1. Molecular pharmacology of somatostatin receptors

   • Daniel Hoyer
   • Hermann Lübbert
   • Christian Bruns

   Invited Review Pages: 441 - 453

2. Noradrenaline release from rat sympathetic neurons evoked by P₂-purinoceptor activation

   • Stefan Boehm

   Original Articles Pages: 454 - 458

3. β Adrenoceptor-mediated facilitation of endogenous noradrenaline release from rat isolated trachea

   • Gernot Brunn
   • Ignaz Wessler
   • Kurt Racké

   Original Articles Pages: 459 - 463

4. Muscarinic inhibition of endogenous noradrenaline release from rabbit isolated trachea: receptor subtype and receptor reserve

   • Claudia Hey
   • Ignaz Wessler
   • Kurt Racké

   Original Articles Pages: 464 - 472

5. Presynaptic α_2A-adrenoceptors inhibit the release of endogenous dopamine in rabbit caudate nucleus slices

   • Anne-Ulrike Trendelenburg
   • Klaus Starke
   • Norbert Limberger

   Original Articles Pages: 473 - 481

6. The fade of the purinergic neurogenic contraction of the guinea-pig vas deferens: analysis of possible mechanisms

   • Bernd Driessen
   • Ivar von Kügelgen
   • Klaus Starker

   Original Articles Pages: 482 - 490

7. Release of ATP in rat vas deferens: origin and role of calcium

   • Anna Kordelia Kurz
   • Ralph Bültmann
   • Klaus Starke

   Original Articles Pages: 491 - 498

8. Effect of desipramine-induced blockade of neuronal uptake mechanisms on adrenoceptor-mediated responses in the guinea-pig colon

   • Franca Marino
   • Manuela Marcoli
   • Gian Mario Frigo

   Original Articles Pages: 499 - 506

9. Agonist-induced down-regulation of the m4 muscarinic acetylcholine receptor occurs without changes in receptor mRNA steady-state levels

   • Wolfgang Lenz
   • Cornelia Petrusch
   • Chris J. van Koppen

   Original Articles Pages: 507 - 513

10. Evidence that the presynaptic A_2a-adenosine receptor of the rat motor nerve endings is positively coupled to adenylate cyclase

    • P. Correia-de-Sá
    • J. A. Ribeiro

    Original Articles Pages: 514 - 522

11. Effects of the centrally acting cholinesterase inhibitors tetrahydroaminoacridine and E2020 on the basal concentration of extracellular acetylcholine in the hippocampus of freely moving rats

    • Koichiro Kawashima
    • Akio Sato
    • Takeshi Suzuki

    Original Articles Pages: 523 - 528

12. Effect of ω-conotoxin on cholinergic and tachykininergic excitatory neurotransmission to the circular muscle of the guinea-pig colon

    • Carlo Alberto Maggi
    • Peter Holzer
    • Sandro Giuliani

    Original Articles Pages: 529 - 536

13. Multiple mechanisms in the smooth muscle relaxant action of calcitonin gene-related peptide (CGRP) in the guinea-pig ureter

    • Carlo Alberto Maggi
    • Sandro Giuliani
    • Paolo Santicioli

    Original Articles Pages: 537 - 547

14. Withdrawal from repeated morphine sensitises mice to the striatal dopamine release enhancing effect of acute morphine

    • Juha Airio
    • Martti Attila
    • Liisa Ahtee

    Original Articles Pages: 548 - 554

15. Differential effects of CGP 37849 and MK-801, competitive and noncompetitive NMDA antagonists, with respect to the modulation of sensorimotor gating and dopamine outflow in the prefrontal cortex of rats

    • Krzysztof Wędzony
    • Krystyna Gołembiowska
    • Magdalena Zazula

    Original Articles Pages: 555 - 562

16. Phentolamine and hypoxia: modulation of contractility and α₁-adrenoceptors in isolated rat atria

    • G. Froldi
    • L. Guerra
    • G. Fassina

    Original Articles Pages: 563 - 568

17. Acute normovolaemic anaemia prevents ethanol-induced gastric damage in rats through a blood flow related mechanism

    • Maria Casadevall
    • Josep M. Piqué
    • Josep Terés

    Original Articles Pages: 569 - 574

18. Sphinganine potentiation of cellular differentiation induced by various anti-leukemia drugs in human leukemia cell line HL-60

    • Benjamin Yat-Ming Yung

    Original Articles Pages: 575 - 581

19. Nitric oxide induces acetylcholine-mediated contractions in the guinea-pig small intestine

    • Lorand Barthó
    • Romain Lefebvre

    Short Communication Pages: 582 - 584