48 results on '"Vilella, S."'
Search Results
2. Psychological State after an Acute Coronary Syndrome: Impact of Physical Limitations
- Author
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Serrano-Rosa M, Leon-Zarceno E, Giglio C, Boix-Vilella S, Moreno-Tenas A, Pamies-Aubalat L, and Arrarte V
- Subjects
quality of life ,physical limitations ,patient perception ,psychological factors ,acute coronary syndrome - Abstract
The aim of this study was to investigate how physical limitations after ACS influence patients' quality of life and health perception. This was a longitudinal clinical study. We recruited 146 patients diagnosed with ACS. The patients performed a stress test (Bruce's protocol) for the evaluation of physical limitations and were classified according to the test result: without physical limitations (more than 10 METS), with some physical limitations (7 to 9 METS), and with high physical limitations (less than 6 METS). Significant differences were found between the three groups immediately after the diagnosis of ACS and after a period of three months, regarding health perception, anxiety, depression, sexual relationships, distress, and adjustment to disease. These differences resulted larger between the group with less limitations and the group with higher limitations. After 3 months, however, there was an overall improvement in all variables. In conclusion, physical limitations after ACS seem to influence perceived quality of life determined by measuring general health, vitality, total adaptation, emotional role, social adaptation, depression, and anxiety. Therefore, the highest the physical limitations, the poorer the psychological conditions and vice versa, even 3 months after ACS diagnosis.
- Published
- 2021
3. Legislación
- Author
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Bañares Vilella, S., Collado Amores, M.C., Gueimonde Fernández, Miguel, and Gueimonde Fernández, Miguel [0000-0002-0192-901X]
- Subjects
education - Published
- 2016
4. Levels of identification with the physical exercise on a sample of teachers who exercise with Pilates: scientific literature to practice
- Author
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Boix-Vilella, S., León, E., and Serrano, M.A.
- Subjects
Identification with physical exercise ,Adherence ,Teacher ,Profesores ,Pilates ,Identificación con el ejercicio físico ,Adherencia - Abstract
Antecedentes: El análisis de la identidad con el ejercicio físico es totalmente necesario para tratar de revertir las actuales tendencias de inactividad física y favorecer la adherencia del profesorado a programas físico-deportivos. Por ello, el objetivo del presente estudio es analizar los niveles de identificación con el ejercicio físico en un grupo de profesores que practica regularmente Pilates. Método: La metodología empleada en esta investigación es transversal y el tamaño muestral es acorde a los estudios previos de intervención que analizan Pilates. La muestra está formada por 52 profesores (39 mujeres y 13 hombres); de ellos 14 se ejercitan exclusivamente con Pilates, 12 combinan Pilates y otras actividades físicas, 13 son considerados sedentarios y los otros 13 se ejercitan con actividades distintas al Pilates, yoga y Taichí. El grupo experimental asiste a Pilates una media semanal de 3.23 días y el grupo control activo 3.54 días. La edad media de la muestra es de 36.98 años. Resultados: Los resultados muestran como el grupo de profesores que combina Pilates con otras actividades es el que obtiene los mayores niveles de identificación con el ejercicio físico frente a los grupos control activo y sedentario. Además, las diferencias entre los grupos solo Pilates y control activo con respecto al grupo sedentario también resultan significativas. Conclusiones: En función de los resultados encontrados, la técnica Pilates puede ser de gran utilidad entre el profesorado ya que su práctica se asocia con mayores niveles de adherencia. Además, si se combina Pilates con otras actividades físico-deportivas aumenta la probabilidad de permanecer durante más tiempo activo, disfrutando así durante más tiempo de los beneficios que proporciona el ejercicio sobre la salud física, psicológica y social. Background: The analysis of identity with exercise is absolutely necessary to try to reverse the current trends of physical inactivity and promote the adhesion of physical sports programes. Therefore, the objective of this study is to analyse the levels of identification with physical exercise in a group of teachers who regularly do Pilates. Method: The methodology used in this research is cross-sectional and the sample size is consistent with previous studies that analyse Pilates. The sample consists of 52 teachers (39 women and 13 men); of which 14 exercised exclusively Pilates, 12 combined Pilates and other physical activities, 13 are considered sedentary and the other 13 did other activities different from Pilates, yoga and Tai Chi. The experimental group attended a weekly average of 3.23 days and 3.54 days the active control group Pilates. The average age of the sample is 36.98 years. Results: Statistically significant results show that the group of teachers that combines Pilates with other activities is the one that gets the highest levels of identification with exercise versus active and sedentary controls. Furthermore, differences between Pilates and active groups only with respect to sedentary control group are also significant. Conclusions: According to the results, the Pilates technique can be very useful among teachers because its practice is associated with higher levels of adherence. Also, if Pilates is combined with other physical and sports activities, the probability of remaining active for a longe period of time increases the benefits provided by exercise on physical, psychological and social health.
- Published
- 2016
5. Niveles de identificación con el ejercicio físico en una muestra de profesores que se ejercita con Pilates: de la literatura científica a la práctica
- Author
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Boix-Vilella, S., León, E., and Serrano, M.A.
