1
|
Packer J, Gubieda AG, Brooks A, Deutz LN, Squires I, Ellison S, Schneider C, Naganathan SR, Wollman AJ, Dickinson DJ, Rodriguez J. Atypical Protein Kinase C Promotes its own Asymmetric Localisation by Phosphorylating Cdc42 in the C. elegans zygote. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.10.27.563985. [PMID: 38009101 PMCID: PMC10675845 DOI: 10.1101/2023.10.27.563985] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/28/2023]
Abstract
Atypical protein kinase C (aPKC) is a major regulator of cell polarity. Acting in conjunction with Par6, Par3 and the small GTPase Cdc42, aPKC becomes asymmetrically localised and drives the polarisation of cells. aPKC activity is crucial for its own asymmetric localisation, suggesting a hitherto unknown feedback mechanism contributing to polarisation. Here we show in the C. elegans zygote that the feedback relies on aPKC phosphorylation of Cdc42 at serine 71. The turnover of CDC-42 phosphorylation ensures optimal aPKC asymmetry and activity throughout polarisation by tuning Par6/aPKC association with Par3 and Cdc42. Moreover, turnover of Cdc42 phosphorylation regulates actomyosin cortex dynamics that are known to drive aPKC asymmetry. Given the widespread role of aPKC and Cdc42 in cell polarity, this form of self-regulation of aPKC may be vital for the robust control of polarisation in many cell types.
Collapse
Affiliation(s)
- John Packer
- Newcastle University Biosciences Institute, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK
- These authors contributed equally
| | - Alicia G. Gubieda
- Newcastle University Biosciences Institute, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK
- These authors contributed equally
| | - Aaron Brooks
- Newcastle University Biosciences Institute, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK
- These authors contributed equally
| | - Lars N. Deutz
- Department of Molecular Biosciences, University of Texas at Austin, Austin, Texas, USA
- These authors contributed equally
| | - Iolo Squires
- Newcastle University Biosciences Institute, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK
- These authors contributed equally
| | | | | | - Sundar Ram Naganathan
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai 400005, India
| | - Adam J.M. Wollman
- Newcastle University Biosciences Institute, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK
| | - Daniel J. Dickinson
- Department of Molecular Biosciences, University of Texas at Austin, Austin, Texas, USA
| | - Josana Rodriguez
- Newcastle University Biosciences Institute, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK
- Lead contact
| |
Collapse
|
2
|
Zhang D, Gu J, Xu Y, Yu X, Jin H. Exploring the mechanism of Huanglian ointment in alleviating wound healing after anal fistula surgery through metabolomics and proteomics. Heliyon 2024; 10:e29809. [PMID: 38699024 PMCID: PMC11064137 DOI: 10.1016/j.heliyon.2024.e29809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 03/23/2024] [Accepted: 04/15/2024] [Indexed: 05/05/2024] Open
Abstract
Anal fistula is a common anal and intestinal disease. The wound of anal fistula surgery is open and polluting, which is the most difficult to heal among all surgical incisions. To investigate the mechanism of Huanglian ointment (HLO) on wound healing after anal fistula incision. The S. aureus infected wound in SD rats were used to imitate poor healing wound after anal fistula surgery. SD rats with wound sites (n = 24) were randomly divided into four groups (Control group, Model group, Potassium permanganate (PP) treatment group, and HLO treatment group). The wound healing rate was evaluated, HE staining was used to evaluate the pathological changes of each group, ELISA was used to detect the secretion of inflammatory factors in each group, and the mechanism was explored through metabolomics and proteomics in plasma rat. Compared to other groups, the rate of wound healing in the HLO group was higher on days 7 and 14. Histological analysis showed that collagen and fibroblast in HLO rats were significantly increased, inflammatory cells were reduced, and vascular endothelial permeability was increased. ELISA results showed that the secretion of inflammatory factors in HLO rats was significantly lower. Significant proteins and metabolites were identified in the wound tissues of the infected rats and HLO-treated rats, which were mainly attributed to Cdc42, Ctnnb1, Actr2, Actr3, Arpc1b, Itgam, Itgb2, Cttn, Linoleic acid metabolism, d-Glutamine and d-glutamate metabolism, Phenylalanine, tyrosine and tryptophan biosynthesis, Phenylalanine metabolism, alpha-Linolenic acid metabolism, and Ascorbate and aldarate metabolism. In conclusion, this study showed that HLO can promote S. aureus infected wound healing, and the data provide a theoretical basis for the treatment of wounds after anal fistula surgery with HLO.
Collapse
Affiliation(s)
- Dongliang Zhang
- Nanjing University of Chinese Medicine, Nanjing, 210023, China
- Department of Colorectal and Anal Surgery, Zhenjiang Hospital Affiliated to Nanjing University of Chinese Medicine (Zhenjiang Hospital of Traditional Chinese Medicine), Zhenjiang, 212001, China
| | - Jiabo Gu
- Nanjing University of Chinese Medicine, Nanjing, 210023, China
- Department of Colorectal and Anal Surgery, The Second Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, 210011, China
| | - Yanyan Xu
- Department of Colorectal and Anal Surgery, The Second Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, 210011, China
| | - Xiaowen Yu
- Department of Colorectal and Anal Surgery, Zhenjiang Hospital Affiliated to Nanjing University of Chinese Medicine (Zhenjiang Hospital of Traditional Chinese Medicine), Zhenjiang, 212001, China
| | - Heiying Jin
- Department of Colorectal and Anal Surgery, The Second Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, 210011, China
| |
Collapse
|
3
|
Fu X, Xu M, Yu Z, Gu W, Zhang Z, Zhang B, Wang X, Su Z, Zhang C. Staphylococcal Enterotoxin C2 Mutant-Induced Antitumor Immune Response Is Controlled by CDC42/MLC2-Mediated Tumor Cell Stiffness. Int J Mol Sci 2023; 24:11796. [PMID: 37511553 PMCID: PMC10380429 DOI: 10.3390/ijms241411796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 07/03/2023] [Accepted: 07/20/2023] [Indexed: 07/30/2023] Open
Abstract
As a biological macromolecule, the superantigen staphylococcal enterotoxin C2 (SEC2) is one of the most potent known T-cell activators, and it induces massive cytotoxic granule production. With this property, SEC2 and its mutants are widely regarded as immunomodulating agents for cancer therapy. In a previous study, we constructed an MHC-II-independent mutant of SEC2, named ST-4, which exhibits enhanced immunocyte stimulation and antitumor activity. However, tumor cells have different degrees of sensitivity to SEC2/ST-4. The mechanisms of immune resistance to SEs in cancer cells have not been investigated. Herein, we show that ST-4 could activate more powerful human lymphocyte granule-based cytotoxicity than SEC2. The results of RNA-seq and atomic force microscopy (AFM) analysis showed that, compared with SKOV3 cells, the softer ES-2 cells could escape from SEC2/ST-4-induced cytotoxic T-cell-mediated apoptosis by regulating cell softness through the CDC42/MLC2 pathway. Conversely, after enhancing the stiffness of cancer cells by a nonmuscle myosin-II-specific inhibitor, SEC2/ST-4 exhibited a significant antitumor effect against ES-2 cells by promoting perforin-dependent apoptosis and the S-phase arrest. Taken together, these data suggest that cell stiffness could be a key factor of resistance to SEs in ovarian cancer, and our findings may provide new insight for SE-based tumor immunotherapy.
