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Thomas R, Srivastava S, Katreddy RR, Sobieski J, Weihua Z. Kinase-Inactivated EGFR Is Required for the Survival of Wild-Type EGFR-Expressing Cancer Cells Treated with Tyrosine Kinase Inhibitors. Int J Mol Sci 2019; 20:ijms20102515. [PMID: 31121829 PMCID: PMC6566606 DOI: 10.3390/ijms20102515] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 05/07/2019] [Accepted: 05/19/2019] [Indexed: 12/28/2022] Open
Abstract
Inhibiting the tyrosine kinase activity of epidermal growth factor receptor (EGFR) using small molecule tyrosine kinase inhibitors (TKIs) is often ineffective in treating cancers harboring wild-type EGFR (wt-EGFR). TKIs are known to cause dimerization of EGFR without altering its expression level. Given the fact that EGFR possesses kinase-independent pro-survival function, the role of TKI-inactivated EGFR in cancer cell survival needs to be addressed. In this study, using wt-EGFR-expressing cancer cells A549 (lung), DU145 (prostate), PC3 (prostate), and MDA-MB-231 (breast), we characterized the TKI-induced dimerization status of EGFR and determined the dependency of cells on kinase-inactivated EGFR for survival. We report that TKI-induced EGFR dimerization is dependent on palmitoylation and independent of its kinase activity, and that mutations of the cysteine residues known to be critical for EGFR’s palmitoylation abolished TKI-induced EGFR dimerization. Furthermore, TKI-induced EGFR dimerization is persistent in TKI-resistant cells, and inhibition of palmitoylation by 2-bromopalmitate, or targeted reduction of the kinase-inactivated EGFR by siRNA or by an EGFR-downregulating peptide, are lethal to TKI-resistant cancer cells. This study suggests that kinase-inactivated EGFR remains to be a viable therapeutic target for wt-EGFR cancers and that inhibiting palmitoylation or downregulating EGFR may overcome TKI resistance.
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Affiliation(s)
- Rintu Thomas
- Department of Biology and Biochemistry, College of Natural Science and Mathematics, University of Houston, Houston, TX 77204-5036, USA.
| | - Shivangi Srivastava
- Department of Biology and Biochemistry, College of Natural Science and Mathematics, University of Houston, Houston, TX 77204-5036, USA.
| | - Rajasekhara Reddy Katreddy
- Department of Biology and Biochemistry, College of Natural Science and Mathematics, University of Houston, Houston, TX 77204-5036, USA.
| | - Jason Sobieski
- Department of Biology and Biochemistry, College of Natural Science and Mathematics, University of Houston, Houston, TX 77204-5036, USA.
| | - Zhang Weihua
- Department of Biology and Biochemistry, College of Natural Science and Mathematics, University of Houston, Houston, TX 77204-5036, USA.
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Guardiola-Serrano F, Beteta-Göbel R, Rodríguez-Lorca R, Ibarguren M, López DJ, Terés S, Alonso-Sande M, Higuera M, Torres M, Busquets X, Escribá PV. The triacylglycerol, hydroxytriolein, inhibits triple negative mammary breast cancer cell proliferation through a mechanism dependent on dihydroceramide and Akt. Oncotarget 2019; 10:2486-2507. [PMID: 31069012 PMCID: PMC6493458 DOI: 10.18632/oncotarget.26824] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 03/04/2019] [Indexed: 12/31/2022] Open
Abstract
The plasma membrane is an attractive target for new anticancer drugs, not least because regulating its lipid structure can control multiple signaling pathways involved in cancer cell proliferation, differentiation and survival. Accordingly, the novel anticancer drug hydroxytriolein (HTO) was designed to interact with and regulate the composition and structure of the membrane, which in turn controls the interaction of amphitropic signaling membrane proteins with the lipid bilayer. Changes in signaling provoked by HTO impair the growth of triple negative breast cancer (TNBC) cells, aggressive breast tumor cells that have a worse prognosis than other types of breast cancers and for which there is as yet no effective targeted therapy. HTO alters the lipid composition and structure of cancer cell membranes, inhibiting the growth of MDA-MB-231 and BT-549 TNBC cells in vitro. Depending on the cellular context, HTO could regulate two pathways involved in TNBC cell proliferation. On the one hand, HTO might stimulate ERK signaling and induce TNBC cell autophagy, while on the other, it could increase dihydroceramide and ceramide production, which would inhibit Akt independently of EGFR activation and provoke cell death. In vivo studies using a model of human TNBC show that HTO and its fatty acid constituent (2-hydroxyoleic acid) impair tumor growth, with no undesired side effects. For these reasons, HTO appears to be a promising anticancer molecule that targets the lipid bilayer (membrane-lipid therapy). By regulating membrane lipids, HTO controls important signaling pathways involved in cancer cell growth, the basis of its pharmacological efficacy and safety.
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Affiliation(s)
- Francisca Guardiola-Serrano
- Laboratory of Molecular Cell Biomedicine, Department of Biology, University of the Balearic Islands, E-07122 Palma, Balearic Islands, Spain
| | - Roberto Beteta-Göbel
- Laboratory of Molecular Cell Biomedicine, Department of Biology, University of the Balearic Islands, E-07122 Palma, Balearic Islands, Spain
| | - Raquel Rodríguez-Lorca
- Laboratory of Molecular Cell Biomedicine, Department of Biology, University of the Balearic Islands, E-07122 Palma, Balearic Islands, Spain
| | - Maitane Ibarguren
- Laboratory of Molecular Cell Biomedicine, Department of Biology, University of the Balearic Islands, E-07122 Palma, Balearic Islands, Spain
| | - David J López
- Laboratory of Molecular Cell Biomedicine, Department of Biology, University of the Balearic Islands, E-07122 Palma, Balearic Islands, Spain
| | - Silvia Terés
- Laboratory of Molecular Cell Biomedicine, Department of Biology, University of the Balearic Islands, E-07122 Palma, Balearic Islands, Spain
| | - María Alonso-Sande
- Laboratory of Molecular Cell Biomedicine, Department of Biology, University of the Balearic Islands, E-07122 Palma, Balearic Islands, Spain
| | - Mónica Higuera
- Laboratory of Molecular Cell Biomedicine, Department of Biology, University of the Balearic Islands, E-07122 Palma, Balearic Islands, Spain
| | - Manuel Torres
- Laboratory of Molecular Cell Biomedicine, Department of Biology, University of the Balearic Islands, E-07122 Palma, Balearic Islands, Spain
| | - Xavier Busquets
- Laboratory of Molecular Cell Biomedicine, Department of Biology, University of the Balearic Islands, E-07122 Palma, Balearic Islands, Spain
| | - Pablo V Escribá
- Laboratory of Molecular Cell Biomedicine, Department of Biology, University of the Balearic Islands, E-07122 Palma, Balearic Islands, Spain
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Functional link between plasma membrane spatiotemporal dynamics, cancer biology, and dietary membrane-altering agents. Cancer Metastasis Rev 2019; 37:519-544. [PMID: 29860560 DOI: 10.1007/s10555-018-9733-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The cell plasma membrane serves as a nexus integrating extra- and intracellular components, which together enable many of the fundamental cellular signaling processes that sustain life. In order to perform this key function, plasma membrane components assemble into well-defined domains exhibiting distinct biochemical and biophysical properties that modulate various signaling events. Dysregulation of these highly dynamic membrane domains can promote oncogenic signaling. Recently, it has been demonstrated that select membrane-targeted dietary bioactives (MTDBs) have the ability to remodel plasma membrane domains and subsequently reduce cancer risk. In this review, we focus on the importance of plasma membrane domain structural and signaling functionalities as well as how loss of membrane homeostasis can drive aberrant signaling. Additionally, we discuss the intricacies associated with the investigation of these membrane domain features and their associations with cancer biology. Lastly, we describe the current literature focusing on MTDBs, including mechanisms of chemoprevention and therapeutics in order to establish a functional link between these membrane-altering biomolecules, tuning of plasma membrane hierarchal organization, and their implications in cancer prevention.
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54
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Defining Metabolic Rewiring in Lung Squamous Cell Carcinoma. Metabolites 2019; 9:metabo9030047. [PMID: 30866469 PMCID: PMC6468359 DOI: 10.3390/metabo9030047] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 02/26/2019] [Accepted: 03/02/2019] [Indexed: 01/19/2023] Open
Abstract
Metabolomics based on untargeted flow infusion electrospray ionization high-resolution mass spectrometry (FIE-HRMS) can provide a snap-shot of metabolism in living cells. Lung Squamous Cell Carcinoma (SCC) is one of the predominant subtypes of Non-Small Cell Lung Cancers (NSCLCs), which usually shows a poor prognosis. We analysed lung SCC samples and matched histologically normal lung tissues from eight patients. Metabolites were profiled by FIE-HRMS and assessed using t-test and principal component analysis (PCA). Differentially accumulating metabolites were mapped to pathways using the mummichog algorithm in R, and biologically meaningful patterns were indicated by Metabolite Set Enrichment Analysis (MSEA). We identified metabolic rewiring networks, including the suppression of the oxidative pentose pathway and found that the normal tricarboxylic acid (TCA) cycle were decoupled from increases in glycolysis and glutamine reductive carboxylation. Well-established associated effects on nucleotide, amino acid and thiol metabolism were also seen. Novel aspects in SCC tissue were increased in Vitamin B complex cofactors, serotonin and a reduction of γ-aminobutyric acid (GABA). Our results show the value of FIE-HRMS as a high throughput screening method that could be exploited in clinical contexts.
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Whalen DS, Widatalla SE, Korolkova OY, Nangami GS, Beasley HK, Williams SD, Virgous C, Lehmann BD, Ochieng J, Sakwe AM. Implication of calcium activated RasGRF2 in Annexin A6-mediated breast tumor cell growth and motility. Oncotarget 2019; 10:133-151. [PMID: 30719209 PMCID: PMC6349432 DOI: 10.18632/oncotarget.26512] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Accepted: 12/16/2018] [Indexed: 01/10/2023] Open
Abstract
The role of AnxA6 in breast cancer and in particular, the mechanisms underlying its contribution to tumor cell growth and/or motility remain poorly understood. In this study, we established the tumor suppressor function of AnxA6 in triple negative breast cancer (TNBC) cells by showing that loss of AnxA6 is associated with early onset and rapid growth of xenograft TNBC tumors in mice. We also identified the Ca2+ activated RasGRF2 as an effector of AnxA6 mediated TNBC cell growth and motility. Activation of Ca2+ mobilizing oncogenic receptors such as epidermal growth factor receptor (EGFR) in TNBC cells or pharmacological stimulation of Ca2+ influx led to activation, subsequent degradation and altered effector functions of RasGRF2. Inhibition of Ca2+ influx or overexpression of AnxA6 blocked the activation/degradation of RasGRF2. We also show that AnxA6 acts as a scaffold for RasGRF2 and Ras proteins and that its interaction with RasGRF2 is modulated by GTP and/or activation of Ras proteins. Meanwhile, down-regulation of RasGRF2 and treatment of cells with the EGFR-targeted tyrosine kinase inhibitor (TKI) lapatinib strongly attenuated the growth of otherwise EGFR-TKI resistant AnxA6 high TNBC cells. These data not only suggest that AnxA6 modulated Ca2+ influx and effector functions of RasGRF2 underlie at least in part, the AnxA6 mediated TNBC cell growth and/or motility, but also provide a rationale to target Ras-driven TNBC with EGFR targeted therapies in combination with inhibition of RasGRF2.
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Affiliation(s)
- Diva S Whalen
- Department of Biochemistry and Cancer Biology, School of Graduate Studies and Research, Meharry Medical College, Nashville, TN, USA
| | - Sarrah E Widatalla
- Department of Biochemistry and Cancer Biology, School of Graduate Studies and Research, Meharry Medical College, Nashville, TN, USA
| | - Olga Y Korolkova
- Department of Biochemistry and Cancer Biology, School of Graduate Studies and Research, Meharry Medical College, Nashville, TN, USA
| | - Gladys S Nangami
- Department of Biochemistry and Cancer Biology, School of Graduate Studies and Research, Meharry Medical College, Nashville, TN, USA
| | - Heather K Beasley
- Department of Biochemistry and Cancer Biology, School of Graduate Studies and Research, Meharry Medical College, Nashville, TN, USA
| | - Stephen D Williams
- Department of Biochemistry and Cancer Biology, School of Graduate Studies and Research, Meharry Medical College, Nashville, TN, USA
| | - Carlos Virgous
- Animal Care Facility, Meharry Medical College, Nashville, TN, USA
| | - Brian D Lehmann
- Department of Biochemistry, Vanderbilt University, Nashville, TN, USA
| | - Josiah Ochieng
- Department of Biochemistry and Cancer Biology, School of Graduate Studies and Research, Meharry Medical College, Nashville, TN, USA
| | - Amos M Sakwe
- Department of Biochemistry and Cancer Biology, School of Graduate Studies and Research, Meharry Medical College, Nashville, TN, USA
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Kim YR, Kim YW, Lee SE, Yang HW, Kim SY. Personalized Prediction of Acquired Resistance to EGFR-Targeted Inhibitors Using a Pathway-Based Machine Learning Approach. Cancers (Basel) 2019; 11:cancers11010045. [PMID: 30621238 PMCID: PMC6357167 DOI: 10.3390/cancers11010045] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 12/22/2018] [Accepted: 12/26/2018] [Indexed: 11/16/2022] Open
Abstract
Epidermal growth factor receptor (EGFR) inhibitors have benefitted cancer patients worldwide, but resistance inevitably develops over time, resulting in treatment failures. An accurate prediction model for acquired resistance (AR) to EGFR inhibitors is critical for early diagnosis and according intervention, but is not yet available due to personal variations and the complex mechanisms of AR. Here, we have developed a novel pipeline to build a meta-analysis-based, multivariate model for personalized pathways in AR to EGFR inhibitors, using sophisticated machine learning algorithms. Surprisingly, the model achieved excellent predictive performance, with a cross-study validation area under curve (AUC) of over 0.9, and generalization performance on independent cohorts of samples, with a perfect AUC score of 1. Furthermore, the model showed excellent transferability across different cancer cell lines and EGFR inhibitors, including gefitinib, erlotinib, afatinib, and cetuximab. In conclusion, our model achieved high predictive accuracy through robust cross study validation, and enabled individualized prediction on newly introduced data. We also discovered common pathway alteration signatures for AR to EGFR inhibitors, which can provide directions for other follow-up studies.
