1
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Henderson T, Christman KL, Alperin M. Regenerative Medicine in Urogynecology: Where We Are and Where We Want to Be. Urogynecology (Phila) 2024; 30:519-527. [PMID: 38683203 DOI: 10.1097/spv.0000000000001461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
ABSTRACT Pelvic floor disorders (PFDs) constitute a major public health issue given their negative effect on quality of life for millions of women worldwide and the associated economic burden. As the prevalence of PFDs continues to increase, novel therapeutic approaches for the effective treatment of these disorders are urgently needed. Regenerative medicine techniques, including cellular therapies, extracellular vesicles, secretomes, platelet-rich plasma, laser therapy, and bioinductive acellular biomaterial scaffolds, are emerging as viable clinical options to counteract urinary and fecal incontinence, as well as pelvic organ prolapse. This brief expert review explores the current state-of-science regarding application of these therapies for the treatment of PFDs. Although regenerative approaches have not been widely deployed in clinical care to date, these innovative techniques show a promising safety profile and potential to positively affect the quality of life of patients with PFDs. Furthermore, investigations focused on regeneration of the main constituents of the pelvic floor and lower urinary tract improve our understanding of the underlying pathophysiology of PFDs. Regenerative medicine techniques have a high potential not only to revolutionize treatment of PFDs but also to prevent these complex conditions.
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Affiliation(s)
- Tatyanna Henderson
- From the Division of Urogynecology and Reconstructive Pelvic Surgery, Department of Obstetrics, Gynecology, and Reproductive Sciences
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2
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Hunter JD, Mesfin JM, Ahmed T, Chen A, Reimold K, Hancko A, Braden RL, Davis ME, Christman KL. Myocardial Matrix Hydrogels Mitigate Negative Remodeling and Improve Function in Right Heart Failure Model. JACC Basic Transl Sci 2024; 9:322-338. [PMID: 38559631 PMCID: PMC10978413 DOI: 10.1016/j.jacbts.2024.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 01/04/2024] [Accepted: 01/08/2024] [Indexed: 04/04/2024]
Abstract
This study evaluates the effectiveness of myocardial matrix (MM) hydrogels in mitigating negative right ventricular (RV) remodeling in a rat model of RV heart failure. The goal was to assess whether a hydrogel derived from either the right or left ventricle could promote cardiac repair. Injured rat right ventricles were injected with either RV-or left ventricular-derived MM hydrogels. Both hydrogels improved RV function and morphology and reduced negative remodeling. This study supports the potential of injectable biomaterial therapies for treating RV heart failure.
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Affiliation(s)
- Jervaughn D. Hunter
- Shu Chien-Gene Lay Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California-San Diego, San Diego, California, USA
| | - Joshua M. Mesfin
- Shu Chien-Gene Lay Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California-San Diego, San Diego, California, USA
| | - Tanzeel Ahmed
- Shu Chien-Gene Lay Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California-San Diego, San Diego, California, USA
| | - Alexander Chen
- Shu Chien-Gene Lay Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California-San Diego, San Diego, California, USA
| | - Kate Reimold
- Shu Chien-Gene Lay Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California-San Diego, San Diego, California, USA
| | - Arielle Hancko
- Shu Chien-Gene Lay Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California-San Diego, San Diego, California, USA
| | - Rebecca L. Braden
- Shu Chien-Gene Lay Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California-San Diego, San Diego, California, USA
| | - Michael E. Davis
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, USA
| | - Karen L. Christman
- Shu Chien-Gene Lay Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California-San Diego, San Diego, California, USA
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3
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Bender RHF, O’Donnell BT, Shergill B, Pham BQ, Tahmouresie S, Sanchez CN, Juat DJ, Hatch MMS, Shirure VS, Wortham M, Nguyen-Ngoc KV, Jun Y, Gaetani R, Christman KL, Teyton L, George SC, Sander M, Hughes CCW. A vascularized 3D model of the human pancreatic islet for ex vivostudy of immune cell-islet interaction. Biofabrication 2024; 16:025001. [PMID: 38128127 PMCID: PMC10782895 DOI: 10.1088/1758-5090/ad17d0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 08/16/2023] [Revised: 11/24/2023] [Accepted: 12/21/2023] [Indexed: 12/23/2023]
Abstract
Insulin is an essential regulator of blood glucose homeostasis that is produced exclusively byβcells within the pancreatic islets of healthy individuals. In those affected by diabetes, immune inflammation, damage, and destruction of isletβcells leads to insulin deficiency and hyperglycemia. Current efforts to understand the mechanisms underlyingβcell damage in diabetes rely onin vitro-cultured cadaveric islets. However, isolation of these islets involves removal of crucial matrix and vasculature that supports islets in the intact pancreas. Unsurprisingly, these islets demonstrate reduced functionality over time in standard culture conditions, thereby limiting their value for understanding native islet biology. Leveraging a novel, vascularized micro-organ (VMO) approach, we have recapitulated elements of the native pancreas by incorporating isolated human islets within a three-dimensional matrix nourished by living, perfusable blood vessels. Importantly, these islets show long-term viability and maintain robust glucose-stimulated insulin responses. Furthermore, vessel-mediated delivery of immune cells to these tissues provides a model to assess islet-immune cell interactions and subsequent islet killing-key steps in type 1 diabetes pathogenesis. Together, these results establish the islet-VMO as a novel,ex vivoplatform for studying human islet biology in both health and disease.
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Affiliation(s)
- R Hugh F Bender
- Department of Molecular Biology & Biochemistry, University of California, Irvine, CA, United States of America
| | - Benjamen T O’Donnell
- Department of Molecular Biology & Biochemistry, University of California, Irvine, CA, United States of America
| | - Bhupinder Shergill
- Department of Biomedical Engineering, University of California, Davis, CA, United States of America
| | - Brittany Q Pham
- Department of Molecular Biology & Biochemistry, University of California, Irvine, CA, United States of America
| | - Sima Tahmouresie
- Department of Molecular Biology & Biochemistry, University of California, Irvine, CA, United States of America
| | - Celeste N Sanchez
- Department of Molecular Biology & Biochemistry, University of California, Irvine, CA, United States of America
| | - Damie J Juat
- Department of Molecular Biology & Biochemistry, University of California, Irvine, CA, United States of America
| | - Michaela M S Hatch
- Department of Molecular Biology & Biochemistry, University of California, Irvine, CA, United States of America
| | - Venktesh S Shirure
- Department of Biomedical Engineering, University of California, Davis, CA, United States of America
| | - Matthew Wortham
- Pediatric Diabetes Research Center, Department of Pediatrics, University of California, San Diego, CA, United States of America
| | - Kim-Vy Nguyen-Ngoc
- Pediatric Diabetes Research Center, Department of Pediatrics, University of California, San Diego, CA, United States of America
| | - Yesl Jun
- Pediatric Diabetes Research Center, Department of Pediatrics, University of California, San Diego, CA, United States of America
| | - Roberto Gaetani
- Department of Bioengineering, University of California, San Diego, CA, United States of America
- Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | - Karen L Christman
- Department of Cellular & Molecular Medicine, University of California, San Diego, CA, United States of America
- Department of Bioengineering, University of California, San Diego, CA, United States of America
| | - Luc Teyton
- Department of Immunology & Microbiology, The Scripps Research Institute, San Diego, CA, United States of America
| | - Steven C George
- Department of Biomedical Engineering, University of California, Davis, CA, United States of America
| | - Maike Sander
- Pediatric Diabetes Research Center, Department of Pediatrics, University of California, San Diego, CA, United States of America
- Department of Cellular & Molecular Medicine, University of California, San Diego, CA, United States of America
| | - Christopher C W Hughes
- Department of Molecular Biology & Biochemistry, University of California, Irvine, CA, United States of America
- Department of Biomedical Engineering, University of California, Irvine, CA, United States of America
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4
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Sullivan H, Liang Y, Worthington K, Luo C, Gianneschi NC, Christman KL. Enzyme-Responsive Nanoparticles for the Targeted Delivery of an MMP Inhibitor to Acute Myocardial Infarction. Biomacromolecules 2023; 24:4695-4704. [PMID: 37695847 PMCID: PMC10646957 DOI: 10.1021/acs.biomac.3c00421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 08/21/2023] [Indexed: 09/13/2023]
Abstract
Herein, we have developed a drug-loaded matrix metalloproteinase (MMP)-responsive micellar nanoparticle (NP) intended for minimally invasive intravenous injection during the acute phase of myocardial infarction (MI) and prolonged retention in the heart for small-molecule drug delivery. Peptide-polymer amphiphiles (PPAs) bearing a small-molecule MMP inhibitor (MMPi), PD166793, were synthesized via ring-opening metathesis polymerization (ROMP) and formulated into spherical micelles by transitioning to aqueous solution. The resulting micellar NPs underwent MMP-induced aggregation, demonstrating enzyme responsiveness. Using a rat MI model, we observed that these NPs were capable of successfully extravasating into the infarcted region of the heart where they were retained due to the active, enzyme-mediated targeting, remaining detectable after 1 week post administration without increasing macrophage recruitment. Furthermore, in vitro studies show that these NPs demonstrated successful drug release following MMP treatment and maintained drug bioactivity as evidenced by comparable MMP inhibition to free MMPi. This work establishes a targeted NP platform for delivering small-molecule therapeutics to the heart after MI, opening possibilities for myocardial infarction treatment.
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Affiliation(s)
- Holly
L. Sullivan
- Shu
Chien-Gene Lay Department of Bioengineering and the Sanford Consortium
for Regenerative Medicine, University of
California San Diego, La Jolla, California 92093, United States
| | - Yifei Liang
- Department
of Chemistry, International Institute for Nanotechnology, Simpson-Querrey
Institute, Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois 60208, United States
| | - Kendra Worthington
- Shu
Chien-Gene Lay Department of Bioengineering and the Sanford Consortium
for Regenerative Medicine, University of
California San Diego, La Jolla, California 92093, United States
| | - Colin Luo
- Shu
Chien-Gene Lay Department of Bioengineering and the Sanford Consortium
for Regenerative Medicine, University of
California San Diego, La Jolla, California 92093, United States
| | - Nathan C. Gianneschi
- Department
of Chemistry, International Institute for Nanotechnology, Simpson-Querrey
Institute, Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois 60208, United States
- Departments
of Materials Science & Engineering, Biomedical Engineering and
Pharmacology, Northwestern University, Evanston, Illinois 60208, United States
- Department
of Chemistry & Biochemistry, University
of California San Diego, La Jolla, California 92093, United States
| | - Karen L. Christman
- Shu
Chien-Gene Lay Department of Bioengineering and the Sanford Consortium
for Regenerative Medicine, University of
California San Diego, La Jolla, California 92093, United States
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5
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Diaz MD, Kandell RM, Wu JR, Chen A, Christman KL, Kwon EJ. Infusible Extracellular Matrix Biomaterial Promotes Vascular Integrity and Modulates the Inflammatory Response in Acute Traumatic Brain Injury. Adv Healthc Mater 2023; 12:e2300782. [PMID: 37390094 PMCID: PMC10592293 DOI: 10.1002/adhm.202300782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 03/13/2023] [Revised: 06/23/2023] [Accepted: 06/27/2023] [Indexed: 07/02/2023]
Abstract
Traumatic brain injury (TBI) affects millions of people each year and, in many cases, results in long-term disabilities. Once a TBI has occurred, there is a significant breakdown of the blood-brain barrier resulting in increased vascular permeability and progression of the injury. In this study, the use of an infusible extracellular matrix-derived biomaterial (iECM) for its ability to reduce vascular permeability and modulate gene expression in the injured brain is investigated. First, the pharmacokinetics of iECM administration in a mouse model of TBI is characterized, and the robust accumulation of iECM at the site of injury is demonstrated. Next, it is shown that iECM administration after injury can reduce the extravasation of molecules into the brain, and in vitro, iECM increases trans-endothelial electrical resistance across a monolayer of TNFα-stimulated endothelial cells. In gene expression analysis of brain tissue, iECM induces changes that are indicative of downregulation of the proinflammatory response 1-day post-injury/treatment and neuroprotection at 5 days post-injury/treatment. Therefore, iECM shows potential as a treatment for TBI.
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Affiliation(s)
- Miranda D. Diaz
- Shu-Chien Gene Lay Department of Bioengineering, University of California San Diego
- Sanford Consortium for Regenerative Medicine
| | - Rebecca M. Kandell
- Shu-Chien Gene Lay Department of Bioengineering, University of California San Diego
- Sanford Consortium for Regenerative Medicine
| | - Jason R. Wu
- Shu-Chien Gene Lay Department of Bioengineering, University of California San Diego
- Sanford Consortium for Regenerative Medicine
| | - Alexander Chen
- Shu-Chien Gene Lay Department of Bioengineering, University of California San Diego
- Sanford Consortium for Regenerative Medicine
| | - Karen L. Christman
- Shu-Chien Gene Lay Department of Bioengineering, University of California San Diego
- Sanford Consortium for Regenerative Medicine
| | - Ester J. Kwon
- Shu-Chien Gene Lay Department of Bioengineering, University of California San Diego
- Sanford Consortium for Regenerative Medicine
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6
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Wang RM, Mesfin JM, Karkanitsa M, Ungerleider JL, Zelus E, Zhang Y, Kawakami Y, Kawakami Y, Kawakami T, Christman KL. Immunomodulatory contribution of mast cells to the regenerative biomaterial microenvironment. NPJ Regen Med 2023; 8:53. [PMID: 37730736 PMCID: PMC10511634 DOI: 10.1038/s41536-023-00324-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 08/31/2023] [Indexed: 09/22/2023] Open
Abstract
Bioactive immunomodulatory biomaterials have shown promise for influencing the immune response to promote tissue repair and regeneration. Macrophages and T cells have been associated with this response; however, other immune cell types have been traditionally overlooked. In this study, we investigated the role of mast cells in the regulation of the immune response to decellularized biomaterial scaffolds using a subcutaneous implant model. In mast cell-deficient mice, there was dysregulation of the expected M1 to M2 macrophage transition typically induced by the biomaterial scaffold. Polarization progression deviated in a sex-specific manner with an early transition to an M2 profile in female mice, while the male response was unable to properly transition past a pro-inflammatory M1 state. Both were reversed with adoptive mast cell transfer. Further investigation of the later-stage immune response in male mice determined a greater sustained pro-inflammatory gene expression profile, including the IL-1 cytokine family, IL-6, alarmins, and chemokines. These results highlight mast cells as another important cell type that influences the immune response to pro-regenerative biomaterials.
