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Neurobiology of fear and stress

Grant number: 98/11187-2
Support type:Research Projects - Thematic Grants
Duration: April 01, 1999 - March 31, 2003
Field of knowledge:Biological Sciences - Pharmacology
Principal Investigator:Marcus Lira Brandão
Grantee:Marcus Lira Brandão
Home Institution: Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil
Co-Principal Investigators:Silvio Morato de Carvalho
Associated grant(s):01/05527-0 - Maria Angelica de Souza Silva | Universitat Dusseldorf - Germany, AV.EXT


This project aims to advance current knowledge on the principles that govern the processing of sensory information and behavioral expression, as well as the electro-physiological and neurochemical mechanisms underlying adverse responses associated with fear and anxiety. The studies are arranged in seven large groups representing the behavioral (neurochemical modulation and environmental determination), sensory (analgesia induced by stress), electro-physiological, neuroimmunohistochemical and neurochemical correlatives of the defense reaction. In this last project efforts will also be made aimed at developing compounds with ansiolytic potential. (AU)

Scientific publications (35)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
RODRIGUEZ LAMPREA, MARISOL; BECERRA GARCIA, ANDREA MILENA; MORATO, SILVIO. Effects of reversible inactivation of the medial septum on rat exploratory behavior in the elevated plus-maze using a test-retest paradigm. Behavioural Brain Research, v. 210, n. 1, p. 67-73, JUN 26 2010. Web of Science Citations: 10.
BOTELHO‚ S.; ESTANISLAU‚ C.; MORATO‚ S. Effects of under-and overcrowding on exploratory behavior in the elevated plus-maze. Behavioural Processes, v. 74, n. 3, p. 357-362, 2007.
COIMBRA‚ NC; DE OLIVEIRA‚ R.; FREITAS‚ RL; RIBEIRO‚ SJ; BORELLI‚ KG; PACAGNELLA‚ RC; MOREIRA‚ JE; DA SILVA‚ LA; MELO‚ LL; LUNARDI‚ LO; OTHERS. Neuroanatomical approaches of the tectum-reticular pathways and immunohistochemical evidence for serotonin-positive perikarya on neuronal substrates of the superior colliculus and periaqueductal gray matter involved in the elaboration of the defensive behavior and fear-induced analgesia. Experimental Neurology, v. 197, n. 1, p. 93-112, 2006.
DE LUCA-VINHAS‚ M.C.Z.; MACEDO‚ C.E.; BRANDÃO‚ M.L. Pharmacological assessment of the freezing‚ antinociception‚ and exploratory behavior organized in the ventrolateral periaqueductal gray. Pain, v. 121, n. 1-2, p. 94-104, 2006.
OLIVEIRA‚ L.C.; NOBRE‚ M.J.; BRANDÃO‚ M.L.; LANDEIRA-FERNANDEZ‚ J. Role of amygdala in conditioned and unconditioned fear generated in the periaqueductal gray. Neuroreport, v. 15, n. 14, p. 2281, 2004.
OSAKI, M. Y.; CASTELLAN-BALDAN, L.; CALVO, F.; CARVALHO, A. D.; FELIPPOTTI, T. T.; OLIVEIRA, R. DE; UBIALI, W. A.; PASCHOALIN-MAURIN, T.; ELIAS-FILHO, D. H.; MOTTA, V.; ET AL. Neuroanatomical and neuropharmacological study of opioid pathways in the mesencephalic tectum: effect of mu(1)- and kappa-opioid receptor blockade on escape behavior induced by electrical stimulation of the inferior colliculus. Brain Research, v. 992, n. 2, p. 179-192, Dec. 2003.
AVANZI‚ V.; SILVA‚ RCB; MACEDO‚ CE; BRANDÃO‚ ML. 5-HT mechanisms of median raphe nucleus in the conditioned freezing caused by light/foot-shock association. Physiology & Behavior, v. 78, n. 3, p. 471-477, 2003.
D.M.L. VIANNA; M.L. BRANDÃO. Anatomical connections of the periaqueductal gray: specific neural substrates for different kinds of fear. Brazilian Journal of Medical and Biological Research, v. 36, n. 5, p. 557-566, Maio 2003.
DOMINGUEZ‚ R.; CRUZ-MORALES‚ S.E.; CARVALHO‚ M.C.; XAVIER‚ M.; BRANDAO‚ M.L. Effect of steroid injection to newborn rats on serotonin activity in frontal cortex and raphe. Neuroreport, v. 14, n. 4, p. 597-599, 2003.
DOMÍNGUEZ‚ R.; CRUZ-MORALES‚ S.E.; CARVALHO‚ M.C.; XAVIER‚ M.; BRANDAO‚ M.L. Sex differences in serotonergic activity in dorsal and median raphe nucleus. Physiology & Behavior, v. 80, n. 2, p. 203-210, 2003.
M.R. LAMPREA; F.P. CARDENAS; R. SILVEIRA; T.J. WALSH; S. MORATO. Effects of septal cholinergic lesion on rat exploratory behavior in an open-field. Brazilian Journal of Medical and Biological Research, v. 36, n. 2, p. 233-238, Fev. 2003.
SILVA‚ RCB; SANTOS‚ NR; BRANDAO‚ ML. Influence of housing conditions on the effects of serotonergic drugs on feeding behavior in non-deprived rats. NEUROPSYCHOBIOLOGY, v. 47, n. 2, p. 98-101, 2003.
