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Lee PWT, Koseki LR, Haitani T, Harada H, Kobayashi M. Hypoxia-Inducible Factor-Dependent and Independent Mechanisms Underlying Chemoresistance of Hypoxic Cancer Cells. Cancers (Basel) 2024; 16:1729. [PMID: 38730681 PMCID: PMC11083728 DOI: 10.3390/cancers16091729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 04/25/2024] [Accepted: 04/26/2024] [Indexed: 05/13/2024] Open
Abstract
In hypoxic regions of malignant solid tumors, cancer cells acquire resistance to conventional therapies, such as chemotherapy and radiotherapy, causing poor prognosis in patients with cancer. It is widely recognized that some of the key genes behind this are hypoxia-inducible transcription factors, e.g., hypoxia-inducible factor 1 (HIF-1). Since HIF-1 activity is suppressed by two representative 2-oxoglutarate-dependent dioxygenases (2-OGDDs), PHDs (prolyl-4-hydroxylases), and FIH-1 (factor inhibiting hypoxia-inducible factor 1), the inactivation of 2-OGDD has been associated with cancer therapy resistance by the activation of HIF-1. Recent studies have also revealed the importance of hypoxia-responsive mechanisms independent of HIF-1 and its isoforms (collectively, HIFs). In this article, we collate the accumulated knowledge of HIF-1-dependent and independent mechanisms responsible for resistance of hypoxic cancer cells to anticancer drugs and briefly discuss the interplay between hypoxia responses, like EMT and UPR, and chemoresistance. In addition, we introduce a novel HIF-independent mechanism, which is epigenetically mediated by an acetylated histone reader protein, ATAD2, which we recently clarified.
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Affiliation(s)
- Peter Wai Tik Lee
- Laboratory of Cancer Cell Biology, Graduate School of Biostudies, Kyoto University, Kyoto 606-8501, Japan (L.R.K.)
| | - Lina Rochelle Koseki
- Laboratory of Cancer Cell Biology, Graduate School of Biostudies, Kyoto University, Kyoto 606-8501, Japan (L.R.K.)
| | - Takao Haitani
- Laboratory of Cancer Cell Biology, Graduate School of Biostudies, Kyoto University, Kyoto 606-8501, Japan (L.R.K.)
- Department of Genome Repair Dynamics, Radiation Biology Center, Graduate School of Biostudies, Kyoto University, Kyoto 606-8501, Japan
- Department of Urology, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Hiroshi Harada
- Laboratory of Cancer Cell Biology, Graduate School of Biostudies, Kyoto University, Kyoto 606-8501, Japan (L.R.K.)
- Department of Genome Repair Dynamics, Radiation Biology Center, Graduate School of Biostudies, Kyoto University, Kyoto 606-8501, Japan
| | - Minoru Kobayashi
- Laboratory of Cancer Cell Biology, Graduate School of Biostudies, Kyoto University, Kyoto 606-8501, Japan (L.R.K.)
- Department of Genome Repair Dynamics, Radiation Biology Center, Graduate School of Biostudies, Kyoto University, Kyoto 606-8501, Japan
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Ayoup MS, Ammar A, Abdel-Hamid H, Amer A, Abu-Serie MM, Nasr SA, Ghareeb DA, Teleb M, Tageldin GN. Challenging the anticolorectal cancer capacity of quinoxaline-based scaffold via triazole ligation unveiled new efficient dual VEGFR-2/MAO-B inhibitors. Bioorg Chem 2024; 143:107102. [PMID: 38211551 DOI: 10.1016/j.bioorg.2024.107102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 12/24/2023] [Accepted: 01/03/2024] [Indexed: 01/13/2024]
Abstract
Monoamine oxidases (MAOs) and vascular endothelial growth factor receptor-2 (VEGFR-2) are promoters of colorectal cancer (CRC) and central signaling nodes in epithelial-mesenchymal transition (EMT) induced by activating hypoxia-inducible factors (HIFs). Herein, a novel series of rationally designed triazole-tethered quinoxalines were synthesized and evaluated against HCT-116 CRC cells. The tailored scaffolds combine the pharmacophoric themes of both VEGFR-2 inhibitors and MAO inhibitors. All the synthesized derivatives were screened utilizing the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay for their possible cytotoxic effects on normal human colonocytes, then evaluated for their anticancer activities against HCT-116 cells overexpressing MAOs. The hit derivatives 11 and 14 exhibited IC50 = 18.04 and 7.850 µM, respectively, against HCT-116cells within their EC100 doses on normal human colonocytes. Wound healing assay revealed their efficient CRC antimetastatic activities recording HCT-116 cell migration inhibition exceeding 75 %. In vitro enzymatic assays demonstrated that both 11 and 14 efficiently inhibited VEGFR-2 (IC50 = 88.79 and 9.910 nM), MAO-A (IC50 = 0.763 and 629.1 nM) and MAO-B (IC50 = 0.488 and 209.6 nM) with observed MAO-B over MAO-A selectivity (SI = 1.546 and 3.001), respectively. Enzyme kinetics studies were performed for both compounds to identify their mode of MAO-B inhibition. Furthermore, qRT-PCR analysis showed that the hits efficiently downregulated HIF-1α in HCT-116cells by 3.420 and 16.96 folds relative to untreated cells. Docking studies simulated their possible binding modes within the active sites of VEGFR-2 and MAO-B to highlight their essential structural determinants of activities. Finally, they recorded in silico drug-like absorption, distribution, metabolism, excretion, and toxicity (ADMET) profiles as well as ligand efficiency metrics.
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Affiliation(s)
- Mohammed Salah Ayoup
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa 31982, Saudi Arabia; Chemistry Department, Faculty of Science, Alexandria University, P.O. Box 426, Alexandria 21321, Egypt.
| | - Ahmed Ammar
- Chemistry Department, Faculty of Science, Alexandria University, P.O. Box 426, Alexandria 21321, Egypt
| | - Hamida Abdel-Hamid
- Chemistry Department, Faculty of Science, Alexandria University, P.O. Box 426, Alexandria 21321, Egypt
| | - Adel Amer
- Chemistry Department, Faculty of Science, Alexandria University, P.O. Box 426, Alexandria 21321, Egypt; Department of Chemistry, College of Science, Taibah University, Al-Madinah Al-Munawarah, Saudi Arabia.
| | - Marwa M Abu-Serie
- Medical Biotechnology Department, Genetic Engineering and Biotechnology Research Institute, City of Scientific Research and Technological Applications (SRTA-City), Egypt
| | - Samah A Nasr
- Bio-screening and Preclinical Trial Lab, Biochemistry Department, Faculty of Science, Alexandria University, 21511 Alexandria, Egypt
| | - Doaa A Ghareeb
- Bio-screening and Preclinical Trial Lab, Biochemistry Department, Faculty of Science, Alexandria University, 21511 Alexandria, Egypt
| | - Mohamed Teleb
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Alexandria University, Alexandria, 21521, Egypt
| | - Gina N Tageldin
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Alexandria University, Alexandria, 21521, Egypt.
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Minisini M, Cricchi E, Brancolini C. Acetylation and Phosphorylation in the Regulation of Hypoxia-Inducible Factor Activities: Additional Options to Modulate Adaptations to Changes in Oxygen Levels. Life (Basel) 2023; 14:20. [PMID: 38276269 PMCID: PMC10821055 DOI: 10.3390/life14010020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 12/13/2023] [Accepted: 12/20/2023] [Indexed: 01/27/2024] Open
Abstract
O2 is essential for the life of eukaryotic cells. The ability to sense oxygen availability and initiate a response to adapt the cell to changes in O2 levels is a fundamental achievement of evolution. The key switch for adaptation consists of the transcription factors HIF1A, HIF2A and HIF3A. Their levels are tightly controlled by O2 through the involvement of the oxygen-dependent prolyl hydroxylase domain-containing enzymes (PHDs/EGNLs), the von Hippel-Lindau tumour suppressor protein (pVHL) and the ubiquitin-proteasome system. Furthermore, HIF1A and HIF2A are also under the control of additional post-translational modifications (PTMs) that positively or negatively regulate the activities of these transcription factors. This review focuses mainly on two PTMs of HIF1A and HIF2A: phosphorylation and acetylation.
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Affiliation(s)
| | | | - Claudio Brancolini
- Lab of Epigenomics, Department of Medicine, Università degli Studi di Udine, 33100 Udine, Italy; (M.M.); (E.C.)
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Lim GH, An JH, Park SM, Youn GH, Oh YI, Seo KW, Youn HY. Macrophage induces anti-cancer drug resistance in canine mammary gland tumor spheroid. Sci Rep 2023; 13:10394. [PMID: 37369757 DOI: 10.1038/s41598-023-37311-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 06/20/2023] [Indexed: 06/29/2023] Open
Abstract
Tumor-associated macrophages (TAMs) play an important role in the tumor microenvironment by producing cytokines and growth factors. Furthermore, TAMs play multifunctional roles in tumor progression, immune regulation, metastasis, angiogenesis, and chemoresistance. Hypoxia in the tumor microenvironment induces tumor-supporting transformation of TAMs, which enhances tumor malignancy through developing anti-cancer resistance, for example. In this study, a hybrid spheroid model of canine mammary gland tumor (MGT) cell lines (CIPp and CIPm) and canine macrophages (DH82) was established. The effects of hypoxia induced by the spheroid culture system on the anti-cancer drug resistance of canine MGT cells were investigated. A hybrid spheroid was created using an ultralow-adhesion plate. The interactions between canine MGT cells and DH82 were investigated using a co-culture method. When co-cultured with DH82, cell viability and expression levels of tumor growth factors and multi-drug resistance genes were increased in canine MGT cells under doxorubicin. Additionally, doxorubicin-induced apoptosis and G2/M cell cycle arrest were attenuated in canine MGT cells co-cultured with DH82. In conclusion, the hybrid spheroid model established in this study reflects the hypoxic TME, allowing DH82 to induce anti-cancer drug resistance in canine MGT cells.
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Affiliation(s)
- Ga-Hyun Lim
- Laboratory of Veterinary Internal Medicine, Department of Veterinary Clinical Science, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
| | - Ju-Hyun An
- Department of Veterinary Emergency and Critical Care Medicine, Institute of Veterinary Science, College of Veterinary Medicine, Kangwon National University, Chuncheon-si, Republic of Korea
| | - Su-Min Park
- Laboratory of Veterinary Internal Medicine, Department of Veterinary Clinical Science, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
| | - Ga-Hee Youn
- Laboratory of Veterinary Internal Medicine, Department of Veterinary Clinical Science, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
| | - Ye-In Oh
- Department of Veterinary Internal Medicine, College of Veterinary Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Kyoung-Won Seo
- Laboratory of Veterinary Internal Medicine, Department of Veterinary Clinical Science, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hwa-Young Youn
- Laboratory of Veterinary Internal Medicine, Department of Veterinary Clinical Science, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea.
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Kang C, Ju S, Kim J, Jung Y. Chloroquine prevents hypoxic accumulation of HIF-1α by inhibiting ATR kinase: implication in chloroquine-mediated chemosensitization of colon carcinoma cells under hypoxia. Pharmacol Rep 2023; 75:211-221. [PMID: 36508076 DOI: 10.1007/s43440-022-00441-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 12/03/2022] [Accepted: 12/05/2022] [Indexed: 12/14/2022]
Abstract
BACKGROUND Chloroquine (CQ) is an effective and safe antimalarial drug that is also used as a disease-modifying antirheumatic drug. Recent studies have shown that CQ can sensitize cancer cells to anti-cancer therapies. METHODS In this study, we investigated the molecular mechanisms underlying CQ-mediated chemosensitization in human colon carcinoma cells. RESULTS CQ prevented hypoxia-inducible factor (HIF)-1α protein induction in human colon carcinoma cells. CQ also suppressed HIF-1 activity, as represented by CQ inhibition of HIF-1-dependent luciferase activity and reduced induction of vascular endothelial growth factor. Under hypoxia, CQ restricted HIF-1α synthesis but did not affect HIF-1α transcription and protein stability. The hypoxic state activated ataxia telangiectasia and Rad3-related (ATR) kinase and increased the level of phosphorylated checkpoint kinase 1, a substrate of ATR kinase; however, this was prevented by CQ. An ATR kinase inhibitor suppressed the hypoxic induction of HIF-1α protein and was as effective as CQ. The cytotoxicity of 5-fluorouracil (5-FU), the first choice for the treatment of colorectal cancer, was attenuated under hypoxia. CQ enhanced the cytotoxicity of 5-FU treatment, which was mimicked by the transient transfection with HIF-1α siRNA. CONCLUSIONS Under hypoxia, CQ-mediated sensitization of colon carcinoma HCT116 cells to 5-FU involves HIF-1 inhibition via ATR kinase suppression.
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Affiliation(s)
- Changyu Kang
- College of Pharmacy, Pusan National University, Busan, 46241, Republic of Korea
| | - Sanghyun Ju
- College of Pharmacy, Pusan National University, Busan, 46241, Republic of Korea
| | - Jaejeong Kim
- College of Pharmacy, Pusan National University, Busan, 46241, Republic of Korea
| | - Yunjin Jung
- College of Pharmacy, Pusan National University, Busan, 46241, Republic of Korea.
