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Remy M, Upara C, Ding QJ, Miszuk JM, Sun H, Hong L. MicroRNA-200c Release from Gelatin-Coated 3D-Printed PCL Scaffolds Enhances Bone Regeneration. ACS Biomater Sci Eng 2024; 10:2337-2350. [PMID: 38531043 PMCID: PMC11005014 DOI: 10.1021/acsbiomaterials.3c01105] [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: 08/08/2023] [Revised: 02/16/2024] [Accepted: 02/20/2024] [Indexed: 03/28/2024]
Abstract
The fabrication of clinically relevant synthetic bone grafts relies on combining multiple biodegradable biomaterials to create a structure that supports the regeneration of defects while delivering osteogenic biomolecules that enhance regeneration. MicroRNA-200c (miR-200c) functions as a potent osteoinductive biomolecule to enhance osteogenic differentiation and bone formation; however, synthetic tissue-engineered bone grafts that sustain the delivery of miR-200c for bone regeneration have not yet been evaluated. In this study, we created novel, multimaterial, synthetic bone grafts from gelatin-coated 3D-printed polycaprolactone (PCL) scaffolds. We attempted to optimize the release of pDNA encoding miR-200c by varying gelatin types, concentrations, and polymer crosslinking materials to improve its functions for bone regeneration. We revealed that by modulating gelatin type, coating material concentration, and polymer crosslinking, we effectively altered the release rates of pDNA encoding miR-200c, which promoted osteogenic differentiation in vitro and bone regeneration in a critical-sized calvarial bone defect animal model. We also demonstrated that crosslinking the gelatin coatings on the PCL scaffolds with low-concentration glutaraldehyde was biocompatible and increased cell attachment. These results strongly indicate the potential use of gelatin-based systems for pDNA encoding microRNA delivery in gene therapy and further demonstrate the effectiveness of miR-200c for enhancing bone regeneration from synthetic bone grafts.
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Affiliation(s)
- Matthew
T. Remy
- Iowa
Institute for Oral Health Research, College
of Dentistry, The University of Iowa, Iowa City, Iowa 52242, United States
- Roy
J. Carver Department of Biomedical Engineering, College of Engineering, The University of Iowa, Iowa City, Iowa 52242, United States
| | - Chawin Upara
- Iowa
Institute for Oral Health Research, College
of Dentistry, The University of Iowa, Iowa City, Iowa 52242, United States
| | - Qiong J. Ding
- Iowa
Institute for Oral Health Research, College
of Dentistry, The University of Iowa, Iowa City, Iowa 52242, United States
| | - Jacob M. Miszuk
- Iowa
Institute for Oral Health Research, College
of Dentistry, The University of Iowa, Iowa City, Iowa 52242, United States
| | - Hongli Sun
- Iowa
Institute for Oral Health Research, College
of Dentistry, The University of Iowa, Iowa City, Iowa 52242, United States
| | - Liu Hong
- Iowa
Institute for Oral Health Research, College
of Dentistry, The University of Iowa, Iowa City, Iowa 52242, United States
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Chen J, Zhang RX, Xie M, Ding QJ, Li J. [Effect of plasminogen activator urokinase receptor gene on the activation and apoptosis of neutrophil]. Zhonghua Yi Xue Za Zhi 2024; 104:877-882. [PMID: 38462365 DOI: 10.3760/cma.j.cn112137-20230917-00481] [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] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
Objective: To investigate the effect of plasminogen activator urokinase receptor (PLAUR) gene on neutrophil activation and apoptosis in neutrophil-like cell model. Methods: Human acute myeloid leukemia cell line HL60 was cultured in vitro and induced to differentiate into neutrophil-like cells by all-trans retinoic acid (ATRA). Lentiviral vectors interfering with human PLAUR gene was constructed and transfected into neutrophil-like cells (siRNA group). The phosphate buffer saline (PBS) group (untransfected neutrophil-like cells) and normal blank control group (NC group) (neutrophil-like cells transfected with blank plasmid) were used as controls (n=3). After starvation culture and addition of interleukin-17 afterwards in these 3 groups, the expression of CD11b on the cell