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Affiliation(s)
- Young Rae Kim
- Department of Biochemistry, School of Medicine, Konkuk University, 120, Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea.
| | - Yong Wan Kim
- Department of Biochemistry, School of Medicine, Konkuk University, 120, Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea.
| | - Suh Eun Lee
- Department of Biochemistry, School of Medicine, Konkuk University, 120, Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea.
| | - Hye Won Yang
- School of Medicine, Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse Street, D02 R590 Dublin, Ireland.
| | - Sung Young Kim
- Department of Biochemistry, School of Medicine, Konkuk University, 120, Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea.
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57
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Hao B, Yu M, Sang C, Bi B, Chen J. Dyslipidemia and non-small cell lung cancer risk in Chinese population: a case-control study. Lipids Health Dis 2018; 17:278. [PMID: 30522496 PMCID: PMC6284307 DOI: 10.1186/s12944-018-0925-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 11/22/2018] [Indexed: 12/16/2022] Open
Abstract
Background Numerous studies reported that dyslipidemia was associated with cancer risk. However, few studies investigated the associations between dyslipidemia and non-small cell lung cancer (NSCLC). Methods Four hundred twenty-four histologically confirmed NSCLC cases and 414 controls, matched for age and sex, were enrolled to examine the relationship between dyslipidemia and NSCLC. Demographic and clinical data were obtained from patients’ medical records and telephone interviews. Odds ratios (ORs) and 95% confidence intervals (CIs) were estimated using unconditional logistic regression. Results Abnormal triglyceride (TG) and high-density lipoprotein cholesterol (HDL-C) levels showed statistically significant coexistence with NSCLC compared with controls. Higher levels of TG were associated with a higher risk of NSCLC (OR = 1.541, 95% CI, (1.072–2.215)). The odds ratios (ORs) for NSCLC for normal and high levels of HDL-C versus those with a low level of HDL-C were 0.337(95% CI, (0.242–0.468)) and 0.288(95% CI, (0.185–0.448)), respectively. After adjustment for age, sex, smoking status, hypertension, body mass index, diabetes and lipid profiles, the adjusted OR for normal and high levels of HDL-C were 0.320(95% CI, (0.218–0.470)) and 0.233(95% CI, (0.134–0.407)), respectively. However, after adjustment, high levels of TG increased the risk of NSCLC but not significantly (OR = 1.052, 95% CI (0.671–1.649)). Conclusions This study provided evidence that dyslipidemia increased the risk of NSCLC in Chinese population.
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Affiliation(s)
- Bo Hao
- Department of Cardiothoracic Surgery, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, 441021, China
| | - Miaomei Yu
- Comprehensive Laboratory, the Third Affiliated Hospital of Soochow University, Changzhou, 213003, China
| | - Chen Sang
- Department of Cardiothoracic Surgery, the Third Affiliated Hospital of Soochow University, Changzhou, 213003, China
| | - Baochen Bi
- Department of Cardiothoracic Surgery, the Third Affiliated Hospital of Soochow University, Changzhou, 213003, China
| | - Jiajun Chen
- Department of Cardiothoracic Surgery, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, 441021, China.
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Parsons TK, Pratt RN, Tang L, Wu Y. An active and selective molecular mechanism mediating the uptake of sex steroids by prostate cancer cells. Mol Cell Endocrinol 2018; 477:121-131. [PMID: 29928927 DOI: 10.1016/j.mce.2018.06.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 05/31/2018] [Accepted: 06/16/2018] [Indexed: 12/21/2022]
Abstract
Steroid hormones play important roles in normal physiological functions and diseases. Sex steroids hormones are important in the biology and treatment of sex hormone-related cancer such as prostate cancer and breast cancer. Cells may take up steroids using multiple mechanisms. The conventionally accepted hypothesis that steroids cross cell membrane through passive diffusion has not been tested rigorously. Experimental data suggested that cells may take up sex steroid using an active uptake mechanism. 3H-testosterone uptake by prostate cancer cells showed typical transporter-mediated uptake kinetic. Cells retained testosterone taken up from the medium. The uptake of testosterone was selective for certain steroid hormones but not others. Data also indicated that the active and selective uptake mechanism resided in cholesterol-rich membrane domains, and may involve ATP and membrane transporters. In summary, the present study provided strong evidence to support the existence of an active and selective molecular mechanism for sex steroid uptake.
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Affiliation(s)
- Todd K Parsons
- Department of Urology, Roswell Park Comprehensive Cancer Center, Elm and Carlton Streets, Buffalo, NY, 14263, USA
| | - Rachel N Pratt
- Department of Cancer Prevention and Control, Roswell Park Comprehensive Cancer Center, Elm and Carlton Streets, Buffalo, NY, 14263, USA
| | - Li Tang
- Department of Cancer Prevention and Control, Roswell Park Comprehensive Cancer Center, Elm and Carlton Streets, Buffalo, NY, 14263, USA
| | - Yue Wu
- Department of Urology, Roswell Park Comprehensive Cancer Center, Elm and Carlton Streets, Buffalo, NY, 14263, USA.
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Immunoliposomes with Simvastatin as a Potential Therapeutic in Treatment of Breast Cancer Cells Overexpressing HER2-An In Vitro Study. Cancers (Basel) 2018; 10:cancers10110418. [PMID: 30388834 PMCID: PMC6266203 DOI: 10.3390/cancers10110418] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 10/22/2018] [Accepted: 10/30/2018] [Indexed: 12/16/2022] Open
Abstract
Lipophilic statins are promising candidates for breast cancer treatment. However, anticancer therapy requires much higher doses of statins than can be delivered orally, and such high doses are known to exert more adverse effects. The main objective of our study was to design a targeted, therapeutic liposomal carrier of simvastatin characterised by high stability and specificity towards breast cancer cells. We chose SKBR3, the cell line that showed the highest sensitivity for simvastatin and liposomal simvastatin treatment. Additionally, SKBR3 has a notably high expression level of human epidermal growth factor receptor 2 (HER2), which we used as a target for our immunoliposomes. To do so we attached humanized anti-HER2 antibody to the envelope of liposomes. We tested the stability and selectivity of the proposed formulation along with the toxicity, ability to induce apoptosis and the effect on signalling pathways involving Akt and Erk kinases. The immunoliposomal formulation of simvastatin is characterized by long-term stability, high selectivity towards HER2-overexpressing breast cancer cells, low non-specific cytotoxicity and effective inhibition of the growth of target cells, presumably by inhibition of signalling pathways and induction of apoptosis. Hence, for the first time, we propose the use of immunoliposomes with simvastatin, targeted directly towards breast cancer cells overexpressing HER2. The prepared immunoliposomes may become a proof of concept in developing new anticancer therapy.
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60
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McDaniel NK, Cummings CT, Iida M, Hülse J, Pearson HE, Vasileiadi E, Parker RE, Orbuch RA, Ondracek OJ, Welke NB, Kang GH, Davies KD, Wang X, Frye SV, Earp HS, Harari PM, Kimple RJ, DeRyckere D, Graham DK, Wheeler DL. MERTK Mediates Intrinsic and Adaptive Resistance to AXL-targeting Agents. Mol Cancer Ther 2018; 17:2297-2308. [PMID: 30093568 PMCID: PMC6215511 DOI: 10.1158/1535-7163.mct-17-1239] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 05/23/2018] [Accepted: 07/31/2018] [Indexed: 12/17/2022]
Abstract
The TAM (TYRO3, AXL, MERTK) family receptor tyrosine kinases (RTK) play an important role in promoting growth, survival, and metastatic spread of several tumor types. AXL and MERTK are overexpressed in head and neck squamous cell carcinoma (HNSCC), triple-negative breast cancer (TNBC), and non-small cell lung cancer (NSCLC), malignancies that are highly metastatic and lethal. AXL is the most well-characterized TAM receptor and mediates resistance to both conventional and targeted cancer therapies. AXL is highly expressed in aggressive tumor types, and patients with cancer are currently being enrolled in clinical trials testing AXL inhibitors. In this study, we analyzed the effects of AXL inhibition using a small-molecule AXL inhibitor, a monoclonal antibody (mAb), and siRNA in HNSCC, TNBC, and NSCLC preclinical models. Anti-AXL-targeting strategies had limited efficacy across these different models that, our data suggest, could be attributed to upregulation of MERTK. MERTK expression was increased in cell lines and patient-derived xenografts treated with AXL inhibitors and inhibition of MERTK sensitized HNSCC, TNBC, and NSCLC preclinical models to AXL inhibition. Dual targeting of AXL and MERTK led to a more potent blockade of downstream signaling, synergistic inhibition of tumor cell expansion in culture, and reduced tumor growth in vivo Furthermore, ectopic overexpression of MERTK in AXL inhibitor-sensitive models resulted in resistance to AXL-targeting strategies. These observations suggest that therapeutic strategies cotargeting both AXL and MERTK could be highly beneficial in a variety of tumor types where both receptors are expressed, leading to improved survival for patients with lethal malignancies. Mol Cancer Ther; 17(11); 2297-308. ©2018 AACR.
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Affiliation(s)
- Nellie K McDaniel
- University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Christopher T Cummings
- Department of Pediatrics, Section of Hematology, Oncology, and Bone Marrow Transplantation, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Mari Iida
- University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Justus Hülse
- Aflac Cancer and Blood Disorders Center of Children's Healthcare of Atlanta and Department of Pediatrics, School of Medicine, Emory University, Atlanta, Georgia
| | - Hannah E Pearson
- University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Eleana Vasileiadi
- Aflac Cancer and Blood Disorders Center of Children's Healthcare of Atlanta and Department of Pediatrics, School of Medicine, Emory University, Atlanta, Georgia
| | - Rebecca E Parker
- Aflac Cancer and Blood Disorders Center of Children's Healthcare of Atlanta and Department of Pediatrics, School of Medicine, Emory University, Atlanta, Georgia
| | - Rachel A Orbuch
- University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Olivia J Ondracek
- University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Noah B Welke
- University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Grace H Kang
- University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Kurtis D Davies
- Department of Pediatrics, Section of Hematology, Oncology, and Bone Marrow Transplantation, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Xiaodong Wang
- Center for Integrative Chemical Biology and Drug Discovery and Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Stephen V Frye
- Center for Integrative Chemical Biology and Drug Discovery and Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
- Department of Medicine, UNC Lineberger Comprehensive Cancer Center, Chapel Hill, North Carolina
| | - H Shelton Earp
- Department of Medicine, UNC Lineberger Comprehensive Cancer Center, Chapel Hill, North Carolina
- Department of Pharmacology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Paul M Harari
- University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Randall J Kimple
- University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Deborah DeRyckere
- Aflac Cancer and Blood Disorders Center of Children's Healthcare of Atlanta and Department of Pediatrics, School of Medicine, Emory University, Atlanta, Georgia
| | - Douglas K Graham
- Aflac Cancer and Blood Disorders Center of Children's Healthcare of Atlanta and Department of Pediatrics, School of Medicine, Emory University, Atlanta, Georgia.
| | - Deric L Wheeler
- University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin.
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Small-Molecule Modulation of Lipid-Dependent Cellular Processes against Cancer: Fats on the Gunpoint. BIOMED RESEARCH INTERNATIONAL 2018; 2018:6437371. [PMID: 30186863 PMCID: PMC6114229 DOI: 10.1155/2018/6437371] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Accepted: 07/22/2018] [Indexed: 12/27/2022]
Abstract
Lipid cell membrane composed of various distinct lipids and proteins act as a platform to assemble various signaling complexes regulating innumerous cellular processes which are strongly downregulated or altered in cancer cells emphasizing the still-underestimated critical function of lipid biomolecules in cancer initiation and progression. In this review, we outline the current understanding of how membrane lipids act as signaling hot spots by generating distinct membrane microdomains called rafts to initiate various cellular processes and their modulation in cancer phenotypes. We elucidate tangible drug targets and pathways all amenable to small-molecule perturbation. Ranging from targeting membrane rafts organization/reorganization to rewiring lipid metabolism and lipid sorting in cancer, the work summarized here represents critical intervention points being attempted for lipid-based anticancer therapy and future directions.
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Sun L, Chen L, Bai L, Xia Y, Yang X, Jiang W, Sun W. Reactive oxygen species mediates 50-Hz magnetic field-induced EGF receptor clustering via acid sphingomyelinase activation. Int J Radiat Biol 2018; 94:678-684. [PMID: 29659325 DOI: 10.1080/09553002.2018.1466208] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
PURPOSE Exposure to extremely low frequency electromagnetic fields (ELF-EMFs) could elicit biological effects including carcinogenesis. However, the detailed mechanisms by which these ELF-EMFs interact with biological system are currently unclear. Previously, we found that a 50-Hz magnetic field (MF) exposure could induce epidermal growth factor receptor (EGFR) clustering and phosphorylation on cell membranes. In the present experiment, the possible roles of reactive oxygen species (ROS) in MF-induced EGFR clustering were investigated. MATERIALS AND METHODS Human amnion epithelial (FL) cells were exposed to a 50-Hz MF with or without N-acetyl-l-cysteine (NAC) or pyrrolidine dithiocarbamate (PDTC). EGFR clustering on cellular membrane surface was analyzed using confocal microscopy after indirect immunofluorescence staining. The intracellular ROS level and acid sphingomyelinase (ASMase) activity were detected using an ROS assay kit and an Amplex® Red Sphingomyelinase Assay Kit, respectively. RESULTS Results showed that exposure of FL cells to a 50-Hz MF at 0.4 mT for 15 min significantly enhanced the ROS level, induced EGFR clustering and increased ASMase activity. However, pretreatment with NAC or PDTC, the scavenger of ROS, not only counteracted the effects of a 50-Hz MF on ROS level and AMS activity, but also inhibited the EGFR clustering induced by MF exposure. CONCLUSIONS The present and previous data suggest that ROS mediates the MF-induced EGFR clustering via ASMase activation.
