1
|
Liu L, Chen H, Chen X, Yao C, Shen W, Jia C. KNTC1 as a putative tumor oncogene in pancreatic cancer. J Cancer Res Clin Oncol 2022:10.1007/s00432-022-04146-3. [DOI: 10.1007/s00432-022-04146-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 06/13/2022] [Indexed: 12/09/2022]
Abstract
Abstract
Purpose
Recent studies have demonstrated that kinetochore-associated protein 1 (KNTC1) plays a significant role in the carcinogenesis of numerous types of cancer. This study aimed to explore the role and possible mechanisms of KNTC1 in the development of pancreatic cancer.
Methods and results
We analyzed differentially expressed genes by RNA sequencing in three paired pancreatic cancer and para-cancerous tissue samples and found that the expression of KNTC1 was significantly upregulated in pancreatic cancer. A Cancer and Tumor Gene Map pan-analysis showed that high expression of KNTC1 was related to poor prognosis in 9499 tumor samples. With immunohistochemical staining, we found that the high expression of KNTC1 in pancreatic cancer was related to pathological grade and clinical prognosis. Similarly, RT-PCR results indicated that the expression of KNTC1 was higher in three groups of pancreatic cancer cell lines (BxPC-3, PANC-1, and SW1990) than in normal pancreatic ductal cells. We introduced lentivirus-mediated shRNA targeting KNTC1 into PANC-1 and SW1990 cells and found that KNTC1 knockdown significantly decreased cell growth and increased cell apoptosis compared to the control group cells. Bioinformatic analysis of the cell expression profile revealed that differential genes were mainly enriched in the cell cycle, mitosis, and STAT3 signaling pathways, and co-immunoprecipitation confirmed an interaction between KNTC1 and cell division cycle associated 8.
Conclusions
KNTC1 could be linked to the pathophysiology of pancreatic cancer and may be an early diagnostic marker of cervical precancerous lesions.
Collapse
|
2
|
Ali N, Srivastava N. Recent Advancements for the Management of Pancreatic Cancer: Current Insights. CURRENT CANCER THERAPY REVIEWS 2021. [DOI: 10.2174/1573394717666210625153256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
One of the most fatal forms of cancer includes cancer of the pancreas And the most
rapid malignancy is observed in PDAC (pancreatic ductal adenocarcinoma). The high lethality rate
is generally due to very late diagnosis and resistance to traditional chemotherapeutic agents. Desmoplastic
stromal barrier results in resistance to immunotherapy. Other reasons for the high lethality
rate include the absence of effective treatment and standard screening tests. Hence, there is a
need for effective novel carrier systems. “A formulation, method, or device that allows the desired
therapeutic substance to reach its site of action in such a manner that nontarget cells experience
minimum effect is referred to as a drug delivery system”. The delivery system is responsible for introducing
the active component into the body. They are also liable for boosting the efficacy and desirable
targeted action on the tumorous tissues. Several studies, researches, and developments have
yielded various advanced drug delivery systems, which include liposomes, nanoparticles, carbon
nanotubules, renovoCath, etc. These systems control rate and location of the release. They are designed
while taking into consideration characteristic properties of the tumor and tumor stroma. These
delivery systems overcome the barriers in drug deliverance in pancreatic cancer. Alongside providing
palliative benefits, these delivery systems also aim to correct the underlying reason for the
defect. The following review article aims and focuses to bring out a brief idea about systems, methods,
and technologies for futuristic drug deliverance in pancreatic cancer therapy.