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Haitani T, Kobayashi M, Koyasu S, Akamatsu S, Suwa T, Onodera Y, Nam JM, Nguyen PTL, Menju T, Date H, Ogawa O, Harada H. Proteolysis of a histone acetyl reader, ATAD2, induces chemoresistance of cancer cells under severe hypoxia by inhibiting cell cycle progression in S phase. Cancer Lett 2022; 528:76-84. [PMID: 34973392 DOI: 10.1016/j.canlet.2021.12.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 12/01/2021] [Accepted: 12/26/2021] [Indexed: 11/27/2022]
Abstract
Cancer cells acquire chemoresistance in hypoxic regions of solid tumors, which is suggested to be at least partly due to reduction of their proliferative activity. However, molecular mechanisms behind it have not been fully elucidated. Here, we revealed the importance of active proteolysis of a histone acetylation reader, ATPase family AAA domain containing 2 (ATAD2), under hypoxia. We found that inactivation of an O2/Fe2+/α-ketoglutarate-dependent dioxygenase triggered ATAD2 proteolysis by the proteasome system upon severe hypoxia in a hypoxia-inducible factors (HIFs)-independent manner. Consistently, ATAD2 expression levels were markedly lower in perinecrotic hypoxic regions in both xenografted and clinical tumor tissues. The ATAD2 proteolysis was accompanied by a decrease in the amount of acetylated histone H3 lysine 27 and inhibited cell cycle progression from the early to late S phase under severe hypoxia. The retardation of S phase progression induced chemoresistance, which was blocked by overexpression of ATAD2. Together, these results indicate that ATAD2 proteolysis upon severe hypoxia induces chemoresistance of cancer cells through heterochromatinization and the subsequent retardation of S phase progression; therefore, inhibition of ATAD2 proteolysis is expected to be a strategy to overcome chemoresistance of hypoxic tumor cells.
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Affiliation(s)
- Takao Haitani
- Laboratory of Cancer Cell Biology, Graduate School of Biostudies, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan; Department of Genome Dynamics, Radiation Biology Center, Graduate School of Biostudies, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan; Department of Urology, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Minoru Kobayashi
- Laboratory of Cancer Cell Biology, Graduate School of Biostudies, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan; Department of Genome Dynamics, Radiation Biology Center, Graduate School of Biostudies, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Sho Koyasu
- Laboratory of Cancer Cell Biology, Graduate School of Biostudies, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan; Department of Genome Dynamics, Radiation Biology Center, Graduate School of Biostudies, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan; Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8904, Japan
| | - Shusuke Akamatsu
- Department of Urology, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Tatsuya Suwa
- Laboratory of Cancer Cell Biology, Graduate School of Biostudies, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan; Department of Genome Dynamics, Radiation Biology Center, Graduate School of Biostudies, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan; Department of Radiation Oncology and Image-applied Therapy, Graduate School of Medicine, Kyoto University, Kyoto, 606-8507, Japan
| | - Yasuhito Onodera
- Global Center for Biomedical Science and Engineering, Faculty of Medicine, Hokkaido University, Sapporo, 060-8638, Japan
| | - Jin-Min Nam
- Laboratory of Cancer Cell Biology, Graduate School of Biostudies, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan; Department of Genome Dynamics, Radiation Biology Center, Graduate School of Biostudies, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Phuong Thi Lien Nguyen
- Laboratory of Cancer Cell Biology, Graduate School of Biostudies, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan; Department of Genome Dynamics, Radiation Biology Center, Graduate School of Biostudies, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Toshi Menju
- Department of Thoracic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, 606-8507, Japan
| | - Hiroshi Date
- Department of Thoracic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, 606-8507, Japan
| | - Osamu Ogawa
- Department of Urology, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Hiroshi Harada
- Laboratory of Cancer Cell Biology, Graduate School of Biostudies, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan; Department of Genome Dynamics, Radiation Biology Center, Graduate School of Biostudies, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan.
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Anam MB, Istiaq A, Kariya R, Kudo M, Ishtiyaq Ahmad SA, Ito N, Okada S, Ohta K. Ribosome induces transdifferentiation of A549 and H-111-TC cancer cell lines. Biochem Biophys Rep 2021; 26:100946. [PMID: 33644423 PMCID: PMC7887644 DOI: 10.1016/j.bbrep.2021.100946] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 02/02/2021] [Indexed: 12/18/2022] Open
Abstract
Previously we reported that, lactic acid bacteria (LAB) can induce human dermal fibroblast (HDF) cells to form multipotent cell clusters which are able to transdifferentiate into three germ layer derived cell lineages. Later on, we confirmed that ribosome is responsible for the LAB-induced transdifferentiation and ribosomes from diverse organisms can mimic the LAB effect on HDF cells. In our present study we have shown that, upon incorporation of ribosomes, non-small cell lung cancer cell line A549 and gastric tubular adenocarcinoma cell line H-111-TC are transformed into spheroid like morphology those can be transdifferentiated into adipocytes and osteoblast. Our qPCR analysis has revealed that, during the formation of ribosome induced cancer cell spheroids, the expression of the cancer cell associated markers and cell cycle/proliferation markers were altered at different time point. Through our investigation, here we report a novel and a non-invasive approach for cancer cell reprogramming by incorporating ribosomes.
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Affiliation(s)
- Mohammad Badrul Anam
- Department of Developmental Neurobiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556, Japan.,HIGO Program, Kumamoto University, Kumamoto, 860-8556, Japan.,Stem Cell-Based Tissue Regeneration Research and Education Unit, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Arif Istiaq
- Department of Developmental Neurobiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556, Japan.,Department of Stem Cell Biology, Faculty of Arts and Science, Kyushu University, Fukuoka, 819-0395, Japan.,HIGO Program, Kumamoto University, Kumamoto, 860-8556, Japan.,Stem Cell-Based Tissue Regeneration Research and Education Unit, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Ryusho Kariya
- Division of Hematopoiesis, Joint Research Center for Human Retrovirus Infection, Kumamoto University, Kumamoto, 860-0811, Japan
| | - Mikiko Kudo
- Department of Developmental Neurobiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556, Japan.,Department of Stem Cell Biology, Faculty of Arts and Science, Kyushu University, Fukuoka, 819-0395, Japan
| | - Shah Adil Ishtiyaq Ahmad
- Department of Developmental Neurobiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556, Japan.,Stem Cell-Based Tissue Regeneration Research and Education Unit, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan.,Department of Biotechnology and Genetic Engineering, Mawlana Bhashani Science and Technology University, Tangail, Bangladesh
| | - Naofumi Ito
- Department of Developmental Neurobiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556, Japan.,Stem Cell-Based Tissue Regeneration Research and Education Unit, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Seiji Okada
- Division of Hematopoiesis, Joint Research Center for Human Retrovirus Infection, Kumamoto University, Kumamoto, 860-0811, Japan
| | - Kunimasa Ohta
- Department of Developmental Neurobiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556, Japan.,Department of Stem Cell Biology, Faculty of Arts and Science, Kyushu University, Fukuoka, 819-0395, Japan.,HIGO Program, Kumamoto University, Kumamoto, 860-8556, Japan.,Stem Cell-Based Tissue Regeneration Research and Education Unit, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan.,AMED Core Research for Evolutional Science and Technology (AMED-CREST), Japan Agency for Medical Research and Development (AMED), Chiyoda-ku, Tokyo, 100-0004, Japan
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Zhan J, Zhong J, Ma S, Ma W, Wang Y, Yu Z, Cai Y, Huang W. Dual-responsive self-assembly in lysosomes enables cell cycle arrest for locking glioma cell growth. Chem Commun (Camb) 2021; 56:6957-6960. [PMID: 32436508 DOI: 10.1039/c9cc09983b] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Herein we first report a dual-responsive peptide substrate (Comp. 1) for preparing self-assembled nanomaterials triggered by pH and legumain. The dual-responsive self-assembly of Comp. 1 in glioma cells enables its long retention time in lysosomes, S phase arrest, and cell growth locking. We verified that the blocked degradation of HIF-1α in lysosomes played a key role in cell cycle arrest and decreased DNA replication. This work illustrates the disturbance of lysosomal function by self-assembled nanomaterials as a promising strategy for inhibiting glioma cell growth.
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Affiliation(s)
- Jie Zhan
- Shunde Hospital, Southern Medical University, the First People's Hospital of Shunde, Foshan 528300, P. R. China
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9
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Sun YJ, Hsu CH, Ling TY, Liu L, Lin TC, Jakfar S, Young IC, Lin FH. The preparation of cell-containing microbubble scaffolds to mimic alveoli structure as a 3D drug-screening system for lung cancer. Biofabrication 2020; 12:025031. [PMID: 32084662 DOI: 10.1088/1758-5090/ab78ee] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Cancer is the leading cause of mortality worldwide, and lung cancer is the most malignant. However, the high failure rate in oncology drug development from in vitro studies to in vivo preclinical models indicates that the modern methods of evaluating drug efficacies in vitro are not reliable. Traditional 2D cell culture has proved inadequate to mimic real physiological conditions. Current 3D cell culture methods do not represent the delicate structure of lung alveoli. To mimic lung alveoli structure, a cell-containing enzyme-crosslinked gelatin microbubble scaffold was produced by mixing surfactant-containing gelatin solution with microbial transglutaminase (mTGase)-mixed A549 cell suspension in a four-channel flow-focusing microfluidic device. With uniform pore size of about 100 μm in diameter, this gelatin microbubble scaffold resembled the lung alveoli in structure and in mechanical properties with good biocompatibility. Effective gemcitabine concentration required to induce cell death in microbubble scaffolds was significantly higher than in 2D culture together with a longer treatment time. Cell death mechanisms were confirmed to be gemcitabine-induced cell apoptosis through Western blotting and real-time polymerase chain reaction. H&E staining and TUNEL assay showed rounded cells with DNA damage in drug-treated scaffolds. Taken together, the cell-containing microbubble scaffolds successfully mimicked lung alveoli in structure and cellular responses after gemcitabine treatment were similar to clinical regimen of treating lung carcinoma. The microbubble scaffold is promising to facilitate anticancer drug discovery by providing more accurate preclinical predictions.
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Affiliation(s)
- Yu-Jun Sun
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, No. 49, Fanglan Rd, Taipei 10672, Taiwan
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11
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Nuvoli B, Amadio B, Cortese G, Benedetti S, Antoniani B, Soriani A, Carosi M, Strigari L, Galati R. The effect of CELLFOOD TM on radiotherapy or combined chemoradiotherapy: preclinical evidence. Ther Adv Med Oncol 2019; 11:1758835919878347. [PMID: 31662796 PMCID: PMC6792276 DOI: 10.1177/1758835919878347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 09/04/2019] [Indexed: 11/16/2022] Open
Abstract
Background Based on previous observations that the nutraceutical CELLFOOD™ (CF), the 'physiological modulator' that aimed to make oxygen available 'on demand', inhibits the growth of cancer cells, this study was designed to investigate the role of CF in the regulation of hypoxia-inducible factor 1 alpha (HIF1α) and its correlated proteins, phosphoglycerate kinase 1 and vascular endothelial growth factor. Our idea was that CF, acting on HIF1α, in combination with current anticancer therapies could improve their effectiveness. Methods To evaluate the effect of CF in association with radiotherapy and chemotherapy, different human cancer cell lines and mice with mesothelioma were analysed by tumour growth, clonogenic assay, western blot and immunohistochemical analysis. Results CF in combination with radiation with or without cisplatin increases the death rate of cancer cells. In vivo, 70% of mice treated with CF before the mesothelioma graft did not show any tumour growth, indicating a possible preventive effect of CF. Moreover, in mouse mesothelioma xenografts, CF improves the effect of radiotherapy also in combination with chemotherapy treatment. Immunohistochemical analysis of tumour explants showed that HIF1α expression was reduced by the combination of CF and radiotherapy treatment and even more by the combination of CF and radiotherapy and chemotherapy treatment. Mechanistically, CF increases the fraction of oxygenated cells, making the radiotherapy more effective with a greater production of reactive oxygen species (ROS) that in turn, reduce the HIF1α expression. This effect is amplified by further increase in ROS from chemotherapy. Conclusions Collectively, results from preclinical trials suggest that CF could be a useful intervention to improve the efficacy of radiotherapy or combined treatment strategies and could be a promising treatment modality to counteract cancer.
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Affiliation(s)
- Barbara Nuvoli
- Preclinical Models and New Therapeutic Agent Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Bruno Amadio
- SAFU Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Giancarlo Cortese
- SAFU Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Serena Benedetti
- Department of Biomolecular Sciences, University of Urbino 'Carlo Bo', Urbino, Italy
| | - Barbara Antoniani
- Anatomy Pathology Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Antonella Soriani
- Laboratory of Medical Physics and Expert Systems, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Mariantonia Carosi
- Anatomy Pathology Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Lidia Strigari
- Laboratory of Medical Physics and Expert Systems, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Rossella Galati
- Preclinical Models and New Therapeutic Agent Unit, IRCCS Regina Elena National Cancer Institute, Via Chianesi, Rome 00144, Italy
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12
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Jeong GJ, Kang D, Kim AK, Han KH, Jeon HR, Kim DI. Metabolites can regulate stem cell behavior through the STAT3/AKT pathway in a similar trend to that under hypoxic conditions. Sci Rep 2019; 9:6112. [PMID: 30992510 PMCID: PMC6468014 DOI: 10.1038/s41598-019-42669-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 11/30/2018] [Indexed: 11/16/2022] Open
Abstract
Stem cell therapy has long been considered a promising mode of treatment for many incurable diseases. Human mesenchymal stem cells (hMSCs) have provided the most promising results to date for regenerative medicine. Nevertheless, due to several obstacles such as difficulty in sourcing and characterizing hMSCs, they remain largely unavailable for clinical use. The signaling requirements for maintaining stem cell function have been studied widely, but little is known about how metabolism contributes to stem cell function. hMSCs have been shown to promote therapeutic efficacy in hypoxic conditions through metabolic conversion. According to published studies, certain metabolites are able to convert stem cell metabolism from oxidative phosphorylation to glycolysis. In this study, we selected several metabolites (fructose-1,6-bisphosphate (FBP), Phosphoenolpyruvic acid (PEP) and sodium oxalate (OXA)) to examine the relation between metabolites and stem cell functions. In addition, we investigated the ability of selected metabolites to induce rapid expansion of this cell population. Our results indicate that selected metabolites stimulate stem cell proliferation by induce glycolytic metabolism via AKT/STAT signaling.
