Abstract
Background: Considerable progress has been made to understand the association between lifestyle and diet in cancer initiation and promotion. Because excessive glucose consumption is a key metabolic hallmark of cancer cells, glucose restriction (GR) decreases the proliferation, and promotes the differentiation and transformation of cancer cells to quiescent cells. The immortality of cancerous cells is largely assured by telomerase, which is an interesting target for inhibition by BIBR 1532. In this study, we investigated the effect of GR on telomerase activity and on the efficacy of its inhibition by BIBR 1532.Methods: Breast cancer MDA-MB 231 and MCF-7 cells were cultured in DMEM (Dulbecco's modified eagle's media) with 0, 1 or 4.5 g/l of glucose. The telomerase activity was measured via quantitative Real-Time PCR, and the two telomerase subunits were semi-quantified by RT-PCR. Proliferation test and mitochondrial metabolism were assessed via tetrazolium salt reduction and cell counts; apoptosis was assessed via caspase-3 quantification and flow cytometry. Results: A decrease in the telomerase activity of more than 75% was associated with a significant reduction in the mRNA expression of its catalytic subunit hTERT (Reverse Transcriptase) and a decrease in the mitochondrial metabolism by more than 80% under restricted glucose conditions. In addition, GR increased the effect of BIBR 1532. Glucose deprivation induces apoptosis via BIBR 1532-mediated telomerase inhibition in triple negative breast cancer cells, as assessed by caspase-3 measurements and Annexin analysis.Conclusions: Taken together, our results suggest that the effect of BIBR 1532 is potentiated by GR to induce triple negative breast cancer cell death.
| Original language | English |
|---|---|
| Article number | 60 |
| Journal | Cancer Cell International |
| Volume | 14 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 4 Jul 2014 |
| Externally published | Yes |
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Keywords
- BIBR 1532
- Breast cancer
- Cancer
- Glucose restriction
- Telomerase
ASJC Scopus subject areas
- Cancer Research
- Oncology
- Genetics
Cite this
Glucose restriction decreases telomerase activity and enhances its inhibitor response on breast cancer cells : Possible extra-telomerase role of BIBR 1532. / Wardi, Layal; Alaaeddine, Nada; Raad, Issam; Sarkis, Riad; Serhal, Rim; Abi Khalil, Charbel; Hilal, George.
In: Cancer Cell International, Vol. 14, No. 1, 60, 04.07.2014.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Glucose restriction decreases telomerase activity and enhances its inhibitor response on breast cancer cells
T2 - Possible extra-telomerase role of BIBR 1532
AU - Wardi, Layal
AU - Alaaeddine, Nada
AU - Raad, Issam
AU - Sarkis, Riad
AU - Serhal, Rim
AU - Abi Khalil, Charbel
AU - Hilal, George
PY - 2014/7/4
Y1 - 2014/7/4
N2 - Background: Considerable progress has been made to understand the association between lifestyle and diet in cancer initiation and promotion. Because excessive glucose consumption is a key metabolic hallmark of cancer cells, glucose restriction (GR) decreases the proliferation, and promotes the differentiation and transformation of cancer cells to quiescent cells. The immortality of cancerous cells is largely assured by telomerase, which is an interesting target for inhibition by BIBR 1532. In this study, we investigated the effect of GR on telomerase activity and on the efficacy of its inhibition by BIBR 1532.Methods: Breast cancer MDA-MB 231 and MCF-7 cells were cultured in DMEM (Dulbecco's modified eagle's media) with 0, 1 or 4.5 g/l of glucose. The telomerase activity was measured via quantitative Real-Time PCR, and the two telomerase subunits were semi-quantified by RT-PCR. Proliferation test and mitochondrial metabolism were assessed via tetrazolium salt reduction and cell counts; apoptosis was assessed via caspase-3 quantification and flow cytometry. Results: A decrease in the telomerase activity of more than 75% was associated with a significant reduction in the mRNA expression of its catalytic subunit hTERT (Reverse Transcriptase) and a decrease in the mitochondrial metabolism by more than 80% under restricted glucose conditions. In addition, GR increased the effect of BIBR 1532. Glucose deprivation induces apoptosis via BIBR 1532-mediated telomerase inhibition in triple negative breast cancer cells, as assessed by caspase-3 measurements and Annexin analysis.Conclusions: Taken together, our results suggest that the effect of BIBR 1532 is potentiated by GR to induce triple negative breast cancer cell death.
AB - Background: Considerable progress has been made to understand the association between lifestyle and diet in cancer initiation and promotion. Because excessive glucose consumption is a key metabolic hallmark of cancer cells, glucose restriction (GR) decreases the proliferation, and promotes the differentiation and transformation of cancer cells to quiescent cells. The immortality of cancerous cells is largely assured by telomerase, which is an interesting target for inhibition by BIBR 1532. In this study, we investigated the effect of GR on telomerase activity and on the efficacy of its inhibition by BIBR 1532.Methods: Breast cancer MDA-MB 231 and MCF-7 cells were cultured in DMEM (Dulbecco's modified eagle's media) with 0, 1 or 4.5 g/l of glucose. The telomerase activity was measured via quantitative Real-Time PCR, and the two telomerase subunits were semi-quantified by RT-PCR. Proliferation test and mitochondrial metabolism were assessed via tetrazolium salt reduction and cell counts; apoptosis was assessed via caspase-3 quantification and flow cytometry. Results: A decrease in the telomerase activity of more than 75% was associated with a significant reduction in the mRNA expression of its catalytic subunit hTERT (Reverse Transcriptase) and a decrease in the mitochondrial metabolism by more than 80% under restricted glucose conditions. In addition, GR increased the effect of BIBR 1532. Glucose deprivation induces apoptosis via BIBR 1532-mediated telomerase inhibition in triple negative breast cancer cells, as assessed by caspase-3 measurements and Annexin analysis.Conclusions: Taken together, our results suggest that the effect of BIBR 1532 is potentiated by GR to induce triple negative breast cancer cell death.
KW - BIBR 1532
KW - Breast cancer
KW - Cancer
KW - Glucose restriction
KW - Telomerase
UR - http://www.scopus.com/inward/record.url?scp=84905378600&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84905378600&partnerID=8YFLogxK
U2 - 10.1186/1475-2867-14-60
DO - 10.1186/1475-2867-14-60
M3 - Article
VL - 14
JO - Cancer Cell International
JF - Cancer Cell International
SN - 1475-2867
IS - 1
M1 - 60
ER -