Salt controls feeding decisions in a blood-sucking insect

Salts are necessary for maintaining homeostatic conditions within the body of all living organisms. Like with all essential nutrients, deficient or excessive ingestion of salts can result in adverse health effects. The taste system is a primary sensory modality that helps animals to make adequate fe...

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Autor principal: Pontes, G.
Otros Autores: Pereira, M.H, Barrozo, R.B
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: Elsevier Ltd 2017
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024 7 |2 cas  |a amiloride, 2016-88-8, 2609-46-3; sodium chloride, 7647-14-5; Amiloride; Epithelial Sodium Channel Blockers; Sodium Chloride 
040 |a Scopus  |b spa  |c AR-BaUEN  |d AR-BaUEN 
030 |a JIPHA 
100 1 |a Pontes, G. 
245 1 0 |a Salt controls feeding decisions in a blood-sucking insect 
260 |b Elsevier Ltd  |c 2017 
270 1 0 |m Barrozo, R.B.; Grupo de Neuroetología de Insectos Vectores, Laboratorio Fisiología de Insectos, IBBEA, CONICET-UBA, DBBE, Facultad Ciencias Exactas y Naturales, Universidad de Buenos AiresArgentina; email: rbarrozo@bg.fcen.uba.ar 
506 |2 openaire  |e Política editorial 
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520 3 |a Salts are necessary for maintaining homeostatic conditions within the body of all living organisms. Like with all essential nutrients, deficient or excessive ingestion of salts can result in adverse health effects. The taste system is a primary sensory modality that helps animals to make adequate feeding decisions in terms of salt consumption. In this work we show that sodium and potassium chloride salts modulate the feeding behavior of Rhodnius prolixus in a concentration-dependent manner. Feeding is only triggered by an optimal concentration of any of these salts (0.1–0.15 M) and in presence of the phagostimulant ATP. Conversely, feeding solutions that do not contain salts or have a high-salt concentration (>0.3 M) are not ingested by insects. Notably, we show that feeding decisions of insects cannot be explained as an osmotic effect, because they still feed over hyperosmotic solutions bearing the optimal salt concentration. Insects perceive optimal-salt, no-salt and high-salt solutions as different gustatory information, as revealed the electromyogram recordings of the cibarial pump. Moreover, because insects do a continuous gustatory monitoring of the incoming food during feeding, sudden changes beyond the optimal sodium concentration decrease and even inhibit feeding. The administration of amiloride, a sodium channel blocker, noticeably reduces the ingestion of the optimal sodium solution but not of the optimal potassium solution. Salt detection seems to occur at least through two salt receptors, one amiloride-sensitive and another amiloride-insensitive. Our results confirm the importance of the gustatory system in R. prolixus, showing the relevant role that salts play on their feeding decisions. © 2016 Elsevier Ltd  |l eng 
536 |a Detalles de la financiación: PICT 2013-1253 
536 |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas, PIP 11220110101053 
536 |a Detalles de la financiación: The authors thank to S. Minoli for his helpful comments and D. Anfossi for his contribution developing the software needed for EMGs analysis. This work was supported by the Agencia Nacional de Promoci?n Cient?fica y Tecnol?gica (ANPCyT) (grant code PICT 2013-1253 to RBB) and the Consejo Nacional de Investigaciones Cient?ficas y T?cnicas (CONICET) (grant code PIP 11220110101053 to RBB). We specially thank the reviewers for their fruitful suggestions. 
593 |a Grupo de Neuroetología de Insectos Vectores, Laboratorio Fisiología de Insectos, IBBEA, CONICET-UBA, DBBE, Facultad Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, BA, Argentina 
593 |a Laboratório de Fisiologia de Insetos Hematófagos, Departamento de Parasitologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil 
690 1 0 |a AMILORIDE 
690 1 0 |a ELECTROMYOGRAM 
690 1 0 |a FEEDING 
690 1 0 |a RHODNIUS PROLIXUS 
690 1 0 |a SALT 
690 1 0 |a TASTE 
690 1 0 |a BODY CONDITION 
690 1 0 |a CONCENTRATION (COMPOSITION) 
690 1 0 |a FEEDING BEHAVIOR 
690 1 0 |a INGESTION RATE 
690 1 0 |a INSECT 
690 1 0 |a OPTIMIZATION 
690 1 0 |a SALT 
690 1 0 |a SENSORY SYSTEM 
690 1 0 |a SODIUM CHLORIDE 
690 1 0 |a TASTE 
690 1 0 |a ANIMALIA 
690 1 0 |a HEXAPODA 
690 1 0 |a RHODNIUS PROLIXUS 
690 1 0 |a AMILORIDE 
690 1 0 |a EPITHELIAL SODIUM CHANNEL BLOCKING AGENT 
690 1 0 |a SODIUM CHLORIDE 
690 1 0 |a ANIMAL 
690 1 0 |a DRUG EFFECTS 
690 1 0 |a FEEDING BEHAVIOR 
690 1 0 |a GROWTH, DEVELOPMENT AND AGING 
690 1 0 |a NYMPH 
690 1 0 |a PHYSIOLOGY 
690 1 0 |a RHODNIUS 
690 1 0 |a TASTE 
690 1 0 |a AMILORIDE 
690 1 0 |a ANIMALS 
690 1 0 |a EPITHELIAL SODIUM CHANNEL BLOCKERS 
690 1 0 |a FEEDING BEHAVIOR 
690 1 0 |a NYMPH 
690 1 0 |a RHODNIUS 
690 1 0 |a SODIUM CHLORIDE 
690 1 0 |a TASTE PERCEPTION 
650 1 7 |2 spines  |a HOMEOSTASIS 
700 1 |a Pereira, M.H. 
700 1 |a Barrozo, R.B. 
773 0 |d Elsevier Ltd, 2017  |g v. 98  |h pp. 93-100  |p J. Insect Physiol.  |x 00221910  |w (AR-BaUEN)CENRE-668  |t Journal of Insect Physiology 
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