Collapse
Affiliation(s)
- Naureen Ali
- Amity Institute of Pharmacy, Amity University, Uttar Pradesh, Lucknow Campus, Lucknow,India
| | - Nimisha Srivastava
- Amity Institute of Pharmacy, Amity University, Uttar Pradesh, Lucknow Campus, Lucknow,India
| |
Collapse
|
3
|
Kanda Y, Mizuno A, Takasaki T, Satoh R, Hagihara K, Masuko T, Endo Y, Tanabe G, Sugiura R. Down-regulation of dual-specificity phosphatase 6, a negative regulator of oncogenic ERK signaling, by ACA-28 induces apoptosis in NIH/3T3 cells overexpressing HER2/ErbB2. Genes Cells 2020; 26:109-116. [PMID: 33249692 DOI: 10.1111/gtc.12823] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 11/20/2020] [Accepted: 11/21/2020] [Indexed: 12/15/2022]
Abstract
Dual-specificity phosphatase 6 (DUSP6) is a key negative feedback regulator of the member of the RAS-ERK MAPK signaling pathway that is associated with cellular proliferation and differentiation. Deterioration of DUSP6 expression could therefore result in deregulated growth activity. We have previously discovered ACA-28, a novel anticancer compound with a unique property to stimulate ERK phosphorylation and induce apoptosis in ERK-active melanoma cells. However, the mechanism of cancer cell-specific-apoptosis by ACA-28 remains obscure. Here, we investigated the involvement of DUSP6 in the mechanisms of the ACA-28-mediated apoptosis by using the NIH/3T3 cells overexpressing HER2/ErbB2 (A4-15 cells), as A4-15 exhibited higher ERK phosphorylation and are more susceptible to ACA-28 than NIH/3T3. We showed that A4-15 exhibited high DUSP6 protein levels, which require ERK activation. Notably, the silencing of the DUDSP6 gene by siRNA inhibited proliferation and induced apoptosis in A4-15, but not in NIH/3T3, indicating that A4-15 requires high DUSP6 expression for growth. Importantly, ACA-28 preferentially down-regulated the DUSP6 protein and proliferation in A4-15 via the proteasome, while it stimulated ERK phosphorylation. Collectively, the up-regulation of DUSP6 may exert a growth-promoting role in cancer cells overexpressing HER2. DUSP6 down-regulation in ERK-active cancer cells might have the potential as a novel cancer measure.
Collapse
Affiliation(s)
- Yuki Kanda
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Kindai University, Higashi-Osaka, Japan
| | - Ayami Mizuno
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Kindai University, Higashi-Osaka, Japan
| | - Teruaki Takasaki
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Kindai University, Higashi-Osaka, Japan
| | - Ryosuke Satoh
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Kindai University, Higashi-Osaka, Japan
| | - Kanako Hagihara
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Kindai University, Higashi-Osaka, Japan
| | - Takashi Masuko
- Laboratory of Natural Drug Resources, Department of Pharmaceutical Sciences, Kindai University, Higashi-Osaka, Japan
| | - Yuichi Endo
- Laboratory of Natural Drug Resources, Department of Pharmaceutical Sciences, Kindai University, Higashi-Osaka, Japan
| | - Genzoh Tanabe
- Laboratory of Organic Chemistry, Department of Pharmacy, Kindai University, Higashi-Osaka, Japan
| | - Reiko Sugiura
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Kindai University, Higashi-Osaka, Japan.,Pharmaceutical Research and Technology Institute, Kindai University, Higashi-Osaka, Japan
| |
Collapse
|
4
|
Ullah MA, Sarkar B, Akter F. Prediction of biomarker signatures and therapeutic agents from blood sample against Pancreatic Ductal Adenocarcinoma (PDAC): A network-based study. INFORMATICS IN MEDICINE UNLOCKED 2020. [DOI: 10.1016/j.imu.2020.100346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
|
5
|
Boschetti E, D'Amato A, Candiano G, Righetti PG. Protein biomarkers for early detection of diseases: The decisive contribution of combinatorial peptide ligand libraries. J Proteomics 2017; 188:1-14. [PMID: 28882677 DOI: 10.1016/j.jprot.2017.08.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Revised: 08/09/2017] [Accepted: 08/13/2017] [Indexed: 12/31/2022]
Abstract
The present review deals with biomarker discovery, especially in regard to sample treatment via combinatorial peptide ligand libraries, perhaps the only technique at present allowing deep exploration of biological fluids and tissue extracts in search for low- to very-low-abundance proteins, which could possibly mark the onset of most pathologies. Early-stage biomarkers, in fact, might be the only way to detect the beginning of most diseases thus permitting proper intervention and care. The following cancers are reviewed, with lists of potential biomarkers suggested in various reports: hepatocellular carcinoma, ovarian cancer, breast cancer and pancreatic cancer, together with some other interesting applications. Although panels of proteins have been presented, with robust evidence, as potential early-stage biomarkers in these different pathologies, their approval by FDA as novel biomarkers in routine clinical chemistry settings would require plenty of additional work and efforts from the pharma industry. The science environment in universities could simply not afford such heavy monetary investments. SIGNIFICANCE After more than 16years of search for novel biomarkers, to be used in a clinical chemistry set-up, via proteomic analysis (mostly in biological fluids) it was felt a critical review was due. In the present report, though, only papers reporting biomarker discovery via combinatorial peptide ligand libraries are listed and assessed, since this methodology seems to be the most advanced one for digging in depth into low-to very-low-abundance proteins, which might represent important biomarkers for the onset of pathologies. In particular, a large survey has been made for the following diseases, since they appear to have a large incidence on human population and/or represent fatal diseases: ovarian cancer, breast cancer, pancreatic cancer and hepatocellular carcinoma.
