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Yan H, Hu Y, Akk A, Wickline SA, Pan H, Pham CTN. Peptide-siRNA nanoparticles targeting NF-κB p50 mitigate experimental abdominal aortic aneurysm progression and rupture. Biomater Adv 2022; 139:213009. [PMID: 35891603 PMCID: PMC9378586 DOI: 10.1016/j.bioadv.2022.213009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 02/24/2022] [Revised: 06/10/2022] [Accepted: 06/29/2022] [Indexed: 06/12/2023]
Abstract
Abdominal aortic aneurysm (AAA) is a progressive vascular condition associated with high risk of mortality if left untreated. AAA is an inflammatory process with excessive local production of extracellular matrix degrading enzymes, leading to dilatation and rupture of the abdominal aorta. We posit that targeting NF-κB, a signaling pathway that controls inflammation, will halt AAA progression and prevent rupture. In an elastase-induced AAA model we observed that NF-κB activation increased progressively post-elastase perfusion. Unexpectedly, we found that AAA progression was marked by predominant nuclear accumulation of the NF-κB p50 subunit at the exclusion of p65. Using the amphipathic peptide p5RHH to form nanocomplexes with siRNA, we sought to mitigate AAA progression by knocking down the expression of different NF-κB subunits. We found that the administration of NF-κB p65 siRNA was only beneficial when given early (day 3 post-elastase perfusion) while p50 siRNA was still effective in mitigating elastase-induced AAA even when delivery was delayed until day 5. Additionally, systemic delivery of p50 siRNA, but not p65 siRNA decreased the risk of aortic rupture and sudden death in the transforming growth factor-beta blockade model of AAA. In both murine models, knockdown of NF-κB was accompanied by a significant decrease in leukocyte infiltrates, inflammatory cytokine release, inducible nitric oxide synthase expression, and cell apoptosis. These results suggest that the NF-κB p50 and p65 subunits contribute differentially at different stages of disease and the timing of in vivo siRNA delivery was of critical importance. The results also provide a rationale for selective targeting of p50 for more specific therapeutic intervention in the medical treatment of small AAA.
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Affiliation(s)
- Huimin Yan
- The John Cochran VA Medical Center, Saint Louis, MO, United States of America; The Department of Medicine, Division of Rheumatology, Washington University School of Medicine, Saint Louis, MO, United States of America
| | - Ying Hu
- The John Cochran VA Medical Center, Saint Louis, MO, United States of America; The Department of Medicine, Division of Rheumatology, Washington University School of Medicine, Saint Louis, MO, United States of America
| | - Antonina Akk
- The Department of Medicine, Division of Rheumatology, Washington University School of Medicine, Saint Louis, MO, United States of America
| | - Samuel A Wickline
- University of South Florida Health Heart Institute, Morsani College of Medicine, Tampa, FL, United States of America
| | - Hua Pan
- The Department of Medicine, Division of Rheumatology, Washington University School of Medicine, Saint Louis, MO, United States of America
| | - Christine T N Pham
- The John Cochran VA Medical Center, Saint Louis, MO, United States of America; The Department of Medicine, Division of Rheumatology, Washington University School of Medicine, Saint Louis, MO, United States of America.
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Zhou Q, Doherty J, Akk A, Springer LE, Fan P, Spasojevic I, Halade GV, Yang H, Pham CTN, Wickline SA, Pan H. Safety Profile of Rapamycin Perfluorocarbon Nanoparticles for Preventing Cisplatin-Induced Kidney Injury. Nanomaterials (Basel) 2022; 12:336. [PMID: 35159680 PMCID: PMC8839776 DOI: 10.3390/nano12030336] [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] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 01/09/2022] [Accepted: 01/14/2022] [Indexed: 12/30/2022]
Abstract
Cancer treatment-induced toxicities may restrict maximal effective dosing for treatment and cancer survivors' quality of life. It is critical to develop novel strategies that mitigate treatment-induced toxicity without affecting the efficacy of anti-cancer therapies. Rapamycin is a macrolide with anti-cancer properties, but its clinical application has been hindered, partly by unfavorable bioavailability, pharmacokinetics, and side effects. As a result, significant efforts have been undertaken to develop a variety of nano-delivery systems for the effective and safe administration of rapamycin. While the efficacy of nanostructures carrying rapamycin has been studied intensively, the pharmacokinetics, biodistribution, and safety remain to be investigated. In this study, we demonstrate the potential for rapamycin perfluorocarbon (PFC) nanoparticles to mitigate cisplatin-induced acute kidney injury with a single preventative dose. Evaluations of pharmacokinetics and biodistribution suggest that the PFC nanoparticle delivery system improves rapamycin pharmacokinetics. The safety of rapamycin PFC nanoparticles was shown both in vitro and in vivo. After a single dose, no disturbance was observed in blood tests or cardiac functional evaluations. Repeated dosing of rapamycin PFC nanoparticles did not affect overall spleen T cell proliferation and responses to stimulation, although it significantly decreased the number of Foxp3+CD4+ T cells and NK1.1+ cells were observed.