TRONCOSO‚ A.C.; OSAKI‚ M.Y.; MASON‚ S.; BORELLI‚ K.G.; BRANDÃO‚ M.L. Apomorphine enhances conditioned responses induced by aversive stimulation of the inferior colliculus. NEUROPSYCHOPHARMACOLOGY, v. 28, n. 2, p. 284-291, 2003.
EICHENBERGER‚ GCD; RIBEIRO‚ SJ; OSAKI‚ MY; MARUOKA‚ RY; RESENDE‚ GCC; CASTELLAN-BALDAN‚ L.; CORRÍA‚ SAL; DA SILVA‚ LA; COIMBRA‚ NC. Neuroanatomical and psychopharmacological evidence for interaction between opioid and GABAergic neural pathways in the modulation of fear and defense elicited by electrical and chemical stimulation of the deep layers of the superior colliculus and dorsal periaqueductal gray matter. Neuropharmacology, v. 42, n. 1, p. 48-59, 2002.
LAMPREA‚ M.R.; CARDENAS‚ F.P.; VIANNA‚ D.M.; CASTILHO‚ V.M.; CRUZ-MORALES‚ S.E.; BRANDÃO‚ M.L. The distribution of fos immunoreactivity in rat brain following freezing and escape responses elicited by electrical stimulation of the inferior colliculus. Brain Research, v. 950, n. 1, p. 186-194, 2002.
MACEDO‚ C.E.; CASTILHO‚ V.M.; DE SOUZA E SILVA‚ M.A.; BRANDÃO‚ M.L. Dual 5-HT mechanisms in basolateral and central nuclei of amygdala in the regulation of the defensive behavior induced by electrical stimulation of the inferior colliculus. Brain Research Bulletin, v. 59, n. 3, p. 189-195, 2002.
MARTÍNEZ‚ J.C.; CARDENAS‚ F.; LAMPREA‚ M.; MORATO‚ S. The role of vision and proprioception in the aversion of rats to the open arms of an elevated plus-maze. Behavioural Processes, v. 60, n. 1, p. 15-26, 2002.
SANTOS‚ NR; HUSTON‚ JP; BRANDAO‚ ML. Further evidence for the involvement of histamine H2 receptors in the control of defensive behaviour generated in the midbrain tectum. Behavioural Pharmacology, v. 13, n. 1, p. 73-80, 2002.
AVANZI‚ V.; BRANDÃO‚ ML. Activation of somatodendritic 5-HT1A autoreceptors in the median raphe nucleus disrupts the contextual conditioning in rats. Behavioural Brain Research, v. 126, n. 1-2, p. 175-184, 2001.
BRANDÃO‚ M.L.; COIMBRA‚ N.C.; OSAKI‚ M.Y. Changes in the auditory-evoked potentials induced by fear-evoking stimulations. Physiology & Behavior, v. 72, n. 3, p. 365-372, 2001.
CARDENAS‚ F.; LAMPREA‚ M.R.; MORATO‚ S. Vibrissal sense is not the main sensory modality in rat exploratory behavior in the elevated plus-maze. Behavioural Brain Research, v. 122, n. 2, p. 169-174, 2001.
DE ARAUJO‚ JE; HASENÖHRL‚ RU; HUSTON‚ JP; BRANDÃO‚ ML. Hyperanxiety produced by periaqueductal gray injection of chondroitin sulphate glycosaminoglycan. Neuroreport, v. 12, n. 14, p. 3081-3084, 2001.
SANTOS‚ NR; HUSTON‚ JP; BRANDÃO‚ ML. Escape behavior under tonic inhibitory control of histamine H2-receptor mediated mechanisms in the midbrain tectum. Behavioural Brain Research, v. 124, n. 2, p. 167-175, 2001.
VIANNA‚ D.M.L.; GRAEFF‚ F.G.; LANDEIRA-FERNANDEZ‚ J.; BRANDÃO‚ M.L. Lesion of the ventral periaqueductal gray reduces conditioned fear but does not change freezing induced by stimulation of the dorsal periaqueductal gray. LEARNING & MEMORY, v. 8, n. 3, p. 164-169, 2001.
CUADRA‚ G.; ZURITA‚ A.; MACEDO‚ C.E.; MOLINA‚ V.A.; BRANDÃO‚ M.L. Electrical stimulation of the midbrain tectum enhances dopamine release in the frontal cortex. Brain Research Bulletin, v. 52, n. 5, p. 413-418, 2000.
LAMPREA‚ MR; CARDENAS‚ FP; SILVEIRA‚ R.; MORATO‚ S.; WALSH‚ TJ. Dissociation of memory and anxiety in a repeated elevated plus maze paradigm: forebrain cholinergic mechanisms. Behavioural Brain Research, v. 117, n. 1, p. 97-105, 2000.
PANDOSSIO‚ JE; MOLINA‚ VA; BRANDAO‚ ML. Prior electrical stimulation of the inferior colliculus sensitizes rats to the stress of the elevated plus-maze test. Behavioural Brain Research, v. 109, n. 1, p. 19-25, 2000.
SANTE‚ AB; NOBRE‚ MJ; BRANDAO‚ ML. Place aversion induced by blockade of [mu] or activation of [kappa] opioid receptors in the dorsal periaqueductal gray matter. Behavioural Pharmacology, v. 11, n. 7-8, p. 583-589, 2000.
ANSELONI‚ V.C.Z.; COIMBRA‚ N.C.; MORATO‚ S.; BRANDÃO‚ M.L. A comparative study of the effects of morphine in the dorsal periaqueductal gray and nucleus accumbens of rats submitted to the elevated plus-maze test. Experimental Brain Research, v. 129, n. 2, p. 260-268, 1999.
DE ARAÚJO‚ J.E.; SILVA‚ R.C.B.; HUSTON‚ J.P.; BRANDÃO‚ M.L. Anxiogenic effects of substance P and its 7-11 C terminal‚ but not the 1-7 N terminal‚ injected into the dorsal periaqueductal gray☆. Peptides, v. 20, n. 12, p. 1437-1443, 1999.

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