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Zhou G, Wang S. YTHDC2 Retards Cell Proliferation and Triggers Apoptosis in Papillary Thyroid Cancer by Regulating CYLD-Mediated Inactivation of Akt Signaling. Appl Biochem Biotechnol 2024; 196:588-603. [PMID: 37162682 DOI: 10.1007/s12010-023-04540-8] [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] [Accepted: 04/11/2023] [Indexed: 05/11/2023]
Abstract
N6-Methyladenosine (m6A) mRNA methylation modification is regarded as an important mechanism involved in diverse physiological processes. YT521-B homology (YTH) domain family members are associated with the tumorigenesis of several cancers. However, the role of YTHDC2 in papillary thyroid cancer (PTC) progression remains unknown. Results showed that YTHDC1, YTHDF1, YTHDF2, and YTHDF3 showed no observable difference in thyroid cancer samples. YTHDC2 was significantly downregulated in thyroid cancer samples and cells. YTHDC2 inhibited cell proliferation in PTC cells. YTHDC2 elicited apoptosis in PTC cells, as demonstrated by the elevated expression of pro-apoptotic factors cl-caspase-3/caspase-3 and Bcl-2-associated (Bax), and the reduced anti-apoptotic B cell lymphoma-2 (Bcl-2) expression. There was a positive correlation between YTHDC2 and cylindromatosis (CYLD) expression based on GEPIA database. YTHDC2 increased CYLD expression in PTC cells. CYLD knockdown abolished the effects of YTHDC2 on PTC cell proliferation and apoptosis. Additionally, YTHDC2 inactivated the protein kinase B (Akt) pathway by increasing CYLD in PTC cells. Overall, YTHDC2 inhibited cell proliferation and induced apoptosis in PTC cells by regulating CYLD-mediated inactivation of Akt pathway.
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Affiliation(s)
- Guangying Zhou
- Department of Thyroid and Breast Surgery, Shandong Provincial Third Hospital, Shandong University, Jinan, 250031, China
| | - Shasha Wang
- Department of Radiotherapy, the 960Th Hospital of Chinese PLA, No. 25 Shifan Road, Jinan, 250031, China.
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2
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Clinical Implications of mTOR Expression in Papillary Thyroid Cancer—A Systematic Review. Cancers (Basel) 2023; 15:cancers15061665. [PMID: 36980552 PMCID: PMC10046096 DOI: 10.3390/cancers15061665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/01/2023] [Accepted: 03/06/2023] [Indexed: 03/11/2023] Open
Abstract
Papillary thyroid cancer (PTC) comprises approximately 80% of all thyroid malignancies. Although several etiological factors, such as age, gender, and irradiation, are already known to be involved in the development of PTC, the genetics of cancerogenesis remain undetermined. The mTOR pathway regulates several cellular processes that are critical for tumorigenesis. Activated mTOR is involved in the development and progression of PTC. Therefore, we performed a systematic review of papers studying the expression of the mTOR gene and protein and its relationship with PTC risk and clinical outcome. A systematic literature search was performed using PubMed, Embase, and Scopus databases (the search date was 2012–2022). Studies investigating the expression of mTOR in the peripheral blood or tissue of patients with PTC were deemed eligible for inclusion. Seven of the 286 screened studies met the inclusion criteria for mTOR gene expression and four for mTOR protein expression. We also analyzed the data on mTOR protein expression in PTC. We analyzed the association of mTOR expression with papillary thyroid cancer clinicopathological features, such as the TNM stage, BRAF V600E mutation, sex distribution, lymph node and distant metastases, and survival prognosis. Understanding specific factors involved in PTC tumorigenesis provides opportunities for targeted therapies. We also reviewed the possible new targeted therapies and the use of mTOR inhibitors in PTC. This topic requires further research with novel techniques to translate the achieved results to clinical application.
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Salimi-Jeda A, Ghabeshi S, Gol Mohammad Pour Z, Jazaeri EO, Araiinejad M, Sheikholeslami F, Abdoli M, Edalat M, Abdoli A. Autophagy Modulation and Cancer Combination Therapy: A Smart Approach in Cancer Therapy. Cancer Treat Res Commun 2022; 30:100512. [PMID: 35026533 DOI: 10.1016/j.ctarc.2022.100512] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Revised: 12/03/2021] [Accepted: 01/04/2022] [Indexed: 12/15/2022]
Abstract
The autophagy pathway is the process whereby cells keep cellular homeostasis and respond to stress via recycling their damaged cellular proteins, organelles, and other cellular components. In the context of cancer, autophagy is a dual-edge sword pro- and anti-tumorigenic role depending on the oncogenic context and stage of tumorigenesis. Cancer cells have a higher dependency on autophagy compared with normal cells because of cellular damages and high demands for energy. The carbon, nitrogen, and molecular oxygen are building blocks for highly proliferative cancer cells which extremely depend on glutaminolysis and aerobic glycolysis; when a cancer cell is restricted to glucose and glutamine, it initiates to activate a stress response pathway using autophagy. Oncogenic tyrosine kinases (OncTKs) and receptor tyrosine kinases (RTKs) activation result in autophagy modulation through activation of the PI3K/AKT/mTORC1 and RAS/MAPK signaling pathways. Targeted inhibition of tyrosine kinases (TKs) and RTKs have recently been considered as cancer therapy but drug resistance and cancer relapse continue to be a major limitation of tyrosine kinase inhibitors (TKIs). Manipulation of autophagy pathway along with TKIs may be a promising strategy to circumvent unknown existing drug-resistance mechanisms that may emerge in a treated patient. In this way, clinical trials are ongoing to modulate autophagy to treat cancer. This review aims to summarize the combination therapy of autophagy affecting compounds with anticancer drugs which target cell signaling pathways, metabolism mechanisms, and epigenetics modification to improve therapeutic efficacy against cancers.
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Affiliation(s)
- Ali Salimi-Jeda
- Department of Virology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - Soad Ghabeshi
- Department of Virology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Ehsan Ollah Jazaeri
- Department of Hepatitis and AIDS, Pasteur Institute of Iran, Tehran, 13169-43551, Iran
| | - Mehrdad Araiinejad
- WHO Collaborating Center for Reference and Research on Rabies, Pasteur Institute of Iran Iran
| | - Farzaneh Sheikholeslami
- WHO Collaborating Center for Reference and Research on Rabies, Pasteur Institute of Iran Iran
| | - Mohsen Abdoli
- Antimicrobial Resistance Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mahdi Edalat
- Department of medical laboratory sciences, Paramedical Sciences, Tabriz University of medical sciences, Tabriz, Iran
| | - Asghar Abdoli
- Department of Hepatitis and AIDS, Pasteur Institute of Iran, Tehran, 13169-43551, Iran.
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He L, Guo S, Zhu T, Chen C, Xu K. Down-Regulation of the Mammalian Target of Rapamycin (mTOR) Pathway Mediates the Effects of the Paeonol-Platinum(II) Complex in Human Thyroid Carcinoma Cells and Mouse SW1736 Tumor Xenografts. Med Sci Monit 2020; 26:e922561. [PMID: 32594094 PMCID: PMC7341900 DOI: 10.12659/msm.922561] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Background This study aimed to investigate the effects of the paeonol-platinum(II) (PL-Pt[II]) complex on SW1736 human anaplastic thyroid carcinoma cell line and the BHP7-13 human thyroid papillary carcinoma cell line in vitro and on mouse SW1736 tumor xenografts in vivo. Material/Methods The cytotoxic effects of the PL-Pt(II) complex on SW1736 cells and BHP7-13 cells was measured using the MTT assay. Western blot measured the expression levels of cyclins, cell apoptotic proteins, and signaling proteins. DNA content and apoptosis were detected by flow cytometry. SW1736 cell thyroid tumor xenografts were established in mice followed by treatment with the PL-Pt(II) complex. Results Treatment of the SW1736 and BHP7-13 cells with the PL-Pt(II) complex reduced cell proliferation in a dose-dependent manner, with an IC50 of 1.25 μM and 1.0 μM, respectively, and increased the cell fraction in G0/G1phase, inhibited p53, cyclin D1, promoted p27 and p21 expression, and significantly increased the sub-G1 fraction. Treatment with the PL-Pt(II) complex increased caspase-3 degradation, reduced the expression of p-4EBP1, p-4E-BP1 and p-S6, and reduced the expression of p-ERK1/2 and p-AKT. Treatment with the PL-Pt(II) complex reduced the volume of the SW1736 mouse tumor xenografts on day 14 and day 21, and reduced AKT phosphorylation and S6 protein expression and increased degradation of caspase-3. Conclusions The cytotoxic effects of the PL-Pt(II) complex in human thyroid carcinoma cells, including activation of apoptosis and an increased sub-G1 cell fraction of the cell cycle, were mediated by down-regulation of the mTOR pathway.
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Affiliation(s)
- Ling He
- Department of General Surgery, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China (mainland)
| | - Song Guo
- Department of General Surgery, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China (mainland)
| | - Taiyang Zhu
- Department of General Surgery, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China (mainland)
| | - Chen Chen
- Department of General Surgery, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China (mainland)
| | - Kun Xu
- Department of General Surgery, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China (mainland)
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5
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Lin B, Lu B, Hsieh IY, Liang Z, Sun Z, Yi Y, Lv W, Zhao W, Li J. Synergy of GSK-J4 With Doxorubicin in KRAS-Mutant Anaplastic Thyroid Cancer. Front Pharmacol 2020; 11:632. [PMID: 32477122 PMCID: PMC7239034 DOI: 10.3389/fphar.2020.00632] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 04/21/2020] [Indexed: 12/14/2022] Open
Abstract
Background Anaplastic thyroid cancer is the most aggressive thyroid cancer and has a poor prognosis. At present, there is no effective treatment for it. Methods Here, we used different concentrations of GSK-J4 or a combination of GSK-J4 and doxorubicin to treat human Cal-62, 8505C, and 8305C anaplastic thyroid cancer (ATC) cell lines. The in vitro experiments were performed using cell viability assays, cell cycle assays, annexin-V/PI binding assays, Transwell migration assays, and wound-healing assays. Tumor xenograft models were used to observe effects in vivo. Results The half maximal inhibitory concentration (IC50) of GSK-J4 in Cal-62 cells was 1.502 μM, and as the dose of GSK-J4 increased, more ATC cells were blocked in the G2-M and S stage. The combination of GSK-J4 and doxorubicin significantly increased the inhibitory effect on proliferation, especially in KRAS-mutant ATC cells in vivo (inhibition rate 38.0%) and in vitro (suppresses rate Fa value 0.624, CI value 0.673). The invasion and migration abilities of the KRAS-mutant cell line were inhibited at a low concentration (p < 0.05). Conclusions The combination of GSK-J4 with doxorubicin in KRAS-mutant ATC achieved tumor-suppressive effects at a low dose. The synergy of the combination of GSK-J4 and doxorubicin may make it an effective chemotherapy regimen for KRAS-mutant ATC.
