Hypoxia-Induced Reactive Oxygen Species Cause Chromosomal Abnormalities in Endothelial Cells in the Tumor Microenvironment
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{"title"=>"Hypoxia-induced reactive oxygen species cause chromosomal abnormalities in endothelial cells in the tumor microenvironment", "type"=>"journal", "authors"=>[{"first_name"=>"Miyako", "last_name"=>"Kondoh", "scopus_author_id"=>"55155037400"}, {"first_name"=>"Noritaka", "last_name"=>"Ohga", "scopus_author_id"=>"16316917700"}, {"first_name"=>"Kosuke", "last_name"=>"Akiyama", "scopus_author_id"=>"55004987100"}, {"first_name"=>"Yasuhiro", "last_name"=>"Hida", "scopus_author_id"=>"7006362906"}, {"first_name"=>"Nako", "last_name"=>"Maishi", "scopus_author_id"=>"37117464700"}, {"first_name"=>"Alam Mohammad", "last_name"=>"Towfik", "scopus_author_id"=>"55212222600"}, {"first_name"=>"Nobuo", "last_name"=>"Inoue", "scopus_author_id"=>"56403941600"}, {"first_name"=>"Masanobu", "last_name"=>"Shindoh", "scopus_author_id"=>"7006497757"}, {"first_name"=>"Kyoko", "last_name"=>"Hida", "scopus_author_id"=>"7103235315"}], "year"=>2013, "source"=>"PLoS ONE", "identifiers"=>{"sgr"=>"84894044753", "issn"=>"19326203", "doi"=>"10.1371/journal.pone.0080349", "pmid"=>"24260373", "pui"=>"372377644", "scopus"=>"2-s2.0-84894044753", "isbn"=>"1932-6203 (Electronic)\\r1932-6203 (Linking)"}, "id"=>"5686a27c-f414-316b-86a3-fe6f90f419ba", "abstract"=>"There is much evidence that hypoxia in the tumor microenvironment enhances tumor progression. In an earlier study, we reported abnormal phenotypes of tumor-associated endothelial cells such as those resistant to chemotherapy and chromosomal instability. Here we investigated the role of hypoxia in the acquisition of chromosomal abnormalities in endothelial cells. Tumor-associated endothelial cells isolated from human tumor xenografts showed chromosomal abnormalities, >30% of which were aneuploidy. Aneuploidy of the tumor-associated endothelial cells was also shown by simultaneous in-situ hybridization for chromosome 17 and by immunohistochemistry with anti-CD31 antibody for endothelial staining. The aneuploid cells were surrounded by a pimonidazole-positive area, indicating hypoxia. Human microvascular endothelial cells expressed hypoxia-inducible factor 1 and vascular endothelial growth factor A in response to either hypoxia or hypoxia-reoxygenation, and in these conditions, they acquired aneuploidy in 7 days. Induction of aneuploidy was inhibited by either inhibition of vascular endothelial growth factor signaling with vascular endothelial growth factor receptor 2 inhibitor or by inhibition of reactive oxygen species by N-acetyl-L-cysteine. These results indicate that hypoxia induces chromosomal abnormalities in endothelial cells through the induction of reactive oxygen species and excess signaling of vascular endothelial growth factor in the tumor microenvironment.", "link"=>"http://www.mendeley.com/research/hypoxiainduced-reactive-oxygen-species-cause-chromosomal-abnormalities-endothelial-cells-tumor-micro-2", "reader_count"=>36, "reader_count_by_academic_status"=>{"Professor > Associate Professor"=>1, "Researcher"=>6, "Student > Doctoral Student"=>2, "Student > Ph. D. Student"=>12, "Student > Postgraduate"=>3, "Student > Master"=>8, "Other"=>1, "Lecturer"=>1, "Professor"=>2}, "reader_count_by_user_role"=>{"Professor > Associate Professor"=>1, "Researcher"=>6, "Student > Doctoral Student"=>2, "Student > Ph. D. Student"=>12, "Student > Postgraduate"=>3, "Student > Master"=>8, "Other"=>1, "Lecturer"=>1, "Professor"=>2}, "reader_count_by_subject_area"=>{"Engineering"=>2, "Biochemistry, Genetics and Molecular Biology"=>6, "Medicine and Dentistry"=>8, "Agricultural and Biological Sciences"=>17, "Physics and Astronomy"=>2, "Chemistry"=>1}, "reader_count_by_subdiscipline"=>{"Engineering"=>{"Engineering"=>2}, "Medicine and Dentistry"=>{"Medicine and Dentistry"=>8}, "Chemistry"=>{"Chemistry"=>1}, "Physics and Astronomy"=>{"Physics and Astronomy"=>2}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>17}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>6}}, "reader_count_by_country"=>{"United States"=>1}, "group_count"=>1}

