• Title, Summary, Keyword: cell migration

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Aquaporin 8 Involvement in Human Cervical Cancer SiHa Migration via the EGFR-Erk1/2 Pathway

  • Shi, Yong-Hua;Tuokan, Talaf;Lin, Chen;Chang, Heng
    • Asian Pacific Journal of Cancer Prevention
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    • v.15 no.15
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    • pp.6391-6395
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    • 2014
  • Overexpression of aquaporins (AQPs) has been reported in several human cancers. Epidermal growth factor receptor (EGFR)-extracellular signal-regulated kinases 1/2 (Erk1/2) are associated with tumorigenesis and cancer progression and may upregulate AQP expression. In this study, we demonstrated that EGF (epidermal growth factor) induces SiHa cells migration and AQP8 expression. Wound healing results showed that cell migration was increased by 2.79-1.50-fold at 24h and 48h after EGF treatment. AQP8 expression was significantly increased (3.33-fold) at 48h after EGF treatment in SiHa cells. An EGFR kinase inhibitor, PD153035, blocked EGF-induced AQP8 expression and cell migration and AQP8 expression was decreased from 1.59-fold (EGF-treated) to 0.43-fold (PD153035-treated) in SiHa. Furthermore, the MEK (MAPK (mitogen-activated protein kinase)/Erk (extracellular signal regulated kinase)/Erk inhibitor U0126 also inhibited EGF-induced AQP8 expression and cell migration. AQP8 expression was decreased from 1.21-fold (EGF-treated) to 0.43-fold (U0126-treated). Immunofluorescence microscopy further confirmed the results. Collectively, our findings show that EGF induces AQP8 expression and cell migration in human cervical cancer SiHa cells via the EGFR/Erk1/2 signal transduction pathway.

Dual TORCs driven and B56 orchestrated signaling network guides eukaryotic cell migration

  • Kim, Lou W.
    • BMB Reports
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    • v.50 no.9
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    • pp.437-444
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    • 2017
  • Different types of eukaryotic cells may adopt seemingly distinct modes of directional cell migration. However, several core aspects are regarded common whether the movement is either ameoboidal or mesenchymal. The region of cells facing the attractive signal is often termed leading edge where lamellipodial structures dominates and the other end of the cell called rear end is often mediating cytoskeletal F-actin contraction involving Myosin-II. Dynamic remodeling of cell-to-matrix adhesion involving integrin is also evident in many types of migrating cells. All these three aspects of cell migration are significantly affected by signaling networks of TorC2, TorC1, and PP2A/B56. Here we review the current views of the mechanistic understanding of these regulatory signaling networks and how these networks affect eukaryotic cell migration.

Development of a Three-Dimensional Chemotaxis Model for a Single Bacterium (3 차원 모델을 통한 단일 박테리아의 주화성 연구)

  • Song, Ji-Hwan;Kim, Dong-Choul
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.33 no.1
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    • pp.56-63
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    • 2009
  • Cell migration is one of the essential mechanisms responsible for complex biological processes. Intensive researches have begun to elucidate the mechanisms and search intriguing conditions for efficient control of cell migration. One general mechanism that is widely applicable for cells including Escherichia coli, amoebae and endothelial cell is chemotaxis. The single cell study for bacterial chemotaxis has an advantage over studies with the population of cells in providing a clearer observation of cell migration, which leads to more accurate assessments of chemotaxis. In this paper, we propose a three-dimensional model considering a single bacterium to study its chemotaxis. The semi-implicit Fourier spectral method is applied for high efficiency and numerical stability. The simulation results reveal rich dynamics of cell migration and provide quantitative assessments of bacterial chemotaxis with various chemoattractant gradient fields.

Effect of Fibroblast Growth Factor-2 on Migration and Proteinases Secretion of Human Umbilical Vein Endothelial Cells

  • Oh, In-Suk;Kim, Hwan-Gyu
    • Journal of Microbiology and Biotechnology
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    • v.14 no.2
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    • pp.379-384
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    • 2004
  • Fibroblast growth factor-2 (FGF-2) is known to modulate numerous cellular functions in various cell types, including cell proliferation, differentiation, survival, adhesion, migration, and motility, and also in processes such as wound healing, angiogenesis, and vasculogenesis. FGF-2 regulates the expression of several molecules thought to mediate critical steps during angiogenesis. This study examines the mechanisms underlying FGF-2-induced cell migration, using human umbilical vein endothelial cells (HUVECs). FGF-2 induced the nondirectional and directional migration of endothelial cells, which are inhibited by MMPs and plasmin inhibitors, and induced the secretion of matrix metalloproteinase-3 (MMP3) and MMP-9, but not MMP-l and MMP-2. FGF-2 also induced the secretion of the tissue inhibitor of metalloproteinase-l (TIMP-I), but not of TIMP- 2. Also, the pan-PKC inhibitor inhibited FGF-2-induced MMP-9 secretion. It is, therefore, suggested that FGF-2 induces the migration of cultured endothelial cells by means of increased MMPs and plasmin secretion. Furthermore, FGF-2 may increase MMP-9 secretion by activating the PKC pathway.

