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Nam K, Dos Santos HT, Maslow FM, Small T, Shanbhag V, Petris MJ, Baker OJ. Copper chelation reduces early collagen deposition and preserves saliva secretion in irradiated salivary glands. Heliyon 2024; 10:e24368. [PMID: 38298614 PMCID: PMC10828693 DOI: 10.1016/j.heliyon.2024.e24368] [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: 09/22/2023] [Revised: 01/05/2024] [Accepted: 01/08/2024] [Indexed: 02/02/2024] Open
Abstract
Radiation therapy is a first-line treatment for head and neck cancer; however, it typically leads to hyposalivation stemming from fibrosis of the salivary gland. Current strategies to restore glandular function are dependent on the presence of residual functional salivary gland tissue, a condition commonly not met in patients with extensive fibrotic coverage of the salivary gland resulting from radiation therapy. Fibrosis is defined by the pathological accumulation of connective tissue (i.e., extracellular matrix) and excessive deposition of crosslinked (fibrillar) collagen that can impact a range of tissues and given that collagen crosslinking is necessary for fibrosis formation, inhibiting this process is a reasonable focus for developing anti-fibrotic therapies. Collagen crosslinking is catalyzed by the lysyl oxidase family of secreted copper-dependent metalloenzymes, and since that copper is an essential cofactor in all lysyl oxidase family members, we tested whether localized delivery of a copper chelator into the submandibular gland of irradiated mice could suppress collagen deposition and preserve the structure and function of this organ. Our results demonstrate that transdermal injection of tetrathiomolybdate into salivary glands significantly reduced the early deposition of fibrillar collagen in irradiated mice and preserved the integrity and function of submandibular gland epithelial tissue. Together, these studies identify copper metabolism as a novel therapeutic target to control radiation induced damage to the salivary gland and the current findings further indicate the therapeutic potential of repurposing clinically approved copper chelators as neoadjuvant treatments for radiation therapy.
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Affiliation(s)
- Kihoon Nam
- Christopher S. Bond Life Sciences Center, United States
- School of Medicine Department of Otolaryngology-Head and Neck Surgery, United States
| | - Harim Tavares Dos Santos
- Christopher S. Bond Life Sciences Center, United States
- School of Medicine Department of Otolaryngology-Head and Neck Surgery, United States
| | - Frank M. Maslow
- Christopher S. Bond Life Sciences Center, United States
- School of Medicine Department of Otolaryngology-Head and Neck Surgery, United States
| | - Travis Small
- Christopher S. Bond Life Sciences Center, United States
- School of Medicine Department of Otolaryngology-Head and Neck Surgery, United States
| | - Vinit Shanbhag
- Christopher S. Bond Life Sciences Center, United States
- Department of Biochemistry, United States
| | - Michael J. Petris
- Christopher S. Bond Life Sciences Center, United States
- Department of Biochemistry, United States
- Department of Ophthalmology, University of Missouri, Columbia, MO, 65211, United States
| | - Olga J. Baker
- Christopher S. Bond Life Sciences Center, United States
- School of Medicine Department of Otolaryngology-Head and Neck Surgery, United States
- Department of Biochemistry, United States
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Liu J, Lv S, Ma W, Yang D, Zhang X. Effect of WISP1 on paraquat-induced EMT. Toxicol In Vitro 2023; 93:105693. [PMID: 37689312 DOI: 10.1016/j.tiv.2023.105693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 09/04/2023] [Accepted: 09/06/2023] [Indexed: 09/11/2023]
Abstract
BACKGROUND Paraquat (PQ) can induce pulmonary fibrosis (PF) by modulating epithelial-mesenchymal transition (EMT) of alveolar epithelial cells, but the molecular mechanism is unknown. In this paper, the role of Wnt-inducible signaling protein-1 (WISP1) in PQ-induced EMT was inspected. METHODS The morphology, apoptosis, and mortality of A549 cells were observed through a microscope. The mRNA and protein levels of WISP1, E-cadherin, and Vimentin were confirmed by quantitative reverse transcription polymerase chain reaction (qRT-PCR) and western blot. RESULTS With the increase of PQ concentration, the morphology of A549 cells was apparently changed, cell apoptosis and mortality were enhanced. Besides, the E-cadherin abundance was reduced (p < 0.01), however, WISP1 and Vimentin contents were boosted after PQ treatment (p < 0.01). With the increase of PQ treatment time, the epithelial index of cells first increased and then decreased. The expression of WISP1 gene increased significantly with the increase of PQ treatment time (p < 0.01). Silence of WISP1 abolished the effect of PQ treatment on E-cadherin and Vimentin levels (p < 0.01). Downregulation of WISP1 curbed morphology change and PQ-induced EMT in A549 cells. CONCLUSION Knockdown of WISP1 inhibited PQ-induced EMT in A549 cells. This conclusion might provide a new therapeutic target for PQ poisoning treatment.
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Affiliation(s)
- Jingyan Liu
- Department of Emergency, The Second Affiliated Hospital, School of Medicine, The Chinese University of Hong Kong, Longgang District People's Hospital of Shenzhen, Shenzhen, Guangdong 518172, PR China
| | - Shengnan Lv
- Department of Out-patient, Linyi People's Hospital, Linyi 276000, Shandong, China
| | - Wanling Ma
- Department of Radiology, The Second Affiliated Hospital, School of Medicine, The Chinese University of Hong Kong, Longgang District People's Hospital of Shenzhen, Shenzhen, Guangdong 518172, PR China
| | - Dong Yang
- Department of Vascular Surgery, The Second Affiliated Hospital, School of Medicine, The Chinese University of Hong Kong, Longgang District People's Hospital of Shenzhen, Shenzhen, Guangdong 518172, PR China
| | - Xuchang Zhang
- Department of Geriatrics Emergency, The Second Affiliated Hospital, School of Medicine, The Chinese University of Hong Kong, Longgang District People's Hospital of Shenzhen, Shenzhen, Guangdong 518172, PR China.
