共查询到20条相似文献,搜索用时 31 毫秒
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Ku BM Ryu HW Lee YK Ryu J Jeong JY Choi J Cho HJ Park KH Kang SS 《Biochemical and biophysical research communications》2010,402(3):525-530
Chalcones are precursors of flavonoids and have been shown to have anti-cancer activity. Here, we identify the synthetic chalcone derivative 4′-acetoamido-4-hydroxychalcone (AHC) as a potential therapeutic agent for the treatment of glioma. Treatment with AHC reduced glioma cell invasion, migration, and colony formation in a concentration-dependent manner. In addition, AHC inhibited vascular endothelial growth factor-induced migration, invasion, and tube formation in HUVECs. To determine the mechanism underlying the inhibitory effect of AHC on glioma cell invasion and migration, we investigated the effect of AHC on the gene expression change and found that AHC affects actin dynamics in U87MG glioma cells. In actin cytoskeleton regulating system, AHC increased tropomyosin expression and stress fiber formation, probably through activation of PKA. Suppression of tropomyosin expression by siRNA or treatment with the PKA inhibitor H89 reduced the inhibitory effects of AHC on glioma cell invasion and migration. In vivo experiments also showed that AHC inhibited tumor growth in a xenograft mouse tumor model. Together, these data suggest that the synthetic chalcone derivative AHC has potent anti-cancer activity through inhibition of glioma proliferation, invasion, and angiogenesis and is therefore a potential chemotherapeutic candidate for the treatment of glioma. 相似文献
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Class-3 semaphorins are secreted axon guidance factors. Some of these semaphorins have recently been characterized as suppressors of tumor progression. To determine if class-3 semaphorins can be used to inhibit the development of glioblastoma-multiforme tumors, we expressed recombinant sema-3A, 3B, 3D, 3E, 3F or 3G in U87MG glioblastoma cells. Sema3A and sema3B expressing cells contracted and changed shape persistently while cells expressing other semaphorins did not. Sema3A and sema3F differed from other semaphorins including sema3B as they also inhibited the proliferation of the cells and the formation of soft agar colonies. With the exception of sema3G and sema3B, expression of these semaphorins in U87MG cells inhibited significantly tumor development from subcutaneously implanted cells. Strong inhibition of tumor development was also observed following implantation of U87MG cells expressing each of the class-3 semaphorins in the cortex of mouse brains. Sema3D and sema3E displayed the strongest inhibitory effects and their expression in U373MG or in U87MG glioblastoma cells implanted in the brains of mice prolonged the survival of the mice by more then two folds. Furthermore, most of the mice that died prior to the end of the experiment did not develop detectable tumors and many of the mice survived to the end of the experiment. Most of the semaphorins that we have used here with the exception of sema3D were characterized previously as inhibitors of angiogenesis. Our results indicate that sema3D also functions as an inhibitor of angiogenesis and suggest that the anti-tumorigenic effects are due primarily to inhibition of tumor angiogenesis. These results indicate that class-3 semaphorins such as sema3D and sema3E could perhaps be used to treat glioblastoma patients. 相似文献
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Pal Gö?z Monika Gö?z Stanley Hoffman 《Biochemical and biophysical research communications》2009,380(1):33-685
Modulation of angiogenesis is a promising approach for treating a wide variety of human diseases including ischemic heart disease and cancer. In this study, we show that ADAM-17 is an important regulator of several key steps during angiogenesis. Knocking down ADAM-17 expression using lentivirus-delivered siRNA in HUVECs inhibited cell proliferation and the ability of cells to form close contact in two-dimensional cultures. Similarly, ADAM-17 depletion inhibited the ability of HUVECs to form capillary-like networks on top of three-dimensional Matrigel as well as in co-culture with fibroblasts within a three-dimensional scaffold. In mechanistic studies, both baseline and VEGF-induced MMP-2 activation and Matrigel invasion were inhibited by ADAM-17 depletion. Based on our findings we propose that ADAM-17 is part of a novel pro-angiogenic pathway leading to MMP-2 activation and vessel formation. 相似文献
