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Chen Z, Shang Y, Duan W, Zhu L, Ji X, Gong S, Xiang X. Androgens have therapeutic potential in T2 asthma by mediating METTL3 in bronchial epithelial cells. Int Immunopharmacol 2024; 143:113322. [PMID: 39369464 DOI: 10.1016/j.intimp.2024.113322] [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: 06/26/2024] [Revised: 09/21/2024] [Accepted: 10/01/2024] [Indexed: 10/08/2024]
Abstract
Studies have shown that androgens can alleviate the symptoms of T2 asthma and are inversely correlated with the severity of allergic asthma. METTL3, a crucial component of m6A modification, mitigates the development of T2 asthma by inhibiting Th2 cell differentiation. However, the impact of androgens, such as dihydrotestosterone (DHT), on the progression of T2 asthma through METTL3 has yet to be investigated. At the clinical level, patients with T2 asthma exhibited reduced levels of DHT and METTL3 mRNA, along with increased levels of 17β-estradiol (E2). DHT and METTL3 were found to be negatively associated with the severity of T2 asthma, while E2 was positively associated with it. Administration of DHT and E2 in induced T2 asthma mouse models showed that DHT improved lung function, reduced airway inflammation, and inhibited Th2 cell differentiation. Interestingly, DHT reversed the damage to METTL3, whereas E2 had the opposite effect. In vitro studies of mouse bronchial epithelial cells (BECs) confirmed that METTL3-dependent m6A modification inhibited the T2 inflammatory response, and DHT inhibited Th2 cell differentiation in T2 asthma by promoting METTL3 expression in BECs. In conclusion, our study suggests that DHT has therapeutic potential for T2 asthma by regulating METTL3 in BECs.
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Affiliation(s)
- Zhifeng Chen
- Department of Respiratory and Critical Care Medicine, The Second Xiangya Hospital, Central South University, 139 Middle Renmin Road, Changsha, Hunan 410011, China
| | - Yulin Shang
- Ophthalmology and Otorhinolaryngology, Zigui County Traditional Chinese Medicine Hospital, 30 Pinghu Avenue, Zigui, Hubei 443600, China
| | - Wentao Duan
- Department of Respiratory and Critical Care Medicine, Hunan Provincial People's Hospital, 61 West Jiefang Road, Changsha, Hunan 410005, China
| | - Liming Zhu
- Department of Respiratory and Critical Care Medicine, Hunan Provincial People's Hospital, 61 West Jiefang Road, Changsha, Hunan 410005, China
| | - Xiaoying Ji
- Department of Respiratory and Critical Care Medicine, The Affiliated Hospital of Guizhou Medical University, 28 Guiyi Street, Guiyang, Guizhou 550004, China.
| | - Subo Gong
- Department of Geriatrics, The Second Xiangya Hospital, Central South University, 139 Middle Renmin Road, Changsha, Hunan 410011, China.
| | - Xudong Xiang
- Department of Emergency, The Second Xiangya Hospital, Central South University, 139 Middle Renmin Road, Changsha, Hunan 410011, China.