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Affiliation(s)
- Qingyu Zhou
- Department of Pharmaceutical Sciences, Taneja College of Pharmacy, University of South Florida, Tampa, FL 33612, USA
| | - Justin Doherty
- USF Health Heart Institute, University of South Florida, Tampa, FL 33602, USA; (J.D.); (G.V.H.); (S.A.W.)
| | - Antonina Akk
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA; (A.A.); (L.E.S.); (C.T.N.P.)
| | - Luke E. Springer
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA; (A.A.); (L.E.S.); (C.T.N.P.)
| | - Ping Fan
- School of Medicine, Duke University, Durham, NC 27708, USA; (P.F.); (I.S.); (H.Y.)
| | - Ivan Spasojevic
- School of Medicine, Duke University, Durham, NC 27708, USA; (P.F.); (I.S.); (H.Y.)
| | - Ganesh V. Halade
- USF Health Heart Institute, University of South Florida, Tampa, FL 33602, USA; (J.D.); (G.V.H.); (S.A.W.)
| | - Huanghe Yang
- School of Medicine, Duke University, Durham, NC 27708, USA; (P.F.); (I.S.); (H.Y.)
| | - Christine T. N. Pham
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA; (A.A.); (L.E.S.); (C.T.N.P.)
- John Cochran Veterans Affairs Medical Center, St. Louis, MO 63106, USA
| | - Samuel A. Wickline
- USF Health Heart Institute, University of South Florida, Tampa, FL 33602, USA; (J.D.); (G.V.H.); (S.A.W.)
- Altamira Therapeutics Inc., Dover, DE 19901, USA
| | - Hua Pan
- USF Health Heart Institute, University of South Florida, Tampa, FL 33602, USA; (J.D.); (G.V.H.); (S.A.W.)
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Yan H, Hu Y, Akk A, Rai MF, Pan H, Wickline SA, Pham CT. Induction of WNT16 via Peptide-mRNA Nanoparticle-Based Delivery Maintains Cartilage Homeostasis. Pharmaceutics 2020; 12:pharmaceutics12010073. [PMID: 31963412 PMCID: PMC7022671 DOI: 10.3390/pharmaceutics12010073] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [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] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 12/27/2019] [Accepted: 01/13/2020] [Indexed: 01/02/2023] Open
Abstract
Osteoarthritis (OA) is a progressive joint disease that causes significant disability and pain and for which there are limited treatment options. We posit that delivery of anabolic factors that protect and maintain cartilage homeostasis will halt or retard OA progression. We employ a peptide-based nanoplatform to deliver Wingless and the name Int-1 (WNT) 16 messenger RNA (mRNA) to human cartilage explants. The peptide forms a self-assembled nanocomplex of approximately 65 nm in size when incubated with WNT16 mRNA. The complex is further stabilized with hyaluronic acid (HA) for enhanced cellular uptake. Delivery of peptide-WNT16 mRNA nanocomplex to human cartilage explants antagonizes canonical β-catenin/WNT3a signaling, leading to increased lubricin production and decreased chondrocyte apoptosis. This is a proof-of-concept study showing that mRNA can be efficiently delivered to articular cartilage, an avascular tissue that is poorly accessible even when drugs are intra-articularly (IA) administered. The ability to accommodate a wide range of oligonucleotides suggests that this platform may find use in a broad range of clinical applications.
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Affiliation(s)
- Huimin Yan
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA; (H.Y.); (Y.H.)