Collapse
Affiliation(s)
- Xuanhe Fu
- Institute of Applied Ecology, Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang 110016, China
- Department of Immunology, Shenyang Medical College, No. 146 Huanghe North Street, Shenyang 110034, China
- Key Laboratory of Superantigen Research of Liao Ning Province, Shenyang 110016, China
| | - Mingkai Xu
- Institute of Applied Ecology, Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang 110016, China
- Key Laboratory of Superantigen Research of Liao Ning Province, Shenyang 110016, China
| | - Zhixiong Yu
- Department of Immunology, Shenyang Medical College, No. 146 Huanghe North Street, Shenyang 110034, China
| | - Wu Gu
- Institute of Applied Ecology, Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang 110016, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhichun Zhang
- Institute of Applied Ecology, Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang 110016, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Bowen Zhang
- Institute of Applied Ecology, Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang 110016, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiujuan Wang
- Institute of Applied Ecology, Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang 110016, China
- Key Laboratory of Superantigen Research of Liao Ning Province, Shenyang 110016, China
| | - Zhencheng Su
- Institute of Applied Ecology, Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang 110016, China
- Key Laboratory of Superantigen Research of Liao Ning Province, Shenyang 110016, China
| | - Chenggang Zhang
- Institute of Applied Ecology, Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang 110016, China
- Key Laboratory of Superantigen Research of Liao Ning Province, Shenyang 110016, China
| |
Collapse
|
4
|
McDaniels JM, Shetty AC, Rousselle TV, Bardhi E, Maluf DG, Mas VR. The cellular landscape of the normal kidney allograft: Main players balancing the alloimmune response. FRONTIERS IN TRANSPLANTATION 2022; 1:988238. [PMID: 38994377 PMCID: PMC11235379 DOI: 10.3389/frtra.2022.988238] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 09/22/2022] [Indexed: 07/13/2024]
Abstract
Despite recent advances made in short-term outcomes; minimal improvements have been observed in long-term kidney transplantation outcomes. Due to an imbalance between organ transplant availability and patient waiting list, expanding kidney allograft longevity is a critical need in the field. Prior studies have either focused on early ischemic and immunological conditions affecting kidney allografts (e.g., delayed graft function, acute rejection) or late stage chronic injury when interventions are no longer feasible. However, studies characterizing kidney allografts with normal function by its cellular distribution, cell-cell interactions, and associated molecular pathways are lacking. Herein, we used single nuclei RNA-sequencing to uncover the cellular landscape and transcriptome of the normal kidney allograft. We profiled 40,950 nuclei from seven human kidney biopsies (normal native, N = 3; normal allograft, N = 4); normal allograft protocol biopsies were collected ≥15-months post-transplant. A total of 17 distinct cell clusters were identified with proximal tubules (25.70 and 21.01%), distal tubules (15.22 and 18.20%), and endothelial cells (EC) (4.26 and 9.94%) constituting the major cell populations of normal native and normal allograft kidneys, respectively. A large proportion of cycling cells from normal native kidneys were in G1-phase (43.96%) whereas cells from normal allograft were predominantly in S-phase (32.69%). This result suggests that transcriptional differences between normal native and normal allograft biopsies are dependent on the new host environment, immunosuppression, and injury-affliction. In the normal allograft, EC-specific genes upregulated metabolism, the immune response, and cellular growth, emphasizing their role in maintaining homeostasis during the ongoing alloreactive stress response. Immune cells, including B (2.81%), macrophages (24.96%), monocytes (15.29%), natural killer (NK) (12.83%), neutrophils (8.44%), and T cells (14.41%, were increased in normal allografts despite lack of histological or clinical evidence of acute rejection. Phenotypic characterization of immune cell markers supported lymphocyte activation and proinflammatory cytokines signaling pathways (i.e., IL-15, IL-32). The activation of B, NK, and T cells reveals potential immune cells underlying subclinical inflammation and repair. These single nuclei analyses provide novel insights into kidney and immune cell associated signaling pathways that portray kidney grafts with normal allograft function beyond 2-years post-transplant, revealing a novel perspective in understanding long-term allograft graft survival.
Collapse
Affiliation(s)
- Jennifer M McDaniels
- Surgical Sciences Division, Department of Surgery, University of Maryland, Baltimore, MD, United States
| | - Amol C Shetty
- Institute for Genome Sciences, School of Medicine, University of Maryland, Baltimore, MD, United States
| | - Thomas V Rousselle
- Surgical Sciences Division, Department of Surgery, University of Maryland, Baltimore, MD, United States
| | - Elissa Bardhi
- Surgical Sciences Division, Department of Surgery, University of Maryland, Baltimore, MD, United States
| | - Daniel G Maluf
- Program in Transplantation, School of Medicine, University of Maryland, Baltimore, MD, United States
| | - Valeria R Mas
- Surgical Sciences Division, Department of Surgery, University of Maryland, Baltimore, MD, United States
| |
Collapse
|
5
|
Sun X, Song W, Teng L, Huang Y, Liu J, Peng Y, Lu X, Yuan J, Zhao X, Zhao Q, Xu Y, Shen J, Peng X, Ren L. MiRNA 24-3p-rich exosomes functionalized DEGMA-modified hyaluronic acid hydrogels for corneal epithelial healing. Bioact Mater 2022; 25:640-656. [PMID: 37056274 PMCID: PMC10086767 DOI: 10.1016/j.bioactmat.2022.07.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 07/07/2022] [Accepted: 07/09/2022] [Indexed: 11/02/2022] Open
Abstract
The damage of corneal epithelium may lead to the formation of irreversible corneal opacities and even blindness. The migration rate of corneal epithelial cells directly affects corneal repair. Here, we explored ocu-microRNA 24-3p (miRNA 24-3p) that can promote rabbit corneal epithelial cells migration and cornea repair. Exosomes, an excellent transport carrier, were exacted from adipose derived mesenchymal stem cells for loading with miRNA 24-3p to prepare miRNA 24-3p-rich exosomes (Exos-miRNA 24-3p). It can accelerate corneal epithelial migration in vitro and in vivo. For application in cornea alkali burns, we further modified hyaluronic acid with di(ethylene glycol) monomethyl ether methacrylate (DEGMA) to obtain a thermosensitive hydrogel, also reported a thermosensitive DEGMA-modified hyaluronic acid hydrogel (THH) for the controlled release of Exos-miRNA 24-3p. It formed a highly uniform and clear thin layer on the ocular surface to resist clearance from blinking and extended the drug-ocular-epithelium contact time. The use of THH-3/Exos-miRNA 24-3p for 28 days after alkali burn injury accelerated corneal epithelial defect healing and epithelial maturation. It also reduced corneal stromal fibrosis and macrophage activation. MiRNA 24-3p-rich exosomes functionalized DEGMA-modified hyaluronic acid hydrogel as a multilevel delivery strategy has a potential use for cell-free therapy of corneal epithelial regeneration.