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BackgroundA-kinase interacting protein 1 (AKIP1) is recently implicated in the pathogenesis of several solid tumors, while its role in glioblastoma multiforme (GBM) is largely unknown. Therefore, the current study aimed to investigate the effect of AKIP1 on GBM cell malignant behaviors, stemness, and its underlying molecular mechanisms.MethodsU-87 MG and A172 cells were transfected with control or AKIP1 overexpression plasmid; control or AKIP1 siRNA plasmid. Then cell proliferation, apoptosis, invasion, CD133+ cell proportion, and sphere formation assays were performed. Furthermore, RNA-Seq was performed in U-87 MG cells. Besides, AKIP1 expression was detected in 25 GBM and 25 low-grade glioma (LGG) tumor samples.ResultsAKIP1 was increased in several GBM cell lines compared to the control cell line. After transfections, it was found that AKIP1 overexpression increased cell invasion, CD133+ cell proportion, and sphere formation ability while less affecting cell proliferation or cell apoptosis in U-87 MG and A172 cells. Moreover, AKIP1 siRNA achieved the opposite effect in these cells, except that it inhibited cell proliferation but induced cell apoptosis to some extent. Subsequent RNA-Seq assay showed several critical carcinogenetic pathways, such as PI3K/AKT, Notch, EGFR tyrosine kinase inhibitor resistance, Ras, ErbB, mTOR pathways, etc. were potentially related to the function of AKIP1 in U-87 MG cells. Clinically, AKIP1 expression was higher in GBM tissues than in LGG tissues, which was also correlated with the poor prognosis of GBM to some degree.ConclusionsAKIP1 regulates the malignant behaviors and stemness of GBM via regulating multiple carcinogenetic pathways. 相似文献
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Xiao Zhong Hong-qi Chen Xiu-ling Yang Qing Wang Wenliang Chen Chunfu Li 《Biochemical and biophysical research communications》2019,508(4):1279-1285
The aim of this study was to investigate the function of Cystic fibrosis transmembrane conductance regulator (CFTR) in human glioblastoma (GBM) cells. Data dining results of the Human Protein Atlas showed that low CFTR expression was associated with poor prognosis for GBM patients. We found that CFTR protein expression was lower in U87 and U251 GBM cells than that in normal humane astrocyte cells. CFTR activation significantly reduced GBM cell proliferation. In addition, CFTR activation significantly abrogated migration and invasion of GBM cells. Besides, CFTR activator Forskolin treatment markedly reduced MMP-2 protein expression. These effects of CFTR activation were significantly inhibited by CFTR inhibitor CFTRinh-172 pretreatment. Our findings suggested that JAK2/STAT3 signaling was involved in the anti-glioblastoma effects of CFTR activation. Moreover, CFTR overexpression in combination with Forskolin induced a synergistic anti-proliferative response in U87?cells. Overall, our findings demonstrated that CFTR activation suppressed GBM cell proliferation, migration and invasion likely through the inhibition of JAK2/STAT3 signaling. 相似文献
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Background
The extraordinary invasive capability is a major cause of treatment failure and tumor recurrence in glioma, however, the molecular and cellular mechanisms governing glioma invasion remain poorly understood. Evidence in other cell systems has implicated the regulatory role of microRNA in cell motility and invasion, which promotes us to investigate the biological functions of miR-124 in glioma in this regard.Results
We have found that miR-124 is dramatically downregulated in clinical specimen of glioma and is negatively correlated with the tumor pathological grading in the current study. The cells transfected by miR-124 expression vector have demonstrated retarded cell mobility. Using a bioinformatics analysis approach, rho-associated coiled-coil containing protein kinase 1 (ROCK1), a well-known cell mobility-related gene, has been identified as the target of miR-124. A dual-luciferase reporter assay was used to confirm that miR-124 targeted directly the 3′UTR of ROCK1 gene and repressed the ROCK1 expression in U87MG human glioma cell line. Furthermore, experiments have shown that the decreased cell mobility was due to the actin cytoskeleton rearrangements and the reduced cell surface ruffle in U87MG glioma cells. These results are similar to the cellular responses of U87MG glioma cells to the treatment of Y-27632, an inhibitor of ROCK protein. Moreover, a constitutively active ROCK1 in miR-124 over-expressed glioma cells reversed the effects of miR-124. Our results revealed a novel mechanism that miR-124 inhibits glioma cells migration and invasion via ROCK1 downregulation.Conclusions
These results suggest that miR-124 may function as anti-migration and anti-invasion influence in glioma and provides a potential approach for developing miR-124-based therapeutic strategies for malignant glioma therapy. 相似文献10.