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Affiliation(s)
- Gun-Jae Jeong
- Division of Vascular Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Donglim Kang
- Division of Vascular Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Ae-Kyeong Kim
- Division of Vascular Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Kyu-Hyun Han
- Division of Vascular Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Hye Ran Jeon
- Division of Vascular Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Dong-Ik Kim
- Division of Vascular Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
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Geniposide alleviates hypoxia-induced injury by down-regulation of lncRNA THRIL in rat cardiomyocytes derived H9c2 cells. Eur J Pharmacol 2019; 854:28-38. [PMID: 30953616 DOI: 10.1016/j.ejphar.2019.03.058] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 03/20/2019] [Accepted: 03/28/2019] [Indexed: 12/24/2022]
Abstract
Geniposide (GEN) is an iridoid glycoside extracts from Gardenia jasminoides Ellis with antioxidant and anti-inflammarory properties. The objective of this study was to explore the effects of GEN on a cell model of myocardial infarction (MI). After transfection, hypoxia-stimulated H9c2 cells were treated with GEN. Cell viability and apoptosis were detected by Cell Counting kit-8 assay and flow cytometry, respectively. Cell cycle-, apoptosis- and signal pathway related proteins were examined by Western blot. The expression of THRIL was determined by qRT-PCR. In addition, in vivo experiments were performed in rats. Then the infarct size and the left ventricular (LV) end diastolic diameter (LVEDD), LV ejection fraction (LVEF) and LV fractional shortening (LVFS) were monitored. Results showed that treating H9c2 cells with GEN attenuated hypoxia-induced cell damage as cell viability was increased, and cell apoptosis was repressed. Meanwhile, THRIL was found to be down-regulated by GEN. The cardioprotective effects of GEN on H9c2 cells were attenuated when THRIL was overexpressed. Besides this, the phosphorylation of PI3K, AKT, JAK1 and STAT3 were up-regulated by GEN while down-regulated by THRIL overexpression. Moreover, GEN decreased infarct size and LVEDD, while increased LVEF and LVFS. Taken together, this study demonstrated that GEN alleviated cardiomyocytes damage and cardiac dysfunction possible through down-regulation of THRIL.
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14
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Hu C, Zhuang W, Qiao Y, Liu B, Liu L, Hui K, Jiang X. Effects of combined inhibition of STAT3 and VEGFR2 pathways on the radiosensitivity of non-small-cell lung cancer cells. Onco Targets Ther 2019; 12:933-944. [PMID: 30774379 PMCID: PMC6357889 DOI: 10.2147/ott.s186559] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Purpose The goals of this study were to determine the effects of combined inhibition of STAT3 and vascular endothelial growth factor receptor 2 (VEGFR2) pathways on the radiosensitivity of non-small-cell lung cancer (NSCLC) cells, and to assess the underlying mechanisms. Methods The expressions of VEGFR2, STAT3, related signaling molecules, hypoxia-inducible factor 1-alpha (HIF-1α), and cyclin D1 were determined by Western blotting. Radiosensitivity was assessed using the colony-forming assay, and cell cycle and cell death were analyzed by flow cytometry. A nude mouse xenograft tumor model of Calu-1 cells was established. The hepatorenal toxicity of the above-mentioned treatment on tumor-bearing mice was observed by H&E staining. The expression of STAT3, VEGFR2, HIF-1α, and cyclin D1 of the transplanted tumor tissues was detected by immunohistochemistry. Apoptosis of tumor tissues was evaluated by TUNEL staining. Results In vitro, we selected two cell lines with high expression levels of STAT3, including Calu-1 cells that exhibit high VEGFR2 expression and A549 cells that exhibit low VEGFR2 expression. When apatinib treatment was combined with S3I-201, the expression of VEGFR2, STAT3, and their downstream signaling molecules was significantly decreased (P<0.01). There was an increase in cell death and G2/M phase arrest after treatments, with the most significant changes occurring upon dual inhibition of STAT3 and VEGFR2 (P<0.01). In vivo, combined treatment of radiotherapy and dual inhibition of VEGFR2 and STAT3 was well tolerated and did not deliver additional toxicity. Compared with the control group and the radiation treatment (RT) + apatinib or RT + S3I-201 duplex group, the expression level of STAT3, p-STAT3, VEGFR2, HIF-1α, and cyclin D1 in the triple group (RT + apatinib + S3I-201) was the lowest, and the proportion of apoptotic cells was the highest (P<0.05). Conclusion The combined inhibition of VEGFR2 and STAT3 is effective in enhancing radiosensitizing effects in NSCLC cells.
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Affiliation(s)
- Chenxi Hu
- Tumor Laboratory, Department of Oncology, The Affiliated Lianyungang Hospital of Xuzhou Medical University, Lianyungang City 222002, China, ,
| | - Wei Zhuang
- Department of Oncology, The Affiliated Lianyungang Hospital of Xuzhou Medical University, Lianyungang City 222002, China,
| | - Yun Qiao
- Department of Oncology, The Affiliated Lianyungang Hospital of Xuzhou Medical University, Lianyungang City 222002, China,
| | - Bin Liu
- Department of Oncology, The Affiliated Lianyungang Hospital of Xuzhou Medical University, Lianyungang City 222002, China,
| | - Liang Liu
- Department of Oncology, The Affiliated Lianyungang Hospital of Xuzhou Medical University, Lianyungang City 222002, China,
| | - Kaiyuan Hui
- Tumor Laboratory, Department of Oncology, The Affiliated Lianyungang Hospital of Xuzhou Medical University, Lianyungang City 222002, China, ,
| | - Xiaodong Jiang
- Tumor Laboratory, Department of Oncology, The Affiliated Lianyungang Hospital of Xuzhou Medical University, Lianyungang City 222002, China, , .,Department of Oncology, The Affiliated Lianyungang Hospital of Xuzhou Medical University, Lianyungang City 222002, China,
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Pilli VS, Datta A, Afreen S, Catalano D, Szabo G, Majumder R. Hypoxia downregulates protein S expression. Blood 2018; 132:452-455. [PMID: 29784640 PMCID: PMC6071559 DOI: 10.1182/blood-2018-04-841585] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Affiliation(s)
- Vijaya S Pilli
- Department of Biochemistry and Molecular Biology, LSU Health Sciences Center, New Orleans, LA; and
| | - Arani Datta
- Department of Biochemistry and Molecular Biology, LSU Health Sciences Center, New Orleans, LA; and
| | - Sadaf Afreen
- Department of Biochemistry and Molecular Biology, LSU Health Sciences Center, New Orleans, LA; and
| | - Donna Catalano
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA
| | - Gyongyi Szabo
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA
| | - Rinku Majumder
- Department of Biochemistry and Molecular Biology, LSU Health Sciences Center, New Orleans, LA; and
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16
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Gorga A, Rindone G, Regueira M, Riera MF, Pellizzari EH, Cigorraga SB, Meroni SB, Galardo MN. HIF involvement in the regulation of rat Sertoli cell proliferation by FSH. Biochem Biophys Res Commun 2018; 502:508-514. [PMID: 29859192 DOI: 10.1016/j.bbrc.2018.05.206] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 05/30/2018] [Indexed: 12/31/2022]
Abstract
The final number of Sertoli cells reached during the proliferative periods determines sperm production capacity in adulthood. It is well known that FSH increases the rate of proliferation of Sertoli cells; however, little is known about the transcription factors that are activated by the hormone in order to regulate Sertoli cell proliferation. On the other hand, Hypoxia Inducible Factors (HIFs) are master regulators of cell growth. HIFs are dimers of HIF-β and HIF-α subunits. Considering that HIF-β is constitutively expressed, HIF transcriptional activity is regulated through the abundance of HIF-α subunits. To date, three HIF-α isoforms have been described. The association of the different HIF-α subunits with HIF-β subunit constitutes three active transcription factors -HIF-1, HIF-2 and HIF-3- which interact with consensus hypoxia-response elements in the promoter region of target genes. Hypoxia has been classically considered the main stimulus that increases HIF transcriptional activity, however, regulation by hormones under normoxic conditions was also demonstrated. The aim of this work has been to investigate whether HIFs participate in the regulation of rat Sertoli cell proliferation by FSH. Sertoli cells obtained from 8-day old rats were cultured in the absence or presence of FSH. It has been observed that FSH increases HIF transcriptional activity and HIF-2α mRNA levels without modifying either HIF-1α or HIF-3α expression. Incubations with FSH have been also performed in the absence or presence of a pharmacological agent that promotes HIF-α subunit degradation, LW6. It has been observed that LW6 inhibits the FSH effect on proliferation, CCND1 expression and c-Myc transcriptional activity. Altogether, these results suggest that HIFs might be involved in the regulation of Sertoli cell proliferation by FSH.
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Affiliation(s)
- Agostina Gorga
- Centro de Investigaciones Endocrinológicas "Dr. César Bergadá" (CEDIE) CONICET-FEI-División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Buenos Aires, Argentina
| | - Gustavo Rindone
- Centro de Investigaciones Endocrinológicas "Dr. César Bergadá" (CEDIE) CONICET-FEI-División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Buenos Aires, Argentina
| | - Mariana Regueira
- Centro de Investigaciones Endocrinológicas "Dr. César Bergadá" (CEDIE) CONICET-FEI-División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Buenos Aires, Argentina
| | - María Fernanda Riera
- Centro de Investigaciones Endocrinológicas "Dr. César Bergadá" (CEDIE) CONICET-FEI-División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Buenos Aires, Argentina
| | - Eliana Herminia Pellizzari
- Centro de Investigaciones Endocrinológicas "Dr. César Bergadá" (CEDIE) CONICET-FEI-División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Buenos Aires, Argentina
| | - Selva Beatriz Cigorraga
- Centro de Investigaciones Endocrinológicas "Dr. César Bergadá" (CEDIE) CONICET-FEI-División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Buenos Aires, Argentina
| | - Silvina Beatriz Meroni
- Centro de Investigaciones Endocrinológicas "Dr. César Bergadá" (CEDIE) CONICET-FEI-División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Buenos Aires, Argentina
| | - María Noel Galardo
- Centro de Investigaciones Endocrinológicas "Dr. César Bergadá" (CEDIE) CONICET-FEI-División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Buenos Aires, Argentina.
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17
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Zhang B, Li YL, Zhao JL, Zhen O, Yu C, Yang BH, Yu XR. Hypoxia-inducible factor-1 promotes cancer progression through activating AKT/Cyclin D1 signaling pathway in osteosarcoma. Biomed Pharmacother 2018; 105:1-9. [PMID: 29807229 DOI: 10.1016/j.biopha.2018.03.165] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 03/27/2018] [Accepted: 03/28/2018] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVE Osteosarcoma is an aggressive malignant neoplasm, which commonly afflicts patients of 20-30 years of age, and its morbidity has increased markedly in recent years. Certain genes and signal pathways have been identified to exert key roles in osteosarcoma progression. Here, we set out to characterize in more detail of the role of HIF-1/AKT/Cyclin D1 pathway in the progression of osteosarcoma. METHODS Immunohistochemistry, western blot and qPCR were used to test the protein or mRNA levels of HIF-1 in osteosarcoma tissues or adjacent nontumor tissues. MTT, clone formation, wound healing, Transwell, in vivo tumorigenesis, flow cytometry and western blot analysis were used to determine cell proliferation, clone formation ability, migration, invasion, tumorigenesis, and cell apoptosis in MG63 and U2OS cells, respectively. Immunoprecipitation and immunofluorescence assays were performed to investigate the protein-protein interaction between HIF-1α and proteins related to signal pathways. RESULTS HIF-1 was overexpressed in osteosarcoma tissues and cell lines, which promoted cell proliferation, clone formation, migration, invasion and inhibited cell apoptosis. Results also demonstrated that HIF-1 combined with AKT, and there might be a positive loop between the two proteins of HIF-1 and AKT, then the protein-protein interaction up-regulated the expression of Cyclin D1 in protein level, but not mRNA level, made Cyclin D1 protein more stable, triggered cell proliferation, clone formation, tumorigenesis, but inhibited cell apoptosis. CONCLUSIONS The present study showed that HIF-1 modulated Cyclin D1 expression might through shaping a positive loop with AKT proteins. Additionally, HIF-1α promoted the tumor cells growth, migration and invasion in osteosarcoma through the activation of the AKT/Cyclin D1 signal cascade. We proposed that HIF-1 could be served as a marker for distinguishing osteosarcoma and an effective therapeutic target for osteosarcoma.