membrane was detected by flow cytometry, and the levels of myeloperoxide (MPO) and extracellular neutrophil traps (NETs) in the supernatant were detected by enzyme-linked immunosorbent assay (ELISA) to investigate the activation of neutrophil-like cells. The apoptosis was detected by flow cytometry with annexin V/propidium iodide (PI) double staining and the expressions of apoptosis-related proteins caspase-3, bax and bcl-2 were detected by Western blotting. Results: The expression of CD11b in siRNA group (32.37±8.17) was lower than that in PBS group (46.27±1.54) and NC group (53.07±8.14) (P<0.05) by flow cytometry. The levels of MPO and NETs (33.37±1.11, 57.69±3.03) in the supernatant of siRNA group were significantly lower than those in PBS group (41.64±2.20, 77.60±4.33) and NC group (40.84±5.11, 76.15±2.10) (P<0.05). Flow cytometry with annexin V/PI showed that the expression of apoptosis in siRNA group (20.42%±2.45%) was significantly higher than that in PBS group (11.91%±2.23%) and NC group (11.13%±2.56%) (P<0.05). The relative expression of caspase-3 protein and bax protein (0.84±0.05, 0.83±0.04) in siRNA group was significantly higher than that in PBS group (0.68±0.02, 0.63±0.08) and NC group (0.71±0.01, 0.66±0.10) (P<0.05), and the relative expression of anti-apoptosis protein bcl-2 decreased in siRNA group (0.38±0.02) than in PBS group (0.73±0.05) and NC group (0.69±0.06) (P<0.05). Conclusion: PLAUR promotes the activation of neutrophil-like cells and inhibits the apoptosis.
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Affiliation(s)
- J Chen
- Department of Rheumatology and Clinical Immunology, the Second Affliated Hospital of Kunming Medical University, Kunming 650101, China
| | - R X Zhang
- Department of Disease Control and Prevention, the First People's Hospital of Yunnan Province, Kunming 650101, China
| | - M Xie
- Department of Rheumatology and Clinical Immunology, the Second Affliated Hospital of Kunming Medical University, Kunming 650101, China
| | - Q J Ding
- Department of Rheumatology and Clinical Immunology, the Second Affliated Hospital of Kunming Medical University, Kunming 650101, China
| | - J Li
- Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Beijing 100730, China
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Ding QJ, Remy MT, Upara C, Hu J, Mata AVM, Haes AJ, Lanzel E, Sun H, Buchakjian MR, Hong L. CaCO 3 Nanoparticles Delivering MicroRNA-200c Suppress Oral Squamous Cell Carcinoma. bioRxiv 2023:2023.10.05.561110. [PMID: 37873146 PMCID: PMC10592969 DOI: 10.1101/2023.10.05.561110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
MicroRNA (miR)-200c suppresses the initiation and progression of oral squamous cell carcinoma (OSCC), the most prevalent head and neck cancer with high recurrence, metastasis, and mortality rates. However, miR-200c -based gene therapy to inhibit OSCC growth and metastasis has yet to be reported. To develop an miR-based gene therapy to improve the outcomes of OSCC treatment, this study investigates the feasibility of plasmid DNA encoding miR-200c delivered via non-viral CaCO 3 -based nanoparticles to inhibit OSCC tumor growth. CaCO 3 -based nanoparticles with various ratios of CaCO 3 and protamine sulfate (PS) were utilized to transfect pDNA encoding miR-200c into OSCC cells and the efficiency of these nanoparticles was evaluated. The proliferation, migration, and associated oncogene production, as well as in vivo tumor growth for OSCC cells overexpressing miR-200c were also quantified. It was observed that, while CaCO 3 -based nanoparticles improve transfection efficiencies of pDNA miR-200c , the ratio of CaCO 3 to PS significantly influences the transfection efficiency. Overexpression of miR-200c significantly reduced proliferation, migration, and oncogene expression of OSCC cells, as well as the tumor size of cell line-derived xenografts (CDX) in mice. In addition, a local administration of pDNA miR-200c using CaCO 3 delivery significantly enhanced miR-200c transfection and suppressed tumor growth of CDX in mice. These results strongly indicate that the nanocomplexes of CaCO 3 /pDNA miR-200c may potentially be used to reduce oral cancer recurrence and metastasis and improve clinical outcomes in OSCC treatment. (227 words).
