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Hao W, Wu L, Cao L, Yu J, Ning L, Wang J, Lin X, Chen Y. Radioresistant Nasopharyngeal Carcinoma Cells Exhibited Decreased Cisplatin Sensitivity by Inducing SLC1A6 Expression. Front Pharmacol 2021; 12:629264. [PMID: 33927617 PMCID: PMC8077170 DOI: 10.3389/fphar.2021.629264] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Accepted: 03/02/2021] [Indexed: 12/29/2022] Open
Abstract
Cisplatin-based regimens are commonly used for the treatment of nasopharyngeal carcinoma (NPC) in patients who receive concurrent chemoradiotherapy. The sensitivity of NPC cells to cisplatin is closely associated with the efficacy of radiation therapy. In this study, we established two radioresistant NPC cell lines, HONE1-IR and CNE2-IR, and found that both cell lines showed reduced sensitivity to cisplatin. RNA-sequence analysis showed that SLC1A6 was upregulated in both HONE1-IR and CNE2-IR cell lines. Downregulation of SLC1A6 enhanced cisplatin sensitivity in these two radioresistant NPC cell lines. It was also found that the expression of SLC1A6 was induced during radiation treatment and correlated with poor prognosis of NPC patients. Notably, we observed that upregulation of SLC1A6 led to elevating level of glutamate and the expression of drug-resistant genes, resulted in reduced cisplatin sensitivity. Our findings provide a rationale for developing a novel therapeutic target for NPC patients with cisplatin resistance.
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Affiliation(s)
- Wenwen Hao
- Department of Nasopharyngeal Carcinoma, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China.,Department of Head and Neck Surgery, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Lisha Wu
- Department of Oncology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Linhui Cao
- Department of Traditional Chinese Medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Jinxiu Yu
- Department of Radiotherapy, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Li Ning
- Department of Head and Neck Surgery, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Jingshu Wang
- Department of Oncology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xiaoping Lin
- Department of Nuclear Medicine, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Yanfeng Chen
- Department of Head and Neck Surgery, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
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2
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Stephan OOH. Implications of ionizing radiation on pollen performance in comparison with diverse models of polar cell growth. Plant Cell Environ 2021; 44:665-691. [PMID: 33124689 DOI: 10.1111/pce.13929] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 10/21/2020] [Accepted: 10/22/2020] [Indexed: 06/11/2023]
Abstract
Research concerning the effects of ionizing radiation (IR) on plant systems is essential for numerous aspects of human society, as for instance, in terms of agriculture and plant breeding, but additionally for elucidating consequences of radioactive contamination of the ecosphere. This comprehensive survey analyses effects of x- and γ-irradiation on male gametophytes comprising primarily in vitro but also in vivo data of diverse plant species. The IR-dose range for pollen performance was compiled and 50% inhibition doses (ID50 ) for germination and tube growth were comparatively related to physiological characteristics of the microgametophyte. Factors influencing IR-susceptibility of mature pollen and polarized tube growth were evaluated, such as dose-rate, environmental conditions, or species-related variations. In addition, all available reports suggesting bio-positive IR-effects particularly on pollen performance were examined. Most importantly, for the first time influences of IR specifically on diverse phylogenetic models of polar cell growth were comparatively analysed, and thus demonstrated that the gametophytic system of pollen is extremely resistant to IR, more than plant sporophytes and especially much more than comparable animal cells. Beyond that, this study develops hypotheses regarding a molecular basis for the extreme IR-resistance of the plant microgametophyte and highlights its unique rank among organismal systems.
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Affiliation(s)
- Octavian O H Stephan
- Department of Biology, Friedrich-Alexander University of Erlangen-Nuremberg, Erlangen, Germany
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Chevalier F, Hamdi DH, Lepleux C, Temelie M, Nicol A, Austry JB, Lesueur P, Vares G, Savu D, Nakajima T, Saintigny Y. High LET Radiation Overcomes In Vitro Resistance to X-Rays of Chondrosarcoma Cell Lines. Technol Cancer Res Treat 2020; 18:1533033819871309. [PMID: 31495269 PMCID: PMC6732854 DOI: 10.1177/1533033819871309] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Chondrosarcomas are malignant tumors of the cartilage that are chemoresistant and
radioresistant to X-rays. This restricts the treatment options essential to surgery. In
this study, we investigated the sensitivity of chondrosarcoma to X-rays and C-ions
in vitro. The sensitivity of 4 chondrosarcoma cell lines (SW1353,
CH2879, OUMS27, and L835) was determined by clonogenic survival assays and cell cycle
progression. In addition, biomarkers of DNA damage responses were analyzed in the SW1353
cell line. Chondrosarcoma cells showed a heterogeneous sensitivity toward irradiation.