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Affiliation(s)
- Bo Zhang
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China; 3201 Hosptial Affiliated to Xi'an Jiaotong University, Hanzhong, Shaanxi, 723000,China
| | - Ya-Li Li
- 3201 Hosptial Affiliated to Xi'an Jiaotong University, Hanzhong, Shaanxi, 723000,China
| | - Jin-Long Zhao
- 3201 Hosptial Affiliated to Xi'an Jiaotong University, Hanzhong, Shaanxi, 723000,China
| | - Ouyang Zhen
- 3201 Hosptial Affiliated to Xi'an Jiaotong University, Hanzhong, Shaanxi, 723000,China
| | - Chao Yu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China
| | - Bin-Hui Yang
- 3201 Hosptial Affiliated to Xi'an Jiaotong University, Hanzhong, Shaanxi, 723000,China
| | - Xiao-Rui Yu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China; Key laboratory of Environment and Genes Related to Disease(Xi'an Jiaotong University), Ministry of Education, Xi'an, Shaanxi 710061, China.
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18
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Zhang B, Ye H, Yang A. Mathematical modelling of interacting mechanisms for hypoxia mediated cell cycle commitment for mesenchymal stromal cells. BMC SYSTEMS BIOLOGY 2018; 12:35. [PMID: 29606139 PMCID: PMC5879778 DOI: 10.1186/s12918-018-0560-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 03/14/2018] [Indexed: 12/20/2022]
Abstract
Background Existing experimental data have shown hypoxia to be an important factor affecting the proliferation of mesenchymal stromal cells (MSCs), but the contrasting observations made at various hypoxic levels raise the questions of whether hypoxia accelerates proliferation, and how. On the other hand, in order to meet the increasing demand of MSCs, an optimised bioreactor control strategy is needed to enhance in vitro production. Results A comprehensive, single-cell mathematical model has been constructed in this work, which combines cellular oxygen sensing with hypoxia-mediated cell cycle progression to predict cell cycle commitment as a proxy to proliferation rate. With oxygen levels defined for in vitro cell culture, the model predicts enhanced proliferation under intermediate (2–8%) and mild (8–15%) hypoxia and cell quiescence under severe (< 2%) hypoxia. Global sensitivity analysis and quasi-Monte Carlo simulation revealed that within a certain range (+/− 100%), model parameters affect (with varying significance) the minimum commitment time, but the existence of a range of optimal oxygen tension could be preserved with the hypothesized effects of Hif2α and reactive oxygen species (ROS). It appears that Hif2α counteracts Hif1α and ROS-mediated protein deactivation under intermediate hypoxia and normoxia (20%), respectively, to regulate the response of cell cycle commitment to oxygen tension. Conclusion Overall, this modelling study offered an integrative framework to capture several interacting mechanisms and allowed in silico analysis of their individual and collective roles in shaping the hypoxia-mediated commitment to cell cycle. The model offers a starting point to the establishment of a suitable mechanism that can satisfactorily explain the different existing experimental observations from different studies, and warrants future extension and dedicated experimental validation to eventually support bioreactor optimisation. Electronic supplementary material The online version of this article (10.1186/s12918-018-0560-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Bo Zhang
- Department of Engineering Science, University of Oxford, Oxford, UK.,Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford, UK
| | - Hua Ye
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford, UK
| | - Aidong Yang
- Department of Engineering Science, University of Oxford, Oxford, UK.
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19
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Senavirathna LK, Huang C, Yang X, Munteanu MC, Sathiaseelan R, Xu D, Henke CA, Liu L. Hypoxia induces pulmonary fibroblast proliferation through NFAT signaling. Sci Rep 2018; 8:2709. [PMID: 29426911 PMCID: PMC5807313 DOI: 10.1038/s41598-018-21073-x] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Accepted: 01/23/2018] [Indexed: 11/09/2022] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a chronic, progressive and typically fatal lung disease with a very low survival rate. Excess accumulation of fibroblasts, myofibroblasts and extracellular matrix creates hypoxic conditions within the lungs, causing asphyxiation. Hypoxia is, therefore, one of the prominent features of IPF. However, there have been few studies concerning the effects of hypoxia on pulmonary fibroblasts. In this study, we investigated the molecular mechanisms of hypoxia-induced lung fibroblast proliferation. Hypoxia increased the proliferation of normal human pulmonary fibroblasts and IPF fibroblasts after exposure for 3–6 days. Cell cycle analysis demonstrated that hypoxia promoted the G1/S phase transition. Hypoxia downregulated cyclin D1 and A2 levels, while it upregulated cyclin E1 protein levels. However, hypoxia had no effect on the protein expression levels of cyclin-dependent kinase 2, 4, and 6. Chemical inhibition of hypoxia-inducible factor (HIF)-2 reduced hypoxia-induced fibroblast proliferation. Moreover, silencing of Nuclear Factor Activated T cell (NFAT) c2 attenuated the hypoxia-mediated fibroblasts proliferation. Hypoxia also induced the nuclear translocation of NFATc2, as determined by immunofluorescence staining. NFAT reporter assays showed that hypoxia-induced NFAT signaling activation is dependent on HIF-2, but not HIF-1. Furthermore, the inhibition or silencing of HIF-2, but not HIF-1, reduced the hypoxia-mediated NFATc2 nuclear translocation. Our studies suggest that hypoxia induces the proliferation of human pulmonary fibroblasts through NFAT signaling and HIF-2.
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Affiliation(s)
- Lakmini Kumari Senavirathna
- Oklahoma Center for Respiratory and Infectious Diseases, Oklahoma State University, Stillwater, OK, 74078, USA.,Department of Physiological Sciences, Lundberg-Kienlen Lung Biology and Toxicology Laboratory, Oklahoma State University, Stillwater, OK, 74078, USA
| | - Chaoqun Huang
- Oklahoma Center for Respiratory and Infectious Diseases, Oklahoma State University, Stillwater, OK, 74078, USA.,Department of Physiological Sciences, Lundberg-Kienlen Lung Biology and Toxicology Laboratory, Oklahoma State University, Stillwater, OK, 74078, USA
| | - Xiaoyun Yang
- Oklahoma Center for Respiratory and Infectious Diseases, Oklahoma State University, Stillwater, OK, 74078, USA.,Department of Physiological Sciences, Lundberg-Kienlen Lung Biology and Toxicology Laboratory, Oklahoma State University, Stillwater, OK, 74078, USA
| | - Maria Cristina Munteanu
- Oklahoma Center for Respiratory and Infectious Diseases, Oklahoma State University, Stillwater, OK, 74078, USA.,Department of Physiological Sciences, Lundberg-Kienlen Lung Biology and Toxicology Laboratory, Oklahoma State University, Stillwater, OK, 74078, USA
| | - Roshini Sathiaseelan
- Oklahoma Center for Respiratory and Infectious Diseases, Oklahoma State University, Stillwater, OK, 74078, USA.,Department of Physiological Sciences, Lundberg-Kienlen Lung Biology and Toxicology Laboratory, Oklahoma State University, Stillwater, OK, 74078, USA
| | - Dao Xu
- Oklahoma Center for Respiratory and Infectious Diseases, Oklahoma State University, Stillwater, OK, 74078, USA.,Department of Physiological Sciences, Lundberg-Kienlen Lung Biology and Toxicology Laboratory, Oklahoma State University, Stillwater, OK, 74078, USA
| | - Craig A Henke
- Department of Medicine, Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, University of Minnesota, Minneapolis, Minnesota, USA
| | - Lin Liu
- Oklahoma Center for Respiratory and Infectious Diseases, Oklahoma State University, Stillwater, OK, 74078, USA. .,Department of Physiological Sciences, Lundberg-Kienlen Lung Biology and Toxicology Laboratory, Oklahoma State University, Stillwater, OK, 74078, USA.
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Przybylska D, Janiszewska D, Goździk A, Bielak-Zmijewska A, Sunderland P, Sikora E, Mosieniak G. NOX4 downregulation leads to senescence of human vascular smooth muscle cells. Oncotarget 2018; 7:66429-66443. [PMID: 27655718 PMCID: PMC5341811 DOI: 10.18632/oncotarget.12079] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 09/12/2016] [Indexed: 11/25/2022] Open
Abstract
Senescence is a stress response characterized by an irreversible growth arrest and alterations in certain cell functions. It is believed that both double-strand DNA breaks (DSB) and increased ROS level are the main culprit of senescence. Excessive ROS production is also particularly important in the development of a number of cardiovascular disorders. In this context the involvement of professional ROS-producing enzymes, NADPH oxidases (NOX), was postulated. In contrary to the common knowledge, we have shown that not only increased ROS production but also diminished ROS level could be involved in the induction of senescence. Accordingly, our studies revealed that stress-induced premature senescence (SIPS) of vascular smooth muscle cells (VSMCs) induced by doxorubicin or H2O2, correlates with increased level of DSB and ROS. On the other hand, both SIPS and replicative senescence were accompanied by diminished expression of NOX4. Moreover, inhibition of NOX activity or decrease of NOX4 expression led to permanent growth arrest of VSMCs and secretion of interleukins and VEGF. Interestingly, cells undergoing senescence due to NOX4 depletion neither acquired DSB nor activated DNA damage response. Instead, transient induction of the p27, upregulation of HIF-1alpha, decreased expression of cyclin D1 and hypophosphorylated Rb was observed. Our results showed that lowering the level of ROS-producing enzyme - NOX4 oxidase below physiological level leads to cellular senescence of VSMCs which is correlated with secretion of pro-inflammatory cytokines. Thus the use of specific NOX4 inhibitors for pharmacotherapy of vascular diseases should be carefully considered.
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Affiliation(s)
- Dorota Przybylska
- Laboratory of Molecular Bases of Aging, Department of Biochemistry, Nencki Institute of Experimental Biology of Polish Academy of Sciences, Warsaw, Poland
| | - Dorota Janiszewska
- Laboratory of Molecular Bases of Aging, Department of Biochemistry, Nencki Institute of Experimental Biology of Polish Academy of Sciences, Warsaw, Poland
| | - Aleksandra Goździk
- Laboratory of Molecular Bases of Aging, Department of Biochemistry, Nencki Institute of Experimental Biology of Polish Academy of Sciences, Warsaw, Poland
| | - Anna Bielak-Zmijewska
- Laboratory of Molecular Bases of Aging, Department of Biochemistry, Nencki Institute of Experimental Biology of Polish Academy of Sciences, Warsaw, Poland
| | - Piotr Sunderland
- Laboratory of Molecular Bases of Aging, Department of Biochemistry, Nencki Institute of Experimental Biology of Polish Academy of Sciences, Warsaw, Poland
| | - Ewa Sikora
- Laboratory of Molecular Bases of Aging, Department of Biochemistry, Nencki Institute of Experimental Biology of Polish Academy of Sciences, Warsaw, Poland
| | - Grażyna Mosieniak
- Laboratory of Molecular Bases of Aging, Department of Biochemistry, Nencki Institute of Experimental Biology of Polish Academy of Sciences, Warsaw, Poland
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MiRNA-646-mediated reciprocal repression between HIF-1α and MIIP contributes to tumorigenesis of pancreatic cancer. Oncogene 2018; 37:1743-1758. [PMID: 29343850 DOI: 10.1038/s41388-017-0082-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 10/23/2017] [Accepted: 11/24/2017] [Indexed: 12/19/2022]
Abstract
Migration and invasion inhibitory protein (MIIP) is recently identified as an inhibitor in tumor development. However, the regulatory mechanism and biological contributions of MIIP in pancreatic cancer (PC) have been not elucidated. In this study, we demonstrated a negative feedback of MIIP and hypoxia-induced factor-1α (HIF-1α), which was mediated by a hypoxia-induced microRNA. Compared with paracarcinoma tissues, MIIP was downregulated in PC tissues. Overexpression of MIIP significantly impeded the proliferation and invasion of PC cells both in vitro and in mouse xenograft models. We further verified MIIP was downregulated under hypoxia in a HIF-1α-mediated manner. Interestingly, although MIIP promoter containing two putative hypoxia response elements (HREs), the chromatin immunoprecipitation (ChIP) and luciferase reporter assays did not support an active interaction between HIF-1α and MIIP promoter. Meanwhile, microRNA array revealed a hypoxia-induced microRNA, miR-646, impaired stability of MIIP mRNA and consequently inhibited its expression by targeting the coding sequence (CDS). Coincidently, knockdown of miR-646 significantly repressed proliferation and invasion ability of PC cells both in vitro and in vivo by upregulating MIIP expression. Besides, ChIP and luciferase reporter assays further validated that HIF-1α activated transcription of miR-646 in hypoxia condition. Therefore, these results suggested HIF-1α indirectly regulated MIIP expression in post-transcriptional level through upregulating miR-646 transcription. Conversely, our results further revealed that MIIP suppressed deacetylase ability of histone deacetylase 6 (HDAC6) to promote the acetylation and degradation of HIF-1α, by which impairing HIF-1α accumulation. What is more, a specific relationship between downregulated MIIP and upregulated miR-646 expression was validated in PC samples. Moreover, the dysregulated miR-646 and MIIP expression was correlated with advanced tumor stage, lymphatic invasion, metastasis and shorter overall survival in PC patients. Together, our results highlight that the reciprocal loop of HIF-1α/miR-646/MIIP might be implemented as an applicable target for pancreatic cancer therapy.
