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Open AccessJournal ArticleDOI

Actions of human telomerase beyond telomeres.

Yu-Sheng Cong, +1 more
- 01 Jul 2008 - 
- Vol. 18, Iss: 7, pp 725-732
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TLDR
This review will provide an update on the extracurricular activities of telomerase in apoptosis, DNA repair, stem cell function, and in the regulation of gene expression.
Abstract
Telomerase has fundamental roles in bypassing cellular aging and in cancer progression by maintaining telomere homeostasis and integrity. However, recent studies have led some investigators to suggest novel biochemical properties of telomerase in several essential cell signaling pathways without apparent involvement of its well established function in telomere maintenance. These observations may further enhance our understanding of the molecular actions of telomerase in aging and cancer. This review will provide an update on the extracurricular activities of telomerase in apoptosis, DNA repair, stem cell function, and in the regulation of gene expression.

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Hallmarks of cancer: the next generation.

TL;DR: Recognition of the widespread applicability of these concepts will increasingly affect the development of new means to treat human cancer.
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Telomeric and extra-telomeric roles for telomerase and the telomere-binding proteins

TL;DR: The role of telomeric proteins in cancer and ageing through modulating telomere length and protection, as well as regulating gene expression by binding to non-telomeric sites is discussed.
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Axis of ageing: telomeres, p53 and mitochondria.

TL;DR: A molecular circuit that directly links DNA damage to compromised mitochondrial biogenesis and function via p53 may account for both organ decline and disease development associated with advanced age and could illuminate a path for the development of relevant therapeutics.
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Telomerase reverse transcriptase promotes epithelial–mesenchymal transition and stem cell-like traits in cancer cells

TL;DR: Targeting hTERT may prevent cancer progression by inhibiting EMT and CSCs using gastric cancer as a model and demonstrates the in vivo stimulation of h TERT on cancer cell colonization.
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hTERT overexpression alleviates intracellular ROS production, improves mitochondrial function, and inhibits ROS-mediated apoptosis in cancer cells

TL;DR: It is shown that hTERT overexpression not only reduces the basal cellular reactive oxygen species (ROS) levels but also inhibits endogenous ROS production in response to stimuli that induce intracellular ROS generation, and in doing so endowing cancer cells with the ability to evade death stimuli.
References
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Journal ArticleDOI

Induction of Pluripotent Stem Cells from Adult Human Fibroblasts by Defined Factors

TL;DR: It is demonstrated that iPS cells can be generated from adult human fibroblasts with the same four factors: Oct3/4, Sox2, Klf4, and c-Myc.
Journal ArticleDOI

Induced Pluripotent Stem Cell Lines Derived from Human Somatic Cells

TL;DR: This article showed that OCT4, SOX2, NANOG, and LIN28 factors are sufficient to reprogram human somatic cells to pluripotent stem cells that exhibit the essential characteristics of embryonic stem (ES) cells.
Journal ArticleDOI

Extension of life-span by introduction of telomerase into normal human cells

TL;DR: In this article, two telomerase-negative normal human cell types, retinal pigment epithelial cells and foreskin fibroblasts, were transfected with vectors encoding the human telomere catalytic subunit.
Journal ArticleDOI

Reprogramming of human somatic cells to pluripotency with defined factors

TL;DR: The data demonstrate that defined factors can reprogramme human cells to pluripotency, and establish a method whereby patient-specific cells might be established in culture.
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