Scopus | Further Information

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/1284502"], "description"=>"<p>(A) The hypoxic area in human tumor xenografts in nude mice was analyzed using the hypoxia marker pimonidazole and CA IX. Tumor tissues were double-stained with anti-CD31 (red) and anti-pimonidazole antibodies or anti-CA IX (green) to visualize hypoxic areas. Pimonidazole staining revealed that tumor vessels were exposed to hypoxia to some extent. Scale bar, 100 μm. (B) HMVECs were cultured and treated for 8 h under normoxia or hypoxia. HIF-1α protein was upregulated 8 h after hypoxia, as revealed by western blotting. Densitometry analysis revealed that HIF-1α was induced by hypoxia. (C) HMVECs were cultured and treated for 8 h under normoxia or hypoxia. HIF-1α protein was upregulated 8 h after hypoxia, as revealed by western blotting. Densitometry analysis revealed that HIF-1α was induced by hypoxia. The experiment was repeated three times. Representative data is shown. (D) mRNA levels of VEGF-A were significantly increased by hypoxia in HMVECs. Experiments were performed in triplicate. *p < 0.01.</p>", "links"=>[], "tags"=>["vegf-a"], "article_id"=>853632, "categories"=>["Biological Sciences"], "users"=>["Miyako Kondoh", "Noritaka Ohga", "Kosuke Akiyama", "Yasuhiro Hida", "Nako Maishi", "Alam Mohammad Towfik", "Nobuo Inoue", "Masanobu Shindoh", "Kyoko Hida"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0080349.g002", "stats"=>{"downloads"=>2, "page_views"=>5, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Hypoxia_induces_HIF_1_945_and_VEGF_A_expression_in_ECs_/853632", "title"=>"Hypoxia induces HIF-1α and VEGF-A expression in ECs.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-11-15 03:41:42"}
  • {"files"=>["https://ndownloader.figshare.com/files/1284521", "https://ndownloader.figshare.com/files/1284522", "https://ndownloader.figshare.com/files/1284523"], "description"=>"<div><p>There is much evidence that hypoxia in the tumor microenvironment enhances tumor progression. In an earlier study, we reported abnormal phenotypes of tumor-associated endothelial cells such as those resistant to chemotherapy and chromosomal instability. Here we investigated the role of hypoxia in the acquisition of chromosomal abnormalities in endothelial cells. Tumor-associated endothelial cells isolated from human tumor xenografts showed chromosomal abnormalities, >30% of which were aneuploidy. Aneuploidy of the tumor-associated endothelial cells was also shown by simultaneous in-situ hybridization for chromosome 17 and by immunohistochemistry with anti-CD31 antibody for endothelial staining. The aneuploid cells were surrounded by a pimonidazole-positive area, indicating hypoxia. Human microvascular endothelial cells expressed hypoxia-inducible factor 1 and vascular endothelial growth factor A in response to either hypoxia or hypoxia-reoxygenation, and in these conditions, they acquired aneuploidy in 7 days. Induction of aneuploidy was inhibited by either inhibition of vascular endothelial growth factor signaling with vascular endothelial growth factor receptor 2 inhibitor or by inhibition of reactive oxygen species by N-acetyl-L-cysteine. These results indicate that hypoxia induces chromosomal abnormalities in endothelial cells through the induction of reactive oxygen species and excess signaling of vascular endothelial growth factor in the tumor microenvironment.