Chondrosarcoma cell lines were more sensitive to C-ions exposure compared to X-rays. Using
D10 values, the relative biological effectiveness of C-ions was higher (relative
biological effectiveness = 5.5) with cells resistant to X-rays (CH2879) and lower
(relative biological effectiveness = 3.7) with sensitive cells (L835). C-ions induced more
G2 phase blockage and micronuclei in SW1353 cells as compared to X-rays with the same
doses. Persistent unrepaired DNA damage was also higher following C-ions irradiation.
These results indicate that chondrosarcoma cell lines displayed a heterogeneous response
to conventional radiation treatment; however, treatment with C-ions irradiation was more
efficient in killing chondrosarcoma cells, compared to X-rays.
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Affiliation(s)
- Francois Chevalier
- 1 CEA GANIL, Caen, France.,2 Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, Romania
| | - Dounia Houria Hamdi
- 1 CEA GANIL, Caen, France.,2 Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, Romania
| | - Charlotte Lepleux
- 1 CEA GANIL, Caen, France.,2 Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, Romania
| | - Mihaela Temelie
- 1 CEA GANIL, Caen, France.,2 Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, Romania.,3 Centre Paul Strauss, Strasbourg, Alsace, France
| | - Anaïs Nicol
- 3 Centre Paul Strauss, Strasbourg, Alsace, France
| | | | - Paul Lesueur
- 4 Centre Francois Baclesse Centre de Lutte Contre le Cancer, Caen, France
| | - Guillaume Vares
- 5 Okinawa Institute of Science and Technology, Kunigami-gun, Okinawa, Japan
| | - Diana Savu
- 2 Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, Romania
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Yadav S, Kowolik CM, Lin M, Zuro D, Hui SK, Riggs AD, Horne DA. SMC1A is associated with radioresistance in prostate cancer and acts by regulating epithelial-mesenchymal transition and cancer stem-like properties. Mol Carcinog 2018; 58:113-125. [PMID: 30242889 DOI: 10.1002/mc.22913] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 08/31/2018] [Accepted: 09/16/2018] [Indexed: 12/24/2022]
Abstract
Prostate cancer is one of the most commonly diagnosed cancers and a pressing health challenge in men worldwide. Radiation therapy (RT) is widely considered a standard therapy for advanced as well as localized prostate cancer. Although this primary therapy is associated with high cancer control rates, up to one-third of patients undergoing radiation therapy becomes radio-resistant and/or has tumor-relapse/recurrence. Therefore, focus on new molecular targets and pathways is essential to develop novel radio-sensitizing agents for the effective and safe treatment of prostate cancer. Here, we describe functional studies that were performed to investigate the role of structural maintenance of chromosome-1 (SMC1A) in radioresistance of metastatic prostate cancer cells. Short hairpin RNA (shRNA) was used to suppress SMC1A in metastatic castration-resistant prostate cancer cells, DU145 and PC3. Clonogenic survival assays, Western blot, RT-PCR, and γ-H2AX staining were used to assess the effect of SMC1A knockdown on radiation sensitivity of these prostate cancer cells. We demonstrate that SMC1A is overexpressed in human prostate tumors compared to the normal adjacent tissue. SMC1A knockdown limits the clonogenic potential, epithelial-mesenchymal transition (EMT), and cancer stem-like cell (CSC) properties of DU145 and PC3 cells and enhanced efficacy of RT in these cells. Targeted inhibition of SMC1A not only plays a critical role in overcoming radio-resistance in prostate cancer cells, but also suppresses self-renewal and the tumor-propagating potential of x-irradiated cancer cells. We propose that SMC1A could be a potential molecular target for the development of novel radio-sensitizing therapeutic agents for management of radio-resistant metastatic prostate cancer.
