative Medicine and Stem Cell Biology, University of Colorado, Aurora, Colorado, USA.,Geriatric Research Education and Clinical Center, Eastern Colorado Health Care System, Denver, Colorado, USA
| | - Susan M Majka
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine or Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee USA.,Vanderbilt Center for Stem Cell Biology, Vanderbilt University, Nashville, Tennessee, USA
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4
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West JD, Carrier EJ, Bloodworth NC, Schroer AK, Chen P, Ryzhova LM, Gladson S, Shay S, Hutcheson JD, Merryman WD. Serotonin 2B Receptor Antagonism Prevents Heritable Pulmonary Arterial Hypertension. PLoS One 2016; 11:e0148657. [PMID: 26863209 PMCID: PMC4749293 DOI: 10.1371/journal.pone.0148657] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Accepted: 01/21/2016] [Indexed: 12/21/2022] Open
Abstract
Serotonergic anorexigens are the primary pharmacologic risk factor associated with pulmonary arterial hypertension (PAH), and the resulting PAH is clinically indistinguishable from the heritable form of disease, associated with BMPR2 mutations. Both BMPR2 mutation and agonists to the serotonin receptor HTR2B have been shown to cause activation of SRC tyrosine kinase; conversely, antagonists to HTR2B inhibit SRC trafficking and downstream function. To test the hypothesis that a HTR2B antagonist can prevent BMRP2 mutation induced PAH by restricting aberrant SRC trafficking and downstream activity, we exposed BMPR2 mutant mice, which spontaneously develop PAH, to a HTR2B antagonist, SB204741, to block the SRC activation caused by BMPR2 mutation. SB204741 prevented the development of PAH in BMPR2 mutant mice, reduced recruitment of inflammatory cells to their lungs, and reduced muscularization of their blood vessels. By atomic force microscopy, we determined that BMPR2 mutant mice normally had a doubling of vessel stiffness, which was substantially normalized by HTR2B inhibition. SB204741 reduced SRC phosphorylation and downstream activity in BMPR2 mutant mice. Gene expression arrays indicate that the primary changes were in cytoskeletal and muscle contractility genes. These results were confirmed by gel contraction assays showing that HTR2B inhibition nearly normalizes the 400% increase in gel contraction normally seen in BMPR2 mutant smooth muscle cells. Heritable PAH results from increased SRC activation, cellular contraction, and vascular resistance, but antagonism of HTR2B prevents SRC phosphorylation, downstream activity, and PAH in BMPR2 mutant mice.
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MESH Headings
- Animals
- Bone Morphogenetic Protein Receptors, Type II/deficiency
- Bone Morphogenetic Protein Receptors, Type II/genetics
- Cell Movement/drug effects
- Cytoskeletal Proteins/genetics
- Cytoskeletal Proteins/metabolism
- Gene Expression Profiling
- Gene Expression Regulation
- Hypertension, Pulmonary/genetics
- Hypertension, Pulmonary/metabolism
- Hypertension, Pulmonary/pathology
- Hypertension, Pulmonary/prevention & control
- Indoles/pharmacology
- Lung/drug effects
- Lung/metabolism
- Lung/pathology
- Mice
- Mice, Transgenic
- Muscle Contraction/drug effects
- Muscle Proteins/genetics
- Muscle Proteins/metabolism
- Mutation
- Myocytes, Smooth Muscle/drug effects
- Myocytes, Smooth Muscle/metabolism
- Myocytes, Smooth Muscle/pathology
- Oligonucleotide Array Sequence Analysis
- Phosphorylation
- Protein Transport
- Receptor, Serotonin, 5-HT2B/genetics
- Receptor, Serotonin, 5-HT2B/metabolism
- Serotonin Antagonists/pharmacology
- Signal Transduction
- Urea/analogs & derivatives
- Urea/pharmacology
- Vascular Stiffness/drug effects
- src-Family Kinases/antagonists & inhibitors
- src-Family Kinases/genetics
- src-Family Kinases/metabolism
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Affiliation(s)
- James D. West
- Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, 37232, United States of America
- * E-mail: (JDW); (WDM)
| | - Erica J. Carrier
- Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, 37232, United States of America
| | - Nathaniel C. Bloodworth
- Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee, 37232, United States of America
| | - Alison K. Schroer
- Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee, 37232, United States of America
| | - Peter Chen
- Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, 37232, United States of America
| | - Larisa M. Ryzhova
- Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee, 37232, United States of America
| | - Santhi Gladson
- Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, 37232, United States of America
| | - Sheila Shay
- Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, 37232, United States of America
| | - Joshua D. Hutcheson
- Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee, 37232, United States of America
| | - W. David Merryman
- Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee, 37232, United States of America
- * E-mail: (JDW); (WDM)
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5
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Affiliation(s)
- Nathaniel C Bloodworth
- From the Departments of Biomedical Engineering (N.C.B., W.D.M.) and Pulmonary and Critical Care Medicine (J.D.W.), Vanderbilt University, Nashville, TN
| | - James D West
- From the Departments of Biomedical Engineering (N.C.B., W.D.M.) and Pulmonary and Critical Care Medicine (J.D.W.), Vanderbilt University, Nashville, TN
| | - W David Merryman
- From the Departments of Biomedical Engineering (N.C.B., W.D.M.) and Pulmonary and Critical Care Medicine (J.D.W.), Vanderbilt University, Nashville, TN.
