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El-Korany WA, Zahran WE, Alm El-Din MA, Al-Shenawy HA, Soliman AF. Rs12039395 Variant Influences the Expression of hsa-miR-181a-5p and PTEN Toward Colorectal Cancer Risk. Dig Dis Sci 2024:10.1007/s10620-024-08517-3. [PMID: 38940971 DOI: 10.1007/s10620-024-08517-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Accepted: 05/31/2024] [Indexed: 06/29/2024]
Abstract
BACKGROUND Single nucleotide polymorphisms (SNPs) in microRNA (miRNA) genes could alter miRNA expression levels or processing and, thus, may contribute to colorectal cancer (CRC) development. Therefore, this study aimed to examine whether the MIR181A1 genomic sequence possesses SNPs that can affect the expression of hsa-miR-181a-5p and, subsequently, impact its targets and associate with CRC risk. METHODS The NCBI dbSNP database was searched for possible SNPs associated with MIR181A1. One SNP with a minor allele frequency > 5%, rs12039395 G > T was identified. In silico analyses determined the effect of the SNP on the secondary structure of the miRNA and predicted the hsa-miR-181a-5p target genes. The SNP was genotyped using allelic discrimination assay, the relative hsa-miR-181a-5p expression level was determined using quantitative real-time PCR, and immunohistochemical staining was used to detect target genes in 192 paraffin-embedded specimens collected from 160 CRC patients and 32 healthy subjects. RESULTS The rs6505162 SNP conferred protection against CRC, and the G-allele presence provides may provide accessibility for the transcriptional machinery. Hsa-miR-181a-5p was significantly over-expressed in the CRC group compared to controls and in samples carrying the G-allele compared to those with T-allele. PTEN, identified as the only hsa-miR-181a-5p target implicated in CRC, was significantly diminished in the CRC group compared to controls and showed an inverse relationship with hsa-miR-181a-5p expression level as well as negatively associated with the G-allele presence in CRC. CONCLUSION This study highlights that rs12039395 G > T may protect against CRC by influencing the expression of hsa-mir-181a-5p and its target gene, PTEN.
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Affiliation(s)
- Wael A El-Korany
- Biochemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt
| | - Walid E Zahran
- Biochemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt
| | - Mohamed A Alm El-Din
- Clinical Oncology Department, Faculty of Medicine, Tanta University, Gharbia, Egypt
| | - Hanan A Al-Shenawy
- Pathology Department, Faculty of Medicine, Tanta University, Gharbia, Egypt
| | - Ahmed F Soliman
- Biochemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt.
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2
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Lee SO, Lee MH, Kwak AW, Lee JY, Yoon G, Joo SH, Choi YH, Park JW, Shim JH. Licochalcone H Targets EGFR and AKT to Suppress the Growth of Oxaliplatin -Sensitive and -Resistant Colorectal Cancer Cells. Biomol Ther (Seoul) 2023; 31:661-673. [PMID: 37899744 PMCID: PMC10616518 DOI: 10.4062/biomolther.2023.155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 09/20/2023] [Accepted: 09/21/2023] [Indexed: 10/31/2023] Open
Abstract
Treatment of colorectal cancer (CRC) has always been challenged by the development of resistance. We investigated the antiproliferative activity of licochalcone H (LCH), a regioisomer of licochalcone C derived from the root of Glycyrrhiza inflata, in oxaliplatin (Ox)-sensitive and -resistant CRC cells. LCH significantly inhibited cell viability and colony growth in both Ox-sensitive and Ox-resistant CRC cells. We found that LCH decreased epidermal growth factor receptor (EGFR) and AKT kinase activities and related activating signaling proteins including pEGFR and pAKT. A computational docking model indicated that LCH may interact with EGFR, AKT1, and AKT2 at the ATP-binding sites. LCH induced ROS generation and increased the expression of the ER stress markers. LCH treatment of CRC cells induced depolarization of MMP. Multi-caspase activity was induced by LCH treatment and confirmed by Z-VAD-FMK treatment. LCH increased the number of sub-G1 cells and arrested the cell cycle at the G1 phase. Taken together LCH inhibits the growth of Ox-sensitive and Ox-resistant CRC cells by targeting EGFR and AKT, and inducing ROS generation and ER stress-mediated apoptosis. Therefore, LCH could be a potential therapeutic agent for improving not only Ox-sensitive but also Ox-resistant CRC treatment.
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Affiliation(s)
- Seung-On Lee
- Department of Biomedicine, Health & Life Convergence Sciences, BK21 Four, College of Pharmacy, Mokpo National University, Muan 58554, Republic of Korea
| | - Mee-Hyun Lee
- College of Korean Medicine, Dongshin University, Naju 58245, Republic of Korea
| | - Ah-Won Kwak
- Biosystem Research Group, Department of Predictive Toxicology, Korea Institute of Toxicology, Daejeon 34114, Republic of Korea
| | - Jin-Young Lee
- Department of Biological Sciences, Keimyung University, Daegu 42601, Republic of Korea
| | - Goo Yoon
- Department of Pharmacy, College of Pharmacy, Mokpo National University, Muan 58554, Republic of Korea
| | - Sang Hoon Joo
- College of Pharmacy, Daegu Catholic University, Gyeongsan 38430, Republic of Korea
| | - Yung Hyun Choi
- Department of Biochemistry, College of Korean Medicine, Dong-Eui University, Busan 47227, Republic of Korea
| | - Jin Woo Park
- Department of Biomedicine, Health & Life Convergence Sciences, BK21 Four, College of Pharmacy, Mokpo National University, Muan 58554, Republic of Korea
- Department of Pharmacy, College of Pharmacy, Mokpo National University, Muan 58554, Republic of Korea
| | - Jung-Hyun Shim
- Department of Biomedicine, Health & Life Convergence Sciences, BK21 Four, College of Pharmacy, Mokpo National University, Muan 58554, Republic of Korea
- Department of Pharmacy, College of Pharmacy, Mokpo National University, Muan 58554, Republic of Korea
- The China-US (Henan) Hormel Cancer Institute, Zhengzhou 450008, China
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3
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Chakraborty S, Karmakar S, Basu M, Kal S, Ghosh MK. The E3 ubiquitin ligase CHIP drives monoubiquitylation-mediated nuclear import of the tumor suppressor PTEN. J Cell Sci 2023; 136:jcs260950. [PMID: 37676120 DOI: 10.1242/jcs.260950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 08/04/2023] [Indexed: 09/08/2023] Open
Abstract
Monoubiquitylation is a principal mechanism driving nuclear translocation of the protein PTEN (phosphatase and tensin homolog deleted on chromosome ten). In this study, we describe a novel mechanism wherein the protein CHIP (C-terminus of Hsc70-interacting protein) mediates PTEN monoubiquitylation, leading to its nuclear import. Western blot analysis revealed a rise in both nuclear and total cellular PTEN levels under monoubiquitylation-promoting conditions, an effect that was abrogated by silencing CHIP expression. We established time-point kinetics of CHIP-mediated nuclear translocation of PTEN using immunocytochemistry and identified a role of karyopherin α1 (KPNA1) in facilitating nuclear transport of monoubiquitylated PTEN. We further established a direct interaction between CHIP and PTEN inside the nucleus, with CHIP participating in either polyubiquitylation or monoubiquitylation of nuclear PTEN. Finally, we showed that oxidative stress enhanced CHIP-mediated nuclear import of PTEN, which resulted in increased apoptosis, and decreased cell viability and proliferation, whereas CHIP knockdown counteracted these effects. To the best of our knowledge, this is the first report elucidating non-canonical roles for CHIP on PTEN, which we establish here as a nuclear interacting partner of CHIP.
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Affiliation(s)
- Shrabastee Chakraborty
- Cancer Biology and Inflammatory Disorder Division, Council of Scientific and Industrial Research-Indian Institute of Chemical Biology (CSIR-IICB), TRUE Campus, CN-6, Sector-V, Salt Lake, Kolkata 700091 and 4, Raja S.C. Mullick Road, Jadavpur, Kolkata 700032, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Subhajit Karmakar
- Cancer Biology and Inflammatory Disorder Division, Council of Scientific and Industrial Research-Indian Institute of Chemical Biology (CSIR-IICB), TRUE Campus, CN-6, Sector-V, Salt Lake, Kolkata 700091 and 4, Raja S.C. Mullick Road, Jadavpur, Kolkata 700032, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Malini Basu
- Department of Microbiology, Dhruba Chand Halder College, Dakshin Barasat, South 24 Parganas 743372, India
| | - Satadeepa Kal
- Cancer Biology and Inflammatory Disorder Division, Council of Scientific and Industrial Research-Indian Institute of Chemical Biology (CSIR-IICB), TRUE Campus, CN-6, Sector-V, Salt Lake, Kolkata 700091 and 4, Raja S.C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Mrinal K Ghosh
- Cancer Biology and Inflammatory Disorder Division, Council of Scientific and Industrial Research-Indian Institute of Chemical Biology (CSIR-IICB), TRUE Campus, CN-6, Sector-V, Salt Lake, Kolkata 700091 and 4, Raja S.C. Mullick Road, Jadavpur, Kolkata 700032, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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4
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Langdon CG. Nuclear PTEN's Functions in Suppressing Tumorigenesis: Implications for Rare Cancers. Biomolecules 2023; 13:biom13020259. [PMID: 36830628 PMCID: PMC9953540 DOI: 10.3390/biom13020259] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/25/2023] [Accepted: 01/28/2023] [Indexed: 01/31/2023] Open
Abstract
Phosphatase and tensin homolog (PTEN) encodes a tumor-suppressive phosphatase with both lipid and protein phosphatase activity. The tumor-suppressive functions of PTEN are lost through a variety of mechanisms across a wide spectrum of human malignancies, including several rare cancers that affect pediatric and adult populations. Originally discovered and characterized as a negative regulator of the cytoplasmic, pro-oncogenic phosphoinositide-3-kinase (PI3K) pathway, PTEN is also localized to the nucleus where it can exert tumor-suppressive functions in a PI3K pathway-independent manner. Cancers can usurp the tumor-suppressive functions of PTEN to promote oncogenesis by disrupting homeostatic subcellular PTEN localization. The objective of this review is to describe the changes seen in PTEN subcellular localization during tumorigenesis, how PTEN enters the nucleus, and the spectrum of impacts and consequences arising from disrupted PTEN nuclear localization on tumor promotion. This review will highlight the immediate need in understanding not only the cytoplasmic but also the nuclear functions of PTEN to gain more complete insights into how important PTEN is in preventing human cancers.
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Affiliation(s)
- Casey G. Langdon
- Department of Pediatrics, Darby Children’s Research Institute, Medical University of South Carolina, Charleston, SC 29425, USA; ; Tel.: +1-(843)-792-9289
- Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
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5
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Liu R, Rizzo S, Waliany S, Garmhausen MR, Pal N, Huang Z, Chaudhary N, Wang L, Harbron C, Neal J, Copping R, Zou J. Systematic pan-cancer analysis of mutation-treatment interactions using large real-world clinicogenomics data. Nat Med 2022; 28:1656-1661. [PMID: 35773542 DOI: 10.1038/s41591-022-01873-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 05/16/2022] [Indexed: 11/10/2022]
Abstract
Quantifying the effectiveness of different cancer therapies in patients with specific tumor mutations is critical for improving patient outcomes and advancing precision medicine. Here we perform a large-scale computational analysis of 40,903 US patients with cancer who have detailed mutation profiles, treatment sequences and outcomes derived from electronic health records. We systematically identify 458 mutations that predict the survival of patients on specific immunotherapies, chemotherapy agents or targeted therapies across eight common cancer types. We further characterize mutation-mutation interactions that impact the outcomes of targeted therapies. This work demonstrates how computational analysis of large real-world data generates insights, hypotheses and resources to enable precision oncology.
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Affiliation(s)
- Ruishan Liu
- Department of Electrical Engineering, Stanford University, Stanford, CA, USA.,Department of Biomedical Data Science, Stanford University, Stanford, CA, USA
| | | | - Sarah Waliany
- School of Medicine, Stanford University, Stanford, CA, USA
| | | | | | - Zhi Huang
- Department of Biomedical Data Science, Stanford University, Stanford, CA, USA
| | | | - Lisa Wang
- Genentech, South San Francisco, CA, USA
| | | | - Joel Neal
- School of Medicine, Stanford University, Stanford, CA, USA
| | | | - James Zou
- Department of Electrical Engineering, Stanford University, Stanford, CA, USA. .,Department of Biomedical Data Science, Stanford University, Stanford, CA, USA.
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6
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The Novel Phosphatase Domain Mutations Q171R and Y65S Switch PTEN from Tumor Suppressor to Oncogene. Cells 2021; 10:cells10123423. [PMID: 34943931 PMCID: PMC8700245 DOI: 10.3390/cells10123423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 11/28/2021] [Accepted: 12/02/2021] [Indexed: 11/17/2022] Open
Abstract
Phosphatase and tensin homolog deleted on chromosome 10, or PTEN, is a well-characterized tumor suppressor with both lipid and protein phosphatase activities. PTEN is often downregulated by epigenetic mechanisms such as hypermethylation, which leads to constitutive activation of the PI3K-Akt pathway. Large datasets from next-generation sequencing, however, revealed that mutations in PTEN may not only hamper protein function but may also affect interactions with downstream effectors, leading to variable oncogenic readouts. Here, two novel PTEN mutations, Q171R and Y65S, identified in Filipino colorectal cancer patients, were phenotypically characterized in NIH3T3 and HCT116 cells, alongside the C124S canonical mutant and wild-type controls. The novel mutants increased cellular proliferation, resistance to apoptosis and migratory capacity. They induced gross morphological changes including cytoplasmic shrinkage, increased cellular protrusions and extensive cytoskeletal reorganization. The mutants also induced a modest increase in Akt phosphorylation. Further mechanistic studies will help determine the differential oncogenic potencies of these mutants, and resolve whether the structural constraints imposed by the mutations may have altered associations with downstream effectors.
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7
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Aboutalebi H, Bahrami A, Soleimani A, Saeedi N, Rahmani F, Khazaei M, Fiuji H, Shafiee M, Ferns GA, Avan A, Hassanian SM. The diagnostic, prognostic and therapeutic potential of circulating microRNAs in ovarian cancer. Int J Biochem Cell Biol 2020; 124:105765. [PMID: 32428568 DOI: 10.1016/j.biocel.2020.105765] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Revised: 04/06/2020] [Accepted: 05/03/2020] [Indexed: 12/11/2022]
Abstract
Ovarian cancer (OC) is often diagnosed at an advanced stage because of the late onset of symptoms, and this together with the lack of effective treatments, has meant it is associated with a very high mortality. The aberrant expression of MicroRNA (miRNA) contributes to the initiation and development of human tumors including OC. Several miRNAs are secreted by tumor cells and can be identified in body fluids. Serum miRNAs levels are associated with several clinical conditions, and may be used to predict prognosis and response to treatments in some cancers including OC. This review summarizes the current progresses regarding the potential applications of circulating miRNA as innovative biomarkers in OC.
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Affiliation(s)
- Hamideh Aboutalebi
- Department of Anatomy, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Afsane Bahrami
- Cellular and Molecular Research Center, Birjand University of Medical Sciences, Birjand, Iran
| | - Atena Soleimani
- Department of Clinical Biochemistry, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran; Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Nikoo Saeedi
- Student Research Committee, Islamic Azad University, Mashhad Branch, Mashhad, Iran
| | - Farzad Rahmani
- Iranshahr University of Medical Sciences, Iranshahr, Iran
| | - Majid Khazaei
- Department of Medical Physiology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamid Fiuji
- Department of Biochemistry, Payame-Noor University, Mashhad, Iran
| | - Mojtaba Shafiee
- College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Gordon A Ferns
- Brighton & Sussex Medical School, Division of Medical Education, Falmer, Brighton, Sussex BN1 9PH, UK
| | - Amir Avan
- Metabolic Syndrome Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Seyed Mahdi Hassanian
- Department of Clinical Biochemistry, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran; Brighton & Sussex Medical School, Division of Medical Education, Falmer, Brighton, Sussex BN1 9PH, UK.
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8
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Soleimani A, Rahmani F, Ferns GA, Ryzhikov M, Avan A, Hassanian SM. Role of Regulatory Oncogenic or Tumor Suppressor miRNAs of PI3K/AKT Signaling Axis in the Pathogenesis of Colorectal Cancer. Curr Pharm Des 2019; 24:4605-4610. [PMID: 30636581 DOI: 10.2174/1381612825666190110151957] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 12/24/2018] [Accepted: 12/31/2018] [Indexed: 02/06/2023]
Abstract
Colorectal cancer (CRC) is the leading cause of cancer death worldwide and its incidence is increasing. In most patients with CRC, the PI3K/AKT signaling axis is over-activated. Regulatory oncogenic or tumor suppressor microRNAs (miRNAs) for PI3K/AKT signaling regulate cell proliferation, migration, invasion, angiogenesis, as well as resistance to chemo-/radio-therapy in colorectal cancer tumor tissues. Thus, regulatory miRNAs of PI3K/AKT/mTOR signaling represent novel biomarkers for new patient diagnosis and obtaining clinically invaluable information from post-treatment CRC patients for improving therapeutic strategies. This review summarizes the current knowledge of miRNAs' regulatory roles of PI3K/AKT signaling in CRC pathogenesis.
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Affiliation(s)
- Atena Soleimani
- Department of Medical Biochemistry, faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Farzad Rahmani
- Department of Medical Biochemistry, faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Metabolic Syndrome Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Gordon A Ferns
- Brighton & Sussex Medical School, Division of Medical Education, Falmer, Brighton, Sussex BN1 9PH, United Kingdom
| | - Mikhail Ryzhikov
- Division of Pulmonary and Critical Care Medicine, Washington University, School of Medicine, Saint Louis, MO, United States
| | - Amir Avan
- Metabolic Syndrome Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Modern Sciences and Technologies, Faculty of Medicine, Mashhad University of M edical Sciences, Mashhad, Iran
| | - Seyed Mahdi Hassanian
- Department of Medical Biochemistry, faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Metabolic Syndrome Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
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9
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Chikamatsu S, Saijo K, Imai H, Narita K, Kawamura Y, Katoh T, Ishioka C. In Vitro and in Vivo antitumor activity and the mechanism of siphonodictyal B in human colon cancer cells. Cancer Med 2019; 8:5662-5672. [PMID: 31364822 PMCID: PMC6745845 DOI: 10.1002/cam4.2409] [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: 12/28/2018] [Revised: 06/23/2019] [Accepted: 06/25/2019] [Indexed: 12/28/2022] Open
Abstract
Liphagal, isolated from the marine sponge Aka coralliphaga, exhibits phosphatidylinositol 3‐kinase alpha (PI3Kα) inhibitory activity and cytotoxic effects in human cancer cells. Siphonodictyal B, the biogenetic precursor of liphagal, also has PI3K inhibitory activity. However, its cytotoxic or antitumor activities have not been evaluated. In this study, we demonstrated that siphonodictyal B inhibits several kinases such as CDK4/6, CDK7, and PIM2 in addition to PI3K in vitro and that siphonodictyal B exhibits more potent cytotoxic effects than liphagal against human colon cancer cell lines. Furthermore, treatment with siphonodictyal B resulted in increased PARP cleavage, a larger sub‐G1 fraction, and a larger annexin V‐positive cell population, all of which are indicative of apoptosis induction. As a mechanism of apoptosis induction, we found that siphonodictyal B activates the p38 MAPK pathway, leading the upregulation of proapoptotic factors. Moreover, siphonodictyal B increased ROS levels, thus promoting p38 MAPK pathway activation. NAC, an ROS scavenger, almost completely reversed both the cytotoxic and p38 MAPK pathway‐activating effects of siphonodictyal B. These results indicate that the p38 MAPK pathway might be involved downstream of ROS signaling as part of the mechanism of siphonodictyal B‐induced apoptosis. Finally, siphonodictyal B displayed antitumor effects in a human colon cancer xenograft mouse model and increased p38 phosphorylation in tumor tissue. These results suggest that siphonodictyal B could serve as the basis of a novel anticancer drug.
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Affiliation(s)
- Sonoko Chikamatsu
- Department of Clinical Oncology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Ken Saijo
- Department of Clinical Oncology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan.,Department of Medical Oncology, Tohoku University Hospital, Sendai, Japan
| | - Hiroo Imai
- Department of Clinical Oncology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan.,Department of Medical Oncology, Tohoku University Hospital, Sendai, Japan
| | - Koichi Narita
- Laboratory of Synthetic and Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Yoshifumi Kawamura
- Department of Clinical Oncology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Tadashi Katoh
- Faculty of Pharmaceutical Sciences, Research Center for Drug Discovery, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Chikashi Ishioka
- Department of Clinical Oncology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan.,Department of Medical Oncology, Tohoku University Hospital, Sendai, Japan
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10
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Chen SJ, Chung YC, Chang HL, Chang HP, Chou JL, Lin CC, Chen CH, Hsu CP. Synergistic Effect of Combined Treatment with Longan Flower Extract and 5-Fluorouracil on Colorectal Cancer Cells. Nutr Cancer 2019; 72:209-217. [PMID: 31179754 DOI: 10.1080/01635581.2019.1622739] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
To investigate the influence of longan flower extract (LFE) on the sensitization of colorectal cancer (CRC) cells to 5-fluorouracil (5-FU) treatment, HT-29, Colo 320DM and SW480 cells were treated with LFE and 5-FU alone and in combination, and the cell viability was then assessed by trypan blue exclusion, the cell cycle by propidium iodide staining, the mitochondria membrane potential by rhodamine 123 staining, and the expression levels of associated genes by immunoblotting and quantitative real-time polymerase chain reaction. LFE and 5-FU synergistically inhibited cell proliferation of HT-29 and Colo 320DM cells. Combined treatment also elevated the level of loss of mitochondria membrane potential of these two CRC cells and arrested HT-29 cells in the S phase of the cell cycle, in association with down-regulation of cyclin A mRNA expression. LFE synergistically potentiated chemosensitivity to 5-FU in at least two CRC cell lines. The results indicated that LFE has potential as a novel agent for the sensitization of CRC cells to 5-FU.
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Affiliation(s)
- Szu-Jung Chen
- Department of Radiation Oncology, Taoyuan General Hospital, Ministry of Health and Welfare, Taoyuan, Taiwan
| | | | - Han-Lung Chang
- Department of Surgery, En Chu Kong Hospital, New Taipei, Taiwan
| | - Hsin-Ping Chang
- Department of Biotechnology and Pharmaceutical Technology, Yuanpei University of Medical Technology, Hsinchu, Taiwan
| | - Jui-Ling Chou
- Department of Biotechnology and Pharmaceutical Technology, Yuanpei University of Medical Technology, Hsinchu, Taiwan
| | - Chih-Cheng Lin
- Department of Biotechnology and Pharmaceutical Technology, Yuanpei University of Medical Technology, Hsinchu, Taiwan
| | - Chih-Hsien Chen
- Department of Medical Laboratory Science and Biotechnology, Yuanpei University of Medical Technology, Hsinchu, Taiwan
| | - Chih-Ping Hsu
- Department of Medical Laboratory Science and Biotechnology, Yuanpei University of Medical Technology, Hsinchu, Taiwan
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11
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Hao S, Huo S, Du Z, Yang Q, Ren M, Liu S, Liu T, Zhang G. MicroRNA-related transcription factor regulatory networks in human colorectal cancer. Medicine (Baltimore) 2019; 98:e15158. [PMID: 30985693 PMCID: PMC6485807 DOI: 10.1097/md.0000000000015158] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
OBJECTIVE Colorectal cancer (CRC) is an extremely common gastrointestinal malignancy. The present study aimed to identify microRNAs (miRNAs) and transcription factors (TFs) associated with tumor development. METHODS Three miRNA profile datasets were integrated and analyzed to elucidate the potential key candidate miRNAs in CRC. The starBase database was used to identify the potential targets of common differentially expressed miRNAs (DEMs). Transcriptional Regulatory Element Database and Transcriptional Regulatory Relationships Unraveled by Sentence-based Text databases were used to identify cancer-related TFs and the TF-regulated target genes. Functional and pathway enrichment analyses were performed using the Database for Annotation, Visualization and Integration Discovery (DAVID) database, and the miRNA-TF-gene networks were constructed by Cytoscape. Quantitative reverse transcription polymerase chain reaction (qRT-PCR) was used to detect the expression of genes and miRNAs. RESULTS In total, 14 DEMs were found in CRC. By bioinformatics analysis, 5 DEMs (miR-145, miR-497, miR-30a, miR-31, and miR-20a) and 8 TFs (ELK4 (ETS-family transcription factor), myeloblastosis proto-oncogene like (MYBL)1, MYBL2, CEBPA, PPARA, PPARD, PPARG, and endothelial PAS domain protein (EPAS1)) appeared to be associated with CRC and were therefore used to construct miRNA-TF-gene networks. From the networks, we found that miR-20a might play the most important role as an miRNA in the networks. By qRT-PCR, we demonstrated that miR-20a was significantly upregulated in CRC tissues. We also performed qRT-PCR to identify the expression of miR-20a-related TFs (PPARA, PPARD, PPARG, EPAS1). Three of them, PPARA, PPARG, and EPAS1, were downregulated in CRC tissues, with statistically significant differences, while the downregulation of PPARD in CRC tissues was not significantly different. Pathway enrichment analyses indicated that the phosphoinositide 3-kinase (PI3K)-Akt signaling pathway was the most significantly enriched pathway. Two main elements of the PI3K-Akt signaling pathway, phosphatase and tensin homolog deleted on chromosome 10 and B-cell lymphoma 2-associated agonist of cell death, were demonstrated to be downregulated in CRC. CONCLUSION The present study identified hub miRNAs and miRNA-related TF regulatory networks in CRC, which might be potential targets for the diagnosis and treatment of CRC.
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Affiliation(s)
- Shuhong Hao
- Department of Medical Research Center
- Department of Hematology and Oncology
| | | | - Zhenwu Du
- Department of Medical Research Center
- Department of Orthopedics
| | | | | | - Shui Liu
- Department of Hepatobiliary and Pancreatic Surgery, The Second Hospital of Jilin University, Changchun, Jilin, China
| | | | - Guizhen Zhang
- Department of Medical Research Center
- Department of Orthopedics
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12
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van Weelden G, Bobiński M, Okła K, van Weelden WJ, Romano A, Pijnenborg JMA. Fucoidan Structure and Activity in Relation to Anti-Cancer Mechanisms. Mar Drugs 2019; 17:E32. [PMID: 30621045 PMCID: PMC6356449 DOI: 10.3390/md17010032] [Citation(s) in RCA: 172] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 12/29/2018] [Accepted: 01/02/2019] [Indexed: 02/06/2023] Open
Abstract
Fucoidan is a natural derived compound found in different species of brown algae and in some animals, that has gained attention for its anticancer properties. However, the exact mechanism of action is currently unknown. Therefore, this review will address fucoidans structure, the bioavailability, and all known different pathways affected by fucoidan, in order to formulate fucoidans structure and activity in relation to its anti-cancer mechanisms. The general bioactivity of fucoidan is difficult to establish due to factors like species-related structural diversity, growth conditions, and the extraction method. The main pathways influenced by fucoidan are the PI3K/AKT, the MAPK pathway, and the caspase pathway. PTEN seems to be important in the fucoidan-mediated effect on the AKT pathway. Furthermore, the interaction with VEGF, BMP, TGF-β, and estrogen receptors are discussed. Also, fucoidan as an adjunct seems to have beneficial effects, for both the enhanced effectiveness of chemotherapy and reduced toxicity in healthy cells. In conclusion, the multipotent character of fucoidan is promising in future anti-cancer treatment. However, there is a need for more specified studies of the structure⁻activity relationship of fucoidan from the most promising seaweed species.
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Affiliation(s)
- Geert van Weelden
- Faculty of Science, (Medical) Biology, Radboud University, 6525 XZ Nijmegen, The Netherlands.
- The First Department of Gynecologic Oncology and Gynecology, Medical University of Lublin, 20-081 Lublin, Poland.
| | - Marcin Bobiński
- The First Department of Gynecologic Oncology and Gynecology, Medical University of Lublin, 20-081 Lublin, Poland.
| | - Karolina Okła
- The First Department of Gynecologic Oncology and Gynecology, Medical University of Lublin, 20-081 Lublin, Poland.
| | - Willem Jan van Weelden
- Department of Obstetrics & Gynecology, Radboud University Nijmegen, Medical Centre, 6525 GA Nijmegen, The Netherlands.
| | - Andrea Romano
- Department of Obstetrics and Gynecology, GROW-School for Oncology and Developmental Biology Maastricht University Medical Centre, 6229 HX Maastricht, The Netherlands.
| | - Johanna M A Pijnenborg
- Department of Obstetrics & Gynecology, Radboud University Nijmegen, Medical Centre, 6525 GA Nijmegen, The Netherlands.