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Chen Z, Shang Y, Zhang X, Duan W, Li J, Zhu L, Ma L, Xiang X, Jia J, Ji X, Gong S. METTL3 mediates SOX5 m6A methylation in bronchial epithelial cells to attenuate Th2 cell differentiation in T2 asthma. Heliyon 2024; 10:e28884. [PMID: 38601672 PMCID: PMC11004579 DOI: 10.1016/j.heliyon.2024.e28884] [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: 01/26/2024] [Revised: 03/22/2024] [Accepted: 03/26/2024] [Indexed: 04/12/2024] Open
Abstract
Objective Asthma, a chronic inflammatory disease in which type 2 T helper cells (Th2) play a causative role in the development of T2 asthma. N6-methyladenosine (m6A) modification, an mRNA modification, and methyltransferase-like 3 (METTL3) is involved in the development of T2 asthma by inhibiting Th2 cell differentiation. Sex determining region Y-box protein 5 (SOX5) is involved in regulating T cell differentiation, but its role in T2 asthma was unclear. The objective of this study was to explore the role of METTL3 and SOX5 in T2 asthma and whether there is an interaction between the two. Materials and methods Adults diagnosed with T2 asthma (n = 14) underwent clinical information collection and pulmonary function tests. In vivo and in vitro T2 asthma models were established using female C57BL/6 mice and human bronchial epithelial cells (HBE). The expressions of METTL3 and SOX5 were detected by Western blot and qRT-PCR and Western blot. Th2 cell differentiation was determined by flow cytometry and IL-4 level was detected by ELISA. m6A methylation level was determined by m6A quantitative assay. The relationship between METTL3 expression and clinical parameters was determined by Spearman rank correlation analysis. The function of METTL3 and SOX5 genes in asthma was investigated in vitro and in vivo. The RNA immunoprecipitation assay detected the specific interaction between METTL3 and SOX5. Results Patients with T2 asthma displayed lower METTL3 levels compared to healthy controls. Within this group, a negative correlation was observed between METTL3 and Th2 cells, while a positive correlation was noted between METTL3 and clinical parameters as well as Th1 cells. In both in vitro and in vivo models representing T2 asthma, METTL3 levels decreased significantly, while SOX5 levels showed the opposite trend. Overexpression of METTL3 gene in HBE cells significantly inhibited Th2 cell differentiation and increased m6A methylation activity. From a mechanism perspective, low METTL3 negatively regulates SOX5 expression through m6A modification dependence, while high SOX5 expression is positively associated with T2 asthma severity. Cell transfection experiments confirmed that METTL3 regulates Th2 cell differentiation and IL-4 release through SOX5. Conclusions Overall, our results indicate that METTL3 alleviates Th2 cell differentiation in T2 asthma by modulating the m6A methylation activity of SOX5 in bronchial epithelial cells. This mechanism could potentially serve as a target for the prevention and management of T2 asthma.
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Affiliation(s)
- Zhifeng Chen
- Department of Respiratory and Critical Care Medicine, The Second Xiangya Hospital, Central South University, 139 Middle Renmin Road, Changsha, Hunan, 410011, China
| | - Yulin Shang
- Ophthalmology and Otorhinolaryngology, Zigui County Traditional Chinese Medicine Hospital, 30 Pinghu Avenue, Zigui, Hubei, 443600, China
| | - Xiufeng Zhang
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Hainan Medical University, 48 Pak Shui Tong Road, Haikou, Hainan, 570000, China
| | - Wentao Duan
- Department of Respiratory and Critical Care Medicine, Hunan Provincial People's Hospital, 61 West Jiefang Road, Changsha, Hunan, 410005, China
| | - Jianmin Li
- Department of Respiratory and Critical Care Medicine, Hunan Provincial People's Hospital, 61 West Jiefang Road, Changsha, Hunan, 410005, China
| | - Liming Zhu
- Department of Respiratory and Critical Care Medicine, Hunan Provincial People's Hospital, 61 West Jiefang Road, Changsha, Hunan, 410005, China
| | - Libing Ma
- Department of Respiratory and Critical Care Medicine, The Affiliated Hospital of Guilin Medical University, 15 Le Qun Road, Guilin, Guangxi, 541001, China
| | - Xudong Xiang
- Department of Emergency, The Second Xiangya Hospital, Central South University, 139 Middle Renmin Road, Changsha, Hunan, 410011, China
| | - Jingsi Jia
- Department of Emergency, The Second Xiangya Hospital, Central South University, 139 Middle Renmin Road, Changsha, Hunan, 410011, China
| | - Xiaoying Ji
- Department of Respiratory and Critical Care Medicine, The Affiliated Hospital of Guizhou Medical University, 28 Guiyi Street, Guiyang, Guizhou, 550004, China
| | - Subo Gong
- Department of Geriatrics, The Second Xiangya Hospital, Central South University, 139 Middle Renmin Road, Changsha, Hunan, 410011, China
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Wang H, Zuo S, Zheng J, Peng Z, Yao X, Wang J, Weber HC, Qin X, Xiang Y, Liu C, Ji M, Liu H, Pan L, Qu X. Knockout of the BRAP homolog in mice leads to abnormal tracheal cilia. FEBS Lett 2023; 597:2626-2642. [PMID: 37715941 DOI: 10.1002/1873-3468.14734] [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: 03/24/2023] [Revised: 06/29/2023] [Accepted: 07/08/2023] [Indexed: 09/18/2023]
Abstract
Both bombesin receptor-activated protein (BRAP) and its mouse homolog have been found to be expressed in bronchial epithelia but with unclear functions. Using electron microscopy combined with histological assays, we found that BRAP homolog deficiency in mice led to abnormal tracheal cilia. Rab-3A-interacting protein (Rabin8), a protein that might play a role in cilia development, was screened by yeast two-hybrid and further verified to have interaction with human BRAP by co-immunoprecipitation and pulldown assays. The expression levels of Rabin8, together with acetylated α-tubulin, a marker of cilia, were either downregulated by knockdown of BRAP or upregulated by overexpression of BRAP in cultured immortalized human bronchial epithelial cells. These results reveal a role for BRAP in airway cilia formation.