Collapse
Affiliation(s)
| | - Alfonsina D'Amato
- Quadram Institute of Bioscience, Norwich Research Park, NR4 7UA Norwich, UK
| | - Giovanni Candiano
- Nephrology, Dialysis, Transplantation Unit and Laboratory on Pathophysiology of Uremia, Istituto Giannina Gaslini, Genoa, Italy
| | - Pier Giorgio Righetti
- Politecnico di Milano, Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Via Mancinelli 7, Milano 20131, Italy.
| |
Collapse
|
6
|
Pierce KJ, de Abreu FB, Peterson JD, Suriawinata AA, Tsongalis GJ, Liu X. The genomic profile of pancreatic adenocarcinoma and its relationship to metastatic disease. Exp Mol Pathol 2016; 101:172-175. [PMID: 27498048 DOI: 10.1016/j.yexmp.2016.07.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 07/27/2016] [Indexed: 01/05/2023]
Affiliation(s)
- K J Pierce
- Department of Pathology and Laboratory Medicine, Dartmouth Hitchcock Medical Center, Lebanon, NH, United States; Norris Cotton Cancer Center, One Medical Center Drive, Lebanon, NH, United States; The Theodore and Audrey Geisel School of Medicine at Dartmouth, Hanover, NH, United States.
| | - F B de Abreu
- Department of Pathology and Laboratory Medicine, Dartmouth Hitchcock Medical Center, Lebanon, NH, United States; Norris Cotton Cancer Center, One Medical Center Drive, Lebanon, NH, United States; The Theodore and Audrey Geisel School of Medicine at Dartmouth, Hanover, NH, United States
| | - J D Peterson
- Department of Pathology and Laboratory Medicine, Dartmouth Hitchcock Medical Center, Lebanon, NH, United States; Norris Cotton Cancer Center, One Medical Center Drive, Lebanon, NH, United States; The Theodore and Audrey Geisel School of Medicine at Dartmouth, Hanover, NH, United States
| | - A A Suriawinata
- Department of Pathology and Laboratory Medicine, Dartmouth Hitchcock Medical Center, Lebanon, NH, United States; Norris Cotton Cancer Center, One Medical Center Drive, Lebanon, NH, United States; The Theodore and Audrey Geisel School of Medicine at Dartmouth, Hanover, NH, United States
| | - G J Tsongalis
- Department of Pathology and Laboratory Medicine, Dartmouth Hitchcock Medical Center, Lebanon, NH, United States; Norris Cotton Cancer Center, One Medical Center Drive, Lebanon, NH, United States; The Theodore and Audrey Geisel School of Medicine at Dartmouth, Hanover, NH, United States
| | - X Liu
- Department of Pathology and Laboratory Medicine, Dartmouth Hitchcock Medical Center, Lebanon, NH, United States; Norris Cotton Cancer Center, One Medical Center Drive, Lebanon, NH, United States; The Theodore and Audrey Geisel School of Medicine at Dartmouth, Hanover, NH, United States
| |
Collapse
|
7
|
Lindberg JM, Newhook TE, Adair SJ, Walters DM, Kim AJ, Stelow EB, Parsons JT, Bauer TW. Co-treatment with panitumumab and trastuzumab augments response to the MEK inhibitor trametinib in a patient-derived xenograft model of pancreatic cancer. Neoplasia 2015; 16:562-71. [PMID: 25117978 PMCID: PMC4198828 DOI: 10.1016/j.neo.2014.06.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Revised: 06/23/2014] [Accepted: 06/26/2014] [Indexed: 12/16/2022] Open
Abstract
Kirsten rat sarcoma viral oncogene homolog (KRAS) mutations and epidermal growth factor receptor (EGFR) family signaling are drivers of tumorigenesis in pancreatic ductal adenocarcinoma (PDAC). Previous studies have demonstrated that combinatorial treatment of PDAC xenografts with the mitogen-activated protein kinase–extracellular-signal-regulated kinase (ERK) kinase1/2 (MEK1/2) inhibitor trametinib and the dual EGFR/human epidermal growth factor receptor 2 (HER2) inhibitor lapatinib provided more effective inhibition than either treatment alone. In this study, we have