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6
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West JD, Austin ED, Gaskill C, Marriott S, Baskir R, Bilousova G, Jean JC, Hemnes AR, Menon S, Bloodworth NC, Fessel JP, Kropski JA, Irwin D, Ware LB, Wheeler L, Hong CC, Meyrick B, Loyd JE, Bowman AB, Ess KC, Klemm DJ, Young PP, Merryman WD, Kotton D, Majka SM. Identification of a common Wnt-associated genetic signature across multiple cell types in pulmonary arterial hypertension. Am J Physiol Cell Physiol 2014; 307:C415-30. [PMID: 24871858 DOI: 10.1152/ajpcell.00057.2014] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Understanding differences in gene expression that increase risk for pulmonary arterial hypertension (PAH) is essential to understanding the molecular basis for disease. Previous studies on patient samples were limited by end-stage disease effects or by use of nonadherent cells, which are not ideal to model vascular cells in vivo. These studies addressed the hypothesis that pathological processes associated with PAH may be identified via a genetic signature common across multiple cell types. Expression array experiments were initially conducted to analyze cell types at different stages of vascular differentiation (mesenchymal stromal and endothelial) derived from PAH patient-specific induced pluripotent stem (iPS) cells. Molecular pathways that were altered in the PAH cell lines were then compared with those in fibroblasts from 21 patients, including those with idiopathic and heritable PAH. Wnt was identified as a target pathway and was validated in vitro using primary patient mesenchymal and endothelial cells. Taken together, our data suggest that the molecular lesions that cause PAH are present in all cell types evaluated, regardless of origin, and that stimulation of the Wnt signaling pathway was a common molecular defect in both heritable and idiopathic PAH.
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Affiliation(s)
- James D West
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University, Nashville, Tennessee; Vanderbilt Vascular Biology Center, Nashville, Tennessee
| | - Eric D Austin
- Department of Pediatrics, Vanderbilt University, Nashville, Tennessee
| | - Christa Gaskill
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University, Nashville, Tennessee
| | - Shennea Marriott
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University, Nashville, Tennessee
| | - Rubin Baskir
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University, Nashville, Tennessee; Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Ganna Bilousova
- Gates Center for Regenerative Medicine and Stem Cell Biology, University of Colorado, Aurora, Colorado
| | | | - Anna R Hemnes
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University, Nashville, Tennessee; Vanderbilt Vascular Biology Center, Nashville, Tennessee
| | - Swapna Menon
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University, Nashville, Tennessee
| | | | - Joshua P Fessel
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University, Nashville, Tennessee; Vanderbilt Vascular Biology Center, Nashville, Tennessee
| | - Johnathan A Kropski
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University, Nashville, Tennessee
| | - David Irwin
- Gates Center for Regenerative Medicine and Stem Cell Biology, University of Colorado, Aurora, Colorado
| | - Lorraine B Ware
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University, Nashville, Tennessee; Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, Tennessee
| | - Lisa Wheeler
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University, Nashville, Tennessee
| | - Charles C Hong
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee; Veterans Administration Hospital, Nashville, Tennessee
| | - Barbara Meyrick
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University, Nashville, Tennessee; Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, Tennessee
| | - James E Loyd
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University, Nashville, Tennessee
| | - Aaron B Bowman
- Department of Neurology, Vanderbilt Brain Institute, Nashville, Tennessee; Vanderbilt Center for Stem Cell Biology, Nashville, Tennessee
| | - Kevin C Ess
- Department of Pediatrics, Vanderbilt University, Nashville, Tennessee; Department of Neurology, Vanderbilt Brain Institute, Nashville, Tennessee; Vanderbilt Center for Stem Cell Biology, Nashville, Tennessee
| | - Dwight J Klemm
- Gates Center for Regenerative Medicine and Stem Cell Biology, University of Colorado, Aurora, Colorado
| | - Pampee P Young
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, Tennessee; Vanderbilt Center for Stem Cell Biology, Nashville, Tennessee
| | - W David Merryman
- Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee
| | | | - Susan M Majka
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University, Nashville, Tennessee; Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee; Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, Tennessee; Vanderbilt Center for Stem Cell Biology, Nashville, Tennessee; Vanderbilt Vascular Biology Center, Nashville, Tennessee; Pulmonary Vascular Research Institute, Kochi, and AnalyzeDat Consulting Services, Kerala, India; and