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Noorlander A, Wesseling S, Rietjens IMCM, van Ravenzwaay B. Predicting acute paraquat toxicity using physiologically based kinetic modelling incorporating in vitro active renal excretion via the OCT2 transporter. Toxicol Lett 2023; 388:30-39. [PMID: 37806368 DOI: 10.1016/j.toxlet.2023.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 09/14/2023] [Accepted: 10/04/2023] [Indexed: 10/10/2023]
Abstract
Including active renal excretion in physiologically based kinetic (PBK) models can improve their use in quantitative in vitro- in vivo extrapolation (QIVIVE) as a new approach methodology (NAM) for predicting the acute toxicity of organic cation transporter 2 (OCT2) substrates like paraquat (PQ). To realise this NAM, kinetic parameters Vmax and Km for in vitro OCT2 transport of PQ were obtained from the literature. Appropriate scaling factors were applied to translate the in vitro Vmax to an in vivo Vmax. in vitro cytotoxicity data were defined in the rat RLE-6TN and L2 cell lines and the human A549 cell line. The developed PQ PBK model was used to apply reverse dosimetry for QIVIVE translating the in vitro cytotoxicity concentration-response curves to predicted in vivo toxicity dose-response curves after which the lower and upper bound benchmark dose (BMD) for 50% lethality (BMDL50 and BMDU50) were derived by applying BMD analysis. Comparing the predictions to the in vivo reported LD50 values resulted in a conservative prediction for rat and a comparable prediction for human showing proof of principle on the inclusion of active renal excretion and prediction of PQ acute toxicity for the developed NAM.
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Affiliation(s)
- Annelies Noorlander
- Division of Toxicology, Wageningen University, Stippeneng 4, 6708 WE Wageningen, the Netherlands.
| | - Sebastiaan Wesseling
- Division of Toxicology, Wageningen University, Stippeneng 4, 6708 WE Wageningen, the Netherlands
| | - Ivonne M C M Rietjens
- Division of Toxicology, Wageningen University, Stippeneng 4, 6708 WE Wageningen, the Netherlands
| | - Bennard van Ravenzwaay
- Division of Toxicology, Wageningen University, Stippeneng 4, 6708 WE Wageningen, the Netherlands
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Wyatt PB, Satalich J, Cyrus J, O'Neill C, O'Connell R. Biochemical markers of postsurgical knee arthrofibrosis: A systematic review. J Orthop 2023; 35:1-6. [PMID: 36325249 PMCID: PMC9619298 DOI: 10.1016/j.jor.2022.10.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 10/09/2022] [Accepted: 10/19/2022] [Indexed: 12/15/2022] Open
Abstract
Introduction Postsurgical knee arthrofibrosis is a common complication associated with pain and limited range of motion. Although the mechanism is unclear, many biochemical and genetic markers have been identified within arthrofibrotic knees. The purpose of this systematic review is to synthesize the many biochemical and genetic markers that have been associated with surgery-induced knee arthrofibrosis in order to better guide future therapeutic endeavors. Methods A thorough search of literature was conducted on April 27, 2022. Seventeen studies met inclusion criteria for this systematic review. Inclusion criteria for this study were as follows: title or abstract discussed biochemical and genetic markers associated with postoperative knee arthrofibrosis, study design included human and/or animal subjects. Results A wide variety of genetic biomarkers (mRNA), proteins/enzymes, and cytokines were identified in both animal models and human subjects with postsurgical knee arthrofibrosis. These included various extracellular matrix-encoding mRNA sequences, matrix metalloproteinases, proteins and mRNA sequences involved in Transforming Growth Factor-β signaling, and interleukin-family cytokines to name just a few. Conclusion There are many biomarkers found in postsurgical arthrofibrotic knees. TGF-β, and mRNA/proteins that participate in TGF-β signaling (i.e., LOX, SERPINE1, PAI-1/Akt/mTOR, BMP-2), appear to be particularly common. Future comparative studies should aim to determine which of these are most relevant, and therefore, worthwhile therapeutic targets.
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Affiliation(s)
- Phillip B. Wyatt
- Virginia Commonwealth University School of Medicine, Richmond, VA, USA
| | - James Satalich
- Virginia Commonwealth University School of Medicine, Richmond, VA, USA
| | - John Cyrus
- Virginia Commonwealth University School of Medicine, Richmond, VA, USA
| | - Conor O'Neill
- Virginia Commonwealth University School of Medicine, Richmond, VA, USA
| | - Robert O'Connell
- Virginia Commonwealth University School of Medicine, Richmond, VA, USA
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Signaling pathways involved in paraquat-induced pulmonary toxicity: Molecular mechanisms and potential therapeutic drugs. Int Immunopharmacol 2022; 113:109301. [DOI: 10.1016/j.intimp.2022.109301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 09/19/2022] [Accepted: 09/28/2022] [Indexed: 11/05/2022]
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Li L, Lv S, Li X, Liu J. Wnt-induced secreted proteins-1 play an important role in paraquat-induced pulmonary fibrosis. BMC Pharmacol Toxicol 2022; 23:21. [PMID: 35387687 PMCID: PMC8988378 DOI: 10.1186/s40360-022-00560-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Accepted: 03/08/2022] [Indexed: 11/10/2022] Open
Abstract
Background The objective of this article is to observe the expression of Wnt-induced secreted proteins-1 (WISP1) in paraquat (PQ)-induced pulmonary fibrosis (PF) to explore the role of WISP1. Methods Healthy individuals were included in the control group. Patients who had acute lung injury or PF were included in the PF group. Venous blood samples were collected from the patients on days 1 and 3 following PQ poisoning to detect the expression levels of the WISP1 gene and protein concentration. Any changes in the patients’ blood gas analysis index were reviewed. In addition, chest computed tomography (CT) and x-ray images were observed to evaluate the relationship between WISP1 expression and disease severity. Results The expression of the WISP1 gene and the serum WISP1 protein concentration were higher in patients with PQ poisoning combined with PF than in patients without PF (P < 0.01). Serum PQ concentration was positively correlated with WISP1 gene expression (r = 0.621, P < 0.01), and serum WISP1 protein concentration (r = 0.596, P < 0.01) was considered a risk factor [odds ratio (OR) = 4.356, P < 0.05] for PQ-induced PF. Concurrently, the results of the adjusted and non-adjusted OR value for WISP1 gene expression and WISP1 protein concentration on day 1 was, respectively, as follows: OR = 12.797, 95% confidence interval (CI) (2.478–66.076), P = 0.002, OR’ = 11.353, P = 0.005; and OR = 1.545, 95% CI (1.197–1.995), P = 0.001, OR’ = 1.487, P = 0.003. The CT scan of a 20-year-old male with PQ-induced PF (20 ml) was observed, and it showed a typical hyaline-like lesion in the lungs on day 22 after poisoning; on day 33 after poisoning, the lungs showed localised consolidation combined with air bronchography. Conclusion The expression of WISP1 was higher in the patients with PQ-induced PF compared with the patients without PF. Accordingly, WISP1 plays an important role in PQ-induced PF.