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Affiliation(s)
- Liyuan Sun
- a Bioelectromagnetics Key Laboratory, Zhejiang University School of Medicine , Hangzhou , China.,b The Second Affiliated Hospital, Zhejiang University School of Medicine , Hangzhou , China
| | - Liangjing Chen
- a Bioelectromagnetics Key Laboratory, Zhejiang University School of Medicine , Hangzhou , China
| | - Lina Bai
- a Bioelectromagnetics Key Laboratory, Zhejiang University School of Medicine , Hangzhou , China
| | - Yongpeng Xia
- a Bioelectromagnetics Key Laboratory, Zhejiang University School of Medicine , Hangzhou , China
| | - Xiaobo Yang
- a Bioelectromagnetics Key Laboratory, Zhejiang University School of Medicine , Hangzhou , China
| | - Wei Jiang
- c Institute of Environmental Medicine, Zhejiang University School of Medicine , Hangzhou , China
| | - Wenjun Sun
- a Bioelectromagnetics Key Laboratory, Zhejiang University School of Medicine , Hangzhou , China.,c Institute of Environmental Medicine, Zhejiang University School of Medicine , Hangzhou , China
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NOTCH3 inactivation increases triple negative breast cancer sensitivity to gefitinib by promoting EGFR tyrosine dephosphorylation and its intracellular arrest. Oncogenesis 2018; 7:42. [PMID: 29795369 PMCID: PMC5968025 DOI: 10.1038/s41389-018-0051-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 04/06/2018] [Accepted: 04/19/2018] [Indexed: 12/15/2022] Open
Abstract
Notch dysregulation has been implicated in numerous tumors, including triple-negative breast cancer (TNBC), which is the breast cancer subtype with the worst clinical outcome. However, the importance of individual receptors in TNBC and their specific mechanism of action remain to be elucidated, even if recent findings suggested a specific role of activated-Notch3 in a subset of TNBCs. Epidermal growth factor receptor (EGFR) is overexpressed in TNBCs but the use of anti-EGFR agents (including tyrosine kinase inhibitors, TKIs) has not been approved for the treatment of these patients, as clinical trials have shown disappointing results. Resistance to EGFR blockers is commonly reported. Here we show that Notch3-specific inhibition increases TNBC sensitivity to the TKI-gefitinib in TNBC-resistant cells. Mechanistically, we demonstrate that Notch3 is able to regulate the activated EGFR membrane localization into lipid rafts microdomains, as Notch3 inhibition, such as rafts depletion, induces the EGFR internalization and its intracellular arrest, without involving receptor degradation. Interestingly, these events are associated with the EGFR tyrosine dephosphorylation at Y1173 residue (but not at Y1068) by the protein tyrosine phosphatase H1 (PTPH1), thus suggesting its possible involvement in the observed Notch3-dependent TNBC sensitivity response to gefitinib. Consistent with this notion, a nuclear localization defect of phospho-EGFR is observed after combined blockade of EGFR and Notch3, which results in a decreased TNBC cell survival. Notably, we observed a significant correlation between EGFR and NOTCH3 expression levels by in silico gene expression and immunohistochemical analysis of human TNBC primary samples. Our findings strongly suggest that combined therapies of TKI-gefitinib with Notch3-specific suppression may be exploited as a drug combination advantage in TNBC treatment.
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Fuentes NR, Kim E, Fan YY, Chapkin RS. Omega-3 fatty acids, membrane remodeling and cancer prevention. Mol Aspects Med 2018; 64:79-91. [PMID: 29627343 DOI: 10.1016/j.mam.2018.04.001] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 03/27/2018] [Accepted: 04/04/2018] [Indexed: 12/20/2022]
Abstract
Proteins are often credited as the macromolecule responsible for performing critical cellular functions, however lipids have recently garnered more attention as our understanding of their role in cell function and human health becomes more apparent. Although cellular membranes are the lipid environment in which many proteins function, it is now apparent that protein and lipid assemblies can be organized to form distinct micro- or nanodomains that facilitate signaling events. Indeed, it is now appreciated that cellular function is partly regulated by the specific spatiotemporal lipid composition of the membrane, down to the nanosecond and nanometer scale. Furthermore, membrane composition is altered during human disease processes such as cancer and obesity. For example, an increased rate of lipid/cholesterol synthesis in cancerous tissues has long been recognized as an important aspect of the rewired metabolism of transformed cells. However, the contribution of lipids/cholesterol to cellular function in disease models is not yet fully understood. Furthermore, an important consideration in regard to human health is that diet is a major modulator of cell membrane composition. This can occur directly through incorporation of membrane substrates, such as fatty acids, e.g., n-3 polyunsaturated fatty acids (n-3 PUFA) and cholesterol. In this review, we describe scenarios in which changes in membrane composition impact human health. Particular focus is placed on the importance of intrinsic lipid/cholesterol biosynthesis and metabolism and extrinsic dietary modification in cancer and its effect on plasma membrane properties.
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Affiliation(s)
- Natividad R Fuentes
- Program in Integrative Nutrition & Complex Diseases, Texas A&M University, USA; Faculty of Toxicology, Texas A&M University, USA
| | - Eunjoo Kim
- Program in Integrative Nutrition & Complex Diseases, Texas A&M University, USA; Department of Molecular and Cellular Medicine, Texas A&M University, USA
| | - Yang-Yi Fan
- Program in Integrative Nutrition & Complex Diseases, Texas A&M University, USA; Department of Nutrition & Food Science, Texas A&M University, USA
| | - Robert S Chapkin
- Program in Integrative Nutrition & Complex Diseases, Texas A&M University, USA; Faculty of Toxicology, Texas A&M University, USA; Department of Nutrition & Food Science, Texas A&M University, USA; Center for Translational Environmental Health Research, Texas A&M University, USA.
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Chen Q, Pan Z, Zhao M, Wang Q, Qiao C, Miao L, Ding X. High cholesterol in lipid rafts reduces the sensitivity to EGFR-TKI therapy in non-small cell lung cancer. J Cell Physiol 2018; 233:6722-6732. [PMID: 29215723 DOI: 10.1002/jcp.26351] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2017] [Accepted: 12/01/2017] [Indexed: 12/14/2022]
Abstract
Overcoming EGFR-TKI resistant which has the initial enthusiasm over substantial clinical responses is a formidable challenge on nowadays. In this study, we showed that cholesterol level in lipid rafts in gefitinib resistant non-small cell lung cancer (NSCLC) cell lines was remarkably higher than gefitinib sensitive cell line, and depletion of cholesterol increased gefitinib sensitivity. Furthermore, cholesterol-depleted enhanced gefitinib inhibit phosphorylation of EGFR, Akt-1, MEK1/2, and ERK1/2 and these were reversed in cholesterol add-back experiments. Gefitinib resistant cell lines showed high affinity of gefitinib and EGFR when cholesterol was depleted. Therefore, targeting cholesterol combined with EGFR-TKI is potentially a novel therapeutic strategy for gefitinib resistant treatment.
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Affiliation(s)
- Qiufang Chen
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Zhenzhen Pan
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Min Zhao
- School of Medicine and Chemical Engineering, Taizhou University, Taizhou, China
| | - Qin Wang
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Chen Qiao
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Liyun Miao
- Department of Respiration, The affiliated Drum Tower Hospital of Nanjing University Medical College, Nanjing, China
| | - Xuansheng Ding
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
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Ferguson R, Subramanian V. The cellular uptake of angiogenin, an angiogenic and neurotrophic factor is through multiple pathways and largely dynamin independent. PLoS One 2018; 13:e0193302. [PMID: 29486010 PMCID: PMC5828446 DOI: 10.1371/journal.pone.0193302] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 02/08/2018] [Indexed: 01/25/2023] Open
Abstract
Angiogenin (ANG), a member of the RNase superfamily (also known as RNase 5) has neurotrophic, neuroprotective and angiogenic activities. Recently it has also been shown to be important in stem cell homeostasis. Mutations in ANG are associated with neurodegenerative diseases such as Amyotrophic Lateral Sclerosis (ALS) and Fronto-temporal dementia (FTD). ANG is a secreted protein which is taken up by cells and translocated to the nucleus. However, the import pathway/s through which ANG is taken up is/are still largely unclear. We have characterised the uptake of ANG in neuronal, astrocytic and microglial cell lines as well as primary neurons and astrocytes using pharmacological agents as well as dominant negative dynamin and Rab5 to perturb uptake and intracellular trafficking. We find that uptake of ANG is largely clathrin/dynamin independent and microtubule depolymerisation has a marginal effect. Perturbation of membrane ruffling and macropinocytosis significantly inhibited ANG uptake suggesting an uptake mechanism similar to RNase A. Our findings shed light on why mutations which do not overtly affect RNase activity but cause impaired localization are associated with neurodegenerative disease.
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Affiliation(s)
- Ross Ferguson
- Department of Biology and Biochemistry, University of Bath, Bath, United Kingdom
| | - Vasanta Subramanian
- Department of Biology and Biochemistry, University of Bath, Bath, United Kingdom
- * E-mail:
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Fan XX, Leung ELH, Xie Y, Liu ZQ, Zheng YF, Yao XJ, Lu LL, Wu JL, He JX, Yuan ZW, Fu J, Wei CL, Huang J, Xiao DK, Luo LX, Jiang ZB, Zhou YL, Kam RKT, Liu L. Suppression of Lipogenesis via Reactive Oxygen Species-AMPK Signaling for Treating Malignant and Proliferative Diseases. Antioxid Redox Signal 2018; 28:339-357. [PMID: 28665143 DOI: 10.1089/ars.2017.7090] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
AIMS Systemic diseases often have common characteristics. The aim of this study was to investigate the feasibility of targeting common pathological metabolism to inhibit the progression of malignant and proliferative diseases. RESULTS Gefitinib-resistant (G-R) nonsmall-cell lung cancer (NSCLC) and rheumatoid arthritis (RA) were studied as conditions representative of malignant and proliferative diseases, respectively. Strong lipogenic activity and high expression of sterol regulatory element-binding protein 1 (SREBP1) were found in both G-R NSCLC cells and synovial fibroblasts from RA patients (RASFs). Berberine (BBR), an effective suppressor of SREBP1 and lipogenesis regulated through reactive oxygen species (ROS)/AMPK pathway, selectively inhibited the growth of G-R NSCLC cells and RASFs but not that of normal cells. It effectively caused mitochondrial dysfunction, activated ROS/AMPK pathway, and finally suppressed cellular lipogenesis and cell proliferation. Addition of ROS blocker, AMPK inhibitor, and palmitic acid significantly reduced the effect of BBR. In an in vivo study, treatment of BBR led to significant inhibition of mouse tumor xenograft growth and remarkably slowed down the development of adjuvant-induced arthritis in rats. Innovation and Conclusion: Targeting ROS/AMPK/lipogenesis signaling pathway selectively inhibited the growth of G-R NSCLC cells and the progress of RASFs in vitro and in vivo, which provides a new avenue for treating malignancies and proliferative diseases. Antioxid. Redox Signal. 28, 339-357.
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Affiliation(s)
- Xing-Xing Fan
- 1 State Key Laboratory of Quality Research in Chinese Medicine/Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology , Macau (SAR), China
| | - Elaine Lai-Han Leung
- 1 State Key Laboratory of Quality Research in Chinese Medicine/Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology , Macau (SAR), China
| | - Ying Xie
- 1 State Key Laboratory of Quality Research in Chinese Medicine/Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology , Macau (SAR), China
| | - Zhong Qiu Liu
- 2 International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine , Guangzhou, China
| | - Yan Fang Zheng
- 3 Fujian University of Traditional Chinese Medicine , College of Pharmacy, Minhoushangjie, Fuzhou, China
| | - Xiao Jun Yao
- 1 State Key Laboratory of Quality Research in Chinese Medicine/Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology , Macau (SAR), China
| | - Lin Lin Lu
- 2 International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine , Guangzhou, China
| | - Jian Lin Wu
- 1 State Key Laboratory of Quality Research in Chinese Medicine/Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology , Macau (SAR), China
| | - Jian-Xing He
- 4 State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Disease , The 1st Affiliated Hospital of Guangzhou Medical College, Guangzhou, China
| | - Zhong-Wen Yuan
- 1 State Key Laboratory of Quality Research in Chinese Medicine/Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology , Macau (SAR), China
| | - JunJiang Fu
- 5 Key Laboratory of Epigenetics and Oncology, Research Center for Precision Medicine, Southwest Medical University , Luzhou, China
| | - Chun-Li Wei
- 1 State Key Laboratory of Quality Research in Chinese Medicine/Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology , Macau (SAR), China
| | - Jun Huang
- 4 State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Disease , The 1st Affiliated Hospital of Guangzhou Medical College, Guangzhou, China
| | - Da Kai Xiao
- 4 State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Disease , The 1st Affiliated Hospital of Guangzhou Medical College, Guangzhou, China
| | - Lian Xiang Luo
- 1 State Key Laboratory of Quality Research in Chinese Medicine/Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology , Macau (SAR), China
| | - Ze Bo Jiang
- 1 State Key Laboratory of Quality Research in Chinese Medicine/Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology , Macau (SAR), China
| | - Yan-Ling Zhou
- 1 State Key Laboratory of Quality Research in Chinese Medicine/Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology , Macau (SAR), China
| | - Richard Kin-Ting Kam
- 6 Department of Chemical Pathology, Faculty of Medicine, The Chinese University of Hong Kong , Hong Kong (SAR), China
| | - Liang Liu
- 1 State Key Laboratory of Quality Research in Chinese Medicine/Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology , Macau (SAR), China
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Kishi S, Fujiwara-Tani R, Luo Y, Kawahara I, Goto K, Fujii K, Ohmori H, Nakashima C, Sasaki T, Kuniyasu H. Pro-metastatic signaling of the trans fatty acid elaidic acid is associated with lipid rafts. Oncol Lett 2018; 15:4423-4426. [PMID: 29556289 DOI: 10.3892/ol.2018.7817] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 01/11/2018] [Indexed: 12/23/2022] Open
Abstract
Trans fatty acids (TFAs) are risk factors for cardiovascular disorders, and the cancer-promoting effects of TFAs have been previously reported. The present study examined the effects and signaling of elaidic acid (EA), a TFA, in colorectal cancer (CRC) cells. Oral intake of EA was found to increase metastasis of HT29 human CRC cells. Results indicated that, in the plasma membrane, EA was integrated into cholesterol rafts, which contain epidermal growth factor receptors (EGFR). EA increased nanog and c-myc, and decreased PGC-1A through lipid raft-associated EGFR signaling in HT29 cells. Depletion of cholesterol by methyl-β-cyclodextrin treatment abrogated the EA-induced stemness and oxidative phosphorylation. Simvastatin treatment also abrogated EA-enhanced tumor growth. These results indicate that EA enhances the stemness by activating EGFR in lipid rafts.