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Gramlich OW, Ding QJ, Zhu W, Cook A, Anderson MG, Kuehn MH. Adoptive transfer of immune cells from glaucomatous mice provokes retinal ganglion cell loss in recipients. Acta Neuropathol Commun 2015; 3:56. [PMID: 26374513 PMCID: PMC4591529 DOI: 10.1186/s40478-015-0234-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [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: 08/21/2015] [Accepted: 08/21/2015] [Indexed: 12/02/2022] Open
Abstract
INTRODUCTION Several studies have indicated that autoimmune and neuroinflammatory processes contribute to the neurodegeneration of retinal ganglion cells in human glaucoma patients and in animal models. To test the involvement of cellular immune processes in the pathophysiology of retinal ganglion cell degeneration in vivo, we carried out adoptive transfer experiments from two independent genetic mouse models of glaucoma into normal recipient mice. RESULTS Our findings indicate that transfer results in a progressive loss of retinal ganglion cells and their axons despite normal intraocular pressure in recipient mice. Signs of pan-retinal inflammation were not detected. Similar findings were obtained following transfer of isolated T-lymphocytes, but not after transfer of splenocytes from immune deficient glaucomatous mice. Transferred lymphocytes were detected integrated in the spleen and in the retinal ganglion cell layer of recipient animals, albeit at very low frequencies. Furthermore, we observed cell-cell interaction between transferred T-cells and recipient microglia along with focal microglial activation in recipient eyes. CONCLUSION This study demonstrates that the pathophysiology of glaucomatous degeneration in the tested animal models includes T-cell mediated events that are capable of causing loss of healthy retinal ganglion cells.
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Affiliation(s)
- Oliver W Gramlich
- Department of Ophthalmology and Visual Sciences, The University of Iowa, Iowa City, 52242, IA, USA
- Center for the Prevention and Treatment of Visual Loss, Iowa City VA Health Care System, 3135C MERF, 375 Newton Road, Iowa City, IA, 52242, USA
| | - Qiong J Ding
- Department of Ophthalmology and Visual Sciences, The University of Iowa, Iowa City, 52242, IA, USA
| | - Wei Zhu
- Department of Ophthalmology and Visual Sciences, The University of Iowa, Iowa City, 52242, IA, USA
| | - Amy Cook
- Department of Ophthalmology and Visual Sciences, The University of Iowa, Iowa City, 52242, IA, USA
| | - Michael G Anderson
- Department of Ophthalmology and Visual Sciences, The University of Iowa, Iowa City, 52242, IA, USA
- Center for the Prevention and Treatment of Visual Loss, Iowa City VA Health Care System, 3135C MERF, 375 Newton Road, Iowa City, IA, 52242, USA
- Department of Molecular Physiology and Biophysics, The University of Iowa, Iowa City, 52242, IA, USA
| | - Markus H Kuehn
- Department of Ophthalmology and Visual Sciences, The University of Iowa, Iowa City, 52242, IA, USA.
- Center for the Prevention and Treatment of Visual Loss, Iowa City VA Health Care System, 3135C MERF, 375 Newton Road, Iowa City, IA, 52242, USA.