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Affiliation(s)
- Hui Wang
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Suhui Zuo
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Jiaoyun Zheng
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Zhi Peng
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Xueping Yao
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
- Functional Center, School of Basic Medical Sciences, Xinjiang Medical University, Urumqi, China
| | - Jie Wang
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Horst Christian Weber
- Section of Gastroenterology, and Department of Pathology and Laboratory Medicine, Boston University School of Medicine, MA, USA
| | - Xiaoqun Qin
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Yang Xiang
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Chi Liu
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Ming Ji
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Huijun Liu
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Lang Pan
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Xiangping Qu
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
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Yao X, Qin X, Wang H, Zheng J, Peng Z, Wang J, Weber HC, Liu R, Zhang W, Zeng J, Zuo S, Chen H, Xiang Y, Liu C, Liu H, Pan L, Qu X. Lack of bombesin receptor-activated protein homologous protein impairs hippocampal synaptic plasticity and promotes chronic unpredictable mild stress induced behavioral changes in mice. Stress 2023; 26:1-14. [PMID: 36520154 DOI: 10.1080/10253890.2022.2155513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Bombesin receptor-activated protein (BRAP) and its homologous protein in mice, which is encoded by bc004004 gene, were expressed abundantly in brain tissues with unknown functions. We treated bc004004-/- mice with chronic unpredictable mild stress (CUMS) to test whether those mice were more vulnerable to stress-related disorders. The results of forced swimming test, sucrose preference test, and open field test showed that after being treated with CUMS for 28 days or 35 days both bc004004-/- and bc004004+/+ mice exhibited behavioural changes and there was no significant difference between bc004004+/+ and bc004004-/-. However, behavioural changes were observed only in bc004004-/- mice after being exposed to CUMS for 21 days, but not in bc004004+/+ after 21-day CUMS exposure, indicating that lack of BRAP homologous protein may cause vulnerability to stress-related disorders in mice. In addition, bc004004-/- mice showed a reduction in recognition memory as revealed by novel object recognition test. Since memory changes and stress related behavioural changes are all closely related to the hippocampus function we further analyzed the changes of dendrites and synapses of hippocampal neurons as well as expression levels of some proteins closely related to synaptic function. bc004004-/- mice exhibited decreased dendritic lengths and increased amount of immature spines, as well as altered expression pattern of synaptic related proteins including GluN2A, synaptophysin and BDNF in the hippocampus. Those findings suggest that BRAP homologous protein may have a protective effect on the behavioural response to stress via regulating dendritic spine formation and synaptic plasticity in the hippocampus.