- Subjects
Identification with physical exercise ,Adherence ,Teacher ,Profesores ,Pilates ,Identificación con el ejercicio físico ,Adherencia - Abstract
Antecedentes: El análisis de la identidad con el ejercicio físico es totalmente necesario para tratar de revertir las actuales tendencias de inactividad física y favorecer la adherencia del profesorado a programas físico-deportivos. Por ello, el objetivo del presente estudio es analizar los niveles de identificación con el ejercicio físico en un grupo de profesores que practica regularmente Pilates. Método: La metodología empleada en esta investigación es transversal y el tamaño muestral es acorde a los estudios previos de intervención que analizan Pilates. La muestra está formada por 52 profesores (39 mujeres y 13 hombres); de ellos 14 se ejercitan exclusivamente con Pilates, 12 combinan Pilates y otras actividades físicas, 13 son considerados sedentarios y los otros 13 se ejercitan con actividades distintas al Pilates, yoga y Taichí. El grupo experimental asiste a Pilates una media semanal de 3.23 días y el grupo control activo 3.54 días. La edad media de la muestra es de 36.98 años. Resultados: Los resultados muestran como el grupo de profesores que combina Pilates con otras actividades es el que obtiene los mayores niveles de identificación con el ejercicio físico frente a los grupos control activo y sedentario. Además, las diferencias entre los grupos solo Pilates y control activo con respecto al grupo sedentario también resultan significativas. Conclusiones: En función de los resultados encontrados, la técnica Pilates puede ser de gran utilidad entre el profesorado ya que su práctica se asocia con mayores niveles de adherencia. Además, si se combina Pilates con otras actividades físico-deportivas aumenta la probabilidad de permanecer durante más tiempo activo, disfrutando así durante más tiempo de los beneficios que proporciona el ejercicio sobre la salud física, psicológica y social. Background: The analysis of identity with exercise is absolutely necessary to try to reverse the current trends of physical inactivity and promote the adhesion of physical sports programes. Therefore, the objective of this study is to analyse the levels of identification with physical exercise in a group of teachers who regularly do Pilates. Method: The methodology used in this research is cross-sectional and the sample size is consistent with previous studies that analyse Pilates. The sample consists of 52 teachers (39 women and 13 men); of which 14 exercised exclusively Pilates, 12 combined Pilates and other physical activities, 13 are considered sedentary and the other 13 did other activities different from Pilates, yoga and Tai Chi. The experimental group attended a weekly average of 3.23 days and 3.54 days the active control group Pilates. The average age of the sample is 36.98 years. Results: Statistically significant results show that the group of teachers that combines Pilates with other activities is the one that gets the highest levels of identification with exercise versus active and sedentary controls. Furthermore, differences between Pilates and active groups only with respect to sedentary control group are also significant. Conclusions: According to the results, the Pilates technique can be very useful among teachers because its practice is associated with higher levels of adherence. Also, if Pilates is combined with other physical and sports activities, the probability of remaining active for a longe period of time increases the benefits provided by exercise on physical, psychological and social health.
- Published
- 2016
6. Psychosocial health levels depending on the age of teachers
- Author
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Boix-Vilella, S., Alacreu-Crespo, A., Abad-Tortosa, D., Costa, R., and Serrano, M.A.
- Subjects
Job strain ,Job satisfaction ,Burnout ,Profesores ,Teachers ,Tensión laboral ,Satisfacción laboral - Abstract
Antecedentes: Los factores de riesgo psicosocial, especialmente el estrés laboral, afectan negativamente a la salud psicosocial de los profesores. La profesión docente se ha considerado un colectivo con alto riesgo de padecer burnout o el síndrome de quemarse por el trabajo lo que supone una disminución de la calidad de vida de los docentes. Este efecto, según autores, podría estar mediado por la edad. Por ello, el objetivo del presente trabajo es analizar los niveles de salud psicosocial de un grupo de profesores en función de su edad. Método: La muestra del estudio está formada por 74 profesores (11 hombres y 63 mujeres) de educación primaria y secundaria con una edad media de 38.16 años, divididos en cuatro rangos de edad utilizados previamente en otras investigaciones (de 20-30 años con 20 sujetos; de 31-40 años formado por 22 sujetos, de 41-50 años con 22 sujetos; de 51-65 compuesto por 10 sujetos). Todos ellos contestaron cuestionarios de burnout, job strain y satisfacción laboral. Resultados: Los resultados muestran como el grupo de profesores de 31-40 años obtiene mayores niveles de agotamiento que el grupo 41-50 años (p=0.024). Sin embargo este grupo muestra mayor nivel de satisfacción laboral con los servicios recibidos con respecto al grupo 51-65 años (p=0.012). Por último, también se dan diferencias en la variable uso de habilidades, de la escala Job Strain, entre los rangos de edad 20-30 y 51-65 (p=0.010). Conclusiones: Las puntuaciones más altas registradas, en la variable uso de habilidades, por el grupo más joven indica que la preparación universitaria recibida les permite afrontar mejor las exigencias del puesto. Los profesores con edades comprendidas entre los 31 y 40 años obtienen mayor satisfacción laboral con los servicios recibidos y además registran mayor agotamiento que el resto de los grupos. Background: Psychosocial risk factors, especially job stress, negatively affect the psychosocial health of teachers. The teaching profession has been considered a group at high risk of burnout which means a decrease in the quality of life of teachers. This effect, according to the authors, could be mediated by the age. Therefore, the objective of this study is to analyse the levels of psychosocial health of a group of teachers based on their age. Method: The sample consists of 74 teachers (11 men and 63 women) of primary and secondary education with an average age 38.16 years, divided in four age ranges previously used in other studies (20-30 years with 20 subject; 31-40 years compound of 22 subjects; 41-50 years with 22 subjects; 51-65 compound of 10 subjects). All they answered questionnaires about burnout, job strain and job satisfaction. Results: The results showed that teachers of the group of 31-40-years obtained higher levels of exhaustion that the group 41-50 years (p=0.024). However this group showed higher level of job satisfaction with the services received with respect to the group 51-65 years old (p=0.012). Finally, differences in the variable use of skills, Job Strain scale, also exist between the age ranges 20-30 and 51-65 (p=0.010). Conclusions: The highest scores showed, in the variable use of skills, for the younger group could indicate that the received university training enables them to better meet the demands of the job. Teachers aged between 31 and 40 years scored hight in job satisfaction with the services received and also have more exhaustion than the rest of the groups. Este estudio se ha realizado con la ayuda del proyecto de investigación (GV07/022) concedido por la Generalitat Valenciana.
