منابع مشابه
Control of G1 arrest after DNA damage.
The temporal relationship between DNA damage and DNA replication may be critical in determining whether the genetic changes necessary for cellular transformation occur after DNA damage. Recent characterization of the mechanisms responsible for alterations in cell-cycle progression after DNA damage in our laboratory have implicated the p53 (tumor suppressor) protein in the G1 arrest that occurs ...
متن کاملThe role of MYCN in the failure of MYCN amplified neuroblastoma cell lines to G1 arrest after DNA damage.
We previously reported that 3 p53 wild type (wt) MYCN amplified (MNA) neuroblastoma cell lines failed to G1 arrest after DNA damage despite induction of p53, p21(WAF1) and MDM2. We hypothesised that this was due to high MYCN expression. p53 responses to DNA damage were examined in an additional 13 p53 wt neuroblastoma cell lines. MNA was significantly associated with a failure to G1 arrest afte...
متن کاملRobust G1 checkpoint arrest in budding yeast: dependence on DNA damage signaling and repair.
Although most eukaryotes can arrest in G1 after ionizing radiation, the existence or significance of a G1 checkpoint in S. cerevisiae has been challenged. Previous studies of G1 response to chemical mutagens, X-ray or UV irradiation indicate that the delay before replication is transient and may reflect a strong intra-S-phase checkpoint. We examined the yeast response to double-stranded breaks ...
متن کاملp53 activates G1 checkpoint following DNA damage by doxorubicin during transient mitotic arrest
Recovery from DNA damage is critical for cell survival. The serious damage is not able to be repaired during checkpoint and finally induces cell death to prevent abnormal cell growth. In this study, we demonstrated that 8N-DNA contents are accumulated via re-replication during prolonged recovery period containing serious DNA damage in mitotic cells. During the incubation for recovery, a mitotic...
متن کاملDNA damage triggers a prolonged p53-dependent G1 arrest and long-term induction of Cip1 in normal human fibroblasts.
The tumor suppressor p53 is a cell cycle checkpoint protein that contributes to the preservation of genetic stability by mediating either a G1 arrest or apoptosis in response to DNA damage. Recent reports suggest that p53 causes growth arrest through transcriptional activation of the cyclin-dependent kinase (Cdk)-inhibitor Cip1. Here, we characterize the p53-dependent G1 arrest in several norma...
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ژورنال
عنوان ژورنال: Environmental Health Perspectives
سال: 1993
ISSN: 0091-6765,1552-9924
DOI: 10.1289/ehp.93101s555