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Affiliation(s)
- Lanrong Li
- Emergency Department, Linyi People's Hospital, Linyi, China
| | - Shengnan Lv
- Outpatient Department, Linyi People's Hospital, Linyi, China
| | - Xin Li
- Outpatient Department, Linyi People's Hospital, Linyi, China
| | - Jingyan Liu
- Emergency Department, Longgang District People's Hospital of Shenzhen, No. 53 of Aixin Road, Longgang District, Shenzhen, 518115, Guangdong Province, China.
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Perryman L, Gray SG. Fibrosis in Mesothelioma: Potential Role of Lysyl Oxidases. Cancers (Basel) 2022; 14:981. [PMID: 35205728 PMCID: PMC8870010 DOI: 10.3390/cancers14040981] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 02/07/2022] [Accepted: 02/08/2022] [Indexed: 12/13/2022] Open
Abstract
Immunotherapies (such as checkpoint inhibitors) and standard chemotherapies (such as cisplatin) have limitations in the successful treatment of malignant pleural mesothelioma (MPM). Fibrosis is the accumulation of collagen in the extracellular matrix (ECM) of tissues, making them denser than that of healthy tissues and thereby affecting drug delivery and immune cell infiltration. Moreover, fibrosis severely affects the patient's breathing and quality of life. The production of collagen and its assembly is highly regulated by various enzymes such as lysyl oxidases. Many solid tumors aberrantly express the family of lysyl oxidases (LOX/LOXL). This review examines how LOX/LOXLs were found to be dysregulated in noncancerous and cancerous settings, discusses their roles in solid tumor fibrosis and pathogenesis and explores the role of fibrosis in the development and poor clinical outcomes of patients with MPM. We examine the current preclinical status of drugs targeting LOX/LOXLs and how the incorporation of such drugs may have therapeutic benefits in the treatment and management of patients with MPM.
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Affiliation(s)
- Lara Perryman
- Drug Discovery Department, Pharmaxis Ltd., Sydney, NSW 2086, Australia;
| | - Steven G. Gray
- Thoracic Oncology, Labmed Directorate, St James’s Hospital, D08 RX0X Dublin, Ireland
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Hudkova O, Krysiuk IP, Kishko TO, Popova NM, Drobot LB, Latyshko NV. Semicarbazide diminishes the signs of bleomycin-induced pulmonary fibrosis in rats. UKRAINIAN BIOCHEMICAL JOURNAL 2021. [DOI: 10.15407/ubj93.05.072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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Meng X, Liu K, Xie H, Zhu Y, Jin W, Lu J, Wang R. Endoplasmic reticulum stress promotes epithelial‑mesenchymal transition via the PERK signaling pathway in paraquat‑induced pulmonary fibrosis. Mol Med Rep 2021; 24:525. [PMID: 34036384 PMCID: PMC8170262 DOI: 10.3892/mmr.2021.12164] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 04/26/2021] [Indexed: 12/11/2022] Open
Abstract
Pulmonary fibrosis is the primary reason for mortality in patients with paraquat (PQ) poisoning. Our previous study demonstrated that epithelial-mesenchymal transition (EMT) had a role in PQ-induced pulmonary fibrosis. However, the role of endoplasmic reticulum (ER) stress in PQ-induced EMT remains clear. The present study aimed to determine the role of ER stress in EMT in PQ-induced pulmonary fibrosis. A549 and RLE-6TN cells were incubated with LY294002 (a PI3K inhibitor) or transfected with protein kinase RNA-like ER kinase (PERK) small interfering RNA (si) for 24 h prior to being exposed to PQ. Next, the expression levels of ER stress-related proteins, PI3K/AKT/GSK-3β signaling pathway-related proteins and EMT-related markers were analyzed by performing western blotting, reverse transcription-quantitative PCR and immunofluorescence assays. The results of the present study revealed that the protein expression levels of PERK, phosphorylated (p)-PERK, p-eukaryotic initiation factor 2 (eIF2)α were significantly upregulated in the PQ group, whereas p-PI3K, p-AKT and p-GSK-3β were significantly upregulated in the sicontrol + PQ group compared with the sicontrol group. In vitro, following transfection with siPERK or treatment with the PI3K inhibitor, the protein expression levels of E-cadherin (an epithelial marker) were upregulated, whereas the protein expression levels of α-SMA (a mesenchymal marker) were downregulated. Immunofluorescence analysis revealed that the levels of E-cadherin were markedly upregulated, whereas the levels of α-SMA were notably downregulated following transfection with siPERK compared with the sicontrol group. The results of wound healing assay demonstrated that cell migration in the siPERK + PQ group was markedly decreased compared with the sicontrol + PQ group. These indicated that PQ-induced EMT was suppressed after silencing PERK. The expression levels of p-GSK-3β, p-AKT and p-PI3K were also markedly downregulated in the siPERK + PQ group compared with the sicontrol + PQ group. In conclusion, the findings of the present study suggested that ER stress may promote EMT through the PERK signaling pathway in PQ-induced pulmonary fibrosis. Thus, ER stress may represent a potential therapeutic target for PQ-induced pulmonary fibrosis.