- Published
- 2016
7. Niveles de salud psicosocial en función de la edad del profesorado
- Author
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Boix-Vilella, S., Alacreu-Crespo, A., Abad-Tortosa, D., Costa, R., and Serrano, M.A.
- Subjects
Job strain ,Job satisfaction ,Burnout ,Profesores ,Teachers ,Tensión laboral ,Satisfacción laboral - Abstract
Antecedentes: Los factores de riesgo psicosocial, especialmente el estrés laboral, afectan negativamente a la salud psicosocial de los profesores. La profesión docente se ha considerado un colectivo con alto riesgo de padecer burnout o el síndrome de quemarse por el trabajo lo que supone una disminución de la calidad de vida de los docentes. Este efecto, según autores, podría estar mediado por la edad. Por ello, el objetivo del presente trabajo es analizar los niveles de salud psicosocial de un grupo de profesores en función de su edad. Método: La muestra del estudio está formada por 74 profesores (11 hombres y 63 mujeres) de educación primaria y secundaria con una edad media de 38.16 años, divididos en cuatro rangos de edad utilizados previamente en otras investigaciones (de 20-30 años con 20 sujetos; de 31-40 años formado por 22 sujetos, de 41-50 años con 22 sujetos; de 51-65 compuesto por 10 sujetos). Todos ellos contestaron cuestionarios de burnout, job strain y satisfacción laboral. Resultados: Los resultados muestran como el grupo de profesores de 31-40 años obtiene mayores niveles de agotamiento que el grupo 41-50 años (p=0.024). Sin embargo este grupo muestra mayor nivel de satisfacción laboral con los servicios recibidos con respecto al grupo 51-65 años (p=0.012). Por último, también se dan diferencias en la variable uso de habilidades, de la escala Job Strain, entre los rangos de edad 20-30 y 51-65 (p=0.010). Conclusiones: Las puntuaciones más altas registradas, en la variable uso de habilidades, por el grupo más joven indica que la preparación universitaria recibida les permite afrontar mejor las exigencias del puesto. Los profesores con edades comprendidas entre los 31 y 40 años obtienen mayor satisfacción laboral con los servicios recibidos y además registran mayor agotamiento que el resto de los grupos. Background: Psychosocial risk factors, especially job stress, negatively affect the psychosocial health of teachers. The teaching profession has been considered a group at high risk of burnout which means a decrease in the quality of life of teachers. This effect, according to the authors, could be mediated by the age. Therefore, the objective of this study is to analyse the levels of psychosocial health of a group of teachers based on their age. Method: The sample consists of 74 teachers (11 men and 63 women) of primary and secondary education with an average age 38.16 years, divided in four age ranges previously used in other studies (20-30 years with 20 subject; 31-40 years compound of 22 subjects; 41-50 years with 22 subjects; 51-65 compound of 10 subjects). All they answered questionnaires about burnout, job strain and job satisfaction. Results: The results showed that teachers of the group of 31-40-years obtained higher levels of exhaustion that the group 41-50 years (p=0.024). However this group showed higher level of job satisfaction with the services received with respect to the group 51-65 years old (p=0.012). Finally, differences in the variable use of skills, Job Strain scale, also exist between the age ranges 20-30 and 51-65 (p=0.010). Conclusions: The highest scores showed, in the variable use of skills, for the younger group could indicate that the received university training enables them to better meet the demands of the job. Teachers aged between 31 and 40 years scored hight in job satisfaction with the services received and also have more exhaustion than the rest of the groups. Este estudio se ha realizado con la ayuda del proyecto de investigación (GV07/022) concedido por la Generalitat Valenciana.
- Published
- 2016
8. Legislación
- Author
-
Gueimonde Fernández, Miguel [0000-0002-0192-901X], Bañares Vilella, S., Collado, María Carmen, Gueimonde Fernández, Miguel, Gueimonde Fernández, Miguel [0000-0002-0192-901X], Bañares Vilella, S., Collado, María Carmen, and Gueimonde Fernández, Miguel
- Published
- 2016
9. Hypertonicity induced Cl- current in eel enterocyte is dependent on bicarbonate and calcium in the external bathing solutions
- Author
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LIONETTO, Maria Giulia, SCHETTINO, Trifone, GIORDANO M. E, VILELLA S, Lionetto, Maria Giulia, GIORDANO M., E, Vilella, S, and Schettino, Trifone
- Published
- 1999
10. Ca2+ involvement in the stimulation of eel intestine Cl- transport in response to hypertonic stress
- Author
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LIONETTO, Maria Giulia, SCHETTINO, Trifone, GIORDANO M. E, VILELLA S, Lionetto, Maria Giulia, GIORDANO M., E, Vilella, S, and Schettino, Trifone
- Published
- 1999
11. Attività acetilcolinesterasica in invertebrati acquatici nel lago Alimini Grande – Otranto (LE)
- Author
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CARICATO R, INGROSSO L, VILELLA S, LIONETTO, Maria Giulia, SCHETTINO, Trifone, Caricato, R, Ingrosso, L, Vilella, S, Lionetto, Maria Giulia, and Schettino, Trifone
- Published
- 1999
12. Biomarkers in the teleost fish Diplodus puntazzo: a study on animals from an unpolluted environment
- Author
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GIORDANO M. E, VILELLA S, STORELLI C, LIONETTO, Maria Giulia, SCHETTINO, Trifone, GIORDANO M., E, Lionetto, Maria Giulia, Vilella, S, Storelli, C, and Schettino, Trifone
- Published
- 1998
13. pH dependence of the carrier mediated L-proline uptake in brush border membrane vesicles isolated from eel intestine
- Author
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VILELLA S, INGROSSO L, LIONETTO M. G, ZONNO V, STORELLI C., SCHETTINO, Trifone, Vilella, Sebastiano, Ingrosso, L, Lionetto, Maria Giulia, Zonno, V, Schettino, T, Storelli, C., Vilella, S, LIONETTO M., G, and Schettino, Trifone
- Published
- 1998
14. Seasonal variations of biomarkers in the teleost fish Diplodus puntazzo from the brackish water pond, Acquatina (Lecce-Italy)
- Author
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GIORDANO M. E, VILELLA S, STORELLI C, LIONETTO, Maria Giulia, SCHETTINO, Trifone, GIORDANO M., E, Lionetto, Maria Giulia, Vilella, S, Storelli, C, and Schettino, Trifone
- Published
- 1998
15. ACUTE EFFECT OF CDCL ON NA-DEPENDENT TRANSPORT SYSTEMS PRESENT IN THE EEL KIDNEY BBMV
- Author
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VILELLA S, ZONNO V, INGROSSO L, STORELLI C., LIONETTO, Maria Giulia, SCHETTINO, Trifone, Vilella, S, Zonno, V, Ingrosso, L, Lionetto, Maria Giulia, Schettino, Trifone, and Storelli, C.