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Affiliation(s)
- Raymond M Wang
- Shu Chien-Gene Lay Department of Bioengineering, Sanford Consortium of Regenerative Medicine, University of California San Diego, 2880 Torrey Pines Scenic Drive, La Jolla, CA, 92037, USA
| | - Joshua M Mesfin
- Shu Chien-Gene Lay Department of Bioengineering, Sanford Consortium of Regenerative Medicine, University of California San Diego, 2880 Torrey Pines Scenic Drive, La Jolla, CA, 92037, USA
| | - Maria Karkanitsa
- Shu Chien-Gene Lay Department of Bioengineering, Sanford Consortium of Regenerative Medicine, University of California San Diego, 2880 Torrey Pines Scenic Drive, La Jolla, CA, 92037, USA
| | - Jessica L Ungerleider
- Shu Chien-Gene Lay Department of Bioengineering, Sanford Consortium of Regenerative Medicine, University of California San Diego, 2880 Torrey Pines Scenic Drive, La Jolla, CA, 92037, USA
| | - Emma Zelus
- Shu Chien-Gene Lay Department of Bioengineering, Sanford Consortium of Regenerative Medicine, University of California San Diego, 2880 Torrey Pines Scenic Drive, La Jolla, CA, 92037, USA
| | - Yuxue Zhang
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Yu Kawakami
- Laboratory of Allergic Diseases, Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, California, 92037, USA
- Department of Dermatology, University of California San Diego, School of Medicine, La Jolla, CA, 92093, USA
| | - Yuko Kawakami
- Laboratory of Allergic Diseases, Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, California, 92037, USA
- Department of Dermatology, University of California San Diego, School of Medicine, La Jolla, CA, 92093, USA
| | - Toshiaki Kawakami
- Laboratory of Allergic Diseases, Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, California, 92037, USA
- Department of Dermatology, University of California San Diego, School of Medicine, La Jolla, CA, 92093, USA
| | - Karen L Christman
- Shu Chien-Gene Lay Department of Bioengineering, Sanford Consortium of Regenerative Medicine, University of California San Diego, 2880 Torrey Pines Scenic Drive, La Jolla, CA, 92037, USA.
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7
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Duran P, Sesillo FB, Cook M, Burnett L, Menefee SA, Do E, French S, Zazueta-Damian G, Dzieciatkowska M, Saviola AJ, Shah MM, Sanvictores C, Osborn KG, Hansen KC, Shtrahman M, Christman KL, Alperin M. Proregenerative extracellular matrix hydrogel mitigates pathological alterations of pelvic skeletal muscles after birth injury. Sci Transl Med 2023; 15:eabj3138. [PMID: 37531414 PMCID: PMC10460616 DOI: 10.1126/scitranslmed.abj3138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 07/14/2023] [Indexed: 08/04/2023]
Abstract
Pelvic floor disorders, including pelvic organ prolapse and urinary and fecal incontinence, affect millions of women globally and represent a major public health concern. Pelvic floor muscle (PFM) dysfunction has been identified as one of the leading risk factors for the development of these morbid conditions. Childbirth, specifically vaginal delivery, has been recognized as the most important potentially modifiable risk factor for PFM injury; however, the precise mechanisms of PFM dysfunction after parturition remain elusive. In this study, we demonstrated that PFMs exhibit atrophy and fibrosis in parous women with symptomatic pelvic organ prolapse. These pathological alterations were recapitulated in a preclinical rat model of simulated birth injury (SBI). The transcriptional signature of PFMs after injury demonstrated an impairment in muscle anabolism, persistent expression of genes that promote extracellular matrix (ECM) deposition, and a sustained inflammatory response. We also evaluated the administration of acellular injectable skeletal muscle ECM hydrogel for the prevention of these pathological alterations. Treatment of PFMs with the ECM hydrogel either at the time of birth injury or 4 weeks after injury mitigated PFM atrophy and fibrosis. By evaluating gene expression, we demonstrated that these changes are mainly driven by the hydrogel-induced enhancement of endogenous myogenesis, ECM remodeling, and modulation of the immune response. This work furthers our understanding of PFM birth injury and demonstrates proof of concept for future investigations of proregenerative biomaterial approaches for the treatment of injured pelvic soft tissues.
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Affiliation(s)
- Pamela Duran
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA 92093, USA
- Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA 92037, USA
| | - Francesca Boscolo Sesillo
- Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA 92037, USA
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Division of Female Pelvic Medicine and Reconstructive Surgery, University of California San Diego, La Jolla, CA 92093, USA
| | - Mark Cook
- Department of Integrative, Biology and Physiology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Lindsey Burnett
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Division of Female Pelvic Medicine and Reconstructive Surgery, University of California San Diego, La Jolla, CA 92093, USA
| | - Shawn A. Menefee
- Department of Obstetrics and Gynecology, Division of Female Pelvic Medicine and Reconstructive Surgery, Kaiser Permanente, San Diego, CA 92110, USA
| | - Emmy Do
- Department of Biology, University of California San Diego, La Jolla, CA 92093, USA
| | - Saya French
- Department of Biology, University of California San Diego, La Jolla, CA 92093, USA
| | - Gisselle Zazueta-Damian
- Department of Obstetrics and Gynecology, Division of Female Pelvic Medicine and Reconstructive Surgery, Kaiser Permanente, San Diego, CA 92110, USA
| | - Monika Dzieciatkowska
- Department of Biochemistry and Molecular Genetics, School of Medicine, University of Colorado, Aurora, CO 80045, USA
| | - Anthony J. Saviola
- Department of Biochemistry and Molecular Genetics, School of Medicine, University of Colorado, Aurora, CO 80045, USA
| | - Manali M. Shah
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA 92093, USA
| | - Clyde Sanvictores
- Department of Physics, University of California San Diego, La Jolla, CA 92093, USA
| | - Kent G. Osborn
- Center for Veterinary Sciences and Comparative Medicine, Division of Comparative Pathology and Medicine, University of California San Diego, La Jolla, CA 92093, USA
| | - Kirk C. Hansen
- Department of Biochemistry and Molecular Genetics, School of Medicine, University of Colorado, Aurora, CO 80045, USA
| | - Matthew Shtrahman
- Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA 92037, USA
- Department of Neurosciences, University of California San Diego, La Jolla, CA 92093, USA
| | - Karen L. Christman
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA 92093, USA
- Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA 92037, USA
| | - Marianna Alperin
- Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA 92037, USA
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Division of Female Pelvic Medicine and Reconstructive Surgery, University of California San Diego, La Jolla, CA 92093, USA
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8
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Christman KL. Extracellular Matrix Biomaterial Therapy for Myocardial Infarction: New Delivery Route and Immunomodulatory Effects. JACC Basic Transl Sci 2023; 8:955-957. [PMID: 37719431 PMCID: PMC10504395 DOI: 10.1016/j.jacbts.2023.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/19/2023]
Affiliation(s)
- Karen L. Christman
- Shu Chien-Gene Lay Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California-San Diego, San Diego, California, USA
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9
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Cosgriff-Hernandez EM, Aguado BA, Akpa B, Fleming GC, Moore E, Porras AM, Boyle PM, Chan DD, Chesler N, Christman KL, Desai TA, Harley BAC, Hudalla GA, Killian ML, Maisel K, Maitland KC, Peyton SR, Pruitt BL, Stabenfeldt SE, Stevens KR, Bowden AK. Equitable hiring strategies towards a diversified faculty. Nat Biomed Eng 2023; 7:961-968. [PMID: 37580521 DOI: 10.1038/s41551-023-01076-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Affiliation(s)
| | - Brian A Aguado
- Shu Chien-Gene Lay Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA, USA
| | - Belinda Akpa
- Department of Chemical & Biomolecular Engineering, University of Tennessee-Knoxville, Knoxville, TN, USA
| | - Gabriella Coloyan Fleming
- Center for Equity in Engineering, The University of Texas at Austin, Austin, TX, USA
- Center for Engineering Education, The University of Texas at Austin, Austin, TX, USA
| | - Erika Moore
- Department of Material Science and Engineering, University of Florida, Gainesville, FL, USA
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, USA
| | - Ana Maria Porras
- Department of Biomedical Engineering, University of Florida, Gainesville, FL, USA
| | - Patrick M Boyle
- Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - Deva D Chan
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Naomi Chesler
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, USA
| | - Karen L Christman
- Shu Chien-Gene Lay Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA, USA
| | - Tejal A Desai
- School of Engineering, Brown University, Providence, RI, USA
| | - Brendan A C Harley
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Gregory A Hudalla
- Department of Biomedical Engineering, University of Florida, Gainesville, FL, USA
| | - Megan L Killian
- Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, MI, USA
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
| | - Katharina Maisel
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, USA
| | - Kristen C Maitland
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Shelly R Peyton
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, MA, USA
| | - Beth L Pruitt
- Department of Biological Engineering, University of California, Santa Barbara, CA, USA
- Department of Mechanical Engineering, University of California, Santa Barbara, CA, USA
- Department of Biomolecular Science and Engineering, University of California, Santa Barbara, CA, USA
| | - Sarah E Stabenfeldt
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, USA
| | - Kelly R Stevens
- Department of Biomedical Engineering, University of Florida, Gainesville, FL, USA
| | - Audrey K Bowden
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
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10
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Liang Y, Sullivan HL, Carrow K, Mesfin JM, Korpanty J, Worthington K, Luo C, Christman KL, Gianneschi NC. Inflammation-Responsive Micellar Nanoparticles from Degradable Polyphosphoramidates for Targeted Delivery to Myocardial Infarction. J Am Chem Soc 2023; 145:11185-11194. [PMID: 37184379 DOI: 10.1021/jacs.3c01054] [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: 05/16/2023]
Abstract
Nanoparticles that undergo a localized morphology change to target areas of inflammation have been previously developed but are limited by their lack of biodegradability. In this paper, we describe a low-ring-strain cyclic olefin monomer, 1,3-dimethyl-2-phenoxy-1,3,4,7-tetrahydro-1,3,2-diazaphosphepine 2-oxide (MePTDO), that rapidly polymerizes via ring-opening metathesis polymerization at room temperature to generate well-defined degradable polyphosphoramidates with high monomer conversion (>84%). Efficient MePTDO copolymerizations with norbornene-based monomers are demonstrated, including a norbornenyl monomer functionalized with a peptide substrate for inflammation-associated matrix metalloproteinases (MMPs). The resulting amphiphilic peptide brush copolymers self-assembled in aqueous solution to generate micellar nanoparticles (30 nm in diameter) which exhibit excellent cyto- and hemocompatibility and undergo MMP-induced assembly into micron-scale aggregates. As MMPs are upregulated in the heart postmyocardial infarction (MI), the MMP-responsive micelles were applied to target and accumulate in the infarcted heart following intravenous administration in a rat model of MI. These particles displayed a distinct biodistribution and clearance pattern in comparison to nondegradable analogues. Specifically, accumulation at the site of MI competed with elimination predominantly through the kidney rather than the liver. Together, these results suggest this as a promising new biodegradable platform for inflammation targeted delivery.
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Affiliation(s)
- Yifei Liang
- Department of Chemistry, International Institute for Nanotechnology, Simpson-Querrey Institute, Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois 60208, United States
| | - Holly L Sullivan
- Shu Chien-Gene Lay Department of Bioengineering and the Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, California 92037, United States
| | - Kendal Carrow
- Medical Scientist Training Program, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, United States
- Department of Biomedical Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Joshua M Mesfin
- Shu Chien-Gene Lay Department of Bioengineering and the Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, California 92037, United States
| | - Joanna Korpanty
- Department of Chemistry, International Institute for Nanotechnology, Simpson-Querrey Institute, Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois 60208, United States
| | - Kendra Worthington
- Shu Chien-Gene Lay Department of Bioengineering and the Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, California 92037, United States
| | - Colin Luo
- Shu Chien-Gene Lay Department of Bioengineering and the Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, California 92037, United States
| | - Karen L Christman
- Shu Chien-Gene Lay Department of Bioengineering and the Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, California 92037, United States
| | - Nathan C Gianneschi
- Department of Chemistry, International Institute for Nanotechnology, Simpson-Querrey Institute, Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois 60208, United States
- Department of Biomedical Engineering, Northwestern University, Evanston, Illinois 60208, United States
- Department of Materials Science & Engineering, Department of Pharmacology, Northwestern University, Evanston, Illinois 60208, United States
- Department of Chemistry & Biochemistry, University of California San Diego, La Jolla, California 92037, United States
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11
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Chen A, Mesfin JM, Gianneschi NC, Christman KL. Intravascularly Deliverable Biomaterial Platforms for Tissue Repair and Regeneration Post-Myocardial Infarction. Adv Mater 2023:e2300603. [PMID: 36989469 PMCID: PMC10539487 DOI: 10.1002/adma.202300603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 03/11/2023] [Indexed: 06/19/2023]
Abstract
Each year, nearly 19 million people die of cardiovascular disease with coronary heart disease and myocardial infarction (MI) as the leading cause of the progression of heart failure. Due to the high risk associated with surgical procedures, a variety of minimally invasive therapeutics aimed at tissue repair and regeneration are being developed. While biomaterials delivered via intramyocardial injection have shown promise, there are challenges associated with delivery in acute MI. In contrast, intravascularly injectable biomaterials are a desirable category of therapeutics due to their ability to be delivered immediately post-MI via less invasive methods. In addition to passive diffusion into the infarct, these biomaterials can be designed to target the molecular and cellular characteristics seen in MI pathophysiology, such as cells and proteins present in the ischemic myocardium, to reduce off-target localization. These injectable materials can also be stimuli-responsive through enzymes or chemical imbalances. This review outlines the natural and synthetic biomaterial designs that allow for retention and accumulation within the infarct via intravascular delivery, including intracoronary infusion and intravenous injection.
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Affiliation(s)
- Alexander Chen
- Shu Chien-Gene Lay Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA 92037, USA
| | - Joshua M. Mesfin
- Shu Chien-Gene Lay Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA 92037, USA
| | - Nathan C. Gianneschi
- Department of Chemistry and Biomedical Engineering, International Institute for Nanotechnology, Simpson-Querrey Institute, Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208, USA
| | - Karen L. Christman
- Shu Chien-Gene Lay Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA 92037, USA
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12
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Spang MT, Middleton R, Diaz M, Hunter J, Mesfin J, Banka A, Sullivan H, Wang R, Lazerson TS, Bhatia S, Corbitt J, D'Elia G, Sandoval-Gomez G, Kandell R, Vratsanos MA, Gnanasekaran K, Kato T, Igata S, Luo C, Osborn KG, Gianneschi NC, Eniola-Adefeso O, Cabrales P, Kwon EJ, Contijoch F, Reeves RR, DeMaria AN, Christman KL. Intravascularly infused extracellular matrix as a biomaterial for targeting and treating inflamed tissues. Nat Biomed Eng 2023; 7:94-109. [PMID: 36581694 PMCID: PMC10166066 DOI: 10.1038/s41551-022-00964-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 10/18/2022] [Indexed: 12/31/2022]
Abstract
Decellularized extracellular matrix in the form of patches and locally injected hydrogels has long been used as therapies in animal models of disease. Here we report the safety and feasibility of an intravascularly infused extracellular matrix as a biomaterial for the repair of tissue in animal models of acute myocardial infarction, traumatic brain injury and pulmonary arterial hypertension. The biomaterial consists of decellularized, enzymatically digested and fractionated ventricular myocardium, localizes to injured tissues by binding to leaky microvasculature, and is largely degraded in about 3 d. In rats and pigs with induced acute myocardial infarction followed by intracoronary infusion of the biomaterial, we observed substantially reduced left ventricular volumes and improved wall-motion scores, as well as differential expression of genes associated with tissue repair and inflammation. Delivering pro-healing extracellular matrix by intravascular infusion post injury may provide translational advantages for the healing of inflamed tissues 'from the inside out'.