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Affiliation(s)
- Xueping Yao
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, Hunan,China
- Department of Functional Center, Basic Medical Sciences, Xinjiang Medical University, Xinjiang, China
| | - Xiaoqun Qin
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, Hunan,China
| | - Hui Wang
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, Hunan,China
| | - Jiaoyun Zheng
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Zhi Peng
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, Hunan,China
| | - Jie Wang
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, Hunan,China
| | - Horst Christian Weber
- Section of Gastroenterology, Department of Pathology and Laboratory Medicine, Boston University School of Medicine, Boston, MA, USA
| | - Rujiao Liu
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, Hunan,China
| | - Wenrui Zhang
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, Hunan,China
| | - Ji Zeng
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, Hunan,China
| | - Suhui Zuo
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, Hunan,China
| | - Hui Chen
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, Hunan,China
| | - Yang Xiang
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, Hunan,China
| | - Chi Liu
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, Hunan,China
| | - Huijun Liu
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, Hunan,China
| | - Lang Pan
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, Hunan,China
| | - Xiangping Qu
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, Hunan,China
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Wang H, Zhang W, Liu R, Zheng J, Yao X, Chen H, Wang J, Weber HC, Qin X, Xiang Y, Liu C, Liu H, Pan L, Qu X. Lack of bombesin receptor-activated protein attenuates bleomycin-induced pulmonary fibrosis in mice. Life Sci Alliance 2022; 5:5/11/e202201368. [PMID: 35820707 PMCID: PMC9275683 DOI: 10.26508/lsa.202201368] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 06/27/2022] [Accepted: 06/28/2022] [Indexed: 11/24/2022] Open
Abstract
Enhanced autophagic activity in fibroblasts due to lack of BRAP homologous protein might contribute to the resistance to pulmonary fibrosis in mice. Bombesin receptor–activated protein (BRAP) was found to express in the interstitial cells of human fibrotic lungs with unknown function. Its homologous protein, encoded by BC004004 gene, was also present in mouse lung tissues. We used BC004004−/− mice which lack BRAP homologous protein expression to establish a bleomycin-induced lung fibrotic model. After bleomycin treatment, BC004004−/− mice exhibited attenuation of pulmonary injury and less pulmonary fibrosis. Fibroblasts from BC004004−/− mice proliferated at a lower rate and produced less collagen. Autophagy-related gene 5 (ATG5) was identified as a partner interacting with human BRAP. Lacking BRAP homologous protein led to enhanced autophagy activity in mouse lung tissues as well as in isolated lung fibroblasts, indicating a negative regulatory role of this protein in autophagy via interaction with ATG5. Enhanced autophagy process in fibroblasts due to lack of BRAP homologous protein might contribute to the resistance of BC004004−/− mice to pulmonary fibrosis.
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Affiliation(s)
- Hui Wang
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Wenrui Zhang
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Rujiao Liu
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Jiaoyun Zheng
- Department of Pathlogy, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Xueping Yao
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Hui Chen
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Jie Wang
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Horst Christian Weber
- Department of Pathology and Laboratory Medicine, Boston University School of Medicine, Section of Gastroenterology, Boston, MA, USA
| | - Xiaoqun Qin
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Yang Xiang
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Chi Liu
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Huijun Liu
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Lang Pan
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Xiangping Qu
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, China
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Chen Z, Shang Y, Yuan Y, He Y, Wasti B, Duan W, Ouyang R, Jia J, Xiao B, Zhang D, Zhang X, Li J, Chen B, Liu Y, Zeng Q, Ji X, Ma L, Liu S, Xiang X. MBD2 mediates Th17 cell differentiation by regulating MINK1 in Th17-dominant asthma. Front Genet 2022; 13:959059. [PMID: 36303542 PMCID: PMC9592806 DOI: 10.3389/fgene.2022.959059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 09/21/2022] [Indexed: 11/13/2022] Open
Abstract
