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Lysosome and migration

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https://www.readbyqxmd.com/read/29668344/phenotypic-plasticity-of-mesenchymal-stem-cells-is-crucial-for-mesangial-repair-in-a-model-of-immunoglobulin-light-chain-associated-mesangial-damage
#1
Guillermo A Herrera, Jiamin Teng, Chun Zeng, Hongzhi Xu, Man Liang, J Steven Alexander, Bing Liu, Chris Boyer, Elba A Turbat-Herrera
Mesangiopathies produced by glomerulopathic monoclonal immunoglobulin light chains (GLCs) acting on the glomerular mesangium produce two characteristic lesions: AL-amyloidosis (AL-Am) and light chain deposition disease (LCDD). In both cases, the pathology is centered in the mesangium, where initial and progressive damage occurs. In AL-Am the mesangial matrix is destroyed and replaced by amyloid fibrils and in LCDD, the mesangial matrix is increased and remodeled. The collagen IV rich matrix is replaced by tenascin...
April 18, 2018: Ultrastructural Pathology
https://www.readbyqxmd.com/read/29659741/formin-2-regulates-lysosomal-degradation-of-wnt-associated-%C3%AE-catenin-in-neural-progenitors
#2
Gewei Lian, Anjen Chenn, Victor Ekuta, Sneha Kanaujia, Volney Sheen
Although neural progenitor proliferation along the ventricular zone is regulated by β-catenin through Wnt signaling, the cytoskeletal mechanisms that regulate expression and localization of these proteins are not well understood. Our prior studies have shown that loss of the actin-binding Filamin A (FlnA) and actin-nucleating protein Formin 2 (Fmn2) impairs endocytosis of low-density-lipoprotein-receptor-related protein 6 (Lrp6), thereby disrupting β-catenin activation, resulting in decreased brain size. Here, we report that activated RhoA-GTPase disengages Fmn2 N- to C-terminal binding to promote Fmn2 activation and redistribution into lysosomal vesicles...
April 5, 2018: Cerebral Cortex
https://www.readbyqxmd.com/read/29623762/degraded-melanocores-are-incompetent-to-protect-epidermal-keratinocytes-against-uv-damage
#3
Wen-Juan Yi, Meng-Yun Su, Ying Shi, Shan Jiang, Shi-Zheng Xu, Tie-Chi Lei
Melanosomes are membrane-bound intracellular organelles that are uniquely generated by melanocytes (MCs) in the basal layer of human epidermis. Highly pigmented mature melanosomes are transferred from melanocytes (MCs) to keratinocytes (KCs), and then positioned in the supra-nuclear region to ensure protection against ultraviolet radiation (UVR). However, the molecular mechanism underlying melanosome (or melanin pigment) transfer remains enigmatic. Emerging evidence shows that exo-/endo-cytosis of the melanosome core (termed melanocore) has been considered as the main transfer manner between MCs and KCs...
April 6, 2018: Cell Cycle
https://www.readbyqxmd.com/read/29622794/rab34-regulates-adhesion-migration-and-invasion-of-breast-cancer-cells
#4
Lixiang Sun, Xiaohui Xu, Yongjun Chen, Yuxia Zhou, Ran Tan, Hantian Qiu, Liting Jin, Wenyi Zhang, Rong Fan, Wanjin Hong, Tuanlao Wang
The small GTPase Rab34 regulates spatial distribution of the lysosomes, secretion, and macropinocytosis. In this study, we found that Rab34 is over-expressed in aggressive breast cancer cells, implying a potential role of Rab34 in breast cancer. Silencing Rab34 by shRNA inhibits cell migration, invasion, and adhesion of breast cancer cells. Rab34 specifically binds to the cytoplasmic tail of integrin β3, and depletion of Rab34 promotes the degradation of integrin β3. Interestingly, EGF induces the translocation of Rab34 to the membrane ruffle, which is greatly enhanced by the expression of Src kinase...
April 6, 2018: Oncogene
https://www.readbyqxmd.com/read/29573490/extracellular-matrix-internalization-links-nutrient-signalling-to-invasive-migration
#5
REVIEW
Elena Rainero
Integrins are the key mediators of cell-extracellular matrix (ECM) interaction, linking the ECM to the actin cytoskeleton. Besides localizing at the cell surface, they can be internalized and transported back to the plasma membrane (recycled) or delivered to the late endosomes/lysosomes for degradation. We and others have shown that integrin can be endocytosed together with their ECM ligands. In this short review, I will highlight how extracellular protein (including ECM) endocytosis impinges on the activation of the mechanistic target of rapamycin (mTOR) pathway, a master regulator of cell metabolism and growth...