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Affiliation(s)
- Martin T Spang
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
- Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA
| | - Ryan Middleton
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
- Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA
| | - Miranda Diaz
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
- Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA
| | - Jervaughn Hunter
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
- Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA
| | - Joshua Mesfin
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
- Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA
| | - Alison Banka
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Holly Sullivan
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
- Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA
| | - Raymond Wang
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
- Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA
| | - Tori S Lazerson
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
- Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA
| | - Saumya Bhatia
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
- Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA
| | - James Corbitt
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
- Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA
| | - Gavin D'Elia
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
- Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA
| | - Gerardo Sandoval-Gomez
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
- Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA
| | - Rebecca Kandell
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
- Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA
| | - Maria A Vratsanos
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
| | - Karthikeyan Gnanasekaran
- Department of Chemistry, International Institute for Nanotechnology, Chemistry of Life Processes Institute, Simpson Querrey Institute, Northwestern University, Evanston, IL, USA
| | - Takayuki Kato
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
- Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA
| | - Sachiyo Igata
- Division of Cardiovascular Medicine, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Colin Luo
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
- Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA
| | - Kent G Osborn
- Animal Care Program, University of California San Diego, La Jolla, CA, USA
| | - Nathan C Gianneschi
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
- Department of Chemistry, International Institute for Nanotechnology, Chemistry of Life Processes Institute, Simpson Querrey Institute, Northwestern University, Evanston, IL, USA
- Department of Biomedical Engineering and Department of Pharmacology, Northwestern University, Evanston, IL, USA
| | - Omolola Eniola-Adefeso
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Pedro Cabrales
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
| | - Ester J Kwon
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
- Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA
| | - Francisco Contijoch
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
- Department of Radiology, University of California San Diego, La Jolla, CA, USA
| | - Ryan R Reeves
- Division of Cardiovascular Medicine, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Anthony N DeMaria
- Division of Cardiovascular Medicine, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Karen L Christman
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, La Jolla, CA, USA.
- Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA.
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13
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Sesillo FB, Rajesh V, Wong M, Duran P, Rudell JB, Rundio CP, Baynes BB, Laurent LC, Sacco A, Christman KL, Alperin M. Muscle stem cells and fibro-adipogenic progenitors in female pelvic floor muscle regeneration following birth injury. NPJ Regen Med 2022; 7:72. [PMID: 36526635 PMCID: PMC9758192 DOI: 10.1038/s41536-022-00264-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 11/29/2022] [Indexed: 12/23/2022] Open
Abstract
Pelvic floor muscle (PFM) injury during childbirth is a key risk factor for pelvic floor disorders that affect millions of women worldwide. Muscle stem cells (MuSCs), supported by the fibro-adipogenic progenitors (FAPs) and immune cells, are indispensable for the regeneration of injured appendicular skeletal muscles. However, almost nothing is known about their role in PFM regeneration following birth injury. To elucidate the role of MuSCs, FAPs, and immune infiltrate in this context, we used radiation to perturb cell function and followed PFM recovery in a validated simulated birth injury (SBI) rat model. Non-irradiated and irradiated rats were euthanized at 3,7,10, and 28 days post-SBI (dpi). Twenty-eight dpi, PFM fiber cross-sectional area (CSA) was significantly lower and the extracellular space occupied by immune infiltrate was larger in irradiated relative to nonirradiated injured animals. Following SBI in non-irradiated animals, MuSCs and FAPs expanded significantly at 7 and 3 dpi, respectively; this expansion did not occur in irradiated animals at the same time points. At 7 and 10 dpi, we observed persistent immune response in PFMs subjected to irradiation compared to non-irradiated injured PFMs. CSA of newly regenerated fibers was also significantly smaller following SBI in irradiated compared to non-irradiated injured PFMs. Our results demonstrate that the loss of function and decreased expansion of MuSCs and FAPs after birth injury lead to impaired PFM recovery. These findings form the basis for further studies focused on the identification of novel therapeutic targets to counteract postpartum PFM dysfunction and the associated pelvic floor disorders.
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Affiliation(s)
- Francesca Boscolo Sesillo
- grid.266100.30000 0001 2107 4242Department of Obstetrics, Gynecology, and Reproductive Sciences, Division of Female Pelvic Medicine and Reconstructive Surgery, University of California, San Diego, San Diego, CA 92037 USA ,grid.468218.10000 0004 5913 3393Sanford Consortium for Regenerative Medicine, La Jolla, CA 92037 USA
| | - Varsha Rajesh
- grid.266100.30000 0001 2107 4242Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92161 USA
| | - Michelle Wong
- grid.266100.30000 0001 2107 4242Department of Obstetrics, Gynecology, and Reproductive Sciences, Division of Female Pelvic Medicine and Reconstructive Surgery, University of California, San Diego, San Diego, CA 92037 USA
| | - Pamela Duran
- grid.468218.10000 0004 5913 3393Sanford Consortium for Regenerative Medicine, La Jolla, CA 92037 USA ,grid.266100.30000 0001 2107 4242Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093 USA
| | - John B. Rudell
- grid.266100.30000 0001 2107 4242Department of Obstetrics, Gynecology, and Reproductive Sciences, Division of Female Pelvic Medicine and Reconstructive Surgery, University of California, San Diego, San Diego, CA 92037 USA ,grid.468218.10000 0004 5913 3393Sanford Consortium for Regenerative Medicine, La Jolla, CA 92037 USA
| | - Courtney P. Rundio
- grid.266100.30000 0001 2107 4242Department of Obstetrics, Gynecology, and Reproductive Sciences, Division of Female Pelvic Medicine and Reconstructive Surgery, University of California, San Diego, San Diego, CA 92037 USA ,grid.468218.10000 0004 5913 3393Sanford Consortium for Regenerative Medicine, La Jolla, CA 92037 USA
| | - Brittni B. Baynes
- grid.266100.30000 0001 2107 4242Department of Obstetrics, Gynecology, and Reproductive Sciences, Division of Female Pelvic Medicine and Reconstructive Surgery, University of California, San Diego, San Diego, CA 92037 USA
| | - Louise C. Laurent
- grid.468218.10000 0004 5913 3393Sanford Consortium for Regenerative Medicine, La Jolla, CA 92037 USA ,grid.267102.00000000104485736Department of Obstetrics, Gynecology, and Reproductive Sciences, Division of Maternal-Fetal Medicine, University of San Diego, La Jolla, CA 92037 USA
| | - Alessandra Sacco
- grid.479509.60000 0001 0163 8573Development, Aging and Regeneration Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037 USA
| | - Karen L. Christman
- grid.468218.10000 0004 5913 3393Sanford Consortium for Regenerative Medicine, La Jolla, CA 92037 USA ,grid.266100.30000 0001 2107 4242Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093 USA
| | - Marianna Alperin
- grid.266100.30000 0001 2107 4242Department of Obstetrics, Gynecology, and Reproductive Sciences, Division of Female Pelvic Medicine and Reconstructive Surgery, University of California, San Diego, San Diego, CA 92037 USA ,grid.468218.10000 0004 5913 3393Sanford Consortium for Regenerative Medicine, La Jolla, CA 92037 USA
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14
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Hunter JD, Hancko A, Shakya P, Hill R, Saviola AJ, Hansen KC, Davis ME, Christman KL. Characterization of decellularized left and right ventricular myocardial matrix hydrogels and their effects on cardiac progenitor cells. J Mol Cell Cardiol 2022; 171:45-55. [PMID: 35780862 DOI: 10.1016/j.yjmcc.2022.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 05/15/2022] [Accepted: 06/20/2022] [Indexed: 11/16/2022]
Abstract
Congenital heart defects are the leading cause of right heart failure in pediatric patients. Implantation of c-kit+ cardiac-derived progenitor cells (CPCs) is being clinically evaluated to treat the failing right ventricle (RV), but faces limitations due to reduced transplant cell survival, low engraftment rates, and low retention. These limitations have been exacerbated due to the nature of cell delivery (narrow needles) and the non-optimal recipient microenvironment (reactive oxygen species (ROS)). Extracellular matrix (ECM) hydrogels derived from porcine left ventricular (LV) myocardium have emerged as a potential therapy to treat the ischemic LV and have shown promise as a vehicle to deliver cells to injured myocardium. However, no studies have evaluated the combination of an injectable biomaterial, such as an ECM hydrogel, in combination with cell therapy for treating RV failure. In this study we characterized LV and RV myocardial matrix (MM) hydrogels and performed in vitro evaluations of their potential to enhance CPC delivery, including resistance to forces experienced during injection and exposure to ROS, as well as their potential to enhance angiogenic paracrine signaling. While physical properties of the two hydrogels are similar, the decellularized LV and RV have distinct protein signatures. Both materials were equally effective in protecting CPCs against needle forces and ROS. CPCs encapsulated in either the LV MM or RV MM exhibited similar enhanced potential for angiogenic paracrine signaling when compared to CPCs in collagen. The RV MM without cells, however, likewise improved tube formation, suggesting it should also be evaluated as a potential standalone treatment.
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Affiliation(s)
- Jervaughn D Hunter
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, UC San Diego, USA
| | - Arielle Hancko
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, UC San Diego, USA
| | - Preety Shakya
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Emory University, USA
| | - Ryan Hill
- Department of Biochemistry and Molecular Genetics, Anschutz Medical Campus, University of Colorado, Aurora, CO, USA
| | - Anthony J Saviola
- Department of Biochemistry and Molecular Genetics, Anschutz Medical Campus, University of Colorado, Aurora, CO, USA
| | - Kirk C Hansen
- Department of Biochemistry and Molecular Genetics, Anschutz Medical Campus, University of Colorado, Aurora, CO, USA
| | - Michael E Davis
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Emory University, USA
| | - Karen L Christman
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, UC San Diego, USA.
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15
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Wang RM, Mesfin JM, Hunter J, Cattaneo P, Guimarães-Camboa N, Braden RL, Luo C, Hill RC, Dzieciatkowska M, Hansen KC, Evans S, Christman KL. Myocardial matrix hydrogel acts as a reactive oxygen species scavenger and supports a proliferative microenvironment for cardiomyocytes. Acta Biomater 2022; 152:47-59. [PMID: 36041648 DOI: 10.1016/j.actbio.2022.08.050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 07/16/2021] [Revised: 08/10/2022] [Accepted: 08/23/2022] [Indexed: 11/20/2022]
Abstract
As the native regenerative potential of adult cardiac tissue is limited post-injury, stimulating endogenous repair mechanisms in the mammalian myocardium is a potential goal of regenerative medicine therapeutics. Injection of myocardial matrix hydrogels into the heart post-myocardial infarction (MI) has demonstrated increased cardiac muscle and promotion of pathways associated with cardiac development, suggesting potential promotion of cardiomyocyte turnover. In this study, the myocardial matrix hydrogel was shown to have native capability as an effective reactive oxygen species scavenger and protect against oxidative stress induced cell cycle inhibition in vitro. Encapsulation of cardiomyocytes demonstrated an enhanced turnover in in vitro studies, and in vivo assessments of myocardial matrix hydrogel treatment post-MI showed increased thymidine analog uptake in cardiomyocyte nuclei compared to saline controls. Overall, this study provides evidence that properties of the myocardial matrix material provide a microenvironment mitigating oxidative damage and supportive of cardiomyocytes undergoing DNA synthesis, toward possible DNA repair or cell cycle activation. STATEMENT OF SIGNIFICANCE: Loss of adult mammalian cardiomyocyte turnover is influenced by shifts in oxidative damage, which represents a potential mechanism for improving restoration of cardiac muscle after myocardial infarction (MI). Injection of a myocardial matrix hydrogel into the heart post-MI previously demonstrated increased cardiac muscle and promotion of pathways associated with cardiac development, suggesting potential in promoting proliferation of cardiomyocytes. In this study, the myocardial matrix hydrogel was shown to protect cells from oxidative stress and increase proliferation in vitro. In a rat MI model, greater presence of tissue free thiol content spared from oxidative damage, lesser mitochondrial superoxide content, and increased thymidine analog uptake in cardiomyocytes was found in matrix injected animals compared to saline controls. Overall, this study provides evidence that properties of the myocardial matrix material provide a microenvironment supportive of cardiomyocytes undergoing DNA synthesis, toward possible DNA repair or cell cycle activation.
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Affiliation(s)
- Raymond M Wang
- Department of Bioengineering and Sanford Consortium of Regenerative Medicine, University of California San Diego, 2880 Torrey Pines Scenic Drive, La Jolla, CA 92037, USA
| | - Joshua M Mesfin
- Department of Bioengineering and Sanford Consortium of Regenerative Medicine, University of California San Diego, 2880 Torrey Pines Scenic Drive, La Jolla, CA 92037, USA
| | - Jervaughn Hunter
- Department of Bioengineering and Sanford Consortium of Regenerative Medicine, University of California San Diego, 2880 Torrey Pines Scenic Drive, La Jolla, CA 92037, USA
| | - Paola Cattaneo
- Department of Medicine and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA 92093, USA; Institute of Genetics and Biomedical Research (Milan Unit), National Research Council of Italy, 20189 Rozzano, MI, Italy
| | - Nuno Guimarães-Camboa
- Department of Medicine and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA 92093, USA; Institute of Cardiovascular Regeneration, Goethe University, Frankfurt 60590, Germany
| | - Rebecca L Braden
- Department of Bioengineering and Sanford Consortium of Regenerative Medicine, University of California San Diego, 2880 Torrey Pines Scenic Drive, La Jolla, CA 92037, USA
| | - Colin Luo
- Department of Bioengineering and Sanford Consortium of Regenerative Medicine, University of California San Diego, 2880 Torrey Pines Scenic Drive, La Jolla, CA 92037, USA
| | - Ryan C Hill
- Department of Biochemistry and Molecular Genetics, Anschutz Medical Campus, University of Colorado, Aurora, Colorado, USA
| | - Monika Dzieciatkowska
- Department of Biochemistry and Molecular Genetics, Anschutz Medical Campus, University of Colorado, Aurora, Colorado, USA
| | - Kirk C Hansen
- Department of Biochemistry and Molecular Genetics, Anschutz Medical Campus, University of Colorado, Aurora, Colorado, USA
| | - Sylvia Evans
- Department of Medicine and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA 92093, USA
| | - Karen L Christman
- Department of Bioengineering and Sanford Consortium of Regenerative Medicine, University of California San Diego, 2880 Torrey Pines Scenic Drive, La Jolla, CA 92037, USA..