- John Cochran Veterans Affairs Medical Center, St. Louis, MO 63106, USA
| | - Ying Hu
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA; (H.Y.); (Y.H.)
- John Cochran Veterans Affairs Medical Center, St. Louis, MO 63106, USA
| | - Antonina Akk
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA; (H.Y.); (Y.H.)
| | - Muhammad Farooq Rai
- Department of Orthopaedic Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA;
| | - Hua Pan
- Department of Cardiovascular Sciences, University of South Florida, Tampa, FL 33620, USA;
| | - Samuel A. Wickline
- Department of Cardiovascular Sciences, University of South Florida, Tampa, FL 33620, USA;
- Correspondence: (S.A.W.); (C.T.N.P.)
| | - Christine T.N. Pham
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA; (H.Y.); (Y.H.)
- John Cochran Veterans Affairs Medical Center, St. Louis, MO 63106, USA
- Correspondence: (S.A.W.); (C.T.N.P.)
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Akk A, Springer LE, Yang L, Hamilton-Burdess S, Lambris JD, Yan H, Hu Y, Wu X, Hourcade DE, Miller MJ, Pham CTN. Complement activation on neutrophils initiates endothelial adhesion and extravasation. Mol Immunol 2019; 114:629-642. [PMID: 31542608 PMCID: PMC6815348 DOI: 10.1016/j.molimm.2019.09.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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: 03/29/2019] [Revised: 09/08/2019] [Accepted: 09/08/2019] [Indexed: 01/07/2023]
Abstract
Neutrophils are essential to the pathogenesis of many inflammatory diseases. In the autoantibody-mediated K/BxN model of inflammatory arthritis, the alternative pathway (AP) of complement and Fc gamma receptors (FcγRs) are required for disease development while the classical pathway is dispensable. The reason for this differential requirement is unknown. We show that within minutes of K/BxN serum injection complement activation (CA) is detected on circulating neutrophils, as evidenced by cell surface C3 fragment deposition. CA requires the AP factor B and FcγRs but not C4, implying that engagement of FcγRs by autoantibody or immune complexes directly triggers AP C3 convertase assembly. The absence of C5 does not prevent CA on neutrophils but diminishes the upregulation of adhesion molecules. In vivo two-photon microscopy reveals that CA on neutrophils is critical for neutrophil extravasation and generation of C5a at the site of inflammation. C5a stimulates the release of neutrophil proteases, which contribute to the degradation of VE-cadherin, an adherens junction protein that regulates endothelial barrier integrity. C5a receptor antagonism blocks the extracellular release of neutrophil proteases, suppressing VE-cadherin degradation and neutrophil transendothelial migration in vivo. These results elucidate the AP-dependent intravascular neutrophil-endothelial interactions that initiate the inflammatory cascade in this disease model but may be generalizable to neutrophil extravasation in other inflammatory processes.
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Affiliation(s)
- Antonina Akk
- Division of Rheumatology, Department of Medicine, Washington University School of Medicine, Saint Louis, MO, USA
| | - Luke E Springer
- Division of Rheumatology, Department of Medicine, Washington University School of Medicine, Saint Louis, MO, USA
| | - Lihua Yang
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, Saint Louis, MO, USA
| | - Samantha Hamilton-Burdess
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, Saint Louis, MO, USA
| | - John D Lambris
- Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA, USA
| | - Huimin Yan
- Division of Rheumatology, Department of Medicine, Washington University School of Medicine, Saint Louis, MO, USA
| | - Ying Hu
- Division of Rheumatology, Department of Medicine, Washington University School of Medicine, Saint Louis, MO, USA
| | - Xiaobo Wu
- Division of Rheumatology, Department of Medicine, Washington University School of Medicine, Saint Louis, MO, USA
| | - Dennis E Hourcade
- Division of Rheumatology, Department of Medicine, Washington University School of Medicine, Saint Louis, MO, USA
| | - Mark J Miller
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, Saint Louis, MO, USA.
| | - Christine T N Pham
- Division of Rheumatology, Department of Medicine, Washington University School of Medicine, Saint Louis, MO, USA; John Cochran VA Medical Center, Saint Louis, MO, USA.
