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The giant fiber system (GFS) is a simple network of neurons that mediates visually elicited escape behavior in Drosophila. The giant fiber (GF), the major component of the system, is a large, descending interneuron that relays visual stimuli to the motoneurons that innervate the tergotrochanteral jump muscle (TTM) and dorsal longitudinal flight muscles(More)
In most multicellular organisms direct cell-cell communication is mediated by the intercellular channels of gap junctions. These channels allow the exchange of ions and molecules that are believed to be essential for cell signalling during development and in some differentiated tissues. Proteins called connexins, which are products of a multigene family,(More)
Members of the innexin protein family are structural components of invertebrate gap junctions and are analogous to vertebrate connexins. Here we investigate two Drosophila innexin genes, Dm-inx2 and Dm-inx3 and show that they are expressed in overlapping domains throughout embryogenesis, most notably in epidermal cells bordering each segment. We also(More)
Airway inflammation is an important component of cystic fibrosis (CF) lung disease. To determine whether this begins early in the illness, before the onset of infection, we examined bronchoalveolar lavage (BAL) fluid from 46 newly diagnosed infants with CF under the age of 6 mo identified by a neonatal screening program. These infants were divided into(More)
Little is known about the protective role of inflammatory processes in modulating lipid metabolism in infection. Here we report an intimate link between the innate immune response to infection and regulation of the sterol metabolic network characterized by down-regulation of sterol biosynthesis by an interferon regulatory loop mechanism. In time-series(More)
We tested the hypothesis that the composition of bronchial surfactant is normal in infants with cystic fibrosis (CF) in the absence of active lung disease but that it is altered by lower respiratory tract infection and inflammation. We examined the total phospholipid (PL), disaturated phospholipid (DSP), surfactant protein-A (SP-A), surfactant protein B(More)
This paper reports on the ESPRIT project MELISSA (Methods and Tools for Natural-Language Interfacing with Standard Software Applications) ~. MELISSA aims at developing the technology and tools enabling end users to interface with computer applications, using natural language (NL), and to obtain a pre-competitive product validated in selected end-user(More)
Ciliary neurotrophic factor (CNTF) supports the survival of a wide variety of neuronal cells in culture. To characterise the receptor(s) mediating the biological responses of CNTF we measured the binding of radiolabelled CNTF to chick sympathetic neurons and human neuroblastoma cells. Two distinct CNTF-binding sites with high and low affinity for the ligand(More)
The anticonvulsant drug, sodium valproate, enhanced total activity of glutamine synthetase in cortical and cerebellar homogenates of the rat at concentrations of 25-50 mM, without significantly altering substrate affinity. This effect was due to a selective increase in the Vmax and substrate affinity of the enzyme in the particulate fraction. At the same(More)