Needs and use of drug information sources in community pharmacies: a questionnaire based survey in German-speaking Switzerland

Methods: Postal survey to a random sample of 223 (26% out of 859) community pharmacies from the German-speaking part of Switzerland. The 48-item questionnaires were processed automatically with the Cardiff TELEform®-Software. In addition, a telephone-survey to a random sample of 20 non-responders was performed in order to test for non-response bias. Results: A total of 108 pharmacists (response rate 48%) reported that the official Swiss drug reference book is still the most popular source of drug information used to solve all kinds of drug related problems. The Internet as a source of drug information is of minor importance, even though 88% of the pharmacies have Internet access. Deficits in drug information were reported for paediatrics, phytotherapy, drugs during pregnancy/lactation and for therapy guidelines. According to 35% of the pharmacists, the importance of offering drug information to customers will increase in the future. Most of the pharmacists are not afraid that Internet pharmacies would replace them. Conclusions: The results show that the majority of the community pharmacists are only partially satisfied with the sources of drug information currently available. The Internet still plays a minor role for solving drug-related problems in daily practice, even though the available infrastructure makes the community pharmacies able to use the Internet more frequently. The pharmacists need more websites tailored to their needs. The pharmacists have clear visions about possible future developments. They do, however, have to adopt quickly to the changes ahead in order to remain competitiv

Imaging by Atomic Force Microscopy of the Plasma Membrane of Prestin-Transfected Chinese Hamster Ovary Cells

The high sensitivity of mammalian hearing is achieved by amplification of the motion of the cochlear partition. This cochlear amplification is thought to be generated by the elongation and contraction of outer hair cells (OHCs) in response to acoustical stimulation. This motility is made possible by a membrane protein embedded in the lateral membrane of OHCs. Although a fructose transporter, GLUT-5, was initially proposed to be this protein, a later study identified the gene of the motor protein distributed throughout the OHC plasma membrane. This protein has been named “prestin.” However, although previous morphological studies by electron microscopy and atomic force microscopy (AFM) found the lateral wall of OHCs to be covered with 10-nm particles, believed to be motor proteins, it is unknown whether such particles consist only of prestin or are a complex of GLUT-5 and prestin molecules. To determine if the 10-nm particles are indeed constituted only of prestin, plasma membranes of prestin-transfected and untransfected Chinese hamster ovary (CHO) cells, which do not express GLUT-5, were observed by AFM. First, the cells attached to a substrate were sonicated so that only the plasma membrane remained on the substrate. The cytoplasmic face of the cell was observed by the tapping mode of the AFM in liquid. As a result, particle-like structures were recognized on the plasma membranes of both the prestin-transfected and untransfected CHO cells. Comparison of the difference in the frequency distribution of these structures between those two cells showed approximately 75% of the particle-like structures with a diameter of 8–12 nm in the prestin-transfected CHO cells to be possibly constituted only by prestin molecules. Our data suggest that the densely packed 10-nm particles observed on the OHC lateral wall are likely to be constituted only of prestin molecules