Allatotropin modulates myostimulatory and cardioacceleratory activities in Rhodnius prolixus (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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2015
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19326203_v10_n4_p_VillalobosSambucaro http://hdl.handle.net/20.500.12110/paper_19326203_v10_n4_p_VillalobosSambucaro |
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paper:paper_19326203_v10_n4_p_VillalobosSambucaro2023-06-08T16:30:30Z Allatotropin modulates myostimulatory and cardioacceleratory activities in Rhodnius prolixus (Stal) Lorenzo Figueiras, Alicia Nieves allatotropin angiotensin receptor messenger RNA orexin serotonin allatotropin insect hormone insect protein neuropeptide receptor serotonin amino acid sequence animal experiment aorta aorta constriction Article cardioacceleratory activity controlled study diuresis exon hemolymph humidity male Malpighian tubule midgut muscle contraction muscle excitation nonhuman osmosis peristalsis protein domain protein expression protein function Rhodnius prolixus animal antibody specificity circadian rhythm metabolism muscle contraction physiology Rhodnius smooth muscle vasoconstriction Hexapoda Rhodnius prolixus Triatoma infestans Triatominae Animals Aorta Circadian Rhythm Insect Hormones Insect Proteins Male Muscle Contraction Muscle, Smooth Neuropeptides Organ Specificity Receptors, Peptide Rhodnius Serotonin Vasoconstriction 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 Triatoma infestans; 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 Rhodnius prolixus. 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 R. prolixus. © 2015 Villalobos-Sambucaro et al. Fil:Lorenzo-Figueiras, A.N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19326203_v10_n4_p_VillalobosSambucaro http://hdl.handle.net/20.500.12110/paper_19326203_v10_n4_p_VillalobosSambucaro |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
allatotropin angiotensin receptor messenger RNA orexin serotonin allatotropin insect hormone insect protein neuropeptide receptor serotonin amino acid sequence animal experiment aorta aorta constriction Article cardioacceleratory activity controlled study diuresis exon hemolymph humidity male Malpighian tubule midgut muscle contraction muscle excitation nonhuman osmosis peristalsis protein domain protein expression protein function Rhodnius prolixus animal antibody specificity circadian rhythm metabolism muscle contraction physiology Rhodnius smooth muscle vasoconstriction Hexapoda Rhodnius prolixus Triatoma infestans Triatominae Animals Aorta Circadian Rhythm Insect Hormones Insect Proteins Male Muscle Contraction Muscle, Smooth Neuropeptides Organ Specificity Receptors, Peptide Rhodnius Serotonin Vasoconstriction |
| spellingShingle |
allatotropin angiotensin receptor messenger RNA orexin serotonin allatotropin insect hormone insect protein neuropeptide receptor serotonin amino acid sequence animal experiment aorta aorta constriction Article cardioacceleratory activity controlled study diuresis exon hemolymph humidity male Malpighian tubule midgut muscle contraction muscle excitation nonhuman osmosis peristalsis protein domain protein expression protein function Rhodnius prolixus animal antibody specificity circadian rhythm metabolism muscle contraction physiology Rhodnius smooth muscle vasoconstriction Hexapoda Rhodnius prolixus Triatoma infestans Triatominae Animals Aorta Circadian Rhythm Insect Hormones Insect Proteins Male Muscle Contraction Muscle, Smooth Neuropeptides Organ Specificity Receptors, Peptide Rhodnius Serotonin Vasoconstriction Lorenzo Figueiras, Alicia Nieves Allatotropin modulates myostimulatory and cardioacceleratory activities in Rhodnius prolixus (Stal) |
| topic_facet |
allatotropin angiotensin receptor messenger RNA orexin serotonin allatotropin insect hormone insect protein neuropeptide receptor serotonin amino acid sequence animal experiment aorta aorta constriction Article cardioacceleratory activity controlled study diuresis exon hemolymph humidity male Malpighian tubule midgut muscle contraction muscle excitation nonhuman osmosis peristalsis protein domain protein expression protein function Rhodnius prolixus animal antibody specificity circadian rhythm metabolism muscle contraction physiology Rhodnius smooth muscle vasoconstriction Hexapoda Rhodnius prolixus Triatoma infestans Triatominae Animals Aorta Circadian Rhythm Insect Hormones Insect Proteins Male Muscle Contraction Muscle, Smooth Neuropeptides Organ Specificity Receptors, Peptide Rhodnius Serotonin Vasoconstriction |
| 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 Triatoma infestans; 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 Rhodnius prolixus. 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 R. prolixus. © 2015 Villalobos-Sambucaro et al. |
| author |
Lorenzo Figueiras, Alicia Nieves |
| author_facet |
Lorenzo Figueiras, Alicia Nieves |
| author_sort |
Lorenzo Figueiras, Alicia Nieves |
| title |
Allatotropin modulates myostimulatory and cardioacceleratory activities in Rhodnius prolixus (Stal) |
| title_short |
Allatotropin modulates myostimulatory and cardioacceleratory activities in Rhodnius prolixus (Stal) |
| title_full |
Allatotropin modulates myostimulatory and cardioacceleratory activities in Rhodnius prolixus (Stal) |
| title_fullStr |
Allatotropin modulates myostimulatory and cardioacceleratory activities in Rhodnius prolixus (Stal) |
| title_full_unstemmed |
Allatotropin modulates myostimulatory and cardioacceleratory activities in Rhodnius prolixus (Stal) |
| title_sort |
allatotropin modulates myostimulatory and cardioacceleratory activities in rhodnius prolixus (stal) |
| publishDate |
2015 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19326203_v10_n4_p_VillalobosSambucaro http://hdl.handle.net/20.500.12110/paper_19326203_v10_n4_p_VillalobosSambucaro |
| work_keys_str_mv |
AT lorenzofigueirasalicianieves allatotropinmodulatesmyostimulatoryandcardioacceleratoryactivitiesinrhodniusprolixusstal |
| _version_ |
1768543297478852608 |