1
|
An Update of G-Protein-Coupled Receptor Signaling and Its Deregulation in Gastric Carcinogenesis. Cancers (Basel) 2023; 15:cancers15030736. [PMID: 36765694 PMCID: PMC9913146 DOI: 10.3390/cancers15030736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 01/15/2023] [Accepted: 01/19/2023] [Indexed: 01/27/2023] Open
Abstract
G-protein-coupled receptors (GPCRs) belong to a cell surface receptor superfamily responding to a wide range of external signals. The binding of extracellular ligands to GPCRs activates a heterotrimeric G protein and triggers the production of numerous secondary messengers, which transduce the extracellular signals into cellular responses. GPCR signaling is crucial and imperative for maintaining normal tissue homeostasis. High-throughput sequencing analyses revealed the occurrence of the genetic aberrations of GPCRs and G proteins in multiple malignancies. The altered GPCRs/G proteins serve as valuable biomarkers for early diagnosis, prognostic prediction, and pharmacological targets. Furthermore, the dysregulation of GPCR signaling contributes to tumor initiation and development. In this review, we have summarized the research progress of GPCRs and highlighted their mechanisms in gastric cancer (GC). The aberrant activation of GPCRs promotes GC cell proliferation and metastasis, remodels the tumor microenvironment, and boosts immune escape. Through deep investigation, novel therapeutic strategies for targeting GPCR activation have been developed, and the final aim is to eliminate GPCR-driven gastric carcinogenesis.
Collapse
|
2
|
Alteration of Cellular Energy Metabolism through LPAR2-Axin2 Axis in Gastric Cancer. Biomolecules 2022; 12:biom12121805. [PMID: 36551233 PMCID: PMC9775664 DOI: 10.3390/biom12121805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/29/2022] [Accepted: 11/29/2022] [Indexed: 12/12/2022] Open
Abstract
Lysophosphatidic acid (LPA), a multifunctional endogenous phospholipid, plays a vital role in cellular homeostasis and the malignant behavior of cancer cells through G-protein-coupled receptors. However, the role of LPA in β-catenin-mediated gastric cancer is unknown. Here, we have noted the high expression of LPAR2 in human gastric cancer tissues, and that LPA treatment significantly increased the proliferation, migration, and invasion of human gastric cancer cells. Results from our biochemical experiments showed that an LPA exposure increased the expression of β-catenin and its nuclear localization, increased the phosphorylation of glycogen synthase kinase 3β (GSK-3β), decreased the expression of Axin2, and increased the expression of the target genes of the β-catenin signaling pathway. The LPA2 receptor (LPAR2) antagonist significantly reduced the LPA-induced nuclear localization of β-catenin, the primary signaling event. The knockdown of LPAR2 in the gastric cancer cell lines robustly reduced the LPA-induced β-catenin activity. An LPA exposure increased the ATP production by both oxidative phosphorylation and glycolysis, and this effect was abrogated with the addition of an LPAR2 antagonist and XAV393, which stabilizes the Axin and inhibits the β-catenin signaling pathway. Based on our findings, the possibility that LPA contributes to gastric cancer initiation and progression through the β-catenin signaling pathway as well as by the dysregulation of the energy metabolism via the LPAR2 receptor and Axin2, respectively, provides a novel insight into the mechanism of and possible therapeutic targets of gastric cancer.
