Allatostatin-C antagonizes the synergistic myostimulatory effect of allatotropin and serotonin in <i>Rhodnius prolixus</i> (Stal)

Haematophagous insects can ingest large quantities of blood in a single meal producing a large quantity of urine in the following hours to eliminate the excess of water and mineral ions incorporated. The excretory activity of the Malpighian tubules is facilitated by an increase in haemolymph circulation as a result of the intensification of aorta contractions, combined with an increase of anterior midgut peristaltic waves. We have recently shown that haemolymph circulation during post-prandial diuresis is modulated by the synergistic activity of allatotropin (AT) and serotonin, resulting in an increase in aorta and crop contraction rates. In the present study we describe the antagonistic effect of allatostatin-C (AST-C) on the increase of aorta frequency of contractions induced by serotonin/AT in Rhodnius prolixus. The administration of AST-C counteracted the increase in the frequency induced by the treatment with serotonin/ AT, but did not affect the increase in frequency induced by the administration of serotonin alone, suggesting that AST-C is altering the synergism between serotonin and AT. Furthermore, the administration of AST-C during post-prandial diuresis decreases the number of peristaltic waves of the anterior midgut. The AST-C putative receptor is expressed in the hindgut, midgut and dorsal vessel, three critical organs involved in post-prandial diuresis. All together these findings provide evidence that AST-C plays a key role as a myoregulatory and cardioregulatory peptide in R. prolixus.Facultad de Ciencias Naturales y MuseoCentro Regional de Estudios Genómico

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 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.Facultad de Ciencias Naturales y Muse

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 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.Facultad de Ciencias Naturales y Muse

Allatotropin Modulates Myostimulatory and Cardioacceleratory Activities in Rhodnius prolixus (Stal)

Fil: Villalobos-Sambucaro, María José. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra Histología y Embriología Animal; ArgentinaFil: Lorenzo-Figueiras, Alicia Nieves. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental; ArgentinaFil: Riccillo, Fernando Luis. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra Histología y Embriología Animal; ArgentinaFil: Diambra, Luis Anibal. Universidad Nacional de La Plata. Centro Regional de Estudios Genómicos; ArgentinaFil: Noriega, Fernando Gabriel. Florida International University. Department of Biological Sciences; USAFil: Ronderos, Jorge Rafael. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra Histología y Embriología Animal; Argentin

Allatostatin-C antagonizes the synergistic myostimulatory effect of allatotropin and serotonin in <i>Rhodnius prolixus</i> (Stal)

Haematophagous insects can ingest large quantities of blood in a single meal producing a large quantity of urine in the following hours to eliminate the excess of water and mineral ions incorporated. The excretory activity of the Malpighian tubules is facilitated by an increase in haemolymph circulation as a result of the intensification of aorta contractions, combined with an increase of anterior midgut peristaltic waves. We have recently shown that haemolymph circulation during post-prandial diuresis is modulated by the synergistic activity of allatotropin (AT) and serotonin, resulting in an increase in aorta and crop contraction rates. In the present study we describe the antagonistic effect of allatostatin-C (AST-C) on the increase of aorta frequency of contractions induced by serotonin/AT in Rhodnius prolixus. The administration of AST-C counteracted the increase in the frequency induced by the treatment with serotonin/ AT, but did not affect the increase in frequency induced by the administration of serotonin alone, suggesting that AST-C is altering the synergism between serotonin and AT. Furthermore, the administration of AST-C during post-prandial diuresis decreases the number of peristaltic waves of the anterior midgut. The AST-C putative receptor is expressed in the hindgut, midgut and dorsal vessel, three critical organs involved in post-prandial diuresis. All together these findings provide evidence that AST-C plays a key role as a myoregulatory and cardioregulatory peptide in R. prolixus.Facultad de Ciencias Naturales y MuseoCentro Regional de Estudios Genómico

Relación y comparación entre las variables de clima organizacional, satisfacción y calidad de vida en una empresa de ventas por teléfono en el noroeste de México