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Affiliation(s)
- Xiaoxiao Meng
- Department of Critical Care Medicine, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 201620, P.R. China
| | - Kan Liu
- Department of Diving Medicine, Faculty of Nautical Medicine, Second Military Medical University, Shanghai 200082, P.R. China
| | - Hui Xie
- Department of Critical Care Medicine, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 201620, P.R. China
| | - Yong Zhu
- Department of Critical Care Medicine, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 201620, P.R. China
| | - Wei Jin
- Department of Critical Care Medicine, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 201620, P.R. China
| | - Jian Lu
- Department of Critical Care Medicine, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 201620, P.R. China
| | - Ruilan Wang
- Department of Critical Care Medicine, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 201620, P.R. China
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Subbiah R, Tiwari RR. The herbicide paraquat-induced molecular mechanisms in the development of acute lung injury and lung fibrosis. Crit Rev Toxicol 2021; 51:36-64. [PMID: 33528289 DOI: 10.1080/10408444.2020.1864721] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The herbicide paraquat (PQ; 1,1'-dimethyl-4,4'-bipyridylium dichloride) is a highly toxic organic heterocyclic herbicide that has been widely used in agricultural settings. Since its commercial introduction in the early 1960s, numerous cases of fatal PQ poisonings attributed to accidental and/or intentional ingestion of PQ concentrated formulations have been reported. The clinical manifestations of the respiratory system during the acute phase of PQ poisoning mainly include acute lung injury (ALI)/acute respiratory distress syndrome (ARDS), followed by pulmonary fibrosis in a later phase. The focus of this review is to summarize the most recent publications related to PQ-induced lung toxicity as well as the underlying molecular mechanisms for PQ-mediated pathologic processes. Growing sets of data from in vitro and in vivo models have demonstrated the involvement of the PQ in regulating lung oxidative stress, inflammatory response, epigenetics, apoptosis, autophagy, and the progression of lung fibrosis. The article also summarizes novel therapeutic avenues based on a literature review, which can be explored as potential means to combat PQ-induced lung toxicity. Finally, we also presented clinical studies on the association of PQ exposure with the incidence of lung injury and pulmonary fibrosis.
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Affiliation(s)
- Rajasekaran Subbiah
- Department of Biochemistry, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | - Rajnarayan R Tiwari
- Department of Biochemistry, ICMR-National Institute for Research in Environmental Health, Bhopal, India
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Zheng F, Zhu J, Zhang W, Fu Y, Lin Z. Thal protects against paraquat-induced lung injury through a microRNA-141/HDAC6/IκBα-NF-κB axis in rat and cell models. Basic Clin Pharmacol Toxicol 2021; 128:334-347. [PMID: 33015978 PMCID: PMC7894280 DOI: 10.1111/bcpt.13505] [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: 05/28/2020] [Revised: 09/18/2020] [Accepted: 09/25/2020] [Indexed: 12/16/2022]
Abstract
The protective functions of thalidomide in paraquat (PQ)-induced injury have been reported. But the mechanisms remain largely unknown. In this research, a PQ-treated rat model was established and further treated with thalidomide. Oedema and pathological changes, oxidative stress, inflammation, fibrosis and cell apoptosis in rat lungs were detected. A PQ-treated RLE-6TN cell model was constructed, and the viability and apoptosis rate of cells were measured. Differentially expressed microRNAs (miRNAs) after thalidomide administration were screened out. Binding relationship between miR-141 and histone deacetylase 6 (HDAC6) was validated. Altered expression of miR-141 and HDAC6 was introduced to identify their involvements in thalidomide-mediated events. Consequently, thalidomide administration alone exerted no damage to rat lungs; in addition it reduced PQ-induced oedema. The oxidative stress, inflammation and cell apoptosis in rat lungs were reduced by thalidomide. In RLE-6TN cells, thalidomide increased cell viability and decreased apoptosis. miR-141 was responsible for thalidomide-mediated protective events by targeting HDAC6. Overexpression of HDAC6 blocked the protection of thalidomide against PQ-induced injury via activating the IkBα-NF-κB signalling pathway. Collectively, this study evidenced that thalidomide protects lung tissues from PQ-induced injury through a miR-141/HDAC6/IkBα-NF-κB axis.
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Affiliation(s)
- Fenshuang Zheng
- Department of Emergency MedicineSecond People's Hospital of Yunnan ProvinceKunmingChina
| | - Junbo Zhu
- Department of Emergency MedicineSecond People's Hospital of Yunnan ProvinceKunmingChina
| | - Wei Zhang
- Department of Emergency MedicineSecond People's Hospital of Yunnan ProvinceKunmingChina
| | - Yangshan Fu
- Department of Emergency MedicineSecond People's Hospital of Yunnan ProvinceKunmingChina
| | - Zhaoheng Lin
- Department of Critical Care MedicinePeople's Hospital of Xishuangbanna Dai Nationality Autonomous PrefecturePingpongChina
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Yi JH, Zhang ZC, Zhang MB, He X, Lin HR, Huang HW, Dai HB, Huang YW. Role of epithelial-to-mesenchymal transition in the pulmonary fibrosis induced by paraquat in rats. World J Emerg Med 2021; 12:214-220. [PMID: 34141037 DOI: 10.5847/wjem.j.1920-8642.2021.03.009] [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] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND This study aims to explore the characteristics of the epithelial-to-mesenchymal transition (EMT) process and its underlying molecular mechanisms in the period of paraquat (PQ)-induced pulmonary fibrosis (PF). METHODS Picrosirius red staining and collagen volume fraction were utilized to evaluate the pathological changes of PQ-induced PF in rats. Immunohistochemistry, Western blot, and real-time reverse transcriptase-polymerase chain reaction (RT-PCR) were used to measure the protein and gene expression of EMT markers, EMT-associated transcription factors, and regulators of EMT-related pathways, respectively. RESULTS The collagen deposition in the alveolar septum and increased PF markers were characteristics of pathological changes in PQ-induced PF, reached a peak on day 14 after PQ poisoning, and then decreased on day 21. The protein and gene expression of the fibrosis marker, EMT markers, transcription factors, and regulators of EMT-related signaling pathways significantly increased at different time points after PQ poisoning compared with corresponding controls (P<0.05), and most of them reached a peak on day 14, followed by a decrease on day 21. The gene expression of EMT markers was significantly correlated with PF markers, transcription factors, and regulators of EMT-related signaling pathways (P<0.05). The mRNA expression of transcription factors was significantly correlated with that of TGF-β1 and Smad2 (P<0.05 or P<0.01), instead of Wnt2 and β-catenin (P>0.05). CONCLUSIONS EMT process plays a role in the PQ-induced PF, in which most PF and EMT markers have a peak phenomenon, and its underlying molecular mechanisms might be determined by further studies.