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Ahmed HH, El-Abhar HS, Hassanin EAK, Abdelkader NF, Shalaby MB. Ginkgo biloba L. leaf extract offers multiple mechanisms in bridling N-methylnitrosourea – mediated experimental colorectal cancer. Biomed Pharmacother 2017; 95:387-393. [DOI: 10.1016/j.biopha.2017.08.103] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 08/19/2017] [Accepted: 08/23/2017] [Indexed: 12/11/2022] Open
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23
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Ahmed HH, El-Abhar HS, Hassanin EAK, Abdelkader NF, Shalaby MB. Punica granatum suppresses colon cancer through downregulation of Wnt/β-Catenin in rat model. REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY 2017. [DOI: 10.1016/j.bjp.2017.05.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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24
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Cellular effects of the microtubule-targeting agent peloruside A in hypoxia-conditioned colorectal carcinoma cells. Biochim Biophys Acta Gen Subj 2017; 1861:1833-1843. [DOI: 10.1016/j.bbagen.2017.03.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2016] [Revised: 03/27/2017] [Accepted: 03/29/2017] [Indexed: 12/27/2022]
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25
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Wohlkoenig C, Leithner K, Olschewski A, Olschewski H, Hrzenjak A. TR3 is involved in hypoxia-induced apoptosis resistance in lung cancer cells downstream of HIF-1α. Lung Cancer 2017; 111:15-22. [PMID: 28838387 DOI: 10.1016/j.lungcan.2017.06.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 05/11/2017] [Accepted: 06/20/2017] [Indexed: 11/27/2022]
Abstract
OBJECTIVES Lung cancer is the leading cause of cancer death worldwide. Like in all solid tumors, hypoxia is common in lung cancer and contributes to apoptosis, and thus chemotherapy resistance. However, the underlying mechanisms are not entirely clear. TR3 (NR4A1, Nur77) is an orphan nuclear receptor that induces apoptosis and may mediate chemotherapy-induced apoptosis in cancer cells. MATERIALS AND METHODS We used A549, H23 and H1299 cell lines to investigate how TR3-mediated apoptosis is affected by hypoxia in non-small cell lung cancer (NSCLC) cells. Cell culture, western blot analysis, apoptosis assay, and siRNA-mediated gene silencing were performed in this study. RESULTS AND CONCLUSION The TR3 activator cytosporone B was used to investigate TR3-mediated apoptosis in NSCLC cells under normoxic and hypoxic conditions. Cytosporone B induced apoptosis in a concentration-dependent manner. Chronic moderate hypoxia induced a significant down-regulation of TR3. Accordingly, the cytosporone B effect was reduced under these conditions. Hypoxia-induced down-regulation of TR3 was mediated by hypoxia-inducible factor 1α. Our immunoblotting analysis and expression data from a public dataset suggest that TR3 is downregulated in NSCLC. In conclusion, our findings suggest that hypoxia-induced down-regulation of TR3 might play an important role for hypoxia-induced apoptosis resistance in NSCLC.
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Affiliation(s)
- Christoph Wohlkoenig
- Division of Pulmonology, Department of Internal Medicine, Medical University of Graz, Graz, Austria.
| | - Katharina Leithner
- Division of Pulmonology, Department of Internal Medicine, Medical University of Graz, Graz, Austria.
| | - Andrea Olschewski
- Institute of Physiology, Medical University of Graz, Graz, Austria; Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria.
| | - Horst Olschewski
- Division of Pulmonology, Department of Internal Medicine, Medical University of Graz, Graz, Austria.
| | - Andelko Hrzenjak
- Division of Pulmonology, Department of Internal Medicine, Medical University of Graz, Graz, Austria; Institute of Physiology, Medical University of Graz, Graz, Austria.
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Canales J, Valenzuela M, Bravo J, Cerda-Opazo P, Jorquera C, Toledo H, Bravo D, Quest AFG. Helicobacter pylori Induced Phosphatidylinositol-3-OH Kinase/mTOR Activation Increases Hypoxia Inducible Factor-1α to Promote Loss of Cyclin D1 and G0/G1 Cell Cycle Arrest in Human Gastric Cells. Front Cell Infect Microbiol 2017; 7:92. [PMID: 28401064 PMCID: PMC5368181 DOI: 10.3389/fcimb.2017.00092] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 03/08/2017] [Indexed: 12/11/2022] Open
Abstract
Helicobacter pylori (H. pylori) is a human gastric pathogen that has been linked to the development of several gastric pathologies, such as gastritis, peptic ulcer, and gastric cancer. In the gastric epithelium, the bacterium modifies many signaling pathways, resulting in contradictory responses that favor both proliferation and apoptosis. Consistent with such observations, H. pylori activates routes associated with cell cycle progression and cell cycle arrest. H. pylori infection also induces the hypoxia-induced factor HIF-1α, a transcription factor known to promote expression of genes that permit metabolic adaptation to the hypoxic environment in tumors and angiogenesis. Recently, however, also roles for HIF-1α in the repair of damaged DNA and inhibition of gene expression were described. Here, we investigated signaling pathways induced by H. pylori in gastric cells that favor HIF-1α expression and the consequences thereof in infected cells. Our results revealed that H. pylori promoted PI3K/mTOR-dependent HIF-1α induction, HIF-1α translocation to the nucleus, and activity as a transcription factor as evidenced using a reporter assay. Surprisingly, however, transcription of known HIF-1α effector genes evaluated by qPCR analysis, revealed either no change (LDHA and GAPDH), statistically insignificant increases SLC2A1 (GLUT-1) or greatly enhance transcription (VEGFA), but in an HIF-1α-independent manner, as quantified by PCR analysis in cells with shRNA-mediated silencing of HIF-1α. Instead, HIF-1α knockdown facilitated G1/S progression and increased Cyclin D1 protein half-life, via a post-translational pathway. Taken together, these findings link H. pylori-induced PI3K-mTOR activation to HIF-1α induced G0/G1 cell cycle arrest by a Cyclin D1-dependent mechanism. Thus, HIF-1α is identified here as a mediator between survival and cell cycle arrest signaling activated by H. pylori infection.
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Affiliation(s)
- Jimena Canales
- Laboratorio de Comunicaciones Celulares, Facultad De Medicina, Centro de Estudios Moleculares De la Célula, Centro de Estudios Avanzados en Enfermedades Crónicas, Programa De Biología Celular y Molecular, Instituto de Ciencias Biomédicas, Universidad de Chile Santiago, Chile
| | - Manuel Valenzuela
- Laboratorio de Comunicaciones Celulares, Facultad De Medicina, Centro de Estudios Moleculares De la Célula, Centro de Estudios Avanzados en Enfermedades Crónicas, Programa De Biología Celular y Molecular, Instituto de Ciencias Biomédicas, Universidad de ChileSantiago, Chile; Facultad de Ciencias de la Salud, Universidad Central de ChileSantiago, Chile
| | - Jimena Bravo
- Laboratorio de Comunicaciones Celulares, Facultad De Medicina, Centro de Estudios Moleculares De la Célula, Centro de Estudios Avanzados en Enfermedades Crónicas, Programa De Biología Celular y Molecular, Instituto de Ciencias Biomédicas, Universidad de Chile Santiago, Chile
| | - Paulina Cerda-Opazo
- Laboratorio de Comunicaciones Celulares, Facultad De Medicina, Centro de Estudios Moleculares De la Célula, Centro de Estudios Avanzados en Enfermedades Crónicas, Programa De Biología Celular y Molecular, Instituto de Ciencias Biomédicas, Universidad de Chile Santiago, Chile
| | - Carla Jorquera
- Laboratorio de Comunicaciones Celulares, Facultad De Medicina, Centro de Estudios Moleculares De la Célula, Centro de Estudios Avanzados en Enfermedades Crónicas, Programa De Biología Celular y Molecular, Instituto de Ciencias Biomédicas, Universidad de Chile Santiago, Chile
| | - Héctor Toledo
- Laboratorio de Microbiología Molecular, Facultad de Medicina, Programa de Biología Celular y Molecular, Instituto de Ciencias Biomédicas, Universidad de Chile Santiago, Chile
| | - Denisse Bravo
- Laboratorio de Microbiología Oral, Departamento de Patología y Medicina Oral, Facultad De Odontología, Universidad de Chile Santiago, Chile
| | - Andrew F G Quest
- Laboratorio de Comunicaciones Celulares, Facultad De Medicina, Centro de Estudios Moleculares De la Célula, Centro de Estudios Avanzados en Enfermedades Crónicas, Programa De Biología Celular y Molecular, Instituto de Ciencias Biomédicas, Universidad de Chile Santiago, Chile
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Ghasemi A, Fallah S, Ansari M. MicroRNA-149 is epigenetically silenced tumor-suppressive microRNA, involved in cell proliferation and downregulation of AKT1 and cyclin D1 in human glioblastoma multiforme. Biochem Cell Biol 2016; 94:569-576. [DOI: 10.1139/bcb-2015-0064] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Aberrant DNA methylation has been shown to inactivate tumor suppressor genes during carcinogenesis. MicroRNA-149 (miR-149) was recently demonstrated to function as a tumor suppressor gene in glioblastoma multiforme (GBM). However, the potential linkage of miR-149 levels and the underlying epigenetic regulatory mechanism in human GBM has not been studied. We used quantitative real-time polymerase chain reaction to investigate the levels of miR-149 in GBM tissues, their matched adjacent normal tissues, and glioblastoma U87MG cell line. Using bisulfite genomic sequencing technology, DNA methylation status of upstream region of miR-149 was evaluated in study population groups and the U87MG cell line. After treatment of cells with 5-aza-2′-deoxycitidine (5-aza-dC), the DNA methylation status, gene expression, and target protein levels of miR-149 were investigated. Our studies revealed that methylation and expression levels of miR-149 were significantly increased and decreased, respectively in GBM patients relative to the adjacent normal tissues (P < 0.01). MiR-149 suppressed the expression of AKT1 and cyclin D1 and reduced the proliferative activities of the U87MG cell line. Treatment of U87MG cells with 5-aza-dC reversed the hypermethylation status of miR-149, enhanced the expression of its gene, and decreased target mRNA and proteins levels (P < 0.01). These findings suggest that the methylation mechanism is associated with decreased expression levels of miR-149, which may in turn lead to the increased levels of its oncogenic target proteins.
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Affiliation(s)
- Asghar Ghasemi
- Department of Clinical Biochemistry, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Soudabeh Fallah
- Department of Clinical Biochemistry, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
- Research Center of Pediatric Infection Disease, Hazrat Rasol Akram Hospital of Iran University of Medical Sciences
| | - Mohammad Ansari
- Department of Clinical Biochemistry, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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28
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Xiong Z, Guo M, Yu Y, Zhang FF, Ge MK, Chen GQ, Shen SM. Downregulation of AIF by HIF-1 contributes to hypoxia-induced epithelial–mesenchymal transition of colon cancer. Carcinogenesis 2016; 37:1079-1088. [DOI: 10.1093/carcin/bgw089] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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Cruz RDL, Guerrero P, Spill F, Alarcón T. Stochastic multi-scale models of competition within heterogeneous cellular populations: Simulation methods and mean-field analysis. J Theor Biol 2016; 407:161-183. [PMID: 27457092 PMCID: PMC5016039 DOI: 10.1016/j.jtbi.2016.07.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Revised: 07/07/2016] [Accepted: 07/20/2016] [Indexed: 01/21/2023]
Abstract
We propose a modelling framework to analyse the stochastic behaviour of heterogeneous, multi-scale cellular populations. We illustrate our methodology with a particular example in which we study a population with an oxygen-regulated proliferation rate. Our formulation is based on an age-dependent stochastic process. Cells within the population are characterised by their age (i.e. time elapsed since they were born). The age-dependent (oxygen-regulated) birth rate is given by a stochastic model of oxygen-dependent cell cycle progression. Once the birth rate is determined, we formulate an age-dependent birth-and-death process, which dictates the time evolution of the cell population. The population is under a feedback loop which controls its steady state size (carrying capacity): cells consume oxygen which in turn fuels cell proliferation. We show that our stochastic model of cell cycle progression allows for heterogeneity within the cell population induced by stochastic effects. Such heterogeneous behaviour is reflected in variations in the proliferation rate. Within this set-up, we have established three main results. First, we have shown that the age to the G1/S transition, which essentially determines the birth rate, exhibits a remarkably simple scaling behaviour. Besides the fact that this simple behaviour emerges from a rather complex model, this allows for a huge simplification of our numerical methodology. A further result is the observation that heterogeneous populations undergo an internal process of quasi-neutral competition. Finally, we investigated the effects of cell-cycle-phase dependent therapies (such as radiation therapy) on heterogeneous populations. In particular, we have studied the case in which the population contains a quiescent sub-population. Our mean-field analysis and numerical simulations confirm that, if the survival fraction of the therapy is too high, rescue of the quiescent population occurs. This gives rise to emergence of resistance to therapy since the rescued population is less sensitive to therapy.