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Yan H, Hu Y, Akk A, Ye K, Bacon J, Pham CTN. Interleukin-12 and -23 blockade mitigates elastase-induced abdominal aortic aneurysm. Sci Rep 2019; 9:10447. [PMID: 31320700 PMCID: PMC6639297 DOI: 10.1038/s41598-019-46909-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 07/05/2019] [Indexed: 12/13/2022] Open
Abstract
Macrophages play an important role in the inflammatory process that contributes to the development of abdominal aortic aneurysm (AAA). Studies of human and mouse AAA tissue reveal expanded populations of macrophages producing an abundance of pro-inflammatory cytokines, including TNF-α, IL-12p40 and high level of metalloprotease 9 (MMP-9) at the late stages of disease. Herein, we show that blockade of IL-12p40 in the early phase of aneurysm development suppresses macrophage expansion, inflammatory cytokine and MMP-9 production and mitigates AAA development. Since IL-12 and IL-23 are related cytokines that share the common p40 subunit, we also evaluate the effect of direct IL-23 blockade on the development of AAA. Specific IL-23p19 blockade prevents AAA progression with the same efficiency as IL-12p40 antagonism, suggesting that the efficacy of anti-IL-12p40 treatment may reflect IL-23 blockade. IL-12p40 and IL-23p19 are also abundantly expressed in human AAA tissue. Our findings have potential translational value since IL-12p40 and IL-23p19 antagonists already exist as FDA-approved therapeutics for various chronic inflammatory conditions.
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Affiliation(s)
- Huimin Yan
- John Cochran VA Medical Center, Saint Louis, Missouri, USA.,Department of Medicine, Division of Rheumatology, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Ying Hu
- John Cochran VA Medical Center, Saint Louis, Missouri, USA.,Department of Medicine, Division of Rheumatology, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Antonina Akk
- John Cochran VA Medical Center, Saint Louis, Missouri, USA.,Department of Medicine, Division of Rheumatology, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Karen Ye
- John Cochran VA Medical Center, Saint Louis, Missouri, USA.,Department of Medicine, Division of Rheumatology, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - John Bacon
- John Cochran VA Medical Center, Saint Louis, Missouri, USA.,Department of Medicine, Division of Rheumatology, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Christine T N Pham
- John Cochran VA Medical Center, Saint Louis, Missouri, USA. .,Department of Medicine, Division of Rheumatology, Washington University School of Medicine, Saint Louis, Missouri, USA. .,Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, Missouri, USA.
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Yan H, Duan X, Pan H, Akk A, Sandell LJ, Wickline SA, Rai MF, Pham CTN. Development of a peptide-siRNA nanocomplex targeting NF- κB for efficient cartilage delivery. Sci Rep 2019; 9:442. [PMID: 30679644 PMCID: PMC6345850 DOI: 10.1038/s41598-018-37018-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 11/23/2018] [Indexed: 12/16/2022] Open
Abstract
Delivery of therapeutic small interfering RNAs (siRNAs) in an effective dose to articular cartilage is very challenging as the cartilage dense extracellular matrix renders the chondrocytes inaccessible, even to intra-articular injections. Herein, we used a self-assembling peptidic nanoparticle (NP) platform featuring a cell penetrating peptide complexed to NF-κB p65 siRNA. We show that it efficiently and deeply penetrated human cartilage to deliver its siRNA cargo up to a depth of at least 700 μm. To simulate osteoarthritis in vitro, human articular cartilage explants were placed in culture and treated with IL-1β, a cytokine with known cartilage catabolic and pro-inflammatory effects. Exposure of peptide-siRNA NP to cartilage explants markedly suppressed p65 activation, an effect that persisted up to 3 weeks after an initial 48 h exposure to NP and in the presence of continuous IL-1β stimulation. Suppression of IL-1β-induced p65 activity attenuated chondrocyte apoptosis and maintained cartilage homeostasis. These findings confirm our previous in vivo studies in a murine model of post-traumatic osteoarthritis and suggest that the ability of peptide-siRNA NP to specifically modulate NF-κB pathway, a central regulator of the inflammatory responses in chondrocytes, may potentially mitigate the progression of cartilage degeneration.