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Affiliation(s)
- Jian-Hua Yi
- Emergency Department, the Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Zhao-Cai Zhang
- Scientific Research Department, the Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Mei-Bian Zhang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 301051, China
| | - Xin He
- Shangyu People's Hospital, Shaoxing 312300, China
| | - Hao-Ran Lin
- Pharmacy Department, the Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Hai-Wen Huang
- Scientific Research Department, the Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Hai-Bin Dai
- Pharmacy Department, the Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Yu-Wen Huang
- Pharmacy Department, the Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310009, China
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Bayram B, Limberg AK, Salib CG, Bettencourt JW, Trousdale WH, Lewallen EA, Reina N, Paradise CR, Thaler R, Morrey ME, Sanchez-Sotelo J, Berry DJ, van Wijnen AJ, Abdel MP. Molecular pathology of human knee arthrofibrosis defined by RNA sequencing. Genomics 2020; 112:2703-2712. [PMID: 32145378 PMCID: PMC7217749 DOI: 10.1016/j.ygeno.2020.03.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 02/21/2020] [Accepted: 03/03/2020] [Indexed: 12/11/2022]
Abstract
Arthrofibrosis is an abnormal histopathologic response, is debilitating for patients, and poses a substantial unsolved clinical challenge. This study characterizes molecular biomarkers and regulatory pathways associated with arthrofibrosis by comparing fibrotic and non-fibrotic human knee tissue. The fibrotic group encompasses 4 patients undergoing a revision total knee arthroplasty (TKA) for arthrofibrosis (RTKA-A) while the non-fibrotic group includes 4 patients undergoing primary TKA for osteoarthritis (PTKA) and 4 patients undergoing revision TKA for non-arthrofibrotic and non-infectious etiologies (RTKA-NA). RNA-sequencing of posterior capsule specimens revealed differences in gene expression between each patient group by hierarchical clustering, principal component analysis, and correlation analyses. Multiple differentially expressed genes (DEGs) were defined in RTKA-A versus PTKA patients (i.e., 2059 up-regulated and 1795 down-regulated genes) and RTKA-A versus RTKA-NA patients (i.e., 3255 up-regulated and 3683 down-regulated genes). Our findings define molecular and pathological markers of arthrofibrosis, as well as novel potential targets for risk profiling, early diagnosis and pharmacological treatment of patients.
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Affiliation(s)
- Banu Bayram
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, United States.
| | - Afton K Limberg
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, United States.
| | | | - Jacob W Bettencourt
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, United States.
| | - William H Trousdale
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, United States.
| | - Eric A Lewallen
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, United States.
| | - Nicolas Reina
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, United States.
| | | | - Roman Thaler
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, United States.
| | - Mark E Morrey
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, United States.
| | | | - Daniel J Berry
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, United States.
| | - Andre J van Wijnen
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, United States; Department of Biochemistry & Molecular Biology, Mayo Clinic, Rochester, MN, United States
| | - Matthew P Abdel
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, United States.
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14
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Wang Z, Gu D, Sheng L, Cai J. Protective Effect of Anthocyanin on Paraquat-Induced Apoptosis and Epithelial-Mesenchymal Transition in Alveolar Type II Cells. Med Sci Monit 2018; 24:7980-7987. [PMID: 30403199 PMCID: PMC6234756 DOI: 10.12659/msm.910730] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Paraquat (PQ) can over-accumulate in alveolar epithelial cells. Anthocyanin (An) can exert anti-oxidative properties. The role of An in PQ-induced toxicity is unclear, so we aimed to explore whether An could inhibit epithelial mesenchymal transition (EMT) induced by PQ in alveolar cells. MATERIAL AND METHODS lveolar epithelial cells were treated with PQ and An with concentration gradient for 12, 24, and 48 h. The cell viability, ROS level, and apoptosis rate were determined using the Cell Counting Kit-8 (CCK-8) and flow cytometry, respectively. The lactate dehydrogenase (LDH) leakage, methane dicarboxylic aldehyde (MDA) level, glutathione peroxidase (GPx), and superoxide dismutase (SOD) activities were determined by spectrophotometric method. The mRNA and protein expressions were detected using quantitative real-time PCR (qPCR) and Western blot, respectively. RESULTS An reduced the PQ-induced apoptosis in a dose-dependent manner. Moreover, An reduced the ratio of Bax/Bcl-2 to ROS level. We found that An suppressed the activity of LDH and MDA and improved SOD and GPX levels. Additionally, the level of PQ-induced E-cadherin was decreased by An while the expressions of vimentin, α-smooth muscle actin (α-SMA), and collagens type I (col-I) were increased. Furthermore, An inhibited the levels of transforming growth factor β1 (TGF-β1) and activin receptor-like kinase 5 (ALK5) and reduced the phosphorylation of smad2. CONCLUSIONS Our study shows newly discovered effects of anthocyanidins on EMT and supports their chemopreventive effects in paraquat-induced apoptosis in alveolar type II cells.