Collapse
|
3
|
Wang Y, Qi Z, Li Z, Bai S, Damirin A. LPAR2-mediated action promotes human renal cell carcinoma via MAPK/NF-κB signaling to regulate cytokine network. J Cancer Res Clin Oncol 2022; 149:2041-2055. [PMID: 35857125 DOI: 10.1007/s00432-022-04197-6] [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: 04/29/2022] [Accepted: 07/07/2022] [Indexed: 10/17/2022]
Abstract
PURPOSE Lysophosphatidic acid (LPA) exerts various physiological and pathological effects by activating its distinct G-protein-coupled LPA receptors. We demonstrated that LPA can increase the migration and proliferation of renal carcinoma cells. Meanwhile, LPAR1 and LPAR2 were preferentially expressed in renal cancer (RC) cell lines. So, the study aimed to determine the LPA receptor subtypes involved in LPA-induced actions and whether they could be used as a precision therapeutic target for renal cancer. METHODS Biological approaches combined with big data analysis were used to demonstrate the role of LPAR2 in the progression of renal cancer. RESULTS We found that the proliferation, clone formation, and migration in response to LPA were enhanced in LPAR2-overexpressing renal cancer cells, whereas, the actions were suppressed by LPAR2 antagonist in the cells. LPAR2 has also shown clinical diagnostic and prognostic value in renal carcinoma based on bioinformatics analysis and clinical tissue microarray analysis. In vivo study shown that tumor growth and metastasis were significantly increased in the LPAR2-overexpressing cells-derived solid tumors. LPA stimulated MAPK and NF-κB activation, and LPA-induced actions were inhibited by MAPKs and NF-κB inhibitors, respectively. Subsequently, the transcriptomic results revealed that LPAR2 strongly affected the cytokines production, and the increased IL6, CXCL8, and TNF were confirmed again using Kit assay. CONCLUSIONS We have identified that LPAR2 is critical for LPA-promoted renal cancer progression, and the actions mainly dependent the MAPK and NF-κB activation mechanism. Then, the expression of inflammatory factors activated by NF-κB is also suspected to be involved in LPAR2-mediated carcinogenesis. Thus, LPAR2 may be a promising therapeutic target for renal cancer.
Collapse
Affiliation(s)
- Yuewu Wang
- School of Life Sciences, Inner Mongolia University, Hohhot, 010110, Inner Mongolia, China.,College of Pharmacy, Inner Mongolia Medical University, Hohhot, 010110, Inner Mongolia, China
| | - Zhimin Qi
- School of Life Sciences, Inner Mongolia University, Hohhot, 010110, Inner Mongolia, China
| | - Ze Li
- School of Life Sciences, Inner Mongolia University, Hohhot, 010110, Inner Mongolia, China
| | - Shuyu Bai
- School of Life Sciences, Inner Mongolia University, Hohhot, 010110, Inner Mongolia, China
| | - Alatangaole Damirin
- School of Life Sciences, Inner Mongolia University, Hohhot, 010110, Inner Mongolia, China.
| |
Collapse
|
4
|
Kim SJ, Lee JH, Park WJ, Kim S. Bioinformatic Exploration for Prognostic Significance of Sphingolipid Metabolism-Related Genes in Invasive Ductal Carcinoma Using the Cancer Genome Atlas Cohort. Int J Gen Med 2021; 14:4423-4434. [PMID: 34413672 PMCID: PMC8370849 DOI: 10.2147/ijgm.s328376] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 07/29/2021] [Indexed: 12/24/2022] Open
Abstract
Introduction Sphingolipid metabolism is a highly controlled process that is involved in regulating bioactive lipid signaling pathways and serves important roles in several cellular processes in breast cancer. Invasive ductal carcinoma (IDC), which is characterized by the malignant proliferation of the ductal epithelium and stromal invasion, is the most common type of breast cancer. Recent advances in genetic research have accelerated the discovery of novel prognostic factors and therapeutic targets for the disease. The aim of the present study was to investigate the expression and prognostic significance of sphingolipid metabolism-related genes in female IDC. Methods The present study used gene expression RNAseq data obtained from The Cancer Genome Atlas breast invasive carcinoma (TCGA BRCA) datasets. Results Sphingolipid metabolism-related genes exhibited dysregulated mRNA expression levels in IDC. The Student's t-test revealed that SMPDL3B, B4GALNT1, LPAR2, and LASS2 were significantly upregulated, while LASS3, LPAR1, B4GALT6, GAL3ST1, HPGD, ST8SIA1, UGT8, and S1PR1 were significantly downregulated in female IDC tissues compared with normal solid tissues. Kaplan-Meier survival analyses revealed that high SMPDL3B mRNA expression levels were associated with good prognosis in female IDC, suggesting that SMPDL3B plays a tumor suppressor role. To the best of our knowledge, the present study was the first to report that dysregulated expressions of SMPDL3B are significantly associated with age, estrogen receptor status, progesterone receptor status, and histological subtype. Conclusion Taken together, our study indicated that SMPDL3B may have a pathophysiological role and serve as a novel prognostic biomarker in IDC.