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13
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F-box and leucine-rich repeat protein 5 promotes colon cancer progression by modulating PTEN/PI3K/AKT signaling pathway. Biomed Pharmacother 2018; 107:1712-1719. [PMID: 30257389 DOI: 10.1016/j.biopha.2018.08.119] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 08/23/2018] [Accepted: 08/23/2018] [Indexed: 12/16/2022] Open
Abstract
The hyper-activation of PI3K/AKT signaling is common in many kinds of malignant tumors and promotes cell growth. Moreover, FBXL5 is reported to play an important role in the progression of gastric cancer and cervical cancer. In this view, this study aims to explore the function of FBXL5 in the progression of colon cancer and determine if PI3K/AKT signaling pathway involves in this process. Western blotting, RT-PCR, and immunohistochemistry were used to detect the expression pattern of FBXL5 in colon cancer tissues and cell lines. Immunofluorescence, Duolink, and immunoprecipitation (IP) assays were performed to evaluate the interaction between FBXL5 and PI3K/AKT signaling. Results showed that FBXL5 was elevated in colon cancer tissues and cells, which had physical interaction with PTEN protein and negatively regulated its expression, whereas positively modulated PI3K, AKT and mTOR expression and their phosphorylation. Besides, FBXL5 promoted cell proliferation and tumorigenesis and inhibited apoptosis by modulating PTEN/PI3K/AKT signaling. In conclusion, this study demonstrated that FBXL5 functioned as an oncogene in the progression of colon cancer through regulating PTEN/PI3K/AKT signaling.
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14
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Tian J, Yuan L. Sirtuin 6 inhibits colon cancer progression by modulating PTEN/AKT signaling. Biomed Pharmacother 2018; 106:109-116. [PMID: 29957460 DOI: 10.1016/j.biopha.2018.06.070] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 06/12/2018] [Accepted: 06/13/2018] [Indexed: 02/08/2023] Open
Abstract
Decreased expression of the tumor suppressor sirtuin 6 (SIRT6) protein plays a role in tumorigenesis. The aim of this study was to investigate the effects of SIRT6 and its underlying mechanism in colon cancer progression. As shown by immunohistochemistry, Western blotting, and the real-time polymerase chain reaction (RT-PCR), SIRT6 expression was down-regulated in colon cancer tissues and different colon cancer cell lines, and down-regulation of SIRT6 showed a negative correlation with the overall survival of colon cancer patients. To assess the effects of SIRT6 on cell proliferation, apoptosis, invasion, and migration, 3-(4,5-dimethyl-2-yl)-2,5-diphenyltetrazolium bromide (MTT), flow cytometry, transwell, and wound healing assays were carried out, respectively. Results demonstrated that over-expression of SIRT6 inhibited cell proliferation, invasion, and migration and enhanced cell apoptosis. Co-immunoprecipitation (Co-IP) and Western blotting showed that up-regulation of SIRT6 increased the combined quantity of PTEN with SIRT6 proteins, and promoted the expression of PTEN and PIP2, as well as the stability of PTEN. SIRT6 also reduced the ubiquitination of PTEN and decreased protein levels of AKT1, phosphatidylinositol (3,4,5)-trisphosphate (PIP3), mTOR, cyclin d1, and c-myc. In addition, compared with cells over-expressed SIRT6, cell apoptosis was repressed and cell proliferation and tumorigenesis were enhanced in cells with SIRT6 over-expression and PTEN knockdown. In conclusion, the present study confirms that SIRT6 functions as a tumor suppressor gene in colon cancer by modulating PTEN/AKT signaling, which may provide a novel target for the treatment of colon cancer.
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Affiliation(s)
- Junhong Tian
- Department of Colorectal and Anal Surgery, Jining No.1 People's Hospital, Jining, Shandong, China
| | - Leilei Yuan
- Department of Oncology, Jining No.1 People's Hospital, Jining, Shandong, 272000, China. 13905370037.@163.com
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15
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Wang RS, Feng J, Lei YZ, Chen DM, Lian ML. New 3D Supramolecular Ag(I) Coordination Polymer Crystal Containing 2-Quinaldic Acid Radical Biological Ligand: Crystal Structure and Anticancer Activity. CRYSTAL RESEARCH AND TECHNOLOGY 2018. [DOI: 10.1002/crat.201800065] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ren-Shu Wang
- School of Chemistry and Materials Engineering; Liupanshui Normal University; Liupanshui Guizhou 553004 P. R. China
| | - Jing Feng
- School of Chemistry and Materials Engineering; Liupanshui Normal University; Liupanshui Guizhou 553004 P. R. China
| | - Yi-Zhu Lei
- School of Chemistry and Materials Engineering; Liupanshui Normal University; Liupanshui Guizhou 553004 P. R. China
| | - Ding-Mei Chen
- School of Chemistry and Materials Engineering; Liupanshui Normal University; Liupanshui Guizhou 553004 P. R. China
| | - Ming-Lei Lian
- School of Chemistry and Materials Engineering; Liupanshui Normal University; Liupanshui Guizhou 553004 P. R. China
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16
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Liu Z, Sun X, Xiao S, Lin Y, Li C, Hao N, Zhou M, Deng R, Ke S, Zhong Z. Characterization of aptamer-mediated gene delivery system for liver cancer therapy. Oncotarget 2017; 9:6830-6840. [PMID: 29467932 PMCID: PMC5805518 DOI: 10.18632/oncotarget.23564] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Accepted: 10/27/2017] [Indexed: 12/16/2022] Open
Abstract
Liver cancer is a fatal disease with limited therapy options. The recombinant adenovirus expressing tumor-suppressor gene of PTEN (Ad5-PTEN) showed effective antitumor activity against liver cancer. However, its disadvantages produced great limitation on its application, especially its nonspecific and toxicity to normal cells and tissues. The epithelial cell adhesion molecule (EpCAM) is over-expressed in some liver cancer cells and an RNA aptamer EpDT3 could specially target to EpCAM-positive cells. Based on this founding, we aimed to design a kind of gene delivery system of EpDT3-mediated Ad5-PTEN (EpDT3-PEG-Ad5-PTEN, EPAP) in which polyethylene glycol was used to be a linker to conjugate EpDT3 with Ad5-PTEN. This strategy may overcome the disadvantages of naked Ad5-PTEN and enhance the antitumor effect on liver cancer. The SDS-PAGE electrophoresis, TBE-PAGE electrophoresis and fluorescence detection were conducted to confirm the successful preparation of EPAP. Compared with the naked Ad5-PTEN, EPAP showed significant anti-proliferative and anti-migratory activities against HepG2 cells. EPAP also showed selective and precise target ability to EpCAM-positive HepG2 cells in vivo. Therefore, EPAP may be further explored as a novel effective anticancer drug for malignant liver cancer.
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Affiliation(s)
- Zhongbing Liu
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Xiaoduan Sun
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Shuangli Xiao
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China.,Department of Pharmacy, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Yan Lin
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Chunhong Li
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Na Hao
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Meiling Zhou
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China.,Department of Pharmacy, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Ruolan Deng
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Siyun Ke
- Luzhou Senior High School, Luzhou, Sichuan 646000, China
| | - Zhirong Zhong
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
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17
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Waniczek D, Śnietura M, Lorenc Z, Nowakowska-Zajdel E, Muc-Wierzgoń M. Assessment of PI3K/AKT/PTEN signaling pathway activity in colorectal cancer using quantum dot-conjugated antibodies. Oncol Lett 2017; 15:1236-1240. [PMID: 29422975 DOI: 10.3892/ol.2017.7392] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 10/19/2017] [Indexed: 01/18/2023] Open
Abstract
In certain patients with advanced colorectal cancer, loss of phosphatase and tensin homolog deleted on chromosome 10 (PTEN) activity is observed. PTEN is a major gatekeeper gene of the AKT serine/threonine kinase (AKT) signaling pathway responsible for the proliferative activity of cells. The assessment of AKT activity may be a prognostic factor or a predictor of response to the targeted therapies against particular signaling proteins. To precisely identify the cause and the place of the pathway deregulation, it is necessary to identify phosphorylation states and concentrations of several proteins located at different levels of the regulatory cascade. In the present study, we propose the simultaneous use of specific antibodies conjugated with different quantum dots to highlight the nature of AKT/PKB cascade deregulation in patients with colorectal cancer and the loss of PTEN expression in tumor tissue. Fifty patients with colorectal cancer of no specific location were enrolled in the study. The expression of the PTEN protein, and concentrations of phosphorylated/activated forms of 3-Phosphoinositide-dependent kinase 1 (PDK1) and AKT were assessed using quantum dot-conjugated antibodies. In patients with a diminished or complete loss of the PTEN expression in the tumor tissue increased levels of activated/phosphorylated forms of PDK1 (Phospho-PDK1-Ser241) and AKT (Phospho-AKT-Thr308) proteins were found, which are responsible for the permanent activation of the phosphoinositide 3-kinase/AKT/PTEN signaling pathway in certain cases of colorectal cancer.
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Affiliation(s)
- Dariusz Waniczek
- SHS in Katowice, Department of Surgery Propedeutics, Chair of General, Colorectal and Trauma Surgery, Medical University of Silesia, 40-055 Katowice, Poland
| | - Mirosław Śnietura
- Tumor Pathology Department, Maria Sklodowska-Curie Memoria Cancer Center and Institute of Oncology, Gliwice Branch, 41-120 Gliwice, Poland
| | - Zbigniew Lorenc
- SHS in Katowice, Chair of General, Colorectal and Polytrauma Surgery, Medical University of Silesia, 40-055 Katowice, Poland
| | - Ewa Nowakowska-Zajdel
- Department of Nutrition Related Disease Prevention, School of Public Health in Bytom, Medical University of Silesia, 40-055 Katowice, Poland
| | - Małgorzata Muc-Wierzgoń
- Department of Internal Medicine, School of Public Health in Bytom, Medical University of Silesia, 40-055 Katowice, Poland
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18
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Fernandez HR, Lindén SK. The aspirin metabolite salicylate inhibits lysine acetyltransferases and MUC1 induced epithelial to mesenchymal transition. Sci Rep 2017; 7:5626. [PMID: 28717171 PMCID: PMC5514058 DOI: 10.1038/s41598-017-06149-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 06/09/2017] [Indexed: 02/06/2023] Open
Abstract
MUC1 is a transmembrane mucin that can promote cancer progression, and its upregulation correlates with a worse prognosis in colon cancer. We examined the effects of overexpression of MUC1 in colon cancer cells, finding that it induced epithelial to mesenchymal transition (EMT), including enhanced migration and invasion, and increased Akt phosphorylation. When the clones were treated with the aspirin metabolite salicylate, Akt phosphorylation was decreased and EMT inhibited. As the salicylate motif is necessary for the activity of the lysine acetyltransferase (KAT) inhibitor anacardic acid, we hypothesized these effects were associated with the inhibition of KAT activity. This was supported by anacardic acid treatment producing the same effect on EMT. In vitro KAT assays confirmed that salicylate directly inhibited PCAF/Kat2b, Tip60/Kat5 and hMOF/Kat8, and this inhibition was likely involved in the reversal of EMT in the metastatic prostate cancer cell line PC-3. Salicylate treatment also inhibited EMT induced by cytokines, illustrating the general effect it had on this process. The inhibition of both EMT and KATs by salicylate presents a little explored activity that could explain some of the anti-cancer effects of aspirin.
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Affiliation(s)
- Harvey R Fernandez
- Department of Medical Biochemistry and Cell Biology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Sara K Lindén
- Department of Medical Biochemistry and Cell Biology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
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19
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Xiao S, Liu Z, Deng R, Li C, Fu S, Chen G, Zhang X, Ke F, Ke S, Yu X, Wang S, Zhong Z. Aptamer-mediated gene therapy enhanced antitumor activity against human hepatocellular carcinoma in vitro and in vivo. J Control Release 2017; 258:130-145. [PMID: 28522194 DOI: 10.1016/j.jconrel.2017.05.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 05/13/2017] [Indexed: 02/07/2023]
Abstract
A recombinant adenovirus carrying the tumor suppressor gene PTEN (Ad5-PTEN) is an effective antitumor agent against liver cancer. But the application of Ad5-PTEN has been greatly hindered by its auto-immunogenicity, non-specific toxicity to normal tissues, as well as poor stability in blood stream because of neutralizing antibody. Epithelial cell adhesion molecule (EpCAM) is over-expressed in most solid tumors and it has been identified to be a cancer stem cell surface marker in liver cancer. An RNA aptamer EpDT3 could specially bind with EpCAM and target EpCAM-positive cells. Therefore, we hypothesized that developing a novel gene delivery system of EpDT3-modified Ad5-PTEN could overcome the disadvantages of naked Ad5-PTEN and enhance the antitumor effect on hepatocellular carcinoma. We took polyethylene glycol (PEG) as a linker to conjugate EpDT3 with Ad5-PTEN to prepare EpDT3-PEG-Ad5-PTEN (EPAP) by simple chemical synthesis method. We found that the stability of this novel gene delivery system in human blood serum increased about 16-fold compared to the naked adenovirus. Meanwhile, EPAP enhanced gene expression and cellular uptake in HepG2 cells, and showed significant inhibition in cell proliferation and cell migration against hepatocellular carcinoma cells HepG2 while showing no cytotoxicity to normal liver cells L-02, compared with Ad5-PTEN. Importantly, EPAP could induce cell apoptosis and presented superior antitumor activity against aggressive HepG2 xenograft in nude mice but showed no obvious toxicity to the tested mice at the therapy concentration. In conclusion, EpCAM aptamer EpDT3 could significantly enhance the antitumor effect of Ad5-PTEN with high binding ability to EpCAM-positive cells HepG2.
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Affiliation(s)
- Shuangli Xiao
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Zhongbing Liu
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Ruolan Deng
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Chunhong Li
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Shaozhi Fu
- Department of Oncology, the Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Guilan Chen
- The Key Laboratory of Medical Electrophysiology of Ministry of Education, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Xiaoqin Zhang
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Famin Ke
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Siyun Ke
- Luzhou Senior High School, Luzhou, Sichuan 646000, China
| | - Xin Yu
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Shurong Wang
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Zhirong Zhong
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China.
