NDLI: Temperature and cholera toxin B are factors that influence formation of membrane nanotubes in RT4 and T24 urothelial cancer cell lines

Content Provider	PubMed Central
Author	Doron, Kabaso Lokar, Maruša Kralj-iglič, Veronika Peter, Veranič Iglič, Aleš
Copyright Year	2011
Abstract	The growth of membrane nanotubes is crucial for intercellular communication in both normal development and pathological conditions. Therefore, identifying factors that influence their stability and formation are important for both basic research and in development of potential treatments of pathological states. Here we investigate the effect of cholera toxin B (CTB) and temperature on two pathological model systems: urothelial cell line RT4, as a model system of a benign tumor, and urothelial cell line T24, as a model system of a metastatic tumor. In particular, the number of intercellular membrane nanotubes (ICNs; ie, membrane nanotubes that bridge neighboring cells) was counted. In comparison with RT4 cells, we reveal a significantly higher number in the density of ICNs in T24 cells not derived from RT4 without treatments (P = 0.005), after 20 minutes at room temperature (P = 0.0007), and following CTB treatment (P = 0.000025). The binding of CTB to GM1–lipid complexes in membrane exvaginations or tips of membrane nanotubes may reduce the positive spontaneous (intrinsic) curvature of GM1–lipid complexes, which may lead to lipid mediated attractive interactions between CTB–GM1–lipid complexes, their aggregation and consequent formation of enlarged spherical tips of nanotubes. The binding of CTB to GM1 molecules in the outer membrane leaflet of membrane exvaginations and tips of membrane nanotubes may also increase the area difference between the two leaflets and in this way facilitate the growth of membrane nanotubes.
Related Links	http://dx.doi.org/10.2147/ijn.s16982
Ending Page	509
Starting Page	495
File Format	PDF
ISSN	11782013
e-ISSN	11782013
Journal	International Journal of Nanomedicine
Volume Number	6
Language	English
Publisher	Dove Medical Press
Publisher Date	2011-03-01
Access Restriction	Open
Rights Holder	Dove Medical Press
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Organic Chemistry Medicine Drug Discovery Biomaterials Biophysics Bioengineering Pharmaceutical Science

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