- Published
- 1997
16. Ionic transport in teleost osmoregulation
- Author
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STORELLI C, ACIERNO R, MAFFIA, Michele, MARSIGLIANTE, Santo, VERRI T, VILELLA S, LIONETTO, Maria Giulia, SCHETTINO, Trifone, Storelli, C, Acierno, R, Lionetto, Maria Giulia, Maffia, Michele, Marsigliante, Santo, Verri, T, Vilella, S, and Schettino, Trifone
- Published
- 1997
17. Acute effect of heavy metals on the brush border Na+/H+ antiporter of the eel renal absorbing cells
- Author
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VILELLA S, INGROSSO L, ZONNO V, STORELLI C., LIONETTO, Maria Giulia, SCHETTINO, Trifone, Vilella, Sebastiano, Ingrosso, L, Zonno, V, Lionetto, Mg, Schettino, T, Storelli, C., Vilella, S, Lionetto, Maria Giulia, and Schettino, Trifone
- Published
- 1997
18. Effect of cadmium on eel, Anguilla anguilla, osmoregulation mechanisms: an 'in vitro' study
- Author
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LIONETTO, Maria Giulia, SCHETTINO, Trifone, CAPPELLO M. S, VILELLA S, GIORDANO M. E, DE LUCA P, Lionetto, Maria Giulia, CAPPELLO M., S, Vilella, S, GIORDANO M., E, DE LUCA, P, and Schettino, Trifone
- Published
- 1997
19. Effects of CdCl2 on transepithelial electrical parameters in the intestine of the teleost fish, Anguilla anguilla
- Author
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LIONETTO, Maria Giulia, SCHETTINO, Trifone, VILELLA S, CAPPELLO M. S, STORELLI C, Lionetto, Maria Giulia, Vilella, S, CAPPELLO M., S, Storelli, C, and Schettino, Trifone
- Published
- 1996
20. Microbial and nutritional aspects on the production of live feeds in a fish farming industry
- Author
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De Donno, Maria Antonella, Lugoli, F, Bagordo, F, Vilella, S, Campa, A, Grassi, T, Guido, Marcello, De Donno, Maria Antonella, Lugoli, F, Bagordo, F, Vilella, S, Campa, A, Grassi, T, and Guido, Marcello
- Abstract
Aquaculture is an enterprise in constant development, in particular relating to its effect on the environment and also the quality of its products. It represents a valid alternative to traditional fishing, facing the increasing demand for fish products. To guarantee to the consumer a product of high nutritional, organoleptic and hygienic quality, it is fundamental to monitor every phase of the fish farming industry, isolating the potential risk points. For this reason there has been a rapid evolution of productive technique, particularly in the technology, artificial reproduction and feed sectors. The aim of this research has been the monitoring of the evolution of certain microbial and nutritional quality indexes (total micro- bial counts and lipid analysis on suspensions of Rotifers and Artemia, used as live feed) in the larval phase of the productive cycle of the farm raised fish, in an intensive system. The study has shown an increment in the total microbial counts in the fish farming industry within the production of Rotifers and Artemia, more evident in the suspensions of Rotifers. In addition the study has demonstrated that the maintenance phase, in the enrichment protocol, can reduce the EPA and DHA content. The results confirm the importance of microbial and nutritional control of the live feeds before they get supplied to fish larvae.