Collapse
|
6
|
Compagnoni C, Zelli V, Bianchi A, Di Marco A, Capelli R, Vecchiotti D, Brandolini L, Cimini AM, Zazzeroni F, Allegretti M, Alesse E, Tessitore A. MicroRNAs Expression in Response to rhNGF in Epithelial Corneal Cells: Focus on Neurotrophin Signaling Pathway. Int J Mol Sci 2022; 23:ijms23073597. [PMID: 35408969 PMCID: PMC8998691 DOI: 10.3390/ijms23073597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/21/2022] [Accepted: 03/21/2022] [Indexed: 11/16/2022] Open
Abstract
PURPOSE Nerve growth factor efficacy was demonstrated for corneal lesions treatment, and recombinant human NGF (rhNGF) was approved for neurotrophic keratitis therapy. However, NGF-induced molecular responses in cornea are still largely unknown. We analyzed microRNAs expression in human epithelial corneal cells after time-dependent rhNGF treatment. METHODS Nearly 700 microRNAs were analyzed by qRT-PCR. MicroRNAs showing significant expression differences were examined by DIANA-miRpath v.3.0 to identify target genes and pathways. Immunoblots were performed to preliminarily assess the strength of the in silico results. RESULTS Twenty-one microRNAs (miR-26a-1-3p, miR-30d-3p, miR-27b-5p, miR-146a-5p, miR-362-5p, mir-550a-5p, mir-34a-3p, mir-1227-3p, mir-27a-5p, mir-222-5p, mir-151a-5p, miR-449a, let7c-5p, miR-337-5p, mir-29b-3p, miR-200b-3p, miR-141-3p, miR-671-3p, miR-324-5p, mir-411-3p, and mir-425-3p) were significantly regulated in response to rhNGF. In silico analysis evidenced interesting target genes and pathways, including that of neurotrophin, when analyzed in depth. Almost 80 unique target genes (e.g., PI3K, AKT, MAPK, KRAS, BRAF, RhoA, Cdc42, Rac1, Bax, Bcl2, FasL) were identified as being among those most involved in neurotrophin signaling and in controlling cell proliferation, growth, and apoptosis. AKT and RhoA immunoblots demonstrated congruence with microRNA expression, providing preliminary validation of in silico data. CONCLUSIONS MicroRNA levels in response to rhNGF were for the first time analyzed in corneal cells. Novel insights about microRNAs, target genes, pathways modulation, and possible biological responses were provided. Importantly, given the putative role of microRNAs as biomarkers or therapeutic targets, our results make available data which might be potentially exploitable for clinical applications.
Collapse
Affiliation(s)
- Chiara Compagnoni
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, Via Vetoio, 67100 L’Aquila, Italy; (C.C.); (V.Z.); (R.C.); (D.V.); (F.Z.); (E.A.)
| | - Veronica Zelli
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, Via Vetoio, 67100 L’Aquila, Italy; (C.C.); (V.Z.); (R.C.); (D.V.); (F.Z.); (E.A.)
- Center for Molecular Diagnostics and Advanced Therapies, University of L’Aquila, Via Petrini, 67100 L’Aquila, Italy
| | - Andrea Bianchi
- Department of Information Engineering, Computer Science and Mathematics, University of L’Aquila, Via Vetoio, 67100 L’Aquila, Italy; (A.B.); (A.D.M.)
| | - Antinisca Di Marco
- Department of Information Engineering, Computer Science and Mathematics, University of L’Aquila, Via Vetoio, 67100 L’Aquila, Italy; (A.B.); (A.D.M.)
| | - Roberta Capelli
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, Via Vetoio, 67100 L’Aquila, Italy; (C.C.); (V.Z.); (R.C.); (D.V.); (F.Z.); (E.A.)
| | - Davide Vecchiotti
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, Via Vetoio, 67100 L’Aquila, Italy; (C.C.); (V.Z.); (R.C.); (D.V.); (F.Z.); (E.A.)
- Center for Molecular Diagnostics and Advanced Therapies, University of L’Aquila, Via Petrini, 67100 L’Aquila, Italy
| | - Laura Brandolini
- Dompé Farmaceutici Spa, via Campo di Pile, 1, 67100 L’Aquila, Italy; (L.B.); (M.A.)
| | - Anna Maria Cimini
- Department of Life, Health and Environmental Sciences, University of L’Aquila, P.zza S. Tommasi, 67100 L’Aquila, Italy;
| | - Francesca Zazzeroni
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, Via Vetoio, 67100 L’Aquila, Italy; (C.C.); (V.Z.); (R.C.); (D.V.); (F.Z.); (E.A.)
| | - Marcello Allegretti
- Dompé Farmaceutici Spa, via Campo di Pile, 1, 67100 L’Aquila, Italy; (L.B.); (M.A.)
| | - Edoardo Alesse
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, Via Vetoio, 67100 L’Aquila, Italy; (C.C.); (V.Z.); (R.C.); (D.V.); (F.Z.); (E.A.)
| | - Alessandra Tessitore
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, Via Vetoio, 67100 L’Aquila, Italy; (C.C.); (V.Z.); (R.C.); (D.V.); (F.Z.); (E.A.)
- Center for Molecular Diagnostics and Advanced Therapies, University of L’Aquila, Via Petrini, 67100 L’Aquila, Italy
- Correspondence: ; Tel.: +39-086-243-3518; Fax: +39-0862433131
| |
Collapse
|
7
|
Matera DL, Lee AT, Hiraki HL, Baker BM. The Role of Rho GTPases During Fibroblast Spreading, Migration, and Myofibroblast Differentiation in 3D Synthetic Fibrous Matrices. Cell Mol Bioeng 2021; 14:381-396. [PMID: 34777599 DOI: 10.1007/s12195-021-00698-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 08/09/2021] [Indexed: 10/20/2022] Open
Abstract
Introduction Connective tissue repair and mechanosensing are tightly entwined in vivo and occur within a complex three-dimensional (3D), fibrous extracellular matrix (ECM). Typically driven by activated fibroblasts, wound repair involves well-defined steps of cell spreading, migration, proliferation, and fibrous ECM deposition. While the role of Rho GTPases in regulating these processes has been explored extensively in two-dimensional cell culture models, much less is known about their role in more physiologic, 3D environments. Methods We employed a 3D, fibrous and protease-sensitive hydrogel model of interstitial ECM to study the interplay between Rho GTPases and fibrous matrix cues in fibroblasts during wound healing. Results Modulating fiber density within protease-sensitive hydrogels, we confirmed previous findings that heightened fiber density promotes fibroblast spreading and proliferation. The presence of matrix fibers furthermore corresponded to increased cell migration speeds and macroscopic hydrogel contraction arising from fibroblast generated forces. During fibroblast spreading, Rac1 and RhoA GTPase activity proved crucial for fiber-mediated cell spreading and contact guidance along matrix fibers, while Cdc42 was dispensable. In contrast, interplay between RhoA, Rac1, and Cdc42 contributed to fiber-mediated myofibroblast differentiation and matrix contraction over longer time scales. Conclusion These observations may provide insights into tissue repair processes in vivo and motivate the incorporation of cell-adhesive fibers within synthetic hydrogels for material-guided wound repair strategies. Supplementary Information The online version contains supplementary material available at 10.1007/s12195-021-00698-5.
Collapse
Affiliation(s)
- Daniel L Matera
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109 USA
| | - Alexander T Lee
- Department of Biology, University of Michigan, Ann Arbor, MI 48109 USA
| | - Harrison L Hiraki
- Department of Biomedical Engineering, University of Michigan, 2174 Lurie BME Building, 1101 Beal Avenue, Ann Arbor, MI 48109 USA
| | - Brendon M Baker
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109 USA.,Department of Biomedical Engineering, University of Michigan, 2174 Lurie BME Building, 1101 Beal Avenue, Ann Arbor, MI 48109 USA
| |
Collapse
|
8
|
Jozic I, Abujamra BA, Elliott MH, Wikramanayake TC, Marjanovic J, Stone RC, Head CR, Pastar I, Kirsner RS, Andreopoulos FM, Musi JP, Tomic-Canic M. Glucocorticoid-mediated induction of caveolin-1 disrupts cytoskeletal organization, inhibits cell migration and re-epithelialization of non-healing wounds. Commun Biol 2021; 4:757. [PMID: 34145387 PMCID: PMC8213848 DOI: 10.1038/s42003-021-02298-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 05/28/2021] [Indexed: 12/17/2022] Open
Abstract
Although impaired keratinocyte migration is a recognized hallmark of chronic wounds, the molecular mechanisms underpinning impaired cell movement are poorly understood. Here, we demonstrate that both diabetic foot ulcers (DFUs) and venous leg ulcers (VLUs) exhibit global deregulation of cytoskeletal organization in genomic comparison to normal skin and acute wounds. Interestingly, we found that DFUs and VLUs exhibited downregulation of ArhGAP35, which serves both as an inactivator of RhoA and as a glucocorticoid repressor. Since chronic wounds exhibit elevated levels of cortisol and caveolin-1 (Cav1), we posited that observed elevation of Cav1 expression may contribute to impaired actin-cytoskeletal signaling, manifesting in aberrant keratinocyte migration. We showed that Cav1 indeed antagonizes ArhGAP35, resulting in increased activation of RhoA and diminished activation of Cdc42, which can be rescued by Cav1 disruption. Furthermore, we demonstrate that both inducible keratinocyte specific Cav1 knockout mice, and MβCD treated diabetic mice, exhibit accelerated wound closure. Taken together, our findings provide a previously unreported mechanism by which Cav1-mediated cytoskeletal organization prevents wound closure in patients with chronic wounds.