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Affiliation(s)
- Shingo Kishi
- Department of Molecular Pathology, Nara Medical University, Kashihara, Nara 634-8521, Japan
| | - Rina Fujiwara-Tani
- Department of Molecular Pathology, Nara Medical University, Kashihara, Nara 634-8521, Japan
| | - Yi Luo
- Jiangsu Province Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, P.R. China
| | - Isao Kawahara
- Department of Molecular Pathology, Nara Medical University, Kashihara, Nara 634-8521, Japan
| | - Kei Goto
- Department of Molecular Pathology, Nara Medical University, Kashihara, Nara 634-8521, Japan
| | - Kiyomu Fujii
- Department of Molecular Pathology, Nara Medical University, Kashihara, Nara 634-8521, Japan
| | - Hitoshi Ohmori
- Department of Molecular Pathology, Nara Medical University, Kashihara, Nara 634-8521, Japan
| | - Chie Nakashima
- Department of Molecular Pathology, Nara Medical University, Kashihara, Nara 634-8521, Japan
| | - Takamitsu Sasaki
- Department of Molecular Pathology, Nara Medical University, Kashihara, Nara 634-8521, Japan
| | - Hiroki Kuniyasu
- Department of Molecular Pathology, Nara Medical University, Kashihara, Nara 634-8521, Japan
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Reverse engineering of triple-negative breast cancer cells for targeted treatment. Maturitas 2017; 108:24-30. [PMID: 29290211 DOI: 10.1016/j.maturitas.2017.11.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 10/23/2017] [Accepted: 11/09/2017] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Targeting the human epidermal growth factor receptor HER2 has increased survival in HER2-positive breast cancer patients. In the contrast, for triple-negative breast cancer (TNBC) patients, no targeted agents are available. We hypothesized that artificial overexpression of HER2 in TNBC cells might induce sensitivity to anti-HER2 agents in these cells. METHODS TNBC cell lines were transduced using lentiviral HER2 overexpression particles. Functionality of HER2 was determined by protein analysis and localization studies. The tumorigenic potential of HER2 overexpressing cells was assessed by analysis of proliferation, migration and invasion capacity. Response to chemotherapeutic agents and anti-HER2 agents was determined by cell viability assays. RESULTS We demonstrated functional overexpression of HER2 in TNBC cell lines of different subtypes. Whereas in cell types with more pronounced epithelial features (e.g. MDA-MB-468) HER2 overexpression increases proliferation and migration, in mesenchymal cell lines (MDA-MB-231 and BT-549) HER2 was able to further increase invasive potential. No changes were found in cancer stem cell characteristics or in response to chemotherapy, a trait of TNBC. When treated with anti-HER2 agents, however, HER2 overexpressing TNBC cells showed increased sensitivity to these agents. CONCLUSION This proof-of-principle study demonstrates that reverse engineering of TNBC cells might offer a novel targeted treatment strategy for this most aggressive subtype of breast cancer.
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Fuentes NR, Salinas ML, Kim E, Chapkin RS. Emerging role of chemoprotective agents in the dynamic shaping of plasma membrane organization. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2017; 1859:1668-1678. [PMID: 28342710 PMCID: PMC5501766 DOI: 10.1016/j.bbamem.2017.03.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Revised: 03/15/2017] [Accepted: 03/19/2017] [Indexed: 12/22/2022]
Abstract
In the context of an organism, epithelial cells by nature are designed to be the defining barrier between self and the outside world. This is especially true for the epithelial cells that form the lining of the digestive tract, which absorb nutrients and serve as a barrier against harmful substances. These cells are constantly bathed by a complex mixture of endogenous (bile acids, mucus, microbial metabolites) and exogenous (food, nutrients, drugs) bioactive compounds. From a cell biology perspective, this type of exposure would directly impact the plasma membrane, which consists of a myriad of complex lipids and proteins. The plasma membrane not only functions as a barrier but also as the medium in which cellular signaling complexes form and function. This property is mediated by the organization of the plasma membrane, which is exquisitely temporally (nanoseconds to minutes) and spatially (nanometers to micrometers) regulated. Since numerous bioactive compounds found in the intestinal lumen can directly interact with lipid membranes, we hypothesize that the dynamic reshaping of plasma membrane organization underlies the chemoprotective effect of select membrane targeted dietary bioactives (MTDBs). This article is part of a Special Issue entitled: Membrane Lipid Therapy: Drugs Targeting Biomembranes edited by Pablo V. Escribá.
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Affiliation(s)
- Natividad R Fuentes
- Program in Integrative Nutrition & Complex Diseases, Texas A&M University, USA; Faculty of Toxicology, Texas A&M University, USA
| | - Michael L Salinas
- Program in Integrative Nutrition & Complex Diseases, Texas A&M University, USA; Department of Nutrition & Food Science, Texas A&M University, USA
| | - Eunjoo Kim
- Program in Integrative Nutrition & Complex Diseases, Texas A&M University, USA; Department of Molecular and Cellular Medicine, Texas A&M University, USA
| | - Robert S Chapkin
- Program in Integrative Nutrition & Complex Diseases, Texas A&M University, USA; Faculty of Toxicology, Texas A&M University, USA; Department of Nutrition & Food Science, Texas A&M University, USA; Center for Translational Environmental Health Research, Texas A&M University, USA.
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Distinct ErbB2 receptor populations differentially interact with beta1 integrin in breast cancer cell models. PLoS One 2017; 12:e0174230. [PMID: 28306722 PMCID: PMC5357064 DOI: 10.1371/journal.pone.0174230] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 03/05/2017] [Indexed: 11/30/2022] Open
Abstract
ErbB2 is a member of the ErbB family of tyrosine kinase receptors that plays a major role in breast cancer progression. Located at the plasma membrane, ErbB2 forms large clusters in spite of the presence of growth factors. Beta1 integrin, membrane receptor of extracellular matrix proteins, regulates adhesion, migration and invasiveness of breast cancer cells. Physical interaction between beta1 integrin and ErbB2 has been suggested although published data are contradictory. The aim of the present work was to study the interaction between ErbB2 and beta1 integrin in different scenarios of expression and activation. We determined that beta1 integrin and ErbB2 colocalization is dependent on the expression level of both receptors exclusively in adherent cells. In suspension cells, lack of focal adhesions leave integrins free to diffuse on the plasma membrane and interact with ErbB2 even at low expression levels of both receptors. In adherent cells, high expression of beta1 integrin leaves unbound receptors outside focal complexes that diffuse within the plasma membrane and interact with ErbB2 membrane domains. Superresolution imaging showed the existence of two distinct populations of ErbB2: a major population located in large clusters and a minor population outside these structures. Upon ErbB2 overexpression, receptors outside large clusters can freely diffuse at the membrane and interact with integrins. These results reveal how expression levels of beta1 integrin and ErbB2 determine their frequency of colocalization and show that extracellular matrix proteins shape membrane clusters distribution, regulating ErbB2 and beta1 integrin activity in breast cancer cells.
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Zhang Y, Xu J, Lou Y, Hu S, Yu K, Li R, Zhang X, Jin B, Han B. Pretreatment direct bilirubin and total cholesterol are significant predictors of overall survival in advanced non-small-cell lung cancer patients with EGFR mutations. Int J Cancer 2017; 140:1645-1652. [PMID: 28006834 DOI: 10.1002/ijc.30581] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2016] [Revised: 12/03/2016] [Accepted: 12/13/2016] [Indexed: 01/22/2023]
Affiliation(s)
- Yanwei Zhang
- Department of Pulmonary Medicine; Shanghai Chest Hospital, Shanghai Jiao Tong University; Shanghai People's Republic of China
| | - Jianlin Xu
- Department of Pulmonary Medicine; Shanghai Chest Hospital, Shanghai Jiao Tong University; Shanghai People's Republic of China
| | - Yuqing Lou
- Department of Pulmonary Medicine; Shanghai Chest Hospital, Shanghai Jiao Tong University; Shanghai People's Republic of China
| | - Song Hu
- Department of Research Center; Shanghai Chest Hospital, Shanghai Jiao Tong University; Shanghai People's Republic of China
| | - Keke Yu
- Department of Biobank; Shanghai Chest Hospital, Shanghai Jiao Tong University; Shanghai People's Republic of China
| | - Rong Li
- Department of Pulmonary Medicine; Shanghai Chest Hospital, Shanghai Jiao Tong University; Shanghai People's Republic of China
| | - Xueyan Zhang
- Department of Pulmonary Medicine; Shanghai Chest Hospital, Shanghai Jiao Tong University; Shanghai People's Republic of China
| | - Bo Jin
- Department of Pulmonary Medicine; Shanghai Chest Hospital, Shanghai Jiao Tong University; Shanghai People's Republic of China
| | - Baohui Han
- Department of Pulmonary Medicine; Shanghai Chest Hospital, Shanghai Jiao Tong University; Shanghai People's Republic of China
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Lucarelli S, Delos Santos RC, Antonescu CN. Measurement of Epidermal Growth Factor Receptor-Derived Signals Within Plasma Membrane Clathrin Structures. Methods Mol Biol 2017; 1652:191-225. [PMID: 28791645 DOI: 10.1007/978-1-4939-7219-7_15] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The epidermal growth factor (EGF) receptor (EGFR) is an important regulator of cell growth, proliferation, survival, migration, and metabolism. EGF binding to EGFR triggers the activation of the receptor's intrinsic kinase activity, in turn eliciting the recruitment of many secondary signaling proteins and activation of downstream signals, such as the activation of phosphatidylinositol-3-kinase (PI3K) and Akt, a process requiring the phosphorylation of Gab1. While the identity of many signals that can be activated by EGFR has been revealed, how the spatiotemporal organization of EGFR signaling within cells controls receptor outcome remains poorly understood. Upon EGF binding at the plasma membrane, EGFR is internalized by clathrin-mediated endocytosis following recruitment to clathrin-coated pits (CCPs). Further, plasma membrane CCPs, but not EGFR internalization, are required for EGF-stimulated Akt phosphorylation. Signaling intermediates such as phosphorylated Gab1, which lead to Akt phosphorylation, are enriched within CCPs upon EGF stimulation. These findings indicate that some plasma membrane CCPs also serve as signaling microdomains required for certain facets of EGFR signaling and are enriched in key EGFR signaling intermediates. Understanding how the spatiotemporal organization of EGFR signals within CCP microdomains controls receptor signaling outcome requires imaging methods that can systematically resolve and analyze the properties of CCPs, EGFR and key signaling intermediates. Here, we describe methods using total internal reflection fluorescence microscopy imaging and analysis to systematically study the enrichment of EGFR and key EGFR-derived signals within CCPs.
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Affiliation(s)
- Stefanie Lucarelli
- Department of Chemistry and Biology, Ryerson University, 350 Victoria Street, Toronto, ON, Canada, M5B 2K3.,Graduate Program in Molecular Science, Ryerson University, 350 Victoria Street, Toronto, ON, Canada, M5B 2K3
| | - Ralph Christian Delos Santos
- Department of Chemistry and Biology, Ryerson University, 350 Victoria Street, Toronto, ON, Canada, M5B 2K3.,Graduate Program in Molecular Science, Ryerson University, 350 Victoria Street, Toronto, ON, Canada, M5B 2K3
| | - Costin N Antonescu
- Department of Chemistry and Biology, Ryerson University, 350 Victoria Street, Toronto, ON, Canada, M5B 2K3. .,Graduate Program in Molecular Science, Ryerson University, 350 Victoria Street, Toronto, ON, Canada, M5B 2K3. .,Keenan Research Centre for Biomedical Science of St. Michael's Hospital, 30 Bond Street, Toronto, ON, Canada, M5B 1W8.