- Published
- 2010
21. Human chorionic gonadotropin induces spermatogenesis and spermiation in 1-year-old European sea bass (Dicentrarchus labrax): Assessment of sperm quality
- Author
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Schiavone, R, Zilli, L, Vilella, S, Fauvel, Christian, Schiavone, R, Zilli, L, Vilella, S, and Fauvel, Christian
- Abstract
The aims of the present study were (a) to compare sperm quality (percentage of motile spermatozoa, motility duration, density and fertility after cryopreservation) between precocious and normally maturing male European sea bass Dicentrarchus labrax, (b) to examine the potential of human chorionic gonadotropin (hCG) to increase spermiation in precocious males and (c) to examine the potential of hCG to induce spermatogenesis and spermiation in non-precocious 1-year-old males. One hundred precocious and 100 non-precocious fish were each randomly divided in two groups each: control (precocious saline-treated and non precocious saline-treated) and treated (precocious hCG-treated and non precocious hCG-treated). Treated groups were administered weekly with 1000 IU hCG kg(-1) body weight while control groups were injected with physiological solution. Milt volume produced, sperm concentration, motility duration and fertilising ability were assessed every week in each group. The effect of the hormonal treatment on gonadal development was examined based on the gonadosomatic index and testicular histology. The results demonstrate that sperm produced by precocious fish has characteristics (mean value of motility class, mean maximum motility duration, concentration and fertility after cryopreservation) similar (P > 0.05) to those produced by 2-year-old fish. Human chorionic gonadotropin treatment in precocious fish resulted in a significant increase (P < 0.05) of milt volume, without affecting sperm quality. In non-precocious fish, hCG treatment resulted in greater percentage of spermiation (P < 0.05) compared to non-precocious saline-treated group. At the end of the trial (three weeks), 29 out of 50 non-precocious hCG-treated fish were spermiating and, within these 23 produced > 200 mu l per fish of milt. No differences were observed in terms of sperm concentration, motility class, motility duration and fertilizing capacity due to hCG treatment in either precocious, or non-prec
- Published
- 2006
- Full Text
- View/download PDF
22. An l-proline-dependent proton flux is located at the apical membrane level of the eel enterocytes
- Author
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Ingrosso, L., primary, Marsigliante, S., additional, Zonno, V., additional, Storelli, C., additional, and Vilella, S., additional
- Published
- 2000
- Full Text
- View/download PDF
23. Effect of cadmium and zinc on the Na+/H+ exchanger present on the brush border membrane vesicles isolated from eel kidney tubular cells
- Author
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Vilella, S, primary, Ingrosso, L, additional, Lionetto, M.G, additional, Schettino, T, additional, Zonno, V, additional, and Storelli, C, additional
- Published
- 2000
- Full Text
- View/download PDF
24. Effects of CdCl2 on electrophysiological parameters in the intestine of the teleost fish, Anguilla anguilla
- Author
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Lionetto, M.G, primary, Vilella, S, additional, Trischitta, F, additional, Cappello, M.S, additional, Giordano, M.E, additional, and Schettino, T, additional
- Published
- 1998
- Full Text
- View/download PDF
25. Inhibition of eel enzymatic activities by cadmium
- Author
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Lionetto, M. G., Giordano, M. E., Vilella, S., and Schettino, T.
- Published
- 2000
- Full Text
- View/download PDF
26. Microbial and nutritional aspects on the production of live feeds in a fish farming industry
- Author
-
Donno, A., Lugoli, F., Bagordo, F., Vilella, S., Campa, A., Tiziana Grassi, Guido, M., DE DONNO, Maria Antonella, Lugoli, Federica, Bagordo, Francesco, Vilella, Sebastiano, Campa, Annamaria, Grassi, Tiziana, and Guido, Marcello
- Abstract
Aquaculture is an enterprise in constant development, in particular relating to its effect on the environment and also the quality of its products. It represents a valid alternative to traditional fishing, facing the increasing demand for fish products. To guarantee to the consumer a product of high nutritional, organoleptic and hygienic quality, it is fundamental to monitor every phase of the fish farming industry, isolating the potential risk points. For this reason there has been a rapid evolution of productive technique, particularly in the technology, artificial reproduction and feed sectors. The aim of this research has been the monitoring of the evolution of certain microbial and nutritional quality indexes (total micro- bial counts and lipid analysis on suspensions of Rotifers and Artemia, used as live feed) in the larval phase of the productive cycle of the farm raised fish, in an intensive system. The study has shown an increment in the total microbial counts in the fish farming industry within the production of Rotifers and Artemia, more evident in the suspensions of Rotifers. In addition the study has demonstrated that the maintenance phase, in the enrichment protocol, can reduce the EPA and DHA content. The results confirm the importance of microbial and nutritional control of the live feeds before they get supplied to fish larvae., Journal of Preventive Medicine and Hygiene, Vol 51, No 1 (2010)
27. Microbiological stability in Sparus aurata in relation to farming system
- Author
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Donno, A., Rizzo, C., Francesco Bagordo, Liaci, D., Guido, M., Zonno, E., Vilella, S., Gabutti, G., DE DONNO, Maria Antonella, Rizzo, C, Bagordo, Francesco, Liaci, A, Guido, Marcello, Zonno, Vincenzo, Vilella, Sebastiano, and Gabutti, G.
- Subjects
Enterobacteriaceae ,Sparus aurata ,Shewanella putrefaciens ,Pseudomonas spp ,m Total Microbial Count
28. Salento Honey (Apulia, South-East Italy): A Preliminary Characterization by 1H-NMR Metabolomic Fingerprinting
- Author
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Sebastiano Vilella, Roberta Schiavone, Chiara Roberta Girelli, Francesco Paolo Fanizzi, Girelli, C. R., Schiavone, R., Vilella, S., and Fanizzi, F. P.
- Subjects
spectroscopic fingerprint ,nuclear magnetic resonance (NMR) ,Geography, Planning and Development ,Organoleptic ,TJ807-830 ,Metabolomic ,honey ,Honey production ,Multivariate statistical analysi ,Management, Monitoring, Policy and Law ,TD194-195 ,01 natural sciences ,Renewable energy sources ,0404 agricultural biotechnology ,Metabolomics ,South east ,Nectar ,GE1-350 ,multivariate statistical analysis ,Environmental effects of industries and plants ,biology ,Renewable Energy, Sustainability and the Environment ,fungi ,010401 analytical chemistry ,food and beverages ,Honey ,04 agricultural and veterinary sciences ,Building and Construction ,Pesticide ,biology.organism_classification ,metabolomics ,040401 food science ,0104 chemical sciences ,Environmental sciences ,Horticulture ,Spectroscopic fingerprint ,Proton NMR ,Xylella fastidiosa ,Nuclear magnetic resonance (NMR) - Abstract
Honey is a natural sweet substance produced by honeybees from the nectar of flowers, plant secretions or plant-sucking insect excretions. Sugars and water constitute the major components, other minor components characterize the organoleptic and nutritional properties. To date, Salento (Apulia region, Italy) honey production is considerably threatened due to the suggested use of neonicotinoids in order to control the insect-vectored bacterium Xylella fastidiosa (subsp. pauca). Metabolomics based on Nuclear Magnetic Resonance (NMR) spectroscopy was used to describe, for the first time, the composition of honey samples from different Salento producers. Exploratory Principal Component Analysis (PCA) showed, among the observed clustering, a separation between light and dark honeys and a discrimination according to producers, both further analyzed by supervised multivariate analysis. According to the obtained data, although limited to small-scale emerging production, Salento honey shows at the molecular level, a range of specific characteristic features analogous to those exhibited by similar products originating elsewhere and appreciated by consumers. The impact on this production should therefore be carefully considered when suggesting extensive use of pesticides in the area.