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20
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Bommer UA, Vine KL, Puri P, Engel M, Belfiore L, Fildes K, Batterham M, Lochhead A, Aghmesheh M. Translationally controlled tumour protein TCTP is induced early in human colorectal tumours and contributes to the resistance of HCT116 colon cancer cells to 5-FU and oxaliplatin. Cell Commun Signal 2017; 15:9. [PMID: 28143584 PMCID: PMC5286767 DOI: 10.1186/s12964-017-0164-3] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 01/23/2017] [Indexed: 12/22/2022] Open
Abstract
Background Translationally controlled tumour protein TCTP is an anti-apoptotic protein frequently overexpressed in cancers, where high levels are often associated with poor patient outcome. TCTP may be involved in protecting cancer cells against the cytotoxic action of anti-cancer drugs. Here we study the early increase of TCTP levels in human colorectal cancer (CRC) and the regulation of TCTP expression in HCT116 colon cancer cells, in response to treatment with the anti-cancer drugs 5-FU and oxaliplatin. Methods Using immunohistochemistry, we assessed TCTP levels in surgical samples from adenomas and adenocarcinomas of the colon, compared to normal colon tissue. We also studied the regulation of TCTP in HCT116 colon cancer cells in response to 5-FU and oxaliplatin by western blotting. TCTP mRNA levels were assessed by RT-qPCR. We used mTOR kinase inhibitors to demonstrate mTOR-dependent translational regulation of TCTP under these conditions. Employing the Real-Time Cell Analysis (RTCA) System and the MTS assay, we investigated the effect of TCTP-knockdown on the sensitivity of HCT116 cells to the anti-cancer drugs 5-FU and oxaliplatin. Results 1. TCTP levels are significantly increased in colon adenomas and adenocarcinomas, compared to normal colon tissue. 2. TCTP protein levels are about 4-fold upregulated in HCT116 colon cancer cells, in response to 5-FU and oxaliplatin treatment, whereas TCTP mRNA levels are down regulated. 3. mTOR kinase inhibitors prevented the up-regulation of TCTP protein, indicating that TCTP is translationally regulated through the mTOR complex 1 signalling pathway under these conditions. 4. Using two cellular assay systems, we demonstrated that TCTP-knockdown sensitises HCT116 cells to the cytotoxicity caused by 5-FU and oxaliplatin. Conclusions Our results demonstrate that TCTP levels increase significantly in the early stages of CRC development. In colon cancer cells, expression of this protein is largely upregulated during treatment with the DNA-damaging anti-cancer drugs 5-FU and oxaliplatin, as part of the cellular stress response. TCTP may thus contribute to the development of anti-cancer drug resistance. These findings indicate that TCTP might be suitable as a biomarker and that combinatorial treatment using 5-FU/oxaliplatin, together with mTOR kinase inhibitors, could be a route to preventing the development of resistance to these drugs. Electronic supplementary material The online version of this article (doi:10.1186/s12964-017-0164-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ulrich-Axel Bommer
- Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Northfields Avenue, Wollongong, NSW, 2522, Australia. .,Graduate School of Medicine, University of Wollongong, Northfields Avenue, Wollongong, NSW, 2522, Australia.
| | - Kara L Vine
- Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Northfields Avenue, Wollongong, NSW, 2522, Australia.,School of Biological Sciences, Faculty of Science, Medicine and Health, University of Wollongong, Wollongong, 2522, NSW, Australia
| | - Prianka Puri
- Graduate School of Medicine, University of Wollongong, Northfields Avenue, Wollongong, NSW, 2522, Australia.,Present address: Southeast Sydney Illawarra Area Health Services, Sydney, NSW, Australia
| | - Martin Engel
- Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Northfields Avenue, Wollongong, NSW, 2522, Australia.,School of Biological Sciences, Faculty of Science, Medicine and Health, University of Wollongong, Wollongong, 2522, NSW, Australia
| | - Lisa Belfiore
- Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Northfields Avenue, Wollongong, NSW, 2522, Australia.,School of Biological Sciences, Faculty of Science, Medicine and Health, University of Wollongong, Wollongong, 2522, NSW, Australia
| | - Karen Fildes
- Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Northfields Avenue, Wollongong, NSW, 2522, Australia.,Graduate School of Medicine, University of Wollongong, Northfields Avenue, Wollongong, NSW, 2522, Australia
| | - Marijka Batterham
- School of Mathematics and Applied Statistics, Faculty of Engineering and Information Sciences University of Wollongong, Wollongong, 2522, NSW, Australia
| | - Alistair Lochhead
- Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Northfields Avenue, Wollongong, NSW, 2522, Australia.,Southern IML Pathology Wollongong, 2500, Wollongong, NSW, Australia.,Present address: Syd-Path, St. Vincent's Hospital Darlinghurst, Sydney, 2010, NSW, Australia
| | - Morteza Aghmesheh
- Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Northfields Avenue, Wollongong, NSW, 2522, Australia.,Illawarra Cancer Care Centre, The Wollongong Hospital, Wollongong, 2500, NSW, Australia
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21
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Hou J, Zhang Y, Zhu Z. Gene heterogeneity in metastasis of colorectal cancer to the lung. Semin Cell Dev Biol 2016; 64:58-64. [PMID: 27590223 DOI: 10.1016/j.semcdb.2016.08.034] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Accepted: 08/30/2016] [Indexed: 12/21/2022]
Abstract
Colorectal cancer (CRC) as a heterogeneous disease, is one of the most common and serious cancers with high metastases and mortality. Lung is one of the most common sites of CRC metastases with high heterogeneity between cells, pathways, or molecules. The present review will focus on potential roles of gene heterogeneity in KRAS pathway in the development of CRC metastasis to lung and clinical therapies, which would lead to better understanding of the metastatic control and benefit to the treatment of metastases. KRAS is the central relay for pathways originating at the epidermal growth factor receptor (EGFR) family. KRAS mutation exists in about 40% CRC, associated with higher cumulative incidence of CRC lung metastasis, and acts as an independent predictor of metastasis to lung. Mutations in KRAS can lead to poor response of patients to panitumumab, and inferior progression-free survival. However, most patients with KRAS wild-type tumors still do not respond, which indicates other mutations. Phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha (PIK3CA) mutation was associated with lung metastases in metastatic colorectal cancer. PIK3CA mutation in exon 20 was found to be correlated with patient survival in the metastatic setting after the treatment with cetuximab and chemotherapy. The heterogeneity of KRAS pathway was found in the phosphatase and tensin homologue deleted on chromosome ten loss, disheveled binding antagonist of beta catenin 2 overexpression and increased dual-specificity protein phosphatase 4 expression of CRC lung metastasis.
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Affiliation(s)
- Jiayun Hou
- Zhongshan Hospital Institute of Clinical Science, Fudan University, Shanghai Institute of Clinical Bioinformatics, Biomedical Research Center, Shanghai, China
| | - Yong Zhang
- Zhongshan Hospital Institute of Clinical Science, Fudan University, Shanghai Institute of Clinical Bioinformatics, Biomedical Research Center, Shanghai, China.
| | - Zhitu Zhu
- Jinzhou Hospital of Jinzhou Medical University, JinZhou, China.
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22
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Cristóbal I, Madoz-Gúrpide J, Rojo F, García-Foncillas J. Potential therapeutic value of miR-425-5p in metastatic colorectal cancer. J Cell Mol Med 2016; 20:2213-2214. [PMID: 27396018 PMCID: PMC5082410 DOI: 10.1111/jcmm.12902] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 05/11/2016] [Indexed: 11/30/2022] Open
Affiliation(s)
- Ion Cristóbal
- Translational Oncology Division, Oncohealth Institute, IIS-Fundacion Jimenez Diaz-UAM, University Hospital "Fundacion Jimenez Diaz", Madrid, Spain.
| | - Juan Madoz-Gúrpide
- Pathology Department, IIS-Fundacion Jimenez Diaz-UAM, University Hospital "Fundacion Jimenez Diaz", Madrid, Spain
| | - Federico Rojo
- Pathology Department, IIS-Fundacion Jimenez Diaz-UAM, University Hospital "Fundacion Jimenez Diaz", Madrid, Spain
| | - Jesús García-Foncillas
- Translational Oncology Division, Oncohealth Institute, IIS-Fundacion Jimenez Diaz-UAM, University Hospital "Fundacion Jimenez Diaz", Madrid, Spain.
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23
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Ágoston EI, Micsik T, Ács B, Fekete K, Hahn O, Baranyai Z, Dede K, Bodoky G, Bursics A, Kulka J, Krenács T, Győrffy B, Harsányi L, Szász AM. In depth evaluation of the prognostic and predictive utility of PTEN immunohistochemistry in colorectal carcinomas: performance of three antibodies with emphasis on intracellular and intratumoral heterogeneity. Diagn Pathol 2016; 11:61. [PMID: 27392434 PMCID: PMC4939017 DOI: 10.1186/s13000-016-0508-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 06/25/2016] [Indexed: 01/13/2023] Open
Abstract
Background Phosphatase and tensin homolog deleted in chromosome 10 (PTEN) loss of function is frequently detected in advanced colorectal cancer. Its detection is thought to have prognostic significance and it is being considered to predict responsiveness to anti-EGFR therapy. Unfortunately, while immunohistochemical assessment of PTEN expression is widespread, it lacks standardization and the results are hardly comparable across the available publications. Methods Retrospectively collected, formalin-fixed and paraffin-embedded colorectal tumor tissue samples from 55 patients were combined into tissue microarray (TMA) blocks. We used three different PTEN antibodies to determine the frequency, intensity and intracellular pattern of PTEN immunohistochemical labeling: Neomarkers, Dako and CellSignaling. We evaluated the aforementioned parameters in selected regions of colorectal cancers and in their lymph node metastases by using three scoring methods that take into consideration both staining frequency and intensity (H1-H3-score). We also evaluated intracellular localization. Results The Dako and CellSignaling antibodies stained predominantly cytoplasms, while the Neomarkers antibody specifically stained cell nuclei. PTEN H-scores were significantly lower in all tumor areas as compared to the normal colonic mucosa based on staining with the DAKO and CellSignaling antibodies. Intratumoral regional differences or differences between matching tumors and metastases were not detected with any of the antibodies. Neither Dako, neither CellSignaling, nor the Neomarkers antibodies revealed a significant correlation between PTEN expression and pT, Dukes/MAC and clinical stage. KRAS status, histological grade correlated with PTEN H-scores based on staining with the Neomarkers antibody. PTEN H-scores did not correlate with MMR status. PTEN H-scores did not show any correlation with relapse-free survival based on staining with either antibody. Conclusions While PTEN expression decreased in colorectal cancer according to two antibodies, neither of the three applied PTEN antibodies could justify significant correlation with clinicopathological data, nor had prognostic value. Thus, we might conclude that immunohistochemical PTEN investigation remains a challenge requiring more standardized evaluation on larger number of cases to clarify its utility as a prognostic and predictive tool in CRC. The standardization of immunohistochemical method is key in the evaluation process, which is further discussed. Electronic supplementary material The online version of this article (doi:10.1186/s13000-016-0508-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Emese Irma Ágoston
- Department of Surgery, Semmelweis University, 78 Üllői út, Budapest, 1082, Hungary
| | - Tamás Micsik
- Department of Pathology and Experimental Cancer Research, Semmelweis University, 26 Üllői út, Budapest, 1085, Hungary
| | - Balázs Ács
- Department of Pathology, Semmelweis University, 93 Üllői út, Budapest, 1091, Hungary
| | - Krisztina Fekete
- Department of Surgery, Semmelweis University, 78 Üllői út, Budapest, 1082, Hungary
| | - Oszkár Hahn
- Department of Surgery, Semmelweis University, 78 Üllői út, Budapest, 1082, Hungary
| | - Zsolt Baranyai
- Department of Surgery, Semmelweis University, 78 Üllői út, Budapest, 1082, Hungary
| | - Kristóf Dede
- Department of Surgery and Oncological Surgery, Uzsoki Teaching Hospital, 196 Róna utca, Budapest, 1145, Hungary
| | - György Bodoky
- Department of Oncology, Szent István Hospital, 1 Nagyvárad tér, Budapest, 1097, Hungary
| | - Attila Bursics
- Department of Surgery and Oncological Surgery, Uzsoki Teaching Hospital, 196 Róna utca, Budapest, 1145, Hungary
| | - Janina Kulka
- Department of Pathology, Semmelweis University, 93 Üllői út, Budapest, 1091, Hungary
| | - Tibor Krenács
- Department of Pathology and Experimental Cancer Research, Semmelweis University, 26 Üllői út, Budapest, 1085, Hungary
| | - Balázs Győrffy
- MTA-TTK Lendület Cancer Biomarker Research Group, Magyar tudósok körútja 2, Budapest, 1117, Hungary
| | - László Harsányi
- Department of Surgery, Semmelweis University, 78 Üllői út, Budapest, 1082, Hungary.
| | - A Marcell Szász
- Department of Pathology, Semmelweis University, 93 Üllői út, Budapest, 1091, Hungary. .,MTA-TTK Lendület Cancer Biomarker Research Group, Magyar tudósok körútja 2, Budapest, 1117, Hungary.
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Sun J, Zhou J, Dong M, Sheng W. Dysregulation of MicroRNA-543 expression in colorectal cancer promotes tumor migration and invasion. Mol Carcinog 2016; 56:250-257. [PMID: 27148794 DOI: 10.1002/mc.22489] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2015] [Revised: 03/24/2016] [Accepted: 04/11/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Jian Sun
- Department of General Surgery; Gastrointestinal Surgery; The First Hospital; China Medical University; Shenyang Liaoning Province China
- Department of General Surgery; Colorectal & Anal Surgery,; The People's Hospital of Liaoning Province; Shenyang Liaoning Province China
| | - Jianping Zhou
- Department of General Surgery; Gastrointestinal Surgery; The First Hospital; China Medical University; Shenyang Liaoning Province China
| | - Ming Dong
- Department of General Surgery; Gastrointestinal Surgery; The First Hospital; China Medical University; Shenyang Liaoning Province China
| | - Weiwei Sheng
- Department of General Surgery; Gastrointestinal Surgery; The First Hospital; China Medical University; Shenyang Liaoning Province China
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Zhu DY, Li XN, Qi Y, Liu DL, Yang Y, Zhao J, Zhang CY, Wu K, Zhao S. MiR-454 promotes the progression of human non-small cell lung cancer and directly targets PTEN. Biomed Pharmacother 2016; 81:79-85. [PMID: 27261580 DOI: 10.1016/j.biopha.2016.03.029] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 03/22/2016] [Accepted: 03/23/2016] [Indexed: 02/07/2023] Open
Abstract
PURPOSE MicroRNA-454 has been proven dysregulated in some human malignancies and correlated with tumor progression. However, its expression and function in non-small cell lung cancer (NSCLC) is still unclear. Thus, the aim of this study was to explore the effects of miR-454 in NSCLC tumorigenesis and development. METHODS Using quantitative RT-PCR, we detected miR-454 expression in NSCLC cell lines and primary tumor tissues. The association of miR-454 expression with clinicopathological factors and prognosis was also analyzed. Then, the effects of miR-454 on the biological behavior of NSCLC cells were investigated. At last, the potential regulatory function of miR-454 on PTEN expression was confirmed. RESULTS miR-454 was found to be up-regulated in NSCLC tissues and cell lines. High miR-454 expression was closely correlated with lymph node metastasis, advanced TNM stage, and shorter overall survival. Multivariate regression analysis corroborated that miR-454 overexpression was an independent unfavourable prognostic factor for patients with NSCLC. Down-regulation of miR-454 could significantly reduce NSCLC cell proliferation, enhance cell apoptosis, and impair cell invasion and migration in vitro, while up-regulation of miR-454 showed opposite effects. Further, PTEN was confirmed as a direct target of miR-454 by using Luciferase Reporter Assay. CONCLUSIONS These findings indicate that miR-454 may act as an oncogene in NSCLC and would serve as a potential therapy target for this disease.