March 24, 2018: International Journal of Experimental Pathology
https://www.readbyqxmd.com/read/29547664/overlapping-expression-patterns-and-functions-of-three-paralogous-p5b-atpases-in-caenorhabditis-elegans
#6
Jeffrey Zielich, Elena Tzima, Eva Ayla Schröder, Faten Jemel, Barbara Conradt, Eric J Lambie
P5B ATPases are present in the genomes of diverse unicellular and multicellular eukaryotes, indicating that they have an ancient origin, and that they are important for cellular fitness. Inactivation of ATP13A2, one of the four human P5B ATPases, leads to early-onset Parkinson's disease (Kufor-Rakeb Syndrome). The presence of an invariant PPALP motif within the putative substrate interaction pocket of transmembrane segment M4 suggests that all P5B ATPases might have similar transport specificity; however, the identity of the transport substrate(s) remains unknown...
2018: PloS One
https://www.readbyqxmd.com/read/29538296/sinomenine-hydrochloride-inhibits-the-metastasis-of-human-glioblastoma-cells-by-suppressing-the-expression-of-matrix-metalloproteinase-2-9-and-reversing-the-endogenous-and-exogenous-epithelial-mesenchymal-transition
#7
Yumao Jiang, Yue Jiao, Yang Liu, Meiyu Zhang, Zhiguo Wang, Yujuan Li, Tao Li, Xiaoliang Zhao, Danqiao Wang
As shown in our previous study, sinomenine hydrochloride (SH), the major bioactive alkaloid isolated from Sinomenium acutum Rehd. et Wils. (Fam. Menispermaceae ), initiates the autophagy-mediated death of human glioblastoma cells by generating reactive oxygen species and activating the autophagy-lysosome pathway. However, its effects on the migration and invasion of human glioblastoma cells have not yet been elucidated. Therefore, human glioblastoma U87 and SF767 cells were treated with SH (0.125 and 0.25 mM) for 24 h, and cell migration and invasion were assessed using scratch wound healing, migration and invasion assays...
March 14, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29467198/endothelial-tfeb-transcription-factor-eb-positively-regulates-postischemic-angiogenesis
#8
Yanbo Fan, Haocheng Lu, Wenying Liang, Minerva T Garcia-Barrio, Yanhong Guo, Ji Zhang, Tianqing Zhu, Yibai Hao, Jifeng Zhang, Y Eugene Chen
RATIONALE: Postischemic angiogenesis is critical to limit the ischemic tissue damage and improve the blood flow recovery. The regulation and the underlying molecular mechanisms of postischemic angiogenesis are not fully unraveled. TFEB (transcription factor EB) is emerging as a master gene for autophagy and lysosome biogenesis. However, the role of TFEB in vascular disease is less understood. OBJECTIVE: We aimed to determine the role of endothelial TFEB in postischemic angiogenesis and its underlying molecular mechanism...
March 30, 2018: Circulation Research
https://www.readbyqxmd.com/read/29464085/intravesicular-epidermal-growth-factor-receptor-subject-to-retrograde-trafficking-drives-epidermal-growth-factor-dependent-migration
#9
Sabrina Maisel, Derrick Broka, Joyce Schroeder
The Epidermal Growth Factor Receptor (EGFR) is frequently mutated and overexpressed in metastatic cancer. Although EGFR is a transmembrane tyrosine kinase localized to the basolateral membrane in normal epithelium, it is frequently found intracellularly localized in transformed cells. We have previously demonstrated the epithelial adaptor protein mucin 1 (MUC1) alters trafficking of EGFR, inhibiting its degradation and promoting its translocation to the nucleus, where it can directly modulate gene transcription...
January 19, 2018: Oncotarget
https://www.readbyqxmd.com/read/29455656/the-e3-ubiquitin-ligase-nedd4-mediates-cell-migration-signaling-of-egfr-in-lung-cancer-cells
#10
Genbao Shao, Ranran Wang, Aiqin Sun, Jing Wei, Ke Peng, Qian Dai, Wannian Yang, Qiong Lin
BACKGROUND: EGFR-dependent cell migration plays an important role in lung cancer progression. Our previous study observed that the HECT E3 ubiquitin ligase NEDD4 is significantly correlated with tumor metastasis and required for migration and invasion signaling of EGFR in gastric cancer cells. However, how NEDD4 promotes the EGFR-dependent lung cancer cell migration is unknown. This study is to elucidate the mechanism by which NEDD4 mediates the EGFR lung cancer migration signaling. METHODS: Lentiviral vector-loaded NEDD4 shRNA was used to deplete endogenous NEDD4 in lung cancer cell lines...