Glioblastoma multiforme (GBM) is the most aggressive and common type of human primary brain tumor. Glioblastoma stem-like cells (GSCs) have been proposed to contribute to tumor initiation, progression, recurrence, and therapeutic resistance of GBM. Therefore, targeting GSCs could be a promising strategy to treat this refractory cancer. Calmodulin (CaM), a major regulator of Ca2+-dependent signaling, controls various cellular functions via interaction with multiple target proteins. Here, we investigated the anticancer effect of hydrazinobenzoylcurcumin (HBC), a Ca 2+/CaM antagonist, against GSCs derived from U87MG and U373MG cells. HBC significantly inhibited not only the self-renewal capacity, such as cell growth and neurosphere formation but also the metastasis-promoting ability, such as migration and invasion of GSCs. HBC induced apoptosis of GSCs in a caspase-dependent manner. Notably, HBC repressed the phosphorylation of Ca 2+/CaM-dependent protein kinase II (CaMKII), c-Met, and its downstream signal transduction mediators, thereby reducing the expression levels of GSC markers, such as CD133, Nanog, Sox2, and Oct4. In addition, the knockdown of CaMKIIγ remarkably decreased the cancer stem cell-like phenotypes as well as the expression of stemness markers by blocking c-Met signaling pathway in U87MG GSCs. These results suggest that HBC suppresses the stem-like features of GBM cells via downregulation of CaM/CaMKII/c-Met axis and therefore CaMKII may be a novel therapeutic target to eliminate GSCs. 相似文献
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Ming-Fu Chiang Hsin-Hong Chen Chih-Wen Chi Chun-I Sze Ming-Ling Hsu Hui-Ru Shieh Chin-Ping Lin Jo-Ting Tsai Yu-Jen Chen 《Experimental biology and medicine (Maywood, N.J.)》2015,240(3):392-399
WW domain containing oxidoreductase, designated WWOX, FOR or WOX1, is a known pro-apoptotic factor when ectopically expressed in various types of cancer cells, including glioblastoma multiforme (GBM). The activation of sonic hedgehog (Shh) signaling, especially paracrine Shh secretion in response to radiation, is associated with impairing the effective irradiation of cancer cells. Here, we examined the role of Shh signaling and WOX1 overexpression in the radiosensitivity of human GBM cells. Our results showed that ionizing irradiation (IR) increased the cytoplasmic Shh and nuclear Gli-1 content in GBM U373MG and U87MG cells. GBM cells with exogenous Shh treatment exhibited similar results. Pretreatment with Shh peptides protected U373MG and U87MG cells against IR in a dose-dependent manner. Cyclopamine, a Hedgehog/Smoothened (SMO) inhibitor, reversed the protective effect of Shh in U87MG cells. Cyclopamine increased Shh plus IR-induced H2AX, a marker of DNA double-strand breaks, in these cells. To verify the role of Shh signaling in the radiosensitivity of GBM cells, we tested the effect of the Gli family zinc finger 1 (Gli-1) inhibitor zerumbone and found that it could sensitize GBM cells to IR. We next examined the role of WOX1 in radiosensitivity. Overexpression of WOX1 enhanced the radiosensitivity of U87MG (possessing wild type p53 or WTp53) but not U373MG (harboring mutant p53 or MTp53) cells. Pretreatment with Shh peptides protected both WOX1-overexpressed U373MG and U87MG cells against IR and increased the cytoplasmic Shh and nuclear Gli-1 content. Zerumbone enhanced the radiosensitivity of WOX1-overexpressed U373MG and U87MG cells. In conclusion, overexpression of WOX1 preferentially sensitized human GBM cells possessing wild type p53 to radiation therapy. Blocking of Shh signaling may enhance radiosensitivity independently of the expression of p53 and WOX1. The crosstalk between Shh signaling and WOX1 expression in human glioblastoma warrants further investigation. 相似文献
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Qianqian Zheng Shuo Diao Qi Wang Chen Zhu Xun Sun Bo Yin Xinwen Zhang Xin Meng Biao Wang 《Journal of cellular and molecular medicine》2019,23(1):357-369
