1
|
Li LY, Zhou YT, Sun L, Liu XY, Li J, Hong Y, Ye XY, Bao Q, Meng QX, Wen WP, Chen HX, Li CW. Downregulation of MCM2 contributes to the reduced growth potential of epithelial progenitor cells in chronic nasal inflammation. J Allergy Clin Immunol 2020; 147:1966-1973.e3. [PMID: 33279575 DOI: 10.1016/j.jaci.2020.11.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 10/15/2020] [Accepted: 11/10/2020] [Indexed: 01/09/2023]
Abstract
BACKGROUND Recent studies have shown that human nasal epithelial progenitor cells (hNEPCs) are characterized by poor proliferation capacities during chronic nasal inflammation. OBJECTIVE We sought to investigate the key molecular functions and candidates that contribute to the reduced growth potential of hNEPCs in chronically inflamed nasal mucosa. METHODS Nasal biopsy specimens were obtained from 28 patients with nasal polyps (NPs) and 13 healthy controls. hNEPCs from nasal samples were cultured for 3 consecutive passages, and their molecular and functional profiles were analyzed by RNA sequencing. The minichromosome maintenance protein (MCM) family gene MCM2 was validated in hNEPCs and tissue samples from patients with NPs and control subjects by cell cycle, quantitative PCR, and Western blot analyses; small interfering RNA-mediated knockdown assay; and immunofluorescent staining. RESULTS Compared with control hNEPCs, NP-derived hNEPCs showed (1) reduced growth kinetics, as evidenced by the colony-forming efficiency and doubling time; (2) inhibited cell cycle progression, as evidenced by gene ontology and/or pathway and cell cycle analyses; and (3) downregulated expression of MCM2, the key protein of the MCM complex, which is critical for DNA replication at the G1/S checkpoint. Moreover, hNEPCs with MCM2 knockdown showed a decreased proliferation rate, and the MCM2 protein level in basal cells was significantly lower in abnormally remodeled nasal epithelium than in normal epithelium. CONCLUSION These results demonstrate inhibited cell cycle progression and MCM2 downregulation in basal or progenitor nasal epithelial cells from NP tissue, which may contribute to the decreased growth potential of hNEPCs in chronically inflamed upper airways.
Collapse
Affiliation(s)
- Li Yue Li
- Department of Otolaryngology, Guangzhou Key Laboratory of Otorhinolaryngology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Yu Tao Zhou
- Department of Otolaryngology, Guangzhou Key Laboratory of Otorhinolaryngology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Lin Sun
- Department of Otolaryngology, Guangzhou Key Laboratory of Otorhinolaryngology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Xin Yi Liu
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, China
| | - Jian Li
- Department of Otolaryngology, Guangzhou Key Laboratory of Otorhinolaryngology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Yue Hong
- School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xiao Yan Ye
- Department of Otolaryngology, Guangzhou Key Laboratory of Otorhinolaryngology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Qing Bao
- Department of Otolaryngology, Guangzhou Key Laboratory of Otorhinolaryngology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Qing Xiang Meng
- Department of Otorhinolaryngology Head and Neck Surgery, Guangzhou First People's Hospital, Guangzhou, China
| | - Wei Ping Wen
- Department of Otolaryngology, Guangzhou Key Laboratory of Otorhinolaryngology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - He Xin Chen
- Department of Otolaryngology, Guangzhou Key Laboratory of Otorhinolaryngology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Chun Wei Li
- Department of Otolaryngology, Guangzhou Key Laboratory of Otorhinolaryngology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China.
| |
Collapse
|
2
|
Zheng Q, Dai X, Fang W, Zheng Y, Zhang J, Liu Y, Gu D. Overexpression of microRNA-367 inhibits angiogenesis in ovarian cancer by downregulating the expression of LPA1. Cancer Cell Int 2020; 20:476. [PMID: 33024414 PMCID: PMC7531134 DOI: 10.1186/s12935-020-01551-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Accepted: 09/10/2020] [Indexed: 02/07/2023] Open
Abstract
Background Compelling evidences reported the role of microRNAs (miRNAs) in ovarian cancer. However, little was known regarding the molecular mechanism of miR-367 in ovarian cancer. This study intended to investigate the role and regulatory mechanism of miR-367 in ovarian cancer involving lysophosphatidic acid receptor-1 (LPA1). Methods Potentially regulatory miRNAs in ovarian cancer were obtained from bioinformatics analysis. RT-qPCR was used to detect miR-367 expression in both ovarian cancer tissues and relevant adjacent normal tissues. Relationship between miR-367 and LPA1 was predicted by miRNA database and further verified using dual luciferase reporter gene assay and RIP. EdU and Transwell assay were used to measure the proliferation and invasion ability of cells. Moreover, tube formation and chick chorioallantois membrane (CAM) assay were performed to determine angiogenesis of human umbilical vein endothelial cells (HUVECs). Finally, the roles of LPA1 in tumor growth was also studied using nude mice xenograft assay. Results High expression of LPA1 and low expression of miR-367 were observed in ovarian cancer tissues and cells. Overexpressed miR-367 downregulated LPA1 expression to inhibit proliferation, invasion, and angiogenesis of cancer cells. Low expression of LPA1 suppressed tumor formation and repressed angiogenesis in ovarian in vivo. Conclusion All in all, overexpression of miR-367 downregulated LPA1 expression to inhibit ovarian cancer progression, which provided a target for the cancer treatment.
