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Lin L, Deng J, Peng J, Cui J, Wang L, Zhang M, Gao J, Li F, Shi Y, Lv M. Structural insights into the recognition of the A/T-rich motif in target gene promoters by the LMX1a homeobox domain. FEBS J 2024; 291:2792-2810. [PMID: 38465368 DOI: 10.1111/febs.17118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 01/16/2024] [Accepted: 03/01/2024] [Indexed: 03/12/2024]
Abstract
LIM homeodomain transcription factor 1-alpha (LMX1a) is a neuronal lineage-specific transcription activator that plays an essential role during the development of midbrain dopaminergic (mDA) neurons. LMX1a induces the expression of multiple key genes, which ultimately determine the morphology, physiology, and functional identity of mDA neurons. This function of LMX1a is dependent on its homeobox domain. Here, we determined the structures of the LMX1a homeobox domain in complex with the promoter sequences of the Wnt family member 1 (WNT1) or paired like homeodomain 3 (Pitx3) gene, respectively. The complex structures revealed that the LMX1a homeobox domain employed its α3 helix and an N-terminal loop to achieve specific target recognition. The N-terminal loop (loop1) interacted with the minor groove of the double-stranded DNA (dsDNA), whereas the third α-helix (α3) was tightly packed into the major groove of the dsDNA. Structure-based mutations in the α3 helix of the homeobox domain significantly reduced the binding affinity of LMX1a to dsDNA. Moreover, we identified a nonsyndromic hearing loss (NSHL)-related mutation, R199, which yielded a more flexible loop and disturbed the recognition in the minor groove of dsDNA, consistent with the molecular dynamics (MD) simulations. Furthermore, overexpression of Lmx1a promoted the differentiation of SH-SY5Y cells and upregulated the transcription of WNT1 and PITX3 genes. Hence, our work provides a detailed elucidation of the specific recognition between the LMX1a homeobox domain and its specific dsDNA targets, which represents valuable information for future investigations of the functional pathways that are controlled by LMX1a during mDA neuron development.
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Affiliation(s)
- Liqing Lin
- Division of Life Sciences and Medicine, Hefei National Research Center for Cross Disciplinary Science, School of Life Sciences, University of Science and Technology of China, Hefei, China
- Ministry of Education Key Laboratory for Membraneless Organelles and Cellular Dynamics, University of Science & Technology of China, Hefei, China
| | - Jie Deng
- Division of Life Sciences and Medicine, Hefei National Research Center for Cross Disciplinary Science, School of Life Sciences, University of Science and Technology of China, Hefei, China
- Ministry of Education Key Laboratory for Membraneless Organelles and Cellular Dynamics, University of Science & Technology of China, Hefei, China
| | - Junhui Peng
- Laboratory of Evolutionary Genetics and Genomics, The Rockefeller University, New York, NY, USA
| | - Jing Cui
- Division of Life Sciences and Medicine, Hefei National Research Center for Cross Disciplinary Science, School of Life Sciences, University of Science and Technology of China, Hefei, China
- Ministry of Education Key Laboratory for Membraneless Organelles and Cellular Dynamics, University of Science & Technology of China, Hefei, China
| | - Lei Wang
- Division of Life Sciences and Medicine, Hefei National Research Center for Cross Disciplinary Science, School of Life Sciences, University of Science and Technology of China, Hefei, China
- Ministry of Education Key Laboratory for Membraneless Organelles and Cellular Dynamics, University of Science & Technology of China, Hefei, China
| | - Min Zhang
- Division of Life Sciences and Medicine, Hefei National Research Center for Cross Disciplinary Science, School of Life Sciences, University of Science and Technology of China, Hefei, China
- Ministry of Education Key Laboratory for Membraneless Organelles and Cellular Dynamics, University of Science & Technology of China, Hefei, China
| | - Jia Gao
- Division of Life Sciences and Medicine, Hefei National Research Center for Cross Disciplinary Science, School of Life Sciences, University of Science and Technology of China, Hefei, China
- Ministry of Education Key Laboratory for Membraneless Organelles and Cellular Dynamics, University of Science & Technology of China, Hefei, China
| | - Fudong Li
- Division of Life Sciences and Medicine, Hefei National Research Center for Cross Disciplinary Science, School of Life Sciences, University of Science and Technology of China, Hefei, China
- Ministry of Education Key Laboratory for Membraneless Organelles and Cellular Dynamics, University of Science & Technology of China, Hefei, China
| | - Yunyu Shi