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Cell membrane modulation as adjuvant in cancer therapy. Cancer Treat Rev 2016; 52:48-57. [PMID: 27889637 DOI: 10.1016/j.ctrv.2016.10.008] [Citation(s) in RCA: 235] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 10/24/2016] [Accepted: 10/27/2016] [Indexed: 12/25/2022]
Abstract
Cancer is a complex disease involving numerous biological processes, which can exist in parallel, can be complementary, or are engaged when needed and as such can replace each other. This redundancy in possibilities cancer cells have, are fundamental to failure of therapy. However, intrinsic features of tumor cells and tumors as a whole provide also opportunities for therapy. Here we discuss the unique and specific makeup and arrangement of cell membranes of tumor cells and how these may help treatment. Interestingly, knowledge on cell membranes and associated structures is present already for decades, while application of membrane modification and manipulation as part of cancer therapy is lagging. Recent developments of scientific tools concerning lipids and lipid metabolism, opened new and previously unknown aspects of tumor cells and indicate possible differences in lipid composition and membrane function of tumor cells compared to healthy cells. This field, coined Lipidomics, demonstrates the importance of lipid components in cell membrane in several illnesses. Important alterations in cancer, and specially in resistant cancer cells compared to normal cells, opened the door to new therapeutic strategies. Moreover, the ability to modulate membrane components and/or properties has become a reality. Here, developments in cancer-related Lipidomics and strategies to interfere specifically with cancer cell membranes and how these affect cancer treatment are discussed. We hypothesize that combination of lipid or membrane targeted strategies with available care to improve chemotherapy, radiotherapy and immunotherapy will bring the much needed change in treatment in the years to come.
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75
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Zhang Z, Wang L, Du J, Li Y, Yang H, Li C, Li H, Hu H. Lipid raft localization of epidermal growth factor receptor alters matrix metalloproteinase-1 expression in SiHa cells via the MAPK/ERK signaling pathway. Oncol Lett 2016; 12:4991-4998. [PMID: 28101233 PMCID: PMC5228301 DOI: 10.3892/ol.2016.5307] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2015] [Accepted: 10/03/2016] [Indexed: 12/30/2022] Open
Abstract
Matrix metalloproteinase-1 (MMP-1) has been identified as an important participant in tumor invasion, metastasis and angiogenesis. The purpose of the present study was to investigate the effects of epidermal growth factor receptor (EGFR) localization to lipid rafts on signaling pathways involved in the regulation of MMP-1 expression in SiHa cells, a cervical cancer cell line. EGFR activation by EGF specifically induced MMP-1 expression at both the messenger RNA and protein levels. Additionally, it was observed that EGFR localized to lipid rafts, and that the redistribution of EGFR induced by lipid raft disruption strengthened EGF-induced MMP-1 expression. MMP-1 induction was blocked by the mitogen-activated protein kinase (MAPK) kinase inhibitors PD98059 and U0126. Our results suggested that lipid rafts provide a platform to inhibit EGFR regulation of MMP-1 in SiHa cells through the MAPK/extracellular signal-regulated kinase signaling pathway.
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Affiliation(s)
- Zongfeng Zhang
- Department of Obstetrics and Gynecology, Second Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China
| | - Lina Wang
- Department of Obstetrics and Gynecology, Second Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China
| | - Juan Du
- Department of Obstetrics and Gynecology, Second Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China
| | - Yuanbo Li
- Department of Obstetrics and Gynecology, Second Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China
| | - Huilun Yang
- Department of Obstetrics and Gynecology, Second Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China
| | - Chenxi Li
- Department of Obstetrics and Gynecology, Second Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China
| | - Hui Li
- Department of Obstetrics and Gynecology, Second Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China
| | - Haiyang Hu
- Department of Obstetrics and Gynecology, Second Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China
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76
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Igal RA. Stearoyl CoA desaturase-1: New insights into a central regulator of cancer metabolism. Biochim Biophys Acta Mol Cell Biol Lipids 2016; 1861:1865-1880. [PMID: 27639967 DOI: 10.1016/j.bbalip.2016.09.009] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 08/22/2016] [Accepted: 09/11/2016] [Indexed: 12/24/2022]
Abstract
The processes of cell proliferation, cell death and differentiation involve an intricate array of biochemical and morphological changes that require a finely tuned modulation of metabolic pathways, chiefly among them is fatty acid metabolism. The critical participation of stearoyl CoA desaturase-1 (SCD1), the fatty acyl Δ9-desaturing enzyme that converts saturated fatty acids (SFA) into monounsaturated fatty acids (MUFA), in the mechanisms of replication and survival of mammalian cells, as well as their implication in the biological alterations of cancer have been actively investigated in recent years. This review examines the growing body of evidence that argues for a role of SCD1 as a central regulator of the complex synchronization of metabolic and signaling events that control cellular metabolism, cell cycle progression, survival, differentiation and transformation to cancer.
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Affiliation(s)
- R Ariel Igal
- Institute of Human Nutrition and Department of Pediatrics, Columbia University Medical Center, New York City, NY, United States.
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77
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Shah AD, Inder KL, Shah AK, Cristino AS, McKie AB, Gabra H, Davis MJ, Hill MM. Integrative Analysis of Subcellular Quantitative Proteomics Studies Reveals Functional Cytoskeleton Membrane-Lipid Raft Interactions in Cancer. J Proteome Res 2016; 15:3451-3462. [PMID: 27384440 DOI: 10.1021/acs.jproteome.5b01035] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Lipid rafts are dynamic membrane microdomains that orchestrate molecular interactions and are implicated in cancer development. To understand the functions of lipid rafts in cancer, we performed an integrated analysis of quantitative lipid raft proteomics data sets modeling progression in breast cancer, melanoma, and renal cell carcinoma. This analysis revealed that cancer development is associated with increased membrane raft-cytoskeleton interactions, with ∼40% of elevated lipid raft proteins being cytoskeletal components. Previous studies suggest a potential functional role for the raft-cytoskeleton in the action of the putative tumor suppressors PTRF/Cavin-1 and Merlin. To extend the observation, we examined lipid raft proteome modulation by an unrelated tumor suppressor opioid binding protein cell-adhesion molecule (OPCML) in ovarian cancer SKOV3 cells. In agreement with the other model systems, quantitative proteomics revealed that 39% of OPCML-depleted lipid raft proteins are cytoskeletal components, with microfilaments and intermediate filaments specifically down-regulated. Furthermore, protein-protein interaction network and simulation analysis showed significantly higher interactions among cancer raft proteins compared with general human raft proteins. Collectively, these results suggest increased cytoskeleton-mediated stabilization of lipid raft domains with greater molecular interactions as a common, functional, and reversible feature of cancer cells.
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Affiliation(s)
- Anup D Shah
- The University of Queensland Diamantina Institute, The University of Queensland , Translational Research Institute, Brisbane, Queensland 4102, Australia
| | - Kerry L Inder
- The University of Queensland Diamantina Institute, The University of Queensland , Translational Research Institute, Brisbane, Queensland 4102, Australia
| | - Alok K Shah
- The University of Queensland Diamantina Institute, The University of Queensland , Translational Research Institute, Brisbane, Queensland 4102, Australia
| | - Alexandre S Cristino
- The University of Queensland Diamantina Institute, The University of Queensland , Translational Research Institute, Brisbane, Queensland 4102, Australia
| | - Arthur B McKie
- Ovarian Cancer Action Research Centre, Department of Surgery and Cancer, Imperial College London Hammersmith Campus , London W12 0NN, United Kingdom
| | - Hani Gabra
- Ovarian Cancer Action Research Centre, Department of Surgery and Cancer, Imperial College London Hammersmith Campus , London W12 0NN, United Kingdom
| | - Melissa J Davis
- Division of Bioinformatics, The Walter and Eliza Hall Institute of Medical Research , 1G Royal Parade, Parkville Victoria 3052, Australia
| | - Michelle M Hill
- The University of Queensland Diamantina Institute, The University of Queensland , Translational Research Institute, Brisbane, Queensland 4102, Australia
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78
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Jayathilake AG, Senior PV, Su XQ. Krill oil extract suppresses cell growth and induces apoptosis of human colorectal cancer cells. Altern Ther Health Med 2016; 16:328. [PMID: 27576529 PMCID: PMC5004275 DOI: 10.1186/s12906-016-1311-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Accepted: 08/23/2016] [Indexed: 12/31/2022]
Abstract
Background Colorectal cancer (CRC) is the third most common cancer in the world. The current available treatments for CRC include surgery, chemotherapy and radiotherapy. However, surgery is only useful when the disease is diagnosed at the earlier stage. Chemotherapy and radiotherapy are associated with numerous side effects that decrease the patients’ quality of life. Safer, effective alternatives, such as natural compounds, to chemotherapy are desirable. This study assessed the efficacy of free fatty acid (FFA) extract of krill oil on three human CRC cells lines. Methods HCT-15, SW-480 and Caco-2 cells were treated with the FFA extracts of krill oil and fish oil for 48 h while treatments with the bioactive omega-3 polyunsaturated fatty acids (LC n-3 PUFA) of these marine oils, eicosapentaenoic acid (EPA, C20:5n-3) and docosahexaenoic acid (DHA, C22:6n-3) in comparison with a n-6 PUFA, arachnoid acid (AA, C20:4n-6) were up to 72 h at the concentrations of 50, 100, 150 and 200 μM. Effects of all the treatments on cell proliferation were assessed using a water-soluble tetrazolium-1 (WST-1) assay kit at 24, 48 and 72 h. Effects of FFA extract of krill oil and EPA on apoptosis and mitochondrial membrane potential were determined using commercial kits after 48 h of treatment. Results Krill oil extract inhibited cell proliferation of all three cell lines in the similar manner as fish oil extract. A significant cell apoptosis and increase in mitochondrial membrane potential were observed after the treatment with krill oil extract. EPA at the concentration of 200 μM reduced significantly the proliferation of HCT-15 and SW-480 at 24, 48 and 72 h. In addition, EPA treatment (100 and 200 μM) resulted in significant cell apoptosis in all three cell lines. No significant changes were observed after treatment with DHA and AA. Conclusions Our results indicate that the FFA extract of krill oil maybe an effective chemotherapeutic agent to suppress proliferation and induce apoptosis in CRC cells through its bioactive constitute EPA. Although the exact mechanism of the pro-apoptotic properties of krill oil extract is unclear, mitochondrial pathway seems to be implicated.
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79
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Chen J, Zeng F, Forrester SJ, Eguchi S, Zhang MZ, Harris RC. Expression and Function of the Epidermal Growth Factor Receptor in Physiology and Disease. Physiol Rev 2016; 96:1025-1069. [DOI: 10.1152/physrev.00030.2015] [Citation(s) in RCA: 103] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The epidermal growth factor receptor (EGFR) is the prototypical member of a family of membrane-associated intrinsic tyrosine kinase receptors, the ErbB family. EGFR is activated by multiple ligands, including EGF, transforming growth factor (TGF)-α, HB-EGF, betacellulin, amphiregulin, epiregulin, and epigen. EGFR is expressed in multiple organs and plays important roles in proliferation, survival, and differentiation in both development and normal physiology, as well as in pathophysiological conditions. In addition, EGFR transactivation underlies some important biologic consequences in response to many G protein-coupled receptor (GPCR) agonists. Aberrant EGFR activation is a significant factor in development and progression of multiple cancers, which has led to development of mechanism-based therapies with specific receptor antibodies and tyrosine kinase inhibitors. This review highlights the current knowledge about mechanisms and roles of EGFR in physiology and disease.
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Affiliation(s)
- Jianchun Chen
- Departments of Medicine, Cancer Biology, and Molecular Physiology and Biophysics, Vanderbilt University School of Medicine and Nashville Veterans Affairs Hospital, Nashville, Tennessee; and Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania
| | - Fenghua Zeng
- Departments of Medicine, Cancer Biology, and Molecular Physiology and Biophysics, Vanderbilt University School of Medicine and Nashville Veterans Affairs Hospital, Nashville, Tennessee; and Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania
| | - Steven J. Forrester
- Departments of Medicine, Cancer Biology, and Molecular Physiology and Biophysics, Vanderbilt University School of Medicine and Nashville Veterans Affairs Hospital, Nashville, Tennessee; and Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania
| | - Satoru Eguchi
- Departments of Medicine, Cancer Biology, and Molecular Physiology and Biophysics, Vanderbilt University School of Medicine and Nashville Veterans Affairs Hospital, Nashville, Tennessee; and Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania
| | - Ming-Zhi Zhang
- Departments of Medicine, Cancer Biology, and Molecular Physiology and Biophysics, Vanderbilt University School of Medicine and Nashville Veterans Affairs Hospital, Nashville, Tennessee; and Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania
| | - Raymond C. Harris
- Departments of Medicine, Cancer Biology, and Molecular Physiology and Biophysics, Vanderbilt University School of Medicine and Nashville Veterans Affairs Hospital, Nashville, Tennessee; and Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania
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80
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Hashimoto A, Oikawa T, Hashimoto S, Sugino H, Yoshikawa A, Otsuka Y, Handa H, Onodera Y, Nam JM, Oneyama C, Okada M, Fukuda M, Sabe H. P53- and mevalonate pathway-driven malignancies require Arf6 for metastasis and drug resistance. J Cell Biol 2016; 213:81-95. [PMID: 27044891 PMCID: PMC4828690 DOI: 10.1083/jcb.201510002] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 03/04/2016] [Indexed: 12/18/2022] Open
Abstract
Drug resistance, metastasis, and a mesenchymal transcriptional program are central features of aggressive breast tumors. The GTPase Arf6, often overexpressed in tumors, is critical to promote epithelial-mesenchymal transition and invasiveness. The metabolic mevalonate pathway (MVP) is associated with tumor invasiveness and known to prenylate proteins, but which prenylated proteins are critical for MVP-driven cancers is unknown. We show here that MVP requires the Arf6-dependent mesenchymal program. The MVP enzyme geranylgeranyl transferase II (GGT-II) and its substrate Rab11b are critical for Arf6 trafficking to the plasma membrane, where it is activated by receptor tyrosine kinases. Consistently, mutant p53, which is known to support tumorigenesis via MVP, promotes Arf6 activation via GGT-II and Rab11b. Inhibition of MVP and GGT-II blocked invasion and metastasis and reduced cancer cell resistance against chemotherapy agents, but only in cells overexpressing Arf6 and components of the mesenchymal program. Overexpression of Arf6 and mesenchymal proteins as well as enhanced MVP activity correlated with poor patient survival. These results provide insights into the molecular basis of MVP-driven malignancy.