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Affiliation(s)
- Roberto de la Cruz
- Centre de Recerca Matemàtica, Edifici C, Campus de Bellaterra, 08193 Bellaterra, Barcelona, Spain; Departament de Matemàtiques, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Pilar Guerrero
- Department of Mathematics, University College London, Gower Street, London WC1E 6BT, UK
| | - Fabian Spill
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA; Department of Biomedical Engineering, Boston University, 44 Cummington Street, Boston, MA 02215, USA
| | - Tomás Alarcón
- Centre de Recerca Matemàtica, Edifici C, Campus de Bellaterra, 08193 Bellaterra, Barcelona, Spain; Departament de Matemàtiques, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain; ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Spain; Barcelona Graduate School of Mathematics (BGSMath), Barcelona, Spain
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30
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Zhu S, He C, Deng S, Li X, Cui S, Zeng Z, Liu M, Zhao S, Chen J, Jin Y, Chen H, Deng S, Liu Y, Wang C, Zhao G. MiR-548an, Transcriptionally Downregulated by HIF1α/HDAC1, Suppresses Tumorigenesis of Pancreatic Cancer by Targeting Vimentin Expression. Mol Cancer Ther 2016; 15:2209-19. [PMID: 27353169 DOI: 10.1158/1535-7163.mct-15-0877] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 06/21/2016] [Indexed: 12/20/2022]
Abstract
Hypoxic microenvironments contribute to the tumorigenesis of numerous cancers by regulating the expression of a subset of miRNAs called "hypoxiamiRs." However, the function and mechanism of these deregulated miRNAs in hypoxic microenvironments within pancreatic cancers remain undefined. This study demonstrates that miR-548an is significantly downregulated in pancreatic cancer tissues and correlates with increased tumor size, advanced TNM stage, distant metastasis, and poor prognosis. Moreover, the overexpression of miR-548an significantly inhibited the proliferation and invasion of pancreatic cancer cells in vitro and in vivo We further revealed that hypoxia-induced factor-1α (HIF-1α) induces the downregulation of miR-548an in pancreatic cancer cells during hypoxia. Our co-IP and ChIP assays revealed that HIF-1α and histone deacetylase 1 (HDAC1) form a complex and bind to the hypoxia response elements (HRE) on the miR-548an promoter. In addition, inhibition of HDAC1 with trichostatin A antagonizes the suppression of miR-548 by hypoxia. Our dual luciferase assay validated that miR-548an directly binds to the 3' untranslated region of vimentin mRNA. The downregulation of vimentin suppresses the proliferation and invasion of pancreatic cancer cells in vitro and in vivo In addition, vimentin was inversely correlated with miR-548an expression in pancreatic cancer samples. In conclusion, our findings suggest that the HIF-1α-HDAC1 complex transcriptionally inhibits miR-548an expression during hypoxia, resulting in the upregulation of vimentin that facilitates the pancreatic tumorigenesis. Mol Cancer Ther; 15(9); 2209-19. ©2016 AACR.
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Affiliation(s)
- Shuai Zhu
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chi He
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shijiang Deng
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiang Li
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shipeng Cui
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhu Zeng
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Mingliang Liu
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shufeng Zhao
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jingyuan Chen
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yan Jin
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hengyu Chen
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shichang Deng
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yang Liu
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chunyou Wang
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Gang Zhao
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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Ding J, Wen W, Xiang D, Yin P, Liu Y, Liu C, He G, Cheng Z, Yin J, Sheng C, Zhang W, Nan F, Ye W, Zhang X, Wang H. ψ-Bufarenogin, a novel anti-tumor compound, suppresses liver cancer growth by inhibiting receptor tyrosine kinase-mediated signaling. Oncotarget 2016; 6:11627-39. [PMID: 25890498 PMCID: PMC4484481 DOI: 10.18632/oncotarget.3435] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 02/23/2015] [Indexed: 12/27/2022] Open
Abstract
Resistance of hepatocellular carcinoma (HCC) to existing chemotherapeutic agents largely contributes to the poor prognosis of patients, and discovery of novel anti-HCC drug is in an urgent need. Herein we report ψ-Bufarenogin, a novel active compound that we isolated from the extract of toad skin, exhibited potent therapeutic effect in xenografted human hepatoma without notable side effects. In vitro, ψ-Bufarenogin suppressed HCC cells proliferation through impeding cell cycle progression, and it facilitated cell apoptosis by downregulating Mcl-1 expression. Moreover, ψ-Bufarenogin decreased the number of hepatoma stem cells through Sox2 depression and exhibited synergistic effect with conventional chemotherapeutics. Mechanistic study revealed that ψ-Bufarenogin impaired the activation of MEK/ERK pathway, which is essential in the proliferation of hepatoma cells. ψ-Bufarenogin notably suppressed PI3-K/Akt cascade, which was required in ψ-Bufarenogin-mediated reduction of Mcl-1 and Sox2. ψ-Bufarenogin inhibited the auto-phosphorylation and activation of epithelial growth factor receptor (EGFR) and hepatocyte growth factor receptor (c-Met), thereafter suppressed their primary downstream cascades Raf/MEK/ERK and PI3-K/Akt signaling. Taken together, ψ-Bufarenogin suppressed HCC growth via inhibiting, at least partially, receptor tyrosine kinases-regulated signaling, suggesting that ψ-Bufarenogin could be a novel lead compound for anti-HCC drug.
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Affiliation(s)
- Jin Ding
- The International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China.,National Center for Liver Cancer, Shanghai, China
| | - Wen Wen
- The International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China.,National Center for Liver Cancer, Shanghai, China
| | - Daimin Xiang
- The International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China.,National Center for Liver Cancer, Shanghai, China
| | - Peipei Yin
- The International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China.,Department of Pharmacology, Shanghai Institute of Pharmaceutical Industry, Shanghai, China
| | - Yanfang Liu
- Key Lab of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Chang Liu
- Department of Pharmacology, Shanghai Institute of Pharmaceutical Industry, Shanghai, China
| | - Guoping He
- The International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - Zhuo Cheng
- The International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - Jianpeng Yin
- National Center for Drug Screen, Shanghai, China
| | - Chunquan Sheng
- College of Pharmacy, Second Military Medical University, Shanghai, China
| | - Wen Zhang
- College of Pharmacy, Second Military Medical University, Shanghai, China
| | - Fajun Nan
- National Center for Drug Screen, Shanghai, China
| | - Wencai Ye
- College of Pharmacy, Jinan University, Guangzhou, China
| | - Xiuli Zhang
- Key Lab of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Hongyang Wang
- The International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China.,National Center for Liver Cancer, Shanghai, China
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Ishii A, Kimura T, Sadahiro H, Kawano H, Takubo K, Suzuki M, Ikeda E. Histological Characterization of the Tumorigenic "Peri-Necrotic Niche" Harboring Quiescent Stem-Like Tumor Cells in Glioblastoma. PLoS One 2016; 11:e0147366. [PMID: 26799577 PMCID: PMC4723051 DOI: 10.1371/journal.pone.0147366] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2015] [Accepted: 01/04/2016] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Characterization of the niches for stem-like tumor cells is important to understand and control the behavior of glioblastomas. Cell-cycle quiescence might be a common mechanism underlying the long-term maintenance of stem-cell function in normal and neoplastic stem cells, and our previous study demonstrated that quiescence induced by hypoxia-inducible factor (HIF)-1α is associated with a high long-term repopulation capacity of hematopoietic stem cells. Based on this, we examined human astrocytoma tissues for HIF-1α-regulated quiescent stem-like tumor cells as a candidate for long-term tumorigenic cells and characterized their niche histologically. METHODS Multi-color immunohistochemistry was used to visualize HIF-1α-expressing (HIF-1α+) quiescent stem-like tumor cells and their niche in astrocytoma (WHO grade II-IV) tissues. This niche was modeled using spheroids of cultured glioblastoma cells and its contribution to tumorigenicity was evaluated by sphere formation assay. RESULTS A small subpopulation of HIF-1α+ quiescent stem-like tumor cells was found in glioblastomas but not in lower-grade astrocytomas. These cells were concentrated in the zone between large ischemic necroses and blood vessels and were closer to the necrotic tissues than to the blood vessels, which suggested that a moderately hypoxic microenvironment is their niche. We successfully modeled this niche containing cells of HIF-1α+ quiescent stem-like phenotype by incubating glioblastoma cell spheroids under an appropriately hypoxic condition, and the emergence of HIF-1α+ quiescent stem-like cells was shown to be associated with an enhanced sphere-forming activity. CONCLUSIONS These data suggest that the "peri-necrotic niche" harboring HIF-1α+ quiescent stem-like cells confers a higher tumorigenic potential on glioblastoma cells and therefore may be a therapeutic target to control the behavior of glioblastomas.
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Affiliation(s)
- Aya Ishii
- Department of Pathology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Tokuhiro Kimura
- Department of Pathology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
- * E-mail: (TK); (EI)
| | - Hirokazu Sadahiro
- Department of Neurosurgery, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Hiroo Kawano
- Department of Basic Laboratory Sciences, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Keiyo Takubo
- Research Institute National Center for Global Health and Medicine, Shinjuku, Tokyo, Japan
| | - Michiyasu Suzuki
- Department of Neurosurgery, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Eiji Ikeda
- Department of Pathology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
- * E-mail: (TK); (EI)
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33
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Chen J, Bai M, Ning C, Xie B, Zhang J, Liao H, Xiong J, Tao X, Yan D, Xi X, Chen X, Yu Y, Bast RC, Zhang Z, Feng Y, Zheng W. Gankyrin facilitates follicle-stimulating hormone-driven ovarian cancer cell proliferation through the PI3K/AKT/HIF-1α/cyclin D1 pathway. Oncogene 2015; 35:2506-17. [PMID: 26364616 DOI: 10.1038/onc.2015.316] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2015] [Revised: 06/04/2015] [Accepted: 07/21/2015] [Indexed: 12/20/2022]
Abstract
Gankyrin is a regulatory subunit of the 26kD proteasome complex. As a novel oncoprotein, gankyrin is expressed aberrantly in cancers from several different sites and has been shown to contribute to oncogenesis in endometrial and cervical carcinomas. Neither gankyrin's contribution to the development of epithelial ovarian cancer nor its interaction with follicle-stimulating hormone (FSH)-driven proliferation in ovarian cancer has been studied. Here we have found that gankyrin is overexpressed in ovarian cancers compared with benign ovarian cystadenomas and that gankyrin regulates FSH upregulation of cyclin D1. Importantly, gankyrin regulates PI3K/AKT signaling by downregulating PTEN. Prolonged AKT activation by FSH stimulation of the FSH receptor (FSHR) promotes gankyrin expression, which, in turn, enhances AKT activation by inhibiting PTEN. Overexpression of gankyrin decreases hypoxia inducible factor-1α (HIF-1α) protein levels, but has little effect on HIF-1α mRNA levels, which could be attributed to gankyrin mediating HIF-1α protein stability via the ubiquitin-proteasome pathway. Reduction in HIF-1α protein stability led to attenuation of the binding with cyclin D1 promoter, resulted in abolishment of the negative regulation of cyclin D1 by HIF-1α, which promotes proliferation of ovarian cancer cells. Our results document that gankyrin regulates HIF-1α protein stability and cyclin D1 expression, ultimately mediating FSH-driven ovarian cancer cell proliferation.
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Affiliation(s)
- J Chen
- Department of Obstetrics and Gynecology, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - M Bai
- Department of Obstetrics and Gynecology, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - C Ning
- Department of Gynecology, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China
| | - B Xie
- Department of Obstetrics and Gynecology, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - J Zhang
- Department of Obstetrics and Gynecology, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - H Liao
- Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
| | - J Xiong
- Department of Neuropathology, Huashan Hospital of Fudan University, Shanghai, China
| | - X Tao
- Department of Pathology, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China
| | - D Yan
- Department of Obstetrics and Gynecology, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - X Xi
- Department of Obstetrics and Gynecology, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - X Chen
- Department of Gynecology, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China
| | - Y Yu
- Department of Gynecology, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China.,Department of Experimental Therapeutics, MD Anderson Cancer Center, The University of Texas, Houston, TX, USA
| | - R C Bast
- Department of Experimental Therapeutics, MD Anderson Cancer Center, The University of Texas, Houston, TX, USA
| | - Z Zhang
- Department of Obstetrics and Gynecology, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Y Feng
- Department of Obstetrics and Gynecology, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - W Zheng
- Department of Pathology, University of Arizona College of Medicine, Tucson, AZ, USA.,Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA
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Abstract
Oxygen is the basic molecule which supports life and it truly is "god's gift to life." Despite its immense importance, research on "oxygen biology" has never received the light of the day and has been limited to physiological and biochemical studies. It seems that in modern day biology, oxygen research is summarized in one word "hypoxia." Scientists have focused on hypoxia-induced transcriptomics and molecular-cellular alterations exclusively in disease models. Interestingly, the potential of oxygen to control the basic principles of biology like homeostatic maintenance, transcription, replication, and protein folding among many others, at the molecular level, has been completely ignored. Here, we present a perspective on the crucial role played by oxygen in regulation of basic biological phenomena. Our conclusion highlights the importance of establishing novel research areas like oxygen biology, as there is great potential in this field for basic science discoveries and clinical benefits to the society.