- Division of Life Sciences and Medicine, Hefei National Research Center for Cross Disciplinary Science, School of Life Sciences, University of Science and Technology of China, Hefei, China
- Ministry of Education Key Laboratory for Membraneless Organelles and Cellular Dynamics, University of Science & Technology of China, Hefei, China
| | - Mengqi Lv
- Division of Life Sciences and Medicine, Hefei National Research Center for Cross Disciplinary Science, School of Life Sciences, University of Science and Technology of China, Hefei, China
- Ministry of Education Key Laboratory for Membraneless Organelles and Cellular Dynamics, University of Science & Technology of China, Hefei, China
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2
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Yu Z, Che N, He Y, Zhang B. ceRNA network of lncRNA MIR210HG/miR-377-3p/LMX1A in malignant proliferation of glioma cells. Genes Genomics 2022; 44:1445-1455. [PMID: 36197580 DOI: 10.1007/s13258-022-01312-2] [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: 04/28/2022] [Accepted: 08/18/2022] [Indexed: 11/25/2022]
Abstract
BACKGROUND Glioma represents the most heterogeneous and malignant form of brain tumor with a poor prognosis. The long non-coding RNA (LncRNA)-mediated competing endogenous RNA (ceRNA) network plays a regulatory role in cancer progression. OBJECTIVES The present study was conducted to expound on the role of lncRNA MIR210 host gene (MIR210HG)-mediated ceRNA mechanism in the malignant proliferation of glioma cells and provide a novel theoretical basis for the treatment of glioma. METHODS Expression levels of lncRNA MIR210HG, microRNA (miR)-377-3p, and LIM homeobox transcription factor 1 alpha (LMX1A) in glioma tissues and cells were determined by reverse-transcription quantitative polymerase chain reaction. Then, cell proliferation was assessed by cell counting kit-8 and colony formation assays. After that, the subcellular localization of lncRNA MIR210HG was analyzed by subcellular fractionation assay and the bindings of miR-377-3p to lncRNA MIR210HG and LMX1A were analyzed by the dual-luciferase assay. Glioma cells were transfected with si-MIR210HG, miR-377-3p inhibitor, or overexpressed-LMX1A vectors to evaluate their effects on the malignant proliferation of glioma cells. RESULTS LncRNA MIR210HG was elevated in glioma tissues and cells and inhibition of lncRNA MIR210HG reduced the proliferation potential of glioma cells. LncRNA MIR210HG targeted and inhibited miR-377-3p and miR-377-3p targeted and inhibited LMX1A transcription. miR-377-3p downregulation or LMX1A overexpression reversed the inhibition of silencing lncRNA MIR210HG on glioma cell proliferation. CONCLUSION LncRNA MIR210HG was upregulated in glioma tissues and cells and inhibition of lncRNA MIR210HG suppressed glioma cell proliferation through promoting miR-377-3p and repressing LMX1A.
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Affiliation(s)
- Zhikuan Yu
- Department of Neurosurgery, The Second Hospital of Dalian Medical University, 467 Zhongshan Road, 116000, Dalian, Liaoning Province, China
| | - Ningwei Che
- Department of Neurosurgery, The Second Hospital of Dalian Medical University, 467 Zhongshan Road, 116000, Dalian, Liaoning Province, China
| | - Yeting He
- Department of Neurosurgery, The Second Hospital of Dalian Medical University, 467 Zhongshan Road, 116000, Dalian, Liaoning Province, China
| | - Bo Zhang
- Department of Neurosurgery, The Second Hospital of Dalian Medical University, 467 Zhongshan Road, 116000, Dalian, Liaoning Province, China.
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3
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von Spreckelsen N, Kesseler C, Brokinkel B, Goldbrunner R, Perry A, Mawrin C. Molecular neuropathology of brain-invasive meningiomas. Brain Pathol 2022; 32:e13048. [PMID: 35213084 PMCID: PMC8877755 DOI: 10.1111/bpa.13048] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 12/17/2021] [Accepted: 12/20/2021] [Indexed: 12/24/2022] Open
Abstract
Invasion of brain tissue by meningiomas has been identified as one key factor for meningioma recurrence. The identification of meningioma tumor tissue surrounded by brain tissue in neurosurgical samples has been touted as a criterion for atypical meningioma (CNS WHO grade 2), but is only rarely seen in the absence of other high-grade features, with brain-invasive otherwise benign (BIOB) meningiomas remaining controversial. While post-surgery irradiation therapy might be initiated in brain-invasive meningiomas to prevent recurrences, specific treatment approaches targeting key molecules involved in the invasive process are not established. Here we have compiled the current knowledge about mechanisms supporting brain tissue invasion by meningiomas and summarize preclinical models studying targeted therapies with potential inhibitory effects.
