@article{AschenbrennerWalz1998,
  author    = {Aschenbrenner, Stefan and Walz, Bernd},
  title     = {Pleated septate junctions in leech photoreceptors : ultrastructure, arrangement of septa, gate and fence functions},
  year      = {1998},
  language  = {en}
}
@article{AstMuellerFlehretal.2011,
  author    = {Ast, Sandra and M{\"u}ller, Holger and Flehr, Roman and Klamroth, Tillmann and Walz, Bernd and Holdt, Hans-J{\"u}rgen},
  title     = {High Na+ and K+-induced fluorescence enhancement of a pi-conjugated phenylaza-18-crown-6-triazol-substituted coumarin fluoroionophore},
  series = {Chemical communications},
  volume    = {47},
  journal   = {Chemical communications},
  number    = {16},
  publisher = {Royal Society of Chemistry},
  address   = {Cambridge},
  issn      = {1359-7345},
  doi       = {10.1039/c0cc04370b},
  pages     = {4685 -- 4687},
  year      = {2011},
  abstract  = {The new pi-conjugated 1,2,3-triazol-1,4-diyl fluoroionophore 1 generated via Cu(I) catalyzed [3 + 2] cycloaddition shows high fluorescence enhancement factors (FEF) in the presence of Na+ (FEF = 58) and K+ (FEF = 27) in MeCN and high selectivity towards K+ under simulated physiological conditions (160 mM K+ or Na+, respectively) with a FEF of 2.5 for K+.},
  language  = {en}
}
@article{BaumannArltRoemmlingetal.2000,
  author    = {Baumann, Otto and Arlt, Kathleen and R{\"o}mmling, Katja and Goller, Helmut and Walz, Bernd},
  title     = {Characterization of an extremely motile cellular network in the rotifer Asplanchna spp. : structure, kinetics, and cytoskeleton},
  year      = {2000},
  language  = {en}
}
@article{BaumannArltRoemmlingetal.2000,
  author    = {Baumann, Otto and Arlt, Kathleen and R{\"o}mmling, Katja and Goller, Helmut and Walz, Bernd},
  title     = {Characterization of an extremely motile cellular network in the rotifer Asplanchna : Structure, kinetics and the cytoskeleton},
  year      = {2000},
  language  = {en}
}
@article{BaumannDamesKuehneletal.2002,
  author    = {Baumann, Otto and Dames, Petra and K{\"u}hnel, Dana and Walz, Bernd},
  title     = {Distribution of serotonergic and dopaminergic nerve fibers in the salivary gland complex of the cockroach Periplaneta americana},
  year      = {2002},
  language  = {en}
}
@article{BaumannKuehnelDamesetal.2004,
  author    = {Baumann, Otto and K{\"u}hnel, Dana and Dames, Petra and Walz, Bernd},
  title     = {Dopaminergic and serotonergic innervation of cockroach salivary glands : distribution and morphology of synapses and release sites},
  year      = {2004},
  abstract  = {The paired salivary glands in the cockroach are composed of acini with ion-transporting peripheral P-cells and protein-secreting central C-cells, and a duct system for the modification of the primary saliva. Secretory activity is controlled by serotonergic and dopaminergic neurons, whose axons form a dense plexus on the glands. The spatial relationship of release sites for serotonin and dopamine to the various cell types was determined by anti-synapsin immunofluorescence confocal microscopy and electron microscopy. Every C-cell apparently has only serotonergic synapses on its surface. Serotonergic and dopaminergic fibres on the acini have their release zones at a distance of similar to0.5 mum from the P-cells. Nerves between acinar lobules may serve as neurohaemal organs and contain abundant dopaminergic and few serotonergic release sites. Some dopaminergic and serotonergic release sites reside in the duct epithelium, the former throughout the duct system, the latter only in segments next to acini. These findings are consistent with the view that C-cells respond exclusively to serotonin, P-cells to serotonin and dopamine, and most duct cells only to dopamine. Moreover, the data suggest that C-cells are stimulated by serotonin released close to their surface, whereas P-cells and most duct cells are exposed to serotonin/dopamine liberated at some distance},
  language  = {en}
}
@misc{BaumannWalz2012,
  author    = {Baumann, Otto and Walz, Bernd},
  title     = {The blowfly salivary gland - A model system for analyzing the regulation of plasma membrane V-ATPase},
  series = {Journal of insect physiology},
  volume    = {58},
  journal   = {Journal of insect physiology},
  number    = {4},
  publisher = {Elsevier},
  address   = {Oxford},
  issn      = {0022-1910},
  doi       = {10.1016/j.jinsphys.2011.11.015},
  pages     = {450 -- 458},
  year      = {2012},