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Affiliation(s)
- Deng-Yan Zhu
- Department of Thoracic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, PR China
| | - Xiang-Nan Li
- Department of Thoracic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, PR China
| | - Yu Qi
- Department of Thoracic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, PR China
| | - Dong-Lei Liu
- Department of Thoracic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, PR China
| | - Yang Yang
- Department of Thoracic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, PR China
| | - Jia Zhao
- Department of Thoracic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, PR China
| | - Chun-Yang Zhang
- Department of Thoracic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, PR China
| | - Kai Wu
- Department of Thoracic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, PR China
| | - Song Zhao
- Department of Thoracic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, PR China.
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Wu QX, Yuan SX, Ren CM, Yu Y, Sun WJ, He BC, Wu K. Oridonin upregulates PTEN through activating p38 MAPK and inhibits proliferation in human colon cancer cells. Oncol Rep 2016; 35:3341-8. [PMID: 27108927 DOI: 10.3892/or.2016.4735] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Accepted: 01/12/2016] [Indexed: 11/06/2022] Open
Abstract
Oridonin (ORI) has been reported as an antiproliferation and apoptosis-inducing natural product in various cancer cells. However, the exact molecular mechanism underlying these effects remains unclear. In the present study, we demonstrated the antiproliferation effect of ORI in HCT116 cells, and analyzed the possible molecular mechanism which mediates this effect. We found that ORI inhibits proliferation, induces cell cycle arrest and apoptosis in HCT116 cells, thus also tumor growth. Mechanically, we found that ORI has no substantial effect on mRNA expression of phosphatase and tensin homologue (PTEN), but increases the total protein level of PTEN and markedly reduces the phosphorylation of PTEN; Exogenous expression of PTEN potentiates the anticancer effect of ORI, while knockdown of PTEN attenuates it. ORI also increases the phosphorylation of p38 MAPK, and p38 MAPK-specific inhibitor reduces the antiproliferation effect ORI in HCT116 cells. Moreover, inhibition of p38 MAPK increases the phosphorylation of PTEN, and reverses ORI-induced decrease of PTEN phosphorylation. Our findings suggested that ORI may be a potential anticancer drug for colon cancer, this effect may be mediated by enhancing the function of PTEN through reducing its phosphorylation, which may be resulted from the ORI-induced activation of p38 MAPK.
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Affiliation(s)
- Qiu-Xiang Wu
- Chongqing Municipal Key Laboratory of Higher Education Institutions for Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Yuzhong, Chongqing 400016, P.R. China
| | - Shuang-Xue Yuan
- Chongqing Municipal Key Laboratory of Higher Education Institutions for Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Yuzhong, Chongqing 400016, P.R. China
| | - Chun-Mei Ren
- Chongqing Municipal Key Laboratory of Higher Education Institutions for Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Yuzhong, Chongqing 400016, P.R. China
| | - Yu Yu
- Chongqing Municipal Key Laboratory of Higher Education Institutions for Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Yuzhong, Chongqing 400016, P.R. China
| | - Wen-Juan Sun
- Chongqing Municipal Key Laboratory of Higher Education Institutions for Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Yuzhong, Chongqing 400016, P.R. China
| | - Bai-Cheng He
- Chongqing Municipal Key Laboratory of Higher Education Institutions for Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Yuzhong, Chongqing 400016, P.R. China
| | - Ke Wu
- Chongqing Municipal Key Laboratory of Higher Education Institutions for Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Yuzhong, Chongqing 400016, P.R. China
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Yazdani Y, Farazmandfar T, Azadeh H, Zekavatian Z. The prognostic effect of PTEN expression status in colorectal cancer development and evaluation of factors affecting it: miR-21 and promoter methylation. J Biomed Sci 2016; 23:9. [PMID: 26787105 PMCID: PMC4717643 DOI: 10.1186/s12929-016-0228-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Accepted: 01/12/2016] [Indexed: 02/07/2023] Open
Abstract
Background PTEN is a tumor suppressor gene which is involved in cellular proliferation, differentiation, and apoptosis. Loss or down-regulation of PTEN plays an important role in human cancers development. In this study, we investigated the effect of miR-21 and promoter methylation on the PTEN expression status in CRC tissues and analyzed association of the PTEN expression status with clinicopathological features in patients with CRC. Results The PTEN expression was positively detected in 67.2 % CRC tissues and all adjacent non-cancerous samples. PTEN mRNA level was negatively correlated with miR-21 level (r = −0.595, P < 0.001). PTEN expression was also correlated directly with the PTEN mRNA level (r = 0.583, P < 0.001) and conversely with miR-21 level (r = −0.632, P < 0.001). PTEN Promoter methylation was significantly associated with PTEN expression status (p = 0.013). PTEN expression was negatively associated with tumor size (p = 0.007) and advanced tumor stage (P = 0.011). Multivariate analysis indicated that tumor stage, tumor differentiation and PTEN expression status were independent prognostic factors for overall carcinoma in CRC patients (P < 0.05). The Kaplan-Meier curve indicated a negative correlation between PTEN expression levels and survival of CRC patients (P = 0.013). Conclusions This study suggests a high frequency of miR-21 overexpression and aberrant promoter methylation in down-regulation of PTEN expression in colorectal carcinoma. Loss of PTEN may be a prognostic factor for patients with CRC.
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Affiliation(s)
- Yaghoub Yazdani
- Infectious Diseases Research Center and Laboratory Science Research Center, Golestan University of Medical Sciences, Gorgan, Iran.
| | - Touraj Farazmandfar
- Infectious Diseases Research Center and Laboratory Science Research Center, Golestan University of Medical Sciences, Gorgan, Iran. .,Student Research Committee, Golestan University of Medical Sciences, P.O. Box: 4934174611, Gorgan, Iran.
| | - Hossein Azadeh
- Department of Internal Medicine, Mazandaran University of Medical sciences, Sari, Iran.
| | - Zeinab Zekavatian
- Department of Genetics, Tehran Medical Sciences branch, Islamic Azad University, Tehran, Iran.
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Abstract
PTEN subcellular localization is fundamental in the execution of the distinct PTEN biological activities, including not only its PI(3,4,5)P3 phosphatase activity when associated to membranes but also its subcellular compartment-specific interactions with regulatory and effector proteins, including those exerted in the nucleus. As a consequence, PTEN subcellular localization is tightly regulated in vivo by both intrinsic and extrinsic mechanisms. The plasma membrane/nucleus/cytoplasm partitioning of PTEN has been the focus of several studies, both from a mechanistic and from a disease-association point of view. Here, we summarize the current knowledge on PTEN plasma membrane/nucleus/cytoplasm distribution, and present subcellular fractionation, immunofluorescence, and immunohistochemical methods to study the distribution and shuttling of PTEN between these subcellular compartments.
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Affiliation(s)
- Anabel Gil
- Centro de Investigación Príncipe Felipe, Valencia, 46013, Spain
- Department of Hematology and Medical Oncology, Biomedical Research Institute INCLIVA, Valencia, 46010, Spain
| | - José I López
- Department of Pathology, Cruces University Hospital, University of the Basque Country (UPV/EHU), Barakaldo, 48903, Spain
- Biocruces Health Research Institute, Plaza de Cruces s/n, Barakaldo, Bizkaia, 48903, Spain
| | - Rafael Pulido
- Centro de Investigación Príncipe Felipe, Valencia, 46013, Spain.
- Biocruces Health Research Institute, Plaza de Cruces s/n, Barakaldo, Bizkaia, 48903, Spain.
- IKERBASQUE, Basque Foundation for Science, Bilbao, 48013, Spain.
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Bufalin Inhibits HCT116 Colon Cancer Cells and Its Orthotopic Xenograft Tumor in Mice Model through Genes Related to Apoptotic and PTEN/AKT Pathways. Gastroenterol Res Pract 2015; 2015:457193. [PMID: 26770191 PMCID: PMC4685085 DOI: 10.1155/2015/457193] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 05/23/2015] [Accepted: 05/27/2015] [Indexed: 12/21/2022] Open
Abstract
Aims. To investigate the anticolorectal cancer (CRC) effects of Bufalin, a bioactive polyhydroxysteroid from Venenum Bufonis, using HCT116 human CRC cell and an established orthotopic xenograft model in mice, and to explore the mechanisms of action. Material and Methods. Cultured HCT116 cells or BALB/c mice with orthotopic tumor were treated by Bufalin (positive control: 5-FU). Cell proliferation, apoptosis, and cycling were determined by MTT, Annexin V/PI staining, and flow cytometry, respectively. In mice, tumor inhibition rate and animal survival were calculated. The expressions of PTEN/phosphate-PTEN, AKT/phosphate-AKT, Bad, Bcl-xl, Bax, or Caspase-3 in cells and/or tumors were determined by Western blot or immunohistochemical staining. Results. Bufalin significantly inhibited cell proliferation and induced cell apoptosis and cycle arrest in a dose/time-dependent manner. In the animal model, Bufalin treatment resulted in significant inhibition of tumor growth and prolonged survival. In the Bufalin-treated cultured cells and/or xenograft tumors, the expressions of PTEN, Bad, Bax, and Caspase-3 were significantly increased, while p-AKT and Bcl-xL significantly decreased. Conclusions. Our results indicate that Bufalin inhibit cell proliferation and orthotopic tumor growth by inducing cell apoptosis through the intrinsic apoptotic pathway, which is of pivotal significance in the identification of an anticancer drug that may synergize with Bufalin.
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Guo L, Wu H, Zhu J, Zhang C, Ma J, Lan J, Xie X. Genetic variations in the PI3K/AKT pathway predict platinum-based neoadjuvant chemotherapeutic sensitivity in squamous cervical cancer. Life Sci 2015; 143:217-24. [DOI: 10.1016/j.lfs.2015.11.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 10/23/2015] [Accepted: 11/11/2015] [Indexed: 10/22/2022]
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Pan J, Cheng L, Bi X, Zhang X, Liu S, Bai X, Li F, Zhao AZ. Elevation of ω-3 Polyunsaturated Fatty Acids Attenuates PTEN-deficiency Induced Endometrial Cancer Development through Regulation of COX-2 and PGE2 Production. Sci Rep 2015; 5:14958. [PMID: 26468779 PMCID: PMC4606560 DOI: 10.1038/srep14958] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 09/11/2015] [Indexed: 12/11/2022] Open
Abstract
Endometrial cancer is one of the most common gynecologic malignancies. Phosphatase and tensin homologue (PTEN)-mutation is frequently identified in endometrial cancer patients. Although high dietary intake of ω-3 polyunsaturated fatty acids (PUFAs) has been associated with reduced risk of endometrial cancer, the underlying mechanisms is still unknown. To this end, we evaluated the impact of ω-3 PUFAs using several endometrial cancer cellular and animal models. While ~27% and 40% of heterozygotic PTEN mutant mice developed endometrial cancer and atypical complex hyperplasia, respectively, none of the PTEN(+/-) mice developed cancer when we overexpressed an mfat-1 transgene, which allowed endogenous production of ω-3 PUFAs. Fish oil-enriched diet or expression of mfat-1 transgene significantly inhibited the growth of xenograft tumor derived from RL95-2 cells bearing a PTEN null mutation. At cellular level, ω-3 PUFAs treatment decreased the viability of RL95-2 cells, AKT phosphorylation, and cyclin D1 expression. These molecular events are primarily mediated through reduction of cyclooxygenase-2 (COX-2) expression and prostaglandin E2 (PGE2) production. Exogenous PGE2 treatment completely blunted the impact of ω-3 PUFAs on endometrial cancer. Thus, we revealed the direct inhibitory effects of ω-3 PUFAs on endometrial cancer development and the underlying mechanisms involving reduction of COX-2 and PGE2.
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Affiliation(s)
- Jinshun Pan
- The Center of Metabolic Disease Research, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
| | - Lixian Cheng
- The Center of Metabolic Disease Research, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
| | - Xinyun Bi
- The Center of Metabolic Disease Research, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
| | - Xin Zhang
- The Center of Metabolic Disease Research, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
| | - Shanshan Liu
- The Center of Metabolic Disease Research, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
| | - Xiaoming Bai
- Cancer Center, Department of Pathology, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
| | - Fanghong Li
- The Center of Metabolic Disease Research, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
| | - Allan Z. Zhao
- The Center of Metabolic Disease Research, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
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Lin PC, Lin JK, Lin HH, Lan YT, Lin CC, Yang SH, Chen WS, Liang WY, Jiang JK, Chang SC. A comprehensive analysis of phosphatase and tensin homolog deleted on chromosome 10 (PTEN) loss in colorectal cancer. World J Surg Oncol 2015; 13:186. [PMID: 25986931 PMCID: PMC4489205 DOI: 10.1186/s12957-015-0601-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 04/29/2015] [Indexed: 01/24/2023] Open
Abstract
Background Alterations of PTEN, regulator of the PTEN/PI3K-AKT pathway, are common in several types of cancer. This study aimed to do comprehensive analysis of PTEN in colorectal cancer patients. Methods Totally, 198 colorectal cancer patients who received surgery at Taipei Veterans General Hospital from 2006 to 2008 were enrolled. Mutations, loss of protein expression, promoter hypermethylation, and DNA copy number of PTEN were analyzed by sequencing, immunohistochemistry, methylation-specific polymerase chain reaction PCR, and quantitative (QPCR), respectively, and correlated with clinicopathological features and patients’ outcome. Results Genomic mutations, loss of protein expression, promoter hypermethylation, and decreased DNA copy number of PTEN were found in 4 (2.02 %), 68 (34.3 %), 54 (27.3 %), and 36 (18.2 %) tumors, respectively. Of these 68 tumors with loss expression of PTEN, 34 (50 %) tumors had promoter methylation and 18 (26.5 %) had decreased DNA copy number. All four tumors with PTEN mutations demonstrated loss of PTEN expression. In the stage I disease, frequency of loss of PTEN expression was 20 % and significantly increased to 56.9 % in stage IV disease. Either loss expression of PTEN, PTEN hypermethylation or decreased PTEN copy number was not associated with colorectal cancer (CRC) patients’ outcome. Conclusions PTEN alterations were found in up to one-third of colorectal cancers but did not impact CRC patients’ prognosis. Electronic supplementary material The online version of this article (doi:10.1186/s12957-015-0601-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Pei-Ching Lin
- Department of Clinical Pathology, Yang-Ming Branch, Taipei City Hospital, Taipei, Taiwan.
| | - Jen-Kou Lin
- Division of Colon and Rectal Surgery, Department of Surgery, Taipei Veterans General Hospital, No.201, 2nd section, ShiPai Road, Taipei, Taiwan. .,Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.
| | - Hung-Hsin Lin
- Division of Colon and Rectal Surgery, Department of Surgery, Taipei Veterans General Hospital, No.201, 2nd section, ShiPai Road, Taipei, Taiwan. .,Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.
| | - Yuan-Tzu Lan
- Division of Colon and Rectal Surgery, Department of Surgery, Taipei Veterans General Hospital, No.201, 2nd section, ShiPai Road, Taipei, Taiwan. .,Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.
| | - Chun-Chi Lin
- Division of Colon and Rectal Surgery, Department of Surgery, Taipei Veterans General Hospital, No.201, 2nd section, ShiPai Road, Taipei, Taiwan. .,Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.
| | - Shung-Haur Yang
- Division of Colon and Rectal Surgery, Department of Surgery, Taipei Veterans General Hospital, No.201, 2nd section, ShiPai Road, Taipei, Taiwan. .,Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.
| | - Wei-Shone Chen
- Division of Colon and Rectal Surgery, Department of Surgery, Taipei Veterans General Hospital, No.201, 2nd section, ShiPai Road, Taipei, Taiwan. .,Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.
| | - Wen-Yi Liang
- Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan. .,Department of Pathology, Taipei Veterans General Hospital, Taipei, Taiwan.
| | - Jeng-Kai Jiang
- Division of Colon and Rectal Surgery, Department of Surgery, Taipei Veterans General Hospital, No.201, 2nd section, ShiPai Road, Taipei, Taiwan. .,Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.
| | - Shih-Ching Chang
- Division of Colon and Rectal Surgery, Department of Surgery, Taipei Veterans General Hospital, No.201, 2nd section, ShiPai Road, Taipei, Taiwan. .,Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.