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16
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Bejleri D, Robeson MJ, Brown ME, Hunter J, Maxwell JT, Streeter BW, Brazhkina O, Park HJ, Christman KL, Davis ME. In vivo evaluation of bioprinted cardiac patches composed of cardiac-specific extracellular matrix and progenitor cells in a model of pediatric heart failure. Biomater Sci 2022; 10:444-456. [PMID: 34878443 PMCID: PMC8772587 DOI: 10.1039/d1bm01539g] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Pediatric patients with congenital heart defects (CHD) often present with heart failure from increased load on the right ventricle (RV) due to both surgical methods to treat CHD and the disease itself. Patients with RV failure often require transplantation, which is limited due to lack of donor availability and rejection. Previous studies investigating the development and in vitro assessment of a bioprinted cardiac patch composed of cardiac extracellular matrix (cECM) and human c-kit + progenitor cells (hCPCs) showed that the construct has promise in treating cardiac dysfunction. The current study investigates in vivo cardiac outcomes of patch implantation in a rat model of RV failure. Patch parameters including cECM-inclusion and hCPC-inclusion are investigated. Assessments include hCPC retention, RV function, and tissue remodeling (vascularization, hypertrophy, and fibrosis). Animal model evaluation shows that both cell-free and neonatal hCPC-laden cECM-gelatin methacrylate (GelMA) patches improve RV function and tissue remodeling compared to other patch groups and controls. Inclusion of cECM is the most influential parameter driving therapeutic improvements, with or without cell inclusion. This study paves the way for clinical translation in treating pediatric heart failure using bioprinted GelMA-cECM and hCPC-GelMA-cECM patches.
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Affiliation(s)
- Donald Bejleri
- Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 1760 Haygood Dr, Atlanta, GA, 30322, USA.
| | - Matthew J Robeson
- Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 1760 Haygood Dr, Atlanta, GA, 30322, USA.
| | - Milton E Brown
- Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 1760 Haygood Dr, Atlanta, GA, 30322, USA.
| | - Jervaughn Hunter
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego, 2880 Torrey Pines Scenic Dr, La Jolla, CA, 92037, USA
| | - Joshua T Maxwell
- Division of Pediatric Cardiology, Department of Pediatrics, Emory University School of Medicine, 2015 Uppergate Dr, Atlanta, GA, 30322, USA
| | - Benjamin W Streeter
- Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 1760 Haygood Dr, Atlanta, GA, 30322, USA.
| | - Olga Brazhkina
- Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 1760 Haygood Dr, Atlanta, GA, 30322, USA.
| | - Hyun-Ji Park
- Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 1760 Haygood Dr, Atlanta, GA, 30322, USA.
| | - Karen L Christman
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego, 2880 Torrey Pines Scenic Dr, La Jolla, CA, 92037, USA
| | - Michael E Davis
- Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 1760 Haygood Dr, Atlanta, GA, 30322, USA.
- Division of Pediatric Cardiology, Department of Pediatrics, Emory University School of Medicine, 2015 Uppergate Dr, Atlanta, GA, 30322, USA
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17
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Hunter JD, Johnson TD, Braden RL, Christman KL. Injectable ECM Scaffolds for Cardiac Repair. Methods Mol Biol 2022; 2485:255-268. [PMID: 35618911 DOI: 10.1007/978-1-0716-2261-2_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Injectable biomaterials have been developed as potential minimally invasive therapies for treating myocardial infarction (MI) and heart failure. Christman et al. first showed that the injection of a biomaterial alone into rat myocardium can improve cardiac function after MI. More recently, hydrogel forms of decellularized extracellular matrix (ECM) materials have shown substantial promise. Here, we present the methods for fabricating an injectable cardiac-specific ECM biomaterial with demonstrated positive outcomes in small and large animal models for cardiac repair as well as initial safety in a Phase I clinical trial. This chapter also covers the methods for the injection of a biomaterial into rat myocardium using a surgical approach through the diaphragm. Although the methods shown here are for injection of an acellular biomaterial, cells or other therapeutics could also be added to the injection for testing other regenerative medicine strategies.
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Affiliation(s)
- Jervaughn D Hunter
- Sanford Consortium for Regenerative Medicine, Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
| | - Todd D Johnson
- Sanford Consortium for Regenerative Medicine, Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
| | - Rebecca L Braden
- Sanford Consortium for Regenerative Medicine, Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
| | - Karen L Christman
- Sanford Consortium for Regenerative Medicine, Department of Bioengineering, University of California San Diego, La Jolla, CA, USA.
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18
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Fujita M, Policastro GM, Burdick A, Lam HT, Ungerleider JL, Braden RL, Huang D, Osborn KG, Omens JH, Madani MM, Christman KL. Preventing post-surgical cardiac adhesions with a catechol-functionalized oxime hydrogel. Nat Commun 2021; 12:3764. [PMID: 34145265 PMCID: PMC8213776 DOI: 10.1038/s41467-021-24104-w] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 06/02/2021] [Indexed: 11/12/2022] Open
Abstract
Post-surgical cardiac adhesions represent a significant problem during routine cardiothoracic procedures. This fibrous tissue can impair heart function and inhibit surgical access in reoperation procedures. Here, we propose a hydrogel barrier composed of oxime crosslinked poly(ethylene glycol) (PEG) with the inclusion of a catechol (Cat) group to improve retention on the heart for pericardial adhesion prevention. This three component system is comprised of aldehyde (Ald), aminooxy (AO), and Cat functionalized PEG mixed to form the final gel (Ald-AO-Cat). Ald-AO-Cat has favorable mechanical properties, degradation kinetics, and minimal swelling, as well as superior tissue retention compared to an initial Ald-AO gel formulation. We show that the material is cytocompatible, resists cell adhesion, and led to a reduction in the severity of adhesions in an in vivo rat model. We further show feasibility in a pilot porcine study. The Ald-AO-Cat hydrogel barrier may therefore serve as a promising solution for preventing post-surgical cardiac adhesions.
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Affiliation(s)
- Masaki Fujita
- Department of Bioengineering, University of California, San Diego, San Diego, CA, USA
- Sanford Consortium for Regenerative Medicine, University of California, San Diego, San Diego, CA, USA
| | - Gina M Policastro
- Department of Bioengineering, University of California, San Diego, San Diego, CA, USA
- Sanford Consortium for Regenerative Medicine, University of California, San Diego, San Diego, CA, USA
| | - Austin Burdick
- Department of Bioengineering, University of California, San Diego, San Diego, CA, USA
- Sanford Consortium for Regenerative Medicine, University of California, San Diego, San Diego, CA, USA
| | - Hillary T Lam
- Department of Bioengineering, University of California, San Diego, San Diego, CA, USA
- Sanford Consortium for Regenerative Medicine, University of California, San Diego, San Diego, CA, USA
| | - Jessica L Ungerleider
- Department of Bioengineering, University of California, San Diego, San Diego, CA, USA
- Sanford Consortium for Regenerative Medicine, University of California, San Diego, San Diego, CA, USA
| | - Rebecca L Braden
- Department of Bioengineering, University of California, San Diego, San Diego, CA, USA
- Sanford Consortium for Regenerative Medicine, University of California, San Diego, San Diego, CA, USA
| | - Diane Huang
- Department of Medicine, University of California, San Diego, San Diego, CA, USA
| | - Kent G Osborn
- Division of Comparative Pathology and Medicine, School of Medicine, University of California, San Diego, San Diego, CA, USA
| | - Jeffrey H Omens
- Department of Bioengineering, University of California, San Diego, San Diego, CA, USA
- Department of Medicine, University of California, San Diego, San Diego, CA, USA
| | - Michael M Madani
- Division of Cardiovascular and Thoracic Surgery, University of California, San Diego, San Diego, CA, USA
| | - Karen L Christman
- Department of Bioengineering, University of California, San Diego, San Diego, CA, USA.
- Sanford Consortium for Regenerative Medicine, University of California, San Diego, San Diego, CA, USA.
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19
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Diaz MD, Tran E, Spang M, Wang R, Gaetani R, Luo CG, Braden R, Hill RC, Hansen KC, DeMaria AN, Christman KL. Injectable Myocardial Matrix Hydrogel Mitigates Negative Left Ventricular Remodeling in a Chronic Myocardial Infarction Model. JACC Basic Transl Sci 2021; 6:350-361. [PMID: 33997521 PMCID: PMC8093531 DOI: 10.1016/j.jacbts.2021.01.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 01/04/2021] [Accepted: 01/04/2021] [Indexed: 12/12/2022]
Abstract
Myocardial matrix hydrogel preserves LV volumes and apical wall thickening in a chronic MI model. Myocardial matrix hydrogel trends toward reduced fibrosis. In vivo differential gene expression analysis shows the matrix modulates cardiac muscle contraction, metabolism, fibrosis, and the inflammatory/immune response in a chronic MI model.
A first-in-man clinical study on a myocardial-derived decellularized extracellular matrix hydrogel suggested the potential for efficacy in chronic myocardial infarction (MI) patients. However, little is understood about the mechanism of action in chronic MI. In this study, the authors investigated the efficacy and mechanism by which the myocardial matrix hydrogel can mitigate negative left ventricular (LV) remodeling in a rat chronic MI model. Assessment of cardiac function via magnetic resonance imaging demonstrated preservation of LV volumes and apical wall thickening. Differential gene expression analyses showed the matrix is able to prevent further negative LV remodeling in the chronic MI model through modulation of the immune response, down-regulation of pathways involved in heart failure progression and fibrosis, and up-regulation of genes important for cardiac muscle contraction.
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Key Words
- CMR, cardiac magnetic resonance
- ECM, extracellular matrix
- EDV, end-diastolic volume
- EF, ejection fraction
- ESV, end-systolic volume
- HF, heart failure
- IHC, immunohistochemistry
- KEGG, Kyoto Encyclopedia of Genes and Genomes
- LV, left ventricular
- MI, myocardial infarction
- MS, mass spectrometry
- QconCAT, quantitative concatamer
- biomaterials
- chronic inflammation
- chronic myocardial infarction
- gene expression
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Affiliation(s)
- Miranda D Diaz
- Department of Bioengineering, University of California, San Diego, La Jolla, California, USA.,Sanford Consortium for Regenerative Medicine, La Jolla, California, USA
| | - Elaine Tran
- Department of Bioengineering, University of California, San Diego, La Jolla, California, USA.,Sanford Consortium for Regenerative Medicine, La Jolla, California, USA
| | - Martin Spang
- Department of Bioengineering, University of California, San Diego, La Jolla, California, USA.,Sanford Consortium for Regenerative Medicine, La Jolla, California, USA
| | - Raymond Wang
- Department of Bioengineering, University of California, San Diego, La Jolla, California, USA.,Sanford Consortium for Regenerative Medicine, La Jolla, California, USA
| | - Roberto Gaetani
- Department of Bioengineering, University of California, San Diego, La Jolla, California, USA.,Sanford Consortium for Regenerative Medicine, La Jolla, California, USA.,Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | - Colin G Luo
- Department of Bioengineering, University of California, San Diego, La Jolla, California, USA.,Sanford Consortium for Regenerative Medicine, La Jolla, California, USA
| | - Rebecca Braden
- Department of Bioengineering, University of California, San Diego, La Jolla, California, USA.,Sanford Consortium for Regenerative Medicine, La Jolla, California, USA
| | - Ryan C Hill
- Department of Biochemistry and Molecular Genetics, Anschutz Medical Campus, University of Colorado, Aurora, Colorado, USA
| | - Kirk C Hansen
- Department of Biochemistry and Molecular Genetics, Anschutz Medical Campus, University of Colorado, Aurora, Colorado, USA
| | - Anthony N DeMaria
- Department of Medicine, University of California, San Diego, La Jolla, California, USA
| | - Karen L Christman
- Department of Bioengineering, University of California, San Diego, La Jolla, California, USA.,Sanford Consortium for Regenerative Medicine, La Jolla, California, USA
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20
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Abstract
Nanoscale therapeutics have promise for the administration of therapeutic small molecules and biologics to the heart following myocardial infarction. Directed delivery to the infarcted region of the heart using minimally invasive routes is critical to this promise. In this review, we will discuss the advances and design considerations for two nanoscale therapeutics engineered to target the infarcted heart, nanoparticles and adeno-associated viruses.
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Affiliation(s)
- Holly L Sullivan
- Department of Bioengineering and Sanford Consortium for Regenerative, Medicine, University of California, San Diego, La Jolla, USA.
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21
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Stevens KR, Masters KS, Imoukhuede PI, Haynes KA, Setton LA, Cosgriff-Hernandez E, Lediju Bell MA, Rangamani P, Sakiyama-Elbert SE, Finley SD, Willits RK, Koppes AN, Chesler NC, Christman KL, Allen JB, Wong JY, El-Samad H, Desai TA, Eniola-Adefeso O. Fund Black scientists. Cell 2021; 184:561-565. [PMID: 33503447 DOI: 10.1016/j.cell.2021.01.011] [Citation(s) in RCA: 78] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Our nationwide network of BME women faculty collectively argue that racial funding disparity by the National Institutes of Health (NIH) remains the most insidious barrier to success of Black faculty in our profession. We thus refocus attention on this critical barrier and suggest solutions on how it can be dismantled.