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Affiliation(s)
- Sushma Yadav
- Department of Translational Research and Cellular Therapeutics, City of Hope National Medical Center, Duarte, California.,Department of Molecular Medicine, City of Hope National Medical Center, Duarte, California
| | - Claudia M Kowolik
- Department of Molecular Medicine, City of Hope National Medical Center, Duarte, California
| | - Min Lin
- Department of Molecular Medicine, City of Hope National Medical Center, Duarte, California
| | - Darren Zuro
- Department of Radiation Oncology, City of Hope National Medical Center, Duarte, California
| | - Susanta K Hui
- Department of Radiation Oncology, City of Hope National Medical Center, Duarte, California
| | - Arthur D Riggs
- Diabetes and Metabolism Research Institute, City of Hope National Medical Center, Duarte, California
| | - David A Horne
- Department of Molecular Medicine, City of Hope National Medical Center, Duarte, California
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Farci D, Slavov C, Tramontano E, Piano D. The S-layer Protein DR_2577 Binds Deinoxanthin and under Desiccation Conditions Protects against UV-Radiation in Deinococcus radiodurans. Front Microbiol 2016; 7:155. [PMID: 26909071 PMCID: PMC4754619 DOI: 10.3389/fmicb.2016.00155] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Accepted: 01/29/2016] [Indexed: 11/13/2022] Open
Abstract
Deinococcus radiodurans has the puzzling ability to withstand over a broad range of extreme conditions including high doses of ultraviolet radiation and deep desiccation. This bacterium is surrounded by a surface layer (S-layer) built of a regular repetition of several proteins, assembled to form a paracrystalline structure. Here we report that the deletion of a main constituent of this S-layer, the gene DR_2577, causes a decrease in the UVC resistance, especially in desiccated cells. Moreover, we show that the DR_2577 protein binds the carotenoid deinoxanthin, a strong protective antioxidant specific of this bacterium. A further spectroscopical characterization of the deinoxanthin-DR_2577 complex revealed features which could suggest a protective role of DR_2577. We propose that, especially under desiccation, the S-layer shields the bacterium from incident ultraviolet light and could behave as a first lane of defense against UV radiation.
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Affiliation(s)
- Domenica Farci
- Laboratory of Plant Physiology and Photobiology, Department of Life and Environmental Sciences, University of Cagliari Cagliari, Italy
| | - Chavdar Slavov
- Department of Physical Chemistry, Institute of Physical and Theoretical Chemistry Frankfurt am Main, Germany
| | - Enzo Tramontano
- Laboratory of Molecular Virology, Department of Life and Environmental Sciences, University of Cagliari Cagliari, Italy
| | - Dario Piano
- Laboratory of Plant Physiology and Photobiology, Department of Life and Environmental Sciences, University of CagliariCagliari, Italy; International Institute of Molecular and Cell BiologyWarsaw, Poland
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Egas C, Barroso C, Froufe HJC, Pacheco J, Albuquerque L, da Costa MS. Complete genome sequence of the Radiation-Resistant bacterium Rubrobacter radiotolerans RSPS-4. Stand Genomic Sci 2014; 9:1062-75. [PMID: 25197483 PMCID: PMC4148983 DOI: 10.4056/sigs.5661021] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Rubrobacter radiotolerans strain RSPS-4 is a slightly thermophilic member of the phylum “Actinobacteria” isolated from a hot spring in São Pedro do Sul, Portugal. This aerobic and halotolerant bacterium is also extremely resistant to gamma and UV radiation, which are the main reasons for the interest in sequencing its genome. Here, we present the complete genome sequence of strain RSPS-4 as well as its assembly and annotation. We also compare the gene sequence of this organism with that of the type strain of the species R. radiotolerans isolated from a hot spring in Japan. The genome of strain RSPS-4 comprises one circular chromosome of 2,875,491 bp with a G+C content of 66.91%, and 3 circular plasmids of 190,889 bp, 149,806 bp and 51,047 bp, harboring 3,214 predicted protein coding genes, 46 tRNA genes and a single rRNA operon.
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Affiliation(s)
- C Egas
- Next Generation Sequencing Unit, Biocant, Biotechnology Innovation Center, Cantanhede, Portugal
| | - C Barroso
- Next Generation Sequencing Unit, Biocant, Biotechnology Innovation Center, Cantanhede, Portugal
| | - H J C Froufe
- Next Generation Sequencing Unit, Biocant, Biotechnology Innovation Center, Cantanhede, Portugal
| | - J Pacheco
- Next Generation Sequencing Unit, Biocant, Biotechnology Innovation Center, Cantanhede, Portugal
| | - L Albuquerque
- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - M S da Costa
- Department of Life Sciences, University of Coimbra, Coimbra, Portugal
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