Glioblastomas (GBMs) are the most common of both benign and malignant primary brain tumours, in which the inflammatory and immunologic abnormalities are involved. Interleukin‐17A (IL‐17A) plays an important role in various inflammatory diseases and cancers. Several recent studies revealed that the expression of IL‐17A was overexpressed in human GBMs tissue. However, the accurate role of IL‐17A in GBMs remains unclear. In this study, we aimed to explore the effect of IL‐17A on cell migration and invasion of GBMs and the mechanism by which the effects occurred. We found that exogenous IL‐17A promoted significantly cell migration and invasion abilities in two GBMs cell lines (U87MG and U251) in a time‐dependent manner. In addition, the protein expressions of PI3K, Akt and MMP‐2/9 were increased in the GBMs cells challenged by IL‐17A. Furthermore, a tight junction protein ZO‐1 was down‐regulated but Twist and Bmi1 were up‐regulated. Treatment with a PI3K inhibitor (LY294002) significantly reduced the abilities of both migration and invasion in U87MG and U251 cells. LY294002 treatment also attenuated the IL‐17A causing increases of protein levels of PI3K, AKT, MMP‐2/9, Twist and the decreases of protein level of ZO‐1 in the U87MG and U251 cells. Taken together, we concluded that IL‐17A promotes the GBM cells migration and invasion via PI3K/AKT signalling pathway. IL‐17A and its related signalling pathways may be potential therapeutic targets for GBM. 相似文献
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Choi HE Yoo MS Choi JH Lee JY Kim JH Kim JH Lee JK Kim GI Park Y Chi YH Paik SH Lee JH Lee KT 《Bioorganic & medicinal chemistry letters》2011,21(21):6236-6241
Anti-angiogenesis is regarded as an effective strategy for cancer treatment, and vascular endothelial growth factor (VEGF) plays a key role in the regulations of angiogenesis and vasculogenesis. In the present study, the authors synthesized five novel nicotinamide derivatives which structurally mimic the receptor tyrosine kinase inhibitor sunitinib and evaluated their anti-angiogenic effects. Transwell migration assays revealed that 2-(1-benzylpiperidin-4-yl) amino-N-(3-chlorophenyl) nicotinamide (BRN-103), among the five derivatives most potently inhibited VEGF-induced human umbilical vein endothelial cells (HUVECs). In addition, BRN-103 dose-dependently inhibited VEGF-induced migration, proliferation, and capillary-like tube formation of HUVECs and vessel sprouting from mouse aortic rings. To understand the molecular mechanisms responsible for these activities, the authors examined the effect of BRN-103 on VEGF signaling pathways in HUVECs. BRN-103 was found to suppress the VEGF-induced phosphorylation of VEGF receptor 2 (VEGR2) and the activations of AKT and eNOS. Taken together, these results suggest that BRN-103 inhibits VEGF-mediated angiogenesis signaling in human endothelial cells. 相似文献
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Han SP Kim JH Han ME Sim HE Kim KS Yoon S Baek SY Kim BS Oh SO 《Cellular and molecular neurobiology》2011,31(3):489-496
Glioblastoma is the most common type of astrocytoma in the brain. Due to its high invasiveness and chemoresistance, patients
with advanced stage of glioblastoma have a poor prognosis. SNAI1, an important regulator of epithelial-mesenchymal transition,
has been associated with metastasis in various carcinoma cells. However, its roles in glioblastoma cells have been poorly
characterized. To examine roles of SNAI1 in glioblastoma cells, we knockdowned SNAI1 expression using siRNA. SNAI1 siRNA increased
the expression level of E-cadherin and decreased that of vimentin. In the water-soluble tetrazolium salt (WST-1) assay, SNAI1
siRNA inhibited the proliferation of U87-MG and GBM05 glioblastoma cells. Moreover, in the Boyden chamber assay and Matrigel
invasion assay, SNAI1 siRNA inhibited serum-induced migration and invasion of glioblastoma cells. These results suggested
that SNAI1 is involved in the proliferation and migration of glioblastoma cells. 相似文献
