Quantitating the concentration of Py-Im polyamide-fluorescein conjugates in live cells.

Abstract:

:Quantitative fluorescence-based methods have been developed to determine the nuclear concentration of polyamide-fluorescein conjugates in cell culture. Confocal laser scanning microscopy and flow cytometry techniques are utilized to plot calibration curves, from which the nuclear concentration can be interpolated. Upon treatment with polyamide, the concentration in the nucleus of live HeLa cells is calculated to be between 0.1 and 0.5microM, which is significantly lower than the 2microM dosage concentration. In contrast, the observed nuclear concentration in U251 cells is closer to the dosage concentration, indicating a cell line-specific increase in uptake for this class of compounds. Although confocal microscopy and flow cytometry generate disparate values, taken together these experiments suggest that the polyamide concentration inside the cell nucleus is lower than it is outside the cell.

journal_name

Bioorg Med Chem Lett

authors

Hsu CF,Dervan PB

doi

10.1016/j.bmcl.2008.05.063

subject

Has Abstract

pub_date

2008-11-15 00:00:00

pages

5851-5

issue

22

eissn

0960-894X

issn

1464-3405

pii

S0960-894X(08)00560-X

journal_volume

18

pub_type

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