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Bochis OV, Fetica B, Vlad C, Achimas-Cadariu P, Irimie A. The Importance of Ubiquitin E3 Ligases, SCF and APC/C, in Human Cancers. ACTA ACUST UNITED AC 2015; 88:9-14. [PMID: 26528041 PMCID: PMC4508606 DOI: 10.15386/cjmed-377] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Accepted: 01/16/2015] [Indexed: 12/14/2022]
Abstract
A normal evolution of the cell-cycle phases consists of multiple consecutive events, which makes it a highly complex process. Its preservation is regulated by Cyclin-Cdks (cyclin-dependent kinases) interactions and protein degradation, which is often controlled by the ubiquitin-mediated proteolysis. The goal of this review is to emphasize the most important features of the regulation of the cell-cycle involved in cancerogenesis, by presenting the involvement of E3 ubiquitin ligases SCF (Skp1-Cul1-F-box protein) and APC/C (Anaphase-promoting complex/cyclosome) in human malignancies. Also, we discuss the importance of the ubiquitin proteasome pathway blockade in cancer treatment. We know that a better understanding of the regulatory biology of the cell cycle can lead to the development of new target therapies for cancer.
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Affiliation(s)
- Ovidiu Vasile Bochis
- Department of Medical Oncology, "Prof. Dr. Ion Chiricuta" Institute of Oncology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Bogdan Fetica
- Department of Pathology, "Prof. Dr. Ion Chiricuta" Institute of Oncology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Catalin Vlad
- Department of Surgery, "Prof. Dr. Ion Chiricuta" Institute of Oncology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Patriciu Achimas-Cadariu
- Department of Surgery, "Prof. Dr. Ion Chiricuta" Institute of Oncology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Alexandru Irimie
- Department of Surgery, "Prof. Dr. Ion Chiricuta" Institute of Oncology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
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Bendib M, Badescu A, Handra-Luca A. PTEN expression in colorectal adenomas: relationship to morphology and cell heterogeneity. Pathol Res Pract 2014; 211:248-51. [PMID: 25596996 DOI: 10.1016/j.prp.2014.12.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Revised: 10/28/2014] [Accepted: 12/05/2014] [Indexed: 01/09/2023]
Abstract
INTRODUCTION Colorectal adenomas are the most frequent benign colorectal tumors. These tumors are characterized by dysplasia, low and high grade, the latter having the potential to evolve to adenocarcinoma. The aim of this study was to study the expression patterns of PTEN protein in a series of colorectal adenomas and the relationships to cell proliferation and CD133, marker of stem phenotype. METHODS Colorectal adenomas were studied for the immunohistochemical expression of PTEN on tissue microarrays. PTEN expression was analysed with regard to morphological features and with regard to the Ki67 and CD133-positive cell compartments by using the Kendall rank-correlation test. RESULTS PTEN was expressed in 92% adenomas, either in a cytoplasmic or nuclear pattern. Cytoplasmic PTEN was correlated to cytoplasmic CD133 (p = 0.02, tau 0.191) while nuclear PTEN to decreased adenoma size and to tubular architecture (p = 0.01, τ-0.184 and p = 0.01, τ-0.183). Nuclear PTEN was also correlated to low grade intraepithelial neoplasia, while global PTEN (nuclear or cytoplasmic) was correlated to the presence of a decreased Ki67-positive component but with marginal significance (p = 0.06, τ-0.144 and p = 0.07, τ-0.213). CONCLUSION The results of this study suggest a role for PTEN in colorectal adenoma morphogenesis and cell protein heterogeneity, being correlated to decreased size, tubular architecture and a high CD133-positive component.
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Affiliation(s)
- Mouna Bendib
- Service d'Anatomie pathologique, APHP Université Paris Nord Sorbonne Cité, 125 rue Stalingrad, 93009 Bobigny, France
| | - Alina Badescu
- Service d'Anatomie pathologique, APHP Université Paris Nord Sorbonne Cité, 125 rue Stalingrad, 93009 Bobigny, France; Universitatea de Medicina Craiova, Strada Petru Rareş 2-4, 200349 Craiova, Romania
| | - Adriana Handra-Luca
- Service d'Anatomie pathologique, APHP Université Paris Nord Sorbonne Cité, 125 rue Stalingrad, 93009 Bobigny, France.
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Li J, Yin LL, Su KL, Zhang GF, Wang J. Concomitant depletion of PTEN and p27 and overexpression of cyclin D1 may predict a worse prognosis for patients with post-operative stage II and III colorectal cancer. Oncol Lett 2014; 8:1543-1550. [PMID: 25202365 PMCID: PMC4156215 DOI: 10.3892/ol.2014.2350] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Accepted: 05/29/2014] [Indexed: 01/31/2023] Open
Abstract
Prognostic markers for colorectal cancer (CRC) have not yet been fully investigated. Phosphatase and tensin homolog (PTEN), p27 and Cyclin D1 play significant roles in tumorigenesis and cell cycle regulation, and therefore require evaluation for their prognostic value in this disease. The aim of the present study was to assess the prognostic value of the single and combined expression of PTEN, p27 and Cyclin D1 in CRC patients. Protein expression levels of PTEN, p27 and Cyclin D1 were examined by immunohistochemistry from 61 patients with CRC in either stage II or III. In the CRC tissues, the frequencies of PTEN(−), p27(−) and Cyclin D1(+) expression were 42.62% (26/61), 32.79% (20/61) and 45.90% (28/61), respectively. Depletion of PTEN and p27 was more common with respect to stage III, low grade and lymph node metastasis compared with stage II, moderate grade and no lymph node metastasis (P<0.05). Cyclin D1-positive expression was frequently detected in CRC of stage III, with lymph node metastasis and deeper invasion (P<0.05). The depletion of PTEN was significantly correlated with the loss of p27 (P<0.001) and with the increased expression of Cyclin D1 (P<0.001). PTEN(−) and/or p27(−) expression was significantly correlated with Cyclin D1(+) expression (P<0.05). Combined PTEN(−)/p27(−)/Cyclin D1(+) expression was correlated with a significant decrease in overall survival time (P<0.05). Combined p27(−) and Cyclin D1(+) expression indicated a worse overall survival time than other combined expression patterns. These findings indicate that the single expression of PTEN(−), p27(−) and Cyclin D1(+) and the combined detection of p27(−) and Cyclin D1(+) may be used as prognostic markers for overall survival time in CRC.
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Affiliation(s)
- Jing Li
- Department of Oncology, The Fourth People's Hospital of Jinan, Jinan, Shandong 250031, P.R. China
| | - Lin-Lin Yin
- Department of Oncology, The Fourth People's Hospital of Jinan, Jinan, Shandong 250031, P.R. China
| | - Ke-Li Su
- Department of Oncology, The Fourth People's Hospital of Jinan, Jinan, Shandong 250031, P.R. China
| | - Gang-Feng Zhang
- Department of Oncology, The Fourth People's Hospital of Jinan, Jinan, Shandong 250031, P.R. China
| | - Jing Wang
- Department of Oncology, The Fourth People's Hospital of Jinan, Jinan, Shandong 250031, P.R. China
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Zhang YJ, Li AJ, Han Y, Yin L, Lin MB. Inhibition of Girdin enhances chemosensitivity of colorectal cancer cells to oxaliplatin. World J Gastroenterol 2014; 20:8229-8236. [PMID: 25009397 PMCID: PMC4081697 DOI: 10.3748/wjg.v20.i25.8229] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Revised: 03/09/2014] [Accepted: 04/16/2014] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the effect of Girdin knockdown on the chemosensitivity of colorectal cancer cells to oxaliplatin and the possible mechanisms involved.
METHODS: Four siRNAs targeting Girdin were transfected into the chemoresistant colorectal cancer cell line DLD1. Real-time polymerase chain reaction (PCR) was employed to assess Girdin mRNA expression and the most effective siRNA was chosen for conversion into shRNA. Then, DLD1 cells were infected with lentiviruses expressing the Girdin shRNA and a scramble control, respectively, and Girdin mRNA and protein expression levels were assessed by real-time PCR and Western blotting. Furthermore, microarray experiments were used to assess global gene expression profile after Girdin suppression in DLD1 cells. Finally, the cytotoxic effect of simultaneous treatment with oxaliplatin and adriamycin (an inhibitor of a significantly downregulated gene after Girdin suppression in DLD1 cells) was examined by MTT assay.
RESULTS: The most effective siRNA suppressed Girdin expression with an inhibition efficiency of 57%. Compared with the scramble control, DLD1 cells infected with the Girdin shRNA displayed decreased Girdin mRNA and protein levels (P < 0.05), and Girdin knockdown significantly enhanced chemosensitivity to oxaliplatin in colorectal cancer cells (P < 0.05). Microarray data revealed that 381 and 162 genes were upregulated and downregulated in response to Girdin reduction, respectively, with ratios > 1.2 or < 0.8 (P < 0.01). Interestingly, TOP2B (DNA topoisomerase 2-β) was downregulated (ratio = 0.78, P = 0.0001) and oxaliplatin/adriamycin combination resulted in increased cell death compared with treatments with individual agents (P < 0.05).
CONCLUSION: Girdin knockdown enhances chemosensitivity of colorectal cancer cells to oxaliplatin via TOP2B down-regulation. These findings provide a promising approach to overcome the chemoresistance of colorectal cancer cells.
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Patel M, Gomez NC, McFadden AW, Moats-Staats BM, Wu S, Rojas A, Sapp T, Simon JM, Smith SV, Kaiser-Rogers K, Davis IJ. PTEN deficiency mediates a reciprocal response to IGFI and mTOR inhibition. Mol Cancer Res 2014; 12:1610-20. [PMID: 24994750 DOI: 10.1158/1541-7786.mcr-14-0006] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
UNLABELLED Recent evidence implicates the insulin-like growth factor (IGF) pathway in development of Ewing sarcoma, a highly malignant bone and soft-tissue tumor that primarily affects children and young adults. Despite promising results from preclinical studies of therapies that target this pathway, early-phase clinical trials have shown that a significant fraction of patients do not benefit, suggesting that cellular factors determine tumor sensitivity. Using FAIRE-seq, a chromosomal deletion of the PTEN locus in a Ewing sarcoma cell line was identified. In primary tumors, PTEN deficiency was observed in a large subset of cases, although not mediated by large chromosomal deletions. PTEN loss resulted in hyperactivation of the AKT signaling pathway. PTEN rescue led to decreased proliferation, inhibition of colony formation, and increased apoptosis. Strikingly, PTEN loss decreased sensitivity to IGF1R inhibitors but increased responsiveness to temsirolimus, a potent mTOR inhibitor, as marked by induction of autophagy. These results suggest that PTEN is lost in a significant fraction of primary tumors, and this deficiency may have therapeutic consequences by concurrently attenuating responsiveness to IGF1R inhibition while increasing activity of mTOR inhibitors. The identification of PTEN status in the tumors of patients with recurrent disease could help guide the selection of therapies. IMPLICATIONS PTEN status in Ewing sarcoma affects cellular responses to IGFI and mTOR-directed therapy, thus justifying its consideration as a biomarker in future clinical trials.
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Affiliation(s)
- Mukund Patel
- Department of Genetics and Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Nicholas C Gomez
- Department of Genetics and Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina. Curriculum in Genetics and Molecular Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Andrew W McFadden
- Department of Genetics and Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Billie M Moats-Staats
- Department of Pediatrics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Sam Wu
- Department of Genetics and Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Andres Rojas
- Department of Genetics and Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Travis Sapp
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Jeremy M Simon
- Department of Genetics and Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Scott V Smith
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Kathleen Kaiser-Rogers
- Department of Pediatrics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina. Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Ian J Davis
- Department of Genetics and Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina. Department of Pediatrics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina. Carolina Center for Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
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Ocana A, Vera-Badillo F, Al-Mubarak M, Templeton AJ, Corrales-Sanchez V, Diez-Gonzalez L, Cuenca-Lopez MD, Seruga B, Pandiella A, Amir E. Activation of the PI3K/mTOR/AKT pathway and survival in solid tumors: systematic review and meta-analysis. PLoS One 2014; 9:e95219. [PMID: 24777052 PMCID: PMC4002433 DOI: 10.1371/journal.pone.0095219] [Citation(s) in RCA: 134] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Accepted: 03/24/2014] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Aberrations in the phosphatidylinositol 3-kinase (PI3K)/mammalian target of rapamycin (mTOR)/AKT pathway are common in solid tumors. Numerous drugs have been developed to target different components of this pathway. However the prognostic value of these aberrations is unclear. METHODS PubMed was searched for studies evaluating the association between activation of the PI3K/mTOR/AKT pathway (defined as PI3K mutation [PIK3CA], lack of phosphatase and tensin homolog [PTEN] expression by immunohistochemistry or western-blot or increased expression/activation of downstream components of the pathway by immunohistochemistry) with overall survival (OS) in solid tumors. Published data were extracted and computed into odds ratios (OR) for death at 5 years. Data were pooled using the Mantel-Haenszel random-effect model. RESULTS Analysis included 17 studies. Activation of the PI3K/mTOR/AKT pathway was associated with significantly worse 5-year survival (OR:2.12, 95% confidence intervals 1.42-3.16, p<0.001). Loss of PTEN expression and increased expression/activation of downstream components were associated with worse survival. No association between PIK3CA mutations and survival was observed. Differences between methods for assessing activation of the PI3K/mTOR/AKT pathway were statistically significant (p = 0.04). There was no difference in the effect of up-regulation of the pathway on survival between different cancer sites (p = 0.13). CONCLUSION Activation of the PI3K/AKT/mTOR pathway, especially if measured by loss of PTEN expression or increased expression/activation of downstream components is associated with poor survival. PIK3CA mutational status is not associated with adverse outcome, challenging its value as a biomarker of patient outcome or as a stratification factor for patients treated with agents acting on the PI3K/AKT/mTOR pathway.