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Affiliation(s)
- Kelly R Stevens
- Departments of Bioengineering, Laboratory Medicine & Pathology, University of Washington, Seattle, WA, USA.
| | - Kristyn S Masters
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, USA
| | - P I Imoukhuede
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Karmella A Haynes
- Wallace H. Coulter Department of Biomedical Engineering, Emory University, Atlanta, GA, USA
| | - Lori A Setton
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | | | - Muyinatu A Lediju Bell
- Departments of Electrical & Computer Engineering, Biomedical Engineering, and Computer Science, Johns Hopkins University, Baltimore, MD, USA
| | - Padmini Rangamani
- Department of Mechanical and Aerospace Engineering, University of California, San Diego, San Diego, CA, USA
| | | | - Stacey D Finley
- Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, USA
| | - Rebecca K Willits
- Departments of Chemical Engineering and Bioengineering, Northeastern University, Boston, MA, USA
| | - Abigail N Koppes
- Departments of Chemical Engineering and Bioengineering, Northeastern University, Boston, MA, USA
| | - Naomi C Chesler
- Edwards Lifesciences Center for Advanced Cardiovascular Technology and Biomedical Engineering, University of California, Irvine, Irvine, CA, USA
| | - Karen L Christman
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Josephine B Allen
- Department of Materials Science and Engineering, University of Florida, Gainesville, FL, USA
| | - Joyce Y Wong
- Department of Biomedical Engineering and Division of Materials Science and Engineering, Boston University, Boston, MA, USA
| | - Hana El-Samad
- Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA, USA
| | - Tejal A Desai
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA, USA
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22
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Hernandez MJ, Zelus EI, Spang MT, Braden RL, Christman KL. Dose optimization of decellularized skeletal muscle extracellular matrix hydrogels for improving perfusion and subsequent validation in an aged hindlimb ischemia model. Biomater Sci 2020; 8:3511-3521. [PMID: 32432574 PMCID: PMC7375022 DOI: 10.1039/c9bm01963d] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Peripheral artery disease (PAD) affects more than 27 million individuals in North America and Europe, and current treatment strategies mainly aim to restore blood perfusion. However, many patients are ineligible for existing procedures, and these therapies are often ineffective. Previous studies have demonstrated success of an injectable decellularized skeletal muscle extracellular matrix (ECM) hydrogel in a young rat hindlimb ischemia model of PAD, but further pre-clinical studies are necessary prior to clinical translation. In this study, varying concentrations of a skeletal muscle ECM hydrogel were investigated for material properties and in vivo effects on restoring blood perfusion. Rheological measurements indicated an increase in viscosity and mechanical strength with the higher concentrations of the ECM hydrogels. When injecting dye-labelled ECM hydrogels into a healthy rat, differences were also observed for the spreading and degradation rate of the various concentrations. The three concentrations for the ECM hydrogel were then further examined in a young rat hindlimb ischemia model. The efficacy of the optimal ECM hydrogel concentration was then further confirmed in an aged mouse hindlimb ischemia model. These results further validate the use of decellularized skeletal muscle ECM hydrogels for improving blood perfusion in small animal models of PAD.
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Affiliation(s)
- Melissa J Hernandez
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California San Diego, 2880 Torrey Pines Scenic Dr., La Jolla, CA 92037, USA.
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23
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Gaetani R, Aude S, DeMaddalena LL, Strassle H, Dzieciatkowska M, Wortham M, Bender RHF, Nguyen-Ngoc KV, Schmid-Schöenbein GW, George SC, Hughes CCW, Sander M, Hansen KC, Christman KL. Evaluation of Different Decellularization Protocols on the Generation of Pancreas-Derived Hydrogels. Tissue Eng Part C Methods 2020; 24:697-708. [PMID: 30398401 DOI: 10.1089/ten.tec.2018.0180] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [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: 12/11/2022] Open
Abstract
Different approaches have investigated the effects of different extracellular matrices (ECMs) and three-dimensional (3D) culture on islet function, showing encouraging results. Ideally, the proper scaffold should mimic the biochemical composition of the native tissue as it drives numerous signaling pathways involved in tissue homeostasis and functionality. Tissue-derived decellularized biomaterials can preserve the ECM composition of the native tissue making it an ideal scaffold for 3D tissue engineering applications. However, the decellularization process may affect the retention of specific components, and the choice of a proper detergent is fundamental in preserving the native ECM composition. In this study, we evaluated the effect of different decellularization protocols on the mechanical properties and biochemical composition of pancreatic ECM (pECM) hydrogels. Fresh porcine pancreas tissue was harvested, cut into small pieces, rinsed in water, and treated with two different detergents (sodium dodecyl sulfate [SDS] or Triton X-100) for 1 day followed by 3 days in water. Effective decellularization was confirmed by PicoGreen assay, Hoescht, and H&E staining, showing no differences among groups. Use of a protease inhibitor (PI) was also evaluated. Effective decellularization was confirmed by PicoGreen assay and hematoxylin and eosin (H&E) staining, showing no differences among groups. Triton-treated samples were able to form a firm hydrogel under appropriate conditions, while the use of SDS had detrimental effects on the gelation properties of the hydrogels. ECM biochemical composition was characterized both in the fresh porcine pancreas and all decellularized pECM hydrogels by quantitative mass spectrometry analysis. Fibrillar collagen was the major ECM component in all groups, with all generated hydrogels having a higher amount compared with fresh pancreas. This effect was more pronounced in the SDS-treated hydrogels when compared with the Triton groups, showing very little retention of other ECM molecules. Conversely, basement membrane and matricellular proteins were better retained when the tissue was pretreated with a PI and decellularized in Triton X-100, making the hydrogel more similar to the native tissue. In conclusion, we showed that all the protocols evaluated in the study showed effective tissue decellularization, but only when the tissue was pretreated with a PI and decellularized in Triton detergent, the biochemical composition of the hydrogel was closer to the native tissue ECM. Impact Statement The article compares different methodologies for the generation of a pancreas-derived hydrogel for tissue engineering applications. The biochemical characterization of the newly generated hydrogel shows that the material retains all the extracellular molecules of the native tissue and is capable of sustaining functionality of the encapsulated beta-cells.
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Affiliation(s)
- Roberto Gaetani
- Department of Bioengineering, University of California San Diego, La Jolla, California.,Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, California
| | - Soraya Aude
- Department of Bioengineering, University of California San Diego, La Jolla, California.,Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, California
| | - Lea Lara DeMaddalena
- Department of Bioengineering, University of California San Diego, La Jolla, California.,Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, California
| | - Heinz Strassle
- Department of Bioengineering, University of California San Diego, La Jolla, California.,Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, California
| | - Monika Dzieciatkowska
- Department of Biochemistry and Molecular Genetics, University of Colorado, Aurora, Colorado
| | - Matthew Wortham
- Departments of Pediatrics and Cellular and Molecular Medicine, Pediatric Diabetes Research Center, University of California San Diego, La Jolla, California
| | - R Hugh F Bender
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, California
| | - Kim-Vy Nguyen-Ngoc
- Departments of Pediatrics and Cellular and Molecular Medicine, Pediatric Diabetes Research Center, University of California San Diego, La Jolla, California
| | | | - Steven C George
- Department of Biomedical Engineering, University of California, Davis, Davis, California
| | - Christopher C W Hughes
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, California.,Department of Biomedical Engineering, University of California, Irvine, Irvine, California.,Chao Comprehensive Cancer Center, University of California, Irvine, Irvine, California.,Edwards Lifesciences Center for Advanced Cardiovascular Technology, University of California, Irvine, Irvine, California.,Center for Complex Biological Systems, University of California, Irvine, Irvine, California.,Department of Molecular Biology & Biochemistry, University of California, Irvine, Irvine, California
| | - Maike Sander
- Departments of Pediatrics and Cellular and Molecular Medicine, Pediatric Diabetes Research Center, University of California San Diego, La Jolla, California
| | - Kirk C Hansen
- Department of Biochemistry and Molecular Genetics, University of Colorado, Aurora, Colorado
| | - Karen L Christman
- Department of Bioengineering, University of California San Diego, La Jolla, California.,Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, California
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24
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Wang RM, Duran P, Christman KL. Processed Tissues. Biomater Sci 2020. [DOI: 10.1016/b978-0-12-816137-1.00027-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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25
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Hernandez MJ, Yakutis GE, Zelus EI, Hill RC, Dzieciatkowska M, Hansen KC, Christman KL. Manufacturing considerations for producing and assessing decellularized extracellular matrix hydrogels. Methods 2019; 171:20-27. [PMID: 31546012 DOI: 10.1016/j.ymeth.2019.09.015] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 09/17/2019] [Accepted: 09/18/2019] [Indexed: 01/26/2023] Open
Abstract
Although several decellularized extracellular matrix (ECM) sheets or patches have been commercialized for use in the clinic, only one injectable decellularized ECM hydrogel, a decellularized myocardial matrix, has reached clinical trials. Consequently, very little information is available for established manufacturing standards or assessments of these materials. Here we present detailed methodology for investigating three parameters related to manufacturing optimization for a porcine derived skeletal muscle ECM hydrogel - animal-to-animal variability, bioburden reduction, and harvesting conditions. Results from characterization assays, including residual dsDNA content and sulfated glycosaminoglycan content, did not yield noteworthy differences amongst individual animals or following the addition of a bioburden reducing agent. However, the tissue collected under different harvesting conditions contained varying amounts of fat, and the protein compositions of the decellularized products differed, which could ultimately impact subsequent efficacy in vitro or in vivo. As decellularized ECM hydrogels continue to be evaluated for various applications, the differences between laboratory-scale and manufacturing-scale material batches should be thoroughly considered to avoid costly and timely optimization during scale-up.
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Affiliation(s)
- Melissa J Hernandez
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Grace E Yakutis
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Emma I Zelus
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Ryan C Hill
- Department of Biochemistry and Molecular Genetics, School of Medicine, University of Colorado, Aurora, CO, USA
| | - Monika Dzieciatkowska
- Department of Biochemistry and Molecular Genetics, School of Medicine, University of Colorado, Aurora, CO, USA
| | - Kirk C Hansen
- Department of Biochemistry and Molecular Genetics, School of Medicine, University of Colorado, Aurora, CO, USA
| | - Karen L Christman
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, USA.
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26
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Traverse JH, Henry TD, Dib N, Patel AN, Pepine C, Schaer GL, DeQuach JA, Kinsey AM, Chamberlin P, Christman KL. First-in-Man Study of a Cardiac Extracellular Matrix Hydrogel in Early and Late Myocardial Infarction Patients. JACC Basic Transl Sci 2019; 4:659-669. [PMID: 31709316 PMCID: PMC6834965 DOI: 10.1016/j.jacbts.2019.07.012] [Citation(s) in RCA: 124] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 07/26/2019] [Accepted: 07/27/2019] [Indexed: 12/16/2022]
Abstract
A first-in-man clinical trial was completed with VentriGel, an extracellular matrix hydrogel derived from decellularized porcine myocardium, in post–MI patients. Results from the trial support the safety and feasibility of transendocardial injection of VentriGel in post–MI patients with left ventricular dysfunction. Although the study was not designed to evaluate efficacy, there were suggestions of improvements including increases in 6-min walk test distance and decreases in New York Heart Association functional class across the entire cohort of patients. Improvements in left ventricular remodeling were mainly observed in patients who were treated >1-year post–MI as opposed to <1 year. Results from the trial warrant further evaluation in larger randomized, controlled clinical trials.
This study evaluated the safety and feasibility of transendocardial injections of VentriGel, a cardiac extracellular matrix hydrogel, in early and late post–myocardial infarction (MI) patients with left ventricular (LV) dysfunction. VentriGel was delivered in 15 patients with moderate LV dysfunction (25% ≤ LV ejection fraction ≤ 45%) who were between 60 days to 3 years post-MI and were revascularized by percutaneous coronary intervention. The primary endpoints were incidence of adverse events and abnormal clinical laboratory results. This first-in-man study established the safety and feasibility of delivering VentriGel in post-MI patients, thus warranting further evaluation in larger, randomized clinical trials.
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Key Words
- BNP, B-type natriuretic peptide
- CMR, cardiac magnetic resonance
- ECM, extracellular matrix
- EF, ejection fraction
- LV, left ventricular
- LVEDV, left ventricular end-diastolic volume
- LVESV, left ventricular end-systolic volume
- MI, myocardial infarction
- MLWHFQ, Minnesota Living with Heart Failure Questionnaire
- NYHA, New York Heart Association
- biomaterial
- catheter
- heart failure
- injectable
- myocardial infarction
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Affiliation(s)
| | - Timothy D Henry
- The Carl and Edyth Lindner Center for Research and Education at The Christ Hospital, Cincinnati, Ohio
| | - Nabil Dib
- Dignity Health Mercy Gilbert Medical Center, Gilbert, Arizona
| | - Amit N Patel
- Dewitt Daughtry Family Department of Surgery, Division of Cardiothoracic Surgery, University of Miami, Leonard M. Miller School of Medicine, Miami, Florida
| | - Carl Pepine
- University of Florida College of Medicine, Gainesville, Florida
| | - Gary L Schaer
- Division of Cardiology, Rush University Medical Center, Chicago, Illinois
| | | | | | | | - Karen L Christman
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, La Jolla, California
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27
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Affiliation(s)
- Karen L Christman
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, USA.
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28
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Carlini AS, Gaetani R, Braden RL, Luo C, Christman KL, Gianneschi NC. Enzyme-responsive progelator cyclic peptides for minimally invasive delivery to the heart post-myocardial infarction. Nat Commun 2019; 10:1735. [PMID: 30988291 PMCID: PMC6465301 DOI: 10.1038/s41467-019-09587-y] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [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: 07/23/2018] [Accepted: 03/11/2019] [Indexed: 01/08/2023] Open
Abstract
Injectable biopolymer hydrogels have gained attention for use as scaffolds to promote cardiac function and prevent negative left ventricular (LV) remodeling post-myocardial infarction (MI). However, most hydrogels tested in preclinical studies are not candidates for minimally invasive catheter delivery due to excess material viscosity, rapid gelation times, and/or concerns regarding hemocompatibility and potential for embolism. We describe a platform technology for progelator materials formulated as sterically constrained cyclic peptides which flow freely for low resistance injection, and rapidly assemble into hydrogels when linearized by disease-associated enzymes. Their utility in vivo is demonstrated by their ability to flow through a syringe and gel at the site of MI in rat models. Additionally, synthetic functionalization enables these materials to flow through a cardiac injection catheter without clogging, without compromising hemocompatibility or cytotoxicity. These studies set the stage for the development of structurally dynamic biomaterials for therapeutic hydrogel delivery to the MI.
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Affiliation(s)
- Andrea S Carlini
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, CA, 92093, USA
- Department of Chemistry, Department of Materials Science & Engineering, Department of Biomedical Engineering, Simpson Querrey Institute for BioNanotechnology, International Institute for Nanotechnology, and Chemistry of Life Processes Institute, Northwestern University, Evanston, IL, 60208, USA
| | - Roberto Gaetani
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Rebecca L Braden
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Colin Luo
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Karen L Christman
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, 92093, USA.
| | - Nathan C Gianneschi
- Department of Chemistry, Department of Materials Science & Engineering, Department of Biomedical Engineering, Simpson Querrey Institute for BioNanotechnology, International Institute for Nanotechnology, and Chemistry of Life Processes Institute, Northwestern University, Evanston, IL, 60208, USA.