February 19, 2018: Molecular Cancer
https://www.readbyqxmd.com/read/29444517/acetyl-coa-synthetase-2-promotes-cell-migration-and-invasion-of-renal-cell-carcinoma-by-upregulating-lysosomal-associated-membrane-protein-1-expression
#11
Lv Yao, Xiaoqiang Guo, Yaoting Gui
BACKGROUND/AIMS: Reprogramming energy metabolism is an emerging hallmark of many cancers, and this alteration is especially evident in renal cell carcinomas (RCCs). However, few studies have been conducted on lipid metabolism. This study investigated the function and mechanism of lipid metabolism-related acetyl-CoA synthetase 2 (ACSS2) in RCC development, cell migration and invasion. METHODS: Quantitative real-time PCR (qRT-PCR) was used to determine the expression of ACSS2 in cancer tissue and adjacent tissue...
2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29413706/photodynamic-effect-and-mechanism-study-of-selenium-enriched-phycocyanin-from-spirulina-platensis-against-liver-tumours
#12
Zijian Liu, Xiang Fu, Wei Huang, Chunxia Li, Xinyan Wang, Bei Huang
Selenium-containing phycocyanin (Se-PC) has been proved to have many biological effects, including anti-inflammatory and antioxidant. In this study, we investigated the photodynamic therapy (PDT) effects of Se-PC against liver tumour in vitro and in vivo experiment. Our results demonstrated that the half lethal dose of Se-PC PDT on HepG2 cells was 100μg/ml PC containing 20% selenium. Se-PC location migration from lysosomes to mitochondria was time dependent. In in vivo experiments, the tumour inhibition rate was 75...
March 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29378908/the-transcription-factor-ap4-promotes-oncogenic-phenotypes-and-cisplatin-resistance-by-regulating-laptm4b-expression
#13
Lu Wang, Yue Meng, Jian-Jun Xu, Qing-Yun Zhang
Lysosomal-associated protein transmembrane-4 beta (LAPTM4B) is a novel oncogene, whose overexpression is involved in cancer occurrence and progression. However, the mechanism of LAPTM4B transcriptional regulation remains unclear. In this study, the results of transcription factor (TF) profiling plate arrays indicated that AP4 was a potential transcription factor regulating LAPTM4B expression. LAPTM4B was positively correlated with AP4 and they were both associated with poor overall and disease-free survival...
January 29, 2018: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/29375970/turning-the-old-adjuvant-from-gel-to-nanoparticles-to-amplify-cd8-t-cell-responses
#14
Hao Jiang, Qin Wang, Lin Li, Qin Zeng, Hanmei Li, Tao Gong, Zhirong Zhang, Xun Sun
Due to its safety and efficacy, aluminum hydroxide is used as an immune adjuvant in human vaccines for over 80 years. Being a Th2 stimulator, the classical gel-like adjuvant, however, fails to generate CD8+ T cell responses, which are important for cancer vaccines. Here, aluminum hydroxide is turned from gel into nano-sized vaccine carriers AlO(OH)-polymer nanoparticles (APNs) to promote their lymphatic migration. After actively uptaken via scavenger receptor-A by antigen-presenting cells (APCs) resident in lymph nodes (LNs), APNs destabilize lysosomes resulting in efficient cytosolic delivery and cross-presentation of antigens...
January 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/29371914/mael-contributes-to-gastric-cancer-progression-by-promoting-ilkap-degradation
#15
Xing Zhang, Yichong Ning, Yuzhong Xiao, Huaxin Duan, Guifang Qu, Xin Liu, Yan Du, Dejian Jiang, Jianlin Zhou
The cancer-testis gene MAEL is involved in the development and progression of bladder, liver and colorectal cancers. However, its role in other cancers is unclear. By systematically analyzing transcriptomics and genomics data from various cancer databases, we identified that the MAEL gene is aberrantly elevated in gastric cancer (GC) tissues and that its expression is strongly negatively correlated with DNA methylation (Pearson's correlation coefficient = -0.675). Survival analysis revealed that MAEL expression may serve as a prognostic marker for GC patients (overall survival: hazard ratio [HR] = 1...