Collapse
Affiliation(s)
- Su-Jeong Kim
- Department of Biochemistry, College of Medicine, Gachon University, Yeonsu-gu, Incheon, 21999, Republic of Korea
| | - Jae-Ho Lee
- Department of Anatomy, School of Medicine, Keimyung University, Dalseo-gu, Daegu, 42601, Republic of Korea
| | - Woo-Jae Park
- Department of Biochemistry, College of Medicine, Gachon University, Yeonsu-gu, Incheon, 21999, Republic of Korea
| | - Shin Kim
- Department of Immunology, School of Medicine, Keimyung University, Dalseo-gu, Daegu, 42601, Republic of Korea.,Institute of Medical Science, Keimyung University, Dalseo-gu, Daegu, 42601, Republic of Korea.,Institute for Cancer Research, Keimyung University Dongsan Medical Center, Dalseo-gu, Daegu, 42601, Republic of Korea
| |
Collapse
|
5
|
Bang G, Ghil S. BRET analysis reveals interaction between the lysophosphatidic acid receptor LPA2 and the lysophosphatidylinositol receptor GPR55 in live cells. FEBS Lett 2021; 595:1806-1818. [PMID: 33959968 DOI: 10.1002/1873-3468.14102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 04/12/2021] [Accepted: 04/26/2021] [Indexed: 01/04/2023]
Abstract
Lysophosphatidic acid (LPA) and lysophosphatidylinositol bind to the G protein-coupled receptors (GPCRs) LPA and GPR55, respectively. LPA2 , a type 2 LPA receptor, and GPR55 are highly expressed in colon cancer and involved in cancer progression. However, crosstalk between the two receptors and potential effects on cellular physiology are not fully understood. Here, using BRET analysis, we found that LPA2 and GPR55 interact in live cells. In the presence of both receptors, LPA2 and/or GPR55 activation facilitated co-internalization, and activation of GPR55, uncoupled with Gαi , induced reduction of intracellular cAMP. Notably, co-activation of receptors synergistically triggered further decline in the cAMP level, promoted cell proliferation, and increased the expression of cancer progression-related genes, suggesting that physical and functional crosstalk between LPA2 and GRR55 is involved in cancer progression.
Collapse
Affiliation(s)
- Gwantae Bang
- Department of Life Science, Kyonggi University, Suwon, Korea
| | - Sungho Ghil
- Department of Life Science, Kyonggi University, Suwon, Korea
| |
Collapse
|
6
|
Amaral RF, Geraldo LHM, Einicker-Lamas M, E Spohr TCLDS, Mendes F, Lima FRS. Microglial lysophosphatidic acid promotes glioblastoma proliferation and migration via LPA 1 receptor. J Neurochem 2020; 156:499-512. [PMID: 32438456 DOI: 10.1111/jnc.15097] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 04/27/2020] [Accepted: 05/08/2020] [Indexed: 12/12/2022]
Abstract
Glioblastomas (GBMs) are highly aggressive primary brain tumors characterized by cellular heterogeneity, insensitivity to chemotherapy and poor patient survival. Lysophosphatidic acid (LPA) is a lysophospholipid that acts as a bioactive signaling molecule and plays important roles in diverse biological events during development and disease, including several cancer types. Microglial cells, the resident macrophages of the central nervous system, express high levels of Autotaxin (ATX,Enpp2), an enzyme that synthetizes LPA. Our study aimed to investigate the role of LPA on tumor growth and invasion in the context of microglia-GBM interaction. First, through bioinformatics studies, patient data analysis demonstrated that more aggressive GBM expressed higher levels of ENPP2, which was also associated with worse patient prognosis with proneural GBM. Using GBM-microglia co-culture system we then demonstrated that GBM secreted factors were able to increase LPA1 and ATX in microglia, which could be further enhanced by hypoxia. On the other hand, interaction with microglial cells also increased ATX expression in GBM. Furthermore, microglial-induced GBM proliferation and migration could be inhibited by pharmacological inhibition of LPA1 , suggesting that microglial-derived LPA could support tumor growth and invasion. Finally, increased LPA1 expression was observed in GBM comparing with other gliomas and could be also associated with worse patient survival. These results show for the first time a microglia-GBM interaction through the LPA pathway with relevant implications for tumor progression. A better understanding of this interaction can lead to the development of new therapeutic strategies setting LPA as a potential target for GBM treatment.
