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Dong F, Liu Y, Yan W, Meng Q, Song X, Cheng B, Yao R. Netrin-4: Focus on Its Role in Axon Guidance, Tissue Stability, Angiogenesis and Tumors. Cell Mol Neurobiol 2022:10.1007/s10571-022-01279-4. [DOI: 10.1007/s10571-022-01279-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 08/26/2022] [Indexed: 11/11/2022]
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Zhang MM, Sun F, Cui B, Zhang LL, Fang Y, Li Y, Zhang RJ, Ye XP, Ma YR, Han B, Song HD. Tumor-suppressive function of UNC5D in papillary thyroid cancer. Oncotarget 2017; 8:96126-96138. [PMID: 29221192 PMCID: PMC5707086 DOI: 10.18632/oncotarget.21759] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 06/28/2017] [Indexed: 12/23/2022] Open
Abstract
Background Studies have shown an association of the UNC5D gene with kidney and bladder cancer and neuroblastoma. We investigated whether UNC5D acts as a tumor suppressor in papillary thyroid carcinoma (PTC). Methods Primary PTC tumors and matched normal thyroid tissues were obtained from 112 patients to detect UNC5D mRNA by real-time PCR. Genomic DNA sequencing was performed to detect BRAF mutation in PTC tumors. The association between UNC5D expression and clinicopathological data from PTC patients was reviewed retrospectively. PTC-derived cancer cell lines TPC-1 and K1 with stable transfection of UNC5D were used to investigate the functions of UNC5D. Flow cytometry, CCK-8, Transwell assay and scratch tests were used to examine cell cycle distribution, proliferation and migration. Results The expression of UNC5D was significantly decreased in PTC compared with adjacent normal thyroid tissues. Lower UNC5D expression was significantly associated with aggressive tumor behaviors, such as lymph node metastasis and BRAF mutation. Overexpression of UNC5D significantly suppressed malignant cell behaviors, including cell proliferation and migration, as well as tumor growth in vivo. Conclusions These findings suggest a potential tumor suppressor role of UNC5D in PTC progression; and provide insight into potential clinical relevance for the prognosis of PTC.
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Affiliation(s)
- Man-Man Zhang
- The Core Laboratory in Medicine Center of Clinical Research, Department of Endocrinology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, China
| | - Feng Sun
- The Core Laboratory in Medicine Center of Clinical Research, Department of Endocrinology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, China
| | - Bing Cui
- Department of Transfusion, The Hospital Affiliated to Jiangsu University, Zhenjiang 212001, China
| | - Le-Le Zhang
- The Core Laboratory in Medicine Center of Clinical Research, Department of Endocrinology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, China
| | - Ya Fang
- The Core Laboratory in Medicine Center of Clinical Research, Department of Endocrinology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, China
| | - Yan Li
- The Core Laboratory in Medicine Center of Clinical Research, Department of Endocrinology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, China
| | - Rui-Jia Zhang
- The Core Laboratory in Medicine Center of Clinical Research, Department of Endocrinology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, China
| | - Xiao-Ping Ye
- The Core Laboratory in Medicine Center of Clinical Research, Department of Endocrinology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, China
| | - Yu-Ru Ma
- The Core Laboratory in Medicine Center of Clinical Research, Department of Endocrinology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, China
| | - Bing Han
- The Core Laboratory in Medicine Center of Clinical Research, Department of Endocrinology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, China
| | - Huai-Dong Song
- The Core Laboratory in Medicine Center of Clinical Research, Department of Endocrinology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, China
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Overexpression of the dependence receptor UNC5H4 inhibits cell migration and invasion, and triggers apoptosis in neuroblastoma cell. Tumour Biol 2014; 35:5417-25. [PMID: 24519068 DOI: 10.1007/s13277-014-1706-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Accepted: 01/27/2014] [Indexed: 10/25/2022] Open
Abstract
UNC5H4 is a newly identified member of the UNC5H receptor family. Previously, we have demonstrated that UNC5H4 expression is significantly higher in favorable neuroblastomas than in unfavorable ones, and higher UNC5H4 level is correlated with longer survival time. However, the function of UNC5H4 in the tumorigenesis of neuroblastoma still remains elusive. In the present study, the effects of UNC5H4 overexpression on neuroblastoma SH-SY5Y cells were investigated. We showed that enforced expression of UNC5H4 receptor significantly inhibited anchorage-dependent and anchorage-independent growth of SH-SY5Y cells. Cell migration and invasion of SH-SY5Y cells transfected with UNC5H4-expressing plasmid were obviously suppressed as compared to those transfected with emptor vector or non-transfected cells. Moreover, overexpression of UNC5H4 resulted in apoptosis in SH-SY5Y cells. The induction of apoptosis by UNC5H4 was completely abolished in the presence of its ligand, netrin-1. Finally, caspase cleavage and the presence of death domain were required for UNC5H4 to induce apoptosis in neuroblastoma SH-SY5Y cells. These data suggest that the dependence receptor UNC5H4 may act as a putative tumor suppressor in neuroblastoma.