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Affiliation(s)
- Bo Lin
- Department of Breast and Thyroid Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Bing Lu
- Institute of Urology of Shenzhen University, The Third Affiliated Hospital of Shenzhen University, Shenzhen Luohu Hospital Group, Shenzhen, China
| | - I-Yun Hsieh
- Department of Breast and Thyroid Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Zhen Liang
- Department of Breast Surgery, Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Zicheng Sun
- Department of Breast and Thyroid Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yang Yi
- Key Laboratory of Stem Cells and Tissue Engineering (Sun Yat-sen University), Ministry of Education, Guangzhou, China
| | - Weiming Lv
- Department of Breast and Thyroid Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Wei Zhao
- Key Laboratory of Stem Cells and Tissue Engineering (Sun Yat-sen University), Ministry of Education, Guangzhou, China.,RNA Biomedical Institute, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.,Department of Research and Development, Shenzhen Institute for Innovation and Translational Medicine, Shenzhen, China
| | - Jie Li
- Department of Breast and Thyroid Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
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Lu K, Wei W, Hu J, Wen D, Ma B, Liu W, Wang Y, Lu Z. Apoptosis Activation in Thyroid Cancer Cells by Jatrorrhizine-Platinum(II) Complex via Downregulation of PI3K/AKT/Mammalian Target of Rapamycin (mTOR) Pathway. Med Sci Monit 2020; 26:e922518. [PMID: 32341329 PMCID: PMC7201896 DOI: 10.12659/msm.922518] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Background Thyroid cancer, which is the most common endocrine cancer, has shown a drastic increase in incidence globally over the past decade. The present study investigated the thyroid cancer-inhibitory potential of jatrorrhizine-platinum(II) complex (JR-P(II) in vitro and in vivo. Material/Methods The JR-P(II)-mediated cytotoxicity in thyroid carcinoma cells was determined by using MTT assay. Assessment of acetylated histones, tubulin, and DNA repair proteins was made by Western blot assays. Flow cytometry was used for apoptosis and ROS accumulation measurement. Results The JR-P(II) suppressed proliferative capacity of SW1736, BHP7-13, and 8305C cells. JR-P(II) treatment markedly promoted expression of acetylated histone H3, H4, and tubulin in a dose-dependent manner. Treatment with JR-P(II) significantly elevated the proportion of cells in sub-G1 and promoted cleaved caspase-3 and -9. In JR-P(II)-treated cells, DCFH-DA fluorescence was much higher relative to control cells. The JR-P(II) treatment consistently suppressed expression of pS6, p-ERK1/2, p-4E-BP1, and p-AKT, and increased p-H2AX expression and suppressed KU70 and KU80 protein levels. The level of RAD51 was repressed in JR-P(II)-treated cells. JR-P(II) administration in mice caused no significant change in body weight, and it inhibited SW1736 tumor growth in mice. Conclusions The JR-P(II) induced cytotoxicity in thyroid cancer cells by inhibiting the mechanism responsible for repair of double-stranded DNA. The in vivo data also revealed that JR-P(II) effectively inhibits thyroid tumor growth by inducing DNA damage. Thus, our results suggest that further evaluation of JR-P(II) as a therapeutic candidate for thyroid cancer is warranted.
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Affiliation(s)
- KeBin Lu
- Department of General Surgery, Yuyao People's Hospital of Zhejiang Province, Yuyao, Zhejiang, CA, China (mainland)
| | - Wenjun Wei
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China (mainland).,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China (mainland)
| | - Jiaqian Hu
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China (mainland).,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China (mainland)
| | - Duo Wen
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China (mainland).,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China (mainland)
| | - Ben Ma
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China (mainland).,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China (mainland)
| | - Wanlin Liu
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China (mainland).,Department of Oncology, Medical College, Fudan University, Shanghai, China (mainland)
| | - Yu Wang
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China (mainland).,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China (mainland)
| | - Zhongwu Lu
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China (mainland).,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China (mainland)
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Li J, Jiang L, Liu Z, Li Y, Xu Y, Liu H. Oncogenic pseudogene DUXAP10 knockdown suppresses proliferation and invasion and induces apoptosis of papillary thyroid carcinoma cells by inhibition of Akt/mTOR pathway. Clin Exp Pharmacol Physiol 2020; 47:1473-1483. [PMID: 32215944 DOI: 10.1111/1440-1681.13310] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 03/15/2020] [Accepted: 03/19/2020] [Indexed: 12/13/2022]
Abstract
Pseudogenes, another novel group of non-coding segments without protein-coding capacity, are closely associated with tumourigenesis and cancer progression. Double homeoboxA pseudogene 10 (DUXAP10) is reported to be robustly expressed in thyroid carcinoma. However, the functional role and underlying mechanism of DUXAP10 in papillary thyroid carcinoma (PTC) progression remain undefined. DUXAP10 expression in PTC cells was detected by qRT-PCR. Cell proliferation and invasion were determined using 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide (MTT) and Transwell invasion assay, respectively. Apoptosis was evaluated using flow cytometry. Protein expression of matrix metalloproteinase (MMP)-2, MMP-9, protein kinase B (Akt), phosphorylated Akt, mammalian target of rapamycin (mTOR), and phosphorylated mTOR was examined by western blot. Results showed that DUXAP10 was significantly overexpressed in PTC cells compared with normal thyroid follicular epithelium cells. DUXAP10 silencing suppressed cell proliferation and invasive ability, reduced the expression of MMP-2 and MMP-9, and increased apoptotic rate and caspase-3 activity in PTC cells. Additionally, the Akt/mTOR pathway was inhibited following DUXAP10 knockdown in PTC cells. Activation of the Akt/mTOR pathway by 740Y-P and MHY1485 attenuated DUXAP10 knockdown-induced proliferation reduction, invasion suppression and apoptosis in PTC cells. In conclusion, DUXAP10 knockdown suppressed proliferation and invasion and induced apoptosis in PTC cells at least partially by inhibition of the Akt/mTOR pathway.
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Affiliation(s)
- Jian Li
- Department of Head and Neck Surgery, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, China
| | - Li Jiang
- Department of Head and Neck Surgery, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, China
| | - Zhu Liu
- Department of Head and Neck Surgery, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, China
| | - Yanguo Li
- Department of Head and Neck Surgery, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, China
| | - Yang Xu
- Department of Head and Neck Surgery, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, China
| | - Hongwei Liu
- Department of Head and Neck Surgery, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, China
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Ruan B, Liu W, Chen P, Cui R, Li Y, Ji M, Hou P, Yang Q. NVP-BEZ235 inhibits thyroid cancer growth by p53- dependent/independent p21 upregulation. Int J Biol Sci 2020; 16:682-693. [PMID: 32025215 PMCID: PMC6990918 DOI: 10.7150/ijbs.37592] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 11/30/2019] [Indexed: 01/25/2023] Open
Abstract
NVP-BEZ235 is a novel dual PI3K/mTOR inhibitor, currently in phase 1/2 clinical trials, exhibiting clinical efficiency in treatment of numerous malignancies including thyroid cancer. Cancer cells harboring mutant p53 was widely reported to be blunt to pharmaceutical therapies. However, whether this genotype dependent effect also presents in thyroid cancer when treated with NVP-BEZ235 remains unknown. Therefore, in this study, the tumor suppressing effects of NVP-BEZ235 in thyroid cancer cell lines and in-vivo xenograft mouse model harboring different p53 status were examined. The antitumor effects were confirmed in p53 mutant thyroid cancer cells, though less prominent than p53 wild type cells. And for the p53 mutant cells, p53-independent upregulation of p21 plays a critical role in their response to NVP-BEZ235. Moreover, GSK3β/β-catenin signaling inhibition was implicated in the p21-mediated G0/G1 cell cycle arrest in both p53 wild type and mutant thyroid cancer cells treated with NVP-BEZ235.
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Affiliation(s)
- Banjun Ruan
- Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China
| | - Wei Liu
- Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China
| | - Pu Chen
- Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China
| | - Rongrong Cui
- Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China
| | - Yu Li
- Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China
| | - Meiju Ji
- Center for Translational Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China
| | - Peng Hou
- Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China.,Key Laboratory for Tumor Precision Medicine of Shaanxi Province, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China
| | - Qi Yang
- Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China.,Key Laboratory for Tumor Precision Medicine of Shaanxi Province, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China
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The PI3K pathway impacts stem gene expression in a set of glioblastoma cell lines. J Cancer Res Clin Oncol 2020; 146:593-604. [PMID: 32030510 DOI: 10.1007/s00432-020-03133-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 01/16/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND The PI3K pathway controls diverse cellular processes including growth, survival, metabolism, and apoptosis. Nuclear FOXO factors were observed in cancers that harbor constitutively active PI3K pathway output and stem signatures. FOXO1 and FOXO3 were previously published to induce stem genes such as OCT4 in embryonic stem cells. Here, we investigated FOXO-driven stem gene expression in U87MG glioblastoma cells. METHODS PI3K-activated cancer cell lines were investigated for changes in gene expression, signal transduction, and clonogenicity under conditions with FOXO3 disruption or exogenous expression. The impact of PI3K pathway inhibition on stem gene expression was examined in a set of glioblastoma cell lines. RESULTS We found that CRISPR-Cas9-mediated FOXO3 disruption in U87MG cells caused decreased OCT4 and SOX2 gene expression, STAT3 phosphorylation on tyrosine 705 and clonogenicity. FOXO3 over expression led to increased OCT4 in numerous glioblastoma cancer cell lines. Strikingly, treatment of glioblastoma cells with NVP-BEZ235 (a dual inhibitor of PI3K and mTOR), which activates FOXO factors, led to robust increases OCT4 gene expression. Direct FOXO factor recruitment to the OCT4 promoter was detected by chromatin immunoprecipitation analyses using U87MG extracts. DISCUSSION We show for the first time that FOXO transcription factors promote stem gene expression glioblastoma cells. Treatment with PI3K inhibitor NVP-BEZ235 led to dramatic increases in stem genes in a set of glioblastoma cell lines. CONCLUSION Given that, PI3K inhibitors are actively investigated as targeted cancer therapies, the FOXO-mediated induction of stem genes observed in this study highlights a potential hazard to PI3K inhibition. Understanding the molecular underpinnings of stem signatures in cancer will allow refinements to therapeutic strategies. Targeting FOXO factors to reduce stem cell characteristics in concert with PI3K inhibition may prove therapeutically efficacious.