Collapse
Affiliation(s)
- Rackele F Amaral
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Luiz H M Geraldo
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marcelo Einicker-Lamas
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Tania C L de S E Spohr
- Instituto Estadual do Cérebro Paulo Niemeyer - Secretaria de Estado de Saúde, Rio de Janeiro, Brazil
| | - Fabio Mendes
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Flavia R S Lima
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| |
Collapse
|
7
|
Lysophosphatidic Acid and Autotaxin-associated Effects on the Initiation and Progression of Colorectal Cancer. Cancers (Basel) 2019; 11:cancers11070958. [PMID: 31323936 PMCID: PMC6678549 DOI: 10.3390/cancers11070958] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 07/04/2019] [Accepted: 07/08/2019] [Indexed: 02/07/2023] Open
Abstract
The intestinal epithelium interacts dynamically with the immune system to maintain its barrier function to protect the host, while performing the physiological roles in absorption of nutrients, electrolytes, water and minerals. The importance of lysophosphatidic acid (LPA) and its receptors in the gut has been progressively appreciated. LPA signaling modulates cell proliferation, invasion, adhesion, angiogenesis, and survival that can promote cancer growth and metastasis. These effects are equally important for the maintenance of the epithelial barrier in the gut, which forms the first line of defense against the milieu of potentially pathogenic stimuli. This review focuses on the LPA-mediated signaling that potentially contributes to inflammation and tumor formation in the gastrointestinal tract.
Collapse
|
8
|
Ren Z, Zhang C, Ma L, Zhang X, Shi S, Tang D, Xu J, Hu Y, Wang B, Zhang F, Zhang X, Zheng H. Lysophosphatidic acid induces the migration and invasion of SGC-7901 gastric cancer cells through the LPA2 and Notch signaling pathways. Int J Mol Med 2019; 44:67-78. [PMID: 31115486 PMCID: PMC6559315 DOI: 10.3892/ijmm.2019.4186] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Accepted: 04/16/2019] [Indexed: 12/14/2022] Open
Abstract
Lysophosphatidic acid (LPA), a simple water‑soluble glycerophospholipid with growth factor‑like activity, regulates certain behaviors of multiple cancer types by binding to its receptor, LPA receptor 2 (LPA2). Notch1 is a key mediator in multiple human cancer cell types. The association between LPA2 and Notch1 in gastric cancer cells is not well known. The present study aimed to investigate the function of LPA2 and Notch1 in controlling the migration and invasion activities of SGC‑7901 gastric cancer cells following stimulation with LPA. It was revealed that LPA may stimulate the expression of Notch1 and Hes family bHLH transcription factor 1, and the phosphorylation of protein kinase B which belongs to the Notch pathway. Furthermore, by performing transwell migration and invasion assays, immunofluorescent staining, analyzing the expression of markers for the epithelial‑mesenchymal transition (EMT) and downregulating LPA2 and Notch1 expression, it was verified that LPA2 and Notch1 mediated the metastasis, invasion, EMT and rebuilding of the cytoskeleton of SGC‑7901 cells upon LPA treatment. An immunoprecipitation assay revealed that LPA2 interacted with Notch1 in SGC‑7901 cells. The present study may provide novel ideas and an experimental basis for identifying the factors that affect the functions of SGC‑7901 cells.