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Affiliation(s)
- Ari Hashimoto
- Department of Molecular Biology, Graduate School of Medicine, Hokkaido University, Sapporo 060-8638, Japan
| | - Tsukasa Oikawa
- Department of Molecular Biology, Graduate School of Medicine, Hokkaido University, Sapporo 060-8638, Japan
| | - Shigeru Hashimoto
- Department of Molecular Biology, Graduate School of Medicine, Hokkaido University, Sapporo 060-8638, Japan
| | - Hirokazu Sugino
- Department of Molecular Biology, Graduate School of Medicine, Hokkaido University, Sapporo 060-8638, Japan
| | - Ayumu Yoshikawa
- Department of Molecular Biology, Graduate School of Medicine, Hokkaido University, Sapporo 060-8638, Japan
| | - Yutaro Otsuka
- Department of Molecular Biology, Graduate School of Medicine, Hokkaido University, Sapporo 060-8638, Japan
| | - Haruka Handa
- Department of Molecular Biology, Graduate School of Medicine, Hokkaido University, Sapporo 060-8638, Japan
| | - Yasuhito Onodera
- Department of Molecular Biology, Graduate School of Medicine, Hokkaido University, Sapporo 060-8638, Japan
| | - Jin-Min Nam
- Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo 060-8638, Japan
| | - Chitose Oneyama
- Institute for Microbial Diseases, Osaka University, Osaka 565-0871, Japan
| | - Masato Okada
- Institute for Microbial Diseases, Osaka University, Osaka 565-0871, Japan
| | - Mitsunori Fukuda
- Department of Developmental Biology and Neurosciences, Graduate School of Life Sciences, Tohoku University, Sendai 980-8578, Japan
| | - Hisataka Sabe
- Department of Molecular Biology, Graduate School of Medicine, Hokkaido University, Sapporo 060-8638, Japan
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81
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Wang Y, Li X, Sun L, Feng B, Sun W. Acid sphingomyelinase mediates 50-Hz magnetic field-induced EGF receptor clustering on lipid raft. J Recept Signal Transduct Res 2016; 36:593-600. [DOI: 10.3109/10799893.2016.1147583] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Yong Wang
- Bioelectromagnetics Key Laboratory, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People’s Republic of China,
| | - Xingwen Li
- Bioelectromagnetics Key Laboratory, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People’s Republic of China,
- Cixi Sanitary Supervision Station, Cixi, People’s Republic of China,
| | - Liyuan Sun
- Bioelectromagnetics Key Laboratory, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People’s Republic of China,
- The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People’s Republic of China,
| | - Baihuan Feng
- Bioelectromagnetics Key Laboratory, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People’s Republic of China,
| | - Wenjun Sun
- Bioelectromagnetics Key Laboratory, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People’s Republic of China,
- Institute of Environmental Medicine, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People’s Republic of China
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82
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Lv Y, Miao LY, Chen QF, Li Y, Shi ZX, Ding XS. Monitoring of high-density lipoprotein cholesterol level is predictive of EGFR mutation and efficacy of EGFR-TKI in patients with advanced lung adenocarcinoma. Onco Targets Ther 2016; 9:461-8. [PMID: 26858527 PMCID: PMC4730999 DOI: 10.2147/ott.s96199] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
High-density lipoprotein cholesterol (HDL-C) has an inverse association with the incidence of lung cancer. However, whether it can be used as a predictive factor in advanced lung adenocarcinoma patients treated with epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors (TKI) still remains undefined. This research aimed at studying the relationship of serum HDL-C baseline level and HDL-C kinetics to EGFR mutation, the efficacy of EGFR-TKI, and the predictive value of PFS. The presence of mutation rate in the 192 patients with lung adenocarcinoma was compared within stratified groups. Levels of baseline HDL-C and kinetics of HDL-C were analyzed retrospectively in patients treated with EGFR-TKI harboring EGFR mutation. Univariate and multivariate analyses were performed to investigate the prognostic value of HDL-C. EGFR mutation rate of HDL-C high-level group was significantly higher than that of low-level group (59.0% vs 35.6%, P=0.001). Multivariate logistic analysis showed that high-level HDL-C was an independent predictive factor for EGFR gene mutation (P=0.005; odds ratio =0.417; 95% confidence interval [CI], 0.227–0.768). Patients with a low level of HDL-C before therapy showed a progression of disease in most cases (P<0.001). According to HDL-C kinetics, patients who received EGFR-TKI treatment harboring EGFR mutation were divided into four groups. Univariate analysis showed that patients in nondecreased group had longer progression-free survival (P<0.001; hazard ratio =0.003; 95% CI, 0.001–0.018). Multivariate Cox proportional hazards model analyses showed the same result (P<0.001; hazard ratio =0.003; 95% CI, 0.001–0.018). Current results suggest that HDL-C seems to be a good independent predictive biomarker for advanced lung adenocarcinoma patients treated with the first-line EGFR-TKI. Roles of this biomarker include indicating EGFR mutation, assessing the efficacy of EGFR-TKI, and predicting the progression-free survival.
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Affiliation(s)
- Yang Lv
- Department of Clinical Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, People's Republic of China; Division of Respiratory Medicine, Department of Respiration, The Affiliated Drum Tower Hospital of Nanjing University Medical College, Nanjing University Medical School, Nanjing, Jiangsu, People's Republic of China
| | - Li-Yun Miao
- Division of Respiratory Medicine, Department of Respiration, The Affiliated Drum Tower Hospital of Nanjing University Medical College, Nanjing University Medical School, Nanjing, Jiangsu, People's Republic of China
| | - Qiu-Fang Chen
- Department of Clinical Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, People's Republic of China
| | - Yan Li
- Division of Respiratory Medicine, Department of Respiration, The Affiliated Drum Tower Hospital of Nanjing University Medical College, Nanjing University Medical School, Nanjing, Jiangsu, People's Republic of China
| | - Zhi-Xiang Shi
- Department of Clinical Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, People's Republic of China
| | - Xuan-Sheng Ding
- Department of Clinical Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, People's Republic of China
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83
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Hempel C, Najjar A, Totzke F, Schächtele C, Sippl W, Ritter C, Hilgeroth A. Discovery of dually acting small-molecule inhibitors of cancer-resistance relevant receptor tyrosine kinases EGFR and IGF-1R. MEDCHEMCOMM 2016. [DOI: 10.1039/c6md00329j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Small-molecule inhibitors of cancer-relevant receptor tyrosine kinases EGFR and IGF-1R have been discovered.
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Affiliation(s)
- Cornelius Hempel
- Department of Pharmaceutical Chemistry
- Institute of Pharmacy
- Martin Luther University
- 06120 Halle
- Germany
| | - Abdulkarim Najjar
- Department of Pharmaceutical Chemistry
- Institute of Pharmacy
- Martin Luther University
- 06120 Halle
- Germany
| | | | | | - Wolfgang Sippl
- Department of Pharmaceutical Chemistry
- Institute of Pharmacy
- Martin Luther University
- 06120 Halle
- Germany
| | - Christoph Ritter
- Department of Clinical Pharmacy
- Institute of Pharmacy
- Ernst Moritz Arndt University of Greifswald
- 17489 Greifswald
- Germany
| | - Andreas Hilgeroth
- Department of Pharmaceutical Chemistry
- Institute of Pharmacy
- Martin Luther University
- 06120 Halle
- Germany
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84
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Cardone RA, Greco MR, Zeeberg K, Zaccagnino A, Saccomano M, Bellizzi A, Bruns P, Menga M, Pilarsky C, Schwab A, Alves F, Kalthoff H, Casavola V, Reshkin SJ. A novel NHE1-centered signaling cassette drives epidermal growth factor receptor-dependent pancreatic tumor metastasis and is a target for combination therapy. Neoplasia 2015; 17:155-66. [PMID: 25748234 PMCID: PMC4351296 DOI: 10.1016/j.neo.2014.12.003] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Revised: 12/04/2014] [Accepted: 12/04/2014] [Indexed: 12/21/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is one of the most lethal cancers principally because of early invasion and metastasis. The epidermal growth factor receptor (EGFR) is essential for PDAC development even in the presence of Kras, but its inhibition with erlotinib gives only a modest clinical response, making the discovery of novel EGFR targets of critical interest. Here, we revealed by mining a human pancreatic gene expression database that the metastasis promoter Na+/H+ exchanger (NHE1) associates with the EGFR in PDAC. In human PDAC cell lines, we confirmed that NHE1 drives both basal and EGF-stimulated three-dimensional growth and early invasion via invadopodial extracellular matrix digestion. EGF promoted the complexing of EGFR with NHE1 via the scaffolding protein Na +/H + exchanger regulatory factor 1, engaging EGFR in a negative transregulatory loop that controls the extent and duration of EGFR oncogenic signaling and stimulates NHE1. The specificity of NHE1 for growth or invasion depends on the segregation of the transient EGFR/Na +/H + exchanger regulatory factor 1/NHE1 signaling complex into dimeric subcomplexes in different lipid raftlike membrane domains. This signaling complex was also found in tumors developed in orthotopic mice. Importantly, the specific NHE1 inhibitor cariporide reduced both three-dimensional growth and invasion independently of PDAC subtype and synergistically sensitized these behaviors to low doses of erlotinib.
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Affiliation(s)
- Rosa Angela Cardone
- Department of Biosciences, Biotechnology and Biopharmaceutics, University of Bari, Via E. Orabona 4, 70125, Bari, Italy
| | - Maria Raffaella Greco
- Department of Biosciences, Biotechnology and Biopharmaceutics, University of Bari, Via E. Orabona 4, 70125, Bari, Italy
| | - Katrine Zeeberg
- Department of Biosciences, Biotechnology and Biopharmaceutics, University of Bari, Via E. Orabona 4, 70125, Bari, Italy
| | - Angela Zaccagnino
- Institute for Experimental Cancer Research, Christian Albrechts University, Arnold-Heller-Str. 7, D-24105, Kiel, Germany
| | - Mara Saccomano
- Max-Planck-Institute of Experimental Medicine, Hermann-Rein-Str. 3, D-37075, Gottingen, Germany
| | - Antonia Bellizzi
- Department of Biosciences, Biotechnology and Biopharmaceutics, University of Bari, Via E. Orabona 4, 70125, Bari, Italy
| | - Philipp Bruns
- Institute of Physiology II, University of Muenster, Robert-Koch-Str. 27 b, D-48149, Muenster, Germany
| | - Marta Menga
- Department of Biosciences, Biotechnology and Biopharmaceutics, University of Bari, Via E. Orabona 4, 70125, Bari, Italy
| | - Christian Pilarsky
- University Hospital Carl Gustav Carus, Technical University of Dresden, TU Dresden, Fetscherstraße 74, D-01307, Dresden, Germany
| | - Albrecht Schwab
- Institute of Physiology II, University of Muenster, Robert-Koch-Str. 27 b, D-48149, Muenster, Germany
| | - Frauke Alves
- Max-Planck-Institute of Experimental Medicine, Hermann-Rein-Str. 3, D-37075, Gottingen, Germany
| | - Holger Kalthoff
- Institute for Experimental Cancer Research, Christian Albrechts University, Arnold-Heller-Str. 7, D-24105, Kiel, Germany
| | - Valeria Casavola
- Department of Biosciences, Biotechnology and Biopharmaceutics, University of Bari, Via E. Orabona 4, 70125, Bari, Italy; Centre of Excellence in Comparative Genomics (CEGBA), Bari, Italy
| | - Stephan Joel Reshkin
- Department of Biosciences, Biotechnology and Biopharmaceutics, University of Bari, Via E. Orabona 4, 70125, Bari, Italy; Centre of Excellence in Comparative Genomics (CEGBA), Bari, Italy.
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85
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Schatzlmaier P, Supper V, Göschl L, Zwirzitz A, Eckerstorfer P, Ellmeier W, Huppa JB, Stockinger H. Rapid multiplex analysis of lipid raft components with single-cell resolution. Sci Signal 2015; 8:rs11. [PMID: 26396269 DOI: 10.1126/scisignal.aac5584] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Lipid rafts, a distinct class of highly dynamic cell membrane microdomains, are integral to cell homeostasis, differentiation, and signaling. However, their quantitative examination is challenging when working with rare cells, developmentally heterogeneous cell populations, or molecules that only associate weakly with lipid rafts. We present a fast biochemical method, which is based on lipid raft components associating with the nucleus upon partial lysis during centrifugation through nonionic detergent. Requiring little starting material or effort, our protocol enabled the multidimensional flow cytometric quantitation of raft-resident proteins with single-cell resolution, thereby assessing the membrane components from a few cells in complex cell populations, as well as their dynamics resulting from cell signaling, differentiation, or genetic mutation.
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Affiliation(s)
- Philipp Schatzlmaier
- Institute for Hygiene and Applied Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Lazarettgasse 19, A-1090 Vienna, Austria
| | - Verena Supper
- Institute for Hygiene and Applied Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Lazarettgasse 19, A-1090 Vienna, Austria
| | - Lisa Göschl
- Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Lazarettgasse 19, A-1090 Vienna, Austria. Division of Rheumatology, Department of Internal Medicine III, Medical University of Vienna, Währinger Gürtel 18-20, A-1090 Vienna, Austria
| | - Alexander Zwirzitz
- Institute for Hygiene and Applied Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Lazarettgasse 19, A-1090 Vienna, Austria
| | - Paul Eckerstorfer
- Institute for Hygiene and Applied Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Lazarettgasse 19, A-1090 Vienna, Austria
| | - Wilfried Ellmeier
- Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Lazarettgasse 19, A-1090 Vienna, Austria
| | - Johannes B Huppa
- Institute for Hygiene and Applied Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Lazarettgasse 19, A-1090 Vienna, Austria.
| | - Hannes Stockinger
- Institute for Hygiene and Applied Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Lazarettgasse 19, A-1090 Vienna, Austria.