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10
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Li Z, Zhang Y, Wang R, Zou K, Zou L. Genetic alterations in anaplastic thyroid carcinoma and targeted therapies. Exp Ther Med 2019; 18:2369-2377. [PMID: 31555347 DOI: 10.3892/etm.2019.7869] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 06/21/2019] [Indexed: 02/06/2023] Open
Abstract
Thyroid cancer is the most common type of endocrine malignancy, and its incidence is increasing. Anaplastic thyroid cancer (ATC), referring to undifferentiated subtypes, is considered to be aggressive and associated with poor prognosis. Conventional therapies, including surgery, chemotherapy and radioiodine therapy, have been used for ATC, but these do not provide any significant reduction of the overall mortality rate. The tumorigenesis, development, dedifferentiation and metastasis of ATC are closely associated with the activation of various tyrosine cascades and inactivation of tumor suppressor genes, including B-Raf proto-oncogene, serine/threonine kinaseV600E, phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit α,tumor protein 53 mutations and telomerase reverse transcriptase mutation. These pathways exert their functions individually or through a complex network. Identification of these mutations may provide a deeper understanding of ATC. A variety of tyrosine kinase inhibitors have been successfully employed for controlling ATC growth in vitro and in xenografts. Certain novel compounds are still in clinical trials. Multi-kinase inhibitors provide a novel approach with great potential. This systematic review determined the prevalence of the major genetic alterations and their inhibitors in ATC.
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Affiliation(s)
- Zongjuan Li
- Department of Radiation Oncology, The Second Affiliated Hospital, Dalian Medical University, Dalian, Liaoning 116027, P.R. China
| | - Yang Zhang
- Department of Radiation Oncology, Yantai Yuhuangding Hospital Affiliated to Qingdao University Medical College, Yantai, Shandong 264000, P.R. China
| | - Ruonan Wang
- Department of Radiation Oncology, The Second Affiliated Hospital, Dalian Medical University, Dalian, Liaoning 116027, P.R. China
| | - Kun Zou
- Department of Radiation Oncology, The First Affiliated Hospital, Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Lijuan Zou
- Department of Radiation Oncology, The Second Affiliated Hospital, Dalian Medical University, Dalian, Liaoning 116027, P.R. China
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11
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Ibrahimpasic T, Ghossein R, Shah JP, Ganly I. Poorly Differentiated Carcinoma of the Thyroid Gland: Current Status and Future Prospects. Thyroid 2019; 29:311-321. [PMID: 30747050 PMCID: PMC6437626 DOI: 10.1089/thy.2018.0509] [Citation(s) in RCA: 120] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND Poorly differentiated thyroid cancer (PDTC) is a rare but clinically highly significant entity because it accounts for most fatalities from non-anaplastic follicular cell-derived thyroid cancer. Due to the relative rarity of the disease and heterogeneous diagnostic criteria, studies on PDTC have been limited. In light of the evolution of ultra-deep next-generation sequencing technologies and through correlation of clinicopathologic and genomic characteristics of PDTC, an improved understanding of the biology of PDTC has been facilitated. Here, the diagnostic criteria, clinicopathologic characteristics, management, and outcomes in PDTC, as well as genomic drivers in PDTC reported in recent next-generation sequencing studies, are reviewed. In addition, future prospects in improving the outcomes in PDTC patients are reviewed. SUMMARY PDTC patients tend to present with adverse clinicopathologic characteristics: older age, male predominance, advanced locoregional disease, and distant metastases. Surgery with clearance of all gross disease can achieve satisfactory locoregional control. However, the majority of PDTC patients die of distant disease. Five-year disease-specific survival for PDTC patients has been reported at 66%. On multivariate analysis, reported predictors of poor survival in PDTC patients have been older age (>45 years), T4a pathological stage, extrathyroidal extension, high mitotic rate, tumor necrosis, and distant metastasis at presentation. BRAFV600E or RAS mutations (27% and 24% of cases, respectively) remain mutually exclusive main drivers in PDTC. TERT promoter mutations represent the most common alteration in PDTC (40%). Mutation in translation initiation factor EIF1AX (11%) and tumor suppressor TP53 (16%) have also been reported in PDTC. High rates of novel mutations (MED12 and RBM10) have been reported in fatal PDTC (15% and 12%, respectively). Chromosome 1q gains represent the most common arm-level alterations in PDTC, and those patients show worse survival rates. Chromosome 22q losses are also found in PDTC and show strong association with RAS mutation. CONCLUSIONS These new insights into the clinicopathologic and molecular characteristics of PDTC, together with further advancement in ultra-deep sequencing technologies, will be conducive in narrowing the focus in order to develop novel targeted therapies and improve the outcomes in PDTC patients.
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Affiliation(s)
- Tihana Ibrahimpasic
- Department of Surgery, Head and Neck Service, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Ronald Ghossein
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Jatin P. Shah
- Department of Surgery, Head and Neck Service, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Ian Ganly
- Department of Surgery, Head and Neck Service, Memorial Sloan Kettering Cancer Center, New York, New York
- Address correspondence to: Ian Ganly, MD, PhD, Department of Surgery, Head and Neck Service, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10065
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12
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Zhang Q, Meng X, Qin G, Xue X, Dang N. Lyn Kinase Promotes the Proliferation of Malignant Melanoma Cells through Inhibition of Apoptosis and Autophagy via the PI3K/Akt Signaling Pathway. J Cancer 2019; 10:1197-1208. [PMID: 30854129 PMCID: PMC6400685 DOI: 10.7150/jca.28908] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 01/05/2019] [Indexed: 01/02/2023] Open
Abstract
Melanoma is a malignant tumor of cutaneous melanocytes that is characterized by high grade malignancy, rapid progression and high mortality. Thus far, its specific etiological mechanism has been unclear. In this study, we discovered that Lyn kinase expression was up-regulated in melanoma tissues and cells. The function of Lyn was determined by knocking down its expression with a lentivirus containing Lyn shRNA and upregulating its expression with pcDNA3.1-Lyn in the melanoma cell lines M14 and A375. The results showed that Lyn knockdown could significantly inhibit the proliferation, migration and invasiveness through its inhibition of apoptosis and autophagy via the PI3K/Akt pathway in melanoma cell lines. This was further confirmed by treatment with PI3K inhibitor BEZ235. Up-regulation of Lyn promoted the expression of p-Akt and Cyclin D1. Additionally, we investigated the effects of Lyn inhibitor Bafetinib on melanoma cells and the results were consistent with Lyn knockdown. Collectively, our results indicated that Lyn plays a carcinogenic role in multiple cellular functions during melanoma development through regulating apoptosis and autophagy via the PI3K/Akt pathway and may be a valuable potential target for the clinical treatment of melanoma.
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Affiliation(s)
- Qianqian Zhang
- Department of Dermatology, Jinan Central Hospital affiliated to Shandong University, Jinan, Shandong Province, China
- Taishan Medical University, Taian, Shandong Province, China
- Department of Dermatology, No. 960 Hospital of The Chinese People's Liberation Army, Taian, Shandong Province, China
| | - Xianguang Meng
- Department of Dermatology, Jinan Central Hospital affiliated to Shandong University, Jinan, Shandong Province, China
| | - Guojing Qin
- Department of Dermatology, Jinan Central Hospital affiliated to Shandong University, Jinan, Shandong Province, China
| | - Xiaotong Xue
- Department of Dermatology, Jinan Central Hospital affiliated to Shandong University, Jinan, Shandong Province, China
- School of Medicine, Shandong University, Jinan, Shandong Province, China
| | - Ningning Dang
- Department of Dermatology, Jinan Central Hospital affiliated to Shandong University, Jinan, Shandong Province, China
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13
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Lin SF, Lin JD, Hsueh C, Chou TC, Yeh CN, Chen MH, Wong RJ. Efficacy of an HSP90 inhibitor, ganetespib, in preclinical thyroid cancer models. Oncotarget 2018; 8:41294-41304. [PMID: 28476040 PMCID: PMC5522292 DOI: 10.18632/oncotarget.17180] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Accepted: 03/30/2017] [Indexed: 11/30/2022] Open
Abstract
Heat shock protein 90 is a molecular chaperon that maintains the correct folding and function of multiple client proteins. The inhibition of heat shock protein 90, which leads to the simultaneous degradation of multiple proteins involved in oncogenic signaling pathways, has revealed an innovative strategy to treat a variety of cancer types. We evaluated the therapeutic effects of ganetespib, a heat shock protein 90 inhibitor, in treating thyroid cancer. Ganetespib effectively inhibited cell proliferation in a dose-dependent manner in eight cell lines originating from four major histologic types of thyroid cancer (papillary, follicular, anaplastic and medullary). Ganetespib decreased cyclin-dependent kinase 1 and arrested cell cycle progression in G2/M phase. The expression of proteins involved in RAS/RAF/ERK and PI3K/AKT/mTOR signaling pathways was also inhibited. The RET level was decreased in a medullary thyroid cancer cell line. Ganetespib increased Bim expression, activated caspase-3 and induced apoptosis. In vivo, ganetespib retarded the tumor growth of anaplastic and medullary thyroid cancer xenografts with acceptable safety profiles. These findings indicate that ganetespib has potential in the treatment of patients with thyroid cancer.
