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- W2069373412 endingPage "286" @default.
- W2069373412 startingPage "275" @default.
- W2069373412 abstract "Regulation of gene expression is a fundamental step in cellular physiology as abnormalities in this process may lead to de-regulated growth and cancer. Translation of mRNA is mainly regulated at the rate-limiting initiation step, where many eukaryotic initiation factors (eIFs) are involved. The largest and most complex initiation factor is eIF3 which plays a role in translational regulation, cell growth and cancer. The largest subunit of eIF3 is eIF3a, although it is not required for the general function of eIF3 in translation initiation. However, eIF3a may play a role as a regulator of a subset of mRNAs and has been demonstrated to regulate the expression of p27(kip1), tyrosinated α-tubulin and ribonucleotide reductase M2 subunit. These molecules have a pivotal role in the regulation of the cell cycle. Moreover, the eIF3a mRNA is ubiquitously expressed in all tissues at different levels and is found elevated in a number of cancer types. eIF3a can modulate the cell cycle and may be a translational regulator for proteins important for entrance into S phase. The expression of eIF3a is decreased in differentiated cells in culture and the suppression of eIF3a expression can reverse the malignant phenotype and change the sensitivity of cells to cell cycle modulators. However, the role of eIF3a in cancer is still unclear. In fact, some studies have identified eIF3a to be involved in cancer development, while other results indicate that it could provide protection against evolution into higher malignancy. Together, these findings highlight the tricky and interesting nature of eIF3a." @default.
- W2069373412 created "2016-06-24" @default.
- W2069373412 creator A5054660253 @default.
- W2069373412 creator A5061763563 @default.
- W2069373412 creator A5082316302 @default.
- W2069373412 date "2010-12-01" @default.
- W2069373412 modified "2023-10-13" @default.
- W2069373412 title "The translational regulator eIF3a: The tricky eIF3 subunit!" @default.
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