used the therapeutic antibodies, panitumumab (specific for EGFR) and trastuzumab (specific for HER2), to probe the role of EGFR and HER2 signaling in the proliferation of patient-derived xenograft (PDX) tumors. We show that dual anti-EGFR and anti-HER2 therapy significantly augmented the growth inhibitory effects of the MEK1/2 inhibitor trametinib in three different PDX tumors. While significant growth inhibition was observed in both KRAS mutant xenograft groups receiving trametinib and dual antibody therapy (tumors 366 and 608), tumor regression was observed in the KRAS wild-type xenografts (tumor 738) treated in the same manner. Dual antibody therapy in conjunction with trametinib was equally or more effective at inhibiting tumor growth and with lower apparent toxicity than trametinib plus lapatinib. Together, these studies provide further support for a role for EGFR and HER2 in pancreatic cancer proliferation and underscore the importance of therapeutic intervention in both the KRAS–rapidly accelerated fibrosarcoma kinase (RAF)–MEK–ERK and EGFR-HER2 pathways to achieve maximal therapeutic efficacy in patients.
Collapse
Affiliation(s)
- James M Lindberg
- Department of Surgery, University of Virginia Health System, Charlottesville, VA, 22908 USA
| | - Timothy E Newhook
- Department of Surgery, University of Virginia Health System, Charlottesville, VA, 22908 USA
| | - Sara J Adair
- Department of Surgery, University of Virginia Health System, Charlottesville, VA, 22908 USA
| | - Dustin M Walters
- Department of Surgery, University of Virginia Health System, Charlottesville, VA, 22908 USA
| | - Alison J Kim
- Department of Surgery, University of Virginia Health System, Charlottesville, VA, 22908 USA
| | - Edward B Stelow
- Department of Pathology, University of Virginia Health System, Charlottesville, VA, 22908 USA
| | - J Thomas Parsons
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia Health System, Charlottesville, VA, 22908 USA
| | - Todd W Bauer
- Department of Surgery, University of Virginia Health System, Charlottesville, VA, 22908 USA.
| |
Collapse
|
8
|
DUSP6 regulates drug sensitivity by modulating DNA damage response. Br J Cancer 2013; 109:1063-71. [PMID: 23839489 PMCID: PMC3749559 DOI: 10.1038/bjc.2013.353] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Revised: 06/13/2013] [Accepted: 06/14/2013] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Dual specificity phosphatase 6 (DUSP6) is a member of a family of mitogen-activated protein kinase phosphatases that dephosphorylates and inhibits activated ERK1/2. Dual specificity phosphatase 6 is dynamically regulated in developmental and pathological conditions such as cancer. METHODS Cancer cell lines were made deficient in DUSP6 by siRNA and shRNA silencing. Sensitivity to anti-EGFR and chemotherapeutic agents was determined in viability and apoptosis assays, and in xenografts established in SCID mice. Cellular effects of DUSP6 inactivation were analysed by proteomic methods, followed by analysis of markers of DNA damage response (DDR) and cell cycle. RESULTS We determined that depletion of DUSP6 reduced the viability of cancer cell lines and increased the cytotoxicity of EGFR and other targeted inhibitors, and cytotoxic agents, in vitro and in vivo. Subsequent phosphoproteomic analysis indicated DUSP6 depletion significantly activated CHEK2 and p38, which function in the DDR pathway, and elevated levels of phosphorylated H2AX, ATM, and CHEK2, for the first time identifying a role for DUSP6 in regulating DDR. CONCLUSION Our results provide a novel insight into the DUSP6 function in regulating genomic integrity and sensitivity to chemotherapy in cancer.