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Affiliation(s)
- Alberto Ocana
- Translational Research Unit, Albacete University Hospital, Albacete, Spain
| | - Francisco Vera-Badillo
- Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre and University of Toronto, Toronto, Canada
| | - Mustafa Al-Mubarak
- Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre and University of Toronto, Toronto, Canada
| | - Arnoud J. Templeton
- Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre and University of Toronto, Toronto, Canada
| | | | | | | | - Bostjan Seruga
- Sector of medical Oncology, Institute of Oncology Ljubljana, Ljubljana, Slovenia
| | - Atanasio Pandiella
- Centro de Investigación del Cáncer, CSIC-University of Salamanca, Salamanca, Spain
| | - Eitan Amir
- Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre and University of Toronto, Toronto, Canada
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Liu YZ, Wu K, Huang J, Liu Y, Wang X, Meng ZJ, Yuan SX, Wang DX, Luo JY, Zuo GW, Yin LJ, Chen L, Deng ZL, Yang JQ, Sun WJ, He BC. The PTEN/PI3K/Akt and Wnt/β-catenin signaling pathways are involved in the inhibitory effect of resveratrol on human colon cancer cell proliferation. Int J Oncol 2014; 45:104-12. [PMID: 24756222 DOI: 10.3892/ijo.2014.2392] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Accepted: 03/11/2014] [Indexed: 12/28/2022] Open
Abstract
Colon cancer is one of the most common malignancies and the treatments for colon cancer have been developed substantially in the last decades, but there is still a great clinical need to explore new treatment regimens due to the undesirable prognosis. In this investigation, we demonstrated the anti-proliferative and apoptosis-inducing activities of resveratrol (Res) in human colon cancer cells, and the possible mechanisms underlying these effects. We used crystal violet staining, flow cytometry and western blotting to validate the anti-proliferative and apoptosis-inducing effects of Res on HCT116 cells. A xenograft tumor model was used to confirm the anti-proliferative effects of Res. We employed polymerase chain reaction, western blotting, recombinant adenovirus and luciferase reporter assay to explore the possible mechanism(s) of action. We found that Res inhibits significantly the proliferation and promotes apoptosis in HCT116 cells, as well as inhibits the xenograft tumor growth of colon cancer. Res upregulates the expression of phosphatase and tensin homolog (PTEN) and decreases the phosphorylation of Akt1/2. The exogenous expression of PTEN inhibits the PI3K/Akt signal and promotes the anti-proliferative effects of Res in HCT116 cells, while knockdown of PTEN increases PI3K/Akt signal but reduces the anti-proliferative function of Res. The protein and mRNA expression of β-catenin are all decreased by Res concentration-dependently. Thus, our findings strongly suggest that the anti-proliferative effects of Res in human colon cancer cells may be mediated by regulating separately the PTEN/PI3K/Akt and Wnt/β-catenin signaling.
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Affiliation(s)
- Ying-Zi Liu
- Chongqing Municipal Key Laboratory of Higher Education Institutions for Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, P.R. China
| | - Ke Wu
- Chongqing Municipal Key Laboratory of Higher Education Institutions for Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, P.R. China
| | - Jun Huang
- Chongqing Municipal Key Laboratory of Higher Education Institutions for Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, P.R. China
| | - Yang Liu
- Chongqing Municipal Key Laboratory of Higher Education Institutions for Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, P.R. China
| | - Xin Wang
- Chongqing Municipal Key Laboratory of Higher Education Institutions for Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, P.R. China
| | - Zi-Jun Meng
- Chongqing Municipal Key Laboratory of Higher Education Institutions for Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, P.R. China
| | - Shuang-Xue Yuan
- Chongqing Municipal Key Laboratory of Higher Education Institutions for Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, P.R. China
| | - Dong-Xu Wang
- Chongqing Municipal Key Laboratory of Higher Education Institutions for Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, P.R. China
| | - Jin-Yong Luo
- Key Laboratory for Diagnostic Medicine designated by the Chinese Ministry of Education, Chongqing Medical University, Chongqing, P.R. China
| | - Guo-Wei Zuo
- Key Laboratory for Diagnostic Medicine designated by the Chinese Ministry of Education, Chongqing Medical University, Chongqing, P.R. China
| | - Liang-Jun Yin
- Department of Orthopedic Surgery, Second Affiliated Hospital, Chongqing Medical University, Chongqing, P.R. China
| | - Liang Chen
- Department of Orthopedic Surgery, Second Affiliated Hospital, Chongqing Medical University, Chongqing, P.R. China
| | - Zhong-Liang Deng
- Department of Orthopedic Surgery, Second Affiliated Hospital, Chongqing Medical University, Chongqing, P.R. China
| | - Jun-Qin Yang
- Chongqing Municipal Key Laboratory of Higher Education Institutions for Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, P.R. China
| | - Wen-Juan Sun
- Chongqing Municipal Key Laboratory of Higher Education Institutions for Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, P.R. China
| | - Bai-Cheng He
- Chongqing Municipal Key Laboratory of Higher Education Institutions for Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, P.R. China
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Hypoxia triggers a Nur77-β-catenin feed-forward loop to promote the invasive growth of colon cancer cells. Br J Cancer 2014; 110:935-45. [PMID: 24423919 PMCID: PMC3929893 DOI: 10.1038/bjc.2013.816] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 11/20/2013] [Accepted: 12/10/2013] [Indexed: 01/10/2023] Open
Abstract
Background: β-Catenin is a potent oncogenic protein in colorectal cancer (CRC), but the targets and regulation of this important signalling molecule are not completely understood. Hypoxia is a prominent feature of solid tumours that contributes to cancer progression. Methods: Here, we analysed the regulation between Nur77 and β-catenin under hypoxic conditions. Cell proliferation, migration, and invasion assays were performed to assess functional consequences. Results: We showed that hypoxia stimulated co-upregulation of β-catenin and Nur77 in a number of human CRC cell lines. Interestingly, expression of β-catenin and Nur77 by hypoxia formed a mutual feedback regulation circuits that conferred aggressive growth of CRC. Overexpression of β-catenin increased Nur77 transcription through hypoxia-inducible factor-1α rather than T-cell factor. Nur77-mediated activation of β-catenin by hypoxia was independent of both DNA binding and transactivation. Further, we showed that hypoxic activation of β-catenin was independent of the classical adenomatous polyposis coli and p53 pathways, but stimulated by phosphatidylinositol 3-kinase/Akt in a Nur77-dependent manner. Under hypoxic conditions, enhanced β-catenin and Nur77 expression synergistically stimulated CRC cell migration, invasion, and epithelial–mesenchymal transition. Conclusion: These findings provide a novel molecular mechanism for hypoxic CRCs that may contribute to tumour progression, and its targeting may represent an effective therapeutic avenue.
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Xue Q, Sun K, Deng HJ, Lei ST, Dong JQ, Li GX. Anti-miRNA-221 sensitizes human colorectal carcinoma cells to radiation by upregulating PTEN. World J Gastroenterol 2013; 19:9307-9317. [PMID: 24409057 PMCID: PMC3882403 DOI: 10.3748/wjg.v19.i48.9307] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Revised: 09/29/2013] [Accepted: 10/14/2013] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the regulative effect of miRNA (miR)-221 on colorectal carcinoma (CRC) cell radiosensitivity and the underlying mechanisms.
METHODS: A human CRC-derived cell line was cultured conventionally and exposed to different doses of X-rays (0, 2, 4, 6 and 8 Gy). The total RNA and protein of the cells were extracted 24 h after irradiation, and the alteration of miR-221 and phosphatase and tensin homolog deleted on chromosome 10 (PTEN) gene mRNA expression was detected by real-time reverse transcriptase polymerase chain reaction (PCR). The protein alteration of PTEN in the cells was detected by Western blotting. Caco2 cells were pretreated with or without anti-PTEN-siRNA prior to the addition of pre-miR-221 or anti-miR-221 using Lipofectamine 2000. Colony formation assay and flow cytometry analysis were used to measure the surviving cell fraction and the sensitizing enhancement ratio after irradiation. Additionally, PTEN 3′-untranslated region fragment was PCR amplified and inserted into a luciferase reporter plasmid. The luciferase reporter plasmid construct was then transfected into CRC cells together with pre-miR-221 or anti-miR-221, and the luciferase activity in the transfected cells was detected.
RESULTS: The X-ray radiation dose had a significant effect on the expression of miR-221 and PTEN protein in human Caco2 cells in a dose-dependent manner. The miR-221 expression level improved gradually with the increase in irradiation dose, while the PTEN protein expression level reduced gradually. miR-221 expression was significantly reduced in the anti-miR-221 group compared with the pre-miR-221 and negative control groups (P < 0.01). Anti-miR-221 upregulated expression of PTEN protein and enhanced the radiosensitivity of Caco2 cells (P < 0.01). Moreover, the inhibitory effect was dramatically abolished by pretreatment with anti-PTEN-siRNA, suggesting that the enhancement of radiosensitivity was indeed mediated by PTEN. A significant increase of luciferase activity was detected in CRC cells that were cotransfected with the luciferase reporter plasmid construct and anti-miR-221 (P < 0.01).
CONCLUSION: Anti-miR-221 can enhance the radiosensitivity of CRC cells by upregulating PTEN.
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Shroff S, Overman MJ, Rashid A, Shroff RT, Wang H, Chatterjee D, Katz MH, Lee JE, Wolff RA, Abbruzzese JL, Fleming JB, Wang H. The expression of PTEN is associated with improved prognosis in patients with ampullary adenocarcinoma after pancreaticoduodenectomy. Arch Pathol Lab Med 2013; 137:1619-26. [PMID: 24168499 DOI: 10.5858/arpa.2012-0418-oa] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
CONTEXT Phosphatase and tensin homolog (PTEN) is one of the most frequently inactivated tumor suppressor genes in sporadic cancers. Somatic mutations of PTEN occur in many tumors including those of the gastrointestinal and hepatobiliary tracts. Loss of PTEN expression is associated with poor prognosis in patients with metastatic colonic adenocarcinoma, gastroesophageal junction adenocarcinoma, gastric adenocarcinoma, and pancreatic ductal adenocarcinoma. OBJECTIVE To study the expression of PTEN and its significance in ampullary adenocarcinoma (AA). DESIGN We constructed tissue microarrays by using archival tissue from 92 patients (55 males, 37 females; median age, 63 years; age range, 37 to 87 years) with previously untreated AA who underwent pancreaticoduodenectomy at our institution. PTEN expression was evaluated by immunohistochemistry, scored semiquantitatively (based on staining intensity and percentage positive tumor cells), and correlated with clinicopathologic features and survival. RESULTS Of 92 cases, 23 (25.0%) were PTEN negative. Loss of PTEN expression correlated with lymph node metastasis (P = .004), advanced American Joint Committee on Cancer (AJCC) stage (P = .02), and higher frequency of recurrence (P = .03). Patients with PTEN-negative tumors had shorter disease-free survival (DFS, mean: 89.0 ± 20.8 months) and overall survival (OS, mean: 93.1 ± 19.1 months) than those with PTEN-positive tumors (DFS, mean: 161.4 ± 11.7 months, P = .01; OS, mean: 175.4 ± 11.0 months, P = .001). In multivariate analyses, PTEN expression was a prognostic factor for both DFS and OS, independent of AJCC stage, lymph node status, pathologic tumor (pT) stage, and differentiation. CONCLUSIONS Loss of PTEN expression is associated with poor DFS and OS in patients with AA after curative surgery. PTEN expression may be used as a prognostic marker for patients with resected AA.
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Affiliation(s)
- Stuti Shroff
- From the Departments of Pathology (Drs S. Shroff, Rashid, and Huamin Wang), Gastrointestinal Medical Oncology (Drs Overman, R. T. Shroff, Hua Wang, Wolff, and Abbruzzese), and Surgical Oncology (Drs Chatterjee, Katz, Lee, and Fleming). The University of Texas M. D. Anderson Cancer Center, Houston
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JIAO FENG, JIN ZILIANG, WANG LEI, WANG LIWEI. Research and clinical applications of molecular biomarkers in gastrointestinal carcinoma (Review). Biomed Rep 2013; 1:819-827. [PMID: 24649035 PMCID: PMC3917016 DOI: 10.3892/br.2013.158] [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: 05/05/2013] [Accepted: 08/12/2013] [Indexed: 11/06/2022] Open
Abstract
Gastrointestinal (GI) carcinoma is a common malignant disease worldwide. Its development and progression is a multistage process involving a multifactorial etiology. Although the detailed mechanisms of the development of GI carcinoma remain controversial, the elucidation of its molecular biology over the last few years has resulted in a better perspective on its epidemiology, carcinogenesis and pathogenesis. More significantly, it is currently possible to use biological indicators or biomarkers in differential diagnosis, prognostic evaluation and specific clinical interventions. In this review, we aimed to describe the biomarkers of pathogenesis, invasion, metastasis and prognosis of GI carcinoma and discuss their potential clinical applications. The majority of these biomarkers, such as tumor-associated antigens, oncogenes and tumor suppressor genes, metastasis-associated genes, cell adhesion molecules, cytokines, growth factors and microRNAs, are currently broadly applicable.
