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Yi Z, Ma T, Liu J, Tie W, Li Y, Bai J, Li L, Zhang L. LGR4 promotes tumorigenesis by activating TGF-β1/Smad signaling pathway in multiple myeloma. Cell Signal 2023; 110:110814. [PMID: 37473901 DOI: 10.1016/j.cellsig.2023.110814] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 07/09/2023] [Accepted: 07/17/2023] [Indexed: 07/22/2023]
Abstract
Multiple myeloma (MM) is a common hematologic malignancy that remains incurable. Although accumulating evidence suggests that the leucine-rich repeat-containing G-protein-coupled receptor 4 (LGR4) plays a biological function in a variety of cancers, its biological function and molecular mechanisms in MM are unclear. In the present study, we found that LGR4 was significantly upregulated in MM tissues and cells. In vitro and in vivo experiments showed that knockdown of LGR4 significantly inhibited proliferation of MM cells, promoted apoptosis and arrested cell cycle in G1. Overexpression showed the opposite effect. Mechanistic studies revealed that LGR4 could interact with TGF-β1 and regulate TGF-β1 expression, thereby activating the TGF-β1/Smad signaling pathway and promoting MM progression. LGR4 may be a potential new target for MM diagnosis and treatment.
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Affiliation(s)
- Zhigang Yi
- Department of Hematology, Lanzhou University Second Hospital, Lanzhou, China; Department of Pediatric Orthopedics and Pediatrics, Lanzhou University Second Hospital, Lanzhou, China
| | - Tao Ma
- Department of Hematology, Lanzhou University Second Hospital, Lanzhou, China; Department of Hematology, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Jia Liu
- Department of Hematology, Lanzhou University Second Hospital, Lanzhou, China
| | - Wenting Tie
- Department of Hematology, Lanzhou University Second Hospital, Lanzhou, China
| | - Yanhong Li
- Department of Hematology, Lanzhou University Second Hospital, Lanzhou, China
| | - Jun Bai
- Department of Hematology, Lanzhou University Second Hospital, Lanzhou, China
| | - Lijuan Li
- Department of Hematology, Lanzhou University Second Hospital, Lanzhou, China.
| | - Liansheng Zhang
- Department of Hematology, Lanzhou University Second Hospital, Lanzhou, China.
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Luteolin inhibits the TGF-β signaling pathway to overcome bortezomib resistance in multiple myeloma. Cancer Lett 2023; 554:216019. [PMID: 36442773 DOI: 10.1016/j.canlet.2022.216019] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 11/21/2022] [Accepted: 11/21/2022] [Indexed: 11/27/2022]
Abstract
Multiple myeloma (MM) is an incurable condition and the second most common hematological malignancy. Over the past few years, there has been progress in the treatment of MM, but most patients still relapse. Multiple myeloma stem-like cells (MMSCs) are believed to be the main reason for drug resistance and eventual relapse. Currently, there are not enough therapeutic agents that have been identified for eradication of MMSCs, and thus, identification of the same may alleviate the issue of relapse in patients. In the present study, we showed that luteolin (LUT), a natural compound obtained from different plants, such as vegetables, medicinal herbs, and fruits, effectively inhibits the proliferation of MM cells and overcomes bortezomib (BTZ) resistance in them in vitro and in vivo, mainly by decreasing the proportion of ALDH1+ cells. Furthermore, RNA sequencing after LUT treatment of MM cell lines and an MM xenograft mouse model revealed that the effects of the compound are mediated through inhibition of transforming growth factor-β signaling. Similarly, we found that LUT also significantly reduced the proportion of ALDH1+ cells in primary CD138+ plasma cells. In addition, LUT could overcome the BTZ treatment-induced increase in the proportion of ALDH1+ cells, and the combination of LUT and BTZ had a synergistic effect against myeloma cells. Collectively, our findings suggested that LUT is a promising agent that manifests MMSCs to overcome BTZ resistance, alone or in combination with BTZ, and thus, is a potential therapeutic drug for the treatment of MM.
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Liu Z, Gao H, Peng Q, Yang Y. Long Noncoding RNA LUCAT1 Promotes Multiple Myeloma Cell Growth by Regulating the TGF-β Signaling Pathway. Technol Cancer Res Treat 2020; 19:1533033820945770. [PMID: 32812490 PMCID: PMC7440725 DOI: 10.1177/1533033820945770] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Objective: Long noncoding RNAs (lncRNAs) are potential biomarkers for cancers. Nevertheless, the ability of long noncoding RNA lung cancer-associated transcript 1 in patients with multiple myeloma remains unknown. The purpose of this current study was to figure out its function in multiple myeloma. Methods: Firstly, the expression of long noncoding RNA lung cancer-associated transcript 1 in cancer or normal tissues and serum from patients with multiple myeloma and normal donors was detected. Secondly, the expression of long noncoding RNA lung cancer-associated transcript 1 was overexpressed or silenced in U266 and H929 cells, respectively to detect changes of proliferation and apoptosis in multiple myeloma in vitro. Subsequently, the expression of transforming growth factor-β signaling pathway-related proteins was detected by western blot analysis. Finally, the effect of long noncoding RNA lung cancer-associated transcript 1 on the growth of multiple myeloma cells in vivo was evaluated by tumor xenograft in nude mice. Results: Long noncoding RNA lung cancer-associated transcript 1 was increased in cancer tissues and serum of patients with multiple myeloma as well as multiple myeloma cells, which was correlated with dismal prognosis of patients with multiple myeloma. Overexpression of long noncoding RNA lung cancer-associated transcript 1 promoted the activity of U266 and H929 cells, while inhibition of long noncoding RNA lung cancer-associated transcript 1 suppressed the activity of U266 and H929 cells. In addition, long noncoding RNA lung cancer-associated transcript 1 was found to promote activation of the transforming growth factor-β signaling pathway. Furthermore, long noncoding RNA lung cancer-associated transcript 1 knockdown restricted the growth of multiple myeloma cells in vivo. Conclusion: This study suggests that suppression of long noncoding RNA lung cancer-associated transcript 1 inhibits the activation of transforming growth factor-β signaling pathway, thereby inhibiting the growth of multiple myeloma cells.