Collapse
Affiliation(s)
- Qingling Zheng
- Department of Obstetrics and Gynecology, School of Medicine and Nursing Sciences, Huzhou University, Huzhou Central Hospital, Huzhou, 313000 People's Republic of China
| | - Xin Dai
- Department of Pathology, The Affiliated Suzhou Science & Technology Town Hospital of Nanjing Medical University, No. 1, Lijiang Road, Huqiu District, Suzhou, 215153 Jiangsu People's Republic of China
| | - Wei Fang
- Department of Pathology, Huzhou Central Hospital, Huzhou, 313000 People's Republic of China
| | - Yan Zheng
- Department of Pathology, Huzhou Central Hospital, Huzhou, 313000 People's Republic of China
| | - Jin Zhang
- Department of Pathology, The Affiliated Suzhou Science & Technology Town Hospital of Nanjing Medical University, No. 1, Lijiang Road, Huqiu District, Suzhou, 215153 Jiangsu People's Republic of China
| | - Yanxiang Liu
- Department of Pathology, The Affiliated Suzhou Science & Technology Town Hospital of Nanjing Medical University, No. 1, Lijiang Road, Huqiu District, Suzhou, 215153 Jiangsu People's Republic of China
| | - Donghua Gu
- Department of Pathology, The Affiliated Suzhou Science & Technology Town Hospital of Nanjing Medical University, No. 1, Lijiang Road, Huqiu District, Suzhou, 215153 Jiangsu People's Republic of China
| |
Collapse
|
3
|
Abstract
Thymoma represents the most common anterior mediastinal compartment neoplasm, originating from the epithelial cell population in the thymus. Various histological types of thymoma feature different clinical characteristics. Furthermore, thymoma is frequently associated with autoimmune disorders, esp. myasthenia gravis (MG). However, the underlying molecular tumourigenesis of thymoma remains largely unknown. The goal of our current study is to demonstrate the underlying genetic abberations in thymoma, so as to understand the possible cause of MG in thymoma patients. By using CapitalBio mRNA microarray analysis, we analyzed 31 cases of thymoma including 5 cases of type AB thymoma, 6 B1-type cases, 12 B2-type cases, 5 B2B3-type cases and 3 type-B3 cases. 6 cases of thymoma were not associated with myasthenia gravis, while 25 cases were with myasthenia gravis. By comparisons between thymoma and the paratumoral tissues, differentially expressed genes were identified preliminarily. Among them, 292 genes increased more than 2-fold, 2 genes more than 5-fold. On the other hand, 596 genes were decreased more than 2-fold, 6 genes more than 20-fold. Interestingly, among these genes upregulated more than 2-fold, 6 driver genes (FANCI, NCAPD3, NCAPG, OXCT1, EPHA1 and MCM2) were formerly reported as driver oncogenes. This microarray results were further confirmed through real-time PCR. 8 most dysregulated genes were verified: E2F2, EPHA1, CCL25 and MCM2 were upregulated; and IL6, FABP4, CD36 and MYOC were downregulated. Supervised clustering heat map analysis of 2-fold upregulated and 2-fold downregulated genes revealed 6 distinct clusters. Strikingly, we found that cluster 1 was composed of two type-B2 thymoma; and cluster 6 was three type-B2/B3 thymoma. KEGG database analysis revealed possible genetic mechanisms of thymoma and functional process. We further compared gene expression pattern between thymoma with and without MG, and found 5 genes were upregulated more than 2-fold, more than 30 genes were downregulated more than 2-fold. KEGG analysis revealed 2 important signaling pathways with more than 2-fold upregulated genes (TGF- beta signaling pathway and HTLV-I signaling pathway) as differially functioning between MG positive and negative thymomas. Real-time PCR analysis confirmed that CCL25 was upregulated; and MYC, GADD45B, TNFRSF12 downregulated in thymoma with MG. Our study thus provided important genetic information on thymoma. It shed light on the molecular bases for analyzing the functional process of thymoma and finding potential biomarkers for pathological categorizing and treatment. Our work may provide important clues in understanding possible causes of MG in thymoma patients.
Collapse
|