December 26, 2017: Oncotarget
https://www.readbyqxmd.com/read/29358326/oxysterol-binding-protein-related-protein-5-orp5-promotes-cell-proliferation-by-activation-of-mtorc1-signaling
#16
Ximing Du, Armella Zadoorian, Ivan E Lukmantara, Yanfei Qi, Andrew J Brown, Hongyuan Yang
Oxysterol-binding protein (OSBP) and OSBP-related proteins (ORPs) constitute a large family of proteins that mainly function in lipid transport and sensing. ORP5 is an endoplasmic reticulum (ER)-anchored protein implicated in lipid transfer at the contact sites between the ER and other membranes. Recent studies indicate that ORP5 is also involved in cancer cell invasion and tumor progression. However, the molecular mechanism underlying ORP5's involvement in cancer is unclear. Here, we report that ORP5 promotes cell proliferation and motility of HeLa cells, an effect that depends on its functional OSBP-related domain (ORD)...
March 9, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29358211/the-cullin-3-rbx1-kctd10-complex-controls-endothelial-barrier-function-via-k63-ubiquitination-of-rhob
#17
Igor Kovačević, Tomohisa Sakaue, Jisca Majoleé, Manon C Pronk, Masashi Maekawa, Dirk Geerts, Mar Fernandez-Borja, Shigeki Higashiyama, Peter L Hordijk
RhoGTPases control endothelial cell (EC) migration, adhesion, and barrier formation. Whereas the relevance of RhoA for endothelial barrier function is widely accepted, the role of the RhoA homologue RhoB is poorly defined. RhoB and RhoA are 85% identical, but RhoB's subcellular localization and half-life are uniquely different. Here, we studied the role of ubiquitination for the function and stability of RhoB in primary human ECs. We show that the K63 polyubiquitination at lysine 162 and 181 of RhoB targets the protein to lysosomes...
March 5, 2018: Journal of Cell Biology
https://www.readbyqxmd.com/read/29331585/cathepsin-l-promotes-ionizing-radiation-induced-u251-glioma-cell-migration-and-invasion-through-regulating-the-gsk-3%C3%AE-cux1-pathway
#18
Yao Fei, Yajie Xiong, Xiao Shen, Yifan Zhao, Ying Zhu, Long Wang, Zhongqin Liang
Cathepsin L (CTSL) is a lysosomal cysteine protease overexpressed and secreted by tumor cells. Our previous study found that CTSL was involved in ionizing radiation (IR)-induced epithelial-mesenchymal transition (EMT) and the increase of glioma invasion and migration. However, the mechanisms by which CTSL promoted this IR-induced glioma migration and invasion remained unclear. In this study, we demonstrated that IR reduced glycogen synthase kinase-3β (GSK-3β) activity, via the CTSL-mediated phosphorylation of its serine-9 residue, in U251 cells...
April 2018: Cellular Signalling
https://www.readbyqxmd.com/read/29318884/inhibition-of-epithelial-mesenchymal-transition-and-tissue-regeneration-by-waterborne-titanium-dioxide-nanoparticles
#19
Xiaojiao Li, Lele Song, Xingjie Hu, Chang Liu, Jiye Shi, Hui Wang, Lixing Zhan, Haiyun Song
Titanium dioxide nanoparticles (TiO2 NPs) are among the most widely manufactured nanomaterials with broad applications in food industry, cosmetics, and medicine. Although the toxicity of TiO2 NPs at high doses has been extensively explored, the potential health risks of TiO2 NPs exposure at nontoxic concentrations remain poorly understood. Epithelial-mesenchymal transition (EMT) plays pivotal roles in a diversity of physiological and pathological processes, including tissue regeneration and cancer metastasis...
January 31, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29317261/insulin-induced-translocation-of-ir-to-the-nucleus-in-insulin-responsive-cells-requires-a-nuclear-translocation-sequence
#20
Dov Kesten, Miriam Horovitz-Fried, Tamar Brutman-Barazani, Sanford R Sampson
Insulin binding to its cell surface receptor (IR) activates a cascade of events leading to its biological effects. The Insulin-IR complex is rapidly internalized and then is either recycled back to the plasma membrane or sent to lysosomes for degradation. Although most of the receptor is recycled or degraded, a small amount may escape this pathway and migrate to the nucleus of the cell where it might be important in promulgation of receptor signals. In this study we explored the mechanism by which insulin induces IR translocation to the cell nucleus...
April 2018: Biochimica et Biophysica Acta
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