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Ding QJ, Zhu W, Cook AC, Anfinson KR, Tucker BA, Kuehn MH. Induction of trabecular meshwork cells from induced pluripotent stem cells. Invest Ophthalmol Vis Sci 2014; 55:7065-72. [PMID: 25298418 DOI: 10.1167/iovs.14-14800] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [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: 11/24/2022] Open
Abstract
PURPOSE Loss or dysfunction of trabecular meshwork (TM) cells has been associated with the development of pathologically elevated IOP, and it is conceivable that replacement of damaged TM cells could restore function to the TM. We propose that the use of TM-like cells derived from induced pluripotent stem cells (iPSCs) created from a patient's own dermal fibroblasts offers the best solution to this challenge. Here we demonstrate that mouse iPSCs can be induced to differentiate into TM-like cells suitable for autologous transplantation. METHODS Directed induction of stem cell differentiation was achieved through coculture of mouse iPSCs with human TM cells for up to 21 days. The resultant TM-like cells (iPSC-TM) were characterized morphologically, immunohistochemically, and functionally. RESULTS The iPSC-TM cells closely resembled cultured human TM cells morphologically and began to express many markers of TM cells while ceasing to express pluripotency markers such as Nanog, Oct4, and Sox2. Functionally, these cells developed the ability to phagocytose particles. Finally, exposure to dexamethasone or phorbol 12-myristate acetate caused a distinct increase in the production and secretion of myocilin and matrix metalloproteinase-3, respectively, behavior characteristic of TM cells. CONCLUSIONS Our data demonstrate that iPSCs can be induced to assume a phenotype that resembles native TM cells in many important aspects. Not only do these cells represent a valuable research tool, but transplantation into glaucomatous eyes with elevated IOP may also restore function to the TM, resulting in re-establishment of IOP.
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Affiliation(s)
- Qiong J Ding
- The Stephen A. Wynn Institute for Vision Research, Department of Ophthalmology and Visual Sciences, University of Iowa, Iowa City, Iowa, United States
| | - Wei Zhu
- The Stephen A. Wynn Institute for Vision Research, Department of Ophthalmology and Visual Sciences, University of Iowa, Iowa City, Iowa, United States
| | - Amy C Cook
- The Stephen A. Wynn Institute for Vision Research, Department of Ophthalmology and Visual Sciences, University of Iowa, Iowa City, Iowa, United States
| | - Kristin R Anfinson
- The Stephen A. Wynn Institute for Vision Research, Department of Ophthalmology and Visual Sciences, University of Iowa, Iowa City, Iowa, United States
| | - Budd A Tucker
- The Stephen A. Wynn Institute for Vision Research, Department of Ophthalmology and Visual Sciences, University of Iowa, Iowa City, Iowa, United States
| | - Markus H Kuehn
- The Stephen A. Wynn Institute for Vision Research, Department of Ophthalmology and Visual Sciences, University of Iowa, Iowa City, Iowa, United States
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Ding QJ, Cook AC, Dumitrescu AV, Kuehn MH. Lack of Immunoglobulins Does Not Prevent C1q Binding to RGC and Does Not Alter the Progression of Experimental Glaucoma. ACTA ACUST UNITED AC 2012; 53:6370-7. [DOI: 10.1167/iovs.12-10442] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Qiong J. Ding
- From the Department of Ophthalmology and Visual Sciences, The University of Iowa, Iowa City, Iowa; and the
| | - Amy C. Cook
- From the Department of Ophthalmology and Visual Sciences, The University of Iowa, Iowa City, Iowa; and the
| | - Alina V. Dumitrescu
- From the Department of Ophthalmology and Visual Sciences, The University of Iowa, Iowa City, Iowa; and the2Department of Ophthalmology, University of Kansas Medical Center, Kansas City, Kansas
| | - Markus H. Kuehn
- From the Department of Ophthalmology and Visual Sciences, The University of Iowa, Iowa City, Iowa; and the
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Abstract
BACKGROUND The suicide rate in China is estimated to be around three times the global average, with women in the 15- to 24-year-old age group particularly vulnerable. Despite this, there is a dearth of information on the prevalence and predictors of depression and suicide ideation in Chinese adolescents. The specific aims of the study were, therefore, to quantify the rates and severity of self-reported depression and suicide ideation in middle-school students, to examine the relationship between depression and attempted suicide, and to identify socio-demographic associations. METHODS A cross-sectional survey using self-completion questionnaires was carried out in six middle schools (predominant age range 13-17 years) in an urban and a rural setting in Zhejiang Province in eastern China. RESULTS There were 1,576 completed questionnaires. One-third of the students had suffered symptoms of severe depression, with 16 % admitting to suicide ideation and 9 % to actually having attempted suicide. Factors independently associated with severe depression were female gender, poor self-reported academic performance and rural residence. Similar factors were associated with suicide ideation and attempted suicide. Depression was less common in those without siblings. Patterns of help-seeking showed reliance on friends and parents, with very low levels of professional help-seeking (around 1 %) and 30 % having sought no help from any source for psychological problems. CONCLUSION The results of the study contributed to service developments and the addition of psychological issues to the school health education curriculum.