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Affiliation(s)
- Huimin Yan
- Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Xin Duan
- Department of Orthopaedic Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - Hua Pan
- Department of Cardiovascular Sciences, University of South Florida Health Heart Institute, Morsani School of Medicine, Tampa, FL, USA
| | - Antonina Akk
- Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Linda J Sandell
- Department of Orthopaedic Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - Samuel A Wickline
- Department of Cardiovascular Sciences, University of South Florida Health Heart Institute, Morsani School of Medicine, Tampa, FL, USA
| | - Muhammad Farooq Rai
- Department of Orthopaedic Surgery, Washington University School of Medicine, St. Louis, MO, USA.,Department of Cell Biology & Physiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Christine T N Pham
- Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA. .,Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA.
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Wu X, Hutson I, Akk A, Pham C, Hourcade D, Brown R, Harris C, Atkinson J. Low levels of FD activate complement alternative pathway. Mol Immunol 2018. [DOI: 10.1016/j.molimm.2018.06.248] [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: 10/28/2022]
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Pham C, Akk A, Springer L, Yang L, Hamilton-Burdess S, Lambris J, Yan H, Hu Y, Wu X, Hourcade D, Miller M. Intravascular complement activation on neutrophils initiates the inflammatory cascade. Mol Immunol 2018. [DOI: 10.1016/j.molimm.2018.06.178] [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: 11/16/2022]
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Pan H, Palekar RU, Hou KK, Bacon J, Yan H, Springer LE, Akk A, Yang L, Miller MJ, Pham CT, Schlesinger PH, Wickline SA. Anti-JNK2 peptide-siRNA nanostructures improve plaque endothelium and reduce thrombotic risk in atherosclerotic mice. Int J Nanomedicine 2018; 13:5187-5205. [PMID: 30233180 PMCID: PMC6135209 DOI: 10.2147/ijn.s168556] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [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] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND A direct and independent role of inflammation in atherothrombosis was recently highlighted by the Canakinumab Antiinflammatory Thrombosis Outcome Study (CANTOS) trial, showing the benefit of inhibiting signaling molecules, eg, interleukins. Accordingly, we sought to devise a flexible platform for preventing the inflammatory drivers at their source to preserve plaque endothelium and mitigate procoagulant risk. METHODS p5RHH-siRNA nanoparticles were formulated through self-assembly processes. The therapeutic efficacy of p5RHH-JNK2 siRNA nanoparticles was evaluated both in vitro and in vivo. RESULTS Because JNK2 is critical to macrophage uptake of oxidized lipids through scavenger receptors that engender expression of myriad inflammatory molecules, we designed an RNA-silencing approach based on peptide-siRNA nanoparticles (p5RHH-siRNA) that localize to atherosclerotic plaques exhibiting disrupted endothelial barriers to achieve control of JNK2 expression by macrophages. After seven doses of p5RHH-JNK2 siRNA nanoparticles over 3.5 weeks in ApoE-/- mice on a Western diet, both JNK2 mRNA and protein levels were significantly decreased by 26% (P=0.044) and 42% (P=0.042), respectively. Plaque-macrophage populations were markedly depleted and NFκB and STAT3-signaling pathways inhibited by 47% (P<0.001) and 46% (P=0.004), respectively. Endothelial barrier integrity was restored (2.6-fold reduced permeability to circulating 200 nm nanoparticles in vivo, P=0.003) and thrombotic risk attenuated (200% increased clotting times to carotid artery injury, P=0.02), despite blood-cholesterol levels persistently exceeding 1,000 mg/dL. No adaptive or innate immunoresponses toward the nanoparticles were observed, and blood tests after the completion of treatment confirmed the largely nontoxic nature of this approach. CONCLUSION The ability to formulate these nanostructures rapidly and easily interchange or multiplex their oligonucleotide content represents a promising approach for controlling deleterious signaling events locally in advanced atherosclerosis.