Objectives: .Asthma is a highly heterogeneous disease, and T-helper cell type 17 (Th17) cells play a pathogenic role in the development of non-T2 severe asthma. Misshapen like kinase 1 (MINK1) is involved in the regulation of Th17 cell differentiation, but its effect on severe asthma remains unclear. Our previous studies showed that methyl-CpG binding domain protein 2 (MBD2) expression was significantly increased in patients with Th17 severe asthma and could regulate Th17 cell differentiation. The aim of this study was to investigate how MBD2 interacts with MINK1 to regulate Th17 cell differentiation in Th17-dominant asthma.Materials and methods: Female C57BL/6 mice and bronchial epithelial cells (BECs) were used to establish mouse and cell models of Th17-dominant asthma, respectively. Flow cytometry was used to detect Th17 cell differentiation, and the level of IL-17 was detected by enzyme-linked immunosorbent assay (ELISA). Western blot and quantitative real-time PCR (qRT-PCR) were used to detect MBD2 and MINK1 expression. To investigate the role of MBD2 and MINK1 in Th17 cell differentiation in Th17-dominant asthma, the MBD2 and MINK1 genes were silenced or overexpressed by small interfering RNA and plasmid transfection.Results: Mouse and BEC models of Th17-dominant asthma were established successfully. The main manifestations were increased neutrophils in BALF, airway hyperresponsiveness (AHR), activated Th17 cell differentiation, and high IL-17 levels. The expression of MBD2 in lung tissues and BECs from the Th17-dominant asthma group was significantly increased, while the corresponding expression of MINK1 was significantly impaired. Through overexpression or silencing of MBD2 and MINK1 genes, we have concluded that MBD2 and MINK1 regulate Th17 cell differentiation and IL-17 release. Interestingly, MBD2 was also found to negatively regulate the expression of MINK1.Conclusion: Our findings have revealed new roles for MBD2 and MINK1, and provide new insights into epigenetic regulation of Th17-dominant asthma, which is dominated by neutrophils and Th17 cells. This study could lead to new therapeutic targets for patients with Th17-dominant asthma.
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Affiliation(s)
- Zhifeng Chen
- Department of Respiratory Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yulin Shang
- Ophthalmology and Otorhinolaryngology, Zigui County Traditional Chinese Medicine Hospital, Zigui, Hubei, China
| | - Yu Yuan
- Department of Respiratory Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yi He
- Department of Respiratory Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Binaya Wasti
- Department of Respiratory Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Wentao Duan
- Department of Respiratory Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Ruoyun Ouyang
- Department of Respiratory Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jingsi Jia
- Department of Emergency, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Bing Xiao
- Department of Emergency, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Dongshan Zhang
- Department of Emergency, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xiufeng Zhang
- Department of Respiratory Medicine, The Second Affiliated Hospital of Hainan Medical University, Haikou, Hainan, China
| | - Jianmin Li
- Department of Respiratory and Critical Care Medicine, Hunan Provincial People’s Hospital, Changsha, Hunan, China
| | - Bolin Chen
- Department of Respiratory and Critical Care Medicine, Hunan Provincial People’s Hospital, Changsha, Hunan, China
| | - Yi Liu
- Department of Respiratory Medicine, Zhuzhou City Central Hospital, Zhuzhou, Hunan, China
| | - Qingping Zeng
- Department of Respiratory and Critical Care Medicine, Longshan County People’s Hospital, Longshan, Hunan, China
| | - Xiaoying Ji
- Department of Respiratory and Critical Care Medicine, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, China
| | - Libing Ma
- Department of Respiratory and Critical Care Medicine, The Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China
- *Correspondence: Libing Ma, ; Shaokun Liu, ; Xudong Xiang,
| | - Shaokun Liu
- Department of Respiratory Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
- *Correspondence: Libing Ma, ; Shaokun Liu, ; Xudong Xiang,
| | - Xudong Xiang
- Department of Emergency, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
- *Correspondence: Libing Ma, ; Shaokun Liu, ; Xudong Xiang,
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Bombesin Receptor Subtype-3 in Human Diseases. Arch Med Res 2020; 50:463-467. [PMID: 31911345 DOI: 10.1016/j.arcmed.2019.11.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 11/11/2019] [Accepted: 11/14/2019] [Indexed: 01/26/2023]
Abstract
This review summarizes the recent findings of the roles of bombesin receptor subtype-3 (BRS-3) in various patho-physiological conditions. Studies have demonstrated that two mammalians bombesin-like peptides, GRP and NMB, exhibit a large range of functions by binding to three receptors. Knockout studies showed that the mice BRS-3 has important effects on tumor growth, energy homeostasis, glucose regulation, satiety, and lung development (1,7). BRS-3 is an orphan receptor whose natural ligand is unknown. However, several agonists and antagonists have been synthesized which facilitate its characterization, (D-Tyr6, β-Ala11, Phe13, Nle14) Bn-(6-14) and MK-5046 are agonists, whereas ML-18 and Bantag-1 are antagonists. With the development of several selective, high-affinity BRS-3 agonists and antagonists, recent studies provided some insights into the biological effects of BRS-3 in several disease states including lung cancer, obesity, diabetes mellitus, asthma, and kidney diseases.