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Affiliation(s)
- Shu-Fu Lin
- Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan
| | - Jen-Der Lin
- Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan
| | - Chuen Hsueh
- Department of Pathology, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Ting-Chao Chou
- Laboratory of Preclinical Pharmacology Core, Memorial Sloan-Kettering Cancer Center, New York, NY, USA.,Current address: PD Science, Inc., Paramus, NJ, USA
| | - Chun-Nan Yeh
- Department of Surgery, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Ming-Huang Chen
- Department of Internal Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Richard J Wong
- Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
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14
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Yuan MH, Wei LX, Zhou RS, Xu HF, Wang JY, Bai QR. Therapeutic effects of adenovirus-mediated CD and NIS expression combined with Na 131I/5-FC on human thyroid cancer. Oncol Lett 2017; 14:7431-7436. [PMID: 29344184 DOI: 10.3892/ol.2017.7175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 04/07/2017] [Indexed: 12/13/2022] Open
Abstract
Thyroid cancer is the most common type of malignant endocrine tumor diagnosed. Previous studies have indicated that gene therapy is the most promising and effective therapeutic method for thyroid cancer. Therefore, in the present study, Na131I/5-fluorocytosine (5-FC) treatment was combined with cytosine deaminase (CD, encoded by the CDA gene) and sodium iodide symporter (NIS, encoded by the SLC5A5 gene) to act together as a therapeutic tool for thyroid cancer. The present study explored the combined cytotoxic effects of adenovirus-mediated CD and NIS under the control of the progression elevated gene-3 (PEG-3) promoter (Ad-PEG-3-CD-NIS) with Na131I/5-FC against the human thyroid cancer TT cell line in vitro. The PEG-3 fragment was obtained by polymerase chain reaction (PCR) using rat genomic DNA as the template, and then Ad-PEG-3-CDA-SLC5A5 was constructed using XbaI. TT cells were transfected by recombinant adenovirus. The method of reverse transcription-quantitative PCR was performed to test the expression of CD and NIS at the level of transcription. The morphological change was assessed by fluorescence microscopy and investigated by western blot analysis. An MTT assay was used to determine the number of living cells inhibited by single or combination therapies on TT cells. The results indicated that the PEG-3 was successfully cloned, and was also positively regulated in 293 cells. CDA and SLC5A5 genes were highly expressed in TT cells. Na131I combined with 5-FC significantly decreased the human thyroid cancer cells. In conclusion, combination therapy of Ad-PEG3-CDA-SLC5A5 and Na131I/5-FC induces significantly more apoptotic characteristics than either single treatment with Ad-PEG-3-CDA-SLC5A5 or Na131I/5-FC, and low doses of Ad-PEG-3-CDA-SLC5A5 enhanced the cytotoxic effects.
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Affiliation(s)
- Meng-Hui Yuan
- Department of Nuclear Medicine, Tangdu Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710038, P.R. China
| | - Long-Xiao Wei
- Department of Nuclear Medicine, Tangdu Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710038, P.R. China
| | - Run-Suo Zhou
- Department of Nuclear Medicine, Tangdu Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710038, P.R. China
| | - Hai-Feng Xu
- Department of Nuclear Medicine, Tangdu Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710038, P.R. China
| | - Jun-Yan Wang
- Department of Nuclear Medicine, Tangdu Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710038, P.R. China
| | - Qian-Rong Bai
- Department of Nuclear Medicine, Tangdu Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710038, P.R. China
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15
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Lin SF, Lin JD, Hsueh C, Chou TC, Wong RJ. Effects of roniciclib in preclinical models of anaplastic thyroid cancer. Oncotarget 2017; 8:67990-68000. [PMID: 28978090 PMCID: PMC5620230 DOI: 10.18632/oncotarget.19092] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 05/23/2017] [Indexed: 12/16/2022] Open
Abstract
Many human cancers have altered cyclin-dependent kinase activity. Inhibition of cyclin-dependent kinases may arrest cell cycle progression and represents an important strategy in the treatment of malignancies. We evaluated the therapeutic effects of roniciclib, a cyclin-dependent kinase inhibitor, as a treatment for anaplastic thyroid cancer. Roniciclib inhibited anaplastic thyroid cancer cell proliferation in a dose-dependent manner. Roniciclib activated caspase-3 activity and induced apoptosis. Cell cycle progression was arrested in G2/M phase. In vivo, the growth of anaplastic thyroid cancer xenograft tumors was retarded by roniciclib treatment without evidence of toxicity. These data provide a rationale for further clinical evaluation using roniciclib in the treatment of patients with anaplastic thyroid cancer.
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Affiliation(s)
- Shu-Fu Lin
- Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan
| | - Jen-Der Lin
- Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan
| | - Chuen Hsueh
- Department of Pathology, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan
| | - Ting-Chao Chou
- Laboratory of Preclinical Pharmacology Core, Memorial Sloan Kettering Cancer Center, New York, NY, USA.,Current address: PD Science, Inc., Paramus, NJ, USA
| | - Richard J Wong
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
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16
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Matrone A, Valerio L, Pieruzzi L, Giani C, Cappagli V, Lorusso L, Agate L, Puleo L, Viola D, Bottici V, Del Re M, Molinaro E, Danesi R, Elisei R. Protein kinase inhibitors for the treatment of advanced and progressive radiorefractory thyroid tumors: From the clinical trials to the real life. Best Pract Res Clin Endocrinol Metab 2017; 31:319-334. [PMID: 28911728 DOI: 10.1016/j.beem.2017.06.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The last ten years have been characterized by the introduction in the clinical practice of new drugs named tyrosine kinase inhibitors for the treatment of several human tumors. After the positive conclusion of two international multicentric, randomized phase III clinical trials, two of these drugs, sorafenib and lenvatinib, have been recently approved and they are now available for the treatment of advanced and progressive radioiodine refractory thyroid tumors. We have been involved in most clinical trials performed with different tyrosine kinase inhibitors in different histotypes of thyroid cancer thus acquiring a lot of experience in the management of both drugs and their adverse events. Aim of this review is to give an overview of both the rationale for the use of these inhibitors in thyroid cancer and the major results of the clinical trials. Some suggestions for the management of treated patients in the real life are also provided.
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Affiliation(s)
- Antonio Matrone
- Unit of Endocrinology, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy
| | - Laura Valerio
- Unit of Endocrinology, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy
| | - Letizia Pieruzzi
- Unit of Endocrinology, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy
| | - Carlotta Giani
- Unit of Endocrinology, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy
| | - Virginia Cappagli
- Unit of Endocrinology, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy
| | - Loredana Lorusso
- Unit of Endocrinology, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy
| | - Laura Agate
- Unit of Endocrinology, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy
| | - Luciana Puleo
- Unit of Endocrinology, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy
| | - David Viola
- Unit of Endocrinology, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy
| | - Valeria Bottici
- Unit of Endocrinology, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy
| | - Marzia Del Re
- Unit of Pharmacology, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy
| | - Eleonora Molinaro
- Unit of Endocrinology, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy
| | - Romano Danesi
- Unit of Pharmacology, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy
| | - Rossella Elisei
- Unit of Endocrinology, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, Italy.
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17
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Clinicopathological significance of loss of p27kip1 expression in papillary thyroid carcinoma. Int J Biol Markers 2017; 32:e255-e259. [PMID: 27834461 DOI: 10.5301/jbm.5000239] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/07/2016] [Indexed: 12/30/2022]
Abstract
INTRODUCTION A meta-analysis was done to investigate the clinicopathological significance of the loss of p27kip1 expression in papillary thyroid carcinoma (PTC). METHODS The meta-analysis involving 17 studies included 1,652 PTC and 328 benign cases. The rate of p27kip1 expression loss in PTC and benign lesions, and the correlations between p27kip1 expression loss and clinicopathological characteristics of PTC were determined. RESULTS The estimated rate of p27kip1 expression loss was 0.557 (95% confidence interval [CI] 0.443-0.665) and 0.139 (95% CI 0.062-0.283) in PTC and benign lesions, respectively. In subgroup analysis, the rates of p27kip1 expression loss were 0.683, 0.393, and 0.414 in the classical variant, follicular variant, and papillary thyroid microcarcinoma, respectively. Loss of p27kip1 expression was significantly correlated with lymph node metastasis and distant metastasis (odds ratio 3.559, 95% CI 1.146-11.056 and 4.735, 95% CI 1.322-16.960, respectively). Extrathyroidal extension was correlated with loss of p27kip1 expression, but not in a statistically significant way (p = 0.051). There were no significant correlations between loss of p27kip1 expression and sex, tumor size, BRAFV600E mutation, and tumor multifocality. CONCLUSIONS Loss of p27kip1 expression is frequently found in PTC compared with benign lesions and normal thyroid tissue. When present in PTC, it is correlated with aggressive tumor behavior.
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18
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Valerio L, Pieruzzi L, Giani C, Agate L, Bottici V, Lorusso L, Cappagli V, Puleo L, Matrone A, Viola D, Romei C, Ciampi R, Molinaro E, Elisei R. Targeted Therapy in Thyroid Cancer: State of the Art. Clin Oncol (R Coll Radiol) 2017; 29:316-324. [PMID: 28318881 DOI: 10.1016/j.clon.2017.02.009] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 02/07/2017] [Indexed: 01/31/2023]
Abstract
Thyroid cancer typically has a good outcome following standard treatments, which include surgery, radioactive iodine ablation for differentiated tumours and treatment with thyrotropine hormone-suppressive levothyroxine. Thyroid cancers that persist or recur following these therapies have a poorer prognosis. Cytotoxic chemotherapy or external beam radiotherapy has a low efficacy in these patients. 'Target therapy' with tyrosine kinase inhibitors (TKIs) represent an important therapeutic option for the treatment of advanced cases of radioiodine refractory (RAI-R) differentiated thyroid cancer (DTC), medullary thyroid cancer (MTC) and possibly for cases of poorly differentiated (PDTC) and anaplastic thyroid cancer (ATC). In the last few years, several TKIs have been tested for the treatment of advanced, progressive and RAI-R thyroid cancers and some of them have been recently approved for use in clinical practice: sorafenib and lenvatinib for DTC and PDTC; vandetanib and cabozantinib for MTC. The objective of this overview is to present the current status of the treatment of advanced DTC, MTC, PDTC and ATC with the use of TKIs by describing the benefits and the limits of their use. A comprehensive analysis and description of the molecular basis of these drugs and the new therapeutic perspectives are also reported. Some practical suggestions are also given for the management to the potential side-effects of these drugs.