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Affiliation(s)
- Hua Pan
- Department of Cardiovascular Sciences, USF Health, Morsani College of Medicine, The USF Health Heart Institute, University of South Florida, Tampa, FL, USA, ,
| | - Rohun U Palekar
- Department of Medicine, Washington University, St Louis, MO, USA
| | - Kirk K Hou
- Department of Biomedical Engineering, Washington University, St Louis, MO, USA
| | - John Bacon
- Department of Medicine, Washington University, St Louis, MO, USA
| | - Huimin Yan
- Department of Biomedical Engineering, Washington University, St Louis, MO, USA
| | - Luke E Springer
- Department of Biomedical Engineering, Washington University, St Louis, MO, USA
| | - Antonina Akk
- Department of Biomedical Engineering, Washington University, St Louis, MO, USA
| | - Lihua Yang
- Department of Biomedical Engineering, Washington University, St Louis, MO, USA
| | - Mark J Miller
- Department of Biomedical Engineering, Washington University, St Louis, MO, USA
| | - Christine Tn Pham
- Department of Biomedical Engineering, Washington University, St Louis, MO, USA
| | - Paul H Schlesinger
- Department of Biomedical Engineering, Washington University, St Louis, MO, USA
| | - Samuel A Wickline
- Department of Cardiovascular Sciences, USF Health, Morsani College of Medicine, The USF Health Heart Institute, University of South Florida, Tampa, FL, USA, ,
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Pan H, Palekar R, Hou K, Bacon J, Yan H, Springer L, Akk A, Pham C, Schlesinger P, Wickline S. P1273JNK-2 silencing with focally acting peptide-siRNA nanostructures modulates plaque inflammation in atherosclerotic mice. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- H Pan
- University of South Florida, The Heart Institute, Tampa, United States of America
| | - R Palekar
- Washington University School of Medicine, St. Louis, United States of America
| | - K Hou
- Washington University School of Medicine, St. Louis, United States of America
| | - J Bacon
- Washington University School of Medicine, St. Louis, United States of America
| | - H Yan
- Washington University School of Medicine, St. Louis, United States of America
| | - L Springer
- Washington University School of Medicine, St. Louis, United States of America
| | - A Akk
- Washington University School of Medicine, St. Louis, United States of America
| | - C Pham
- Washington University School of Medicine, St. Louis, United States of America
| | - P Schlesinger
- Washington University School of Medicine, St. Louis, United States of America
| | - S Wickline
- University of South Florida, The Heart Institute, Tampa, United States of America
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Akk A, Springer LE, Pham CTN. Neutrophil Extracellular Traps Enhance Early Inflammatory Response in Sendai Virus-Induced Asthma Phenotype. Front Immunol 2016; 7:325. [PMID: 27617014 PMCID: PMC4999646 DOI: 10.3389/fimmu.2016.00325] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 08/15/2016] [Indexed: 12/30/2022] Open
Abstract
Paramyxoviral infection in childhood has been linked to a significant increased rate of asthma development. In mice, paramyxoviral infection with the mouse parainfluenza virus type I, Sendai virus (Sev), causes a limited bronchiolitis followed by persistent asthma traits. We have previously shown that the absence of cysteine protease dipeptidyl peptidase I (DPPI) dampened the acute lung inflammatory response and the subsequent asthma phenotype induced by Sev. Adoptive transfer of wild-type neutrophils into DPPI-deficient mice restored leukocyte influx, the acute cytokine response, and the subsequent mucous cell metaplasia that accompanied Sev-induced asthma phenotype. However, the exact mechanism by which DPPI-sufficient neutrophils promote asthma development following Sev infection is still unknown. We hypothesize that neutrophils recruited to the alveolar space following Sev infection elaborate neutrophil extracellular traps (NETs) that propagate the inflammatory cascade, culminating in the eventual asthma phenotype. Indeed, we found that Sev infection was associated with NET formation in the lung and release of cell-free DNA complexed to myeloperoxidase in the alveolar space and plasma that peaked on day 2 post infection. Absence of DPPI significantly attenuated Sev-induced NET formation in vivo and in vitro. Furthermore, concomitant administration of DNase 1, which dismantled NETs, or inhibition of peptidylarginine deiminase 4 (PAD4), an essential mediator of NET formation, suppressed the early inflammatory responses to Sev infection. Lastly, NETs primed bone marrow-derived cells to release cytokines that can amplify the inflammatory cascade.