Collapse
Affiliation(s)
- Ivan Jozic
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA.
| | - Beatriz Abdo Abujamra
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Michael H Elliott
- Departments of Ophthalmology, Physiology, and Oklahoma Center for Neuroscience, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Tongyu C Wikramanayake
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Jelena Marjanovic
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Rivka C Stone
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Cheyanne R Head
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Irena Pastar
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Robert S Kirsner
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Fotios M Andreopoulos
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL, USA
- Department of Surgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Juan P Musi
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL, USA
| | - Marjana Tomic-Canic
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA.
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA.
| |
Collapse
|
9
|
Jedrzejczak-Silicka M, Kordas M, Konopacki M, Rakoczy R. Modulation of Cellular Response to Different Parameters of the Rotating Magnetic Field (RMF)-An In Vitro Wound Healing Study. Int J Mol Sci 2021; 22:5785. [PMID: 34071384 PMCID: PMC8199476 DOI: 10.3390/ijms22115785] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/24/2021] [Accepted: 05/24/2021] [Indexed: 12/23/2022] Open
Abstract
Since the effect of MFs (magnetic fields) on various biological systems has been studied, different results have been obtained from an insignificant effect of weak MFs on the disruption of the circadian clock system. On the other hand, magnetic fields, electromagnetic fields, or electric fields are used in medicine. The presented study was conducted to determine whether a low-frequency RMF (rotating magnetic field) with different field parameters could evoke the cellular response in vitro and is possible to modulate the cellular response. The cellular metabolic activity, ROS and Ca2+ concentration levels, wound healing assay, and gene expression analyses were conducted to evaluate the effect of RMF. It was shown that different values of magnetic induction (B) and frequency (f) of RMF evoke a different response of cells, e.g., increase in the general metabolic activity may be associated with the increasing of ROS levels. The lower intracellular Ca2+ concentration (for 50 Hz) evoked the inability of cells to wound closure. It can be stated that the subtle balance in the ROS level is crucial in the wound for the effective healing process, and it is possible to modulate the cellular response to the RMF in the context of an in vitro wound healing.
Collapse
Affiliation(s)
- Magdalena Jedrzejczak-Silicka
- Laboratory of Cytogenetics, West Pomeranian University of Technology in Szczecin, Klemensa Janickiego 29, 71-270 Szczecin, Poland;
| | - Marian Kordas
- Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastow Avenue 42, 71-065 Szczecin, Poland; (M.K.); (M.K.)
| | - Maciej Konopacki
- Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastow Avenue 42, 71-065 Szczecin, Poland; (M.K.); (M.K.)
| | - Rafał Rakoczy
- Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastow Avenue 42, 71-065 Szczecin, Poland; (M.K.); (M.K.)
| |
Collapse
|
10
|
Raza A, Schulz BL, Nouwens A, Jackson LA, Piper EK, James P, Jonsson NN, Tabor AE. Serum proteomes of Santa Gertrudis cattle before and after infestation with Rhipicephalus australis ticks. Parasite Immunol 2021; 43:e12836. [PMID: 33843060 DOI: 10.1111/pim.12836] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 03/05/2021] [Accepted: 03/08/2021] [Indexed: 01/22/2023]
Abstract
Previous studies have applied genomics and transcriptomics to identify immune and genetic markers as key indicator traits for cattle tick susceptibility/resistance; however, results differed between breeds, and there is lack of information on the use of host proteomics. Serum samples from Santa Gertrudis cattle (naïve and phenotyped over 105 days as tick-resistant [TR] or tick-susceptible [TS]) were used to conduct differential abundance analyses of protein profiles. Serum proteins were digested into peptides followed by identification and quantification using sequential window acquisition of all instances of theoretical fragment ion mass spectrometry. Before tick infestation, abundance of 28 proteins differed significantly (adjusted P < 10-5 ) between TR and TS. These differences were also observed following tick infestation (TR vs TS) with a further eight differentially abundant proteins in TR cattle, suggesting possible roles in adaptive responses. The intragroup comparisons (TS-0 vs TS and TR-0 vs TR) showed that tick infestation elicited quite similar responses in both groups of cattle, but with relatively stronger responses in TR cattle. Many of the significantly differentially abundant proteins in TR Santa Gertrudis cattle (before and after tick infestation) were associated with immune responses including complement factors, chemotaxis for immune cells and acute-phase responses.
Collapse
Affiliation(s)
- Ali Raza
- Centre for Animal Science, Queensland Alliance for Agriculture & Food Innovation, University of Queensland, St Lucia, Qld, Australia
| | - Benjamin L Schulz
- School of Chemistry and Molecular Bioscience, University of Queensland, Brisbane, Qld, Australia
| | - Amanda Nouwens
- School of Chemistry and Molecular Bioscience, University of Queensland, Brisbane, Qld, Australia
| | - Lousie A Jackson
- Biosecurity Sciences Laboratory, Department of Agriculture and Fisheries, Brisbane, Qld, Australia
| | - Emily K Piper
- Global Genetics Laboratory Operations and Customer Support, Kalamazoo, MI, USA
| | - Peter James
- Centre for Animal Science, Queensland Alliance for Agriculture & Food Innovation, University of Queensland, St Lucia, Qld, Australia
| | - Nicholas N Jonsson
- The University of Glasgow, Institute of Biodiversity, Animal Health and Comparative Medicine, Glasgow, UK
| | - Ala E Tabor
- Centre for Animal Science, Queensland Alliance for Agriculture & Food Innovation, University of Queensland, St Lucia, Qld, Australia.,School of Chemistry and Molecular Bioscience, University of Queensland, Brisbane, Qld, Australia
| |
Collapse
|
11
|
Asiri A, Alwadaani D, Umair M, Alhamoudi KM, Almuhanna MH, Nasir A, Alrfaei BM, Al Tuwaijri A, Barhoumi T, Alyafee Y, Almuzzaini B, Aldrees M, Ballow M, Alayyar L, Al Abdulrahman A, Alhaidan Y, Al Ghasham N, Al-Ajaji S, Alsalamah M, Al Suwairi W, Alfadhel M. Pancytopenia, Recurrent Infection, Poor Wound Healing, Heterotopia of the Brain Probably Associated with A Candidate Novel de Novo CDC42 Gene Defect: Expanding the Molecular and Phenotypic Spectrum. Genes (Basel) 2021; 12:genes12020294. [PMID: 33672558 PMCID: PMC7923796 DOI: 10.3390/genes12020294] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Revised: 02/02/2021] [Accepted: 02/09/2021] [Indexed: 01/17/2023] Open
Abstract
CDC42 (cell division cycle protein 42) belongs to the Rho GTPase family that is known to control the signaling axis that regulates several cellular functions, including cell cycle progression, migration, and proliferation. However, the functional characterization of the CDC42 gene in mammalian physiology remains largely unclear. Here, we report the genetic and functional characterization of a non-consanguineous Saudi family with a single affected individual. Clinical examinations revealed poor wound healing, heterotopia of the brain, pancytopenia, and recurrent infections. Whole exome sequencing revealed a de novo missense variant (c.101C > A, p.Pro34Gln) in the CDC42 gene. The functional assays revealed a substantial reduction in the growth and motility of the patient cells as compared to the normal cells control. Homology three-dimensional (3-D) modeling of CDC42 revealed that the Pro34 is important for the proper protein secondary structure. In conclusion, we report a candidate disease-causing variant, which requires further confirmation for the etiology of CDC42 pathogenesis. This represents the first case from the Saudi population. The current study adds to the spectrum of mutations in the CDC42 gene that might help in genetic counseling and contributes to the CDC42-related genetic and functional characterization. However, further studies into the molecular mechanisms that are involved are needed in order to determine the role of the CDC42 gene associated with aberrant cell migration and immune response.