Cell proliferation and migration mechanism of caffeoylserotonin and serotonin via serotonin 2B receptor in human keratinocyte HaCaT cells

  • Kim, Hye-Eun;Cho, Hyejoung;Ishihara, Atsushi;Kim, Byungkuk;Kim, Okjoon
    • BMB Reports
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    • v.51 no.4
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    • pp.188-193
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    • 2018
  • Caffeoylserotonin (CaS), one derivative of serotonin (5-HT), is a secondary metabolite produced in pepper fruits with strong antioxidant activities. In this study, we investigated the effect of CaS on proliferation and migration of human keratinocyte HaCaT cells compared to that of 5-HT. CaS enhanced keratinocyte proliferation even under serum deficient condition. This effect of CaS was mediated by serotonin 2B receptor (5-HT2BR) related to the cell proliferation effect of 5-HT. We also confirmed that both CaS and 5-HT induced G1 progression via 5-HT2BR/ERK pathway in HaCaT cells. However, Akt pathway was additionally involved in upregulated expression levels of cyclin D1 and cyclin E induced by CaS by activating 5-HT2BR. Moreover, CaS and 5-HT induced cell migration in HaCaT cells via 5-HT2BR. However, 5-HT regulated cell migration only through ERK/AP-1/MMP9 pathway while additional Akt/NF-${\kappa}B$/MMP9 pathway was involved in the cell migration effect of CaS. These results suggest that CaS can enhance keratinocyte proliferation and migration. It might have potential as a reagent beneficial for wound closing and cell regeneration.

Auraptene Inhibits Migration and Invasion of Cervical and Ovarian Cancer Cells by Repression of Matrix Metalloproteinasas 2 and 9 Activity

  • Jamialahmadi, Khadijeh;Salari, Sofia;Alamolhodaei, Nafiseh Sadat;Avan, Amir;Gholami, Leila;Karimi, Gholamreza
    • Journal of Pharmacopuncture
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    • v.21 no.3
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    • pp.177-184
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    • 2018
  • Objectives: Auraptene, a natural citrus coumarin, found in plants of Rutaceae and Apiaceae families. In this study, we investigated the effects of auraptene on tumor migration, invasion and matrix metalloproteinase (MMP)-2 and -9 enzymes activity. Methods: The effects of auraptene on the viability of A2780 and Hela cell lines was evaluated by MTT assay. Wound healing migration assay and Boyden chamber assay were determined the effect of auraptene on migration and cell invasion, respectively. MMP-2 and MMP-9 activities were analyzed by gelatin zymography assay. Results: Auraptene reduced A2780 cell viability. The results showed that auraptene inhibited in vitro migration and invasion of both cells. Furthermore, cell invasion ability suppressed at $100{\mu}M$ auraptene in Hela cells and at 25, $50{\mu}M$ in A2780 cell line. Gelatin zymography showed that for Hela cell line, auraptene suppressed MMP-2 enzymatic activity in all concentrations and for MMP-9 at a concentration between 12.5 to $100{\mu}M$ in A2780 cell line. Conclusion: Auraptene inhibited migration and invasion of human cervical and ovarian cancer cells in vitro by possibly inhibitory effects on MMP-2 and MMP-9 activity.

Caveolin-1 inhibits membrane-type 1 matrix metalloproteinase activity

  • Kim, Hye-Nan;Chung, Hye-Shin
    • BMB Reports
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    • v.41 no.12
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    • pp.858-862
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    • 2008
  • Membrane-type 1 matrix metalloproteinase (MT1-MMP) is a zinc-dependent proteinase found in cholesterol-rich lipid rafts on the plasma membrane. MT1-MMP hydrolyzes extracellular matrix (ECM) proteins, activates pro-matrix metalloproteinase-2 (proMMP-2) and plays an important role in ECM remodeling, cancer cell migration and metastasis. The role of caveolin-1, an integral protein of caveolae, in the activation of MT1-MMP remains largely unknown. Here, we show that the expression of caveolin-1 attenuates the activation of proMMP-2, reduces proteolytic cleavage of ECM and inhibits cell migration. We utilized the cytoplasmic tail domain deletion (${\Delta}CT$) or the E240A mutant of MT1-MMP. Co-expression of caveolin-1 with the wild-type or the ${\Delta}CT$ MT1-MMP decreased the proMMP-2 activation and inhibited collagen degradation and cell migration. Caveolin-1 had no effect on the catalytically inert E240A MT1-MMP. Our findings suggest that caveolin-1 is essential in the down-regulation of MT1-MMP activity by promoting internalization from the cell surface.