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Xu G, Ji W, Su Y, Xu Y, Yan Y, Shen S, Li X, Sun B, Qian H, Chen L, Fu X, Wu M, Su C. Sulfatase 1 (hSulf-1) reverses basic fibroblast growth factor-stimulated signaling and inhibits growth of hepatocellular carcinoma in animal model. Oncotarget 2015; 5:5029-39. [PMID: 24970807 PMCID: PMC4148119 DOI: 10.18632/oncotarget.2078] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The human sulfatase 1 (hSulf-1) gene encodes an endosulfatase that functions to inhibit the heparin-binding growth factor signaling, including the basic fibroblast growth factor (bFGF)-mediated pathway, by desulfating the cell surface heparan sulfate proteoglycans (HSPGs). bFGF could stimulate cell cycle progression and inhibit cell apoptosis, this biological effect can be reversed by hSulf-1. However, molecular mechanisms have not been fully reported. In the current study, by reactivation of hSulf-1 expression and function in the hSulf-1-negative hepatocellular carcinoma (HCC) cell lines and HCC xenograft tumors, we found that hSulf-1 blocked the bFGF effect on the promotion of cell cycle and inhibition of apoptosis. The bFGF-stimulated activation of protein kinase B (AKT) and extracellular signal-regulated kinase (ERK) pathways was suppressed by hSulf-1, which led to a decreased expression of the target genes Cyclin D1 and Survivin, then finally induced cell cycle arrest and apoptosis in HCC cells. Our data suggested that hSulf-1 may be a suitable target for cancer therapy.
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Affiliation(s)
- Gaoya Xu
- Department of Molecular Oncology, Eastern Hepatobiliary Surgical Hospital & National Center of Liver Cancer, The Second Military Medical University, Shanghai, China. Department of Pathogen Biology, School of Biology & Basic Medical Sciences, Soochow University, Suzhou, China
| | - Weidan Ji
- Department of Molecular Oncology, Eastern Hepatobiliary Surgical Hospital & National Center of Liver Cancer, The Second Military Medical University, Shanghai, China
| | - Yinghan Su
- Department of Biology, Xi'an Jiaotong-Liverpool University, Suzhou, China
| | - Yang Xu
- Department of Molecular Oncology, Eastern Hepatobiliary Surgical Hospital & National Center of Liver Cancer, The Second Military Medical University, Shanghai, China
| | - Yan Yan
- Department of Molecular Oncology, Eastern Hepatobiliary Surgical Hospital & National Center of Liver Cancer, The Second Military Medical University, Shanghai, China
| | - Shuwen Shen
- Department of Molecular Oncology, Eastern Hepatobiliary Surgical Hospital & National Center of Liver Cancer, The Second Military Medical University, Shanghai, China
| | - Xiaoya Li
- Department of Molecular Oncology, Eastern Hepatobiliary Surgical Hospital & National Center of Liver Cancer, The Second Military Medical University, Shanghai, China
| | - Bin Sun
- Department of Molecular Oncology, Eastern Hepatobiliary Surgical Hospital & National Center of Liver Cancer, The Second Military Medical University, Shanghai, China
| | - Haihua Qian
- Department of Molecular Oncology, Eastern Hepatobiliary Surgical Hospital & National Center of Liver Cancer, The Second Military Medical University, Shanghai, China
| | - Lei Chen
- Department of Molecular Oncology, Eastern Hepatobiliary Surgical Hospital & National Center of Liver Cancer, The Second Military Medical University, Shanghai, China
| | - Xiaohui Fu
- Department of Molecular Oncology, Eastern Hepatobiliary Surgical Hospital & National Center of Liver Cancer, The Second Military Medical University, Shanghai, China
| | - Mengchao Wu
- Department of Molecular Oncology, Eastern Hepatobiliary Surgical Hospital & National Center of Liver Cancer, The Second Military Medical University, Shanghai, China
| | - Changqing Su
- Department of Molecular Oncology, Eastern Hepatobiliary Surgical Hospital & National Center of Liver Cancer, The Second Military Medical University, Shanghai, China. Department of Pathogen Biology, School of Biology & Basic Medical Sciences, Soochow University, Suzhou, China
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Das V, Štěpánková J, Hajdúch M, Miller JH. Role of tumor hypoxia in acquisition of resistance to microtubule-stabilizing drugs. Biochim Biophys Acta Rev Cancer 2015; 1855:172-82. [DOI: 10.1016/j.bbcan.2015.02.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 01/12/2015] [Accepted: 02/01/2015] [Indexed: 12/19/2022]
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37
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Coelho C, Souza ACO, Derengowski LDS, de Leon-Rodriguez C, Wang B, Leon-Rivera R, Bocca AL, Gonçalves T, Casadevall A. Macrophage mitochondrial and stress response to ingestion of Cryptococcus neoformans. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2015; 194:2345-57. [PMID: 25646306 PMCID: PMC4340727 DOI: 10.4049/jimmunol.1402350] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Human infection with Cryptococcus neoformans, a common fungal pathogen, follows deposition of yeast spores in the lung alveoli. The subsequent host-pathogen interaction can result in eradication, latency, or extrapulmonary dissemination. Successful control of C. neoformans infection is dependent on host macrophages, but macrophages display little ability to kill C. neoformans in vitro. Recently, we reported that ingestion of C. neoformans by mouse macrophages induces early cell cycle progression followed by mitotic arrest, an event that almost certainly reflects host cell damage. The goal of the present work was to understand macrophage pathways affected by C. neoformans toxicity. Infection of macrophages by C. neoformans was associated with alterations in protein translation rate and activation of several stress pathways, such as hypoxia-inducing factor-1-α, receptor-interacting protein 1, and apoptosis-inducing factor. Concomitantly we observed mitochondrial depolarization in infected macrophages, an observation that was replicated in vivo. We also observed differences in the stress pathways activated, depending on macrophage cell type, consistent with the nonspecific nature of C. neoformans virulence known to infect phylogenetically distant hosts. Our results indicate that C. neoformans infection impairs multiple host cellular functions and undermines the health of these critical phagocytic cells, which can potentially interfere with their ability to clear this fungal pathogen.
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Affiliation(s)
- Carolina Coelho
- Department of Microbiology and Immunology, Albert Einstein College of Medicine of Yeshiva University, Bronx, NY 10461; Centre for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal; Faculty of Medicine, University of Coimbra, 3004-504 Coimbra, Portugal
| | - Ana Camila Oliveira Souza
- Cell Biology Department, Biology Science Institute, University of Brasilia, Brasilia CEP 70910-900, Brazil
| | | | - Carlos de Leon-Rodriguez
- Department of Microbiology and Immunology, Albert Einstein College of Medicine of Yeshiva University, Bronx, NY 10461
| | - Bo Wang
- Department of Microbiology and Immunology, Albert Einstein College of Medicine of Yeshiva University, Bronx, NY 10461; MD Program, Albert Einstein College of Medicine of Yeshiva University, Bronx, NY 10461
| | - Rosiris Leon-Rivera
- Department of Biology, University of Puerto Rico, Río Piedras Campus, San Juan, Puerto Rico 00931; and Undergraduate Research Program, Albert Einstein College of Medicine of Yeshiva University, Bronx, NY 10461
| | - Anamelia Lorenzetti Bocca
- Cell Biology Department, Biology Science Institute, University of Brasilia, Brasilia CEP 70910-900, Brazil
| | - Teresa Gonçalves
- Centre for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal; Faculty of Medicine, University of Coimbra, 3004-504 Coimbra, Portugal
| | - Arturo Casadevall
- Department of Microbiology and Immunology, Albert Einstein College of Medicine of Yeshiva University, Bronx, NY 10461;
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38
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Kato H, Izumi K, Uenoyama A, Shiomi A, Kuo S, Feinberg SE. Hypoxia induces an undifferentiated phenotype of oral keratinocytes in vitro. Cells Tissues Organs 2015; 199:393-404. [PMID: 25720390 DOI: 10.1159/000371342] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/02/2014] [Indexed: 12/16/2022] Open
Abstract
The aim of this study was to determine the effects of hypoxia on the proliferating potential and phenotype of primary human oral keratinocytes cultured at ambient oxygen tension (20%) or at different levels of hypoxia (2 and 0.5% O2). The effects of oxygen tensions on cellular metabolic activity, cell proliferation, clonogenicity and proliferation heterogeneity were measured. Cell cycle profiles were analyzed by a fluorescent-activated cell sorter, and p21(WAF1/CIP1) expression in the G0/G1 phase was also concomitantly quantitated. The expression levels of cell cycle regulatory proteins were examined by immunoblotting, and the cellular senescence was assessed by senescence-associated β-galactosidase staining. Basal and suprabasal keratinocyte phenotypes were determined by the expression levels of 14-3-3σ, p75(NTR) and α6 integrin. Despite having a lower metabolism, the proliferation rate and clonogenic potential were remarkably enhanced in hypoxic cells. The significantly higher percentage of cells in the G0/G1 phase under hypoxia and the expression patterns of cell cycle regulatory proteins in hypoxic cells were indicative of a state of cell cycle arrest in hypoxia. Furthermore, a decrease in the expression of p21(WAF1/CIP1) and p16(INK4A) and fewer β-galactosidase-positive cells suggested a quiescent phenotype rather than a senescent one in hypoxic cells. Compared with normoxic cells, the differential expression patterns of keratinocyte phenotypic markers suggest that hypoxic cells that generate minimal reactive oxygen species, suppress the mammalian target of rapamycin activity and express hypoxia-inducible factor-1α favor a basal cell phenotype. Thus, regardless of the predisposition to the state of cell cycle arrest, hypoxic conditions can maintain oral keratinocytes in vitro in an undifferentiated and quiescent state.
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Affiliation(s)
- Hiroko Kato
- Department of Oral and Maxillofacial Surgery, University of Michigan, Ann Arbor, Mich., USA
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39
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Garza-Treviño EN, Said-Fernández SL, Martínez-Rodríguez HG. Understanding the colon cancer stem cells and perspectives on treatment. Cancer Cell Int 2015; 15:2. [PMID: 25685060 PMCID: PMC4328053 DOI: 10.1186/s12935-015-0163-7] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Accepted: 01/14/2015] [Indexed: 02/07/2023] Open
Abstract
An area of research that has been recently gaining attention is the relationship between cancer stem cell (CSC) biology and chemo-resistance in colon cancer patients. It is well recognized that tumor initiation, growth, invasion and metastasis are promoted by CSCs. An important reason for the widespread interest in the CSC model is that it can comprehensibly explain essential and poorly understood clinical events, such as therapy resistance, minimal residual disease, and tumor recurrence. This review discusses the recent advances in colon cancer stem cell research, the genes responsible for CSC chemoresistance, and new therapies against CSCs.
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Affiliation(s)
- Elsa N Garza-Treviño
- Laboratorio de Terapia Celular, Departamento de Bioquímica y Medicina Molecular, Facultad de Medicina, Universidad Autónoma de Nuevo León, León, Mexico
| | - Salvador L Said-Fernández
- Laboratorio de Terapia Celular, Departamento de Bioquímica y Medicina Molecular, Facultad de Medicina, Universidad Autónoma de Nuevo León, León, Mexico
| | - Herminia G Martínez-Rodríguez
- Laboratorio de Terapia Celular, Departamento de Bioquímica y Medicina Molecular, Facultad de Medicina, Universidad Autónoma de Nuevo León, León, Mexico
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40
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Glucocorticoid Receptor β Acts as a Co-activator of T-Cell Factor 4 and Enhances Glioma Cell Proliferation. Mol Neurobiol 2014; 52:1106-1118. [PMID: 25301232 DOI: 10.1007/s12035-014-8900-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Accepted: 09/16/2014] [Indexed: 12/13/2022]
Abstract
We previously reported that glucocorticoid receptor β (GRβ) regulates injury-mediated astrocyte activation and contributes to glioma pathogenesis via modulation of β-catenin/T-cell factor/lymphoid enhancer factor (TCF/LEF) transcriptional activity. The aim of this study was to characterize the mechanism behind cross-talk between GRβ and β-catenin/TCF in the progression of glioma. Here, we reported that GRβ knockdown reduced U118 and Shg44 glioma cell proliferation in vitro and in vivo. Mechanistically, we found that GRβ knockdown decreased TCF/LEF transcriptional activity without affecting β-catenin/TCF complex. Both GRα and GRβ directly interact with TCF-4, while only GRβ is required for sustaining TCF/LEF activity under hormone-free condition. GRβ bound to the N-terminus domain of TCF-4 its influence on Wnt signaling required both ligand- and DNA-binding domains (LBD and DBD, respectively). GRβ and TCF-4 interaction is enough to maintain the TCF/LEF activity at a high level in the absence of β-catenin stabilization. Taken together, these results suggest a novel cross-talk between GRβ and TCF-4 which regulates Wnt signaling and the proliferation in gliomas.
