Franke H, Streckert J, Bitz A, Goeke J, et al. (2005b):

The authors have previously reported results of experiments, in which porcine brain capillary endothelial cells (PBEC) were exposed to radiofrequency radiation (RFR) using a GSM signal at 1800 MHz (see Franke et al., 2005a).

In this paper they report a series of experiments, in which the same cells were exposed to a UTMS signal (1966 MHz). They measured transendothelial electrical resistance (TEER), barrier tightness, transport behaviour, and distribution of tight-junction proteins. They found no effect of the RFR, compared to sham exposure in double-blind conditions, at a SAR of 1.8 W/kg. The substances that were used to test permeability were sucrose, bovine serum albumin, glucose, L-alanine, and L-leucine. The tight-junction proteins tested were occludin and ZO1. The localisation and integrity of the proteins were not affected.

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