Identification of boundary migration during the wound healing through the visualization of cell migrations (세포 운동 가시화를 통한 상처 치유 과정 내 경계 이동의 규명)

  • Jeong, Hyuntae;Lee, Jaesung;Shin, Jennifer Hyunjong
    • Journal of the Korean Society of Visualization
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    • v.18 no.2
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    • pp.10-17
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    • 2020
  • The curvature of wound boundaries has been identified as a key modulator that determines a type of force responsible for cell migration. While several studies report how certain curvatures of the boundary correlate with the rate at which the wound closes, it remains unclear how these curvatures are spatiotemporally formed to regulate the healing process. We investigated the dynamic changes in the boundary curvatures by visualizing cell migration patterns. Locally, cells at the convex boundary continuously move forward with transmitting kinetic responses behind to the cells away from the boundary, and cells at the concave boundary exhibit dramatic contracting motion, like a purse-string, when they accumulate enough negative curvatures to gain the thrust toward the void. Globally, the dynamics of boundary geometries are controlled by the diffusive flow of cells driven by the density gradient between the wound area and the cell layer.

Characterization of the KG1a Cell Line for Use in a Cell Migration Based Screening Assay

  • Bernhard O. Palsson;Karl francis;Lee, Gyun-Min
    • Biotechnology and Bioprocess Engineering:BBE
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    • v.7 no.3
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    • pp.178-184
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    • 2002
  • High-throughput screening has become a popular method used to identify new “leads”for potentially therapeutic compounds. Further screening of these lead compounds is typically done with secondary assays which may utilize living, functioning cells as screening tools. A problem (or benefit) with these cell-based assays is that living cells are very sensitive to their environment. We have been interested in the process of stem cell migration and how it relates to the cellular therapy of bone marrow transplantation. In this study we describe a secondary, cell-based assay for screening the effects of various in-vitro conditions on Immature Hematopoietic Cell (IHC) migration. Our results have revealed many subtle factors, such as the cell's adhesive characteristics, or the effect of a culture's growth phase, that need to be accounted for in a screening protocol. Finally, we show that exponentially glowing KG1a cells (a human IHC cell line) were 10 times more motile than those in the lag or stationary phases. These data strongly suggest that KG1a cells secrete a chemokinetic factor during the exponential growth phase of a culture.

New Insights into 4-Amino-2-tri-fluoromethyl-phenyl Ester Inhibition of Cell Growth and Migration in the A549 Lung Adenocarcinoma Cell Line

  • Wang, Hao;Gui, Shu-Yu;Chen, Fei-Hu;Zhou, Qing;Wang, Yuan
    • Asian Pacific Journal of Cancer Prevention
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    • v.14 no.12
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    • pp.7265-7270
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    • 2013
  • Objective: The present study was designed to investigate the probable mechanisms of synthetic retinoid 4-amino-2-tri-fluoromethyl-phenyl ester (ATPR) inhibition of the proliferation and migration of A549 human lung carcinoma cells. Materials and Methods: After the A549 cells were treated with different concentrations of ATPR or all-trans retinoic acid (ATRA) for 72 h, scratch-wound assays were performed to assess migration. Immunofluorescence was used to determine the distribution of CAV1 and $RXR{\alpha}$, while expression of CAV1, MLCK, MLC, P38, and phosphorylation of MLC and P38 were detected by Western blotting. Results: ATPR could block the migration of A549 cells. The relative migration rate of ML-7 group had significantly decreased compared with control group. In addition, ATPR decreased the expression of a migration related proteins, MLCK, and phosphorylation of MLC and P38. ATPR could also influence the expression of RARs or RXRs. At the same time, CAV1 accumulated at cell membranes, and $RXR{\alpha}$ relocated to the nucleus after ATPR treatment. Conclusions: Caveolae may be implicate in the transport of ATPR to the nucleus. Change in the expression and distribution of $RXR{\alpha}$ may be implicated in ATPR inhibition of A549 cell proliferation. The mechanisms of ATPR reduction in A549 cell migration may be associated with expression of MLCK and phosphorylation of MLC and P38.