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Profiles of long noncoding RNAs in hypertensive rats: long noncoding RNA XR007793 regulates cyclic strain-induced proliferation and migration of vascular smooth muscle cells. J Hypertens 2017; 35:1195-1203. [PMID: 28319593 DOI: 10.1097/hjh.0000000000001304] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
BACKGROUND Long noncoding RNAs (lncRNAs) are being discovered in multiple diseases at a rapid pace. However, the contribution of lncRNAs to hypertension remains largely unknown. In hypertension, the vascular walls are exposed to abnormal mechanical cyclic strain, which leads to vascular remodelling. Here, we investigated the mechanobiological role of lncRNAs in hypertension. METHODS AND RESULTS Differences in the lncRNAs and mRNAs between spontaneously hypertensive rats and Wistar-Kyoto rats were screened using a gene microarray. The results showed that 68 lncRNAs and 255 mRNAs were upregulated in the aorta of spontaneously hypertensive rats, whereas 167 lncRNAs and 272 mRNAs were downregulated. Expressions of the screened lncRNAs, including XR007793, were validated by real-time PCR. A coexpression network was composed, and gene function was analysed using Ingenuity Pathway Analysis. In vitro, vascular smooth muscle cells (VSMCs) were subjected to cyclic strain at a magnitude of 5 (physiological normotensive cyclic strain) or 15% (pathological hypertensive cyclic strain) by Flexcell-4000T. A total of 15% cyclic strain increased XR007793 expression. XR007793 knockdown attenuated VSMC proliferation and migration and inhibited coexpressed genes such as signal transducers and activators of transcription 2 (stat2), LIM domain only 2 (lmo2) and interferon regulatory factor 7 (irf7). CONCLUSION The profile of lncRNAs was varied in response to hypertension, and pathological elevated cyclic strain may play crucial roles during this process. Our data revealed a novel mechanoresponsive lncRNA-XR007793, which modulates VSMC proliferation and migration, and participates in vascular remodelling during hypertension.
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9
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Xu Q, Chen LX, Ran DH, Xie WY, Li Q, Zhou XD. Bombesin receptor-activated protein regulates neutrophil elastase-induced mucin5AC hypersecretion in human bronchial epithelial cells. Exp Cell Res 2017; 357:145-154. [PMID: 28476309 DOI: 10.1016/j.yexcr.2017.05.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 04/26/2017] [Accepted: 05/02/2017] [Indexed: 01/13/2023]
Abstract
Bombesin receptor-activated protein (BRAP) is highly expressed in human bronchial epithelial cells. Recent studies have shown that BRAP reduces oxidative stress, inhibits airway inflammation and suppresses nuclear factor kappaB (NF-κB) activity. Mucus overproduction is an important feature in patients with chronic inflammatory airway diseases. Neutrophil elastase (NE) is a potent inducer of mucin5AC (MUC5AC), which is considered the predominant mucin secreted by human airway epithelial cells. Here, we hypothesize that BRAP may regulate NE-induced MUC5AC hypersecretion in a bronchial epithelial cell line (HBE16). We also investigated the underlying mechanism involved in the process. In this study, we found that BRAP was present in HBE16 human bronchial epithelial cells and was significantly increased by NE. Next, we found that the up-regulation of BRAP by pEGFP-N1-BRAP caused a significant decrease in the increased levels of MUC5AC expression, NF-κB activity, and the phosphorylation of extracellular signal-regulated kinases (ERK) and epidermal growth factor receptor (EGFR) induced by NE. Meanwhile, there was a significant decrease in ROS, interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α) levels when BRAP was up-regulated by pEGFP-N1-BRAP. Moreover, when cells were transfected with pEGFP-N1-BRAP and pretreated with NF-κB, ERK or EGFR inhibitors before the NE stimulation, there were further decreased in MUC5AC expression, NF-κB activity, and the phosphorylation of ERK and EGFR. These results suggest that BRAP plays an important role in airway inflammation and its overexpression may regulate NE-induced MUC5AC hypersecretion in HBE16 cells via the EGFR/ERK/NF-κB signaling pathway.