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- 2020
29. Hypertonicity stimulates Cl- transport in the intestine of fresh water (FW) adapted eel, Anguilla anguilla
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LIONETTO, Maria Giulia, GIORDANO M. E, VILELLA, Sebastiano, SCHETTINO T., LIONETTO M., G, GIORDANO M., E, Vilella, S, Schettino, Trifone, Lionetto, Maria Giulia, Vilella, Sebastiano, and Schettino, T.
- Published
- 1998
30. Assessing the Student Nurses' Knowledge of Oral Health Care.
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Marquès-Pellejà G, Roqueta-Vall-Llosera M, Cámara-Liebana D, Mantas-Jiménez S, Gelabert-Vilella S, Baltasar-Bagué A, and Reig-Garcia G
- Abstract
Oral health is crucial for the overall well-being and quality of life, and nurses play a significant role in promoting it. This study assessed the oral health knowledge of fourth-grade nursing degree students. Seventy-two students completed a questionnaire covering sociodemographic variables, oral health-related factors, knowledge about oral health, and perceptions of its importance and learning experiences. The results showed that 83.3% of students attended regular dental check-ups for preventive purposes, and 55.6% had visited a dentist during the last year. Most of the students reported experiencing cavities (66.7%) and undergoing orthodontic treatment (54.2%). The average knowledge score in oral health was 6.4 out of 10, and students recognized the importance of oral health in the nursing role. However, their knowledge acquired during their nursing degree scored relatively low, being 2.5 out of 5. Notably, students who valued problem-based learning achieved higher knowledge scores ( p < 0.05). Overall, fourth-grade nursing students demonstrated a moderate level of oral health knowledge. Improving oral health education within nursing curricula, particularly through problem-based learning, is essential to enhance their preparedness in addressing oral health issues effectively. This study was not registered.
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- 2023
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31. Emotional profiling and cognitive networks unravel how mainstream and alternative press framed AstraZeneca, Pfizer and COVID-19 vaccination campaigns.
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Semeraro A, Vilella S, Ruffo G, and Stella M
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- Cognition, Emotions, Humans, Immunization Programs, Vaccination adverse effects, Vaccination psychology, COVID-19 prevention & control, COVID-19 Vaccines adverse effects, Social Media, Vaccines
- Abstract
COVID-19 vaccines have been largely debated by the press. To understand how mainstream and alternative media debated vaccines, we introduce a paradigm reconstructing time-evolving narrative frames via cognitive networks and natural language processing. We study Italian news articles massively re-shared on Facebook/Twitter (up to 5 million times), covering 5745 vaccine-related news from 17 news outlets over 8 months. We find consistently high trust/anticipation and low disgust in the way mainstream sources framed "vaccine/vaccino". These emotions were crucially missing in alternative outlets. News titles from alternative sources framed "AstraZeneca" with sadness, absent in mainstream titles. Initially, mainstream news linked mostly "Pfizer" with side effects (e.g. "allergy", "reaction", "fever"). With the temporary suspension of "AstraZeneca", negative associations shifted: Mainstream titles prominently linked "AstraZeneca" with side effects, while "Pfizer" underwent a positive valence shift, linked to its higher efficacy. Simultaneously, thrombosis and fearful conceptual associations entered the frame of vaccines, while death changed context, i.e. rather than hopefully preventing deaths, vaccines could be reported as potential causes of death, increasing fear. Our findings expose crucial aspects of the emotional narratives around COVID-19 vaccines adopted by the press, highlighting the need to understand how alternative and mainstream media report vaccination news., (© 2022. The Author(s).)
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- 2022
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32. Evaluation and perceptions of a nursing discharge plan among nurses from different healthcare settings in Spain.
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Reig-Garcia G, Bonmatí-Tomàs A, Suñer-Soler R, Malagón-Aguilera MC, Gelabert-Vilella S, Bosch-Farré C, Mantas-Jimenez S, and Juvinyà-Canal D
- Subjects
- Aged, Delivery of Health Care, Humans, Nursing Homes, Spain, Patient Care Planning, Patient Discharge
- Abstract
Purpose: The exchange of information between different healthcare settings through a nursing discharge plan is essential for safe care. However, the factors contributing to achieving the most efficient exchange have not been well studied. This study aimed to evaluate and explore the perceptions of a nursing discharge plan from the perspective of nurses in different healthcare settings., Methods: A mixed methods approach comprising a specifically designed ad hoc questionnaire (n = 437) and a focus group session (n = 8)., Findings: Overall, 66.1% out of 437 nurses, and especially those working in nursing homes, were satisfied with the nursing discharge plan. Lack of time to complete the report and poor information about both nursing diagnoses and patients' social assessment were identified as problem areas. Some proposals emerged from the focus group: providing sufficient time for its completion, giving the nursing discharge plan a more flexible structure permitting more open-ended responses, requiring more information to be provided about the social and psychological situation of the patients, training nurses to use standardized language to avoid possible misinterpretations, and getting nurses from the different health care settings to work together in designing continuity of care plans. Elderly and low-income patients are found to need greater attention when filling out nursing discharge plans., Conclusions: The study has revealed key aspects that need to be improved and some recommendations in implementing the nursing discharge plan in our health area. These include that there should be more time provided to complete the NDP, and also specific details regarding the format, structure, content of the information that is communicated, and the prioritization of the patient profile., (© 2022. The Author(s).)