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Affiliation(s)
- Niklas von Spreckelsen
- Department of Neuropathology, University Hospital Magdeburg, Magdeburg, Germany.,Department of General Neurosurgery, Center for Neurosurgery, Cologne University Hospital, Faculty of Medicine and University Hospital, University of Cologne, Germany
| | - Christoph Kesseler
- Department of Neuropathology, University Hospital Magdeburg, Magdeburg, Germany
| | - Benjamin Brokinkel
- Department of Neurosurgery, University Hospital Münster, Münster, Germany
| | - Roland Goldbrunner
- Department of General Neurosurgery, Center for Neurosurgery, Cologne University Hospital, Faculty of Medicine and University Hospital, University of Cologne, Germany
| | - Arie Perry
- Department of Pathology, UCSF, San Francisco, California, USA.,Department of Neurological Surgery, UCSF, San Francisco, California, USA
| | - Christian Mawrin
- Department of Neuropathology, University Hospital Magdeburg, Magdeburg, Germany
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4
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Epigenetic Silencing of LMX1A Contributes to Cancer Progression in Lung Cancer Cells. Int J Mol Sci 2020; 21:ijms21155425. [PMID: 32751497 PMCID: PMC7432919 DOI: 10.3390/ijms21155425] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/16/2020] [Accepted: 07/27/2020] [Indexed: 12/15/2022] Open
Abstract
Epigenetic modification is considered a major mechanism of the inactivation of tumor suppressor genes that finally contributes to carcinogenesis. LIM homeobox transcription factor 1α (LMX1A) is one of the LIM-homeobox-containing genes that is a critical regulator of growth and differentiation. Recently, LMX1A was shown to be hypermethylated and functioned as a tumor suppressor in cervical cancer, ovarian cancer, and gastric cancer. However, its role in lung cancer has not yet been clarified. In this study, we used public databases, methylation-specific PCR (MSP), reverse transcription PCR (RT-PCR), and bisulfite genomic sequencing to show that LMX1A was downregulated or silenced due to promoter hypermethylation in lung cancers. Treatment of lung cancer cells with the demethylating agent 5-aza-2'-deoxycytidine restored LMX1A expression. In the lung cancer cell lines H23 and H1299, overexpression of LMX1A did not affect cell proliferation but suppressed colony formation and invasion. These suppressive effects were reversed after inhibition of LMX1A expression in an inducible expression system in H23 cells. The quantitative RT-PCR (qRT-PCR) data showed that LMX1A could modulate epithelial mesenchymal transition (EMT) through E-cadherin (CDH1) and fibronectin (FN1). NanoString gene expression analysis revealed that all aberrantly expressed genes were associated with processes related to cancer progression, including angiogenesis, extracellular matrix (ECM) remodeling, EMT, cancer metastasis, and hypoxia-related gene expression. Taken together, these data demonstrated that LMX1A is inactivated through promoter hypermethylation and functions as a tumor suppressor. Furthermore, LMX1A inhibits non-small cell lung cancer (NSCLC) cell invasion partly through modulation of EMT, angiogenesis, and ECM remodeling.
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Chen J, Hou C, Zheng Z, Lin H, Lv G, Zhou D. Identification of Secreted Phosphoprotein 1 (SPP1) as a Prognostic Factor in Lower-Grade Gliomas. World Neurosurg 2019; 130:e775-e785. [PMID: 31295606 DOI: 10.1016/j.wneu.2019.06.219] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 06/27/2019] [Accepted: 06/28/2019] [Indexed: 02/05/2023]
Abstract
OBJECTIVE Secreted phosphoprotein 1 (SPP1) is an important extracellular glycoprotein that is associated with immune regulation, tumorigenesis, and cell signaling. However, the prognostic value of SPP1 in patients with glioma has not yet been clarified, especially in lower-grade gliomas. The objective of this study is to evaluate the prognostic merit of SPP1 in lower-grade gliomas. METHODS The messenger RNA (mRNA) expression of SPP1 in about 1000 cancer cell lines was explored by using the data from the Cancer Cell Line Encyclopedia database. The Oncomine database was mined to evaluate the mRNA expression of SPP1 in lower-grade glioma, glioblastoma, and normal brain tissues. The correlation between SPP1 mRNA expression and overall survival of patients with glioma from The Cancer Genome Atlas database was analyzed. RESULTS SPP1 mRNA expression of glioma was ranked as the eighth highest of all cancer cell lines in the Cancer Cell Line Encyclopedia database. The data from the Oncomine database suggested that SPP1 expression was significantly high in glioblastoma compared with normal brain tissues but was not significantly high in lower-grade glioma compared with normal brain tissue. Analysis of the RNA-Seq data from The Cancer Genome Atlas database showed that the increased SPP1 mRNA expression in lower-grade glioma was significantly associated with poor survival outcomes in patients with lower-grade glioma. Multivariate Cox regression analysis showed that SPP1 might be considered as an independent prognostic factor in lower-grade gliomas. CONCLUSIONS The present study showed that SPP1 overexpression is related to worse overall survival in patients with lower-grade glioma. Moreover, SPP1 could be considered as an independent factor in lower-grade gliomas.