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Affiliation(s)
- Antonina Akk
- Department of Medicine, Division of Rheumatology, Washington University School of Medicine , Saint Louis, MO , USA
| | - Luke E Springer
- Department of Medicine, Division of Rheumatology, Washington University School of Medicine , Saint Louis, MO , USA
| | - Christine T N Pham
- Department of Medicine, Division of Rheumatology, Washington University School of Medicine , Saint Louis, MO , USA
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Yan H, Zhou HF, Akk A, Hu Y, Springer LE, Ennis TL, Pham CTN. Neutrophil Proteases Promote Experimental Abdominal Aortic Aneurysm via Extracellular Trap Release and Plasmacytoid Dendritic Cell Activation. Arterioscler Thromb Vasc Biol 2016; 36:1660-1669. [PMID: 27283739 DOI: 10.1161/atvbaha.116.307786] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [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: 01/13/2016] [Accepted: 05/27/2016] [Indexed: 12/16/2022]
Abstract
OBJECTIVE We previously established that neutrophil-derived dipeptidyl peptidase I (DPPI) is essential for experimental abdominal aortic aneurysm (AAA) development. Because DPPI activates several neutrophil serine proteases, it remains to be determined whether the AAA-promoting effect of DPPI is mediated by neutrophil serine proteases. APPROACH AND RESULTS Using an elastase-induced AAA model, we demonstrate that the absence of 2 neutrophil serine proteases, neutrophil elastase and proteinase-3, recapitulates the AAA-resistant phenotype of DPPI-deficient mice. DPPI and neutrophil serine proteases direct the in vitro and in vivo release of extracellular structures termed neutrophil extracellular traps (NETs). Administration of DNase1, which dismantles NETs, suppresses elastase-induced AAA in wild-type animals and in DPPI-deficient mice reconstituted with wild-type neutrophils. NETs also contain the cathelicidin-related antimicrobial peptide that complexes with self-DNA in recruiting plasmacytoid dendritic cells (pDCs), inducing type I interferons (IFNs) and promoting AAA in DPPI-deficient mice. Conversely, depletion of pDCs or blockade of type I IFNs suppresses experimental AAA. Moreover, we find an abundance of human cathelicidin peptide, a 37 amino acid sequence starting with 2 leucines and the human orthologue of cathelicidin-related antimicrobial peptide, in the vicinity of pDCs in human AAA tissues. Increased type I IFN mRNA expression is observed in human AAA tissues and circulating IFN-α is detected in ≈50% of the AAA sera examined. CONCLUSIONS These results suggest that neutrophil protease-mediated NET release contributes to elastase-induced AAA through pDC activation and type I IFN production. These findings increase our understanding of the pathways underlying AAA inflammatory responses and suggest that limiting NET, pDC, and type I IFN activities may suppress aneurysm progression.
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Affiliation(s)
- Huimin Yan
- John Cochran VA Medical Center, Saint Louis, Missouri USA; the Department of Medicine, Division of Rheumatology and the Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Hui-Fang Zhou
- John Cochran VA Medical Center, Saint Louis, Missouri USA; the Department of Medicine, Division of Rheumatology and the Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Antonina Akk
- John Cochran VA Medical Center, Saint Louis, Missouri USA; the Department of Medicine, Division of Rheumatology and the Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Ying Hu
- John Cochran VA Medical Center, Saint Louis, Missouri USA; the Department of Medicine, Division of Rheumatology and the Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Luke E Springer
- John Cochran VA Medical Center, Saint Louis, Missouri USA; the Department of Medicine, Division of Rheumatology and the Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Terri L Ennis
- John Cochran VA Medical Center, Saint Louis, Missouri USA; the Department of Medicine, Division of Rheumatology and the Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Christine T N Pham
- John Cochran VA Medical Center, Saint Louis, Missouri USA; the Department of Medicine, Division of Rheumatology and the Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, Saint Louis, Missouri, USA
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13
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Palekar RU, Jallouk AP, Goette MJ, Chen J, Myerson JW, Allen JS, Akk A, Yang L, Tu Y, Miller MJ, Pham CTN, Wickline SA, Pan H. Quantifying progression and regression of thrombotic risk in experimental atherosclerosis. FASEB J 2015; 29:3100-9. [PMID: 25857553 DOI: 10.1096/fj.14-269084] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Accepted: 03/16/2015] [Indexed: 12/17/2022]
Abstract
Currently, there are no generally applicable noninvasive methods for defining the relationship between atherosclerotic vascular damage and risk of focal thrombosis. Herein, we demonstrate methods to delineate the progression and regression of vascular damage in response to an atherogenic diet by quantifying the in vivo accumulation of semipermeable 200-300 nm perfluorocarbon core nanoparticles (PFC-NP) in ApoE null mouse plaques with [(19)F] magnetic resonance spectroscopy (MRS). Permeability to PFC-NP remained minimal until 12 weeks on diet, then increased rapidly following 12 weeks, but regressed to baseline within 8 weeks after diet normalization. Markedly accelerated clotting (53.3% decrease in clotting time) was observed in carotid artery preparations of fat-fed mice subjected to photochemical injury as defined by the time to flow cessation. For all mice on and off diet, an inverse linear relationship was observed between the permeability to PFC-NP and accelerated thrombosis (P = 0.02). Translational feasibility for quantifying plaque permeability and vascular damage in vivo was demonstrated with clinical 3 T MRI of PFC-NP accumulating in plaques of atherosclerotic rabbits. These observations suggest that excessive permeability to PFC-NP may indicate prothrombotic risk in damaged atherosclerotic vasculature, which resolves within weeks after dietary therapy.