Purpose. The assessment of the relationship between organizational climate variables, job satisfaction, and quality of life in a telephone sales company in northwest Mexico. Methodology. A total of 194 employees participated, including 157 telephone advisors and 36 administrative staff, of which 77 were men and 115 women. Measure scales were applied to assess organizational climate, job satisfaction, and quality of life. Means were compared through contrast tests and correlations. Findings. Significant differences were found by gender, age, position, and work experience, with lower job satisfaction being perceived among women and telephone advisors. Originality. The relationship between the organizational climate and job satisfaction and the way in which these impact the quality of life of the employee in call sales companies is a thematic space where social sciences and engineering converge. It is important for the sustainability of these companies to study their senior management leadership style, organizational structure and internal management practices to achieve higher levels of effectiveness than their competitors. Conclusions. The work environment and&nbsp;job satisfaction in a call center have a significant correlation with turnover in young undergraduate students, mainly women.Objetivo. Se midió la relación entre las variables de clima organizacional, satisfacción laboral y calidad de vida, en una empresa de ventas por teléfono en el noroeste de México. Metodología. Participaron 194 empleados, 157 eran asesores telefónicos y 36 del personal administrativo, 77 hombres y 115 mujeres. Se aplicaron las escalas de clima organizacional, satisfacción laboral y calidad de vida. Se realizaron comparaciones de medias a través de pruebas de contraste y correlaciones. Hallazgos. Se encontraron diferencias significativas por sexo, edad, puesto y experiencia laboral, donde destaca la percepción de menor satisfacción laboral en mujeres y asesores telefónicos. Originalidad. La relación entre el clima organizacional, la satisfacción laboral y la manera en la cual estas impactan la calidad de vida del empleado en las empresas de venta por llamada es un espacio temático donde convergen ciencias sociales y de ingeniería. Es importante para la sostenibilidad de estas empresas el estudio de su estilo de liderazgo de alta dirección, estructura organizacional y prácticas internas de gestión para alcanzar niveles más altos de efectividad que sus competidores (Dhoopar et al., 2023). Conclusiones. El clima y la satisfacción en un centro de llamadas tienen un nivel importante de correlación con la rotación para jóvenes estudiantes de pregrado en su mayoría mujeres

Sesgo hacia el presente, fuentes de financiamiento y variables productivas: evidencia de un grupo de productores de leche en Hermosillo, Sonora

El objetivo de este trabajo es relacionar el sesgo hacia el presente (SHP) con la elección de fuentes de financiamiento y variables productivas de un grupo de productores de leche en Hermosillo, Sonora. Se seleccionó de manera intencional una muestra de 53 productores de leche (8 mujeres y 45 hombres) con un rango de edad de 29 a 73 años. A través de un cuestionario socioeconómico, productivo, financiero y una prueba de elección, se encontró que (a) el 51% de los productores optan por fuentes informales de financiamiento, de los cuales el 72% presentaron SHP; (b) se registró una producción total de leche de 7,128 litros diarios, en donde el 59% del volumen producido correspondió a productores con SHP; y (c) se obtuvieron diferencias estadísticamente significativas entre el SHP y el tipo de fuente de financiamiento, pero no entre el SHP y la producción. Los resultados obtenidos en la presente investigación no solamente reflejan la alta prevalencia de SHP en los productores, sino que también presentan inconsistencia en sus preferencias, mismas que pueden afectar el desarrollo de la unidad de producción

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 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.Facultad de Ciencias Naturales y Muse

Buenas prácticas para la aplicación de políticas públicas de regeneración urbana, participativas y de buen gobierno

Este manual plantea inicialmente algunos conceptos básicos relacionados con las buenas prácticas en materia de políticas públicas de regeneración urbana orientadas hacia el buen gobierno, luego describe la ruta metodológica y al final se detalla un conjunto de esas buenas prácticas. Este documento está diseñado pensando en que sea de utilidad para la toma de decisiones y la planificación de acciones tanto para el agente institucional, que cuenta con una formación específica en el tema, como para la ciudadanía que se ve involucrada en los procesos de regeneración urbana en la ciudad