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Affiliation(s)
- Jiawei Chen
- Shantou University Medical College, Shantou, Guangdong, China; Department of Neurosurgery, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Chongxian Hou
- Department of Neurosurgery, Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - Zongtai Zheng
- Shantou University Medical College, Shantou, Guangdong, China; Department of Neurosurgery, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Han Lin
- Shantou University Medical College, Shantou, Guangdong, China; Department of Neurosurgery, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Guangzhao Lv
- Shantou University Medical College, Shantou, Guangdong, China; Department of Neurosurgery, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Dong Zhou
- Department of Neurosurgery, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China.
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Zong Z, Song Y, Xue Y, Ruan X, Liu X, Yang C, Zheng J, Cao S, Li Z, Liu Y. Knockdown of LncRNA SCAMP1 suppressed malignant biological behaviours of glioma cells via modulating miR-499a-5p/LMX1A/NLRC5 pathway. J Cell Mol Med 2019; 23:5048-5062. [PMID: 31207033 PMCID: PMC6653555 DOI: 10.1111/jcmm.14362] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 03/24/2019] [Accepted: 04/15/2019] [Indexed: 12/13/2022] Open
Abstract
Dysregulation of long non‐coding RNAs (lncRNAs) confirm that it plays a crucial role in tumourigenesis and malignant progression of glioma. The present study demonstrated that LncRNA secretory carrier membrane protein 1 (SCAMP1) was up‐regulated and functioned as an oncogene in glioma cells. In addition, miR‐499a‐5p was down‐regulated meanwhile exerted tumour‐suppressive function in glioma cells. Subsequently, inhibition of SCAMP1 significantly restrained the cell proliferation, migration and invasion, as well as promoted apoptosis by acting as a molecular sponge of miR‐499a‐5p. Transcription factor LIM homeobox transcription factor 1, alpha (LMX1A) was overexpressed in glioma tissues and cells. Moreover, miR‐499a‐5p targeted LMX1A 3′‐UTR in a sequence‐specific manner. Hence, down‐regulation of SCAMP1 remarkably reduced the expression level of LMX1A, indicating that LMX1A participated in miR‐499a‐5p‐induced tumour‐suppressive effects on glioma cells. Furthermore, knockdown of LMX1A decreased NLR family, CARD domain containing 5 (NLRC5) mRNA and protein expression levels through directly binding to the NLRC5 promoter region. Down‐regulation of NLRC5 obviously inhibited malignant biological behaviours of glioma cells through attenuating the activity of Wnt/β‐catenin signalling pathway. In conclusion, our study clarifies that SCAMP1/miR‐499a‐5p/LMX1A/NLRC5 axis plays a critical role in modulating malignant progression of glioma cells, which provide a novel therapeutic strategy for glioma treatment.
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Affiliation(s)
- Zheqi Zong
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China
| | - Yichen Song
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China
| | - Yixue Xue
- Department of Neurobiology, School of Life Sciences, China Medical University, Shenyang, China.,Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang, China.,Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang, China
| | - Xuelei Ruan
- Department of Neurobiology, School of Life Sciences, China Medical University, Shenyang, China.,Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang, China.,Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang, China
| | - Xiaobai Liu
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China
| | - Chunqing Yang
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China
| | - Jian Zheng
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China
| | - Shuo Cao
- Department of Neurobiology, School of Life Sciences, China Medical University, Shenyang, China.,Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang, China.,Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang, China
| | - Zhen Li
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China
| | - Yunhui Liu
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China
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Abstract
The study was conducted to investigate the diagnostic performance of serum LIM homeobox transcription factor 1 alpha (LMX1A) in patients with gastric cancer (GC).The serum level of LMX1A in GC, benign, and healthy groups was measured using quantitative real time PCR (qRT-PCR) and compared with the student t test. The associations of serum LMX1A levels with clinical parameters were analyzed with chi-square test. The diagnostic value of serum LMX1A in GC was evaluated by receiver operating characteristic (ROC) curve.The level of serum LMX1A in GC group (1.309 ± 0.553) was significantly lower than that in the benign group (2.174 ± 0.676) and healthy group (2.598 ± 0.826) (P < .01 for both). The decreased level of LMX1A was associated with large tumor size (P = .009), positive lymph node metastasis (P = .027), and advanced TNM stages (P = .002). Receiver operating characteristic (ROC) analysis demonstrated that serum LMX1A could discriminate GC patients from the healthy individuals, with the area under the curve (AUC) of 0.889 (95% confidence interval [CI] = 0.838-0.938) combining with the sensitivity and specificity of 82.68% and 82.61%. Additionally, serum LMX1A also exhibited high accuracy in discriminating between GC patients and benign gastric disease cases (AUC = 0.842, 95% CI = 0.782-0.901), with the sensitivity of 81.89% and specificity of 72.41%.Serum LMX1A may be an effective biomarker for early detection of GC.