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Duran P, Ward S, Christman KL, Alperin M. Mechanical impact of parturition-related strains on rat pelvic striated sphincters. Neurourol Urodyn 2019; 38:912-919. [PMID: 30779377 PMCID: PMC6431564 DOI: 10.1002/nau.23946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 11/27/2018] [Revised: 01/11/2019] [Accepted: 01/18/2019] [Indexed: 11/08/2022]
Abstract
AIMS To define the operational resting sarcomere length (Ls ) of the female rat external urethral sphincter (EUS) and external anal sphincter (EAS) and to determine the mechanism of parturition-related injury of EUS and EAS using a simulated birth injury (SBI) vaginal distention model. METHODS EUS and EAS of 3-month-old Sprague-Dawley control and injured rats were fixed in situ, harvested, and microdissected for Ls measurements and assessment of ultrastructure. EUS and EAS function was determined at baseline, and immediately and 4 weeks after SBI, using leak point pressure (LPP) and anorectal manometry (ARM), respectively. Operational L s was compared to species-specific optimal L s using one sample Student's t test. Data (mean ± SD) were compared between groups and time points using repeated measures one-way analysis of variance, followed by Tukey's post hoc pairwise comparisons, with significance set to 0.05. RESULTS The operational resting Ls of both sphincters (EUS: 2.09 ± 0.07 µm, EAS: 2.02 ± 0.03 µm) was significantly shorter than optimal rat Ls of 2.4 µm. Strains imposed on EUS and EAS during SBI resulted in significant sarcomere elongation and disruption, compared with the controls (EUS: 3.09 ± 0.11 µm, EAS: 3.37 ± 0.09 µm). Paralleling structural changes, LPP and ARM measures were significantly lower immediately (LPP: 21.5 ± 1.0 cmH2 O, ARM: 5.1 ± 2.31 cmH2 O) and 4 weeks (LPP: 27.7 ± 1.3cmH2 O, ARM: 2.5 ± 1.0 cmH2 O) after SBI relative to the baseline (LPP: 43.4 ± 8.5 cmH2 O, ARM: 8.2 ± 2.0 cmH2 O); P < 0.05. CONCLUSIONS Analogous to humans, the short resting Ls of rat EUS and EAS favors their sphincteric function. The insult experienced by these muscles during parturition leads to sarcomere hyperelongation, myofibrillar disruption, and dysfunction of the sphincters long-term.
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Affiliation(s)
- Pamela Duran
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA
| | - Samuel Ward
- Department of Orthopaedic Surgery, University of California San Diego, La Jolla, CA
- Department of Radiology, University of California San Diego, La Jolla, CA
| | - Karen L. Christman
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA
| | - Marianna Alperin
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Division of Female Pelvic Medicine and Reconstructive Surgery, University of California San Diego, La Jolla, CA
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30
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Sheth VR, Duran P, Wong J, Shah S, Du J, Christman KL, Chang EY, Alperin M. Multimodal imaging assessment and histologic correlation of the female rat pelvic floor muscles' anatomy. J Anat 2019; 234:543-550. [PMID: 30740685 DOI: 10.1111/joa.12943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/14/2018] [Indexed: 10/27/2022] Open
Abstract
Pelvic floor disorders negatively impact millions of women worldwide. Although there is a strong epidemiological association with childbirth, the mechanisms leading to the dysfunction of the integral constituents of the female pelvic floor, including pelvic floor skeletal muscles, are not well understood. This is in part due to the constraints associated with directly probing these muscles, which are located deep in the pelvis. Thus, experimental models and non-invasive techniques are essential for advancing knowledge of various phenotypes of pelvic floor muscle injury and pathogenesis of muscle dysfunction, as well as developing minimally invasive approaches for the delivery of novel therapeutics. The most widely used animal model for pelvic floor disorders is the rat. However, the radiological anatomy of rat pelvic floor muscles has not been described. To remedy this gap, the current study provides the first detailed description of the female rat pelvic floor muscles' radiological appearance on MR and ultrasound images, validated by correlation with gross anatomy and histology. We also demonstrate that ultrasound guidance can be used to target rat pelvic floor muscles for possible interventional therapies.
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Affiliation(s)
- Vipul R Sheth
- Department of Radiology, University of California San Diego, La Jolla, CA, USA
| | - Pamela Duran
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA, USA
| | - Jonathan Wong
- Department of Radiology, University of California San Diego, La Jolla, CA, USA.,Radiology Service, VA San Diego Healthcare System, San Diego, CA, USA
| | - Sameer Shah
- Department of Orthopedic Surgery, University of California San Diego, La Jolla, CA, USA
| | - Jiang Du
- Department of Radiology, University of California San Diego, La Jolla, CA, USA
| | - Karen L Christman
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA, USA
| | - Eric Y Chang
- Department of Radiology, University of California San Diego, La Jolla, CA, USA.,Radiology Service, VA San Diego Healthcare System, San Diego, CA, USA
| | - Marianna Alperin
- Division of Female Pelvic Medicine and Reconstructive Surgery, Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Diego, La Jolla, CA, USA
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31
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Bejleri D, Streeter BW, Nachlas ALY, Brown ME, Gaetani R, Christman KL, Davis ME. A Bioprinted Cardiac Patch Composed of Cardiac-Specific Extracellular Matrix and Progenitor Cells for Heart Repair. Adv Healthc Mater 2018; 7:e1800672. [PMID: 30379414 PMCID: PMC6521871 DOI: 10.1002/adhm.201800672] [Citation(s) in RCA: 147] [Impact Index Per Article: 24.5] [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: 06/11/2018] [Revised: 10/16/2018] [Indexed: 12/12/2022]
Abstract
Congenital heart defects are present in 8 of 1000 newborns and palliative surgical therapy has increased survival. Despite improved outcomes, many children develop reduced cardiac function and heart failure requiring transplantation. Human cardiac progenitor cell (hCPC) therapy has potential to repair the pediatric myocardium through release of reparative factors, but therapy suffers from limited hCPC retention and functionality. Decellularized cardiac extracellular matrix hydrogel (cECM) improves heart function in animals, and human trials are ongoing. In the present study, a 3D-bioprinted patch containing cECM for delivery of pediatric hCPCs is developed. Cardiac patches are printed with bioinks composed of cECM, hCPCs, and gelatin methacrylate (GelMA). GelMA-cECM bioinks print uniformly with a homogeneous distribution of cECM and hCPCs. hCPCs maintain >75% viability and incorporation of cECM within patches results in a 30-fold increase in cardiogenic gene expression of hCPCs compared to hCPCs grown in pure GelMA patches. Conditioned media from GelMA-cECM patches show increased angiogenic potential (>2-fold) over GelMA alone, as seen by improved endothelial cell tube formation. Finally, patches are retained on rat hearts and show vascularization over 14 d in vivo. This work shows the successful bioprinting and implementation of cECM-hCPC patches for potential use in repairing damaged myocardium.
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Affiliation(s)
- Donald Bejleri
- Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 1760 Haygood Dr., Atlanta, GA, 30322, USA
| | - Benjamin W Streeter
- Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 1760 Haygood Dr., Atlanta, GA, 30322, USA
| | - Aline L Y Nachlas
- Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 1760 Haygood Dr., Atlanta, GA, 30322, USA
| | - Milton E Brown
- Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 1760 Haygood Dr., Atlanta, GA, 30322, USA
| | - Roberto Gaetani
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego, 2880 Torrey Pines Scenic Dr., La Jolla, CA, 92037, USA
| | - Karen L Christman
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego, 2880 Torrey Pines Scenic Dr., La Jolla, CA, 92037, USA
| | - Michael E Davis
- Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 1760 Haygood Dr., Atlanta, GA, 30322, USA
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32
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Hernandez MJ, Gaetani R, Pieters VM, Ng NW, Chang AE, Martin TR, van Ingen E, Mol EA, Sluijter JPG, Christman KL. Decellularized Extracellular Matrix Hydrogels as a Delivery Platform for MicroRNA and Extracellular Vesicle Therapeutics. Adv Ther (Weinh) 2018; 1. [PMID: 31544132 DOI: 10.1002/adtp.201800032] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [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: 12/11/2022]
Abstract
In the last decade, the use of microRNA (miRNA) and extracellular vesicle (EV) therapies has emerged as an alternative approach to mitigate the negative effects of several disease pathologies ranging from cancer to tissue and organ regeneration; however, delivery approaches towards target tissues have not been optimized. To alleviate these challenges, including rapid diffusion upon injection and susceptibility to degradation, porcine-derived decellularized extracellular matrix (ECM) hydrogels are examined as a potential delivery platform for miRNA and EV therapeutics. The incorporation of EVs and miRNA antagonists, including anti-miR and antago-miR, in ECM hydrogels results in a prolonged release as compared to the biologic agents alone. In addition, individual in vitro assessments confirm the bioactivity of the therapeutics upon release from the ECM hydrogels. This work demonstrates the feasibility of encapsulating miRNA and EV therapeutics in ECM hydrogels to enhance delivery and potentially efficacy in later in vivo applications.
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Affiliation(s)
- Melissa J Hernandez
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Roberto Gaetani
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Vera M Pieters
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Nathan W Ng
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Audrey E Chang
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Taylor R Martin
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Eva van Ingen
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Emma A Mol
- Department of Cardiology, Experimental Cardiology Laboratory, University Medical Center Utrecht, Utrecht, 3584CX, NL
| | - Joost P G Sluijter
- Department of Cardiology, Experimental Cardiology Laboratory, UMC Utrecht Regenerative Medicine Center, University Medical Center Utrecht, Utrecht, 3584CX, NL
| | - Karen L Christman
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, 92093, USA
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33
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Spang MT, Christman KL. Extracellular matrix hydrogel therapies: In vivo applications and development. Acta Biomater 2018; 68:1-14. [PMID: 29274480 DOI: 10.1016/j.actbio.2017.12.019] [Citation(s) in RCA: 172] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 11/09/2017] [Accepted: 12/15/2017] [Indexed: 12/12/2022]
Abstract
Decellularized extracellular matrix (ECM) has been widely used for tissue engineering applications and is becoming increasingly versatile as it can take many forms, including patches, powders, and hydrogels. Following additional processing, decellularized ECM can form an inducible hydrogel that can be injected, providing for new minimally-invasive procedure opportunities. ECM hydrogels have been derived from numerous tissue sources and applied to treat many disease models, such as ischemic injuries and organ regeneration or replacement. This review will focus on in vivo applications of ECM hydrogels and functional outcomes in disease models, as well as discuss considerations for clinical translation. STATEMENT OF SIGNIFICANCE Extracellular matrix (ECM) hydrogel therapies are being developed to treat diseased or damaged tissues and organs throughout the body. Many ECM hydrogels are progressing from in vitro models to in vivo biocompatibility studies and functional models. There is significant potential for clinical translation of these therapies since one ECM hydrogel therapy is already in a Phase 1 clinical trial.
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Abstract
The targeted delivery of enzyme-responsive nanoparticles to specific tissues can be a valuable, minimally invasive approach for imaging or drug delivery applications. In this study, we show for the first time enzyme-directed assembly of intravenously (IV) delivered nanoparticles in ischemic skeletal muscle, which has applications for drug delivery to damaged muscle of the type prevalent in peripheral artery disease (PAD). Specifically, micellar nanoparticles are cleavable by matrix metalloproteinases (MMPs), causing them to undergo a morphological switch and thus aggregate in tissues where these enzymes are upregulated, like ischemic muscle. Here, we demonstrated noninvasive in vivo imaging of these IV-injected nanoparticles through near-infrared dye labeling and in vivo imaging (IVIS) particle tracking in a rat hindlimb ischemia model. Polymer peptide amphiphilic nanoparticles were synthesized and optimized for both MMP cleavage efficiency and near-IR fluorescence. Nanoparticles were injected 4 days after unilateral hindlimb ischemia and were monitored over 28 days using IVIS imaging. Nanoparticles targeted to ischemic muscle over healthy muscle, and ex vivo biodistribution analysis at 7 and 28 days post-injection confirmed targeting to the ischemic muscle as well as off target accumulation in the liver and spleen. Ex vivo histology confirmed particle localization in ischemic but not healthy muscle. Altering the surface charge of the nanoparticles through addition of zwitterionic dye species resulted in improved targeting to the ischemic muscle. To our knowledge, this is the first study to demonstrate the targeted delivery and long term retention of nanoparticles using an enzyme-directed morphology switch. This has implications for noninvasive drug delivery vehicles for treating ischemic muscle, as no minimally invasive, non-surgical options currently exist.
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Affiliation(s)
- J L Ungerleider
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, USA 92037
| | - J K Kammeyer
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA 92093
| | - R L Braden
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, USA 92037
| | - K L Christman
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, USA 92037
| | - N C Gianneschi
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA 92093
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35
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Rao N, Agmon G, Tierney MT, Ungerleider JL, Braden RL, Sacco A, Christman KL. Engineering an Injectable Muscle-Specific Microenvironment for Improved Cell Delivery Using a Nanofibrous Extracellular Matrix Hydrogel. ACS Nano 2017; 11:3851-3859. [PMID: 28323411 PMCID: PMC5576867 DOI: 10.1021/acsnano.7b00093] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Injection of skeletal muscle progenitors has the potential to be a minimally invasive treatment for a number of diseases that negatively affect vasculature and skeletal muscle, including peripheral artery disease. However, success with this approach has been limited because of poor transplant cell survival. This is primarily attributed to cell death due to extensional flow through the needle, the harsh ischemic environment of the host tissue, a deleterious immune cell response, and a lack of biophysical cues supporting exogenous cell viability. We show that engineering a muscle-specific microenvironment, using a nanofibrous decellularized skeletal muscle extracellular matrix hydrogel and skeletal muscle fibroblasts, improves myoblast viability and maturation in vitro. In vivo, this translates to improved cell survival and engraftment and increased perfusion as a result of increased vascularization. Our results indicate that a combinatorial delivery system, which more fully recapitulates the tissue microenvironment, can improve cell delivery to skeletal muscle.
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Affiliation(s)
- Nikhil Rao
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, USA, 92037
| | - Gillie Agmon
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, USA, 92037
| | - Matthew T. Tierney
- Graduate School of Biomedical Sciences, Sanford-Burnham-Prebys Medical Discovery Institute, La Jolla, CA, USA, 92037
| | - Jessica L. Ungerleider
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, USA, 92037
| | - Rebecca L. Braden
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, USA, 92037
| | - Alessandra Sacco
- Graduate School of Biomedical Sciences, Sanford-Burnham-Prebys Medical Discovery Institute, La Jolla, CA, USA, 92037
- Development, Aging and Regeneration Program, Sanford-Burnham-Prebys Medical Discovery Institute, La Jolla, CA, USA, 92037
| | - Karen L. Christman
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA, USA, 92037
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36
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Hernandez MJ, Christman KL. Designing Acellular Injectable Biomaterial Therapeutics for Treating Myocardial Infarction and Peripheral Artery Disease. JACC Basic Transl Sci 2017; 2:212-226. [PMID: 29057375 PMCID: PMC5646282 DOI: 10.1016/j.jacbts.2016.11.008] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2016] [Revised: 11/22/2016] [Accepted: 11/23/2016] [Indexed: 02/07/2023]
Abstract
As the number of global deaths attributed to cardiovascular disease continues to rise, viable treatments for cardiovascular events such as myocardial infarction (MI) or conditions like peripheral artery disease (PAD) are critical. Recent studies investigating injectable biomaterials have shown promise in promoting tissue regeneration and functional improvement, and in some cases, incorporating other therapeutics further augments the beneficial effects of these biomaterials. In this review, we aim to emphasize the advantages of acellular injectable biomaterial-based therapies, specifically material-alone approaches or delivery of acellular biologics, in regards to manufacturability and the capacity of these biomaterials to regenerate or repair diseased tissue. We will focus on design parameters and mechanisms that maximize therapeutic efficacy, particularly, improved functional perfusion and neovascularization regarding PAD and improved cardiac function and reduced negative left ventricular (LV) remodeling post-MI. We will then discuss the rationale and challenges of designing new injectable biomaterial-based therapies for the clinic.