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Affiliation(s)
- T Hesketh
- Centre for International Child Health, Institute of Child Health, University College London, UK.
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Abstract
OBJECTIVES To inform a prevention strategy, this study determined the prevalence of and attitudes toward smoking among Chinese secondary school students. METHODS Self-completion questionnaires were administered to 13- to 18-year-olds attending school in Zhejiang Province, eastern China. RESULTS Of the 6674 respondents, 15.9% (25.7% of the boys, 5.4% of the girls) were ever smokers. Only 0.3% were regular smokers. Of the ever smokers, 41.9% had smoked before 10 years of age and 7.9% before 5 years of age. Parental smoking was the strongest predictor of smoking. CONCLUSIONS The very low prevalence of regular smoking found in this age group suggests that prevention programs in school may be beneficial. Parents should be encouraged to adopt more responsible attitudes toward smoking in the home.
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Affiliation(s)
- T Hesketh
- Centre for International Child Health, Institute of Child Health, University College London, London, England.
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Hesketh T, Ding QJ. Standard definition of child overweight and obesity worldwide. Young Chinese people in Hong Kong are not representative of those in China. BMJ 2000; 321:1158-9. [PMID: 11203227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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Chen ZP, Yan YP, Ding QJ, Knapp S, Potenza JA, Schugar HJ, Chen KY. Effects of inhibitors of deoxyhypusine synthase on the differentiation of mouse neuroblastoma and erythroleukemia cells. Cancer Lett 1996; 105:233-9. [PMID: 8697449 DOI: 10.1016/0304-3835(96)04287-5] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.6] [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: 02/01/2023]
Abstract
Deoxyhpusine synthase catalyzes the conversion of lysine to deoxyhypusine residue on the eukaryotic initiation factor 5A (eIF-5A) precursor using spermidine as the substrate. Subsequent hydroxylation of the deoxyhypusine residue completes hypusine formation on eIF-5A. Polyamines (putrescine, spermidine, and spermine) have been implicated in tumor growth and differentiation. Because deoxyhypusine/hypusine formation is one of the most specific polyamine-dependent biochemical events, we decided to use N1-guanyl-1,7-diaminoheptane (GC7), a potent inhibitor for deoxyhypusine synthase, to assess the role of hypusine formation on tumor growth and differentiation. GC7 suppressed the growth of N2a mouse neuroblastoma cells and DS19 murine erythroleukemia cells at micromolar concentrations. However, within a narrow concentration range, GC7 could promote the differentiation of mouse neuroblastoma cells in the presence of suboptimal amount of dibutyryl cAMP. In contrast, GC7 blocked the differentiation of DS19 cells induced with hexamethylene bisacetamide. Polyamine depletion by difluoromethyl ornithine (DFMO) has previously been shown to promote differentiation of neuroblastoma cells but inhibits erythrodifferentiation. Since our studies demonstrated that GC7 mimics the action of DFMO on tumor differentiation, it is likely that the effect of DFMO on tumor differentiation is mediated by hypusine formation and that GC7 represents a more specific inhibitor that can alter the differentiation program in certain tumor cells.
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Affiliation(s)
- Z P Chen
- Department of Chemistry, State University of New Jersey, Piscataway 08855-0939, USA
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