ArticlePloS one2013
Increased cytoplasmic localization of p27(kip1) and its modulation of RhoA activity during progression of chronic myeloid leukemia.
Article in PloS one, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 12 citations in OpenAlex.
- Nuclear-cytoplasmic Shuttling in Chronic Myeloid Leukemia: Implications in Leukemia Maintenance and Therapy.Cells · 2019Review
- The prognostic potential of coilin in association with p27 expression in pediatric acute lymphoblastic leukemia for disease relapse.Cancer cell international · 2018Article
- CDKIs p18(INK4c) and p57(Kip2) are involved in quiescence of CML leukemic stem cells after treatment with TKI.Cell cycle (Georgetown, Tex.) · 2016Article
- Article
- Differential regulation of MCM7 and its intronic miRNA cluster miR-106b-25 during megakaryopoiesis induced polyploidy.RNA biology · 2014Article
Corrections and comments
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Authors and funding
5 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The role of p27(kip1) in Chronic Myeloid Leukemia (CML) has been well studied in relation to its function as a cell cycle inhibitor. However, its cytoplasmic function especially in CML remains to be seen. We studied the localization of p27(kip1) and its function during the progression of CML from chronic to blast phase. Our investigations revealed an increased localization of p27(kip1) in the cytoplasm of CD34(+) cells in the blast phase compared to chronic phase. Cytoplasmic p27(kip1) was found to modulate RhoA activity in CD34(+) stem and progenitor cells. Further, RhoA activity was shown to be dependent on cytoplasmic p27(kip1) which in turn was dependent on p210(Bcr-Abl) kinase activity. Interestingly, RhoA activity was observed to affect cell survival in the presence of imatinib through the SAPK/JNK pathway. Accordingly, inhibition of SAPK/JNK pathway using SP600125 increased apoptosis of K562 cells in presence of imatinib. Our results, for the first time, thus reveal a crucial link between cytoplasmic p27(kip1), RhoA activity and SAPK/JNK signalling. To this effect we observed a correlation between increased cytoplasmic p27(kip1), increased RhoA protein levels, decreased RhoA-GTP levels and increased SAPK/JNK phosphorylation in blast phase CD34(+) cells compared to chronic phase CD34(+) cells.
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