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Affiliation(s)
| | - Chen Li
- Molecular Testing Center, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou City, Liaoning Province, China
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Chen YH, Hueng DY, Tsai WC. Proteolipid Protein 2 Overexpression Indicates Aggressive Tumor Behavior and Adverse Prognosis in Human Gliomas. Int J Mol Sci 2018; 19:ijms19113353. [PMID: 30373180 PMCID: PMC6274732 DOI: 10.3390/ijms19113353] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 10/21/2018] [Accepted: 10/23/2018] [Indexed: 01/12/2023] Open
Abstract
Proteolipid protein 2 (PLP2), a membrane protein of the endoplasmic reticulum, is related to tumor proliferation and metastasis in some human cancers, but not in gliomas. First, we performed western-blot analysis, real-time quantitative PCR and immunohistochemical stains to detect PLP2 expression in 4 glioma cell lines and human glioma tissues. In addition, we used small interfering RNA (SiPLP2) and short hairpin RNA (shPLP2) to knockdown PLP2 expression in GBM8401 and LN229 glioma cell lines. After then, the alteration of PLP2 suppressed glioma cells behavior were examined by cell proliferation, wound healing, cell invasion, and colonies formation assays. Finally, the possible mechanism of PLP2 was analyzed by detecting the expression of the proteins related to cell-cycle checkpoints, cell-proliferative signaling factors, and cell-matrix interaction. Compared with normal brain cell lysates and mRNA, all glioma cell lines displayed PLP2 protein and mRNA overexpression. Besides, higher PLP2 IHC staining significantly correlated with more advanced tumor grades and poorer prognosis in human gliomas. Both siPLP2 transfected gliomas showed a clear inhibition of glioma cell proliferation, migration, and invasion as well as down-regulating p-p38, p-ERK, MMP-2, and MMP-9 expression. In conclusion, we successfully demonstrated that PLP2 overexpression played an oncogenic role in glioma development and aggressive tumor behavior.
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Affiliation(s)
- Yi-Hsuan Chen
- Graduate Institute of Pathology and Parasitology, National Defense Medical Center, Taipei 11490, Taiwan.
| | - Dueng-Yuan Hueng
- Department of Neurological Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei 11490, Taiwan.
| | - Wen-Chiuan Tsai
- Graduate Institute of Pathology and Parasitology, National Defense Medical Center, Taipei 11490, Taiwan.
- Department of Pathology, Tri-Service General Hospital, National Defense Medical Center, No. 325, Sec. 2, Cheng-Kung Road, Neihu 114, Taipei 11490, Taiwan.
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Soave I, Occhiali T, Wenger JM, Pluchino N, Caserta D, Marci R. Endometriosis and food habits: Can diet make the difference? JOURNAL OF ENDOMETRIOSIS AND PELVIC PAIN DISORDERS 2018. [DOI: 10.1177/2284026518773212] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Endometriosis is a chronic, inflammatory, estrogenic-dependent disease characterized by the presence of endometrial glands outside the uterine cavity, affecting approximately 2%–10% of women in reproductive age and 30%–50% of women in general. Despite the high prevalence of the disease, not much is known about etiology, possible risk factors, and an adequate and satisfactory therapy. In the past years, many studies have focused on food intake (nutrients and food groups) and on its possible correlation with endometriosis, demonstrating how diet could be identified as a possible risk factor. Comprehensive searches in the largest medical information databases (Medline-PubMed, Embase, Lilacs, and Cochrane Library) were conducted using the Medical Subject Heading terms “diet,” “food,” “nutrition,” “fatty acids,” vitamins,” “fruit,” “vegetables,” “coffee,” “caffeine,” “fish,” “soy food,” “dairy products,” “tea,” “curcumin” combined with “endometriosis.” Purpose of this review is to revise the literature, in order to determine potential modifiable risk factors of the disease.
