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Guo B, Liu W, Ji X, Xi B, Meng X, Xie W, Sun Y, Zhang M, Liu P, Zhang W, Yan X, Chen B. CSF3 aggravates acute exacerbation of pulmonary fibrosis by disrupting alveolar epithelial barrier integrity. Int Immunopharmacol 2024; 135:112322. [PMID: 38788452 DOI: 10.1016/j.intimp.2024.112322] [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: 03/14/2024] [Revised: 05/03/2024] [Accepted: 05/19/2024] [Indexed: 05/26/2024]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a chronic and progressive respiratory disorder characterized by poor prognosis, often presenting with acute exacerbation. The primary cause of death associated with IPF is acute exacerbation of IPF (AE-IPF). However, the pathophysiology of acute exacerbation has not been clearly elucidated yet. This study aims to investigate the underlying pathophysiological molecular mechanism in a mouse AE-PF model. C57BL/6J mice were intratracheally administered bleomycin (BLM, 5 mg/kg) to induce pulmonary fibrosis. After 14 days, lipopolysaccharide (LPS, 2 mg/kg) was injected via the trachea route. Histological assessments, including H&E and Masson staining, as well as inflammatory indicators, were included to evaluate the induction of AE-PF by BLM and LPS in mice. Transcriptomic profiling of pulmonary tissues identified CSF3 as one of the top 10 upregulated DEGs in AE-PF mice. Indeed, administration of exogenous CSF3 protein exacerbated AE-PF in mice. Mechanistically, CSF3 disrupted alveolar epithelial barrier integrity and permeability by regulating specialized cell adhesion complexes such as tight junctions (TJs) and adherens junctions (AJs) via PI3K/p-Akt/Snail pathway, contributing to the aggravation of AE-PF in mice. Moreover, the discovery of elevated sera CSF3 indicated a notable increase in IPF patients during the exacerbation of the disease. Pearson correlation analysis in IPF patients revealed significant positive associations between CSF3 levels and KL-6 levels, LDH levels, CRP levels, respectively. These results provide mechanistic insights into the role of CSF3 in exacerbating of lung fibrotic disease and indicate monitoring CSF3 levels may aid in early clinical decisions for alternative therapy in the management of rapidly progressing IPF.
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Affiliation(s)
- Bingnan Guo
- The Laboratory of Emergency Medicine, School of Second Clinical Medicine, Xuzhou Medical University, Department of Emergency Medicine, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221000, China
| | - Wenwen Liu
- Department of Respiratory and Critical Care Medicine, the Affiliated Hospital of Xuzhou Medical University, Department of Respiratory Medicine, School of First Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu 221000, China
| | - Xuan Ji
- Department of Respiratory and Critical Care Medicine, the Affiliated Hospital of Xuzhou Medical University, Department of Respiratory Medicine, School of First Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu 221000, China; Department of Respiratory Medicine, Yancheng Third People's Hospital, Yancheng, Jiangsu 224000, China
| | - Bin Xi
- Department of Respiratory and Critical Care Medicine, the Affiliated Hospital of Xuzhou Medical University, Department of Respiratory Medicine, School of First Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu 221000, China
| | - Xiao Meng
- Department of Respiratory and Critical Care Medicine, the Affiliated Hospital of Xuzhou Medical University, Department of Respiratory Medicine, School of First Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu 221000, China
| | - Wanwan Xie
- Department of Respiratory and Critical Care Medicine, the Affiliated Hospital of Xuzhou Medical University, Department of Respiratory Medicine, School of First Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu 221000, China
| | - Yitian Sun
- Department of Respiratory and Critical Care Medicine, the Affiliated Hospital of Xuzhou Medical University, Department of Respiratory Medicine, School of First Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu 221000, China
| | - Maowei Zhang
- Department of Respiratory and Critical Care Medicine, the Affiliated Hospital of Xuzhou Medical University, Department of Respiratory Medicine, School of First Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu 221000, China
| | - Pingli Liu
- Department of Respiratory and Critical Care Medicine, the Affiliated Hospital of Xuzhou Medical University, Department of Respiratory Medicine, School of First Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu 221000, China
| | - Wenhui Zhang
- Department of Respiratory and Critical Care Medicine, the Affiliated Hospital of Xuzhou Medical University, Department of Respiratory Medicine, School of First Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu 221000, China
| | - Xianliang Yan
- The Laboratory of Emergency Medicine, School of Second Clinical Medicine, Xuzhou Medical University, Department of Emergency Medicine, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221000, China; Department of Emergency Medicine, Suining People's Hospital, Xuzhou 221225, Jiangsu, China.
| | - Bi Chen
- Department of Respiratory and Critical Care Medicine, the Affiliated Hospital of Xuzhou Medical University, Department of Respiratory Medicine, School of First Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu 221000, China.