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Affiliation(s)
- L Valerio
- Department of Clinical and Experimental Medicine, Endocrine Unit, University of Pisa, Pisa, Italy
| | - L Pieruzzi
- Department of Clinical and Experimental Medicine, Endocrine Unit, University of Pisa, Pisa, Italy
| | - C Giani
- Department of Clinical and Experimental Medicine, Endocrine Unit, University of Pisa, Pisa, Italy
| | - L Agate
- Department of Clinical and Experimental Medicine, Endocrine Unit, University of Pisa, Pisa, Italy
| | - V Bottici
- Department of Clinical and Experimental Medicine, Endocrine Unit, University of Pisa, Pisa, Italy
| | - L Lorusso
- Department of Clinical and Experimental Medicine, Endocrine Unit, University of Pisa, Pisa, Italy
| | - V Cappagli
- Department of Clinical and Experimental Medicine, Endocrine Unit, University of Pisa, Pisa, Italy
| | - L Puleo
- Department of Clinical and Experimental Medicine, Endocrine Unit, University of Pisa, Pisa, Italy
| | - A Matrone
- Department of Clinical and Experimental Medicine, Endocrine Unit, University of Pisa, Pisa, Italy
| | - D Viola
- Department of Clinical and Experimental Medicine, Endocrine Unit, University of Pisa, Pisa, Italy
| | - C Romei
- Department of Clinical and Experimental Medicine, Endocrine Unit, University of Pisa, Pisa, Italy
| | - R Ciampi
- Department of Clinical and Experimental Medicine, Endocrine Unit, University of Pisa, Pisa, Italy
| | - E Molinaro
- Department of Clinical and Experimental Medicine, Endocrine Unit, University of Pisa, Pisa, Italy
| | - R Elisei
- Department of Clinical and Experimental Medicine, Endocrine Unit, University of Pisa, Pisa, Italy.
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19
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Lin SF, Lin JD, Hsueh C, Chou TC, Wong RJ. A cyclin-dependent kinase inhibitor, dinaciclib in preclinical treatment models of thyroid cancer. PLoS One 2017; 12:e0172315. [PMID: 28207834 PMCID: PMC5312924 DOI: 10.1371/journal.pone.0172315] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 02/02/2017] [Indexed: 12/18/2022] Open
Abstract
Background We explored the therapeutic effects of dinaciclib, a cyclin-dependent kinase (CDK) inhibitor, in the treatment of thyroid cancer. Materials and methods Seven cell lines originating from three pathologic types of thyroid cancer (papillary, follicular and anaplastic) were studied. The cytotoxicity of dinaciclib was measured using a lactate dehydrogenase assay. The expression of proteins associated with cell cycle and apoptosis was assessed using Western blot analysis and immunofluorescence microscopy. Cell cycle distribution was measured by flow cytometry and immunofluorescence microscopy. Apoptosis and caspase-3 activity were measured by flow cytometry and fluorometric assay. Mice bearing flank anaplastic thyroid cancer (ATC) were treated with intraperitoneal injections of dinaciclib. Results Dinaciclib inhibited thyroid cancer cell proliferation in a dose-dependent manner. Dinaciclib had a low median-effect dose (≤ 16.0 nM) to inhibit cell proliferation in seven thyroid cancer cell lines. Dinaciclib decreased CDK1, cyclin B1, and Aurora A expression, induced cell cycle arrest in the G2/M phase, and induced accumulation of prophase mitotic cells. Dinaciclib decreased Mcl-1, Bcl-xL and survivin expression, activated caspase-3 and induced apoptosis. In vivo, the growth of ATC xenograft tumors was retarded in a dose-dependent fashion with daily dinaciclib treatment. Higher-dose dinaciclib (50 mg/kg) caused slight, but significant weight loss, which was absent with lower-dose dinaciclib (40 mg/kg) treatment. Conclusions Dinaciclib inhibited thyroid cancer proliferation both in vitro and in vivo. These findings support dinaciclib as a potential drug for further studies in clinical trials for the treatment of patients with refractory thyroid cancer.
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MESH Headings
- Adenocarcinoma, Follicular/drug therapy
- Adenocarcinoma, Follicular/metabolism
- Adenocarcinoma, Follicular/pathology
- Animals
- Apoptosis/drug effects
- Blotting, Western
- Bridged Bicyclo Compounds, Heterocyclic/pharmacology
- Carcinoma/drug therapy
- Carcinoma/metabolism
- Carcinoma/pathology
- Carcinoma, Papillary/drug therapy
- Carcinoma, Papillary/metabolism
- Carcinoma, Papillary/pathology
- Cell Cycle/drug effects
- Cell Proliferation/drug effects
- Cyclic N-Oxides
- Cyclin-Dependent Kinases/antagonists & inhibitors
- Female
- Flow Cytometry
- Humans
- Indolizines
- Mice
- Mice, Nude
- Protein Kinase Inhibitors/pharmacology
- Pyridinium Compounds/pharmacology
- Thyroid Neoplasms/drug therapy
- Thyroid Neoplasms/metabolism
- Thyroid Neoplasms/pathology
- Tumor Cells, Cultured
- Xenograft Model Antitumor Assays
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Affiliation(s)
- Shu-Fu Lin
- Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan
- * E-mail:
| | - Jen-Der Lin
- Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan
| | - Chuen Hsueh
- Department of Pathology, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan
| | - Ting-Chao Chou
- Laboratory of Preclinical Pharmacology Core, Memorial Sloan-Kettering Cancer Center, New York, New York, United States of America
| | - Richard J. Wong
- Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, New York, United States of America
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20
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Nozhat Z, Hedayati M. PI3K/AKT Pathway and Its Mediators in Thyroid Carcinomas. Mol Diagn Ther 2016; 20:13-26. [PMID: 26597586 DOI: 10.1007/s40291-015-0175-y] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Thyroid malignancies are the most common endocrine system carcinomas, with four histopathological forms. The phosphoinositide 3-kinase-protein kinase B/AKT (PI3K-PKB/AKT) pathway is one of the most critical molecular signaling pathways implicated in key cellular processes. Its continuous activation by several aberrant receptor tyrosine kinases (RTKs) and genetic mutations in its downstream effectors result in high cell proliferation in a broad number of cancers, including thyroid carcinomas. In this review article, the role of different signaling pathways of PI3K/AKT in thyroid cancers, with the emphasis on the PI3K/AKT/mammalian target of rapamycin (mTOR), PI3K/AKT/forkhead box O (FOXO) and PI3K/AKT/phosphatase and tensin homolog deleted on chromosome ten (PTEN) pathways, and various therapeutic strategies targeting these pathways have been summarized. In most of the in vitro studies, agents inhibiting mTOR in monotherapy or in combination with chemotherapy for thyroid malignancies have been introduced as promising anticancer therapies. FOXOs and PTEN are two outstanding downstream targets of the PI3K/AKT pathway. At the present time, no study has been undertaken to consider thyroid cancer treatment via FOXOs and PTEN targeting. According to the critical role of these proteins in cell cycle arrest, it seems that a treatment strategy based on the combination of FOXOs or PTEN activity induction with PI3K/AKT downstream mediators (e.g., mTOR) inhibition will be beneficial and promising in thyroid cancer treatment.
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Affiliation(s)
- Zahra Nozhat
- Cellular and Molecular Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Biotechnology Department, School of Advanced Technology in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehdi Hedayati
- Cellular and Molecular Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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21
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Fu J, Zhang N, Chou JH, Dong HJ, Lin SF, Ulrich-Merzenich GS, Chou TC. Drug combination in vivo using combination index method: Taxotere and T607 against colon carcinoma HCT-116 xenograft tumor in nude mice. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.synres.2016.06.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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22
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Zou H, Li L, Garcia Carcedo I, Xu ZP, Monteiro M, Gu W. Synergistic inhibition of colon cancer cell growth with nanoemulsion-loaded paclitaxel and PI3K/mTOR dual inhibitor BEZ235 through apoptosis. Int J Nanomedicine 2016; 11:1947-58. [PMID: 27226714 PMCID: PMC4863683 DOI: 10.2147/ijn.s100744] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Colon cancer is the third most common cancer in the world, with drug resistance and metastasis being the major challenges to effective treatments. To overcome this, combination therapy with different chemotherapeutics is a common practice. In this study, we demonstrated that paclitaxel (PTX) together with BEZ235 exhibited a synergetic inhibition effect on colon cancer cell growth. Furthermore, nanoemulsion (NE)-loaded PTX and BEZ235 were more effective than the free drug, and a combination treatment of both NE drugs increased the efficiency of the treatments. BEZ235 pretreatment before adding PTX sensitized the cancer cells further, suggesting a synergistic inhibition effect through the phosphatidylinositol-3-kinases/protein kinase B/mammalian target of rapamycin pathway. The 50% inhibitory concentrations for BEZ235 were 127.1 nM and 145.0 nM and for PTX 9.7 nM and 9.5 nM for HCT-116 and HT-29 cells, respectively. When loaded with NE the 50% inhibitory concentrations for BEZ235 decreased to 52.6 nM and 55.6 nM and for PTX to 1.9 nM and 2.3 nM for HCT-116 and HT-29 cells, respectively. Combination treatment with 10 nM NE-BEZ235 and 0.6 nM and 1.78 nM NE-PTX could kill 50% of HCT-116 and HT-29, respectively. The cell death caused by the treatment was through apoptotic cell death, which coincided with decreased expression of anti-apoptotic protein B-cell lymphoma 2. Our data indicate that the combination therapy of PTX with the phosphatidylinositol-3-kinases/protein kinase B/mammalian target of rapamycin dual inhibitor BEZ235 using NE delivery may hold promise for a more effective approach for colon cancer treatment.
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Affiliation(s)
- Hong Zou
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Brisbane, QLD, Australia; Department of Pathology, Key Laboratory for Xinjiang Endemic and Ethnic Diseases, Shihezi University School of Medicine, Shihezhi University, Xinjiang, People's Republic of China
| | - Li Li
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Brisbane, QLD, Australia
| | - Ines Garcia Carcedo
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Brisbane, QLD, Australia
| | - Zhi Ping Xu
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Brisbane, QLD, Australia
| | - Michael Monteiro
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Brisbane, QLD, Australia
| | - Wenyi Gu
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Brisbane, QLD, Australia
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Combinatorial Antitumor Effect of Rapamycin and β-Elemene in Follicular Thyroid Cancer Cells. BIOMED RESEARCH INTERNATIONAL 2016; 2016:6723807. [PMID: 27274989 PMCID: PMC4870352 DOI: 10.1155/2016/6723807] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 03/21/2016] [Accepted: 04/10/2016] [Indexed: 11/17/2022]
Abstract
Background. mTOR signaling would be a promising target for thyroid cancer therapy. However, in clinical trials, objective response rate with mTOR inhibitor monotherapy in most cancer types was modest. A new focus on development of combinatorial strategies with rapalogs is increasing. Objective. Investigating the combinatorial antitumor effect of rapamycin and β-elemene in follicular thyroid cancer cells. Methods. MTT assay was used to determine the FTC-133 cell proliferation after culturing with rapamycin and/or β-elemene. To analyze their combinatorial effect, immunoblotting was performed to analyze the activation status of AKT. Moreover, β-elemene attenuated rapamycin-induced immunosuppression was tested in mice. Results. Combination of rapamycin and β-elemene exerted significant synergistic antiproliferative effects in FTC-133 cell lines in vitro, based on inhibiting the AKT feedback activation induced by rapamycin. In vivo, the β-elemene could attenuate rapamycin-induced immunosuppression via reversing imbalance of Treg/Th17, with the underlying mechanism needed to be declared. Conclusions. We demonstrate that the novel combination of mTOR inhibitor with β-elemene synergistically attenuates tumor cell growth in follicular thyroid cancer, which requires additional preclinical validation.