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41
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A mathematical model of HiF-1α-mediated response to hypoxia on the G1/S transition. Math Biosci 2013; 248:31-9. [PMID: 24345497 DOI: 10.1016/j.mbs.2013.11.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Revised: 11/22/2013] [Accepted: 11/25/2013] [Indexed: 12/28/2022]
Abstract
Hypoxia is known to influence the cell cycle by increasing the G1 phase duration or by inducing a quiescent state (arrest of cell proliferation). This entry into quiescence is a mean for the cell to escape from hypoxia-induced apoptosis. It is suggested that some cancer cells have gain the advantage over normal cells to easily enter into quiescence when environmental conditions, such as oxygen pressure, are unfavorable [43,1]. This ability contributes in the appearance of highly resistant and aggressive tumor phenotypes [2]. The HiF-1α factor is the key actor of the intracellular hypoxia pathway. As tumor cells undergo chronic hypoxic conditions, HiF-1α is present in higher level in cancer than in normal cells. Besides, it was shown that genetic mutations promoting overstabilization of HiF-1α are a feature of various types of cancers [7]. Finally, it is suggested that the intracellular level of HiF-1α can be related to the aggressiveness of the tumors [53,24,4,10]. However, up to now, mathematical models describing the G1/S transition under hypoxia, did not take into account the HiF-1α factor in the hypoxia pathway. Therefore, we propose a mathematical model of the G1/S transition under hypoxia, which explicitly integrates the HiF-1α pathway. The model reproduces the slowing down of G1 phase under moderate hypoxia, and the entry into quiescence of proliferating cells under severe hypoxia. We show how the inhibition of cyclin D by HiF-1α can induce quiescence; this result provides a theoretical explanation to the experimental observations of Wen et al. (2010) [50]. Thus, our model confirms that hypoxia-induced chemoresistance can be linked, for a part, to the negative regulation of cyclin D by HiF-1α.
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42
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Chronic hypoxia leads to a glycolytic phenotype and suppressed HIF-2 signaling in PC12 cells. Biochim Biophys Acta Gen Subj 2013; 1830:3553-69. [DOI: 10.1016/j.bbagen.2013.02.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Revised: 01/22/2013] [Accepted: 02/15/2013] [Indexed: 12/12/2022]
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43
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Abstract
The metabolic properties of cancer cells diverge significantly from those of normal cells. Energy production in cancer cells is abnormally dependent on aerobic glycolysis. In addition to the dependency on glycolysis, cancer cells have other atypical metabolic characteristics such as increased fatty acid synthesis and increased rates of glutamine metabolism. Emerging evidence shows that many features characteristic to cancer cells, such as dysregulated Warburg-like glucose metabolism, fatty acid synthesis and glutaminolysis are linked to therapeutic resistance in cancer treatment. Therefore, targeting cellular metabolism may improve the response to cancer therapeutics and the combination of chemotherapeutic drugs with cellular metabolism inhibitors may represent a promising strategy to overcome drug resistance in cancer therapy. Recently, several review articles have summarized the anticancer targets in the metabolic pathways and metabolic inhibitor-induced cell death pathways, however, the dysregulated metabolism in therapeutic resistance, which is a highly clinical relevant area in cancer metabolism research, has not been specifically addressed. From this unique angle, this review article will discuss the relationship between dysregulated cellular metabolism and cancer drug resistance and how targeting of metabolic enzymes, such as glucose transporters, hexokinase, pyruvate kinase M2, lactate dehydrogenase A, pyruvate dehydrogenase kinase, fatty acid synthase and glutaminase can enhance the efficacy of common therapeutic agents or overcome resistance to chemotherapy or radiotherapy.
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44
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Bienes-Martínez R, Ordóñez A, Feijoo-Cuaresma M, Corral-Escariz M, Mateo G, Stenina O, Jiménez B, Calzada MJ. Autocrine stimulation of clear-cell renal carcinoma cell migration in hypoxia via HIF-independent suppression of thrombospondin-1. Sci Rep 2012; 2:788. [PMID: 23145312 PMCID: PMC3494377 DOI: 10.1038/srep00788] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Accepted: 10/04/2012] [Indexed: 12/14/2022] Open
Abstract
Thrombospondin-1 is a matricellular protein with potent antitumour activities, the levels of which determine the fate of many different tumours, including renal carcinomas. However, the factors that regulate this protein remain unclear. In renal carcinomas, hypoxic conditions enhance the expression of angiogenic factors that help adapt tumour cells to their hostile environment. Therefore, we hypothesized that anti-angiogenic factors should correspondingly be dampened. Indeed, we found that hypoxia decreased the thrombospondin-1 protein in several clear cell renal carcinoma cell lines (ccRCC), although no transcriptional regulation was observed. Furthermore, we proved that hypoxia stimulates multiple signals that independently contribute to diminish thrombospondin-1 in ccRCC, which include a decrease in the activity of oxygen-dependent prolylhydroxylases (PHDs) and activation of the PI3K/Akt signalling pathway. In addition, thrombospondin-1 regulation in hypoxia proved to be important for ccRCC cell migration and invasion.
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Affiliation(s)
- Raquel Bienes-Martínez
- Instituto de Investigación Sanitaria Princesa, Department of Medicine, Universidad Autónoma of Madrid, Madrid, Spain
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45
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Barneda-Zahonero B, Parra M. Histone deacetylases and cancer. Mol Oncol 2012; 6:579-89. [PMID: 22963873 DOI: 10.1016/j.molonc.2012.07.003] [Citation(s) in RCA: 329] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Accepted: 07/30/2012] [Indexed: 12/23/2022] Open
Abstract
Reversible acetylation of histone and non-histone proteins is one of the most abundant post-translational modifications in eukaryotic cells. Protein acetylation and deacetylation are achieved by the antagonistic actions of two families of enzymes, histone acetyltransferases (HATs) and histone deacetylases (HDACs). Aberrant protein acetylation, particularly on histones, has been related to cancer while abnormal expression of HDACs has been found in a broad range of cancer types. Therefore, HDACs have emerged as promising targets in cancer therapeutics, and the development of HDAC inhibitors (HDIs), a rapidly evolving area of clinical research. However, the contributions of specific HDACs to a given cancer type remain incompletely understood. The aim of this review is to summarize the current knowledge concerning the role of HDACs in cancer with special emphasis on what we have learned from the analysis of patient samples.
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Affiliation(s)
- Bruna Barneda-Zahonero
- Cellular Differentiation Group, Cancer Epigenetics and Biology Program, Bellvitge Biomedical Research Institute, Av. Gran Via s/n km 2.7, 08908 L'Hospitalet, Barcelona, Spain
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46
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Matsunaga T, Imataki O, Torii E, Kameda T, Shide K, Shimoda H, Kamiunten A, Sekine M, Taniguchi Y, Yamamoto S, Hidaka T, Katayose K, Kubuki Y, Dobashi H, Bandoh S, Ohnishi H, Fukai F, Shimoda K. Elevated HIF-1α expression of acute myelogenous leukemia stem cells in the endosteal hypoxic zone may be a cause of minimal residual disease in bone marrow after chemotherapy. Leuk Res 2012; 36:e122-4. [PMID: 22444690 DOI: 10.1016/j.leukres.2012.02.028] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Revised: 02/10/2012] [Accepted: 02/27/2012] [Indexed: 10/28/2022]
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47
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Xue X, Taylor M, Anderson E, Hao C, Qu A, Greenson JK, Zimmermann EM, Gonzalez FJ, Shah YM. Hypoxia-inducible factor-2α activation promotes colorectal cancer progression by dysregulating iron homeostasis. Cancer Res 2012; 72:2285-93. [PMID: 22419665 DOI: 10.1158/0008-5472.can-11-3836] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Hypoxia-inducible factor (HIF), a key modulator of the transcriptional response to hypoxia, is increased in colon cancer. However, the role of HIF in colon carcinogenesis in vivo remains unclear. In this study, we found that intestinal epithelium-specific disruption of the von Hippel-Lindau tumor suppressor protein (VHL) resulted in constitutive HIF signaling, and increased HIF expression augmented colon tumorigenesis in the Apc(min/+) intestinal tumor model. Intestine-specific disruption of Vhl increased colon tumor multiplicity and progression from adenomas to carcinomas. These effects were ameliorated in mice with double disruption of Vhl and HIF-2α. Activation of HIF signaling resulted in increased cell survival in normal colon tissue; however, tumor apoptosis was not affected. Interestingly, a robust activation of cyclin D1 was observed in tumors of Apc(min/+) mice in which HIF-2α was activated in the intestine. Consistent with this result, bromodeoxyuridine incorporation indicated that cellular proliferation was increased in colon tumors following HIF activation. Further analysis showed that dysregulation of the intestinal iron absorption transporter divalent metal transporter-1 (DMT-1) was a critical event in HIF-2α-mediated colon carcinogenesis. These data provide a mechanistic basis for the widely reported link between iron accumulation and colon cancer risk. Together, our findings show that a chronic increase in HIF-2α in the colon initiates protumorigenic signaling, which may have important implications in developing preventive and therapeutic strategies for colon cancer.
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Affiliation(s)
- Xiang Xue
- Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, Michigan, USA
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48
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Icreverzi A, de la Cruz AF, Van Voorhies WA, Edgar BA. Drosophila cyclin D/Cdk4 regulates mitochondrial biogenesis and aging and sensitizes animals to hypoxic stress. Cell Cycle 2012; 11:554-68. [PMID: 22293404 DOI: 10.4161/cc.11.3.19062] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Drosophila cyclinD (CycD) is the single fly ortholog of the mammalian cyclin D1 and promotes both cell cycle progression and cellular growth. However, little is known about how CycD promotes cell growth. We show here that CycD/Cdk4 hyperactivity leads to increased mitochondrial biogenesis (mitobiogenesis), mitochondrial mass, NRF-1 activity (Tfam transcript levels) and metabolic activity in Drosophila, whereas loss of CycD/Cdk4 activity has the opposite effects. Surprisingly, both CycD/Cdk4 addition and loss of function increase mitochondrial superoxide production and decrease lifespan, indicating that an imbalance in mitobiogenesis may lead to oxidative stress and aging. In addition, we provide multiple lines of evidence indicating that CycD/Cdk4 activity affects the hypoxic status of cells and sensitizes animals to hypoxia. Both mitochondrial and hypoxia-related effects can be detected at the global transcriptional level. We propose that mitobiogenesis and the hypoxic stress response have an antagonistic relationship, and that CycD/Cdk4 levels regulate mitobiogenesis contemporaneous to the cell cycle, such that only when cells are sufficiently oxygenated can they proliferate.
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Affiliation(s)
- Amalia Icreverzi
- Basic Science Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
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49
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Clocchiatti A, Florean C, Brancolini C. Class IIa HDACs: from important roles in differentiation to possible implications in tumourigenesis. J Cell Mol Med 2012; 15:1833-46. [PMID: 21435179 PMCID: PMC3918040 DOI: 10.1111/j.1582-4934.2011.01321.x] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Histone deacetylases (HDACs) are important regulators of gene expression. Specific structural features and distinct regulative mechanisms rationalize the separation of the 18 different human HDACs into four classes. The class II comprises a heterogeneous group of nuclear and cytosolic HDACs involved in the regulation of several cellular functions, not just limited to transcriptional repression. In particular, HDAC4, 5, 7 and 9 belong to the subclass IIa and share many transcriptional partners, including members of the MEF2 family. Genetic studies in mice have disclosed the fundamental contribution of class IIa HDACs to specific developmental/differentiation pathways. In this review, we discuss about the recent literature, which hints a role of class IIa HDACs in the development, growth and aggressiveness of cancer cells.
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Affiliation(s)
- Andrea Clocchiatti
- Dipartimento di Scienze Mediche e Biologiche and MATI Center of Excellence Università degli Studi di Udine, Udine, Italy
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50
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Dong XL, Xu PF, Miao C, Fu ZY, Li QP, Tang PY, Wang T. Hypoxia decreased chemosensitivity of breast cancer cell line MCF-7 to paclitaxel through cyclin B1. Biomed Pharmacother 2011; 66:70-5. [PMID: 22264882 DOI: 10.1016/j.biopha.2011.11.016] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Accepted: 11/01/2011] [Indexed: 11/28/2022] Open
Abstract
Hypoxia, frequently found in the center of solid tumors, may lead to enhance the production of key factor in cell survival, invasion, angiogenesis and loss of apoptosis. The low oxygen tension in hypoxic tumors is also known to interfere with the efficacy of chemotherapy, but the underlying mechanisms are not very clear. Paclitaxel (PTX) is an active agent used in breast cancer chemotherapy, which disturbs microtubule dynamics and impairs the transition of cells from metaphase to anaphase in mitosis, leading to cell death by apoptosis. In the present study, we try to determine whether hypoxia can decrease the chemosensitivity of human breast carcinoma cells to PTX and elucidate the underlying mechanism. We found that hypoxia could decrease PTX-induced cell death and G(2)/M arrest. Furthermore, our results showed that hypoxia inhibit PTX-induced soluble tubulin polymerized. In addition, we also found hypoxia could suppress PTX-induced cell cycle protein-cyclin B1 expression in MCF-7 cells. To further investigate whether the inhibitory effect of hypoxia on PTX-induced cell death is mediated by decreasing levels of cyclin B1, cyclin B1-transfected MCF-7 cells were used under hypoxic condition. The data showed that the hypoxia-based decreasing chemosensitivity of breast cancer cells to PTX was reversed by cyclin B1. We also found that overexpression of cyclin B1 could significantly increase the sensitivity of MCF-7 cells to PTX by stimulating soluble polymerized tubulin. Overall, hypoxia decreases cyclin B1, which could in turn reverse hypoxia-induced decreasing chemosensitivity to PTX in breast cancer cell line MCF-7.
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Affiliation(s)
- X L Dong
- Department of Internal Medicine of the Second Affiliated Hospital, Medical School of Xi'an Jiao Tong University, Xi'an, China
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