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Affiliation(s)
| | - Karen L. Christman
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, California
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37
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Abstract
Cardiovascular disease, including myocardial infarction (MI) and peripheral artery disease (PAD), afflicts millions of people in Unites States. Current therapies are insufficient to restore blood flow and repair the injured heart or skeletal muscle, respectively, which is subjected to ischemic damage following vessel occlusion. Micro- and nano-particles are being designed as delivery vehicles for growth factors, enzymes and/or small molecules to provide a sustained therapeutic stimulus at the injured tissue. Depending on the formulation, the particles can be injected directly into the heart or skeletal muscle, or accumulate at the site of injury following an intravenous injection. In this article we review existing particle based therapies for treating MI and PAD.
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Affiliation(s)
- S Suarez
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, California, United States
| | - A Almutairi
- Skaggs School of Pharmacy and Pharmaceutical Sciences and KACST UCSD Center of Excellence in Nanomedicine, University of California, San Diego, La Jolla, California, United States
| | - K L Christman
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, California, United States
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38
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Wassenaar JW, Gaetani R, Garcia JJ, Braden RL, Luo CG, Huang D, DeMaria AN, Omens JH, Christman KL. Evidence for Mechanisms Underlying the Functional Benefits of a Myocardial Matrix Hydrogel for Post-MI Treatment. J Am Coll Cardiol 2016; 67:1074-1086. [PMID: 26940929 DOI: 10.1016/j.jacc.2015.12.035] [Citation(s) in RCA: 96] [Impact Index Per Article: 12.0] [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] [Received: 11/11/2015] [Accepted: 12/14/2015] [Indexed: 10/22/2022]
Abstract
BACKGROUND There is increasing need for better therapies to prevent the development of heart failure after myocardial infarction (MI). An injectable hydrogel derived from decellularized porcine ventricular myocardium has been shown to halt the post-infarction progression of negative left ventricular remodeling and decline in cardiac function in both small and large animal models. OBJECTIVES This study sought to elucidate the tissue-level mechanisms underlying the therapeutic benefits of myocardial matrix injection. METHODS Myocardial matrix or saline was injected into infarcted myocardium 1 week after ischemia-reperfusion in Sprague-Dawley rats. Cardiac function was evaluated by magnetic resonance imaging and hemodynamic measurements at 5 weeks after injection. Whole transcriptome microarrays were performed on RNA isolated from the infarct at 3 days and 1 week after injection. Quantitative polymerase chain reaction and histologic quantification confirmed expression of key genes and their activation in altered pathways. RESULTS Principal component analysis of the transcriptomes showed that samples collected from myocardial matrix-injected infarcts are distinct and cluster separately from saline-injected control subjects. Pathway analysis indicated that these differences are due to changes in several tissue processes that may contribute to improved cardiac healing after MI. Matrix-injected infarcted myocardium exhibits an altered inflammatory response, reduced cardiomyocyte apoptosis, enhanced infarct neovascularization, diminished cardiac hypertrophy and fibrosis, altered metabolic enzyme expression, increased cardiac transcription factor expression, and progenitor cell recruitment, along with improvements in global cardiac function and hemodynamics. CONCLUSIONS These results indicate that the myocardial matrix alters several key pathways after MI creating a pro-regenerative environment, further demonstrating its promise as a potential post-MI therapy.
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Affiliation(s)
- Jean W Wassenaar
- Department of Bioengineering, University of California, San Diego; Sanford Consortium for Regenerative Medicine
| | - Roberto Gaetani
- Department of Bioengineering, University of California, San Diego; Sanford Consortium for Regenerative Medicine
| | - Julian J Garcia
- Department of Bioengineering, University of California, San Diego; Sanford Consortium for Regenerative Medicine
| | - Rebecca L Braden
- Department of Bioengineering, University of California, San Diego; Sanford Consortium for Regenerative Medicine
| | - Colin G Luo
- Department of Medicine, University of California, San Diego, La Jolla, California
| | - Diane Huang
- Department of Medicine, University of California, San Diego, La Jolla, California
| | - Anthony N DeMaria
- Department of Medicine, University of California, San Diego, La Jolla, California
| | - Jeffrey H Omens
- Department of Bioengineering, University of California, San Diego; Department of Medicine, University of California, San Diego, La Jolla, California
| | - Karen L Christman
- Department of Bioengineering, University of California, San Diego; Sanford Consortium for Regenerative Medicine.
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Abstract
Decellularized tissues have become a common regenerative medicine platform with multiple materials being researched in academic laboratories, tested in animal studies, and used clinically. Ideally, when a tissue is decellularized the native cell niche is maintained with many of the structural and biochemical cues that naturally interact with the cells of that particular tissue. This makes decellularized tissue materials an excellent platform for providing cells with the signals needed to initiate and maintain differentiation into tissue-specific lineages. The extracellular matrix (ECM) that remains after the decellularization process contains the components of a tissue specific microenvironment that is not possible to create synthetically. The ECM of each tissue has a different composition and structure and therefore has unique properties and potential for affecting cell behavior. This review describes the common methods for preparing decellularized tissue materials and the effects that decellularized materials from different tissues have on cell phenotype.
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40
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Abstract
Extracellular matrix (ECM) derived hydrogels are increasingly used as scaffolds to stimulate endogenous repair. However, few studies have examined how altering the degradation rates of these materials affect cellular interaction in vivo. This study sought to examine how crosslinking or matrix metalloproteinase (MMP) inhibition by doxycycline could be employed to modulate the degradation rate of an injectable hydrogel derived from decellularized porcine ventricular myocardium. While both approaches were effective in reducing degradation in vitro, only doxycycline significantly prolonged hydrogel degradation in vivo without affecting material biocompatibility. In addition, unlike crosslinking, incorporation of doxycycline into the hydrogel did not affect mechanical properties. Lastly, the results of this study highlighted the need for development of novel crosslinkers for in situ modification of injectable ECM-derived hydrogels, as none of the crosslinking agents investigated in this study were both biocompatible and effective.
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Affiliation(s)
- Jean W. Wassenaar
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego
| | - Rebecca L. Braden
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego
| | - Kent G. Osborn
- Office of Animal Research, University of California, San Diego
| | - Karen L. Christman
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego
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41
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Wang RM, Christman KL. Decellularized myocardial matrix hydrogels: In basic research and preclinical studies. Adv Drug Deliv Rev 2016; 96:77-82. [PMID: 26056717 DOI: 10.1016/j.addr.2015.06.002] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 05/19/2015] [Accepted: 06/02/2015] [Indexed: 01/09/2023]
Abstract
A variety of decellularized materials have been developed that have demonstrated potential for treating cardiovascular diseases and improving our understanding of cardiac development. Of these biomaterials, decellularized myocardial matrix hydrogels have shown great promise for creating cellular microenvironments representative of the native cardiac tissue and treating the heart after a myocardial infarction. Decellularized myocardial matrix hydrogels derived from porcine cardiac tissue form a nanofibrous hydrogel once thermally induced at physiological temperatures. Use of isolated cardiac extracellular matrix in 2D and 3D in vitro platforms has demonstrated the capability to provide tissue specific cues for cardiac cell growth and differentiation. Testing of the myocardial matrix hydrogel as a therapy after myocardial infarction in both small and large animal models has demonstrated improved left ventricular function, increased cardiac muscle, and cellular recruitment into the treated infarct. Based on these results, steps are currently being taken to translate these hydrogels into a clinically used injectable biomaterial therapy. In this review, we will focus on the basic science and preclinical studies that have accelerated the development of decellularized myocardial matrix hydrogels into an emerging novel therapy for treating the heart after a myocardial infarction.
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42
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Ungerleider JL, Johnson TD, Hernandez MJ, Elhag DI, Braden RL, Dzieciatkowska M, Osborn KG, Hansen KC, Mahmud E, Christman KL. Extracellular Matrix Hydrogel Promotes Tissue Remodeling, Arteriogenesis, and Perfusion in a Rat Hindlimb Ischemia Model. JACC Basic Transl Sci 2016; 1:32-44. [PMID: 27104218 PMCID: PMC4834896 DOI: 10.1016/j.jacbts.2016.01.009] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Although surgical and endovascular revascularization can be performed in peripheral arterial disease (PAD), 40% of patients with critical limb ischemia do not have a revascularization option. This study examines the efficacy and mechanisms of action of acellular extracellular matrix-based hydrogels as a potential novel therapy for treating PAD. We tested the efficacy of using a tissue-specific injectable hydrogel derived from decellularized porcine skeletal muscle (SKM) and compared this to a new human umbilical cord-derived matrix (hUC) hydrogel, which could have greater potential for tissue regeneration because of the younger age of the tissue source. In a rodent hindlimb ischemia model, both hydrogels were injected 1-week post-surgery and perfusion was regularly monitored with laser speckle contrast analysis to 35 days post-injection. There were significant improvements in hindlimb tissue perfusion and perfusion kinetics with both biomaterials. Histologic analysis indicated that the injected hydrogels were biocompatible, and resulted in arteriogenesis, rather than angiogenesis, as well as improved recruitment of skeletal muscle progenitors. Skeletal muscle fiber morphology analysis indicated that the muscle treated with the tissue-specific SKM hydrogel more closely matched healthy tissue morphology. Whole transcriptome analysis indicated that the SKM hydrogel caused a shift in the inflammatory response, decreased cell death, and increased blood vessel and muscle development. These results show the efficacy of an injectable ECM hydrogel alone as a potential therapy for treating patients with PAD. Our results indicate that the SKM hydrogel improved functional outcomes through stimulation of arteriogenesis and muscle progenitor cell recruitment. Although surgical and endovascular revascularization can be performed in patients with peripheral arterial disease (PAD), 40% of patients with critical limb ischemia do not have a revascularization option. The efficacy of an injectable tissue-specific skeletal muscle extracellular matrix (ECM) hydrogel and a human umbilical cord-derived ECM hydrogel were examined in a rodent hindlimb ischemia model. Although both biomaterials increased tissue perfusion 35 days post-injection, likely through arteriogenesis, the skeletal muscle ECM hydrogel more closely matched healthy tissue morphology. Transcriptomic analysis indicates the skeletal muscle ECM hydrogel shifted the inflammatory response, decreased necrosis/apoptosis, and increased blood vessel and muscle development.
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Affiliation(s)
- Jessica L Ungerleider
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA, USA
| | - Todd D Johnson
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA, USA
| | - Melissa J Hernandez
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA, USA
| | - Dean I Elhag
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA, USA
| | - Rebecca L Braden
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA, USA
| | - Monika Dzieciatkowska
- Department of Biochemistry and Molecular Genetics, School of Medicine, University of Colorado, Aurora, CA, USA
| | - Kent G Osborn
- Animal Care Program, University of California San Diego, La Jolla, CA, USA
| | - Kirk C Hansen
- Department of Biochemistry and Molecular Genetics, School of Medicine, University of Colorado, Aurora, CA, USA
| | - Ehtisham Mahmud
- Division of Cardiovascular Medicine, Sulpizio Cardiovascular Center, University of California San Diego, La Jolla, CA, USA
| | - Karen L Christman
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA, USA
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Suarez SL, Muñoz A, Mitchell A, Braden RL, Luo C, Cochran JR, Almutairi A, Christman KL. Degradable acetalated dextran microparticles for tunable release of an engineered hepatocyte growth factor fragment. ACS Biomater Sci Eng 2015; 2:197-204. [PMID: 29333489 DOI: 10.1021/acsbiomaterials.5b00335] [Citation(s) in RCA: 22] [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] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Injectable biomaterials are promising as new therapies to treat myocardial infarction (MI). One useful property of biomaterials is the ability to protect and sustain release of therapeutic payloads. In order to create a platform for optimizing the release rate of cardioprotective molecules we utilized the tunable degradation of acetalated dextran (AcDex). We created microparticles with three distinct degradation profiles and showed that the consequent protein release profiles could be modulated within the infarcted heart. This enabled us to determine how delivery rate impacted the efficacy of a model therapeutic, an engineered hepatocyte growth factor fragment (HGF-f). Our results showed that the cardioprotective efficacy of HGF-f was optimal when delivered over three days post-intramyocardial injection, yielding the largest arterioles, fewest apoptotic cardiomyocytes bordering the infarct and the smallest infarcts compared to empty particle treatment four weeks after injection. This work demonstrates the potential of using AcDex particles as a delivery platform to optimize the time frame for delivering therapeutic proteins to the heart.
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Affiliation(s)
- Sophia L Suarez
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA.,Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA 92037, USA.,Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California at San Diego, La Jolla, California 92093, USA
| | - Adam Muñoz
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA.,Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA 92037, USA
| | - Aaron Mitchell
- Department of Bioengineering, The Stanford Cardiovascular Institute, Stanford University, Stanford, CA, USA
| | - Rebecca L Braden
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA.,Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA 92037, USA
| | - Colin Luo
- Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Jennifer R Cochran
- Department of Chemical Engineering, The Stanford Cardiovascular Institute, Stanford University, Stanford, CA, USA.,Department of Bioengineering, The Stanford Cardiovascular Institute, Stanford University, Stanford, CA, USA
| | - Adah Almutairi
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California at San Diego, La Jolla, California 92093, USA
| | - Karen L Christman
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA.,Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA 92037, USA
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Gaetani R, Yin C, Srikumar N, Braden R, Doevendans PA, Sluijter JPG, Christman KL. Cardiac-Derived Extracellular Matrix Enhances Cardiogenic Properties of Human Cardiac Progenitor Cells. Cell Transplant 2015; 25:1653-1663. [PMID: 26572770 DOI: 10.3727/096368915x689794] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The use of biomaterials has been demonstrated as a viable strategy to promote cell survival and cardiac repair. However, limitations on combinational cell-biomaterial therapies exist, as cellular behavior is influenced by the microenvironment and physical characteristics of the material. Among the different scaffolds employed for cardiac tissue engineering, a myocardial matrix hydrogel has been shown to promote cardiogenesis in murine cardiac progenitor cells (mCPCs) in vitro. In this study, we investigated the influence of the hydrogel on Sca-1-like human fetal and adult CPCs (fCPCs and aCPCs) when encapsulated in three-dimensional (3D) material in vitro. fCPCs encapsulated in the myocardial matrix showed an increase in the gene expression level of cardiac markers GATA-4 and MLC2v and the vascular marker vascular endothelial growth factor receptor 2 (VEGFR2) after 4 days in culture, and a significant increase in GATA-4 up to 1 week. Increased gene expression levels of Nkx2.5, MEF2c, VEGFR2, and CD31 were also observed when aCPCs were cultured in the matrix compared to collagen. Cell survival was sustained in both hydrogels up to 1 week in culture with the myocardial matrix capable of enhancing the expression of the proliferation marker Ki-67 after 4 days in culture. When encapsulated CPCs were treated with H2O2, an improved survival of the cells cultured in the myocardial matrix was observed. Finally, we evaluated the use of the myocardial matrix as hydrogel for in vivo cell transplantation and demonstrated that the gelation properties of the hydrogel are not influenced by the cells. In summary, we showed that the myocardial matrix hydrogel promotes human CPC cardiogenic potential, proliferation, and survival and is a favorable hydrogel for 3D in vitro culture. Furthermore, we demonstrated the in vivo applicability of the matrix as a potential vehicle for cell transplantation.