Collapse
|
9
|
Saito A, Ochiai H, Okada S, Miyata N, Azuma T. Suppression of Lefty expression in induced pluripotent cancer cells. FASEB J 2013; 27:2165-74. [PMID: 23407711 DOI: 10.1096/fj.12-221432] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Cancer and stem cells share the ability to silence tumor suppressors. We focused on Lefty, which encodes one of the most abundant tumor suppressors in embryonic stem (ES) cells and is not expressed in somatic cancer cells. We found that transforming growth factor β (TGF-β) induced demethylation of the Lefty B cytosine-phosphate-guanine (CpG) island and increased Lefty expression (10-200 times) in human pancreatic cancer cells and human liver cancer cells (PLC/PRF/5 and HLF). Expression of Cripto, another important factor in Nodal-Lefty signaling, was not increased after adding TGF-β. We generated reprogrammed cancer cells that revealed high expression of immature marker proteins, high proliferation, and the potential to express morphological patterns of ectoderm, mesoderm, and endoderm, suggesting that these cells may have cancer stem cell-like phenotypes. We investigated Lefty and found that reprogrammed human liver cancer cells (induced pluripotent cancer cells) displayed a much lower ability to express Lefty, although less Lefty B CpG methylation was also observed. We also found that a MEK inhibitor dramatically enhanced Lefty expression in human pancreatic cancers with mutated ras, whereas Lefty B CpG methylation was not decreased. These observations indicate that despite the demethylation of DNA strands in promoter regions of pluripotency-associated genes, including Lefty gene, Lefty expression was not induced well in reprogrammed cells. Of note was the fact that Lefty is abundantly expressed in human ES cells but not in induced pluripotent stem (iPS) cells. We thus think that reprogrammed cancer cells share the mechanism for expression of Lefty with iPS cells. This shared mechanism may contribute to the cancerous transformation of iPS cells.
Collapse
Affiliation(s)
- Akiko Saito
- Department of Biochemistry, Tokyo Dental College, Chiba, Japan
| | | | | | | | | |
Collapse
|
10
|
Kubiczkova L, Sedlarikova L, Hajek R, Sevcikova S. TGF-β - an excellent servant but a bad master. J Transl Med 2012; 10:183. [PMID: 22943793 PMCID: PMC3494542 DOI: 10.1186/1479-5876-10-183] [Citation(s) in RCA: 351] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Accepted: 08/28/2012] [Indexed: 12/13/2022] Open
Abstract
The transforming growth factor (TGF-β) family of growth factors controls an immense number of cellular responses and figures prominently in development and homeostasis of most human tissues. Work over the past decades has revealed significant insight into the TGF-β signal transduction network, such as activation of serine/threonine receptors through ligand binding, activation of SMAD proteins through phosphorylation, regulation of target genes expression in association with DNA-binding partners and regulation of SMAD activity and degradation. Disruption of the TGF-β pathway has been implicated in many human diseases, including solid and hematopoietic tumors. As a potent inhibitor of cell proliferation, TGF-β acts as a tumor suppressor; however in tumor cells, TGF-β looses anti-proliferative response and become an oncogenic factor. This article reviews current understanding of TGF-β signaling and different mechanisms that lead to its impairment in various solid tumors and hematological malignancies.
Collapse
Affiliation(s)
- Lenka Kubiczkova
- Babak Myeloma Group, Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Brno, 625 00, Czech Republic
| | | | | | | |
Collapse
|
11
|
Xu YH, Liu Z, Guo KJ, Du RX. ATF2, a novel factor promoting epithelial-mesenchymal transition in human pancreatic cancer cells. Shijie Huaren Xiaohua Zazhi 2012; 20:2265-2269. [DOI: 10.11569/wcjd.v20.i24.2265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate whether ATF2 together with TGF-β1 can induce epithelial-mesenchymal transition (EMT) in human pancreatic cancer cell line Capan2.
METHODS: Capan2 cells were induced with TGF-β1 after transfection with PGEX-ATF2, and the negative control group was treated with DMSO. Cell morphological alternations were examined by phase contrast microscopy. The expression of mesenchymal marker vimentin and epithelial markers E-cadherin and ATF2 were detected by Western blot. Cell migration was determined by Transwell motility assay.