Collapse
Affiliation(s)
- Zhiheng Ren
- Department of Pathology, School of Basic Medicine, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Chenli Zhang
- Department of Pathology, School of Basic Medicine, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Linna Ma
- Department of Pathology, School of Basic Medicine, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Xiao Zhang
- Department of Pathology, School of Basic Medicine, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Shuxia Shi
- Clinical Teaching Department of Lanzhou Modern Vocational College, Lanzhou, Gansu 730000, P.R. China
| | - Deng Tang
- Department of Pathology, School of Basic Medicine, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Jinyu Xu
- Department of Pathology, School of Basic Medicine, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Yan Hu
- Department of Pathology, School of Basic Medicine, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Binsheng Wang
- Department of Third General Surgery, The First Hospital of Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Fangfang Zhang
- Department of Pathology, School of Basic Medicine, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Xu Zhang
- Department of Pathology, School of Basic Medicine, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Haixue Zheng
- National Foot and Mouth Diseases Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu 730000, P.R. China
| |
Collapse
|
9
|
Abstract
Stem cells are a rare subpopulation defined by the potential to self-renew and differentiate into specific cell types. A population of stem-like cells has been reported to possess the ability of self-renewal, invasion, metastasis, and engraftment of distant tissues. This unique cell subpopulation has been designated as cancer stem cells (CSC). CSC were first identified in leukemia, and the contributions of CSC to cancer progression have been reported in many different types of cancers. The cancer stem cell hypothesis attempts to explain tumor cell heterogeneity based on the existence of stem cell-like cells within solid tumors. The elimination of CSC is challenging for most human cancer types due to their heightened genetic instability and increased drug resistance. To combat these inherent abilities of CSC, multi-pronged strategies aimed at multiple aspects of CSC biology are increasingly being recognized as essential for a cure. One of the most challenging aspects of cancer biology is overcoming the chemotherapeutic resistance in CSC. Here, we provide an overview of autotaxin (ATX), lysophosphatidic acid (LPA), and their signaling pathways in CSC. Increasing evidence supports the role of ATX and LPA in cancer progression, metastasis, and therapeutic resistance. Several studies have demonstrated the ATX-LPA axis signaling in different cancers. This lipid mediator regulatory system is a novel potential therapeutic target in CSC. In this review, we summarize the evidence linking ATX-LPA signaling to CSC and its impact on cancer progression and metastasis. We also provide evidence for the efficacy of cancer therapy involving the pharmacological inhibition of this signaling pathway.
Collapse
|
10
|
Abstract
Bioactive lipids are essential components of human cells and tissues. As discussed in this review, the cancer lipidome is diverse and malleable, with the ability to promote or inhibit cancer pathogenesis. Targeting lipids within the tumor and surrounding microenvironment may be a novel therapeutic approach for treating cancer patients. Additionally, the emergence of a novel super-family of lipid mediators termed specialized pro-resolving mediators (SPMs) has revealed a new role for bioactive lipid mediators in the resolution of inflammation in cancer biology. The role of SPMs in cancer holds great promise in our understanding of cancer pathogenesis and can ultimately be used in future cancer diagnostics and therapy.
Collapse
Affiliation(s)
- Megan L Sulciner
- Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| | - Allison Gartung
- Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Molly M Gilligan
- Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Charles N Serhan
- Department of Anesthesiology, Center for Experimental Therapeutics and Reperfusion Injury, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Dipak Panigrahy
- Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| |
Collapse
|
11
|
Qi W, Sun L, Liu N, Zhao S, Lv J, Qiu W. Tetraspanin family identified as the central genes detected in gastric cancer using bioinformatics analysis. Mol Med Rep 2018; 18:3599-3610. [PMID: 30106120 PMCID: PMC6131613 DOI: 10.3892/mmr.2018.9360] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 04/26/2018] [Indexed: 12/30/2022] Open
Abstract