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Peckys DB, de Jonge N. Studying the Stoichiometry of Epidermal Growth Factor Receptor in Intact Cells using Correlative Microscopy. J Vis Exp 2015. [PMID: 26383083 PMCID: PMC4692600 DOI: 10.3791/53186] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
This protocol describes the labeling of epidermal growth factor receptor (EGFR) on COS7 fibroblast cells, and subsequent correlative fluorescence microscopy and environmental scanning electron microscopy (ESEM) of whole cells in hydrated state. Fluorescent quantum dots (QDs) were coupled to EGFR via a two-step labeling protocol, providing an efficient and specific protein labeling, while avoiding label-induced clustering of the receptor. Fluorescence microscopy provided overview images of the cellular locations of the EGFR. The scanning transmission electron microscopy (STEM) detector was used to detect the QD labels with nanoscale resolution. The resulting correlative images provide data of the cellular EGFR distribution, and the stoichiometry at the single molecular level in the natural context of the hydrated intact cell. ESEM-STEM images revealed the receptor to be present as monomer, as homodimer, and in small clusters. Labeling with two different QDs, i.e., one emitting at 655 nm and at 800 revealed similar characteristic results.
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Affiliation(s)
| | - Niels de Jonge
- INM-Leibniz Institute for New Materials; Department of Physics, University of Saarland;
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87
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Charming neighborhoods on the cell surface: plasma membrane microdomains regulate receptor tyrosine kinase signaling. Cell Signal 2015; 27:1963-76. [PMID: 26163824 DOI: 10.1016/j.cellsig.2015.07.004] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Accepted: 07/07/2015] [Indexed: 12/14/2022]
Abstract
Receptor tyrosine kinases (RTK) are an important family of growth factor and hormone receptors that regulate many aspects of cellular physiology. Ligand binding by RTKs at the plasma membrane elicits activation of many signaling intermediates. The spatial and temporal regulation of RTK signaling within cells is an important determinant of receptor signaling outcome. In particular, the compartmentalization of the plasma membrane into a number of microdomains allows context-specific control of RTK signaling. Indeed various RTKs are recruited to and enriched within specific plasma membrane microdomains under various conditions, including lipid-ordered domains such as caveolae and lipid rafts, clathrin-coated structures, tetraspanin-enriched microdomains, and actin-dependent protrusive membrane microdomains such as dorsal ruffles and invadosomes. We examine the evidence for control of RTK signaling by each of these plasma membrane microdomains, as well as molecular mechanisms for how this spatial organization controls receptor signaling.
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88
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Sheehy RM, Kuder CH, Bachman Z, Hohl RJ. Calcium and P-glycoprotein independent synergism between schweinfurthins and verapamil. Cancer Biol Ther 2015; 16:1259-68. [PMID: 26046259 DOI: 10.1080/15384047.2015.1056420] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Schweinfurthins are intriguing natural products with anti-cancer activities and as yet incompletely understood mechanisms of action. We investigated whether inhibitors of P-glycoprotein (Pgp), in a manner analogous to other natural products, might enhance schweinfurthins' growth inhibitory actions by increasing intracellular schweinfurthin levels. Both the schweinfurthin-sensitive glioblastoma multiforme cell line SF-295 and relatively insensitive lung carcinoma cell line A549 were treated with 2 schweinfurthin analogs: 3-deoxyschweinfurthin B-p-nitro bis-stilbene (3dSB-PNBS) and 5'-methylschweinfurthin G (methyl-G). There was a synergistic enhancement of growth inhibition with the combination of the Pgp inhibitor verapamil and both analogs in SF-295 cells. Methyl-G, verapamil, and the combination did not result in alterations to intracellular calcium concentration. Verapamil increased the intracellular concentration of 3dSB-PNBS in both SF-295 and A549 cells in a Pgp-independent manner. Methyl-G, verapamil, and the combination do not result in increased ER stress. Methyl-G increased the intracellular concentration of a known Pgp substrate, Rhodamine 123 in SF-295 cells. Reduction of cellular cholesterol leads to the accumulation of Pgp substrates, as Pgp requires cholesterol for proper function. Since 3dSB enhances lovastatin-induced upregulation of the cholesterol efflux pump ABCA1, it is intriguing that co-treatment with cholesterol rescued the methyl-G-induced increase in Rhodamine 123 intracellular concentration. These studies support the hypothesis that verapamil potentiates the schweinfurthin growth inhibitory effect by increasing its intracellular concentration.
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Key Words
- 3dSB, 3-deoxyschweinfurthin B
- 3dSB-PNBS, 3-deoxyschweinfurthin B p-nitro bis-stilbene
- BAPTA-AM, 1,2-bis(o-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid
- CI, combination index
- DMP-PNBS, 3,4-dimethoxypheny-p-nitro bis-stilbene
- ER, endoplasmic reticulum
- GBM, Glioblastoma Multiforme
- MTT, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide
- Methyl-G, 5'-methoxyschweinfurthin G
- NCI, National Cancer Institute
- PARP, poly-ADP-ribose polymerase
- Pgp, P-glycoprotein drug efflux pump
- cholesterol metabolism
- drug efflux pump
- glioblastoma multiforme
- oxysterol binding protein
- p-glycoprotein
- schweinfurthin
- verapamil
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Affiliation(s)
- Ryan M Sheehy
- a Department of Pharmacology ; University of Iowa ; Iowa City , IA USA
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89
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BELIZZI ANTONIA, GRECO MARIARAFFAELLA, RUBINO ROSA, PARADISO ANGELO, FORCINITI STEFANIA, ZEEBERG KATRINE, CARDONE ROSAANGELA, RESHKIN STEPHANJOEL. The scaffolding protein NHERF1 sensitizes EGFR-dependent tumor growth, motility and invadopodia function to gefitinib treatment in breast cancer cells. Int J Oncol 2014; 46:1214-24. [DOI: 10.3892/ijo.2014.2805] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 11/26/2014] [Indexed: 11/06/2022] Open
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90
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Shah A, Chen D, Boda AR, Foster LJ, Davis MJ, Hill MM. RaftProt: mammalian lipid raft proteome database. Nucleic Acids Res 2014; 43:D335-8. [PMID: 25392410 PMCID: PMC4383944 DOI: 10.1093/nar/gku1131] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
RaftProt (http://lipid-raft-database.di.uq.edu.au/) is a database of mammalian lipid raft-associated proteins as reported in high-throughput mass spectrometry studies. Lipid rafts are specialized membrane microdomains enriched in cholesterol and sphingolipids thought to act as dynamic signalling and sorting platforms. Given their fundamental roles in cellular regulation, there is a plethora of information on the size, composition and regulation of these membrane microdomains, including a large number of proteomics studies. To facilitate the mining and analysis of published lipid raft proteomics studies, we have developed a searchable database RaftProt. In addition to browsing the studies, performing basic queries by protein and gene names, searching experiments by cell, tissue and organisms; we have implemented several advanced features to facilitate data mining. To address the issue of potential bias due to biochemical preparation procedures used, we have captured the lipid raft preparation methods and implemented advanced search option for methodology and sample treatment conditions, such as cholesterol depletion. Furthermore, we have identified a list of high confidence proteins, and enabled searching only from this list of likely bona fide lipid raft proteins. Given the apparent biological importance of lipid raft and their associated proteins, this database would constitute a key resource for the scientific community.
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Affiliation(s)
- Anup Shah
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
| | - David Chen
- School of Information and Communication Technology, Griffith University, Brisbane, QLD, Australia
| | - Akash R Boda
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
| | - Leonard J Foster
- Centre for High-Throughput Biology, University of British Columbia, British Columbia, Canada
| | - Melissa J Davis
- Systems Biology Laboratory, Melbourne School of Engineering, The University of Melbourne, Parkville, VIC, Australia
| | - Michelle M Hill
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
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91
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Guéguinou M, Gambade A, Félix R, Chantôme A, Fourbon Y, Bougnoux P, Weber G, Potier-Cartereau M, Vandier C. Lipid rafts, KCa/ClCa/Ca2+ channel complexes and EGFR signaling: Novel targets to reduce tumor development by lipids? BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1848:2603-20. [PMID: 25450343 DOI: 10.1016/j.bbamem.2014.10.036] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 10/15/2014] [Accepted: 10/22/2014] [Indexed: 12/29/2022]
Abstract
Membrane lipid rafts are distinct plasma membrane nanodomains that are enriched with cholesterol, sphingolipids and gangliosides, with occasional presence of saturated fatty acids and phospholipids containing saturated acyl chains. It is well known that they organize receptors (such as Epithelial Growth Factor Receptor), ion channels and their downstream acting molecules to regulate intracellular signaling pathways. Among them are Ca2+ signaling pathways, which are modified in tumor cells and inhibited upon membrane raft disruption. In addition to protein components, lipids from rafts also contribute to the organization and function of Ca2+ signaling microdomains. This article aims to focus on the lipid raft KCa/ClCa/Ca2+ channel complexes that regulate Ca2+ and EGFR signaling in cancer cells, and discusses the potential modification of these complexes by lipids as a novel therapeutic approach in tumor development. This article is part of a Special Issue entitled: Membrane channels and transporters in cancers.
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Affiliation(s)
- Maxime Guéguinou
- Inserm, UMR1069, Nutrition, Croissance et Cancer, Tours F-37032, France; Université François Rabelais, Tours F-37032, France
| | - Audrey Gambade
- Inserm, UMR1069, Nutrition, Croissance et Cancer, Tours F-37032, France; Université François Rabelais, Tours F-37032, France
| | - Romain Félix
- Inserm, UMR1069, Nutrition, Croissance et Cancer, Tours F-37032, France; Université François Rabelais, Tours F-37032, France
| | - Aurélie Chantôme
- Inserm, UMR1069, Nutrition, Croissance et Cancer, Tours F-37032, France; Université François Rabelais, Tours F-37032, France
| | - Yann Fourbon
- Inserm, UMR1069, Nutrition, Croissance et Cancer, Tours F-37032, France; Université François Rabelais, Tours F-37032, France
| | - Philippe Bougnoux
- Inserm, UMR1069, Nutrition, Croissance et Cancer, Tours F-37032, France; Université François Rabelais, Tours F-37032, France; Centre HS Kaplan, CHRU Tours, Tours F-37032, France
| | - Günther Weber
- Inserm, UMR1069, Nutrition, Croissance et Cancer, Tours F-37032, France; Université François Rabelais, Tours F-37032, France
| | - Marie Potier-Cartereau
- Inserm, UMR1069, Nutrition, Croissance et Cancer, Tours F-37032, France; Université François Rabelais, Tours F-37032, France
| | - Christophe Vandier
- Inserm, UMR1069, Nutrition, Croissance et Cancer, Tours F-37032, France; Université François Rabelais, Tours F-37032, France.
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92
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Recktenwald CV, Lichtenfels R, Wulfaenger J, Müller A, Dressler SP, Seliger B. Impact of the mitogen-activated protein kinase pathway on the subproteome of detergent-resistant microdomains of colon carcinoma cells. Proteomics 2014; 15:77-88. [PMID: 25359454 DOI: 10.1002/pmic.201300321] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 09/10/2014] [Accepted: 10/27/2014] [Indexed: 11/10/2022]
Abstract
Lipid rafts play a key role in the regulation of fundamentally important cellular processes, including cell proliferation, differentiation, and survival. The composition of such detergent-resistant microdomains (DRMs) is altered under pathologic conditions, including cancer. Although DRMs have been analyzed in colorectal carcinoma little information exists about their composition upon treatment with targeted drugs. Hence, a quantitative proteomic profiling approach was performed to define alterations within the DRM fraction of colorectal carcinoma cells upon treatment with the drug U0126, an inhibitor of the mitogen-activated protein kinase pathway. Comparative expression profilings resulted in the identification of 300 proteins, which could partially be linked to key oncogenic signaling pathways and tumor-related cellular features, such as cell proliferation, adhesion, motility, invasion, and apoptosis resistance. Most of these proteins were downregulated upon inhibitor treatment. In addition, quantitative proteomic profilings of cholesterol-depleted versus intact lipid rafts were performed to define, which U0126-regulated target structures represent bona fide raft proteins. Selected differentially abundant raft proteins were validated at the mRNA and/or protein level using U0126- or Trametinib-treated cells. The presented data provide insights into the molecular mechanisms associated with the response to the treatment with MEK inhibitors and might also lead to novel candidates for therapeutic interventions.
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93
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Insights into cardio-oncology: the patient's heavy cancer journey among doubts, controversies and pitfalls. The role of the cardiologist. Int J Cardiol 2014; 178:175-7. [PMID: 25464247 DOI: 10.1016/j.ijcard.2014.10.167] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2014] [Accepted: 10/27/2014] [Indexed: 02/07/2023]
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94
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Zahonero C, Sánchez-Gómez P. EGFR-dependent mechanisms in glioblastoma: towards a better therapeutic strategy. Cell Mol Life Sci 2014; 71:3465-88. [PMID: 24671641 PMCID: PMC11113227 DOI: 10.1007/s00018-014-1608-1] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Revised: 02/06/2014] [Accepted: 03/11/2014] [Indexed: 12/11/2022]
Abstract
Glioblastoma is a particularly resilient cancer, and while therapies may be able to reach the brain by crossing the blood-brain barrier, they then have to deal with a highly invasive tumor that is very resistant to DNA damage. It seems clear that in order to kill aggressive glioma cells more efficiently and with fewer side effects on normal tissue, there must be a shift from classical cytotoxic chemotherapy to more targeted therapies. Since the epidermal growth factor receptor (EGFR) is altered in almost 50% of glioblastomas, it currently represents one of the most promising therapeutic targets. In fact, it has been associated with several distinct steps in tumorigenesis, from tumor initiation to tumor growth and survival, and also with the regulation of cell migration and angiogenesis. However, inhibitors of the EGFR kinase have produced poor results with this type of cancer in clinical trials, with no clear explanation for the tumor resistance observed. Here we will review what we know about the expression and function of EGFR in cancer and in particular in gliomas. We will also evaluate which are the possible molecular and cellular escape mechanisms. As a result, we hope that this review will help improve the design of future EGFR-targeted therapies for glioblastomas.