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Affiliation(s)
- Ilaria Soave
- Department of Medical and Surgical Sciences and Translational Medicine, Sant’Andrea Hospital, Faculty of Medicine and Psychology, University of Rome “Sapienza,” Rome, Italy
| | | | - Jean-Marie Wenger
- Department of Obstetrics and Gynecology, University Hospital of Geneva, Geneva, Switzerland
| | - Nicola Pluchino
- Department of Obstetrics and Gynecology, University Hospital of Geneva, Geneva, Switzerland
| | - Donatella Caserta
- Department of Medical and Surgical Sciences and Translational Medicine, Sant’Andrea Hospital, Faculty of Medicine and Psychology, University of Rome “Sapienza,” Rome, Italy
| | - Roberto Marci
- Department of Obstetrics and Gynecology, University Hospital of Geneva, Geneva, Switzerland
- Department of Morphology, Surgery and Experimental Medicine, Section of Gynecology and Obstetrics, University of Ferrara, Ferrara, Italy
- WHO/RHR, Department of Reproductive Health and Research, Geneva, Switzerland
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10
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Allbee AW, Rincon-Limas DE, Biteau B. Lmx1a is required for the development of the ovarian stem cell niche in Drosophila. Development 2018; 145:dev.163394. [PMID: 29615466 DOI: 10.1242/dev.163394] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 03/26/2018] [Indexed: 01/02/2023]
Abstract
The Drosophila ovary serves as a model for pioneering studies of stem cell niches, with defined cell types and signaling pathways supporting both germline and somatic stem cells. The establishment of the niche units begins during larval stages with the formation of terminal filament-cap structures; however, the genetics underlying their development remains largely unknown. Here, we show that the transcription factor Lmx1a is required for ovary morphogenesis. We found that Lmx1a is expressed in early ovarian somatic lineages and becomes progressively restricted to terminal filaments and cap cells. We show that Lmx1a is required for the formation of terminal filaments, during the larval-pupal transition. Finally, our data demonstrate that Lmx1a functions genetically downstream of Bric-à-Brac, and is crucial for the expression of key components of several conserved pathways essential to ovarian stem cell niche development. Importantly, expression of chicken Lmx1b is sufficient to rescue the null Lmx1a phenotype, indicating functional conservation across the animal kingdom. These results significantly expand our understanding of the mechanisms controlling stem cell niche development in the fly ovary.
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Affiliation(s)
- Andrew W Allbee
- Department of Biomedical Genetics, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642, USA
| | - Diego E Rincon-Limas
- Department of Neurology, McKnight Brain Institute, University of Florida, 1149 Newell Drive, FL 32611, USA
| | - Benoît Biteau
- Department of Biomedical Genetics, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642, USA
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11
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Gu X, Gao XS, Ma M, Qin S, Qi X, Li X, Sun S, Yu H, Wang W, Zhou D. Prognostic significance of osteopontin expression in gastric cancer: a meta-analysis. Oncotarget 2018; 7:69666-69673. [PMID: 27626167 PMCID: PMC5342506 DOI: 10.18632/oncotarget.11936] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Accepted: 09/02/2016] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Accumulated studies have exploited the association between osteopontin (OPN) expression and survival of patients with gastric cancer (GC), however, the results were controversial. Thus, we performed a meta-analysis, aiming to investigate the prognostic role of OPN for GC patients and to explore the association between OPN and clinicalpathological features of GC. RESULTS A total of ten studies involving 1775 patients were included in final meta-analysis. Of the included studies, nine were conducted on Asian patients and one was performed on Caucasian patients. Regarding OPN detection, immunohistochemistry (IHC) was used on tissue specimens in eight studies and enzyme linked immunosorbent assay (ELISA) was used on plasma specimens in two studies. The pooled data showed that high OPN expression was correlated with poor OS (HR = 1.59, 95% CI: 1.15-2.22, p = 0.006). Subgroup analyses demonstrated that OPN had enhanced prognostic value for Asian patients (HR = 1.64, 95% CI = 1.11-2.41, p = 0.012) and for patients receiving surgical resection (HR = 1.6, 95% CI = 1.04-2.48, p = 0.034). In addition, the results also showed that elevated OPN expression was associated with lymph node metastasis, TNM stage, depth of invasion, tumor size and distant metastasis in GC. METHODS Relevant studies were retrieved through PubMed, Embase and Web of Science. Combined hazard ratio (HR) and 95% confidence interval (CI) were calculated to assess the association between OPN and overall survival (OS). Subgroup analyses and publication bias were also conducted. CONCLUSIONS OPN overexpression was correlated with poor OS and clinical features reflecting high aggressiveness in patients with GC. OPN was a promising prognostic biomarker for GC.
