Induction of fragility at the human RNU2 locus by cytosine arabinoside is dependent upon a transcriptionally competent U2 small nuclear RNA gene and the expression of p53
Chromosomal fragile sites are regions that are intrinsically unstable and are susceptible to experimentally induced damage. In most cases, the target and mechanism of induction of fragility are unknown. Using ectopic integration of engineered DNA arrays to create "new" fragile sites, we an...
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| Veröffentlicht in: | Somatic cell and molecular genetics 1997-11, Vol.23 (6), p.379-389 |
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| container_title | Somatic cell and molecular genetics |
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| creator | MacArthur, H L Agarwal, M L Bacchetti, S |
| description | Chromosomal fragile sites are regions that are intrinsically unstable and are susceptible to experimentally induced damage. In most cases, the target and mechanism of induction of fragility are unknown. Using ectopic integration of engineered DNA arrays to create "new" fragile sites, we and others have previously shown that the transcriptionally competent U2 gene is necessary and sufficient for induction of fragility at the RNU2 locus upon infection of human cells with Adenovirus 12. In the present study we have investigated the response of the RNU2 locus to cytosine arabinoside (araC), an inhibitor of DNA polymerases and a common inducer of fragile sites. We demonstrate that the RNU2 locus is sensitive to the drug and that araC-induced fragility is dependent upon a functional U2 gene and on the expression of the cellular p53 protein. Our results identify a novel DNA structure associated with fragile sites and suggest a role for transcription and repair processes in RNU2 fragility. |
| doi_str_mv | 10.1007/bf02673748 |
| format | Article |
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In most cases, the target and mechanism of induction of fragility are unknown. Using ectopic integration of engineered DNA arrays to create "new" fragile sites, we and others have previously shown that the transcriptionally competent U2 gene is necessary and sufficient for induction of fragility at the RNU2 locus upon infection of human cells with Adenovirus 12. In the present study we have investigated the response of the RNU2 locus to cytosine arabinoside (araC), an inhibitor of DNA polymerases and a common inducer of fragile sites. We demonstrate that the RNU2 locus is sensitive to the drug and that araC-induced fragility is dependent upon a functional U2 gene and on the expression of the cellular p53 protein. 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In most cases, the target and mechanism of induction of fragility are unknown. Using ectopic integration of engineered DNA arrays to create "new" fragile sites, we and others have previously shown that the transcriptionally competent U2 gene is necessary and sufficient for induction of fragility at the RNU2 locus upon infection of human cells with Adenovirus 12. In the present study we have investigated the response of the RNU2 locus to cytosine arabinoside (araC), an inhibitor of DNA polymerases and a common inducer of fragile sites. We demonstrate that the RNU2 locus is sensitive to the drug and that araC-induced fragility is dependent upon a functional U2 gene and on the expression of the cellular p53 protein. Our results identify a novel DNA structure associated with fragile sites and suggest a role for transcription and repair processes in RNU2 fragility.</description><subject>Antimetabolites, Antineoplastic - pharmacology</subject><subject>Chromosome Fragile Sites</subject><subject>Chromosome Fragility</subject><subject>Cytarabine - pharmacology</subject><subject>DNA - drug effects</subject><subject>Humans</subject><subject>RNA, Small Nuclear - drug effects</subject><subject>RNA, Small Nuclear - genetics</subject><subject>RNA, Small Nuclear - metabolism</subject><subject>Transcription, Genetic</subject><subject>Tumor Suppressor Protein p53 - metabolism</subject><issn>0740-7750</issn><issn>1572-9931</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1997</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNo9kcFO3TAQRa2qCF5pN91X8qqLSoFxHMfJElBpkRBIVVlHE3sCrhIn2I7E-yW-Ej94dDXW-PhcS5exrwJOBIA-7Qcoay111XxgG6F0WbStFB_ZBnQFhdYKjtinGP8BQNNIdcgO27oWGsSGPV95u5rkZs_ngQ8B793o0pZj4umB-MM6oed_bu5KPs5mjbzfcrNNc3SeOAbsnc9nS9xFbmkhb8knvi5ZhzwF9NEEt-z0OI756TwtlHZIFsYp77hfzUgYcsYZv6ed1dvXaHpaAsW4_9mi5Gd2MOAY6ct-HrO7y59_L34X17e_ri7OrgsjhUyF1FpbKEuknrDVUCshgLQwElWjsbJNviBC2-pSEam20YMYytY0VGklQR6z72_eJcyPK8XUTS4aGkf0NK-xE3WlFJRtBn-8gSbMMQYauiW4CcO2E9DtiunOL9-LyfC3vXXtJ7L_0X0T8gXp1Yqy</recordid><startdate>19971101</startdate><enddate>19971101</enddate><creator>MacArthur, H L</creator><creator>Agarwal, M L</creator><creator>Bacchetti, S</creator><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>FR3</scope><scope>P64</scope><scope>RC3</scope></search><sort><creationdate>19971101</creationdate><title>Induction of fragility at the human RNU2 locus by cytosine arabinoside is dependent upon a transcriptionally competent U2 small nuclear RNA gene and the expression of p53</title><author>MacArthur, H L ; Agarwal, M L ; Bacchetti, S</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c313t-3777d022aebea97065110e71c3a587a4d8ebeeead9725ee5987f1f29c8e475303</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1997</creationdate><topic>Antimetabolites, Antineoplastic - pharmacology</topic><topic>Chromosome Fragile Sites</topic><topic>Chromosome Fragility</topic><topic>Cytarabine - pharmacology</topic><topic>DNA - drug effects</topic><topic>Humans</topic><topic>RNA, Small Nuclear - drug effects</topic><topic>RNA, Small Nuclear - genetics</topic><topic>RNA, Small Nuclear - metabolism</topic><topic>Transcription, Genetic</topic><topic>Tumor Suppressor Protein p53 - metabolism</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>MacArthur, H L</creatorcontrib><creatorcontrib>Agarwal, M L</creatorcontrib><creatorcontrib>Bacchetti, S</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Genetics Abstracts</collection><jtitle>Somatic cell and molecular genetics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>MacArthur, H L</au><au>Agarwal, M L</au><au>Bacchetti, S</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Induction of fragility at the human RNU2 locus by cytosine arabinoside is dependent upon a transcriptionally competent U2 small nuclear RNA gene and the expression of p53</atitle><jtitle>Somatic cell and molecular genetics</jtitle><addtitle>Somat Cell Mol Genet</addtitle><date>1997-11-01</date><risdate>1997</risdate><volume>23</volume><issue>6</issue><spage>379</spage><epage>389</epage><pages>379-389</pages><issn>0740-7750</issn><eissn>1572-9931</eissn><abstract>Chromosomal fragile sites are regions that are intrinsically unstable and are susceptible to experimentally induced damage. 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| ispartof | Somatic cell and molecular genetics, 1997-11, Vol.23 (6), p.379-389 |
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| language | eng |
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| source | MEDLINE; SpringerLink |
| subjects | Antimetabolites, Antineoplastic - pharmacology Chromosome Fragile Sites Chromosome Fragility Cytarabine - pharmacology DNA - drug effects Humans RNA, Small Nuclear - drug effects RNA, Small Nuclear - genetics RNA, Small Nuclear - metabolism Transcription, Genetic Tumor Suppressor Protein p53 - metabolism |
| title | Induction of fragility at the human RNU2 locus by cytosine arabinoside is dependent upon a transcriptionally competent U2 small nuclear RNA gene and the expression of p53 |
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