caa a22 4500 378849697 CHVBK 20180305123320.0 cr unu---uuuuu 161128e20030127xx s 000 0 eng 10.1515/BC.2003.018 doi (NATIONALLICENCE)gruyter-10.1515/BC.2003.018 The Cellular Control Enzyme PolyADP RibosylTransferase Is Eliminated in Cultured FanconiAnemia Fibroblasts at Confluency [Elektronische Daten] [M.H. Ramirez, C. Adelfalk, M. Kontou, M. Hirsch-Kauffmann, M. Schweiger] Fanconi anemia (FA) is a hereditary disease of unknown pathogenic mechanisms, although mutations in seven different genes can be causative. Six of these genes have been cloned and sequenced. Only slight homology to the DNA of any other known gene has been found with the exception of FANCG which is identical to XRCC9. The function of these genes, including XRCC9, is presently unknown. Since pADP ribosyl transferase (pADPRT) plays a role in apoptosis, and apoptosis is affected in FA cells, we studied the correlation between pADPRT and FA cells. We reinvestigated the previously reported lack of pADPRT activity in fibroblasts from patients with Fanconi anemia. Here we describe the role of the lower redox potential of FA cells and demonstrate that this is an efficient strategy in the prevention of cell death due to the lack of energy under oxidative stress. This strategy is advantageous for the cells under the nonreplicative condition of confluency in which the risk of mutation is low and the prevention of apoptosis permits cell survival. pADPRT is not diminished to the same extent in all complementation groups of FA. It is prominent in FANCA, FANCG and FANCF cells, indicating that these genes control pADPRT diminution. Our experiments suggest that the pADPRT level is linked with the oxidoreduction reactions seen in FA. Copyright © 2003 by Walter de Gruyter GmbH & Co. KG Biochemistry nationallicence Molecular biology nationallicence Cellular biology nationallicence Ramirez M.H. aut Adelfalk C. aut Kontou M. aut Hirsch-Kauffmann M. aut Schweiger M. aut Biological Chemistry Walter de Gruyter 384/1(2003-01-27), 169-174 1431-6730 384:1<169 2003 384 bchm https://doi.org/10.1515/BC.2003.018 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1515/BC.2003.018 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ramirez M.H. aut NATIONALLICENCE 700 1- Adelfalk C. aut NATIONALLICENCE 700 1- Kontou M. aut NATIONALLICENCE 700 1- Hirsch-Kauffmann M. aut NATIONALLICENCE 700 1- Schweiger M. aut NATIONALLICENCE 773 0- Biological Chemistry Walter de Gruyter 384/1(2003-01-27), 169-174 1431-6730 384:1<169 2003 384 bchm CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter