Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2003 Oct 1;63(19):6187-94.

Effects of oligonucleotide N3'-->P5' thio-phosphoramidate (GRN163) targeting telomerase RNA in human multiple myeloma cells

Masaharu Akiyama  1 , Teru Hideshima, Masood A Shammas, Toshiaki Hayashi, Makoto Hamasaki, Yu-Tzu Tai, Paul Richardson, Sergei Gryaznov, Nikhil C Munshi, Kenneth C Anderson
Affiliations
  • PMID: 14559802

Effects of oligonucleotide N3'-->P5' thio-phosphoramidate (GRN163) targeting telomerase RNA in human multiple myeloma cells

Masaharu Akiyama et al. Cancer Res. .

Retraction in

Abstract

Telomeres are specialized nucleoprotein complexes that protect against fusion and degradation of linear chromosomes. Critical shortening of telomeres leads to irreversible cessation of cell division, whereas telomerase elongates telomere sequences to compensate for losses that occur with each round of DNA replication. Continued proliferation of tumor cells requires this enzyme to maintain chromosomal stability and to counteract the cellular mitotic clock. In this study, we evaluated the effect of oligonucleotide N3'-->P5' thio-phosphoramidate (NP), which targets template RNA component, in human multiple myeloma (MM) cell lines and patient MM cells. Fluorescein staining at 24 h confirmed NP uptake in 84.7 and 86.1% of MM.1S cells and MM patient cells, respectively, without any transfection enhancer. High transfection efficiency was observed into both CD138(+) and CD138(-) MM patient cells. Match NP (7S), but not mismatch NP (30S), inhibited telomerase activity in MM.1S cells, U266 cells, and RPMI 8226 cells, as well as in patient MM cells. Moreover, 7S inhibited cytokine-induced telomerase activity in MM.1S cells. 7S treatment-induced progressive telomere shortening was associated with growth inhibition and cell death in MM.1S cells with short telomeres (2.5 kb), but not in U266 cells with long telomeres (9.0 kb), at 56 days of culture. Progressive telomere shortening leading to growth inhibition and cell death in MM.1S cells was associated with up-regulation of p21 and phosphorylation of p53 (Ser-15). These studies, therefore, identify the molecular sequelae of NP oligonucleotide (GRN163) against human telomerase RNA component as a telomerase inhibitor and provide the rationale for the development of telomerase-targeted therapies to improve patient outcome in MM.

PubMed Disclaimer

Similar articles

See all similar articles

Cited by

See all "Cited by" articles

Publication types

MeSH terms

LinkOut - more resources