RESULTS: Compare to the negative control group, cells transfected with ATF2 and treated with TGF-β1 showed loss of cell-cell contacts, fibroblastic morphology, decreased expression of E-cadherin, up-regulated expression of vimentin and ATF2, and increased migration ability (P = 0.008).
CONCLUSION: ATF2 together with TGF-β1 can induce EMT in human pancreatic cancer cell line Capan2. ATF2 may be a new molecular target for therapy of pancreatic cancer.
Collapse
|
12
|
Imai M, Takahashi N. Growth inhibition and mechanism of action of p-dodecylaminophenol against refractory human pancreatic cancer and cholangiocarcinoma. Bioorg Med Chem 2012; 20:2520-6. [DOI: 10.1016/j.bmc.2012.02.060] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2012] [Revised: 02/25/2012] [Accepted: 02/27/2012] [Indexed: 11/16/2022]
|
13
|
Xu Y, Liu Z, Guo K. The Effect of JDP2 and ATF2 on the Epithelial-mesenchymal Transition of Human Pancreatic Cancer Cell Lines. Pathol Oncol Res 2011; 18:571-7. [DOI: 10.1007/s12253-011-9476-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2011] [Accepted: 11/07/2011] [Indexed: 01/11/2023]
|
14
|
Xu YH, Liu Z, Guo KJ, Du RX, Wang CY. JDP2 suppresses transforming growth factor-β1-induced epithelial-mesenchymal transition in human pancreatic cancer cell line Panc-1. Shijie Huaren Xiaohua Zazhi 2011; 19:2931-2936. [DOI: 10.11569/wcjd.v19.i28.2931] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To determine the correlation between overexpression of Jun dimerization protein 2 (JDP2) and epithelial-mesenchymal transition (EMT) in human pancreatic cancer cell line Panc-1.
METHODS: Panc-1 cells were divided into three groups: negative control group, JDP2-transfected group, and empty vector-transfected group. The JDP2-transfected group and empty vector-transfected group were transiently transfected with PCEFL-HA-JDP2 vector and pCEFL vector, respectively. Untreated Panc-1 cells were used as normal controls. Forty-eight hours after transfection, cells were treated with TGF-β1 (10 ng/mL). Cell morphological alternations were examined by phase-contrast microscopy. The expression of mesenchymal marker vimentin and epithelial marker E-cadherin was detected by RT-PCR and Western blot. Cell migration was determined by Transwell motility assay.
RESULTS: TGF-β1-induced EMT was inhibited in the JDP2-transfected group. Compare to the negative control group, cells in the JDP2-transfected group showed no fibroblastic morphology and no significant changes in the levels of E-cadherin and vimentin and in migration ability (48.0 ± 5.3 vs 52.0 ± 7.2). However, cells in the vector-transfected group showed loss of cell-cell contacts, fibroblastic morphology, decreased expression of E-cadherin (mRNA: P < 0.01; protein: P < 0.05), increased expression of vimentin (P < 0.01) and migration ability (48.0 ± 5.3 vs 81.0 ± 10.7, P < 0.01) when compared to the negative control group.
CONCLUSION: JDP2 can inhibit TGF-β1-induced EMT in Panc-1 cells and may be a molecular target for pancreatic carcinoma therapy.