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Affiliation(s)
- FENG JIAO
- Department of Oncology, The First People’s Hospital Affiliated to Shanghai Jiao Tong University, Shanghai 201620, P.R. China
| | - ZILIANG JIN
- Department of Oncology, The First People’s Hospital Affiliated to Shanghai Jiao Tong University, Shanghai 201620, P.R. China
| | - LEI WANG
- Department of Oncology, The First People’s Hospital Affiliated to Shanghai Jiao Tong University, Shanghai 201620, P.R. China
| | - LIWEI WANG
- Department of Oncology, The First People’s Hospital Affiliated to Shanghai Jiao Tong University, Shanghai 201620, P.R. China
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Wu W, Yang P, Feng X, Wang H, Qiu Y, Tian T, He Y, Yu C, Yang J, Ye S, Zhou Y. The relationship between and clinical significance of MicroRNA-32 and phosphatase and tensin homologue expression in colorectal cancer. Genes Chromosomes Cancer 2013; 52:1133-40. [PMID: 24123284 DOI: 10.1002/gcc.22108] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Accepted: 08/08/2013] [Indexed: 12/16/2022] Open
Abstract
MicroRNAs (miRNAs, miRs) are suspected to play important roles in carcinogenesis. MiR-32 has altered expression in colorectal cancer (CRC); however, the clinical significance of miR-32 expression in the process of carcinogenesis is poorly understood. In this study, we determined the levels of, the correlation between, and the clinical significance of the expression of miR-32 and phosphatase and tensin homologue (PTEN), a tumor suppressor targeted by miR-32, in CRC. The levels of miR-32 and PTEN gene expression in 35 colorectal carcinoma samples, 35 corresponding cancer-adjacent tissue samples, 27 colorectal adenoma samples, and 16 normal tissue samples were quantified using real-time quantitative reverse transcriptase-polymerase chain reaction. PTEN protein expression was determined using western blot and immunohistochemistry (IHC). The relationship between the miR-32 and PTEN protein expression and clinicopathological factors was analyzed. Significant upregulation of miR-32 expression and reduction of PTEN were identified in CRC tissues. High miR-32 levels were significantly associated with lymph node and distant metastasis, and Kaplan-Meier analysis indicated that patients with high miR-32 expression had a poor overall survival. Low PTEN protein expression was also significantly correlated with distant metastasis. An inverse relationship between miR-32 and PTEN protein expression was identified. In addition, IHC analysis revealed weak or indiscernible PTEN staining in tumor tissue. MiR-32 overexpression was correlated with specific CRC clinicopathological features and may be a marker of poor prognosis in CRC patients. MiR-32 and PTEN expression were inversely correlated, and miR-32 may be associated with the development of CRC.
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Affiliation(s)
- Weiyun Wu
- Department of Gastroenterology, The Affiliated Hospital of Guangdong Medical College, South Peoples Avenue No. 57, Xiashan District, Zhanjiang, Guangdong, China
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Day FL, Jorissen RN, Lipton L, Mouradov D, Sakthianandeswaren A, Christie M, Li S, Tsui C, Tie J, Desai J, Xu ZZ, Molloy P, Whitehall V, Leggett BA, Jones IT, McLaughlin S, Ward RL, Hawkins NJ, Ruszkiewicz AR, Moore J, Busam D, Zhao Q, Strausberg RL, Gibbs P, Sieber OM. PIK3CA and PTEN gene and exon mutation-specific clinicopathologic and molecular associations in colorectal cancer. Clin Cancer Res 2013; 19:3285-96. [PMID: 23633456 DOI: 10.1158/1078-0432.ccr-12-3614] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE PIK3CA and PTEN mutations are prevalent in colorectal cancer and potential markers of response to mitogen-activated protein/extracellular signal-regulated kinase inhibitors and anti-EGF receptor antibody therapy. Relationships between phosphoinositide 3-kinase (PI3K) pathway mutation, clinicopathologic characteristics, molecular features, and prognosis remain controversial. EXPERIMENTAL DESIGN A total of 1,093 stage I-IV colorectal cancers were screened for PIK3CA (exons 9 and 20), KRAS (codons 12-13), BRAF (codon 600) mutations, and microsatellite instability (MSI). PTEN (exons 3-8) and CpG island methylator phenotype (CIMP) status were determined in 744 and 489 cases. PIK3CA data were integrated with 17 previous reports (n = 5,594). RESULTS PIK3CA and PTEN mutations were identified in 11.9% and 5.8% of colorectal cancers. PTEN mutation was associated with proximal tumors, mucinous histology, MSI-high (MSI-H), CIMP-high (CIMP-H), and BRAF mutation (P < 0.02). PIK3CA mutation was related to older age, proximal tumors, mucinous histology, and KRAS mutation (P < 0.04). In integrated cohort analysis, PIK3CA exon 9 and 20 mutations were overrepresented in proximal, CIMP-low (CIMP-L), and KRAS-mutated cancers (P ≤ 0.011). Comparing PIK3CA exonic mutants, exon 20 mutation was associated with MSI-H, CIMP-H, and BRAF mutation, and exon 9 mutation was associated with KRAS mutation (P ≤ 0.027). Disease-free survival for stage II/III colorectal cancers did not differ by PI3K pathway status. CONCLUSION PI3K pathway mutation is prominent in proximal colon cancers, with PIK3CA exon 20 and PTEN mutations associated with features of the sessile-serrated pathway (MSI-H/CIMP-H/BRAF(mut)), and PIK3CA exon 9 (and to a lesser extent exon 20) mutation associated with features of the traditional serrated pathway (CIMP-L/KRAS(mut)) of tumorigenesis. Our data highlight the PI3K pathway as a therapeutic target in distinct colorectal cancer subtypes.
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Affiliation(s)
- Fiona L Day
- Ludwig Colon Cancer Initiative Laboratory, Ludwig Institute for Cancer Research, University of Melbourne, Australia
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Wu W, Yang J, Feng X, Wang H, Ye S, Yang P, Tan W, Wei G, Zhou Y. MicroRNA-32 (miR-32) regulates phosphatase and tensin homologue (PTEN) expression and promotes growth, migration, and invasion in colorectal carcinoma cells. Mol Cancer 2013; 12:30. [PMID: 23617834 PMCID: PMC3653742 DOI: 10.1186/1476-4598-12-30] [Citation(s) in RCA: 139] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2012] [Accepted: 04/17/2013] [Indexed: 12/17/2022] Open
Abstract
Background Colorectal carcinoma (CRC) is one of the leading causes of cancer-related mortality worldwide. MicroRNAs (miRNAs, miRs) play important roles in carcinogenesis. MiR-32 has been shown to be upregulated in CRC. In this study, we identified the potential effects of miR-32 on some important biological properties of CRC cells, and clarified the regulation of PTEN by miR-32. Methods The effect of miR-32 on PTEN expression was assessed in CRC cell lines with miR-32 mimics/inhibitor to increase/decrease miR-32 expression. Furthermore, the roles of miR-32 in regulating CRC cells biological properties were analyzed with miR-32 mimics/inhibitor-transfected cells. The 3′-untranslated region (3′-UTR) of PTEN combined with miR-32 was verified by dual-luciferase reporter assay. Results Gain-of-function and loss-of-function studies showed that overexpression of miR-32 promoted SW480 cell proliferation, migration, and invasion, reduced apoptosis, and resulted in downregulation of PTEN at a posttranscriptional level. However, miR-32 knock-down inhibited these processes in HCT-116 cells and enhanced the expression of PTEN protein. In addition, we further identified PTEN as the functional downstream target of miR-32 by directly targeting the 3′-UTR of PTEN. Conclusions Our results demonstrated that miR-32 was involved in tumorigenesis of CRC at least in part by suppression of PTEN.
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Affiliation(s)
- Weiyun Wu
- Department of Gastroenterology, The affiliated Hospital of Guangdong Medical College, Zhanjiang, Guangdong, China
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Chowdhury S, Ongchin M, Wan G, Sharratt E, Brattain MG, Rajput A. Restoration of PTEN activity decreases metastases in an orthotopic model of colon cancer. J Surg Res 2013; 184:755-60. [PMID: 23623571 DOI: 10.1016/j.jss.2013.03.035] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Revised: 03/08/2013] [Accepted: 03/12/2013] [Indexed: 01/20/2023]
Abstract
BACKGROUND Mutational loss of tumor suppressor phosphatase and tensin homologue deleted on chromosome ten (PTEN) is associated with malignant progression in many cancers, including colorectal cancer (CRC). PTEN is involved in negatively regulating the phosphatidylinositol 3-kinase/AKT oncogenic signaling pathway and has been implicated in the metastatic colonization process. Few in vivo models are available to study CRC metastasis. The purpose of this study was to determine the effect of restoring PTEN activity on metastases in an orthotopic murine model. METHODS Green fluorescent protein labeled TENN, a highly metastatic human colon cancer cell line with mutational loss of PTEN gene and TENN clones (with restoration of PTEN gene) tumors were orthotopically implanted onto the colons of BALB/c nude mice and allowed to develop primary and metastatic tumors. Seven weeks post-implantation, mice were euthanized and organs extracted for examination. RESULTS Both TENN and TENN clone cell lines demonstrated 100% primary invasion. However, compared with the parental TENN cells, which demonstrated 62% metastases to both lungs and liver, TENN clone cells showed an approximately 50% reduction in metastasis, with only 31.6% liver metastasis and no metastasis to the lungs (P = 0.02). CONCLUSIONS Our study shows that reactivation of PTEN tumor suppressor pathway leads to a 50% reduction in CRC metastasis without affecting primary tumor formation. Importantly, PTEN restoration also changed the organotropic homing from liver and lung metastasis to liver metastasis only. This in vivo study demonstrates that PTEN might act specifically as a metastasis suppressor and, thus, efforts to target the phosphatidylinositol 3-kinase/PTEN pathway are legitimate.
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Affiliation(s)
- Sanjib Chowdhury
- Eppley Cancer Institute, University of Nebraska Medical Center, Omaha, Nebraska
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Price TJ, Hardingham JE, Lee CK, Townsend AR, Wrin JW, Wilson K, Weickhardt A, Simes RJ, Murone C, Tebbutt NC. Prognostic impact and the relevance of PTEN copy number alterations in patients with advanced colorectal cancer (CRC) receiving bevacizumab. Cancer Med 2013; 2:277-85. [PMID: 23930204 PMCID: PMC3699839 DOI: 10.1002/cam4.75] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Revised: 02/22/2013] [Accepted: 03/01/2013] [Indexed: 12/12/2022] Open
Abstract
Loss of phosphatase and tensin homologue (PTEN) expression may be prognostic in colorectal cancer (CRC) and may have a correlation with vascular endothelial growth factor (VEGF) expression via hypoxia-inducible factor 1 (HIF-1) alpha, and the PI3K/mTOR pathways. We therefore have explored the prognostic association of PTEN loss and the potential that PTEN loss may be predictive of outcome with bevacizumab. Patients enrolled in the AGITG MAX trial, a randomized Phase III trial of capecitabine (C) +/− bevacizumab (B) (+/− mitomycin C [M]) with available tissues were analyzed for PTEN expression (loss vs. no loss) as assessed using a Taqman® copy number assay (CNA). Of the original 471 patients enrolled, tissues from 302 (64.1%) patients were analyzed. PTEN loss was observed in 38.7% of patients. There was no relationship between PTEN loss and KRAS or BRAF mutation. PTEN status was not prognostic for progression-free survival (PFS) or overall survival (OS) in multivariate analyses adjusting for other baseline factors; loss versus no loss PFS hazard ratio (HR) 0.9 (0.7–1.16), OS HR 1.04 (0.79–1.38). PTEN was not prognostic when assessed by KRAS and BRAF status. By using the comparison of C versus CB+CBM, PTEN status was not significantly predictive of the effectiveness of B for PFS or OS. PTEN status was not prognostic for survival in advanced colorectal cancer, irrespective of KRAS or BRAF status. PTEN status did not significantly predict different benefit with bevacizumb therapy.
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Affiliation(s)
- Timothy J Price
- Haematology-Oncology Department, The Queen Elizabeth Hospital Woodville, SA, 5011, Australia.
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Bohn BA, Mina S, Krohn A, Simon R, Kluth M, Harasimowicz S, Quaas A, Bockhorn M, Izbicki JR, Sauter G, Marx A, Stahl PR. Altered PTEN function caused by deletion or gene disruption is associated with poor prognosis in rectal but not in colon cancer. Hum Pathol 2013; 44:1524-33. [PMID: 23465274 DOI: 10.1016/j.humpath.2012.12.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2012] [Revised: 12/12/2012] [Accepted: 12/14/2012] [Indexed: 12/14/2022]
Abstract
Colorectal cancer is the third most common malignancy worldwide. Anti-epidermal growth factor receptor (EGFR)-targeted therapy shows clinical evidence in this malignancy and improves outcome. The tumor suppressor gene phosphatase and tensin homologue (PTEN) is considered a potential predictor of nonresponse to anti-EGFR agents. The purpose of this study was to assess whether associations between PTEN alterations (PTEN gene deletion or PTEN gene disruption) and clinical outcome could be caused by a prognostic (and not predictive) effect of PTEN inactivation. Therefore, we analyzed 404 colorectal cancers not previously treated with anti-EGFR drugs in a tissue microarray format. PTEN deletion and PTEN gene rearrangements were analyzed by fluorescence in situ hybridization. Heterogeneity analysis of all available large tissue sections was performed in 6 cases with genomic PTEN alteration. Twenty-seven (8.8%) of 307 analyzable colorectal cancer spots showed genomic PTEN alterations including 24 hemizygous and 1 homozygous deletion as well as 2 PTEN gene disruptions. Genomic PTEN alterations were associated with reduced patient survival in rectal cancer in univariate and multivariate analyses (P = .012; hazard ratio, 2.675; 95% confidence interval, 1.242-5.759) but not in colon cancer. Large-section evaluation revealed a homogeneous distribution pattern in all 4 analyzed cases with PTEN deletion and in both cases with a PTEN gene disruption. In conclusion, genomic PTEN gene alterations caused by deletion or gene disruption characterize a fraction of rectal cancers with particularly poor outcome.
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Affiliation(s)
- B A Bohn
- General, Visceral and Thoracic Surgery Department and Clinic, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
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Voutsina A, Tzardi M, Kalikaki A, Zafeiriou Z, Papadimitraki E, Papadakis M, Mavroudis D, Georgoulias V. Combined analysis of KRAS and PIK3CA mutations, MET and PTEN expression in primary tumors and corresponding metastases in colorectal cancer. Mod Pathol 2013; 26:302-13. [PMID: 22936063 DOI: 10.1038/modpathol.2012.150] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Metastasis is the main cause of mortality in patients with colorectal cancer. However, most of the targeted therapies and predictive molecular biomarkers were developed based mainly on primary tumors. The current study was conducted to determine the degree of discordance between potential predictive and/or prognostic molecular markers in primary colorectal tumors and corresponding metastases, as this could have an impact on the efficacy of targeted therapies in the advanced colorectal cancer. KRAS, PIK3CA and BRAF mutations were determined by Sanger sequencing and mutant-enriched polymerase chain reaction (PCR) assays in 83 paired samples, MET gene copy number by quantitative PCR in 59, MET expression by immunohistochemistry in 73 and nuclear and cytoplasmic expression of PTEN by immunohistochemistry in 78 and 71 pairs, respectively. A certain degree of discordance between primary tumors and corresponding metastases was demonstrated for all examined biomarkers except BRAF mutations. PIK3CA exon 9 mutations in primary tumors and loss of PTEN nuclear expression in metastases correlated with KRAS mutations. KRAS wild-type status in primary tumors was associated with loss of PTEN cytoplasmic expression and high gene copy number of MET. Survival and clinical data were available for 68 patients. The multiple regression analysis revealed that the right-sided tumor localization and overexpression of MET were associated with shorter overall survival.
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Affiliation(s)
- Alexandra Voutsina
- Laboratory of Tumor Cell Biology, School of Medicine, University of Crete, Heraklion, Greece.
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