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- 2022
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33. Measuring user engagement with low credibility media sources in a controversial online debate.
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Vilella S, Semeraro A, Paolotti D, and Ruffo G
- Abstract
We quantify social media user engagement with low-credibility online news media sources using a simple and intuitive methodology, that we showcase with an empirical case study of the Twitter debate on immigration in Italy. By assigning the Twitter users an Untrustworthiness ( U ) score based on how frequently they engage with unreliable media outlets and cross-checking it with a qualitative political annotation of the communities, we show that such information consumption is not equally distributed across the Twitter users. Indeed, we identify clusters characterised by a very high presence of accounts that frequently share content from less reliable news sources. The users with high U are more keen to interact with bot-like accounts that tend to inject more unreliable content into the network and to retweet that content. Thus, our methodology applied to this real-world network provides evidence, in an easy and straightforward way, that there is strong interplay between accounts that display higher bot-like activity and users more focused on news from unreliable sources and that this influences the diffusion of this information across the network., Competing Interests: Competing interestsThe authors declare that they have no competing interests., (© The Author(s) 2022.)
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- 2022
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34. PyPlutchik: Visualising and comparing emotion-annotated corpora.
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Semeraro A, Vilella S, and Ruffo G
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- Humans, Software, Data Visualization, Emotions, Models, Psychological, Semantics
- Abstract
The increasing availability of textual corpora and data fetched from social networks is fuelling a huge production of works based on the model proposed by psychologist Robert Plutchik, often referred simply as the "Plutchik Wheel". Related researches range from annotation tasks description to emotions detection tools. Visualisation of such emotions is traditionally carried out using the most popular layouts, as bar plots or tables, which are however sub-optimal. The classic representation of the Plutchik's wheel follows the principles of proximity and opposition between pairs of emotions: spatial proximity in this model is also a semantic proximity, as adjacent emotions elicit a complex emotion (a primary dyad) when triggered together; spatial opposition is a semantic opposition as well, as positive emotions are opposite to negative emotions. The most common layouts fail to preserve both features, not to mention the need of visually allowing comparisons between different corpora in a blink of an eye, that is hard with basic design solutions. We introduce PyPlutchik the Pyplutchik package is available as a Github repository (http://github.com/alfonsosemeraro/pyplutchik) or through the installation commands pip or conda. For any enquiry about usage or installation feel free to contact the corresponding author, a Python module specifically designed for the visualisation of Plutchik's emotions in texts or in corpora. PyPlutchik draws the Plutchik's flower with each emotion petal sized after how much that emotion is detected or annotated in the corpus, also representing three degrees of intensity for each of them. Notably, PyPlutchik allows users to display also primary, secondary, tertiary and opposite dyads in a compact, intuitive way. We substantiate our claim that PyPlutchik outperforms other classic visualisations when displaying Plutchik emotions and we showcase a few examples that display our module's most compelling features., Competing Interests: The authors have declared that no competing interests exist.
- Published
- 2021
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35. Psychological State after an Acute Coronary Syndrome: Impact of Physical Limitations.
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Serrano-Rosa MÁ, León-Zarceño E, Giglio C, Boix-Vilella S, Moreno-Tenas A, Pamies-Aubalat L, and Arrarte V
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- Adaptation, Physiological, Adaptation, Psychological, Anxiety epidemiology, Depression epidemiology, Humans, Longitudinal Studies, Quality of Life, Stress, Psychological, Acute Coronary Syndrome
- Abstract
The aim of this study was to investigate how physical limitations after ACS influence patients' quality of life and health perception. This was a longitudinal clinical study. We recruited 146 patients diagnosed with ACS. The patients performed a stress test (Bruce's protocol) for the evaluation of physical limitations and were classified according to the test result: without physical limitations (more than 10 METS), with some physical limitations (7 to 9 METS), and with high physical limitations (less than 6 METS). Significant differences were found between the three groups immediately after the diagnosis of ACS and after a period of three months, regarding health perception, anxiety, depression, sexual relationships, distress, and adjustment to disease. These differences resulted larger between the group with less limitations and the group with higher limitations. After 3 months, however, there was an overall improvement in all variables. In conclusion, physical limitations after ACS seem to influence perceived quality of life determined by measuring general health, vitality, total adaptation, emotional role, social adaptation, depression, and anxiety. Therefore, the highest the physical limitations, the poorer the psychological conditions and vice versa, even 3 months after ACS diagnosis.
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- 2021
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36. Habits and Psychological Factors Associated With Changes in Physical Activity Due to COVID-19 Confinement.
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León-Zarceño E, Moreno-Tenas A, Boix Vilella S, García-Naveira A, and Serrano-Rosa MA
- Abstract
The confinement that COVID-19 has brought about has had a negative influence on people's psychological health. However, this impact is not widespread throughout the population, and men and women may be affected differently and it is not known what protective factors may exist. In this sense, physical activity has classically been shown to be a habit associated with psychological health. The study aimed to analyze the impact of confinement on psychological health (psychological well-being, coping, emotions, and perception of daily difficulties), taking into account gender, and perceived changes in physical activity. After the project was approved by the University's Ethics Commission, the participants, after signing the informed consent, completed the online questionnaires during the days from 6 to 20 April, the time when, in Spain, confinement was in place and the highest peak of deaths and infections from COVID-19 occurred. A total of 457 Spanish participants (247 men and 210 women) were evaluated in psychological well-being, in its adaptation to Spanish, in coping, with the Spanish adaptation of the COPE Inventory, in daily habits and difficulties ( ad hoc questionnaire) and the level of physical activity they had (sedentary, active, and federated players) was recorded. Besides, the perceived change in physical activity due to confinement was recorded. The results showed that perceived emotions, difficulties for certain routines, psychological well-being, and coping differed according to sex. On the other hand, depending on the change in physical activity habits, it was observed that participants who increased their physical activity responded differently in the perception of emotions, and difficulties for routines and in psychological well-being. Finally, differences were also observed in most variables between sedentary, active, and federated participants. Results are discussed highlighting the importance of physical activity as a moderating factor of the impact of confinement., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2021 León-Zarceño, Moreno-Tenas, Boix Vilella, García-Naveira and Serrano-Rosa.)