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Affiliation(s)
- Cristina Zahonero
- Neuro-Oncology Unit, Instituto de Salud Carlos III-UFIEC, Madrid, Spain
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95
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Chapkin RS, DeClercq V, Kim E, Fuentes NR, Fan YY. Mechanisms by Which Pleiotropic Amphiphilic n-3 PUFA Reduce Colon Cancer Risk. CURRENT COLORECTAL CANCER REPORTS 2014; 10:442-452. [PMID: 25400530 DOI: 10.1007/s11888-014-0241-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Colorectal cancer is one of the major causes of cancer-related mortality in both men and women worldwide. Genetic susceptibility and diet are primary determinants of cancer risk and tumor behavior. Experimental, epidemiological, and clinical data substantiate the beneficial role of n-3 polyunsaturated fatty acids (PUFA) in preventing chronic inflammation and colon cancer. From a mechanistic perspective, n-3 PUFA are pleiotropic and multifaceted with respect to their molecular mechanisms of action. For example, this class of dietary lipid uniquely alters membrane structure/ cytoskeletal function, impacting membrane receptor function and downstream signaling cascades, including gene expression profiles and cell phenotype. In addition, n-3 PUFA can synergize with other potential anti-tumor agents, such as fermentable fiber and curcumin. With the rising prevalence of diet-induced obesity, there is also an urgent need to elucidate the link between chronic inflammation in adipose tissue and colon cancer risk in obesity. In this review, we will summarize recent developments linking n-3 PUFA intake, membrane alterations, epigenetic modulation, and effects on obesity-associated colon cancer risk.
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Affiliation(s)
- Robert S Chapkin
- Program in Integrative Nutrition and Complex Diseases, Texas A&M University, College Station, TX 77843, USA. Center for Translational Environmental Health Research, Texas A&M University, College Station, TX 77843, USA. Department of Nutrition and Food Science, Texas A&M University, College Station, TX 77843, USA. Biochemistry & Biophysics, Texas A&M University, College Station, TX 77843, USA. Faculty of Toxicity, Texas A&M University, College Station, TX 77843, USA
| | - Vanessa DeClercq
- Program in Integrative Nutrition and Complex Diseases, Texas A&M University, College Station, TX 77843, USA. Department of Nutrition and Food Science, Texas A&M University, College Station, TX 77843, USA
| | - Eunjoo Kim
- Program in Integrative Nutrition and Complex Diseases, Texas A&M University, College Station, TX 77843, USA. Molecular & Cellular Medicine, Texas A&M University, College Station, TX 77843, USA
| | - Natividad Roberto Fuentes
- Program in Integrative Nutrition and Complex Diseases, Texas A&M University, College Station, TX 77843, USA. Faculty of Toxicity, Texas A&M University, College Station, TX 77843, USA
| | - Yang-Yi Fan
- Program in Integrative Nutrition and Complex Diseases, Texas A&M University, College Station, TX 77843, USA. Department of Nutrition and Food Science, Texas A&M University, College Station, TX 77843, USA
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96
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Patanè S. ERBB1/EGFR and ERBB2 (HER2/neu)--targeted therapies in cancer and cardiovascular system with cardiovascular drugs. Int J Cardiol 2014; 176:1301-3. [PMID: 25131912 DOI: 10.1016/j.ijcard.2014.07.161] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2014] [Accepted: 07/27/2014] [Indexed: 01/08/2023]
Affiliation(s)
- Salvatore Patanè
- Cardiologia Ospedale San Vincenzo - Taormina (Me) Azienda Sanitaria Provinciale di Messina, Contrada Sirina, 98039 Taormina Messina, Italy. patane-@libero.it
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97
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Bansal N, Mims J, Kuremsky JG, Olex AL, Zhao W, Yin L, Wani R, Qian J, Center B, Marrs GS, Porosnicu M, Fetrow JS, Tsang AW, Furdui CM. Broad phenotypic changes associated with gain of radiation resistance in head and neck squamous cell cancer. Antioxid Redox Signal 2014; 21:221-36. [PMID: 24597745 PMCID: PMC4060837 DOI: 10.1089/ars.2013.5690] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
AIMS The central issue of resistance to radiation remains a significant challenge in the treatment of cancer despite improvements in treatment modality and emergence of new therapies. To facilitate the identification of molecular factors that elicit protection against ionizing radiation, we developed a matched model of radiation resistance for head and neck squamous cell cancer (HNSCC) and characterized its properties using quantitative mass spectrometry and complementary assays. RESULTS Functional network analysis of proteomics data identified DNA replication and base excision repair, extracellular matrix-receptor interaction, cell cycle, focal adhesion, and regulation of actin cytoskeleton as significantly up- or downregulated networks in resistant (rSCC-61) HNSCC cells. Upregulated proteins in rSCC-61 included a number of cytokeratins, fatty acid synthase, and antioxidant proteins. In addition, the rSCC-61 cells displayed two unexpected features compared with parental radiation-sensitive SCC-61 cells: (i) rSCC-61 had increased sensitivity to Erlotinib, a small-molecule inhibitor of epidermal growth factor receptor; and (ii) there was evidence of mesenchymal-to-epithelial transition in rSCC-61, confirmed by the expression of protein markers and functional assays (e.g., Vimentin, migration). INNOVATION The matched model of radiation resistance presented here shows that multiple signaling and metabolic pathways converge to produce the rSCC-61 phenotype, and this points to the function of the antioxidant system as a major regulator of resistance to ionizing radiation in rSCC-61, a phenomenon further confirmed by analysis of HNSCC tumor samples. CONCLUSION The rSCC-61/SCC-61 model provides the opportunity for future investigations of the redox-regulated mechanisms of response to combined radiation and Erlotinib in a preclinical setting.
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Affiliation(s)
- Nidhi Bansal
- 1 Section on Molecular Medicine, Department of Internal Medicine, Wake Forest School of Medicine , Winston-Salem, North Carolina
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98
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Reisz JA, Bansal N, Qian J, Zhao W, Furdui CM. Effects of ionizing radiation on biological molecules--mechanisms of damage and emerging methods of detection. Antioxid Redox Signal 2014; 21:260-92. [PMID: 24382094 PMCID: PMC4060780 DOI: 10.1089/ars.2013.5489] [Citation(s) in RCA: 414] [Impact Index Per Article: 41.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Revised: 12/07/2013] [Accepted: 01/01/2014] [Indexed: 12/13/2022]
Abstract
SIGNIFICANCE The detrimental effects of ionizing radiation (IR) involve a highly orchestrated series of events that are amplified by endogenous signaling and culminating in oxidative damage to DNA, lipids, proteins, and many metabolites. Despite the global impact of IR, the molecular mechanisms underlying tissue damage reveal that many biomolecules are chemoselectively modified by IR. RECENT ADVANCES The development of high-throughput "omics" technologies for mapping DNA and protein modifications have revolutionized the study of IR effects on biological systems. Studies in cells, tissues, and biological fluids are used to identify molecular features or biomarkers of IR exposure and response and the molecular mechanisms that regulate their expression or synthesis. CRITICAL ISSUES In this review, chemical mechanisms are described for IR-induced modifications of biomolecules along with methods for their detection. Included with the detection methods are crucial experimental considerations and caveats for their use. Additional factors critical to the cellular response to radiation, including alterations in protein expression, metabolomics, and epigenetic factors, are also discussed. FUTURE DIRECTIONS Throughout the review, the synergy of combined "omics" technologies such as genomics and epigenomics, proteomics, and metabolomics is highlighted. These are anticipated to lead to new hypotheses to understand IR effects on biological systems and improve IR-based therapies.
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Affiliation(s)
- Julie A Reisz
- Section on Molecular Medicine, Department of Internal Medicine, Wake Forest School of Medicine , Winston-Salem, North Carolina
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99
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Dória ML, Ribeiro AS, Wang J, Cotrim CZ, Domingues P, Williams C, Domingues MR, Helguero LA. Fatty acid and phospholipid biosynthetic pathways are regulated throughout mammary epithelial cell differentiation and correlate to breast cancer survival. FASEB J 2014; 28:4247-64. [PMID: 24970396 DOI: 10.1096/fj.14-249672] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This work combined gene and protein expression, gas chromatography-flame ionization detector, and hydrophilic interaction liquid chromatography-tandem mass spectrometry to compare lipid metabolism changes in undifferentiated/proliferating vs. functionally differentiated mammary epithelial cells (MECs) and to study their correlation to breast cancer survival. Sixty-eight genes involved in lipid metabolism were changed in MEC differentiation. Differentiated cells showed induction of Elovl6 (2-fold), Scd1 (4-fold), and Fads2 (2-fold), which correlated with increased levels of C16:1 n-7 and C18:1 n-9 (1.5-fold), C20:3 n-6 (2.5-fold), and C20:4 n-6 (6-fold) fatty acids (FAs) and more phospholipids (PLs) containing these species. Further, increased expression (2- to 3-fold) of genes in phosphatidylethanolamine (PE) de novo biosynthesis resulted in a 20% PE increase. Proliferating/undifferentiated cells showed higher C16:0 (1.7-fold) and C18:2 n-6 (4.2-fold) levels and more PLs containing C16:0 FAs [PC(16:0/16:1), PG(16:0/18:2), PG(16:0/18:1), and SM(16:0/18:0)]. Kaplan-Meier analysis of data from 3455 patients with breast cancer disclosed a positive correlation for 59% of genes expressed in differentiated MECs with better survival. PE biosynthesis and FA oxidation correlated with better prognosis in patients with breast cancer, including the basal-like subtype. Therefore, genes involved in mammary gland FA and PL metabolism and their resulting molecular species reflect the cellular proliferative ability and differentiation state and deserve further studies as potential markers of breast cancer progression
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Affiliation(s)
- M Luisa Dória
- Mass Spectrometry Centre, Organic Chemistry and Natural Products Research Unit, Department of Chemistry, Universidade de Aveiro, Campus de Santiago, Aveiro, Portugal; and
| | - Ana S Ribeiro
- Mass Spectrometry Centre, Organic Chemistry and Natural Products Research Unit, Department of Chemistry, Universidade de Aveiro, Campus de Santiago, Aveiro, Portugal; and
| | - Jun Wang
- Department of Biology and Biochemistry, Center for Nuclear Receptors and Cell Signaling, University of Houston, Houston, Texas, USA
| | - Cândida Z Cotrim
- Mass Spectrometry Centre, Organic Chemistry and Natural Products Research Unit, Department of Chemistry, Universidade de Aveiro, Campus de Santiago, Aveiro, Portugal; and
| | - Pedro Domingues
- Mass Spectrometry Centre, Organic Chemistry and Natural Products Research Unit, Department of Chemistry, Universidade de Aveiro, Campus de Santiago, Aveiro, Portugal; and
| | - Cecilia Williams
- Department of Biology and Biochemistry, Center for Nuclear Receptors and Cell Signaling, University of Houston, Houston, Texas, USA
| | - M Rosário Domingues
- Mass Spectrometry Centre, Organic Chemistry and Natural Products Research Unit, Department of Chemistry, Universidade de Aveiro, Campus de Santiago, Aveiro, Portugal; and
| | - Luisa A Helguero
- Mass Spectrometry Centre, Organic Chemistry and Natural Products Research Unit, Department of Chemistry, Universidade de Aveiro, Campus de Santiago, Aveiro, Portugal; and
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Xu L, Qu X, Li H, Li C, Liu J, Zheng H, Liu Y. Src/caveolin-1-regulated EGFR activation antagonizes TRAIL-induced apoptosis in gastric cancer cells. Oncol Rep 2014; 32:318-24. [PMID: 24840271 DOI: 10.3892/or.2014.3183] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 04/17/2014] [Indexed: 11/06/2022] Open
Abstract
Gastric cancer cells are insensitive to tumor necrosis factor-related apoptosis-inducing ligand (TRAIL), and we recently showed that lipid raft-regulated epidermal growth factor receptor (EGFR) activation antagonized TRAIL-induced apoptosis. However, it is not clear whether caveolin-1, an essential structural constituent of lipid rafts, regulates lipid raft-mediated EGFR activation. We report here that TRAIL induced the translocation of EGFR into lipid rafts and its activation in gastric cancer SGC-7901 and MGC-803 cells. Simultaneously, caveolin-1 was also activated. Knockdown of caveolin-1 partially prevented EGFR activation and increased TRAIL sensitivity. Moreover, TRAIL promoted the translocation of Src into lipid rafts and its activation, as well as the interaction of Src with both EGFR and caveolin-1. A Src inhibitor prevented these interactions and the activation of caveolin-1 and EGFR, and thus enhanced TRAIL-induced apoptosis. These data suggest that Src activates EGFR through the interaction of both Src-EGFR and Src-caveolin-1, and then antagonizes TRAIL-induced apoptosis in gastric cancer cells.
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Affiliation(s)
- Ling Xu
- Department of Medical Oncology, The First Hospital of China Medical University, Heping, Shenyang 110001, P.R. China
| | - Xiujuan Qu
- Department of Medical Oncology, The First Hospital of China Medical University, Heping, Shenyang 110001, P.R. China
| | - Heming Li
- Department of Medical Oncology, The First Hospital of China Medical University, Heping, Shenyang 110001, P.R. China
| | - Ce Li
- Department of Medical Oncology, The First Hospital of China Medical University, Heping, Shenyang 110001, P.R. China
| | - Jing Liu
- Department of Medical Oncology, The First Hospital of China Medical University, Heping, Shenyang 110001, P.R. China
| | - Huachuan Zheng
- Cancer Research Center, The First Affiliated Hospital of Liaoning Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Yunpeng Liu
- Department of Medical Oncology, The First Hospital of China Medical University, Heping, Shenyang 110001, P.R. China
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