Collapse
Affiliation(s)
- Abdulaziz Asiri
- Faculty of Applied Medical Sciences, University of Bisha, 255, Al Nakhil, Bisha 67714, Saudi Arabia;
| | - Deemah Alwadaani
- Medical Genomics Research Department, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, King AbdulAziz Medical City, Ministry of National Guard Health Affairs (MNG-HA), Riyadh 11426, Saudi Arabia; (D.A.); (M.U.); (K.M.A.); (A.A.T.); (Y.A.); (B.A.); (M.A.); (M.B.); (L.A.); (A.A.A.); (Y.A.)
| | - Muhammad Umair
- Medical Genomics Research Department, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, King AbdulAziz Medical City, Ministry of National Guard Health Affairs (MNG-HA), Riyadh 11426, Saudi Arabia; (D.A.); (M.U.); (K.M.A.); (A.A.T.); (Y.A.); (B.A.); (M.A.); (M.B.); (L.A.); (A.A.A.); (Y.A.)
| | - Kheloud M. Alhamoudi
- Medical Genomics Research Department, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, King AbdulAziz Medical City, Ministry of National Guard Health Affairs (MNG-HA), Riyadh 11426, Saudi Arabia; (D.A.); (M.U.); (K.M.A.); (A.A.T.); (Y.A.); (B.A.); (M.A.); (M.B.); (L.A.); (A.A.A.); (Y.A.)
| | - Mohammed H. Almuhanna
- Cellular Therapy and Cancer Research Department, King Abdullah International Medical Research Center, King Saud Bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Ministry of National Guard Health Affairs (MNG-HA), Riyadh 11426, Saudi Arabia;
| | - Abdul Nasir
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea;
| | - Bahauddeen M. Alrfaei
- Stem Cells Department, King Abdullah International Medical Research Center, King Saud Bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Ministry of National Guard Health Affairs (MNG-HA), Riyadh 11426, Saudi Arabia;
| | - Abeer Al Tuwaijri
- Medical Genomics Research Department, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, King AbdulAziz Medical City, Ministry of National Guard Health Affairs (MNG-HA), Riyadh 11426, Saudi Arabia; (D.A.); (M.U.); (K.M.A.); (A.A.T.); (Y.A.); (B.A.); (M.A.); (M.B.); (L.A.); (A.A.A.); (Y.A.)
| | - Tlili Barhoumi
- Medical Core Facility and Research Platforms, King Abdullah International Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh 11426, Saudi Arabia;
| | - Yusra Alyafee
- Medical Genomics Research Department, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, King AbdulAziz Medical City, Ministry of National Guard Health Affairs (MNG-HA), Riyadh 11426, Saudi Arabia; (D.A.); (M.U.); (K.M.A.); (A.A.T.); (Y.A.); (B.A.); (M.A.); (M.B.); (L.A.); (A.A.A.); (Y.A.)
| | - Bader Almuzzaini
- Medical Genomics Research Department, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, King AbdulAziz Medical City, Ministry of National Guard Health Affairs (MNG-HA), Riyadh 11426, Saudi Arabia; (D.A.); (M.U.); (K.M.A.); (A.A.T.); (Y.A.); (B.A.); (M.A.); (M.B.); (L.A.); (A.A.A.); (Y.A.)
| | - Mohammed Aldrees
- Medical Genomics Research Department, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, King AbdulAziz Medical City, Ministry of National Guard Health Affairs (MNG-HA), Riyadh 11426, Saudi Arabia; (D.A.); (M.U.); (K.M.A.); (A.A.T.); (Y.A.); (B.A.); (M.A.); (M.B.); (L.A.); (A.A.A.); (Y.A.)
| | - Mariam Ballow
- Medical Genomics Research Department, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, King AbdulAziz Medical City, Ministry of National Guard Health Affairs (MNG-HA), Riyadh 11426, Saudi Arabia; (D.A.); (M.U.); (K.M.A.); (A.A.T.); (Y.A.); (B.A.); (M.A.); (M.B.); (L.A.); (A.A.A.); (Y.A.)
| | - Latifah Alayyar
- Medical Genomics Research Department, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, King AbdulAziz Medical City, Ministry of National Guard Health Affairs (MNG-HA), Riyadh 11426, Saudi Arabia; (D.A.); (M.U.); (K.M.A.); (A.A.T.); (Y.A.); (B.A.); (M.A.); (M.B.); (L.A.); (A.A.A.); (Y.A.)
| | - Abdulkareem Al Abdulrahman
- Medical Genomics Research Department, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, King AbdulAziz Medical City, Ministry of National Guard Health Affairs (MNG-HA), Riyadh 11426, Saudi Arabia; (D.A.); (M.U.); (K.M.A.); (A.A.T.); (Y.A.); (B.A.); (M.A.); (M.B.); (L.A.); (A.A.A.); (Y.A.)
| | - Yazeid Alhaidan
- Medical Genomics Research Department, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, King AbdulAziz Medical City, Ministry of National Guard Health Affairs (MNG-HA), Riyadh 11426, Saudi Arabia; (D.A.); (M.U.); (K.M.A.); (A.A.T.); (Y.A.); (B.A.); (M.A.); (M.B.); (L.A.); (A.A.A.); (Y.A.)
| | - Nahlah Al Ghasham
- Hematology Division, Department of Pathology and Laboratory Medicine, King Abdulaziz Medical City, Riyadh 11426, Saudi Arabia;
| | - Sulaiman Al-Ajaji
- Allergy and Immunology Division, Department of Pediatrics, King Abdullah Specialist Children’s Hospital, King Saud Bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Ministry of National Guard Health Affairs (MNG-HA), Riyadh 11426, Saudi Arabia; (S.A.-A.); (M.A.)
| | - Mohammad Alsalamah
- Allergy and Immunology Division, Department of Pediatrics, King Abdullah Specialist Children’s Hospital, King Saud Bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Ministry of National Guard Health Affairs (MNG-HA), Riyadh 11426, Saudi Arabia; (S.A.-A.); (M.A.)
| | - Wafa Al Suwairi
- Rheumatology Division, Department of Pediatrics, King Abdullah Specialist Children’s Hospital, King Saud Bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Ministry of National Guard Health Affairs (MNG-HA), Riyadh 11426, Saudi Arabia;
| | - Majid Alfadhel
- Medical Genomics Research Department, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, King AbdulAziz Medical City, Ministry of National Guard Health Affairs (MNG-HA), Riyadh 11426, Saudi Arabia; (D.A.); (M.U.); (K.M.A.); (A.A.T.); (Y.A.); (B.A.); (M.A.); (M.B.); (L.A.); (A.A.A.); (Y.A.)