</p> </div>", "links"=>[], "tags"=>["reactive", "chromosomal", "abnormalities", "endothelial", "cells"], "article_id"=>853645, "categories"=>["Biological Sciences"], "users"=>["Miyako Kondoh", "Noritaka Ohga", "Kosuke Akiyama", "Yasuhiro Hida", "Nako Maishi", "Alam Mohammad Towfik", "Nobuo Inoue", "Masanobu Shindoh", "Kyoko Hida"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0080349.s001", "https://dx.doi.org/10.1371/journal.pone.0080349.s002", "https://dx.doi.org/10.1371/journal.pone.0080349.s003"], "stats"=>{"downloads"=>4, "page_views"=>7, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Hypoxia_Induced_Reactive_Oxygen_Species_Cause_Chromosomal_Abnormalities_in_Endothelial_Cells_in_the_Tumor_Microenvironment_/853645", "title"=>"Hypoxia-Induced Reactive Oxygen Species Cause Chromosomal Abnormalities in Endothelial Cells in the Tumor Microenvironment", "pos_in_sequence"=>0, "defined_type"=>4, "published_date"=>"2013-11-15 03:41:42"}
  • {"files"=>["https://ndownloader.figshare.com/files/1284498"], "description"=>"<p>(A) Cultured NECs and TECs are positive for CD31, CD105, CD144, VEGFR1, and VEGFR2 and negative for CD11b and CD45. Human HB-EGF expression is shown in CD31 negative cells and human tumor cells (Melanoma and Oral carcinoma: Oral-Ca) using a human primer, but not in TECs. Abbreviation: NCT = Negative Control Template. (B) TECs showed a higher proliferation rate compared with NECs. (C) Expression levels of the angiogenesis-related gene VEGF in ECs by real-time PCR. Expression levels of VEGF were higher in TECs than in NECs. (D) Cultured ECs were stained with FITC-conjugated BS1-B4 lectin, and FISH was performed using a Cy3-mouse chromosome-17 locus-specific BAC probe. Red, chromosome 17; green, BS1-B4. FISH revealed aneuploidy in 42% melanoma ECs, 40.2% oral carcinoma ECs, and 7.9% NECs. Freshly isolated and noncultured TECs were cytospun onto a glass slide and immunostained for CD31 (green) and subjected to FISH. Aneuploidy was observed in 35.6% melanoma ECs, 35.0% oral carcinoma ECs, and 8.7% NECs. Scale bar, 10 μm. Experiments were performed in triplicate. *<i>p</i> < 0.01.</p>", "links"=>[], "tags"=>["endothelial"], "article_id"=>853630, "categories"=>["Biological Sciences"], "users"=>["Miyako Kondoh", "Noritaka Ohga", "Kosuke Akiyama", "Yasuhiro Hida", "Nako Maishi", "Alam Mohammad Towfik", "Nobuo Inoue", "Masanobu Shindoh", "Kyoko Hida"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0080349.g001", "stats"=>{"downloads"=>0, "page_views"=>17, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Tumor_endothelial_cell_TEC_characteristics_/853630", "title"=>"Tumor endothelial cell (TEC) characteristics.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-11-15 03:41:42"}
  • {"files"=>["https://ndownloader.figshare.com/files/1284517"], "description"=>"<p>To analyze the hypoxic area in TECs in in-vivo tumors, frozen sections of tumors were immunostained with anti-CD31 (red) and anti-pimonidazole (green) followed by FISH using a spectrum red-conjugated mouse chromosome-17 locus-specific probe (red spot). Representative CD31-positive ECs in tumor tissue. (A, D, G) The blood vessels in tumor tissue were pimonidazole-positive. (B, E, H) Nuclei are stained with DAPI (blue). Aneuploidy was also observed in ECs of tumor blood vessels exposed to hypoxia. (C, F, I) Pimonidazole-nagative ECs in tumor tissue did not exhibit aneuploidy. (J, K, L) ECs in normal tissue did not exhibit aneuploidy. (M, N, O) Scale bar, 20 μm.