  abstract  = {Vacuolar H+-ATPases (V-ATPases) are heteromultimeric proteins that use the energy of ATP hydrolysis for the electrogenic transport of protons across membranes. They are common to all eukaryotic cells and are located in the plasma membrane or in membranes of acid organelles. In many insect epithelia, V-ATPase molecules reside in large numbers in the apical plasma membrane and create an electrochemical proton gradient that is used for the acidification or alkalinization of the extracellular space, the secretion or reabsorption of ions and fluids, the import of nutrients, and diverse other cellular activities. Here, we summarize our results on the functions and regulation of V-ATPase in the tubular salivary gland of the blowfly Calliphora vicina. In this gland, V-ATPase activity energizes the secretion of a KCl-rich saliva in response to the neurohormone serotonin (5-HT). Because of particular morphological and physiological features, the blowfly salivary glands are a superior and exemplary system for the analysis of the intracellular signaling pathways and mechanisms that modulate V-ATPase activity and solute transport in an insect epithelium.},
  language  = {en}
}
@article{BaumannWalz2001,
  author    = {Baumann, Otto and Walz, Bernd},
  title     = {The endoplasmic reticulum of animal cells and its organization into structural and functional domains},
  year      = {2001},
  language  = {en}
}
@misc{BlenauRotteKrachetal.2009,
  author    = {Blenau, Wolfgang and Rotte, Cathleen and Krach, Christian and Balfanz, Sabine and Baumann, Arnd and Walz, Bernd},
  title     = {Molecular characterization and localization of the first tyramine receptor of the American cockroach (Periplaneta americana)},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-44335},
  year      = {2009},
  abstract  = {The phenolamines octopamine and tyramine control, regulate, and modulate many physiological and behavioral processes in invertebrates. Vertebrates possess only small amounts of both substances, and thus, octopamine and tyramine, together with other biogenic amines, are referred to as "trace amines." Biogenic amines evoke cellular responses by activating G-protein-coupled receptors. We have isolated a complementary DNA (cDNA) that encodes a biogenic amine receptor from the American cockroach Periplaneta americana, viz., Peatyr1, which shares high sequence similarity to members of the invertebrate tyramine-receptor family. The PeaTYR1 receptor was stably expressed in human embryonic kidney (HEK) 293 cells, and its ligand response has been examined. Receptor activation with tyramine reduces adenylyl cyclase activity in a dose-dependent manner (EC50 350 nM). The inhibitory effect of tyramine is abolished by co-incubation with either yohimbine or chlorpromazine. Receptor expression has been investigated by reverse transcription polymerase chain reaction and immunocytochemistry. The mRNA is present in various tissues including brain, salivary glands, midgut, Malpighian tubules, and leg muscles. The effect of tyramine on salivary gland acinar cells has been investigated by intracellular recordings, which have revealed excitatory presynaptic actions of tyramine. This study marks the first comprehensive molecular, pharmacological, and functional characterization of a tyramine receptor in the cockroach.},
  language  = {en}
}
@misc{BlenauRotteWitteetal.2009,
  author    = {Blenau, Wolfgang and Rotte, Cathleen and Witte, Jeannine and Baumann, Otto and Walz, Bernd},
  title     = {Source, topography and excitatory effects of GABAergic innervation in cockroach salivary glands},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-44353},
  year      = {2009},
  abstract  = {Cockroach salivary glands are innervated by dopaminergic and serotonergic neurons. Both transmitters elicit saliva secretion. We studied the distribution pattern of neurons containing gamma-aminobutyric acid ( GABA) and their physiological role. Immunofluorescence revealed a GABA-immunoreactive axon that originates within the subesophageal ganglion at the salivary neuron 2 (SN2) and this extends within the salivary duct nerve towards the salivary gland. GABA-positive fibers form a network on most acinar lobules and a dense plexus in the interior of a minor fraction of acinar lobules. Co-staining with anti-synapsin revealed that some putative GABAergic terminals seem to make pre-synaptic contacts with GABA-negative release sites. Many putative GABAergic release sites are at some distance from other synapses and at distance from the acinar tissue. Intracellular recordings from isolated salivary glands have revealed that GABA does not affect the basolateral membrane potential of the acinar cells directly. When applied during salivary duct nerve stimulation, GABA enhances the electrical response of the acinar cells and increases the rates of fluid and protein secretion. The effect on electrical cell responses is mimicked by the GABA(B) receptor agonists baclofen and SKF97541, and blocked by the GABAB receptor antagonists CGP52432 and CGP54626. These findings indicate that GABA has a modulatory role in the control of salivation, acting presynaptically on serotonergic and/or dopaminergic neurotransmission.},
  language  = {en}
}