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Glioblastoma multiforme (GBM) is the most common and most aggressive malignant brain tumor. Despite optimal treatment and evolving standard of care, the median survival of patients diagnosed with GBM is only 12–15 months. In this study, we combined progesterone (PROG) and temozolomide (TMZ), a standard chemotherapeutic agent for human GBM, to test whether PROG enhances the antitumor effects of TMZ and reduces its side effects. Two WHO grade IV human GBM cells lines (U87MG and U118MG) and primary human dermal fibroblasts (HDFs) were repeatedly exposed to PROG and TMZ either alone or in combination for 3 and 6 days. Cell death was measured by MTT reduction assay. PROG and TMZ individually induced tumor cell death in a dose-dependent manner. PROG at high doses produced more cell death than TMZ alone. When combined, PROG enhanced the cell death-inducing effect of TMZ. In HDFs, PROG did not reduce viability even at the same high cytotoxic doses, but TMZ did so in a dose-dependent manner. In combination, PROG reduced TMZ toxicity in HDFs. PROG alone and in combination with TMZ suppressed the EGFR/PI3K/Akt/mTOR signaling pathway and MGMT expression in U87MG cells, thus suppressing cell proliferation. PROG and TMZ individually reduced cell migration in U87MG cells but did so more effectively in combination. PROG enhances the cytotoxic effects of TMZ in GBM cells and reduces its toxic side effects in healthy primary cells. 相似文献
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为了探究二甲双胍对不同胶质母细胞瘤U87细胞、GL261细胞及C6细胞增殖的影响,选取小鼠GBM细胞GL261细胞系、大鼠GBM细胞C6细胞系及人源GBM细胞U87MG细胞系,使用二甲双胍处理,通过CCK-8法检测细胞增殖活性;细胞实时荧光检测细胞凋亡水平;平板克隆实验检测GBM细胞克隆形成能力;CCK-L法检测胞内ATP水平;Western blot检测Akt及其磷酸化水平。结果显示,与对照组相比,随着作用浓度增加,二甲双胍显著抑制GBM细胞增殖活性,影响细胞形态;与对照组相比,同一作用浓度下,二甲双胍提高了GBM细胞凋亡水平,抑制了GBM细胞克隆形成能力,降低了GBM胞内ATP的产生;二甲双胍处理24 h后,GBM细胞内p-Akt表达显著下调,Akt无明显变化。结果表明,二甲双胍在体外可抑制多种GBM细胞的增殖、克隆,降低胞内ATP水平,其机制可能与Akt磷酸化水平相关,研究结果为进一步探索二甲双胍对胶质母细胞瘤的作用机制提供了体外研究理论基础。 相似文献
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Klingler-Hoffmann M Fodero-Tavoletti MT Mishima K Narita Y Cavenee WK Furnari FB Huang HJ Tiganis T 《The Journal of biological chemistry》2001,276(49):46313-46318
Glioblastoma multiforme (GBM) is the most aggressive type of glioma and GBMs frequently contain amplifications or mutations of the EGFR gene. The most common mutation results in a truncated receptor tyrosine kinase known as Delta EGFR that signals constitutively and promotes GBM growth. Here, we report that the 45-kDa variant of the protein tyrosine phosphatase TCPTP (TC45) can recognize Delta EGFR as a cellular substrate. TC45 dephosphorylated Delta EGFR in U87MG glioblastoma cells and inhibited mitogen-activated protein kinase ERK2 and phosphatidylinositol 3-kinase signaling. In contrast, the substrate-trapping TC45-D182A mutant, which is capable of forming stable complexes with TC45 substrates, suppressed the activation of ERK2 but not phosphatidylinositol 3-kinase. TC45 inhibited the proliferation and anchorage-independent growth of Delta EGFR cells but TC45-D182A only inhibited cellular proliferation. Notably, neither TC45 nor TC45-D182A inhibited the proliferation of U87MG cells that did not express Delta EGFR. Delta EGFR activity was necessary for the activation of ERK2, and pharmacological inhibition of ERK2 inhibited the proliferation of Delta EGFR-expressing U87MG cells. Expression of either TC45 or TC45-D182A also suppressed the growth of Delta EGFR-expressing U87MG cells in vivo and prolonged the survival of mice implanted intracerebrally with these tumor cells. These results indicate that TC45 can inhibit the Delta EGFR-mediated activation of ERK2 and suppress the tumorigenicity of Delta EGFR-expressing glioblastoma cells in vivo. 相似文献
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Marta Solinas Paola Massi Valentina Cinquina Marta Valenti Daniele Bolognini Marzia Gariboldi Elena Monti Tiziana Rubino Daniela Parolaro 《PloS one》2013,8(10)
In the present study, we found that CBD inhibited U87-MG and T98G cell proliferation and invasiveness in vitro and caused a decrease in the expression of a set of proteins specifically involved in growth, invasion and angiogenesis. In addition, CBD treatment caused a dose-related down-regulation of ERK and Akt prosurvival signaling pathways in U87-MG and T98G cells and decreased hypoxia inducible factor HIF-1α expression in U87-MG cells. Taken together, these results provide new insights into the antitumor action of CBD, showing that this cannabinoid affects multiple tumoral features and molecular pathways. As CBD is a non-psychoactive phytocannabinoid that appears to be devoid of side effects, our results support its exploitation as an effective anti-cancer drug in the management of gliomas. 相似文献