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Macrophage depletion disrupts immune balance and energy homeostasis. PLoS One 2014; 9:e99575. [PMID: 24911652 PMCID: PMC4049836 DOI: 10.1371/journal.pone.0099575] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Accepted: 05/16/2014] [Indexed: 12/31/2022] Open
Abstract
Increased macrophage infiltration in tissues including white adipose tissue and skeletal muscle has been recognized as a pro-inflammatory factor that impairs insulin sensitivity in obesity. However, the relationship between tissue macrophages and energy metabolism under non-obese physiological conditions is not clear. To study a homeostatic role of macrophages in energy homeostasis, we depleted tissue macrophages in adult mice through conditional expression of diphtheria toxin (DT) receptor and DT-induced apoptosis. Macrophage depletion robustly reduced body fat mass due to reduced energy intake. These phenotypes were reversed after macrophage recovery. As a potential mechanism, severe hypothalamic and systemic inflammation was induced by neutrophil (NE) infiltration in the absence of macrophages. In addition, macrophage depletion dramatically increased circulating granulocyte colony-stimulating factor (G-CSF) which is indispensable for NE production and tissue infiltration. Our in vitro study further revealed that macrophages directly suppress G-CSF gene expression. Therefore, our study indicates that macrophages may play a critical role in integrating immune balance and energy homeostasis under physiological conditions.
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Ishida K, Matsumoto T, Sasaki K, Mifune Y, Tei K, Kubo S, Matsushita T, Takayama K, Akisue T, Tabata Y, Kurosaka M, Kuroda R. Bone regeneration properties of granulocyte colony-stimulating factor via neovascularization and osteogenesis. Tissue Eng Part A 2011; 16:3271-84. [PMID: 20626235 DOI: 10.1089/ten.tea.2009.0268] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVES It has been well recognized that appropriate vascularization is emerging as a prerequisite for bone development and regeneration. The aim of this study was to test the hypothesis that locally applied granulocyte colony-stimulating factor (G-CSF) enhances bone regeneration via revascularization and osteogenesis. METHODS A segmental bone defect (20mm) was created at the diaphysis of the rabbit ulna. The defects were treated with cationized gelatin hydrogel, which was the drug delivery system, with G-CSF, and then bone regeneration, neovascularization, and osteogenesis properties with G-CSF were assessed. RESULTS Radiographic, computed tomography, and histological findings revealed that bone formation was significantly promoted in G-CSF-treated group as early as 2 weeks. Immunohistochemistry, real-time reverse transcription-polymerase chain reaction, and flow cytometry studies indicated that angiogenesis/vasculogenesis, which are regulated by mobilization and incorporation of CD34+/G-CSF receptor (CSFR+) cells, and osteogenesis, which is regulated by osteocalcin+/G-CSFR+ cells, were also significantly enhanced in the G-CSF group. CONCLUSIONS This study suggests that locally applied G-CSF contributes to an ideal local environment for fracture healing by supplying adequate blood flow and stimulating osteogenesis. G-CSF may have the therapeutic potential for bone regeneration.
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Affiliation(s)
- Kazunari Ishida
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
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Kaygusuz MA, Turan CC, Aydin NE, Temel I, Firat S, Bulut T, Kuku I. The effects of G-CSF and naproxen sodium on the serum TGF-beta1 level and fracture healing in rat tibias. Life Sci 2006; 80:67-73. [PMID: 17023006 DOI: 10.1016/j.lfs.2006.08.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2005] [Revised: 07/17/2006] [Accepted: 08/18/2006] [Indexed: 11/24/2022]
Abstract
Local and systemic release of transforming growth factor beta 1 (TGF-beta1) is known to increase during the process of fracture healing and this cytokine stimulates bone healing. The majority of the non steroidal anti inflammatory drugs (NSAIDs) inhibit fracture healing. Granulocyte colony stimulating factor (G-CSF) is a hematopoietic growth factor that stimulates bone marrow. In this study, the effects of the NSAID naproxen sodium, G-CSF, and both of them in combination on the TGF-beta1 serum level in rats with tibia fractures were measured and fracture healing was evaluated by histopathologic and radiologic examination. The TGF-beta1 serum levels obtained on day one (24 h after fracture but before administration of naproxen or G-CSF) were found to be similar in all of the five groups (p > 0.05). At the end of the first week, TGF-beta1 levels were significantly lower in naproxen-treated rats than those of the other groups excluding control (p = 0.002). Similar changes in TGF-beta1 levels were found at the end of the second and fourth weeks. TGF-beta1 levels were significantly higher in G-CSF-treated rats at the end of the first, second and fourth weeks (p < 0.05). Fracture healing scores measured with histopathological and radiological methods were higher in G-CSF-treated rats than in naproxen-treated ones. When both naproxen and G-CSF were given, the scores resumed to normal. The results point to the negative effect of naproxen sodium on fracture healing is due to its decreasing effect on the level of TGF-beta1, which may be a new possible mechanism. Moreover, this negative effect can be inhibited by the use of G-CSF.
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Affiliation(s)
- M Akif Kaygusuz
- Inonu University Medical Faculty, Department of Orthopedics, Malatya, Turkey.
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