Angiotensin II and the transcription factor Rel/NF-κB link environmental water shortage with memory improvement

One of the essential requirements even in the most ancient life forms is to be able to preserve body fluid medium. In line with such requirement, animals need to perform different behaviors to cope with water shortages. As angiotensin II (ANGII) is involved on a widespread range of functions in vert...

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Autor principal: Frenkel, L.
Otros Autores: Freudenthal, R., Romano, A., Nahmod, V.E, Maldonado, H., Delorenzi, A.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: Elsevier Ltd 2002
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024 7 |2 cas  |a angiotensin, 1407-47-2; saralasin, 34273-10-4; sodium, 7440-23-5 
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100 1 |a Frenkel, L. 
245 1 0 |a Angiotensin II and the transcription factor Rel/NF-κB link environmental water shortage with memory improvement 
260 |b Elsevier Ltd  |c 2002 
270 1 0 |m Delorenzi, A.; Depto. de Fisiol., Biol. Molec./Cel., Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, Argentina; email: delorenzi@fbmc.fcen.uba.ar 
506 |2 openaire  |e Política editorial 
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520 3 |a One of the essential requirements even in the most ancient life forms is to be able to preserve body fluid medium. In line with such requirement, animals need to perform different behaviors to cope with water shortages. As angiotensin II (ANGII) is involved on a widespread range of functions in vertebrates, including memory modulation, an integrative role, in response to an environmental water shortage, has been envisioned. Previous work on the semi-terrestrial and brackish-water crab Chasmagnathus granulatus showed that endogenous ANGII enhanced an associative long-term memory and, in addition, that high salinity environment induces both an increase of brain ANGII levels and memory improvement. Here, we show that in the crab Chasmagnathus air exposure transiently increases blood sodium concentration, significantly increases brain ANGII immunoreactivity, and has a facilitatory effect on memory that is abolished by a non-selective ANGII receptor antagonist, saralasin. Furthermore, Rel/NF-κB, a transcription factor activated by ANGII in mammals and during memory consolidation in Chasmagnathus brain, is induced in the crab's brain by air exposure. Moreover, nuclear brain NF-κB is activated by ANGII, and this effect is reversed by saralasin. Our results constitute the first demonstration in an invertebrate that cognitive functions are modulated by an environmental stimulus through a neuropeptide and give evolutionary support to the role of angiotensins in memory processes. Moreover, these results suggest that angiotensinergic system is preserved across evolution not only in its structure and molecular mechanisms, but also in its capability of coordinating specific adaptative responses. © 2002 IBRO. Published by Elsevier Science Ltd. All rights reserved.  |l eng 
536 |a Detalles de la financiación: Agencia Nacional de Promoción Científica y Tecnológica, 1-06041, PICT 1-06602 
536 |a Detalles de la financiación: We thank A. Alvarez and A. Vidal for technical assistance. The use of flame spectrophotometer was kindly provided by Dr. E. Rodriguez. We are grateful to Dr. G. Gallizia for critical comments and Dr. L. Orelli for helping with the manuscript. We thank members of the Laboratorio de Neurobiologı́a de la Memoria for discussion and comments. Supported by Agencia Nacional de Promoción Cientı́fica y Tecnológica, PICT 1-06602 and 1-06041. 
593 |a Laboratorio de Neurobiología de la Memoria, Departamento de Fisiología, Ciudad Universitaria, Pabellón II (C1428EHA), Buenos Aires, Argentina 
593 |a Laboratorio de Sustancias Vasoactivas, Instituto de Investigaciones Médicas, Universidad de Buenos Aires, Donato Alvarez 3150, Buenos Aires, Argentina 
690 1 0 |a ANGIOTENSIN 
690 1 0 |a INVERTEBRATE 
690 1 0 |a MEMORY 
690 1 0 |a NEUROPEPTIDE 
690 1 0 |a NF-ΚB OSMOREGULATION 
690 1 0 |a ANGIOTENSIN 
690 1 0 |a ANGIOTENSIN RECEPTOR ANTAGONIST 
690 1 0 |a IMMUNOGLOBULIN ENHANCER BINDING PROTEIN 
690 1 0 |a SARALASIN 
690 1 0 |a SODIUM 
690 1 0 |a TRANSCRIPTION FACTOR 
690 1 0 |a TRANSCRIPTION FACTOR REL 
690 1 0 |a UNCLASSIFIED DRUG 
690 1 0 |a ANIMAL EXPERIMENT 
690 1 0 |a ANIMAL TISSUE 
690 1 0 |a ARTICLE 
690 1 0 |a COGNITION 
690 1 0 |a CONTROLLED STUDY 
690 1 0 |a CRAB 
690 1 0 |a ENVIRONMENTAL EXPOSURE 
690 1 0 |a IMMUNOREACTIVITY 
690 1 0 |a MALE 
690 1 0 |a MEMORY CONSOLIDATION 
690 1 0 |a NONHUMAN 
690 1 0 |a PRIORITY JOURNAL 
690 1 0 |a PROTEIN FUNCTION 
690 1 0 |a SODIUM BLOOD LEVEL 
700 1 |a Freudenthal, R. 
700 1 |a Romano, A. 
700 1 |a Nahmod, V.E 
700 1 |a Maldonado, H. 
700 1 |a Delorenzi, A. 
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