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The lipid phosphatase activity of PTEN is critical for stabilizing intercellular junctions and reverting invasiveness. 总被引:8,自引:0,他引:8
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L Kotelevets J van Hengel E Bruyneel M Mareel F van Roy E Chastre 《The Journal of cell biology》2001,155(7):1129-1135
To analyze the implication of PTEN in the control of tumor cell invasiveness, the canine kidney epithelial cell lines MDCKras-f and MDCKts-src, expressing activated Ras and a temperature-sensitive v-Src tyrosine kinase, respectively, were transfected with PTEN expression vectors. Likewise, the human PTEN-defective glioblastoma cell lines U87MG and U373MG, the melanoma cell line FM-45, and the prostate carcinoma cell line PC-3 were transfected. We demonstrate that ectopic expression of wild-type PTEN in MDCKts-src cells, but not expression of PTEN mutants deficient in either the lipid or both the lipid and protein phosphatase activities, reverted the morphological transformation, induced cell-cell aggregation, and suppressed the invasive phenotype in an E-cadherin-dependent manner. In contrast, overexpression of wild-type PTEN did not counteract Ras-induced invasiveness of MDCKras-f cells expressing low levels of E-cadherin. PTEN effects were not associated with marked changes in accumulation or phosphorylation levels of E-cadherin and associated catenins. Wild-type, but not mutant, PTEN also reverted the invasive phenotype of U87MG, U373MG, PC-3, and FM-45 cells. Interestingly, PTEN effects were mimicked by N-cadherin-neutralizing antibody in the glioblastoma cell lines. Our data confirm the differential activities of E- and N-cadherin on invasiveness and suggest that the lipid phosphatase activity of PTEN exerts a critical role in stabilizing junctional complexes and restraining invasiveness. 相似文献
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Faisal Alowaidi Saeed M Hashimi Maria Nguyen Mallika Meshram Naif Alqurashi Brenton L Cavanagh Bernadette Bellette Saso Ivanovski Adrian Meedenyia Stephen A Wood 《Journal of cellular biochemistry》2019,120(5):7412-7427
Cripto-1 has been implicated in a number of human cancers. Although there is high potential for a role of Cripto-1 in glioblastoma multiforme (GBM) pathogenesis and progression, few studies have tried to define its role in GBM. These studies were limited in that Cripto-1 expression was not studied in detail in relation to markers of cancer initiation and progression. Therefore, these correlative studies allowed limited interpretation of Criptos-1's effect on the various aspects of GBM development using the U87 GBM cell line. In this study, we sought to delineate the role of Cripto-1 in facilitating pathogenesis, stemness, proliferation, invasion, migration and angiogenesis in GBM. Our findings show that upon overexpressing Cripto-1 in U87 GBM cells, the stemness markers Nanog, Oct4, Sox2, and CD44 increased expression. Similarly, an increase in Ki67 was observed demonstrating Cripto-1's potential to induce cellular proliferation. Likewise, we report a novel finding that increased expression of the markers of migration and invasion, Vimentin and Twist, correlated with upregulation of Cripto-1. Moreover, Cripto-1 exposure led to VEGFR-2 overexpression along with higher tube formation under conditions promoting endothelial growth. Taken together our results support a role for Cripto-1 in the initiation, development, progression, and maintenance of GBM pathogenesis. The data presented here are also consistent with a role for Cripto-1 in the re-growth and invasive growth in GBM. This highlights its potential use as a predictive and diagnostic marker in GBM as well as a therapeutic target. 相似文献