</p>", "links"=>[], "tags"=>["hypoxia", "ploidy", "tecs", "hypoxic", "areas", "supermetastatic", "cryosections"], "article_id"=>853641, "categories"=>["Biological Sciences"], "users"=>["Miyako Kondoh", "Noritaka Ohga", "Kosuke Akiyama", "Yasuhiro Hida", "Nako Maishi", "Alam Mohammad Towfik", "Nobuo Inoue", "Masanobu Shindoh", "Kyoko Hida"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0080349.g005", "stats"=>{"downloads"=>1, "page_views"=>29, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Assessment_of_tumor_tissue_hypoxia_and_analysis_of_ploidy_in_TECs_by_FISH_Hypoxic_areas_in_supermetastatic_tumor_cryosections_were_detected_using_hypoxyprobe_/853641", "title"=>"Assessment of tumor tissue hypoxia and analysis of ploidy in TECs by FISH Hypoxic areas in supermetastatic tumor cryosections were detected using hypoxyprobe.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-11-15 03:41:42"}
  • {"files"=>["https://ndownloader.figshare.com/files/1284509"], "description"=>"<p>Karyotypes of HMVECs after exposure to normoxia, hypoxia (1% O2), and hypoxia-reoxygenation were analyzed by Q band analysis. A karyotype of one cell in each condition is shown. (A) HMVECs in normoxia were essentially diploid. (B, C) HMVECs exposed to hypoxia and hypoxia-reoxygenation had complex abnormal karyotypes and were aneuploid. (D) The chromosome number of each condition was counted and shown.</p>", "links"=>[], "tags"=>["hmvecs", "exposed"], "article_id"=>853639, "categories"=>["Biological Sciences"], "users"=>["Miyako Kondoh", "Noritaka Ohga", "Kosuke Akiyama", "Yasuhiro Hida", "Nako Maishi", "Alam Mohammad Towfik", "Nobuo Inoue", "Masanobu Shindoh", "Kyoko Hida"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0080349.g004", "stats"=>{"downloads"=>1, "page_views"=>11, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Karyotypes_of_HMVECs_exposed_to_hypoxia_/853639", "title"=>"Karyotypes of HMVECs exposed to hypoxia.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-11-15 03:41:42"}
  • {"files"=>["https://ndownloader.figshare.com/files/1284508"], "description"=>"<p>(A, B) After HMVECs were cultured in each condition for 7 days, FISH analysis using a chromosome-7 probe revealed that approximately 22.8% ECs in the hypoxic condition (1% O2) and 19.8% ECs in the hypoxia-reoxygenation condition were aneuploid, whereas 6.4% ECs in the normoxic condition were aneuploid. (C, D) FISH analysis using a chromosome-8 probe revealed that approximately 19.1% ECs in the hypoxic condition and 23.3% of ECs in the hypoxia-reoxygenation condition were aneuploid, whereas 8.5% ECs in the normoxic condition were aneuploid.</p>", "links"=>[], "tags"=>["aneuploidy"], "article_id"=>853638, "categories"=>["Biological Sciences"], "users"=>["Miyako Kondoh", "Noritaka Ohga", "Kosuke Akiyama", "Yasuhiro Hida", "Nako Maishi", "Alam Mohammad Towfik", "Nobuo Inoue", "Masanobu Shindoh", "Kyoko Hida"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0080349.g003", "stats"=>{"downloads"=>1, "page_views"=>16, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Hypoxia_induces_aneuploidy_in_HMVECs_/853638", "title"=>"Hypoxia induces aneuploidy in HMVECs.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-11-15 03:41:42"}