Collapse
|
15
|
Kovacevic Z, Chikhani S, Lovejoy DB, Richardson DR. Novel Thiosemicarbazone Iron Chelators Induce Up-Regulation and Phosphorylation of the Metastasis Suppressor N-myc Down-Stream Regulated Gene 1: A New Strategy for the Treatment of Pancreatic Cancer. Mol Pharmacol 2011; 80:598-609. [DOI: 10.1124/mol.111.073627] [Citation(s) in RCA: 139] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
|
16
|
Zhao WG, Yu SN, Lu ZH, Ma YH, Gu YM, Chen J. The miR-217 microRNA functions as a potential tumor suppressor in pancreatic ductal adenocarcinoma by targeting KRAS. Carcinogenesis 2010; 31:1726-33. [PMID: 20675343 DOI: 10.1093/carcin/bgq160] [Citation(s) in RCA: 185] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Aberrantly expressed microRNA (miRNA) is frequently associated with a variety of cancers, including pancreatic ductal adenocarcinoma (PDAC). In this study, we investigated the expression and possible role of miR-217 in PDAC. Data obtained by locked nucleic acid in situ hybridization and real-time quantitative polymerase chain reaction showed that miR-217 was downregulated in 76.2% (16/21) of PDAC tissues and in all tested PDAC cell lines when compared with the corresponding normal pancreatic tissue. Overexpression of miR-217 in PDAC cells inhibited tumor cell growth and anchorage-independent colony formation and miR-217 decreased tumor cell growth in nude mouse xenografts in vivo. Using in silico predictions, KRAS was defined as a potential direct target of miR-217. Data from the dual-luciferase reporter gene assay showed that KRAS was a direct target of miR-217. Upregulation of miR-217 could decrease KRAS protein levels and reduce the constitutive phosphorylation of downstream AKT. Downregulation of miR-217 expression in PDAC cells could increase cell anchorage-independent colony formation and KRAS protein levels. Furthermore, miR-217 expression was observed to be negatively correlated with KRAS protein expression in PDAC cell lines. We conclude that the frequently downregulated miR-217 can regulate KRAS and function as a tumor suppressor in PDAC. Therefore, miR-217 may serve as a useful therapeutic agent for miRNA-based PDAC therapy.
Collapse
Affiliation(s)
- Wu-Gan Zhao
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tsinghua University, 1 Shuai Fu Yuan Hu Tong, Beijing 100730, People's Republic of China
| | | | | | | | | | | |
Collapse
|
17
|
Renouf D, Moore M. Evolution of systemic therapy for advanced pancreatic cancer. Expert Rev Anticancer Ther 2010; 10:529-40. [PMID: 20397918 DOI: 10.1586/era.10.21] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The prognosis for advanced pancreatic cancer remains poor and successful drug development in this disease continues to be a major challenge. In the last decade the approach to drug development in pancreatic cancer has included a focus on combinations of cytotoxic agents. While some promising results were seen in Phase II studies, none of the Phase III trials of cytotoxic combinations were able to demonstrate an improvement in overall survival over that seen with the single-agent gemcitabine. Newer studies have assessed the efficacy of 'targeted' agents that inhibit pathways thought to be important in the development, growth, invasion and metastasis of pancreatic cancer. Although some agents had promising activity in preclinical studies, none has made a major impact in the clinic. There has been some success with the addition of the EGF receptor tyrosine kinase inhibitor erlotinib to gemcitabine, which was the first combination to achieve an overall survival benefit compared with gemcitabine alone in a Phase III trial. Future directions for drug development in pancreatic cancer will mainly involve testing new targeted agents, although some cytotoxic combinations are currently in Phase III testing. There is a need to better understand the biology of the disease and incorporate this into trials in an attempt to search for predictive and prognostic markers that will aid in drug development. Control of pancreatic cancer will require combinations of targeted agents, probably individualized based on tumor genetics. We are just beginning to explore the efficacy of combining targeted agents in the clinic.
Collapse
Affiliation(s)
- Daniel Renouf
- Department of Medical Oncology, Princess Margaret Hospital, 5-708, 610 University Avenue, Toronto, ON M5G 2M9, Canada.
| | | |
Collapse
|
18
|
Merchant JL, Saqui-Salces M, El-Zaatari M. Hedgehog signaling in gastric physiology and cancer. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2010; 96:133-56. [PMID: 21075343 DOI: 10.1016/b978-0-12-381280-3.00006-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The Hedgehog family of ligands was originally identified in mutagenesis screens of Drosophila embryos. Hedgehog signaling in multiple tissues is important during embryonic development. A common theme regarding Hedgehog expression in adult tissues is that tissue injury reactivates the developmental pattern of expression. In most instances, this appears to be important to initiate tissue repair. In the gastrointestinal (GI) tract, where epithelial cells are constantly replenished from progenitor populations, Hedgehog signaling also appears to be essential for regeneration. By contrast, reactivated Hedgehog signaling in adult tissues does not automatically predispose the tissue to transformation, but instead requires sustained tissue injury in the form of chronic inflammation. In this chapter, we review what is known about Hedgehog ligands and signaling during development of relevant organs, and discuss how the patterns of Hedgehog regulation are recapitulated in the GI tract during embryogenesis, adult homeostasis, and neoplastic transformation.
Collapse
Affiliation(s)
- Juanita L Merchant
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | | | | |
Collapse
|