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Affiliation(s)
- Qing Xu
- Division of Respiratory Medicine, Second Affiliated Hospital, Chongqing Medical University, No. 74, Linjiang Road, Yuzhong District, Chongqing 400010, China.
| | - Ling-Xiu Chen
- Division of Respiratory Medicine, Second Affiliated Hospital, Chongqing Medical University, No. 74, Linjiang Road, Yuzhong District, Chongqing 400010, China
| | - Dan-Hua Ran
- Department of Respiratory and Geriatrics Medicine, Chongqing Public Health Medical Center, No. 2, Huangjiaowan Road, Xiaolongkan Street, Shapingba District, Chongqing 400010, China
| | - Wen-Yue Xie
- Division of Respiratory Medicine, Second Affiliated Hospital, Chongqing Medical University, No. 74, Linjiang Road, Yuzhong District, Chongqing 400010, China
| | - Qi Li
- Department of Respiratory Medicine, First Affiliated Hospital, Hainan Medical University, No. 31, Longhua Road, Haikou 570102, Hainan, China
| | - Xiang-Dong Zhou
- Division of Respiratory Medicine, Second Affiliated Hospital, Chongqing Medical University, No. 74, Linjiang Road, Yuzhong District, Chongqing 400010, China; Department of Respiratory Medicine, First Affiliated Hospital, Hainan Medical University, No. 31, Longhua Road, Haikou 570102, Hainan, China.
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10
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Liu Y, Qin XQ, Weber HC, Xiang Y, Liu C, Liu HJ, Yang H, Jiang J, Qu X. Bombesin Receptor-Activated Protein (BRAP) Modulates NF-κB Activation in Bronchial Epithelial Cells by Enhancing HDAC Activity. J Cell Biochem 2015; 117:1069-77. [PMID: 26460487 DOI: 10.1002/jcb.25406] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 10/09/2015] [Indexed: 01/01/2023]
Abstract
Our previous studies provided evidence that bombesin receptor-activated protein (BRAP), encoded by C6ORF89, is widely expressed in human airway epithelial cells and may play a role in the stress response of lung epithelia. In this study, we demonstrated that BRAP has a regulatory effect on NF-κB transcriptional activity in cultured human bronchial epithelial cells (HBECs). BRAP overexpression by gene transfer inhibited both basal and inducible NF-κB transcriptional activity in HBECs, whereas BRAP knockdown had the opposite effect. BRAP was shown to regulate NF-κB activity by enhancing histone deacetylase (HDAC) activity. In addition, BRAP might increase HDAC activity that leads to NF-κB activation via its putative C-terminal domain. Our study suggests that the BRAP protein is an important regulator of immune and inflammatory responses in the human airway epithelium.
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Affiliation(s)
- Ying Liu
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, 410008, Hunan, China
| | - Xiao-Qun Qin
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, 410008, Hunan, China
| | - Horst Christian Weber
- Department of Pathology and Laboratory Medicine, Boston University School of Medicine, Section of Gastroenterology, Boston, 02118, Massachusetts
| | - Yang Xiang
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, 410008, Hunan, China
| | - Chi Liu
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, 410008, Hunan, China
| | - Hui-Jun Liu
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, 410008, Hunan, China
| | - Huan Yang
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, 410008, Hunan, China
| | - Jianxin Jiang
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, 400042, China
| | - Xiangping Qu
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, 410008, Hunan, China
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