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Affiliation(s)
- Zhaoyu Liu
- 74648Department of Medical Oncology, the Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China
| | - Hong Gao
- 74648Department of Gastroenterology, the Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China
| | - Qing Peng
- 74648Department of Medical Oncology, the Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China
| | - Yongheng Yang
- 74648Department of Medical Oncology, the Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China
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Chen F, Shao F, Hinds A, Yao S, Ram-Mohan S, Norman TA, Krishnan R, Fine A. Retinoic acid signaling is essential for airway smooth muscle homeostasis. JCI Insight 2018; 3:120398. [PMID: 30135301 DOI: 10.1172/jci.insight.120398] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 07/11/2018] [Indexed: 12/18/2022] Open
Abstract
Airway smooth muscle (ASM) is a dynamic and complex tissue involved in regulation of bronchomotor tone, but the molecular events essential for the maintenance of ASM homeostasis are not well understood. Observational and genome-wide association studies in humans have linked airway function to the nutritional status of vitamin A and its bioactive metabolite retinoic acid (RA). Here, we provide evidence that ongoing RA signaling is critical for the regulation of adult ASM phenotype. By using dietary, pharmacologic, and genetic models in mice and humans, we show that (a) RA signaling is active in adult ASM in the normal lung, (b) RA-deficient ASM cells are hypertrophic, hypercontractile, profibrotic, but not hyperproliferative, (c) TGF-β signaling, known to cause ASM hypertrophy and airway fibrosis in human obstructive lung diseases, is hyperactivated in RA-deficient ASM, (d) pharmacologic and genetic inhibition of the TGF-β activity in ASM prevents the development of the aberrant phenotype induced by RA deficiency, and (e) the consequences of transient RA deficiency in ASM are long-lasting. These results indicate that RA signaling actively maintains adult ASM homeostasis, and disruption of RA signaling leads to aberrant ASM phenotypes similar to those seen in human chronic airway diseases such as asthma.
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Affiliation(s)
- Felicia Chen
- The Pulmonary Center, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Fengzhi Shao
- The Pulmonary Center, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Anne Hinds
- The Pulmonary Center, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Sean Yao
- Center for Vascular Biology Research, Department of Emergency Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
| | - Sumati Ram-Mohan
- Center for Vascular Biology Research, Department of Emergency Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
| | - Timothy A Norman
- The Pulmonary Center, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Ramaswamy Krishnan
- Center for Vascular Biology Research, Department of Emergency Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
| | - Alan Fine
- The Pulmonary Center, Boston University School of Medicine, Boston, Massachusetts, USA.,Division of Pulmonary, Critical Care, and Allergy, West Roxbury Veterans Hospital, West Roxbury, Massachusetts, USA
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Liao K, Yong CW, Hua K. SB431542 inhibited cigarette smoke extract induced invasiveness of A549 cells via the TGF-β1/Smad2/MMP3 pathway. Oncol Lett 2018; 15:9681-9686. [PMID: 29963124 PMCID: PMC6020173 DOI: 10.3892/ol.2018.8556] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2017] [Accepted: 02/19/2018] [Indexed: 02/06/2023] Open
Abstract
Lung cancer has high morbidity and mortality rates. Smoking is involved in the pathogenesis of lung cancer, and tobacco smoke may increase tumor cell invasion and metastasis. The effects of cigarette smoke extract (CSE) on the carcinoma human alveolar basal epithelial A549 cell line were investigated. A549 cells were exposed to increasing concentrations of CSE for 12, 24 and 48 h, and the transforming growth factor-β1 (TGF-β1) signal pathway was inhibited by addition of SB431542, a TGF-β1 receptor antagonist. The proliferation of A549 cells was assayed by a Cell Counting kit-8, invasiveness was assayed using Transwell chambers, and TGF-β1, phosphorylated mothers against decapentaplegic homolog 2 (p-Smad2), and matrix metalloproteinase 3 (MMP3) levels was assessed by western blot analysis. The invasiveness of A549 cells and the expression of TGF-β1, pSmad2, and MMP-3 were significantly increased by CSE (P<0.05). The effects of CSE were abrogated by SB431542 (P<0.05). In conclusion, CSE increased the invasiveness of A549 cells and its effects were abrogated by SB431542 and the TGF-β1/Smad2/MMP-3 pathway may have been involved.
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Affiliation(s)
- Ke Liao
- Department of Respiration and Gastroenterology, The Seventh Peoples Hospital of Chengdu, Chengdu, Sichuan 610000, P.R. China
| | - Chen-Wei Yong
- Department of Respiration and Gastroenterology, The Seventh Peoples Hospital of Chengdu, Chengdu, Sichuan 610000, P.R. China
| | - Ke Hua
- Department of Respiration and Gastroenterology, The Seventh Peoples Hospital of Chengdu, Chengdu, Sichuan 610000, P.R. China
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