Gastric cancer has become a serious disease in the past decade. It has the second highest mortality rate among the four most common cancer types, leading to ~700,000 mortalities annually. Previous studies have attempted to elucidate the underlying biological mechanisms of gastric cancer. The present study aimed to obtain useful biomarkers and to improve the understanding of gastric cancer mechanisms at the genetic level. The present study used bioinformatics analysis to identify 1,829 differentially expressed genes (DEGs) which were obtained from the GSE54129 dataset. Using protein‑protein interaction information from the Search Tool for the Retrieval of Interacting Genes database, disease modules were constructed for gastric cancer using Cytoscape software. In the Gene Ontology analysis of biology processes, upregulated genes were significantly enriched in 'extracellular matrix organization', 'cell adhesion' and 'inflammatory response', whereas downregulated DEGs were significantly enriched in 'xenobiotic metabolic process', 'oxidation‑reduction process' and 'steroid metabolic process'. During Kyoto Encyclopedia of Genes and Genomes analysis, upregulated DEGs were significantly enriched in 'extracellular matrix‑receptor interaction', 'focal adhesion' and 'PI3K‑Akt signaling pathway', whereas the downregulated DEGs were significantly enriched in 'chemical carcinogenesis', 'metabolism of xenobiotics by cytochrome P450' and 'peroxisome'. The present study additionally identified 10 hub genes from the DEGs: Tumor protein p53 (TP53), C‑X‑C motif chemokine ligand 8 (CXCL8), tetraspanin 4 (TSPAN4), lysophosphatidic acid receptor 2 (LPAR2), adenylate cyclase 3 (ADCY3), phosphoinositide‑3‑kinase regulatory subunit 1 (PIK3R1), neuromedin U (NMU), C‑X‑C motif chemokine ligand (CXCL12), fos proto‑oncogene, AP‑1 transcription factor subunit (FOS) and sphingosine‑1‑phosphate receptor 1 (S1PR1), which have high degrees with other DEGs. The survival analysis revealed that the high expression of ADCY3, LPAR2, S1PR1, TP53 and TSPAN4 was associated with a lower survival rate, whereas high expression of CXCL8, FOS, NMU and PIK3R1 was associated with a higher survival rate. No significant association was identified between CXCL12 and survival rate. Additionally, TSPAN1 and TSPAN8 appeared in the top 100 DEGs. Finally, it was observed that 4 hub genes were highly expressed in gastric cancer tissue compared with para‑carcinoma tissue in the 12 patients; the increased TSPAN4 was significant (>5‑fold). Tetraspanin family genes may be novel biomarkers of gastric cancer. The findings of the present study may improve the understanding of the molecular mechanisms underlying the development of gastric cancer.
Collapse
Affiliation(s)
- Weiwei Qi
- Department of Oncology and Chemotherapy, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266031, P.R. China
| | - Libin Sun
- Department of Oncology and Chemotherapy, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266031, P.R. China
| | - Ning Liu
- Department of Oncology and Chemotherapy, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266031, P.R. China
| | - Shufen Zhao
- Department of Oncology and Chemotherapy, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266031, P.R. China
| | - Jing Lv
- Department of Oncology and Chemotherapy, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266031, P.R. China
| | - Wensheng Qiu
- Department of Tumor Combined Therapy, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266031, P.R. China
| |
Collapse
|
12
|
Li N, Yan YL, Fu S, Li RJ, Zhao PF, Xu XY, Yang JP, Damirin A. Lysophosphatidic acid enhances human umbilical cord mesenchymal stem cell viability without differentiation via LPA receptor mediating manner. Apoptosis 2018; 22:1296-1309. [PMID: 28766061 PMCID: PMC5630659 DOI: 10.1007/s10495-017-1399-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Human umbilical cord mesenchymal stem cells (hUC-MSCs) are potential stromal cells which are regarded as the most feasible stem cell group in cell therapy. The maintenance of cell survival without differentiation is important in cell transplantation and stem cell therapy. However, negative factors exist in cell transplantation. Lysophosphatidic acid (LPA) is a non-antigenic small molecule phospholipid which induced several fundamental cellular responses, such as cell proliferation, apoptosis and migration. In this study we aimed to explore the effects of LPA on the survival and differentiation of MSCs and its availability in cell therapy. We found that LPA stimulated hUC-MSC proliferation and protected hUC-MSCs from lipopolysaccharide (LPS) induced apoptosis. We also observed that CD29, CD44, CD73, CD90 and CD105 were expressed, whereas CD34 and CD45 were not expressed in hUC-MSCs, and these makers have no change in LPA containing medium, which indicated that LPA accelerated the survival of hUC-MSCs in an undifferentiating status. We also demonstrated that higher expressed LPAR1 involved in LPA stimulated cell survival action. LPA stimulated cell proliferation was associated with LPAR1 mediated Gi/o-proteins/ERK1/2 pathway. On the other hand, LPA protected hUC-MSCs from LPS-induced apoptosis through suppressing caspase-3 activation by LPAR1 coupled with a G protein, but not Gi/o or Gq/11 in hUC-MSC. Collectively, this study demonstrated that LPA increased the proliferation and survival of hUC-MSCs without differentiation through LPAR1 mediated manner. Our findings provide that LPA as a anti-apoptotic agent having potential application prospect in cell transplantation and stem cell therapy.