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Viola D, Valerio L, Molinaro E, Agate L, Bottici V, Biagini A, Lorusso L, Cappagli V, Pieruzzi L, Giani C, Sabini E, Passannati P, Puleo L, Matrone A, Pontillo-Contillo B, Battaglia V, Mazzeo S, Vitti P, Elisei R. Treatment of advanced thyroid cancer with targeted therapies: ten years of experience. Endocr Relat Cancer 2016; 23:R185-205. [PMID: 27207700 DOI: 10.1530/erc-15-0555] [Citation(s) in RCA: 120] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 02/27/2016] [Indexed: 12/13/2022]
Abstract
Thyroid cancer is rare, but it is the most frequent endocrine malignancy. Its prognosis is generally favorable, especially in cases of well-differentiated thyroid cancers (DTCs), such as papillary and follicular cancers, which have survival rates of approximately 95% at 40 years. However, 15-20% of cases became radioiodine refractory (RAI-R), and until now, no other treatments have been effective. The same problems are found in cases of poorly differentiated (PDTC) and anaplastic (ATC) thyroid cancers and in at least 30% of medullary thyroid cancer (MTC) cases, which are very aggressive and not sensitive to radioiodine. Tyrosine kinase inhibitors (TKIs) represent a new approach to the treatment of advanced cases of RAI-R DTC, MTC, PDTC, and, possibly, ATC. In the past 10 years, several TKIs have been tested for the treatment of advanced, progressive, and RAI-R thyroid tumors, and some of them have been recently approved for use in clinical practice: sorafenib and lenvatinib for DTC and PDTC and vandetanib and cabozantinib for MTC. The objective of this review is to present the current status of the treatment of advanced thyroid cancer with the use of innovative targeted therapies by describing both the benefits and the limits of their use based on the experiences reported so far. A comprehensive analysis and description of the molecular basis of these therapies, as well as new therapeutic perspectives, are reported. Some practical suggestions are given for both the choice of patients to be treated and their management, with particular regard to the potential side effects.
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Affiliation(s)
- David Viola
- Department of Clinical and Experimental MedicineSection of Endocrinology, University of Pisa, Pisa, Italy
| | - Laura Valerio
- Department of Clinical and Experimental MedicineSection of Endocrinology, University of Pisa, Pisa, Italy
| | - Eleonora Molinaro
- Department of Clinical and Experimental MedicineSection of Endocrinology, University of Pisa, Pisa, Italy
| | - Laura Agate
- Department of Clinical and Experimental MedicineSection of Endocrinology, University of Pisa, Pisa, Italy
| | - Valeria Bottici
- Department of Clinical and Experimental MedicineSection of Endocrinology, University of Pisa, Pisa, Italy
| | - Agnese Biagini
- Department of Clinical and Experimental MedicineSection of Endocrinology, University of Pisa, Pisa, Italy
| | - Loredana Lorusso
- Department of Clinical and Experimental MedicineSection of Endocrinology, University of Pisa, Pisa, Italy
| | - Virginia Cappagli
- Department of Clinical and Experimental MedicineSection of Endocrinology, University of Pisa, Pisa, Italy
| | - Letizia Pieruzzi
- Department of Clinical and Experimental MedicineSection of Endocrinology, University of Pisa, Pisa, Italy
| | - Carlotta Giani
- Department of Clinical and Experimental MedicineSection of Endocrinology, University of Pisa, Pisa, Italy
| | - Elena Sabini
- Department of Clinical and Experimental MedicineSection of Endocrinology, University of Pisa, Pisa, Italy
| | - Paolo Passannati
- Department of Clinical and Experimental MedicineSection of Endocrinology, University of Pisa, Pisa, Italy
| | - Luciana Puleo
- Department of Clinical and Experimental MedicineSection of Endocrinology, University of Pisa, Pisa, Italy
| | - Antonio Matrone
- Department of Clinical and Experimental MedicineSection of Endocrinology, University of Pisa, Pisa, Italy
| | - Benedetta Pontillo-Contillo
- Diagnostic and Interventional RadiologyDepartment of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - Valentina Battaglia
- Diagnostic and Interventional RadiologyDepartment of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - Salvatore Mazzeo
- Diagnostic and Interventional RadiologyDepartment of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - Paolo Vitti
- Department of Clinical and Experimental MedicineSection of Endocrinology, University of Pisa, Pisa, Italy
| | - Rossella Elisei
- Department of Clinical and Experimental MedicineSection of Endocrinology, University of Pisa, Pisa, Italy
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Scapineli JO, Ceolin L, Puñales MK, Dora JM, Maia AL. MEN 2A-related cutaneous lichen amyloidosis: report of three kindred and systematic literature review of clinical, biochemical and molecular characteristics. Fam Cancer 2016; 15:625-33. [DOI: 10.1007/s10689-016-9892-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Abstract
MicroRNAs (miRNAs) are important regulators of multiple cellular processes, and aberrant miRNA expression has been observed in thyroid cancer. However, the role of miRNAs in thyroid cancer metastasis remains largely unknown. In the current study, we found that miR-539 plays a suppressor role in thyroid cancer cell migration and invasion. Luciferase reporter assays confirmed that miR-539 binding to the 3'-UTR region of CARMA1 inhibited the expression of CARMA1 in thyroid cancer cells. Further studies demonstrated that CARMA1 can significantly promote the migration and invasion of thyroid cancer cells. Interestingly, overexpression or knockdown of CARMA1 effectively blocked the effect of miR-539 on the migration and invasion of thyroid cancer cells. Furthermore, we showed that miR-539 expression was frequently downregulated and CARMA1 expression was significantly upregulated in thyroid cancer cell lines and thyroid cancer tissues compared with controls. Taken together, our data indicate that miR-539 is a novel regulator of migration and invasion in human thyroid cancer cells by targeting CARMA1.
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Petrulea MS, Plantinga TS, Smit JW, Georgescu CE, Netea-Maier RT. PI3K/Akt/mTOR: A promising therapeutic target for non-medullary thyroid carcinoma. Cancer Treat Rev 2015; 41:707-13. [PMID: 26138515 DOI: 10.1016/j.ctrv.2015.06.005] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Revised: 06/15/2015] [Accepted: 06/21/2015] [Indexed: 10/23/2022]
Abstract
Thyroid carcinoma (TC) is the most common endocrine malignancy. The pathogenesis of TC is complex and involves multiple genetic events that lead to activation of oncogenic pathways such as the MAP kinase (MAPK) pathway and the PI3K/Akt/mTOR pathway. The PI3K/Akt pathway has emerged as an important player in the pathogenesis of TC, particularly in follicular and advanced anaplastic or poorly differentiated TC. Because these patients have a poor prognosis, particularly when their tumors become resistant to the conventional treatment with radioactive iodine, efforts have been made to identify possible targets for therapy within these pathways. Orally available drugs targeting the PI3K/Akt/mTOR pathway are being used with success in treatment of several types of malignant tumors. There is an increasing amount of preclinical and clinical data supporting that this pathway may represent a promising target for systemic therapy in TC. The present review focuses on the most recent developments on the role of the PI3K/Akt pathway in the pathogenesis of non-medullary TC and will provide insight into how this pathway can be targeted either alone or in the context of multimodal therapeutic strategies for treatment of advanced TC.
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Affiliation(s)
- Mirela S Petrulea
- Department of Endocrinology, University of Medicine and Pharmacy Cluj-Napoca Iuliu Hatieganu, 3-5 Louis Pasteur, 400349 Cluj-Napoca, Romania
| | - Theo S Plantinga
- Department of Internal Medicine, Radboud University Medical Center, Geert Grooteplein Zuid 8, 6525 GA Nijmegen, The Netherlands; Division of Endocrinology, Radboud University Medical Center, Geert Grooteplein Zuid 8, 6525 GA Nijmegen, The Netherlands
| | - Jan W Smit
- Department of Internal Medicine, Radboud University Medical Center, Geert Grooteplein Zuid 8, 6525 GA Nijmegen, The Netherlands; Division of Endocrinology, Radboud University Medical Center, Geert Grooteplein Zuid 8, 6525 GA Nijmegen, The Netherlands
| | - Carmen E Georgescu
- Department of Endocrinology, University of Medicine and Pharmacy Cluj-Napoca Iuliu Hatieganu, 3-5 Louis Pasteur, 400349 Cluj-Napoca, Romania
| | - Romana T Netea-Maier
- Department of Internal Medicine, Radboud University Medical Center, Geert Grooteplein Zuid 8, 6525 GA Nijmegen, The Netherlands; Division of Endocrinology, Radboud University Medical Center, Geert Grooteplein Zuid 8, 6525 GA Nijmegen, The Netherlands..
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Li C, Xin P, Xiao H, Zheng Y, Huang Y, Zhu X. The dual PI3K/mTOR inhibitor NVP-BEZ235 inhibits proliferation and induces apoptosis of burkitt lymphoma cells. Cancer Cell Int 2015; 15:65. [PMID: 26130968 PMCID: PMC4486138 DOI: 10.1186/s12935-015-0213-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Accepted: 06/03/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Phosphatidylinositol 3-kinase/Akt/mammalian target of rapamycin (PI3K/Akt/mTOR) pathway is a therapy target of cancer. We aimed to confirm the effect of dual PI3K/mTOR inhibitor NVP-BEZ235 on cell proliferation and apoptosis in Burkitt lymphoma (BL) cells. METHODS Two human BL cell lines, CA46 and RAJI were used in this study. The proliferation of BL cells was detected by manganese tricarbonyl transfer (MTT) assay. Cell cycle and apoptosis assay were examined by flow cytometric analysis. The phosphorylation levels of AKT (Thr308), AKT (Ser473), and RPS6 were evaluated by western blot analysis. RESULTS NVP-BEZ235 significantly inhibited the proliferation of BL cells (CA46 and RAJI) and the inhibition effect was time and dose-dependent. Cell cycle analysis indicated that the cells (CA46 and RAJI) were mostly arrested in G1/G0 phase. Cell apoptosis assay showed that the late apoptotic cells were significantly increased after 72 h treatment by 100 nmol/L of NVP-BEZ235. In addition, results also found that NVP-BEZ235 reduced the phosphorylation levels of AKT (Thr308), AKT (Ser473), and PRS6 in BL cells (CA46 and RAJI). Moreover, this inhibition effect on phosphorylation was dose-dependent. CONCLUSIONS NVP-BEZ235 effectively inhibited cell proliferation by G0/G1 cell-cycle arrest and induced apoptosis through deregulating PI3K/Akt/mTOR pathway in BL cells.