- Genetics and Precision Medicine Department (GPM), King Abdullah Specialized Children’s Hospital, King Saud Bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Ministry of National Guard Health Affairs (MNG-HA), Riyadh 11426, Saudi Arabia
- Correspondence: ; Tel.: +966-11-805-3560; Fax: +966-11-805-5555
| |
Collapse
|
12
|
Wang J, Dey A, Kramer AH, Miao Y, Liu J, Baker L, Friedman JM, Nacharaju P, Chuck RS, Zhang C, Sharp DJ. A Novel Therapeutic Approach to Corneal Alkaline Burn Model by Targeting Fidgetin-Like 2, a Microtubule Regulator. Transl Vis Sci Technol 2021; 10:17. [PMID: 33510956 PMCID: PMC7804583 DOI: 10.1167/tvst.10.1.17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 12/11/2020] [Indexed: 12/26/2022] Open
Abstract
Purpose The purpose of this study was to determine the efficacy of nanoparticle-encapsulated Fidgetin-like 2 (FL2) siRNA (FL2-NPsi), a novel therapeutic agent targeting the FL2 gene, for the treatment of corneal alkaline chemical injury. Methods Eighty 12-week-old, male Sprague-Dawley rats were divided evenly into 8 treatment groups: prednisolone, empty nanoparticles, control-NPsi (1 µM, 10 µM, and 20 µM) and FL2-NPsi (1 µM, 10 µM, and 20 µM). An alkaline burn was induced onto the cornea of each rat, which was then treated for 14 days according to group assignment. Clinical, histopathologic, and immunohistochemical analyses were conducted to assess for wound healing. FL2-NPsi-mediated knockdown of FL2 was confirmed by in vitro quantitative polymerase chain reaction (qPCR). Toxicity assays were performed to assess for apoptosis (terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick-end labeling [TUNEL] assay) and nerve damage (whole mount immunochemical staining). Statistical analyses were performed using Student's t-test and ANOVA. Results Compared with controls, FL2-NPsi-treated groups demonstrated enhanced corneal wound healing, with the 10 and 20 µM FL2-NPsi-treated groups demonstrating maximum rates of corneal re-epithelialization as assessed by ImageJ software, enhanced corneal transparency, and improved stromal organization on histology. Immunohistochemical analysis of vascular endothelial cells, macrophages, and neutrophils did not show significant differences between treatment groups. FL2-NPsi was not found to be toxic to nerves or induce apoptosis (p = 0.917). Conclusions Dose-response studies found both 10 and 20 µM FL2-NPsi to be efficacious in this rat model. FL2-NPsi may offer a novel treatment for corneal alkaline chemical injuries. Translational Relevance Basic cell biology findings about the microtubule cytoskeleton were used to design a therapeutic to enhance corneal cell migration, highlighting the promise of targeting microtubules to regulate corneal wound healing.
Collapse
Affiliation(s)
- Jessie Wang
- Department of Ophthalmology & Visual Sciences, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA.,MicroCures, Inc., Bronx, NY, USA
| | | | | | - Yuan Miao
- Department of Ophthalmology & Visual Sciences, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Juan Liu
- Department of Ophthalmology & Visual Sciences, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | | | - Joel M Friedman
- Department of Physiology & Biophysics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Parimala Nacharaju
- Department of Physiology & Biophysics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Roy S Chuck
- Department of Ophthalmology & Visual Sciences, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Cheng Zhang
- Department of Ophthalmology & Visual Sciences, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - David J Sharp
- Department of Ophthalmology & Visual Sciences, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA.,MicroCures, Inc., Bronx, NY, USA.,Department of Physiology & Biophysics, Albert Einstein College of Medicine, Bronx, NY, USA.,Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, USA
| |
Collapse
|
13
|
Skorodumova LO, Belodedova AV, Sharova EI, Malyugin BE. [Search for genetic markers for precise diagnostics of keratoconus]. BIOMEDIT︠S︡INSKAI︠A︡ KHIMII︠A︡ 2019; 65:9-20. [PMID: 30816092 DOI: 10.18097/pbmc20196501009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Keratoconus is a chronic disorder of the cornea, characterized by its progressive thinning, stretching, and conical protrusion. Diagnostics of subclinical keratoconus, as well as its early stages (forme fruste), is a complex problem. The presence of these forms of keratoconus in a patient is one of the reasons for the development of keratectasia after laser refractive surgery. Currently, the role of genetic factors in keratoconus development has been proven. This indicates the possibility of diagnostics of subclinical and forme fruste keratoconus using genetic markers. Knowledge about the patient's genetic susceptibility to keratoconus would allow correcting the tactics of treatment of refractive anomalies and avoiding serious side effects. The studies of causal mutations indicate the genetic heterogeneity of keratoconus, which complicates the development of a diagnostic panel. Selection of candidate variants from the currently known ones based on clear criteria may be one of the approaches for diagnostic markers search. In this review, we have analyzed articles on keratoconus markers in order to form a list of candidate variants for genotyping in the Russian population. The selection criteria took into account the complexes of symptoms in which a marker was found, populations in which a particular marker was investigated, the presence and results of replication studies. The analysis included markers in VSX1, SOD1, ZEB1, LOX, CAST, DOCK9, TGFBI, HGF, MAP3K19, KCND3, COL4A3, COL4A4, COL5A1, FNDC3B, FOXO1, BANP-ZNF469, MPDZ-NF1B, WNT10A genes. Based on the results of the analysis, the following candidate variants were selected for genotyping in the Russian population of patients with keratoconus: rs1536482 and rs7044529 in the COL5A1 gene, rs5745752 and rs2286194 in the HGF gene, rs4954218 in the MAP3K19 gene, rs4839200 near the KCND3 gene, rs2721051 near the FOXO1 gene, rs1324183 between the MPDZ and the NF1B genes, and rs121908120 in the WNT10A gene.
Collapse
Affiliation(s)
- L O Skorodumova
- Federal Research and Clinical Center of Physical-Chemical Medicine, Moscow, Russia
| | - A V Belodedova
- Fyodorov Eye Microsurgery Complex Federal State Institution, Moscow, Russia
| | - E I Sharova
- Federal Research and Clinical Center of Physical-Chemical Medicine, Moscow, Russia
| | - B E Malyugin
- Fyodorov Eye Microsurgery Complex Federal State Institution, Moscow, Russia
| |
Collapse
|
14
|
Olson MF. Rho GTPases, their post-translational modifications, disease-associated mutations and pharmacological inhibitors. Small GTPases 2018; 9:203-215. [PMID: 27548350 PMCID: PMC5927519 DOI: 10.1080/21541248.2016.1218407] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 07/20/2016] [Accepted: 07/20/2016] [Indexed: 10/24/2022] Open
Abstract
The 20 members of the Rho GTPase family are key regulators of a wide-variety of biological activities. In response to activation, they signal via downstream effector proteins to induce dynamic alterations in the organization of the actomyosin cytoskeleton. In this review, post-translational modifications, mechanisms of dysregulation identified in human pathological conditions, and the ways that Rho GTPases might be targeted for chemotherapy will be discussed.
