+   László Hiripi - Senior Research Fellow

László Hiripi MSc, Ph.D.
senior research fellow
Institute Building C, laboratory of neurochemistry
tel: +36 87 448244 ext №217
fax: +36 87 448006

Research Area
Research Description
Selected Publications

Academic degrees

Diploma in Chemistry ( Lajos Kossuth University, Debrecen, Hungary)


Dr. Univ. ( Lajos Kossuth University, Debrecen, Hungary )


Candidate of biological sciences (Hungarian Academy of Sciences) equivalent to Ph.D.

  Research Area

Comparative neurochemistry of the nervous system of invertebrates (molluscs, arthropods, annelides)

  Research Description

Demonstration of the transmitter role of serotonin, dopamine, octopamine and tyramine in the central nervous system of gastropods, insects and annelids. Investigation of the role of serotonin and dopamine in the regulation of the locomotory activity and hybernation of the snail Helix pomatia. Identification as well as kinetic and pharmacological characterization of octopaminergic, tyraminergic, cholinergic, serotonergic and dopaminergic receptors in the nervous system of insects and gastropods. Characterization of cholinergic muscarin and nicotin type receptors in the gastropod nervous system demonstrating a conservative route of the filogenetic development of the colinergic receptors. Identification and characterization of the serotonin and dopamine receptors in the gastropoda central nervous system, demonstrating the significant differences from the vertebrate receptors. Biochemical characterization of the embryogenesis of the dopaminergic, serotonergic and octopaminergic system in a gastopod, Lymnaea stagnalis. Investigation of the role of DOPA decarboxylase and dopamine in insect, in the phagocytosis during the removal of an inert particles. Examination the regulatory role of serotonin and octopamine and the second messenger system in the phagocytosis.

  Selected Publications

Hiripi L., Salánki J., Zs.-Nagy I., B.-Musko I.: Subcellular distribution of biogenic monoamines in the central nervous system of Anodonta cygnea L. (Mollusca, Pelecypoda) as revealed by density gradient centrifugation. J.Neurochem. 21, 791-797, 1973.

Hiripi L., Neuhoff V., Osborne N.N.: The uptake of serotonin and catecholamines by the isolated auricle of the snail (Helix pomatia L.) J. Neurochem.,26,335-343,1976.

Hiripi L., Stefano G.B.: Dopamine inhibition of tryptophan hydroxylase in molluscan nervous tissue homogenates: evidence for intracellular site of action. Life Sciences 27,1205-1209,1980

Hiripi L., S.-Rózsa K.: Octopamine and dopamine-sensitive adenylate cyclase in the brain of Locusta migratoria during its development. Cell.Mol.Neurobiol. 4, 199-209,1984

Kemenes G., Hiripi L., Benjamin P.R.: Behavioral and biochemical changes in the feeding system of Lymnaea induced by the dopamine and serotonin neurotoxins 6-hydroxytryptamine and 5,6-dihydroxytryptamine. Phil.Trans. R.Soc. Lond.B. 329, 243-255, 1990.

Hiripi L., Downer R.G.H.: Characterization of [3H]Serotonin [3H]Ketanserin and [3H]Mianserin binding sites in insect ( Locusta migratoria) brain. Insect Biochem. Molec. Biol. 23, 303-307, 1993.

Hiripi L., Juhos Sz., Downer R.G.H.: Characterization of tyramine and octopamine receptors in the insect (Locusta migratoria migratorioides ) brain. Brain Res. 633, 119 - 126, 1994.

Hiripi L., Vehovszky A., Juhosn Sz., Elekes K.: An octopaminergic system in the CNS of the snail, Lymnaea stagnalis and Helix pomatia. Phil. Trans. R. Soc.Lond. B. 353, 1621-1629, 1998.

Voronezhskaya E.E., Hiripi L., Elekes K., Croll R.P.: Development of catecholaminergic neurones in pond snail, Lymnaea stagnalis: II Postembrionic development of central and peripheral cells. J. Comp. Neurol. 404, 285-296, 1999.

Croll R.P., Voronezhskaya E.E., Hiripi L., Elekes K.: Developnment of catwecholaminergic neurones in pond snail, Lymnaea stagnalis: II. Postembrionic development of central and peripheral cells. J. Comp. Neurology., 404,297-309,1999.

Hiripi L., Nagy L., Hollingworth R. M.: In vitro and in vivo effects of formamidines in locust (Locusta migratoria migratorioides). Acta Biol.Hung. 50, 81-87, 1999.

Nagy L., Hiripi L.: Role of tyrosine, DOPA and decarboxylase enzymes in the synthesis of monoamines in the brain of the locust. Neurochem. Int. 41, 9-16, 2002.

Kiss T., Hiripi L., Papp N., Elekes K.: Dopamine and serotonin receptors mediating contractions of the snail, Helix pomatia, salivary duct.: Neuroscience, 116, 775-790, 2003. April 23.