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Affiliation(s)
- Chuntuan Li
- Department of Haematology, First Hospital of Quanzhou Affiliated to Fujian Medical University, 248 East Street, Licheng District, Quanzhou, 362000 Fujian Province China
| | - Pengliang Xin
- Department of Haematology, First Hospital of Quanzhou Affiliated to Fujian Medical University, 248 East Street, Licheng District, Quanzhou, 362000 Fujian Province China
| | - Huifang Xiao
- Department of Haematology, First Hospital of Quanzhou Affiliated to Fujian Medical University, 248 East Street, Licheng District, Quanzhou, 362000 Fujian Province China
| | - Yan Zheng
- Department of Haematology, First Hospital of Quanzhou Affiliated to Fujian Medical University, 248 East Street, Licheng District, Quanzhou, 362000 Fujian Province China
| | - Yuanling Huang
- Department of Haematology, First Hospital of Quanzhou Affiliated to Fujian Medical University, 248 East Street, Licheng District, Quanzhou, 362000 Fujian Province China
| | - Xiongpeng Zhu
- Department of Haematology, First Hospital of Quanzhou Affiliated to Fujian Medical University, 248 East Street, Licheng District, Quanzhou, 362000 Fujian Province China
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Links TP, Verbeek HHG, Hofstra RMW, Plukker JTM. Endocrine tumours: progressive metastatic medullary thyroid carcinoma: first- and second-line strategies. Eur J Endocrinol 2015; 172:R241-51. [PMID: 25627652 DOI: 10.1530/eje-14-0726] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Accepted: 01/26/2015] [Indexed: 12/15/2022]
Abstract
The treatment for metastasised medullary thyroid cancer is still a topic of discussion. One of the main challenges remains to find effective adjuvant and palliative options for patients with metastatic disease. The diagnostic and treatment strategies for this tumour are discussed and possible new developments commented. Approaches that target rearranged during transfection (RET) are preferable to those that target RET downstream proteins as, theoretically, blocking RET downstream targets will block only one of the many pathways activated by RET. Combining several agents would seem to be more promising, in particular agents that target RET with those that independently target RET signalling pathways or the more general mechanism of tumour progression.
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Affiliation(s)
- Thera P Links
- Department of EndocrinologyUniversity Medical Centre Groningen, University of Groningen, PO Box 30.001, 9700 RB Groningen, The NetherlandsDepartment of GeneticsErasmus Medical Centre, Rotterdam, The NetherlandsDepartment of Surgical OncologyUniversity Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - Hans H G Verbeek
- Department of EndocrinologyUniversity Medical Centre Groningen, University of Groningen, PO Box 30.001, 9700 RB Groningen, The NetherlandsDepartment of GeneticsErasmus Medical Centre, Rotterdam, The NetherlandsDepartment of Surgical OncologyUniversity Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - Robert M W Hofstra
- Department of EndocrinologyUniversity Medical Centre Groningen, University of Groningen, PO Box 30.001, 9700 RB Groningen, The NetherlandsDepartment of GeneticsErasmus Medical Centre, Rotterdam, The NetherlandsDepartment of Surgical OncologyUniversity Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - John Th M Plukker
- Department of EndocrinologyUniversity Medical Centre Groningen, University of Groningen, PO Box 30.001, 9700 RB Groningen, The NetherlandsDepartment of GeneticsErasmus Medical Centre, Rotterdam, The NetherlandsDepartment of Surgical OncologyUniversity Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
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30
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Manfredi GI, Dicitore A, Gaudenzi G, Caraglia M, Persani L, Vitale G. PI3K/Akt/mTOR signaling in medullary thyroid cancer: a promising molecular target for cancer therapy. Endocrine 2015; 48:363-70. [PMID: 25115638 DOI: 10.1007/s12020-014-0380-1] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2014] [Accepted: 08/01/2014] [Indexed: 02/06/2023]
Abstract
The phosphatidylinositol 3-kinase (PI3K)/Akt/mammalian target of rapamycin (mTOR) pathway is a central hub for the regulation of cell proliferation, apoptosis, cell cycle, metabolism, and angiogenesis. Several studies have recently suggested that the PI3K/Akt/mTOR signaling pathway is implicated in the pathogenesis and progression of neuroendocrine tumors. Medullary thyroid cancer (MTC) is a neuroendocrine tumor developing from the C cells of the thyroid. Mutations in the RET proto-oncogene are involved in the pathogenesis of several forms of MTC. The deregulation of the PI3K/Akt/mTOR pathway seems to contribute to the tumorigenic activity of RET proto-oncogene mutations. Targeting this pathway through specific inhibitors at simple or multiple sites may represent an attractive potential therapeutic approach for patients with advanced MTCs. The aim of this review is to examine the role of the PI3K/Akt/mTOR pathway in the development and progression of MTC and the new therapeutic options that target this signaling pathway.
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Affiliation(s)
- Gloria Irene Manfredi
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
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31
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Netea-Maier RT, Klück V, Plantinga TS, Smit JWA. Autophagy in thyroid cancer: present knowledge and future perspectives. Front Endocrinol (Lausanne) 2015; 6:22. [PMID: 25741318 PMCID: PMC4332359 DOI: 10.3389/fendo.2015.00022] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2014] [Accepted: 02/05/2015] [Indexed: 01/01/2023] Open
Abstract
Thyroid cancer is the most common endocrine malignancy. Despite having a good prognosis in the majority of cases, when the tumor is dedifferentiated it does no longer respond to conventional treatment with radioactive iodine, the prognosis worsens significantly. Treatment options for advanced, dedifferentiated disease are limited and do not cure the disease. Autophagy, a process of self-digestion in which damaged molecules or organelles are degraded and recycled, has emerged as an important player in the pathogenesis of different diseases, including cancer. The role of autophagy in thyroid cancer pathogenesis is not yet elucidated. However, the available data indicate that autophagy is involved in several steps of thyroid tumor initiation and progression as well as in therapy resistance and therefore could be exploited for therapeutic applications. The present review summarizes the most recent data on the role of autophagy in the pathogenesis of thyroid cancer and we will provide a perspective on how this process can be targeted for potential therapeutic approaches and could be further explored in the context of multimodality treatment in cancer and personalized medicine.
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Affiliation(s)
- Romana T. Netea-Maier
- Department of Medicine, Division of Endocrinology, Radboud University Nijmegen Medical Center, Nijmegen, Netherlands
| | - Viola Klück
- Department of Medicine, Division of Endocrinology, Radboud University Nijmegen Medical Center, Nijmegen, Netherlands
| | - Theo S. Plantinga
- Department of Medicine, Division of Endocrinology, Radboud University Nijmegen Medical Center, Nijmegen, Netherlands
| | - Johannes W. A. Smit
- Department of Medicine, Division of Endocrinology, Radboud University Nijmegen Medical Center, Nijmegen, Netherlands
- *Correspondence: Johannes W. A. Smit, Department of Medicine, Division of Endocrinology, Radboud University Nijmegen Medical Center, Geert Grooteplein 8, PO Box 9101, Nijmegen 6500 HB, Netherlands e-mail:
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32
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Abstract
The mammalian target of rapamycin (mTOR) has emerged as a potential target for drug development, particularly due to the fact that it plays such a crucial role in cancer biology. In addition, next-generation mTOR inhibitors have become available, marking an exciting new phase in mTOR-based therapy. However, the verdict on their therapeutic efectiveness remains unclear. Here we review phosphatidylinositol-3-kinase (PI3K)/Akt/mTOR signaling as one of the primary mechanisms for sustaining tumor outgrowth and metastasis, recent advances in the development of mTOR inhibitors, and current studies addressing mTOR activation/inhibition in colorectal cancer (CRC). We will also discuss our recent comparative study of diferent mTOR inhibitors in a population of colon cancer stem cells (CSCs), and current major challenges for achieving individualized drug therapy using kinase inhibitors.
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Wells SA, Santoro M. Update: the status of clinical trials with kinase inhibitors in thyroid cancer. J Clin Endocrinol Metab 2014; 99:1543-55. [PMID: 24423326 PMCID: PMC5393476 DOI: 10.1210/jc.2013-2622] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
CONTEXT Thyroid cancer is usually cured by timely thyroidectomy; however, the treatment of patients with advanced disease is challenging because their tumors are mostly unresponsive to conventional therapies. Recently, the malignancy has attracted much interest for two reasons: the dramatic increase in its incidence over the last three decades, and the discovery of the genetic mutations or chromosomal rearrangements causing most histological types of thyroid cancer. OBJECTIVE This update reviews the molecular genetics of thyroid cancer and the clinical trials evaluating kinase inhibitors (KIs) in patients with locally advanced or metastatic disease. The update also reviews studies in other malignancies, which have identified mechanisms of efficacy, and also resistance, to specific KIs. This information has been critical both to the development of effective second-generation drugs and to the design of combinatorial therapeutic regimens. Finally, the update addresses the major challenges facing clinicians who seek to develop more effective therapy for patients with thyroid cancer. RESULTS PubMed was searched from January 2000 to November 2013 using the following terms: thyroid cancer, treatment of thyroid cancer, clinical trials in thyroid cancer, small molecule therapeutics, kinase inhibitors, and next generation sequencing. CONCLUSIONS A new era in cancer therapy has emerged based on the introduction of KIs for the treatment of patients with liquid and solid organ malignancies. Patients with thyroid cancer have benefited from this advance and will continue to do so with the development of drugs having greater specificity and with the implementation of clinical trials of combined therapeutics to overcome drug resistance.