Collapse
Affiliation(s)
- Michael F. Olson
- Cancer Research UK Beatson Institute, Garscube Estate, Glasgow, UK
| |
Collapse
|
15
|
Rao MV, Zaidel-Bar R. Formin-mediated actin polymerization at cell-cell junctions stabilizes E-cadherin and maintains monolayer integrity during wound repair. Mol Biol Cell 2016; 27:2844-56. [PMID: 27440924 PMCID: PMC5025271 DOI: 10.1091/mbc.e16-06-0429] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 07/12/2016] [Indexed: 02/05/2023] Open
Abstract
Cadherin-mediated cell–cell adhesion is required for epithelial tissue integrity in homeostasis, during development, and in tissue repair. Fmnl3 and mDia1 cooperate in stabilizing E-cadherin at cell–cell junctions and facilitate strong cell adhesion and monolayer cohesion during collective cell migration. Cadherin-mediated cell–cell adhesion is required for epithelial tissue integrity in homeostasis, during development, and in tissue repair. E-cadherin stability depends on F-actin, but the mechanisms regulating actin polymerization at cell–cell junctions remain poorly understood. Here we investigated a role for formin-mediated actin polymerization at cell–cell junctions. We identify mDia1 and Fmnl3 as major factors enhancing actin polymerization and stabilizing E-cadherin at epithelial junctions. Fmnl3 localizes to adherens junctions downstream of Src and Cdc42 and its depletion leads to a reduction in F-actin and E-cadherin at junctions and a weakening of cell–cell adhesion. Of importance, Fmnl3 expression is up-regulated and junctional localization increases during collective cell migration. Depletion of Fmnl3 or mDia1 in migrating monolayers results in dissociation of leader cells and impaired wound repair. In summary, our results show that formin activity at epithelial cell–cell junctions is important for adhesion and the maintenance of epithelial cohesion during dynamic processes, such as wound repair.
Collapse
Affiliation(s)
- Megha Vaman Rao
- Mechanobiology Institute, National University of Singapore, Singapore 117411
| | - Ronen Zaidel-Bar
- Mechanobiology Institute, National University of Singapore, Singapore 117411 Department of Biomedical Engineering, National University of Singapore, Singapore 117575
| |
Collapse
|
16
|
Identification and Characterization of a Novel Broad-Spectrum Virus Entry Inhibitor. J Virol 2016; 90:4494-4510. [PMID: 26912630 DOI: 10.1128/jvi.00103-16] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 02/09/2016] [Indexed: 11/20/2022] Open
Abstract
UNLABELLED Virus entry into cells is a multistep process that often requires the subversion of subcellular machineries. A more complete understanding of these steps is necessary to develop new antiviral strategies. While studying the potential role of the actin network and one of its master regulators, the small GTPase Cdc42, during Junin virus (JUNV) entry, we serendipitously uncovered the small molecule ZCL278, reported to inhibit Cdc42 function as an entry inhibitor for JUNV and for vesicular stomatitis virus, lymphocytic choriomeningitis virus, and dengue virus but not for the nonenveloped poliovirus. Although ZCL278 did not interfere with JUNV attachment to the cell surface or virus particle internalization into host cells, it prevented the release of JUNV ribonucleoprotein cores into the cytosol and decreased pH-mediated viral fusion with host membranes. We also identified SVG-A astroglial cell-derived cells to be highly permissive for JUNV infection and generated new cell lines expressing fluorescently tagged Rab5c or Rab7a or lacking Cdc42 using clustered regularly interspaced short palindromic repeat (CRISPR)-caspase 9 (Cas9) gene-editing strategies. Aided by these tools, we uncovered that perturbations in the actin cytoskeleton or Cdc42 activity minimally affect JUNV entry, suggesting that the inhibitory effect of ZCL278 is not mediated by ZCL278 interfering with the activity of Cdc42. Instead, ZCL278 appears to redistribute viral particles from endosomal to lysosomal compartments. ZCL278 also inhibited JUNV replication in a mouse model, and no toxicity was detected. Together, our data suggest the unexpected antiviral activity of ZCL278 and highlight its potential for use in the development of valuable new tools to study the intracellular trafficking of pathogens. IMPORTANCE The Junin virus is responsible for outbreaks of Argentine hemorrhagic fever in South America, where 5 million people are at risk. Limited options are currently available to treat infections by Junin virus or other viruses of the Arenaviridae, making the identification of additional tools, including small-molecule inhibitors, of great importance. How Junin virus enters cells is not yet fully understood. Here we describe new cell culture models in which the cells are susceptible to Junin virus infection and to which we applied CRISPR-Cas9 genome engineering strategies to help characterize early steps during virus entry. We also uncovered ZCL278 to be a new antiviral small molecule that potently inhibits the cellular entry of the Junin virus and other enveloped viruses. Moreover, we show that ZCL278 also functions in vivo, thereby preventing Junin virus replication in a mouse model, opening the possibility for the discovery of ZCL278 derivatives of therapeutic potential.
Collapse
|
17
|
Humphreys KJ, McKinnon RA, Michael MZ. miR-18a inhibits CDC42 and plays a tumour suppressor role in colorectal cancer cells. PLoS One 2014; 9:e112288. [PMID: 25379703 PMCID: PMC4224453 DOI: 10.1371/journal.pone.0112288] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Accepted: 10/09/2014] [Indexed: 01/07/2023] Open
Abstract
The miR-17-92 cluster of microRNAs is elevated in colorectal cancer, and has a causative role in cancer development. Of the six miR-17-92 cluster members, miR-19a and b in particular are key promoters of cancer development and cell proliferation, while preliminary evidence suggests that miR-18a may act in opposition to other cluster members to decrease cell proliferation. It was hypothesised that miR-18a may have a homeostatic function in helping to contain the oncogenic effect of the entire miR-17-92 cluster, and that elevated miR-17-92 cluster activity without a corresponding increase in miR-18a may promote colorectal tumour progression. In colorectal cancer samples and corresponding normal colorectal mucosa, miR-18a displayed lower overall expression than other miR-17-92 cluster members. miR-18a was shown to have an opposing role to other miR-17-92 cluster members, in particular the key oncogenic miRNAs, miR-19a and b. Transfection of HCT116 and LIM1215 colorectal cancer cell lines with miR-18a mimics decreased proliferation, while a miR-18a inhibitor increased proliferation. miR-18a was also responsible for decreasing cell migration, altering cell morphology, inducing G1/S phase cell cycle arrest, increasing apoptosis, and enhancing the action of a pro-apoptotic agent. CDC42, a mediator of the PI3K pathway, was identified as a novel miR-18a target. Overexpression of miR-18a reduced CDC42 expression, and a luciferase assay confirmed that miR-18a directly targets the 3′UTR of CDC42. miR-18a mimics had a similar effect on proliferation as a small molecule inhibitor of CDC42. Inhibition of CDC42 expression is likely to be a key mechanism by which miR-18a impairs cancer cell growth, with a target protector experiment revealing miR-18a influences proliferation via direct inhibition of CDC42. Inhibition of CCND1 by miR-18a may also assist in this growth-suppression effect. The homeostatic function of miR-18a within the miR-17-92 cluster in colorectal cancer cells may be achieved through suppression of CDC42 and the PI3K pathway.
Collapse
Affiliation(s)
- Karen J. Humphreys
- Flinders Centre for Innovation in Cancer, School of Medicine, Flinders University, Flinders Medical Centre, Adelaide, South Australia, Australia
| | - Ross A. McKinnon
- Flinders Centre for Innovation in Cancer, School of Medicine, Flinders University, Flinders Medical Centre, Adelaide, South Australia, Australia
| | - Michael Z. Michael
- Flinders Centre for Innovation in Cancer, School of Medicine, Flinders University, Flinders Medical Centre, Adelaide, South Australia, Australia
- * E-mail:
| |
Collapse
|
18
|
Kim C, Barbut D, Heinemann MH, Pasternak G, Rosenblatt MI. Synthetic neurotensin analogues are nontoxic analgesics for the rabbit cornea. Invest Ophthalmol Vis Sci 2014; 55:3586-93. [PMID: 24825106 DOI: 10.1167/iovs.13-13050] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
PURPOSE To characterize the analgesic potency and toxicity of topical synthetic neurotensin analogues, and localize neurotensin receptors in the cornea and trigeminal ganglion. METHODS Cochet-Bonnet esthesiometry was performed on the rabbit cornea to test the analgesic dose response and duration of effect for two synthetic neurotensin analogues: NT71 and NT72. Receptors for neurotensin were localized in the murine cornea and trigeminal ganglion using quantitative PCR (qPCR), Western blotting, and immunohistochemistry. In vitro toxicity of NT71, NT72, and sodium channel blockers was evaluated using cytotoxicity, single-cell migration, and scratch closure assays performed on rabbit corneal epithelial cells. In vivo toxicity of these agents was assessed using a rabbit laser phototherapeutic keratectomy (PTK) model and histology. RESULTS NT71 and NT72 induced potent analgesic effects on the rabbit cornea at concentrations between 1.0 and 2.5 mg/mL, lasting up to 180 minutes. A site-specific distribution of neurotensin receptors was observed in the murine cornea and trigeminal ganglion. NT71 and NT72 did not cause any significant in vitro or in vivo toxicity, in contrast to sodium channel blockers. CONCLUSIONS Synthetic neurotensin analogues are potent analgesics that avoid the toxicities associated with established topical analgesic agents. Receptors for neurotensin are present in both the cornea and trigeminal ganglion.
