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Trametinib was maintained in nano-composite treated cells

Author: Lisa Feng
by Lisa Feng
Posted: Dec 11, 2013

Its role in trafficking and homeostasis of iron, transferrin and its receptors play a crucial role in the cancer development. TfR and TfR precursor expression were implicated as biomarkers for early-stage ovarian cancer diagnosis ; TfR standing has important diagnostic and staging benefits when combined with other biomarkers including CA 125. TfR1 has been shown to be expressed in almost all cell types, but-its up-regulation in many different cancer cell lines, causes it to be an attractive molecular target for novel ovarian cancer therapeutics.

Increased TfR1 expression also correlates with low pgpmediated resistance to doxorubicin, and a drug used to over come pgp resistance was also found to down regulate TfR1 expression in a drug resistant cell line.. Although it has been mentioned that Tf circulation in cells with TfR1 only occurs in tubulovesicular endosomes, cells co expressing TfRs 1 and 2 also accumulate Tf in multivesicular bodies as well as within a reticular system inside the trans Golgi network, a spot where clathrin localizes and receptor recycling is caused. The importance of those differences in endosome distribution pattern in both ovarian cancer cell lines is unknown at present.

It is possible that these variations in endosome processing additionally donate to drug resistance in A2780/AD cells, beyond the survival advantage conferred by pgp over-expression. Microscopy and flow cytometry revealed improved Tf usage by nanocomposite treated cells in this study. When co therapy was done, an important overlap within the doxorubicin and fluorescently tagged Tf indicators was within cytoplasm, in endocytic vesicles along with trans and MVBs Golgi apparatus. None the less, we show that improved Tf uptake remains completely determined by CME.

Tf usage by either cell line was entirely eliminated by hypertonic therapy and this response was maintained in nano-composite treated cells. Increased uptake of Tf at 2h imply that this change isn't dependent on changes in TfR appearance but rather on modulation of CME and/or trans Golgi activity. There has been several findings in the recent literature indicating that nano-particle uptake make a difference the cytoskeleton and focal adhesion points. Trametinib manufacturer

Such cytoskeleton modulation could lead to diminished exocytosis or else change vesicular trafficking. Consequently, it might be possible to use nanoparticles to increase the uptake of other chemo or nano therapeutics that count on endocytosis. More exclusively, distribution of nanotherapeutics focused by Tf may be improved by co therapy with DNCs.

About the Author

Norfolk-born Lisa Feng interests includes Ivacaftor and Trametinib karate, jigsaw puzzles. And finally, she is interested in going on a vacation and checking out new places as for instance Brugg.

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Author: Lisa Feng

Lisa Feng

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United States

Member since: Nov 14, 2013
Published articles: 20

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