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Affiliation(s)
- Roberto Gaetani
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, CA, USA
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Nguyen MM, Carlini AS, Chien MP, Sonnenberg S, Luo C, Braden RL, Osborn KG, Li Y, Gianneschi NC, Christman KL. Enzyme-Responsive Nanoparticles for Targeted Accumulation and Prolonged Retention in Heart Tissue after Myocardial Infarction. Adv Mater 2015; 27:5547-52. [PMID: 26305446 PMCID: PMC4699559 DOI: 10.1002/adma.201502003] [Citation(s) in RCA: 180] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2015] [Revised: 06/05/2015] [Indexed: 04/14/2023]
Abstract
A method for targeting to and retaining intravenously injected nanoparticles at the site of acute myocardial infarction in a rat model is described. Enzyme-responsive peptide-polymer amphiphiles are assembled as spherical micellar nanoparticles, and undergo a morphological transition from spherical-shaped, discrete materials to network-like assemblies when acted upon by matrix metalloproteinases (MMP-2 and MMP-9), which are up-regulated in heart tissue post-myocardial infarction.
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Affiliation(s)
| | | | - Miao-Ping Chien
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, CA 92093, USA
| | - Sonya Sonnenberg
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Colin Luo
- Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Rebecca L. Braden
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Kent G. Osborn
- Animal Care Program, University of California, San Diego, La Jolla, CA 92093, USA
| | - Yiwen Li
- Department of Chemistry & Biochemistry, niversity of California, San Diego, La Jolla, CA 92093, USA
| | - Nathan C. Gianneschi
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, CA 92093, USA
| | - Karen L. Christman
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA 92093, USA
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Suarez SL, Rane AA, Muñoz A, Wright AT, Zhang SX, Braden RL, Almutairi A, McCulloch AD, Christman KL. Intramyocardial injection of hydrogel with high interstitial spread does not impact action potential propagation. Acta Biomater 2015; 26:13-22. [PMID: 26265060 DOI: 10.1016/j.actbio.2015.08.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [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: 05/05/2015] [Revised: 07/29/2015] [Accepted: 08/06/2015] [Indexed: 12/31/2022]
Abstract
Injectable biomaterials have been evaluated as potential new therapies for myocardial infarction (MI) and heart failure. These materials have improved left ventricular (LV) geometry and ejection fraction, yet there remain concerns that biomaterial injection may create a substrate for arrhythmia. Since studies of this risk are lacking, we utilized optical mapping to assess the effects of biomaterial injection and interstitial spread on cardiac electrophysiology. Healthy and infarcted rat hearts were injected with a model poly(ethylene glycol) hydrogel with varying degrees of interstitial spread. Activation maps demonstrated delayed propagation of action potentials across the LV epicardium in the hydrogel-injected group when compared to saline and no-injection groups. However, the degree of the electrophysiological changes depended on the spread characteristics of the hydrogel, such that hearts injected with highly spread hydrogels showed no conduction abnormalities. Conversely, the results of this study indicate that injection of a hydrogel exhibiting minimal interstitial spread may create a substrate for arrhythmia shortly after injection by causing LV activation delays and reducing gap junction density at the site of injection. Thus, this work establishes site of delivery and interstitial spread characteristics as important factors in the future design and use of biomaterial therapies for MI treatment. STATEMENT OF SIGNIFICANCE Biomaterials for treating myocardial infarction have become an increasingly popular area of research. Within the past few years, this work has transitioned to some large animals models, and Phase I & II clinical trials. While these materials have preserved/improved cardiac function the effect of these materials on arrhythmogenesis, which is of considerable concern when injecting anything into the heart, has yet to be understood. Our manuscript is therefore a first of its kind in that it directly examines the potential of an injectable material to create a substrate for arrhythmias. This work suggests that site of delivery and distribution in the tissue are important criteria in the design and development of future biomaterial therapies for myocardial infarction treatment.
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Affiliation(s)
- Sophia L Suarez
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA; Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA 92037, USA; Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California at San Diego, La Jolla, CA 92093, USA
| | - Aboli A Rane
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA; Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA 92037, USA
| | - Adam Muñoz
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA; Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA 92037, USA
| | - Adam T Wright
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA
| | - Shirley X Zhang
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA; Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA 92037, USA
| | - Rebecca L Braden
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA; Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA 92037, USA
| | - Adah Almutairi
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California at San Diego, La Jolla, CA 92093, USA.
| | - Andrew D McCulloch
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA
| | - Karen L Christman
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA; Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, CA 92037, USA.
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Johnson TD, Hill RC, Dzieciatkowska M, Nigam V, Behfar A, Christman KL, Hansen KC. Quantification of decellularized human myocardial matrix: A comparison of six patients. Proteomics Clin Appl 2015; 10:75-83. [PMID: 26172914 DOI: 10.1002/prca.201500048] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 06/15/2015] [Accepted: 07/07/2015] [Indexed: 11/06/2022]
Abstract
PURPOSE The purpose of this study was to characterize and quantitatively analyze human cardiac extracellular matrix (ECM) isolated from six different cadaveric donor hearts. EXPERIMENTAL DESIGN ECM was isolated by decellularization of six human cadaveric donor hearts and characterized by quantifying sulfated glycosaminoglycan content (sGAG) and via PAGE. The protein content was then quantified using ECM-targeted Quantitative conCATamers (QconCAT) by LC-SRM analysis using 83 stable isotope labeled (SIL) peptides representing 48 different proteins. Nontargeted global analysis was also implemented using LC-MS/MS. RESULTS The sGAG content, PAGE, and QconCAT proteomics analysis showed significant variation between each of the six patient samples. The quantitative proteomics indicated that the majority of the protein content was composed of various fibrillar collagen components. Also, quantification of difficult to remove cellular proteins represented less than 1% of total protein content, which is very low for a decellularized biomaterial. Global proteomics identified over 200 distinct proteins present in the human cardiac ECM. CONCLUSION AND CLINICAL RELEVANCE In conclusion, quantification and characterization of human myocardial ECM showed significant patient-to-patient variability between the six investigated patients. This is an important outcome for the development of allogeneic derived biomaterials and for increasing our understanding of human myocardial ECM composition.
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Affiliation(s)
- Todd D Johnson
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California at San Diego, La Jolla, CA, USA
| | - Ryan C Hill
- Department of Biochemistry and Molecular Genetics, School of Medicine, University of Colorado, Aurora, CO, USA
| | - Monika Dzieciatkowska
- Department of Biochemistry and Molecular Genetics, School of Medicine, University of Colorado, Aurora, CO, USA
| | - Vishal Nigam
- Department of Pediatrics (Cardiology), University of California San Diego and Rady Children's Hospital, San Diego, La Jolla, CA, USA
| | - Atta Behfar
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA
| | - Karen L Christman
- Department of Bioengineering, Sanford Consortium for Regenerative Medicine, University of California at San Diego, La Jolla, CA, USA
| | - Kirk C Hansen
- Department of Biochemistry and Molecular Genetics, School of Medicine, University of Colorado, Aurora, CO, USA
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Grover GN, Garcia J, Nguyen MM, Zanotelli M, Madani MM, Christman KL. Binding of Anticell Adhesive Oxime-Crosslinked PEG Hydrogels to Cardiac Tissues. Adv Healthc Mater 2015; 4:1327-31. [PMID: 25963916 PMCID: PMC5812365 DOI: 10.1002/adhm.201500167] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [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: 03/10/2015] [Revised: 04/20/2015] [Indexed: 11/11/2022]
Abstract
Postsurgical cardiac adhesions increase the number of surgeries as well as patient mortality and morbidity. A fast gelling oxime-crosslinked PEG hydrogel with tunable gelation time, degradation, and mechanical properties is presented. This material is cytocompatible and prevents cellular adhesion. Material retention on different cardiac tissues is demonstrated ex vivo over time and that functional group ratio alters material retention on different cardiac tissues.
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Affiliation(s)
- Gregory N. Grover
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego USA
| | - Julian Garcia
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego USA
| | - Mary M. Nguyen
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego USA
| | - Matthew Zanotelli
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego USA
| | | | - Karen L. Christman
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego USA
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Merna N, Fung KM, Wang JJ, King CR, Hansen KC, Christman KL, George SC. Differential β3 Integrin Expression Regulates the Response of Human Lung and Cardiac Fibroblasts to Extracellular Matrix and Its Components. Tissue Eng Part A 2015; 21:2195-205. [PMID: 25926101 DOI: 10.1089/ten.tea.2014.0337] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Extracellular matrix (ECM) derived from whole organ decellularization has been successfully used in a variety of tissue engineering applications. ECM contains a complex mixture of functional and structural molecules that are ideally suited for the tissue from which the ECM is harvested. However, decellularization disrupts the structural properties and protein composition of the ECM, which may impact function when cells such as the fibroblast are reintroduced during recellularization. We hypothesized that the ECM structure and composition, fibroblast source, and integrin expression would influence the fibroblast phenotype. Human cardiac fibroblasts (HCFs) and normal human lung fibroblasts (NHLFs) were cultured on intact cardiac ECM, collagen gels, and coatings composed of cardiac ECM, lung ECM, and individual ECM components (collagen and fibronectin [FN]) for 48 h. COL1A expression of HCFs and NHLFs cultured on ECM and FN coatings decreased to <50% of that of untreated cells; COL1A expression for HCFs cultured on ECM coatings was one- to twofold higher than HCFs cultured on intact ECM. NHLFs cultured on ECM and FN coatings expressed 12- to 31-fold more alpha-smooth muscle actin (αSMA) than HCFs; the αSMA expression for HCFs and NHLFs cultured on ECM coatings was ∼2- to 5-fold higher than HCFs and NHLFs cultured on intact ECM. HCFs expressed significantly higher levels of β3 and β4 integrins when compared to NHLFs. Inhibition of the β3 integrin, but not β4, resulted in a 16- to 26-fold increase in αSMA expression in HCFs cultured on ECM coatings and FN. Our results demonstrate that β3 integrin expression depends on the source of the fibroblast and that its expression inhibits αSMA expression (and thus the myofibroblast phenotype). We conclude that the fibroblast source and integrin expression play important roles in regulating the fibroblast phenotype.
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Affiliation(s)
- Nick Merna
- 1 Department of Biomedical Engineering, University of California , Irvine, California
| | - Kelsey M Fung
- 1 Department of Biomedical Engineering, University of California , Irvine, California
| | - Jean J Wang
- 2 Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California , San Diego, La Jolla, California
| | - Cristi R King
- 3 Department of Biomedical Engineering, Washington University in St. Louis , Missouri
| | - Kirk C Hansen
- 4 Department of Biochemistry and Molecular Genetics, University of Colorado , Denver, Colorado
| | - Karen L Christman
- 2 Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California , San Diego, La Jolla, California
| | - Steven C George
- 3 Department of Biomedical Engineering, Washington University in St. Louis , Missouri
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Gaetani R, Feyen DAM, Verhage V, Slaats R, Messina E, Christman KL, Giacomello A, Doevendans PAFM, Sluijter JPG. Epicardial application of cardiac progenitor cells in a 3D-printed gelatin/hyaluronic acid patch preserves cardiac function after myocardial infarction. Biomaterials 2015; 61:339-48. [PMID: 26043062 DOI: 10.1016/j.biomaterials.2015.05.005] [Citation(s) in RCA: 190] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 05/03/2015] [Indexed: 02/08/2023]
Abstract
Cardiac cell therapy suffers from limitations related to poor engraftment and significant cell death after transplantation. In this regard, ex vivo tissue engineering is a tool that has been demonstrated to increase cell retention and survival. The aim of our study was to evaluate the therapeutic potential of a 3D-printed patch composed of human cardiac-derived progenitor cells (hCMPCs) in a hyaluronic acid/gelatin (HA/gel) based matrix. hCMPCs were printed in the HA/gel matrix (30 × 10(6) cells/ml) to form a biocomplex made of six perpendicularly printed layers with a surface of 2 × 2 cm and thickness of 400 μm, in which they retained their viability, proliferation and differentiation capability. The printed biocomplex was transplanted in a mouse model of myocardial infarction (MI). The application of the patch led to a significant reduction in adverse remodeling and preservation of cardiac performance as was shown by both MRI and histology. Furthermore, the matrix supported the long-term in vivo survival and engraftment of hCMPCs, which exhibited a temporal increase in cardiac and vascular differentiation markers over the course of the 4 week follow-up period. Overall, we developed an effective and translational approach to enhance hCMPC delivery and action in the heart.
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Affiliation(s)
- Roberto Gaetani
- Dept. of Cardiology, DH&L, University Medical Center Utrecht, Utrecht, The Netherlands; Dept. of Molecular Medicine, Cenci-Bolognetti Foundation, Pasteur Institute, "Sapienza" University of Rome, Rome, Italy; Dept. of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, USA.
| | - Dries A M Feyen
- Dept. of Cardiology, DH&L, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Vera Verhage
- Dept. of Cardiology, DH&L, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Rolf Slaats
- Dept. of Cardiology, DH&L, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Elisa Messina
- Dept. of Molecular Medicine, Cenci-Bolognetti Foundation, Pasteur Institute, "Sapienza" University of Rome, Rome, Italy
| | - Karen L Christman
- Dept. of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California, San Diego, La Jolla, USA
| | - Alessandro Giacomello
- Dept. of Molecular Medicine, Cenci-Bolognetti Foundation, Pasteur Institute, "Sapienza" University of Rome, Rome, Italy
| | - Pieter A F M Doevendans
- Dept. of Cardiology, DH&L, University Medical Center Utrecht, Utrecht, The Netherlands; Interuniversity Cardiology Institute of the Netherlands (ICIN), Utrecht, The Netherlands
| | - Joost P G Sluijter
- Dept. of Cardiology, DH&L, University Medical Center Utrecht, Utrecht, The Netherlands; Interuniversity Cardiology Institute of the Netherlands (ICIN), Utrecht, The Netherlands.
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