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Lu D, Dong D, Zhou Y, Lu M, Pang XW, Li Y, Tian XJ, Zhang Y, Zhang J. The tumor-suppressive function of UNC5D and its repressed expression in renal cell carcinoma. Clin Cancer Res 2013; 19:2883-92. [PMID: 23589179 DOI: 10.1158/1078-0432.ccr-12-2978] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE As a newly added member of the UNC5H receptors, the function of UNC5D/H4 in tumorigenesis remains poorly defined. The aim of this study was to examine the expression of UNC5D in primary renal cell carcinomas (RCC), analyze the mechanisms responsible for its downregulation in RCC, and assess its functional relevance to tumor growth and migration. EXPERIMENTAL DESIGN Forty-four paired primary RCCs and corresponding adjacent noncancerous tissues were collected. The mRNA and protein expression level of UNC5D was assessed by reverse transcriptase-PCR, real-time PCR, or immunohistochemistry. Epigenetic alterations in UNC5D promoter and LOH in the UNC5D locus were also analyzed. Ectopic expression of UNC5D in renal cancer cells with silenced expression of UNC5D was used for analysis of the biologic functions of UNC5D. RESULTS UNC5D expression was attenuated in multiple carcinoma cell lines including renal cancer cells. Similar reduction was also observed in primary RCC tissues as compared with paired adjacent noncancerous tissues. Methylation-specific PCR showed hypermethylation in UNC5D promoter in a significant proportion (18 of 44) of tumor tissue (40.9%). LOH of UNC5D was observed in 13 of 44 patients with RCCs (29.5%). Restoration of UNC5D expression in renal cancer cells significantly inhibited cell proliferation, anchorage-dependent and -independent growth, as well as migration and invasion, whereas knockdown of UNC5D promoted cell growth. Furthermore, ectopic expression of UNC5D induced G2-M cell-cycle arrest. CONCLUSIONS UNC5D is a functional tumor suppressor that is frequently downregulated in RCCs due to promoter hypermethylation and LOH.
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Affiliation(s)
- Dan Lu
- Department of Immunology, Key Laboratory of Medical Immunology (Ministry of Health), Peking University Health Science Center, Beijing, China
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Hou ST, Jiang SX, Smith RA. Permissive and repulsive cues and signalling pathways of axonal outgrowth and regeneration. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2008; 267:125-81. [PMID: 18544498 DOI: 10.1016/s1937-6448(08)00603-5] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Successful axonal outgrowth in the adult central nervous system (CNS) is central to the process of nerve regeneration and brain repair. To date, much of the knowledge on axonal guidance and outgrowth comes from studies on neuritogenesis and patterning during development where distal growth cones constantly sample the local environment and respond to specific physical and trophic influences. Opposing permissive (e.g., growth factors) and hostile signals (e.g., repulsive cues) are processed, leading to growth cone remodelling, and a concomitant restructuring of the cytoskeleton, thereby permitting pioneering extension and a potential for establishing synaptic connections. Repulsive cues, such as semaphorins, ephrins and myelin-secreted inhibitory glycoproteins, act through their respective receptors to affect the collapsing or turning of growth cones via several pathways, such as the Rho GTPases signalling which precipitates the cytoskeletal changes. One of the direct modulators of microtubules is the family of brain-specific proteins, collapsin response mediator protein (CRMP). Exciting evidence emerged recently that cleavage of CRMPs in response to injury-activated proteases, such as calpain, signals axonal retraction and neuronal death in adult post-mitotic neurons, while blocking this signal transduction prevents axonal retraction and death following excitotoxic insult and cerebral ischemia. Regeneration is minimal in injured postnatal CNS, albeit the occurrence of some limited remodelling in areas where synaptic plasticity is prevalent. Frequently in the absence of axonal regeneration, there is not only an inevitable loss of functional connections, but also a loss of neurons, such as through the actions of dependence receptors. Deciphering the cues and signalling pathways of axonal guidance and outgrowth may hold the key to fully understanding nerve regeneration and brain repair, thereby opening the way for developing potential therapeutics.
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Affiliation(s)
- Sheng T Hou
- Institute for Biological Sciences, National Research Council of Canada, Ottawa, Ontario, K1A 0R6, Canada
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