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Affiliation(s)
- Xiaobin Gu
- Department of Radiation Oncology, Peking University First Hospital, Peking University, Beijing, China
| | - Xian-Shu Gao
- Department of Radiation Oncology, Peking University First Hospital, Peking University, Beijing, China
| | - Mingwei Ma
- Department of Radiation Oncology, Peking University First Hospital, Peking University, Beijing, China
| | - Shangbin Qin
- Department of Radiation Oncology, Peking University First Hospital, Peking University, Beijing, China
| | - Xin Qi
- Department of Radiation Oncology, Peking University First Hospital, Peking University, Beijing, China
| | - Xiaoying Li
- Department of Radiation Oncology, Peking University First Hospital, Peking University, Beijing, China
| | - Shaoqian Sun
- Department of Radiation Oncology, Peking University First Hospital, Peking University, Beijing, China
| | - Hao Yu
- Department of Radiation Oncology, Peking University First Hospital, Peking University, Beijing, China
| | - Wen Wang
- Department of Radiation Oncology, Peking University First Hospital, Peking University, Beijing, China
| | - Dong Zhou
- Department of Radiation Oncology, Peking University First Hospital, Peking University, Beijing, China
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Nrf2 Expressions Correlate with WHO Grades in Gliomas and Meningiomas. Int J Mol Sci 2016; 17:ijms17050722. [PMID: 27187376 PMCID: PMC4881544 DOI: 10.3390/ijms17050722] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 04/22/2016] [Accepted: 05/04/2016] [Indexed: 12/15/2022] Open
Abstract
Background: Nuclear factor erythroid 2-related factor 2 (NFE2L2, also known as Nrf2) is associated with cellular progression and chemotherapeutic resistance in some human cancers. We tested the relationship between Nrf2 expression and survival of patients with primary brain tumors (PBTs). Methods: In order to realize Nrf2 protein expression in gliomas, Western blot analysis was performed in normal brain tissue and U87MG, LN229, GBM8401 and U118MG glioma cell lines protein lysates. Then, U87MG, LN229, and GBM8401 mRNA were applied to performed quantitative RT-PCR for detect Nrf2 gene expression in glioma cell lines. At last, immunohistochemical analysis was used to determine the expression of Nrf2 in samples from 178 PBTs and 10 non-neoplastic brain tissues. Results: In these included in vitro studies, both Nrf2 protein and mRNA expression in all human glioma cell lines were higher than normal brain tissue. Similarly, on the viewpoint of immunohistochemistry, Nrf2 expression in gliomas were positively correlated with World Health Organization (WHO) grades. Additionally, compared with the expression of Nrf2 in non-neoplastic brain tissue, expression in meningiomas was of a stronger intensity and was present in a higher percentage of cells. Furthermore, scores were significantly higher in WHO grade II than in WHO grade I meningiomas. Finally, overall survival tended to be shorter in patients whose PBTs had higher expression of Nrf2, although the correlation was not statistically significant. Conclusions: Nrf2 overexpression positively correlated with WHO grade in gliomas and meningiomas. On the other hand, Nrf2 immunohistochemical stain could help pathologists to differentiate atypical meningiomas from benign tumors. Therefore, Nrf2 expression may be a useful biomarker to predict WHO grade and cellular behavior of PBTs.
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Cell fate determination, neuronal maintenance and disease state: The emerging role of transcription factors Lmx1a and Lmx1b. FEBS Lett 2015; 589:3727-38. [PMID: 26526610 DOI: 10.1016/j.febslet.2015.10.020] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Revised: 10/06/2015] [Accepted: 10/15/2015] [Indexed: 01/28/2023]
Abstract
LIM-homeodomain (LIM-HD) proteins are evolutionary conserved developmental transcription factors. LIM-HD Lmx1a and Lmx1b orchestrate complex temporal and spatial gene expression of the dopaminergic pathway, and evidence shows they are also involved in adult neuronal homeostasis. In this review, the multiple roles played by Lmx1a and Lmx1b will be discussed. Controlled Lmx1a and Lmx1b expression and activities ensure the proper formation of critical signaling centers, including the embryonic ventral mesencephalon floor plate and sharp boundaries between lineage-specific cells. Lmx1a and Lmx1b expression persists in mature dopaminergic neurons of the substantia nigra pars compacta and the ventral tegmental area, and their role in the adult brain is beginning to be revealed. Notably, LMX1B expression was lower in brain tissue affected by Parkinson's disease. Actual and future applications of Lmx1a and Lmx1b transcription factors in stem cell production as well as in direct conversion of fibroblast into dopaminergic neurons are also discussed. A thorough understanding of the role of LMX1A and LMX1B in a number of disease states, including developmental diseases, cancer and neurodegenerative diseases, could lead to significant benefits for human healthcare.