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Affiliation(s)
- Zhihua Wang
- Emergency Department of Traumatology, Shanghai Pudong Hospital, Shanghai, China (mainland)
| | - Dongming Gu
- Emergency Department of Traumatology, Shanghai Pudong Hospital, Shanghai, China (mainland)
| | - Lezhi Sheng
- Emergency Department of Traumatology, Shanghai Pudong Hospital, Shanghai, China (mainland)
| | - Jinfang Cai
- Emergency Department of Traumatology, Shanghai Pudong Hospital, Shanghai, China (mainland)
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15
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Kowtharapu BS, Prakasam RK, Murín R, Koczan D, Stahnke T, Wree A, Jünemann AGM, Stachs O. Role of Bone Morphogenetic Protein 7 (BMP7) in the Modulation of Corneal Stromal and Epithelial Cell Functions. Int J Mol Sci 2018; 19:ijms19051415. [PMID: 29747422 PMCID: PMC5983782 DOI: 10.3390/ijms19051415] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 05/02/2018] [Accepted: 05/07/2018] [Indexed: 12/20/2022] Open
Abstract
In the cornea, healing of the wounded avascular surface is an intricate process comprising the involvement of epithelial, stromal and neuronal cell interactions. These interactions result to the release of various growth factors that play prominent roles during corneal wound healing response. Bone morphogenetic proteins (BMPs) are unique multi-functional potent growth factors of the transforming growth factor-beta (TGF-β) superfamily. Treatment of corneal epithelial cells with substance P and nerve growth factor resulted to an increase in the expression of BMP7 mRNA. Since BMP7 is known to modulate the process of corneal wound healing, in this present study, we investigated the influence of exogenous rhBMP7 on human corneal epithelial cell and stromal cell (SFs) function. To obtain a high-fidelity expression profiling of activated biomarkers and pathways, transcriptome-wide gene-level expression profiling of epithelial cells in the presence of BMP7 was performed. Gene ontology analysis shows BMP7 stimulation activated TGF-β signaling and cell cycle pathways, whereas biological processes related to cell cycle, microtubule and intermediate filament cytoskeleton organization were significantly impacted in corneal epithelial cells. Scratch wound healing assay showed increased motility and migration of BMP7 treated epithelial cells. BMP7 stimulation studies show activation of MAPK cascade proteins in epithelial cells and SFs. Similarly, a difference in the expression of claudin, Zink finger E-box-binding homeobox 1 was observed along with phosphorylation levels of cofilin in epithelial cells. Stimulation of SFs with BMP7 activated them with increased expression of α-smooth muscle actin. In addition, an elevated phosphorylation of epidermal growth factor receptor following BMP7 stimulation was also observed both in corneal epithelial cells and SFs. Based on our transcriptome analysis data on epithelial cells and the results obtained in SFs, we conclude that BMP7 contributes to epithelial-to-mesenchymal transition-like responses and plays a role equivalent to TGF-β in the course of corneal wound healing.
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Affiliation(s)
- Bhavani S Kowtharapu
- Department of Ophthalmology, Rostock University Medical Center, 18057 Rostock, Germany.
| | - Ruby Kala Prakasam
- Department of Ophthalmology, Rostock University Medical Center, 18057 Rostock, Germany.
| | - Radovan Murín
- Department of Medical Biochemistry, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
| | - Dirk Koczan
- Institute for Immunology, Rostock University Medical Center, 18057 Rostock, Germany.
| | - Thomas Stahnke
- Department of Ophthalmology, Rostock University Medical Center, 18057 Rostock, Germany.
| | - Andreas Wree
- Institute for Anatomy, Rostock University Medical Center, 18057 Rostock, Germany.
| | - Anselm G M Jünemann
- Department of Ophthalmology, Rostock University Medical Center, 18057 Rostock, Germany.
| | - Oliver Stachs
- Department of Ophthalmology, Rostock University Medical Center, 18057 Rostock, Germany.
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16
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Afratis NA, Klepfish M, Karamanos NK, Sagi I. The apparent competitive action of ECM proteases and cross-linking enzymes during fibrosis: Applications to drug discovery. Adv Drug Deliv Rev 2018; 129:4-15. [PMID: 29627371 DOI: 10.1016/j.addr.2018.03.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 02/11/2018] [Accepted: 03/13/2018] [Indexed: 12/12/2022]
Abstract
Progressive loss of organ function in most organs is associated with fibrosis, a tissue state associated with abnormal matrix buildup. If highly progressive, the fibrotic process eventually leads to organ failure and death. Fibrosis is a basic connective tissue lesion defined by the increase in the amount of fibrillar extracellular matrix (ECM) components in a tissue or organ. In addition, intrinsic changes in important structural cells can induce the fibrotic response by regulating the differentiation, recruitment, proliferation and activation of extracellular matrix-producing myofibroblasts. ECM enzymes belonging to the family of matrix metalloproteinases (MMPs) and lysyl oxidases (LOXs) play a crucial role in ECM remodeling and regeneration. MMPs have a catalytic role in degradation of ECM, whereas LOX/LOXLs mediate ECM, especially collagen, cross-linking and stiffening. Importantly, enzymes from both families are elevated during the fibrotic response to tissue injury and its resolution. Yet, the apparent molecular competition or antagonistic activities of these enzyme families during the various stages of fibrosis is often overlooked. In this review, we discuss the diverse roles of MMPs and LOX/LOXL2 in chronic organ fibrosis. Finally, we review contemporary therapeutic strategies for fibrosis treatment, based on neutralization of MMP and LOX activity, as well as the development of novel drug delivery approaches.
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Affiliation(s)
- Nikolaos A Afratis
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Mordehay Klepfish
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Nikos K Karamanos
- Biochemistry, Biochemical Analysis & Matrix Pathobiology Res. Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, Patras 26500, Greece
| | - Irit Sagi
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 7610001, Israel.