Collapse
Affiliation(s)
- Narengerile Li
- Department of Biology, College of Life Sciences, Inner Mongolia University, Hohhot, 010021, Inner Mongolia, China
- Department of Respiratory and Critical Medicine, The Third Affiliated Hospital, Inner Mongolia Medical University, Baotou, 014010, Inner Mongolia, China
| | - Ya-Li Yan
- Department of Biology, College of Life Sciences, Inner Mongolia University, Hohhot, 010021, Inner Mongolia, China
| | - Sachaofu Fu
- Department of Biology, College of Life Sciences, Inner Mongolia University, Hohhot, 010021, Inner Mongolia, China
| | - Rui-Juan Li
- Department of Biology, College of Life Sciences, Inner Mongolia University, Hohhot, 010021, Inner Mongolia, China
| | - Peng-Fei Zhao
- Department of Biology, College of Life Sciences, Inner Mongolia University, Hohhot, 010021, Inner Mongolia, China
| | - Xi-Yuan Xu
- Department of Respiratory and Critical Medicine, The Third Affiliated Hospital, Inner Mongolia Medical University, Baotou, 014010, Inner Mongolia, China
| | - Jing-Ping Yang
- Department of Respiratory and Critical Medicine, The Third Affiliated Hospital, Inner Mongolia Medical University, Baotou, 014010, Inner Mongolia, China.
| | - Alatangaole Damirin
- Department of Biology, College of Life Sciences, Inner Mongolia University, Hohhot, 010021, Inner Mongolia, China.
| |
Collapse
|
13
|
Zeng R, Li B, Huang J, Zhong M, Li L, Duan C, Zeng S, Huang J, Liu W, Lu J, Tang Y, Zhou L, Liu Y, Li J, He Z, Wang Q, Dai Y. Lysophosphatidic Acid is a Biomarker for Peritoneal Carcinomatosis of Gastric Cancer and Correlates with Poor Prognosis. Genet Test Mol Biomarkers 2017; 21:641-648. [PMID: 28910191 DOI: 10.1089/gtmb.2017.0060] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Affiliation(s)
- Ruolan Zeng
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Bin Li
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Junhui Huang
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Meizuo Zhong
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Li Li
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Chaojun Duan
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Shan Zeng
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Jin Huang
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Wei Liu
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Jingchen Lu
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Youhong Tang
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Lingming Zhou
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Yiping Liu
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Jianhuang Li
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Zhengxi He
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Quan Wang
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Youyi Dai
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| |
Collapse
|
14
|
Quan M, Cui JJ, Feng X, Huang Q. The critical role and potential target of the autotaxin/lysophosphatidate axis in pancreatic cancer. Tumour Biol 2017; 39:1010428317694544. [PMID: 28347252 DOI: 10.1177/1010428317694544] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Autotaxin, an ecto-lysophospholipase D encoded by the human ENNP2 gene, is expressed in multiple tissues, and participates in numerous critical physiologic and pathologic processes including inflammation, pain, obesity, embryo development, and cancer via the generation of the bioactive lipid lysophosphatidate. Overwhelming evidences indicate that the autotaxin/lysophosphatidate signaling axis serves key roles in the numerous processes central to tumorigenesis and progression, including proliferation, survival, migration, invasion, metastasis, cancer stem cell, tumor microenvironment, and treatment resistance by interacting with a series of at least six G-protein-coupled receptors (LPAR1-6). This review provides an overview of the autotaxin/lysophosphatidate axis and collates current knowledge regarding its specific role in pancreatic cancer. With a deeper understanding of the critical role of the autotaxin/lysophosphatidate axis in pancreatic cancer, targeting autotaxin or lysophosphatidate receptor may be a potential and promising strategy for cancer therapy.
Collapse
Affiliation(s)
- Ming Quan
- Cancer Center, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Jiu-Jie Cui
- Cancer Center, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Xiao Feng
- Cancer Center, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Qian Huang
- Cancer Center, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R. China
| |
Collapse
|
15
|
G-Protein-Coupled Lysophosphatidic Acid Receptors and Their Regulation of AKT Signaling. Int J Mol Sci 2016; 17:215. [PMID: 26861299 PMCID: PMC4783947 DOI: 10.3390/ijms17020215] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Revised: 01/29/2016] [Accepted: 02/01/2016] [Indexed: 12/13/2022] Open
Abstract
A hallmark of G-protein-coupled receptors (GPCRs) is their ability to recognize and respond to chemically diverse ligands. Lysophospholipids constitute a relatively recent addition to these ligands and carry out their biological functions by activating G-proteins coupled to a large family of cell-surface receptors. This review aims to highlight salient features of cell signaling by one class of these receptors, known as lysophosphatidic acid (LPA) receptors, in the context of phosphatidylinositol 3-kinase (PI3K)-AKT pathway activation. LPA moieties efficiently activate AKT phosphorylation and activation in a multitude of cell types. The interplay between LPA, its receptors, the associated Gαi/o subunits, PI3K and AKT contributes to the regulation of cell survival, migration, proliferation and confers chemotherapy-resistance in certain cancers. However, detailed information on the regulation of PI3K-AKT signals induced by LPA receptors is missing from the literature. Here, some urgent issues for investigation are highlighted.