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Association of osteopontin expression with the prognosis of glioma patient: a meta-analysis. Tumour Biol 2014; 36:429-36. [PMID: 25266800 DOI: 10.1007/s13277-014-2645-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Accepted: 09/18/2014] [Indexed: 02/08/2023] Open
Abstract
So far, several studies on the association between osteopontin (OPN) expression and glioma have been performed, but the conclusion still was not clear. The aim of the present meta-analysis was to determine the relationship between OPN expression and prognosis of patients with glioma. The electronic database was searched for articles on the association between OPN expression and glioma until 31 January 2014. Odds ratios (OR) and the relative risks with 95 % CI were utilized to analyze the qualitative data in retrospective studies and prospective studies, respectively. The standardized mean difference and the corresponding 95 % CI were used for analyzing the studies with quantitative data. Heterogeneity of all included studies was assessed using Cochrane's Q test and I (2) measurement. The publication bias was examined by the Egger test. Sixteen cohort studies (854 patients) on OPN expression and gliomas prognosis were included in the present meta-analysis. It was found that OPN expression was significantly higher in patients with high-grade glioma than in patients with low-grade glioma (χ (2) = 8.38, I (2) = 16.6 %, P = 0.300), and the expression of OPN increased with glioma grade. The combined data showed the correlation between high OPN expression and tumor reoccurrence (OR = 18.61, 95 % CI = 6.34-54.67, P = 0.405). In addition, the results of the pooled analysis indicated that OPN expression was significantly related to overall survival (HR = 1.83; 95 % CI = 1.36-2.46). In conclusion, OPN may be a biomarker for predicting the prognosis of gliomas.
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Evaluation of osteopontin as a potential biomarker for central nervous system embryonal tumors. J Neurooncol 2014; 119:343-51. [DOI: 10.1007/s11060-014-1484-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Accepted: 05/19/2014] [Indexed: 12/11/2022]
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Retraction. Effects of osteopontin on expression of IL-6 and IL-8 inflammatory factors in human knee osteoarthritis chondrocytes. Cell Biochem Biophys 2014; 70:703. [PMID: 24728945 DOI: 10.1007/s12013-014-9880-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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WANG XI, HE CHAO, HU XIAOTONG. LIM homeobox transcription factors, a novel subfamily which plays an important role in cancer (Review). Oncol Rep 2014; 31:1975-85. [DOI: 10.3892/or.2014.3112] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2014] [Accepted: 03/13/2014] [Indexed: 11/06/2022] Open
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Sayegh L, Fuleihan GEH, Nassar AH. Vitamin D in endometriosis: a causative or confounding factor? Metabolism 2014; 63:32-41. [PMID: 24135500 DOI: 10.1016/j.metabol.2013.09.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 09/16/2013] [Accepted: 09/16/2013] [Indexed: 12/31/2022]
Abstract
OBJECTIVE The aim of this paper is to review the evidence from studies that evaluated the relationship between vitamin D and endometriosis. DESIGN Comprehensive review. MATERIALS AND METHODS Systematic literature search in Medline for relevant publications from 1946 until June 2013. RESULTS Endometriosis risk may be influenced by dietary vitamin D intake and plasma hydroxyvitamin D concentration. Vitamin D receptor and vitamin D metabolizing enzymes, 24-hydroxylase and 1-α hydroxylase, are found in the normal cycling endometrium and also in the eutopic and ectopic endometrium of women with endometriosis. The endometrium is a target of 1, 25 dihydroxyvitamin D actions through regulation of specific genes and via immunomodulation. The endometrium in endometriosis expresses dysregulation of some vitamin D enzymes and receptors. If vitamin D and its metabolites are implicated in endometriosis-associated infertility, it is likely through interference with HOXA10 gene expression. The Gc2 phenotype of vitamin D binding protein is prevalent in women with endometriosis and may be implicated in its pathogenesis. In a mouse model, Elocalcitol, a VDR-agonist was shown to reduce the development of endometriotic lesions and recurrence. CONCLUSION A biological plausibility for a role of vitamin D, as an immunomodulator and anti-inflammatory agent, in the pathogenesis and treatment of endometriosis is suggested in this article, but is difficult to illustrate due to sparse evidence from human studies limited primarily to case-control studies. A significant knowledge gap precludes the establishment of a clear cause-effect relationship. The intriguing leads presented herein need to be investigated further with placebo-controlled supplementation trials.
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Affiliation(s)
- Lamia Sayegh
- Department of Obstetrics and Gynecology, American University of Beirut Medical Center, Beirut, Lebanon
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