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17
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Sundarakrishnan A, Chen Y, Black LD, Aldridge BB, Kaplan DL. Engineered cell and tissue models of pulmonary fibrosis. Adv Drug Deliv Rev 2018; 129:78-94. [PMID: 29269274 DOI: 10.1016/j.addr.2017.12.013] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 11/15/2017] [Accepted: 12/16/2017] [Indexed: 12/11/2022]
Abstract
Pulmonary fibrosis includes several lung disorders characterized by scar formation and Idiopathic Pulmonary Fibrosis (IPF) is a particularly severe form of pulmonary fibrosis of unknown etiology with a mean life expectancy of 3years' post-diagnosis. Treatments for IPF are limited to two FDA approved drugs, pirfenidone and nintedanib. Most lead candidate drugs that are identified in pre-clinical animal studies fail in human clinical trials. Thus, there is a need for advanced humanized in vitro models of the lung to improve candidate treatments prior to moving to human clinical trials. The development of 3D tissue models has created systems capable of emulating human lung structure, function, and cell and matrix interactions. The specific models accomplish these features and preliminary studies conducted using some of these systems have shown potential for in vitro anti-fibrotic drug testing. Further characterization and improvements will enable these tissue models to extend their utility for in vitro drug testing, to help identify signaling pathways and mechanisms for new drug targets, and potentially reduce animal models as standard pre-clinical models of study. In the current review, we contrast different in vitro models based on increasing dimensionality (2D, 2.5D and 3D), with added focus on contemporary 3D pulmonary models of fibrosis.
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Affiliation(s)
| | - Ying Chen
- Department of Biomedical Engineering, Tufts University, Medford, MA, United States
| | - Lauren D Black
- Department of Biomedical Engineering, Tufts University, Medford, MA, United States; Department of Cell, Molecular & Developmental Biology, Sackler School of Graduate Biomedical Sciences, Tufts University, Boston, MA, United States
| | - Bree B Aldridge
- Department of Biomedical Engineering, Tufts University, Medford, MA, United States; Department of Molecular Biology & Microbiology, Sackler School of Graduate Biomedical Sciences, Tufts University, Boston, MA, United States
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA, United States.
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18
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Vongphouttha C, Zhu J, Deng S, Tai W, Wu W, Li Z, Lei W, Wang Y, Dong Z, Zhang T. Rapamycin protects against paraquat-induced pulmonary epithelial-mesenchymal transition via the Wnt/β-catenin signaling pathway. Exp Ther Med 2018; 15:3045-3051. [PMID: 29599839 DOI: 10.3892/etm.2018.5795] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Accepted: 11/17/2017] [Indexed: 12/26/2022] Open
Abstract
Paraquat (PQ) is a herbicide that is widely used in developing countries, and pulmonary fibrosisis one of the most typical features of PQ poisoning. The molecular mechanism underlying PQ toxicity is largely unknown, which makes it difficult to treat. In the present study, western blot analysis, reverse transcription-quantitative polymerase chain reaction and fluorescent immunostaining were used to analyze the effects of rapamycin on PQ-induced epithelial-mesenchymal transition (EMT) in A549 and MRC-5 cells. It was revealed that rapamycin significantly downregulated the mesenchymal cell marker, α-smooth muscle actin, and significantly upregulated the epithelial cell marker, E-cadherin, at mRNA and protein expression levels compared with the PQ group. Treatment with PQ significantly increased Wnt1, low-density lipoprotein receptor-related protein (LRP)5, LRP6 and β-catenin expression levels in A549 cells, while rapamycin significantly inhibited these effects of PQ. Activation of the Wnt signaling pathway using lithium chloride attenuated the inhibitory effects of rapamycin on PQ-induced EMT. In conclusion, rapamycin protects against PQ-induced pulmonary EMT via the Wnt/β-catenin signaling pathway.
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Affiliation(s)
- Chanthasone Vongphouttha
- Department of Respiratory Medicine, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650101, P.R. China
| | - Jie Zhu
- Department of Internal Medicine, Beijing Capital International Airport Hospital, Beijing 100621, P.R. China
| | - Shuhao Deng
- Department of Respiratory Medicine, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650101, P.R. China
| | - Wenlin Tai
- Department of Clinical Laboratory, Yunnan Molecular Diagnostic Center, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650101, P.R. China
| | - Wenjuan Wu
- Department of Respiratory Medicine, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650101, P.R. China
| | - Zhenkun Li
- Department of Respiratory Medicine, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650101, P.R. China
| | - Wen Lei
- Department of Respiratory Medicine, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650101, P.R. China
| | - Yin Wang
- Department of Respiratory Medicine, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650101, P.R. China
| | - Zhaoxing Dong
- Department of Respiratory Medicine, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650101, P.R. China
| | - Tao Zhang
- Department of Respiratory Medicine, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650101, P.R. China
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19
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Lu J, Qian Y, Jin W, Tian R, Zhu Y, Wang J, Meng X, Wang R. Hypoxia-inducible factor-1α regulates epithelial-to-mesenchymal transition in paraquat-induced pulmonary fibrosis by activating lysyl oxidase. Exp Ther Med 2017; 15:2287-2294. [PMID: 29467842 PMCID: PMC5792814 DOI: 10.3892/etm.2017.5677] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 10/25/2017] [Indexed: 12/20/2022] Open
Abstract
Pulmonary fibrosis (PF) is one of the most prevalent causes of death following paraquat (PQ) poisoning. As demonstrated in previous studies by the present authors, epithelial-to-mesenchymal transition (EMT) is associated with PQ-induced PF. In addition, hypoxia-inducible factor-1α (HIF-1α) and lysyl oxidase (LOX) promote EMT following PQ poisoning. However, the association between HIF-1α- and LOX-mediated regulation of EMT remains unclear. The present study investigated the association between HIF-1α and LOX with regard to PQ-induced EMT. A549 and RLE-6TN cells were treated with PQ, and HIF-1α and LOX expression was silenced with short interfering RNAs. Changes in the expression of HIF-1α, LOX, β-catenin and EMT-related makers were detected using real-time quantitative polymerase chain reaction, immunofluorescence, and western blotting. HIF-1α and LOX were associated with PQ-induced EMT, and their expression levels were significantly increased (P<0.05). LOX expression was significantly decreased following PQ poisoning when HIF-1α expression was inhibited (P<0.05). However, the level of HIF-1α did not change significantly when LOX was silenced. The expression level of β-catenin and the degree of EMT were significantly decreased following HIF-1α and LOX silencing in both cell lines (P<0.05). The association between HIF-1α and LOX in regulating EMT during PQ-induced PF may be unidirectional. HIF-1α may regulate PQ-induced EMT through the LOX/β-catenin pathway.