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Affiliation(s)
- Rohun U Palekar
- *Department of Biomedical Engineering and Department of Medicine, Washington University, St. Louis, Missouri, USA
| | - Andrew P Jallouk
- *Department of Biomedical Engineering and Department of Medicine, Washington University, St. Louis, Missouri, USA
| | - Matthew J Goette
- *Department of Biomedical Engineering and Department of Medicine, Washington University, St. Louis, Missouri, USA
| | - Junjie Chen
- *Department of Biomedical Engineering and Department of Medicine, Washington University, St. Louis, Missouri, USA
| | - Jacob W Myerson
- *Department of Biomedical Engineering and Department of Medicine, Washington University, St. Louis, Missouri, USA
| | - John S Allen
- *Department of Biomedical Engineering and Department of Medicine, Washington University, St. Louis, Missouri, USA
| | - Antonina Akk
- *Department of Biomedical Engineering and Department of Medicine, Washington University, St. Louis, Missouri, USA
| | - Lihua Yang
- *Department of Biomedical Engineering and Department of Medicine, Washington University, St. Louis, Missouri, USA
| | - Yizheng Tu
- *Department of Biomedical Engineering and Department of Medicine, Washington University, St. Louis, Missouri, USA
| | - Mark J Miller
- *Department of Biomedical Engineering and Department of Medicine, Washington University, St. Louis, Missouri, USA
| | - Christine T N Pham
- *Department of Biomedical Engineering and Department of Medicine, Washington University, St. Louis, Missouri, USA
| | - Samuel A Wickline
- *Department of Biomedical Engineering and Department of Medicine, Washington University, St. Louis, Missouri, USA
| | - Hua Pan
- *Department of Biomedical Engineering and Department of Medicine, Washington University, St. Louis, Missouri, USA
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14
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Zhou HF, Yan H, Pan H, Hou KK, Akk A, Springer LE, Hu Y, Allen JS, Wickline SA, Pham CTN. Peptide-siRNA nanocomplexes targeting NF-κB subunit p65 suppress nascent experimental arthritis. J Clin Invest 2014; 124:4363-74. [PMID: 25157820 DOI: 10.1172/jci75673] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Accepted: 07/03/2014] [Indexed: 12/25/2022] Open
Abstract
The NF-κB signaling pathway is implicated in various inflammatory diseases, including rheumatoid arthritis (RA); therefore, inhibition of this pathway has the potential to ameliorate an array of inflammatory diseases. Given that NF-κB signaling is critical for many immune cell functions, systemic blockade of this pathway may lead to detrimental side effects. siRNAs coupled with a safe and effective delivery nanoplatform may afford the specificity lacking in systemic administration of small-molecule inhibitors. Here we demonstrated that a melittin-derived cationic amphipathic peptide combined with siRNA targeting the p65 subunit of NF-κB (p5RHH-p65) noncovalently self-assemble into stable nanocomplexes that home to the inflamed joints in a murine model of RA. Specifically, administration of p5RHH-p65 siRNA nanocomplexes abrogated inflammatory cytokine expression and cellular influx into the joints, protected against bone erosions, and preserved cartilage integrity. The p5RHH-p65 siRNA nanocomplexes potently suppressed early inflammatory arthritis without affecting p65 expression in off-target organs or eliciting a humoral response after serial injections. These data suggest that this self-assembling, largely nontoxic platform may have broad utility for the specific delivery of siRNA to target and limit inflammatory processes for the treatment of a variety of diseases.
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