Collapse
|
16
|
Ryu JM, Han HJ. Autotaxin-LPA axis regulates hMSC migration by adherent junction disruption and cytoskeletal rearrangement via LPAR1/3-dependent PKC/GSK3β/β-catenin and PKC/Rho GTPase pathways. Stem Cells 2015; 33:819-32. [PMID: 25376707 DOI: 10.1002/stem.1882] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 09/30/2014] [Accepted: 10/15/2014] [Indexed: 12/29/2022]
Abstract
Bioactive molecules and stem cell-based regenerative engineering is emerging a promising approach for regenerating tissues. Autotaxin (ATX) is a key enzyme that regulates lysophosphatidic acid (LPA) levels in biological fluids, which exerts a wide range of cellular functions. However, the biological role of ATX in human umbilical cord blood-derived mesenchymal stem cells (hMSCs) migration remains to be fully elucidated. In this study, we observed that hMSCs, which were stimulated with LPA, accelerated wound healing, and LPA increased the migration of hMSCs into a wound site in a mouse skin wound healing model. In an experiment to investigate the effect of LPA on hMSC migration, ATX and LPA increased hMSC migration in a dose-dependent manner, and LPA receptor 1/3 siRNA transfections inhibited the ATX-induced cell migration. Furthermore, LPA increased Ca(2+) influx and PKC phosphorylation, which were blocked by Gαi and Gαq knockdown as well as by Ptx pretreatment. LPA increased GSK3β phosphorylation and β-catenin activation. LPA induced the cytosol to nuclear translocation of β-catenin, which was inhibited by PKC inhibitors. LPA stimulated the binding of β-catenin on the E-box located in the promoter of the CDH-1 gene and decreased CDH-1 promoter activity. In addition, the ATX and LPA-induced increase in hMSC migration was blocked by β-catenin siRNA transfection. LPA-induced PKC phosphorylation is also involved in Rac1 and CDC42 activation, and Rac1 and CDC42 knockdown abolished LPA-induced F-actin reorganization. In conclusion, ATX/LPA stimulates the migration of hMSCs through LPAR1/3-dependent E-cadherin reduction and cytoskeletal rearrangement via PKC/GSK3β/β-catenin and PKC/Rho GTPase pathways.
Collapse
Affiliation(s)
- Jung Min Ryu
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea; BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, South Korea
| | | |
Collapse
|
17
|
Yun CC, Kumar A. Diverse roles of LPA signaling in the intestinal epithelium. Exp Cell Res 2014; 333:201-207. [PMID: 25433271 DOI: 10.1016/j.yexcr.2014.11.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 11/05/2014] [Indexed: 12/19/2022]
Abstract
Lysophosphatidic acid (LPA) is a lipid mediator that modulates a wide variety of cellular functions. Elevated LPA signaling has been reported in patients with colorectal cancer or inflammatory bowel diseases, and the tumorigenic role of LPA has been demonstrated in experimental models of colon cancer. However, emerging evidence indicates the importance of LPA signaling in epithelial wound healing and regulation of intestinal electrolyte transport. Here, we briefly review current knowledge of the biological roles of LPA signaling in the intestinal tract.
Collapse
Affiliation(s)
- C Chris Yun
- Division of Digestive Diseases, Department of Medicine, Emory University School of Medicine, Atlanta, GA, USA; Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA, USA; Atlanta VA Medical Center, Decatur, GA, USA.
| | - Ajay Kumar
- Division of Digestive Diseases, Department of Medicine, Emory University School of Medicine, Atlanta, GA, USA
| |
Collapse
|