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Affiliation(s)
- Samuel A Wells
- Cancer Genetics Branch (S.A.W.), National Cancer Institute, Bethesda, Maryland 20892; and Dipartimento di Medicina Molecolare e Biotecnologie Mediche (M.S.), Universita' di Napoli "Federico II," 80131 Napoli, Italy
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Vu-Phan D, Koenig RJ. Genetics and epigenetics of sporadic thyroid cancer. Mol Cell Endocrinol 2014; 386:55-66. [PMID: 23933154 PMCID: PMC3867574 DOI: 10.1016/j.mce.2013.07.030] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 07/31/2013] [Accepted: 07/31/2013] [Indexed: 12/23/2022]
Abstract
Thyroid carcinoma is the most common endocrine malignancy, and although the disease generally has an excellent prognosis, therapeutic options are limited for patients not cured by surgery and radioiodine. Thyroid carcinomas commonly contain one of a small number of recurrent genetic mutations. The identification and study of these mutations has led to a deeper understanding of the pathophysiology of this disease and is providing new approaches to diagnosis and therapy. Papillary thyroid carcinomas usually contain an activating mutation in the RAS cascade, most commonly in BRAF and less commonly in RAS itself or through gene fusions that activate RET. A chromosomal translocation that results in production of a PAX8-PPARG fusion protein is found in follicular carcinomas. Anaplastic carcinomas may contain some of the above changes as well as additional mutations. Therapies that are targeted to these mutations are being used in patient care and clinical trials.
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Affiliation(s)
- Dang Vu-Phan
- Department of Internal Medicine, Division of Metabolism, Endocrinology and Diabetes, University of Michigan, Ann Arbor, MI, USA.
| | - Ronald J Koenig
- Department of Internal Medicine, Division of Metabolism, Endocrinology and Diabetes, University of Michigan, Ann Arbor, MI, USA.
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Ahmed M, Hussain AR, Bavi P, Ahmed SO, Al Sobhi SS, Al-Dayel F, Uddin S, Al-Kuraya KS. High prevalence of mTOR complex activity can be targeted using Torin2 in papillary thyroid carcinoma. Carcinogenesis 2014; 35:1564-72. [PMID: 24583924 DOI: 10.1093/carcin/bgu051] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The mammalian target of rapamycin (mTOR) signaling cascade is a key regulatory pathway controlling initiation of messenger RNA in mammalian cells. Although dysregulation of mTOR signaling has been reported earlier in cancers, there is paucity of data about mTOR expression in papillary thyroid carcinoma (PTC). Therefore, in this study, we investigated the presence of mTORC2 and mTORC1 complexes in a large cohort of >500 PTC samples. Our clinical data showed the presence of active mTORC1 and mTORC2 in 81 and 39% of PTC samples, respectively. Interestingly, coexpression of mTORC1 and mTORC2 activity was seen in a 32.5% (164/504) of the PTC studied and this association was statistically significant (P = 0.0244). mTOR signaling complex was also found to be associated with activated AKT and 4E-BP1. In vitro, using Torin2, a second-generation mTOR inhibitor or gene silencing of mTOR expression prevented mTORC1 and mTORC2 activity leading to inactivation of P70S6, 4E-BP1, AKT and Bad. Inhibition of mTOR activity led to downregulation of cyclin D1, a gene regulated by messenger RNA translation via phosphorylation of 4E-BP1. Torin2 treatment also inhibited cell viability and induced caspase-dependent apoptosis via activation of mitochondrial apoptotic pathway in PTC cells. Finally, Torin2 treatment induces anticancer effect on PTC xenograft tumor growth in nude mice via inhibition of mTORC1 and mTORC2 and its associated pathways. Our results suggest that coexpression of mTORC1 and mTORC2 is seen frequently in the clinical PTC samples and dual targeting of mTORC1 and mTORC2 activity may be an attractive therapeutic target for treatment of PTC.
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MESH Headings
- Adaptor Proteins, Signal Transducing/metabolism
- Adenocarcinoma, Follicular/drug therapy
- Adenocarcinoma, Follicular/metabolism
- Adenocarcinoma, Follicular/pathology
- Animals
- Apoptosis/drug effects
- Blotting, Western
- Carcinoma, Papillary/drug therapy
- Carcinoma, Papillary/metabolism
- Carcinoma, Papillary/pathology
- Caspases/metabolism
- Cell Cycle/drug effects
- Cell Cycle Proteins
- Cell Proliferation/drug effects
- Cohort Studies
- Female
- Humans
- Immunoenzyme Techniques
- Male
- Mechanistic Target of Rapamycin Complex 1
- Mechanistic Target of Rapamycin Complex 2
- Mice
- Mice, Nude
- Middle Aged
- Mitochondria/drug effects
- Mitochondria/metabolism
- Multiprotein Complexes/metabolism
- Naphthyridines/pharmacology
- Neoplasm Staging
- Phosphatidylinositol 3-Kinases/metabolism
- Phosphoproteins/metabolism
- Phosphorylation
- Prognosis
- Proto-Oncogene Proteins c-akt/metabolism
- RNA, Small Interfering/genetics
- TOR Serine-Threonine Kinases/antagonists & inhibitors
- TOR Serine-Threonine Kinases/genetics
- TOR Serine-Threonine Kinases/metabolism
- Thyroid Neoplasms/drug therapy
- Thyroid Neoplasms/metabolism
- Thyroid Neoplasms/pathology
- Tissue Array Analysis
- Tumor Cells, Cultured
- Xenograft Model Antitumor Assays
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Affiliation(s)
| | | | | | | | | | - Fouad Al-Dayel
- Department of Pathology, King Faisal Specialist Hospital and Research Center, Riyadh 11211, Saudi Arabia and
| | | | - Khawla S Al-Kuraya
- Human Cancer Genomic Research, Department of Life Science, College of Science and College of Medicine, Al-Faisal University, Riyadh 11533, Saudi Arabia
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Lin SF, Lin JD, Chou TC, Huang YY, Wong RJ. Utility of a histone deacetylase inhibitor (PXD101) for thyroid cancer treatment. PLoS One 2013; 8:e77684. [PMID: 24155971 PMCID: PMC3796495 DOI: 10.1371/journal.pone.0077684] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2013] [Accepted: 09/03/2013] [Indexed: 01/08/2023] Open
Abstract
Background We evaluated the therapeutic effects of the histone deacetylase inhibitor PXD101 alone and in combination with conventional chemotherapy in treating thyroid cancer. Methodology/Principal Findings We studied eight cell lines from four types of thyroid cancer (papillary, follicular, anaplastic and medullary). The cytotoxicity of PXD101 alone and in combination with three conventional chemotherapeutic agents (doxorubicin, paclitaxel and docetaxel) was measured using LDH assay. Western blot assessed expression of acetylation of histone H3, histone H4 and tubulin, proteins associated with apoptosis, RAS/RAF/ERK and PI3K/AKT/mTOR signaling pathways, DNA damage and repair. Apoptosis and intracellular reactive oxygen species (ROS) were measured by flow cytometry. Mice bearing flank anaplastic thyroid cancers (ATC) were daily treated with intraperitoneal injection of PXD101 for 5 days per week. PXD101 effectively inhibited thyroid cancer cell proliferation in a dose-dependent manner. PXD101 induced ROS accumulation and inhibited RAS/RAF/ERK and PI3K/mTOR pathways in sensitive cells. Double-stranded DNA damage and apoptosis were induced by PXD101 in both sensitive and resistant cell lines. PXD101 retarded growth of 8505C ATC xenograft tumors with promising safety. Combination therapy of PXD101with doxorubicin and paclitaxel demonstrated synergistic effects against four ATC lines invitro. Conclusions PXD101 represses thyroid cancer proliferation and has synergistic effects in combination with doxorubicin and paclitaxel in treating ATC. These findings support clinical trials using PXD101 for patients with this dismal disease.
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Affiliation(s)
- Shu-Fu Lin
- Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan, ROC
| | - Jen-Der Lin
- Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan, ROC
| | - Ting-Chao Chou
- Laboratory of Preclinical Pharmacology Core, Memorial Sloan-Kettering Cancer Center, New York, New York, United States of America
| | - Yu-Yao Huang
- Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan, ROC
- * E-mail: (YH); (RJW)
| | - Richard J. Wong
- Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, New York, United States of America
- * E-mail: (YH); (RJW)
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37
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von Roemeling CA, Marlow LA, Kennedy WP, Kennedy GT, Copland JA, Menefee ME. Preclinical evaluation of the mTOR inhibitor, temsirolimus, in combination with the epothilone B analog, ixabepilone in renal cell carcinoma. Am J Cancer Res 2013; 3:390-401. [PMID: 23977448 PMCID: PMC3744018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2013] [Accepted: 08/06/2013] [Indexed: 06/02/2023] Open
Abstract
Historically, metastatic renal cell carcinoma (mRCC) is more resistant to conventional cytotoxic chemotherapeutic agents than other solid tumors. Although significant progress has been made over the last decade with several novel therapeutics, these agents invariably go on to fail, largely due to either intrinsic or acquired resistance. To help overcome, or at least delay resistance, combinatorial therapies utilizing agents with disparate, and ideally complementary, mechanisms of actions are needed. In this report, we assess the novel combination of the mTOR inhibitor, temsirolimus, with the microtubule stabilizing drug ixabepilone in RCC. Our results demonstrate synergy in multiple cell lines of RCC and further evaluation of this combination is warranted in the clinical setting. Activation of the endoplasmic reticulum (ER) stress response pathway may in part explain the combinatorial synergy. We further propose that ER stress induced proteins may serve as early response biomarkers to combinatorial therapy in a clinical trial.
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Affiliation(s)
- Christina A von Roemeling
- Department of Cancer Biology, Mayo Clinic College of Medicine4500 San Pablo Road, Jacksonville, Florida, 32224
| | - Laura A Marlow
- Department of Cancer Biology, Mayo Clinic College of Medicine4500 San Pablo Road, Jacksonville, Florida, 32224
| | - William P Kennedy
- Department of Cancer Biology, Mayo Clinic College of Medicine4500 San Pablo Road, Jacksonville, Florida, 32224
| | - Gregory T Kennedy
- Department of Cancer Biology, Mayo Clinic College of Medicine4500 San Pablo Road, Jacksonville, Florida, 32224
| | - John A Copland
- Department of Cancer Biology, Mayo Clinic College of Medicine4500 San Pablo Road, Jacksonville, Florida, 32224
| | - Michael E Menefee
- Department of Hematology and Oncology, Mayo Clinic College of Medicine4500 San Pablo Road, Jacksonville, Florida, 32224
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