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7
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Hamilton SK, Bloodworth NC, Massad CS, Hammoudi TM, Suri S, Yang PJ, Lu H, Temenoff JS. Development of 3D hydrogel culture systems with on-demand cell separation. Biotechnol J 2013; 8:485-95. [PMID: 23447378 PMCID: PMC3747669 DOI: 10.1002/biot.201200200] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Revised: 12/14/2012] [Accepted: 01/30/2013] [Indexed: 01/04/2023]
Abstract
Recently there has been an increased interest in the effects of paracrine signaling between groups of cells, particularly in the context of better understanding how stem cells contribute to tissue repair. Most current 3D co-culture methods lack the ability to effectively separate two cell populations after the culture period, which is important for simultaneously analyzing the reciprocal effects of each cell type on the other. Here, we detail the development of a 3D hydrogel co-culture system that allows us to culture different cell types for up to 7 days and subsequently separate and isolate the different cell populations using enzyme-sensitive glues. Separable 3D co-culture laminates were prepared by laminating PEG-based hydrogels with enzyme-degradable hydrogel adhesives. Encapsulated cell populations exhibited good segregation with well-defined interfaces. Furthermore, constructs can be separated on-demand upon addition of the appropriate enzyme, while cell viability remains high throughout the culture period, even after laminate separation. This platform offers great potential for a variety of basic cell signaling studies as the incorporation of an enzyme-sensitive adhesive interface allows the on-demand separation of individual cell populations for immediate analysis or further culture to examine persistence of co-culture effects and paracrine signaling on cell populations.
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Affiliation(s)
- Sharon K. Hamilton
- W.H Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University 313 Ferst Drive, Room 2112 Atlanta, GA 30332
- Department of Chemical & Biomolecular Engineering Georgia Institute of Technology 311 Ferst Drive NW Atlanta, GA 30332
| | - Nathaniel C. Bloodworth
- W.H Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University 313 Ferst Drive, Room 2112 Atlanta, GA 30332
| | - Christopher S. Massad
- W.H Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University 313 Ferst Drive, Room 2112 Atlanta, GA 30332
| | - Taymour M. Hammoudi
- W.H Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University 313 Ferst Drive, Room 2112 Atlanta, GA 30332
| | - Shalu Suri
- Department of Chemical & Biomolecular Engineering Georgia Institute of Technology 311 Ferst Drive NW Atlanta, GA 30332
| | - Peter J. Yang
- W.H Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University 313 Ferst Drive, Room 2112 Atlanta, GA 30332
| | - Hang Lu
- Department of Chemical & Biomolecular Engineering Georgia Institute of Technology 311 Ferst Drive NW Atlanta, GA 30332
| | - Johnna S. Temenoff
- W.H Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University 313 Ferst Drive, Room 2112 Atlanta, GA 30332
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8
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Lim JJ, Hammoudi TM, Bratt-Leal AM, Hamilton SK, Kepple KL, Bloodworth NC, McDevitt TC, Temenoff JS. Development of nano- and microscale chondroitin sulfate particles for controlled growth factor delivery. Acta Biomater 2011; 7:986-95. [PMID: 20965281 DOI: 10.1016/j.actbio.2010.10.009] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2010] [Revised: 10/13/2010] [Accepted: 10/14/2010] [Indexed: 01/08/2023]
Abstract
Size scale plays an important role in the release properties and cellular presentation of drug delivery vehicles. Because negatively charged chondroitin sulfate (CS) is capable of electrostatically sequestering positively charged growth factors, CS-derived nanoscale micelles and microscale spheroids were synthesized as potential growth factor carriers to enhance differentiation of stem cells. Particles were characterized for morphology, size distribution, surface charge and cytocompatibility, as well as release of transforming growth factor-β1 (TGF-β1) and tumor necrosis factor-α (TNF-α). CS micelles were spherical and negatively charged with a bimodal distribution of 324.1±8.5 and 73.2±4.4 nm diameters, and CS microspheres possessed a rounded morphology and a diameter of 4.3±0.93 μm. Positively charged TGF-β1 demonstrated minimal release after loading in CS microspheres, while negatively charged TNF-α exhibited substantial release over the first 15 h, suggesting that TGF-β1 electrostatically complexed with CS. The micelles and microparticles were found to be cytocompatible at moderate concentrations with marrow stromal cell monolayers and within embryonic stem cell embryoid bodies. These synthesis techniques, which allow the formation of CS-based carriers over a variety of nano- and microscale sizes, offer versatility for tailored release of positively charged growth factors and controlled CS presentation for a variety of stem cell-based applications in tissue engineering and regenerative medicine.
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