Collapse
Affiliation(s)
- Charles Kim
- Margaret M. Dyson Vision Research Institute, Department of Ophthalmology, Weill Cornell Medical College, New York, New York, United States
| | - Denise Barbut
- Sarentis Therapeutics, Inc., New York, New York, United States
| | - Murk H Heinemann
- Department of Ophthalmology, Memorial Sloan Kettering Cancer Center, New York, New York, United States
| | - Gavril Pasternak
- Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, New York, United States
| | - Mark I Rosenblatt
- Margaret M. Dyson Vision Research Institute, Department of Ophthalmology, Weill Cornell Medical College, New York, New York, United States
| |
Collapse
|
19
|
El-Sayed FG, Camden JM, Woods LT, Khalafalla MG, Petris MJ, Erb L, Weisman GA. P2Y2 nucleotide receptor activation enhances the aggregation and self-organization of dispersed salivary epithelial cells. Am J Physiol Cell Physiol 2014; 307:C83-96. [PMID: 24760984 DOI: 10.1152/ajpcell.00380.2013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Hyposalivation resulting from salivary gland dysfunction leads to poor oral health and greatly reduces the quality of life of patients. Current treatments for hyposalivation are limited. However, regenerative medicine to replace dysfunctional salivary glands represents a revolutionary approach. The ability of dispersed salivary epithelial cells or salivary gland-derived progenitor cells to self-organize into acinar-like spheres or branching structures that mimic the native tissue holds promise for cell-based reconstitution of a functional salivary gland. However, the mechanisms involved in salivary epithelial cell aggregation and tissue reconstitution are not fully understood. This study investigated the role of the P2Y2 nucleotide receptor (P2Y2R), a G protein-coupled receptor that is upregulated following salivary gland damage and disease, in salivary gland reconstitution. In vitro results with the rat parotid acinar Par-C10 cell line indicate that P2Y2R activation with the selective agonist UTP enhances the self-organization of dispersed salivary epithelial cells into acinar-like spheres. Other results indicate that the P2Y2R-mediated response is dependent on epidermal growth factor receptor activation via the metalloproteases ADAM10/ADAM17 or the α5β1 integrin/Cdc42 signaling pathway, which leads to activation of the MAPKs JNK and ERK1/2. Ex vivo data using primary submandibular gland cells from wild-type and P2Y2R(-/-) mice confirmed that UTP-induced migratory responses required for acinar cell self-organization are mediated by the P2Y2R. Overall, this study suggests that the P2Y2R is a promising target for salivary gland reconstitution and identifies the involvement of two novel components of the P2Y2R signaling cascade in salivary epithelial cells, the α5β1 integrin and the Rho GTPase Cdc42.
Collapse
Affiliation(s)
- Farid G El-Sayed
- Department of Biochemistry, University of Missouri, Columbia, Missouri; Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri
| | - Jean M Camden
- Department of Biochemistry, University of Missouri, Columbia, Missouri; Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri
| | - Lucas T Woods
- Department of Biochemistry, University of Missouri, Columbia, Missouri; Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri
| | - Mahmoud G Khalafalla
- Department of Biochemistry, University of Missouri, Columbia, Missouri; Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri
| | - Michael J Petris
- Department of Biochemistry, University of Missouri, Columbia, Missouri; Department of Nutritional Sciences and Exercise Physiology, University of Missouri, Columbia, Missouri; and Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri
| | - Laurie Erb
- Department of Biochemistry, University of Missouri, Columbia, Missouri; Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri
| | - Gary A Weisman
- Department of Biochemistry, University of Missouri, Columbia, Missouri; Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri
| |
Collapse
|
20
|
Hou A, Toh LX, Gan KH, Lee KJR, Manser E, Tong L. Rho GTPases and regulation of cell migration and polarization in human corneal epithelial cells. PLoS One 2013; 8:e77107. [PMID: 24130842 PMCID: PMC3795020 DOI: 10.1371/journal.pone.0077107] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Accepted: 09/06/2013] [Indexed: 01/11/2023] Open
Abstract
Purpose Epithelial cell migration is required for regeneration of tissues and can be defective in a number of ocular surface diseases. This study aimed to determine the expression pattern of Rho family small G-proteins in human corneal epithelial cells to test their requirement in directional cell migration. Methods Rho family small G-protein expression was assessed by reverse transcription-polymerase chain reaction. Dominant-inhibitory constructs encoding Rho proteins or Rho protein targeting small interfering RNA were transfected into human corneal epithelial large T antigen cells, and wound closure rate were evaluated by scratch wounding assay, and a complementary non-traumatic cell migration assay. Immunofluorescence staining was performed to study cell polarization and to assess Cdc42 downstream effector. Results Cdc42, Chp, Rac1, RhoA, TC10 and TCL were expressed in human corneal epithelial cells. Among them, Cdc42 and TCL were found to significantly affect cell migration in monolayer scratch assays. These results were confirmed through the use of validated siRNAs directed to Cdc42 and TCL. Scramble siRNA transfected cells had high percentage of polarized cells than Cdc42 or TCL siRNA transfected cells at the wound edge. We showed that the Cdc42-specific effector p21-activated kinase 4 localized predominantly to cell-cell junctions in cell monolayers, but failed to translocate to the leading edge in Cdc42 siRNA transfected cells after monolayer wounding. Conclusion Rho proteins expressed in cultured human corneal epithelial cells, and Cdc42, TCL facilitate two-dimensional cell migration in-vitro. Although silencing of Cdc42 and TCL did not noticeably affect the appearance of cell adhesions at the leading edge, the slower migration of these cells indicates both GTP-binding proteins play important roles in promoting cell movement of human corneal epithelial cells.
Collapse
Affiliation(s)
- Aihua Hou
- Ocular Surface Research Group, Singapore Eye Research Institute, Singapore, Singapore, Singapore
| | - Li Xian Toh
- RGS Group, Institute of Medical Biology, A, Star, Singapore, Singapore
| | - Kah Hui Gan
- Ocular Surface Research Group, Singapore Eye Research Institute, Singapore, Singapore, Singapore
| | - Khee Jin Ryan Lee
- Ocular Surface Research Group, Singapore Eye Research Institute, Singapore, Singapore, Singapore
| | - Edward Manser
- RGS Group, Institute of Medical Biology, A, Star, Singapore, Singapore
| | - Louis Tong
- Ocular Surface Research Group, Singapore Eye Research Institute, Singapore, Singapore, Singapore
- Singapore National Eye Center, Singapore, Singapore, Singapore
- Duke-NUS Graduate Medical School, Singapore, Singapore, Singapore
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore, Singapore
- * E-mail:
| |
Collapse
|