Mastology Research Institute

Baton Rouge, LA, United States

Mastology Research Institute

Baton Rouge, LA, United States
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Jiang X.-P.,Mastology Research Institute | Yang D.C.,Mastology Research Institute | Elliott R.L.,Mastology Research Institute | Head J.F.,Mastology Research Institute
Anticancer Research | Year: 2011

Interleukin-6 (IL-6) plays an important role in the neoplastic process through its action on cancer cell adhesion, motility, proliferation, tumor-specific antigen expression, and thrombopoiesis. IL-6 exerts its activity by binding to a high affinity receptor complex consisting of two membrane glycoproteins: the 80 kDa IL-6 a-receptor subunit (IL-6R) and the 130 kDa signal-transducing protein (GP130). In the present study, MCF-7 breast cancer cells were cultured with human IL-6 and IL-6 soluble receptor (sIL-6R). MCF-7 cells were also treated with either antibodies specific to human IL-6 and IL-6R, or synthetic antisense oligodeoxynucleotides (ODNs) targeted to IL-6 and IL-6R genes. Cell growth was measured, and it was found that human IL-6 and sIL-6R did not significantly increase the proliferation of MCF-7 cells. When IL-6 produced by the MCF-7 cells was bound by rabbit anti-human IL-6 antibody, there was a significant dose-dependent inhibition of cell proliferation. IL-6 and IL-6R antisense ODNs caused a marked and specific decrease in IL-6 and IL-6R mRNA and proteins, respectively. Both IL-6 and IL-6R antisense ODNs significantly inhibited the proliferation of MCF-7 cells, but the inhibitory effect of IL-6R antisense ODN was greater than that of IL-6 antisense ODN (IC50: IL-6R: 1 μM; IL-6: 5 μM, 72-hour incubation). Addition of exogenous IL-6 partially reversed the growth inhibition caused by IL-6 antisense ODN but not the growth inhibition caused by IL-6R antisense ODN. In conclusion, IL-6 plays an important role in maintaining the growth of MCF-7 breast cancer cells. These results suggest careful modulation of IL-6 and IL-6R expression of cells as a potential approach for breast cancer therapy.


PubMed | Mastology Research Institute
Type: Journal Article | Journal: Anticancer research | Year: 2011

Interleukin-6 (IL-6) plays an important role in the neoplastic process through its action on cancer cell adhesion, motility, proliferation, tumor-specific antigen expression, and thrombopoiesis. IL-6 exerts its activity by binding to a high affinity receptor complex consisting of two membrane glycoproteins: the 80 kDa IL-6 a-receptor subunit (IL-6R) and the 130 kDa signal-transducing protein (GP130). In the present study, MCF-7 breast cancer cells were cultured with human IL-6 and IL-6 soluble receptor (sIL-6R). MCF-7 cells were also treated with either antibodies specific to human IL-6 and IL-6R, or synthetic antisense oligodeoxynucleotides (ODNs) targeted to IL-6 and IL-6R genes. Cell growth was measured, and it was found that human IL-6 and sIL-6R did not significantly increase the proliferation of MCF-7 cells. When IL-6 produced by the MCF-7 cells was bound by rabbit anti-human IL-6 antibody, there was a significant dose-dependent inhibition of cell proliferation. IL-6 and IL-6R antisense ODNs caused a marked and specific decrease in IL-6 and IL-6R mRNA and proteins, respectively. Both IL-6 and IL-6R antisense ODNs significantly inhibited the proliferation of MCF-7 cells, but the inhibitory effect of IL-6R antisense ODN was greater than that of IL-6 antisense ODN (IC: IL-6R: 1 M; IL-6: 5 M, 72-hour incubation). Addition of exogenous IL-6 partially reversed the growth inhibition caused by IL-6 antisense ODN but not the growth inhibition caused by IL-6R antisense ODN. In conclusion, IL-6 plays an important role in maintaining the growth of MCF-7 breast cancer cells. These results suggest careful modulation of IL-6 and IL-6R expression of cells as a potential approach for breast cancer therapy.


PubMed | Mastology Research Institute
Type: Journal Article | Journal: Journal of clinical oncology : official journal of the American Society of Clinical Oncology | Year: 2016

10616 Iron is required for the activity of ribonucleotide reductase and synthesis of DNA. Cellular surface transferrin receptors (TfR) are the principal transport protein for iron into cells. It has been reported that inhibition of TfR gene expression leads to the suppression of tumor cell growth in cell culture. In the present study, an antisense oligonucleotide targeted to the transferrin receptor gene was used to treat 4T1 mammary adenocarinoma in cell culture and a mouse model. The cytotoxicity of a 24-mer TfR antisense oligonucleotide was determined by

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