Allatotropin modulates myostimulatory and cardioacceleratory activities in <i>Rhodnius prolixus</i> (Stal)

Haematophagous insects can ingest large quantities of blood in a single meal and eliminate high volumes of urine in the next few hours. This rise in diuresis is possible because the excretory activity of the Malpighian tubules is facilitated by an increase in haemolymph circulation as a result of in...

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Autores principales: Villalobos Sambucaro, María José, Lorenzo Figueiras, Alicia Nieves, Riccillo, Fernando Luis, Diambra, Luis Aníbal, Noriega, Fernando Gabriel, Ronderos, Jorge Rafael
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Naturales
Juvenile Hormones
Corpora Allata
JH biosynthesis
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85861
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85861
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Juvenile Hormones
Corpora Allata
JH biosynthesis
spellingShingle Ciencias Naturales
Juvenile Hormones
Corpora Allata
JH biosynthesis
Villalobos Sambucaro, María José
Lorenzo Figueiras, Alicia Nieves
Riccillo, Fernando Luis
Diambra, Luis Aníbal
Noriega, Fernando Gabriel
Ronderos, Jorge Rafael
Allatotropin modulates myostimulatory and cardioacceleratory activities in <i>Rhodnius prolixus</i> (Stal)
topic_facet Ciencias Naturales
Juvenile Hormones
Corpora Allata
JH biosynthesis
description Haematophagous insects can ingest large quantities of blood in a single meal and eliminate high volumes of urine in the next few hours. This rise in diuresis is possible because the excretory activity of the Malpighian tubules is facilitated by an increase in haemolymph circulation as a result of intensification of aorta contractions combined with an increase of the anterior midgut peristaltic waves. It has been previously described that haemolymph circulation during post-prandial diuresis is stimulated by the synergistic activity of allatotropin (AT) and serotonin in the kissing bug <i>Triatoma infestans</i>; resulting in an increase in aorta contractions. In the same species, AT stimulates anterior midgut and rectum muscle contractions to mix urine and feces and facilitate the voiding of the rectum. Furthermore, levels of AT in midgut and Malpighian tubules increased in the afternoon when insects are getting ready for nocturnal feeding. In the present study we describe the synergistic effect of AT and serotonin increasing the frequency of contractions of the aorta in <i>Rhodnius prolixus</i>. The basal frequency of contractions of the aorta in the afternoon is higher that the observed during the morning, suggesting the existence of a daily rhythmic activity. The AT receptor is expressed in the rectum, midgut and dorsal vessel, three critical organs involved in post-randial diuresis. All together these findings provide evidence that AT plays a role as a myoregulatory and cardioacceleratory peptide in <i>R. prolixus</i>.
format Articulo
Articulo
author Villalobos Sambucaro, María José
Lorenzo Figueiras, Alicia Nieves
Riccillo, Fernando Luis
Diambra, Luis Aníbal
Noriega, Fernando Gabriel
Ronderos, Jorge Rafael
author_facet Villalobos Sambucaro, María José
Lorenzo Figueiras, Alicia Nieves
Riccillo, Fernando Luis
Diambra, Luis Aníbal
Noriega, Fernando Gabriel
Ronderos, Jorge Rafael
author_sort Villalobos Sambucaro, María José
title Allatotropin modulates myostimulatory and cardioacceleratory activities in <i>Rhodnius prolixus</i> (Stal)
title_short Allatotropin modulates myostimulatory and cardioacceleratory activities in <i>Rhodnius prolixus</i> (Stal)
title_full Allatotropin modulates myostimulatory and cardioacceleratory activities in <i>Rhodnius prolixus</i> (Stal)
title_fullStr Allatotropin modulates myostimulatory and cardioacceleratory activities in <i>Rhodnius prolixus</i> (Stal)
title_full_unstemmed Allatotropin modulates myostimulatory and cardioacceleratory activities in <i>Rhodnius prolixus</i> (Stal)
title_sort allatotropin modulates myostimulatory and cardioacceleratory activities in <i>rhodnius prolixus</i> (stal)
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/85861
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AT lorenzofigueirasalicianieves allatotropinmodulatesmyostimulatoryandcardioacceleratoryactivitiesinirhodniusprolixusistal
AT riccillofernandoluis allatotropinmodulatesmyostimulatoryandcardioacceleratoryactivitiesinirhodniusprolixusistal
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AT ronderosjorgerafael allatotropinmodulatesmyostimulatoryandcardioacceleratoryactivitiesinirhodniusprolixusistal
bdutipo_str Repositorios
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