  • {"files"=>["https://ndownloader.figshare.com/files/1284519"], "description"=>"<div><p>(A)\tCellular ROS in HMVECs were analyzed after exposure to normoxia, hypoxia (1% O2), and hypoxia-reoxygenation for 7 days. The experiment was repeated three times. Representative data is shown. (B) The ROS inducer pyocyanin increased EC aneuploidy in a concentration-dependent manner. (C) Inhibition of RO.</p>\n\t\t\t\t\t\t<p>(B)\tS by the ROS scavenger N-acetyl-cysteine (NAC) decreased hypoxia-induced aneuploidy in ECs. (D) Involvement of VEGF signaling in ROS production. Hypoxia-stimulated HMVECs reduced ROS production in the presence of the VEGFR inhibitor Ki8757. The experiment was repeated three times. Representative data is shown. (E) Aneuploidy induced by the hypoxic condition in HMVECs was significantly suppressed by Ki8751. *<i>p</i> < 0.05.</p></div>", "links"=>[], "tags"=>["elevates", "ros", "vegf", "aneuploidy", "ecs", "exposed"], "article_id"=>853643, "categories"=>["Biological Sciences"], "users"=>["Miyako Kondoh", "Noritaka Ohga", "Kosuke Akiyama", "Yasuhiro Hida", "Nako Maishi", "Alam Mohammad Towfik", "Nobuo Inoue", "Masanobu Shindoh", "Kyoko Hida"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0080349.g007", "stats"=>{"downloads"=>0, "page_views"=>14, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Hypoxia_elevates_ROS_production_and_VEGF_signaling_increases_aneuploidy_in_ECs_exposed_to_hypoxia_/853643", "title"=>"Hypoxia elevates ROS production and VEGF signaling increases aneuploidy in ECs exposed to hypoxia.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-11-15 03:41:42"}
  • {"files"=>["https://ndownloader.figshare.com/files/1284518"], "description"=>"<p>(A) Cell number and the cell cycle in HMVECs exposed to hypoxia were analyzed by flow cytometry after staining fixed cells with propidium iodide. In each phase, cultured ECs proliferated for 7 days (normoxia, 2.5-fold; hypoxia (1% O<sub>2</sub>), 1.6-fold; hypoxia-reoxygenation, 2.4-fold versus Day 0 cell numbers). (B) We analyzed the distribution of ECs throughout the cell cycle by flow cytometry. There was no significant difference in cell-cycle distribution between conditions of normoxia and hypoxia. The experiment was repeated three times, and representative data is shown.</p>", "links"=>[], "tags"=>["ec", "aneuploidy", "hmvecs", "exposed"], "article_id"=>853642, "categories"=>["Biological Sciences"], "users"=>["Miyako Kondoh", "Noritaka Ohga", "Kosuke Akiyama", "Yasuhiro Hida", "Nako Maishi", "Alam Mohammad Towfik", "Nobuo Inoue", "Masanobu Shindoh", "Kyoko Hida"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0080349.g006", "stats"=>{"downloads"=>2, "page_views"=>11, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Association_between_cell_cycle_and_EC_aneuploidy_in_HMVECs_exposed_to_hypoxia_/853642", "title"=>"Association between cell cycle and EC aneuploidy in HMVECs exposed to hypoxia.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-11-15 03:41:42"}

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Relative Metric

{"start_date"=>"2013-01-01T00:00:00Z", "end_date"=>"2013-12-31T00:00:00Z", "subject_areas"=>[{"subject_area"=>"/Biology and life sciences/Anatomy and physiology", "average_usage"=>[256, 428]}, {"subject_area"=>"/Biology and life sciences/Cell biology", "average_usage"=>[272, 472, 600, 713, 815, 911, 1004, 1094, 1185, 1273, 1358, 1441]}, {"subject_area"=>"/Biology and life sciences/Genetics", "average_usage"=>[284, 491, 620, 738, 843, 945, 1043, 1137, 1225, 1315, 1400, 1479, 1555]}, {"subject_area"=>"/Medicine and health sciences/Anatomy", "average_usage"=>[248, 441, 564, 668, 769, 859, 948, 1034, 1117, 1202, 1290, 1368, 1437]}, {"subject_area"=>"/Medicine and health sciences/Pulmonology", "average_usage"=>[241, 428, 552, 659, 752, 848, 934, 1028, 1106, 1183, 1267, 1350, 1401]}]}
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