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Affiliation(s)
- Jian Lu
- Department of Critical Care Medicine, Shanghai General Hospital of Nanjing Medical University, Shanghai 201620, P.R. China
| | - Yongbing Qian
- Department of Critical Care Medicine, Shanghai General Hospital of Nanjing Medical University, Shanghai 201620, P.R. China
| | - Wei Jin
- Department of Critical Care Medicine, Shanghai General Hospital of Nanjing Medical University, Shanghai 201620, P.R. China
| | - Rui Tian
- Department of Critical Care Medicine, Shanghai General Hospital of Nanjing Medical University, Shanghai 201620, P.R. China
| | - Yong Zhu
- Department of Critical Care Medicine, Shanghai General Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai 201620, P.R. China
| | - Jinfeng Wang
- Department of Critical Care Medicine, Shanghai General Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai 201620, P.R. China
| | - Xiaoxiao Meng
- Department of Critical Care Medicine, Shanghai General Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai 201620, P.R. China
| | - Ruilan Wang
- Department of Critical Care Medicine, Shanghai General Hospital of Nanjing Medical University, Shanghai 201620, P.R. China
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20
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NLRP3 participates in the regulation of EMT in bleomycin-induced pulmonary fibrosis. Exp Cell Res 2017; 357:328-334. [DOI: 10.1016/j.yexcr.2017.05.028] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 05/18/2017] [Accepted: 05/31/2017] [Indexed: 12/23/2022]
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21
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Rodriguez D, Braden BP, Boyer SW, Taketa DA, Setar L, Calhoun C, Maio AD, Langenbacher A, Valentine MT, De Tomaso AW. In vivo manipulation of the extracellular matrix induces vascular regression in a basal chordate. Mol Biol Cell 2017; 28:1883-1893. [PMID: 28615322 PMCID: PMC5541839 DOI: 10.1091/mbc.e17-01-0009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 06/05/2017] [Accepted: 06/05/2017] [Indexed: 01/07/2023] Open
Abstract
We investigated the physical role of the extracellular matrix (ECM) in vascular homeostasis in the basal chordate Botryllus schlosseri, which has a large, transparent, extracorporeal vascular network encompassing an area >100 cm2 We found that the collagen cross-linking enzyme lysyl oxidase is expressed in all vascular cells and that in vivo inhibition using β-aminopropionitrile (BAPN) caused a rapid, global regression of the entire network, with some vessels regressing >10 mm within 16 h. BAPN treatment changed the ultrastructure of collagen fibers in the vessel basement membrane, and the kinetics of regression were dose dependent. Pharmacological inhibition of both focal adhesion kinase (FAK) and Raf also induced regression, and levels of phosphorylated FAK in vascular cells decreased during BAPN treatment and FAK inhibition but not Raf inhibition, suggesting that physical changes in the vessel ECM are detected via canonical integrin signaling pathways. Regression is driven by apoptosis and extrusion of cells through the basal lamina, which are then engulfed by blood-borne phagocytes. Extrusion and regression occurred in a coordinated manner that maintained vessel integrity, with no loss of barrier function. This suggests the presence of regulatory mechanisms linking physical changes to a homeostatic, tissue-level response.
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Affiliation(s)
- Delany Rodriguez
- Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA 93106
| | - Brian P Braden
- Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA 93106
| | - Scott W Boyer
- Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA 93106
| | - Daryl A Taketa
- Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA 93106
| | - Leah Setar
- Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA 93106
| | - Chris Calhoun
- Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA 93106
| | - Alessandro Di Maio
- Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA 93106
| | - Adam Langenbacher
- Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA 93106
| | - Megan T Valentine
- Department of Mechanical Engineering, University of California, Santa Barbara, Santa Barbara, CA 93106
| | - Anthony W De Tomaso
- Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA 93106
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22
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Trackman PC. Lysyl Oxidase Isoforms and Potential Therapeutic Opportunities for Fibrosis and Cancer. Expert Opin Ther Targets 2016; 20:935-45. [PMID: 26848785 DOI: 10.1517/14728222.2016.1151003] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
INTRODUCTION The lysyl oxidase family of enzymes is classically known as being required for connective tissue maturation by oxidizing lysine residues in elastin and lysine and hydroxylysine residues in collagen precursors. The resulting aldehydes then participate in cross-link formation, which is required for normal connective tissue integrity. These enzymes have biological functions that extend beyond this fundamental biosynthetic role, with contributions to angiogenesis, cell proliferation, and cell differentiation. Dysregulation of lysyl oxidases occurs in multiple pathologies including fibrosis, primary and metastatic cancers, and complications of diabetes in a variety of tissues. AREAS COVERED This review summarizes the major findings of novel roles for lysyl oxidases in pathologies, and highlights some of the potential therapeutic approaches that are in development and which stem from these new findings. EXPERT OPINION Fundamental questions remain regarding the mechanisms of novel biological functions of this family of proteins, and regarding functions that are independent of their catalytic enzyme activity. However, progress is underway in the development of isoform-specific pharmacologic inhibitors, potential therapeutic antibodies and gaining an increased understanding of both tumor suppressor and metastasis promotion activities. Ultimately, this is likely to lead to novel therapeutic agents.
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Affiliation(s)
- Philip C Trackman
- a Department of Molecular and Cell Biology , Boston University, Henry M. Goldman School of Dental Medicine , Boston , MA , USA
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