- Published
- 2021
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37. Healthy Ageing in Place: Enablers and Barriers from the Perspective of the Elderly. A Qualitative Study.
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Bosch-Farré C, Malagón-Aguilera MC, Ballester-Ferrando D, Bertran-Noguer C, Bonmatí-Tomàs A, Gelabert-Vilella S, and Juvinyà-Canal D
- Subjects
- Aged, Aged, 80 and over, Health Status, Humans, Independent Living statistics & numerical data, Qualitative Research, Spain, Healthy Aging
- Abstract
Background: Most elderly people wish to grow old at their own homes. The sociodemographic characteristics; home and neighbourhood conditions; and the social services support and networks are determinants in the possibility of "ageing in place". The present study aimed to explore the ageing in place phenomenon, as well as the enablers and barriers that interact in a healthy ageing from the perspective of the elderly connected to local entities., Methods: A generic qualitative design was proposed in the Health Region of Girona in Catalonia (Spain). Seventy-one elderly people were purposefully selected. Six focus groups were conducted, and data were thematically analysed., Results: Three key themes were generated: (1) Participants experienced ageing differently. The physical and mental health, the family environment and financial stability were key elements for life quality. (2) The perception of the elderly's role in the community depended on their age, health status and attitude towards life. (3) The participants identified several enablers and barriers to healthy ageing in place., Conclusions: The promotion of older people's autonomy and wellbeing, together with the creation of an active network of health and social services, may improve the possibility for elderly to age at home and avoid or delay institutionalisation.
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- 2020
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38. Prevalence and related factors of Active and Healthy Ageing in Europe according to two models: Results from the Survey of Health, Ageing and Retirement in Europe (SHARE).
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Bosch-Farré C, Garre-Olmo J, Bonmatí-Tomàs A, Malagón-Aguilera MC, Gelabert-Vilella S, Fuentes-Pumarola C, and Juvinyà-Canal D
- Subjects
- Activities of Daily Living, Aged, Aged, 80 and over, Cross-Sectional Studies, Europe, Female, Humans, Male, Middle Aged, Prevalence, Risk Factors, Health Surveys, Healthy Aging, Models, Statistical, Retirement statistics & numerical data
- Abstract
Background: Active and Healthy Ageing (AHA) is the process of optimizing opportunities related to health, participation, and safety in order to improve quality of life. The approach most often used to measure AHA is Rowe and Kahn's Satisfactory Ageing model. Nonetheless, this model has limitations. One of the strategic objectives of the WHO Global Strategy and Action Plan (2016) is to improve Healthy Ageing measurement. Our objectives were to compare two models of assessing AHA and further compare the results by country and sociodemographic variables., Methods: This was a cross-sectional, observational analysis of a representative sample of the general population aged 50 years and older in Europe. The data analysed were obtained by the Study of Health, Ageing and Retirement in Europe (SHARE). The dependent variable was AHA and its dimensions, measured using the Rowe and Kahn AHA model (AHA-B) and the authors' model based on the WHO definition (AHA-BPS). A descriptive analysis and multivariate models of binary logistical regression were developed., Results: The sample consisted of 52,641 participants (mean age 65.24 years [SD = 10.18; Range = 50-104], 53.2% women). Healthy Ageing prevalence in the AHA-B model was 23.5% (95%CI = 23.1%-23.9%). In the AHA-BPS model, this prevalence was 38.9%. In both models, significant variations were observed between countries, and were distributed along a north-western to south-eastern gradient. The sociodemographic variables associated with the absence of AHA were advanced age, female sex, death of spouse, low educational level, lack of employment, and low financial status. Comparing the two models, the strength of association between absence of AHA and advanced age (85 years and older) was four times greater in the AHA-B model., Conclusions: Our results showing differences between these two models provide evidence that the AHA-BPS model does not penalize older age and is more likely to characterize AHA from a health promotion perspective., Competing Interests: The authors have declared that no competing interests exist.
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- 2018
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39. Reducing health inequities affecting immigrant women: a qualitative study of their available assets.
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Bonmatí-Tomás A, Malagón-Aguilera Mdel C, Bosch-Farré C, Gelabert-Vilella S, Juvinyà-Canal D, and Garcia Gil Mdel M
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- Female, Focus Groups, Health Promotion methods, Healthcare Disparities standards, Humans, Qualitative Research, Self Efficacy, Workforce, Emigrants and Immigrants psychology, Health Resources supply & distribution, Healthcare Disparities trends
- Abstract
Background: Immigrant women often experience health inequities, whether for reasons of gender, country of origin, or socioeconomic status. The view of immigrant women has always focussed on their needs, without taking into account their available assets. A salutogenic approach incorporating an assets analysis could provide a new perspective on the design of health promotion interventions to reduce health inequities. The study objective was to identify the assets of this group of women as a necessary first step in changing the paradigm used in such health promotion interventions., Methods: This qualitative study combined focus groups, in-depth interviews, and a photovoice session. The aim was to describe the assets of this group, based on Antonovsky's salutogenic approach and assets model. Qualitative results were interpreted with a phenomenological focus, identifying each individual's internal, community, and institutional assets., Results: The self awareness of skills was linked to a person's description of herself as being optimistic, having religious beliefs, and having motivations and objectives in life, for herself, her family or her children. Being motivated helped the women to persist in doing or learning things that could be useful in confronting difficult situations. Another selfawareness skill was feeling useful to others, whether this was due to religious beliefs about their role in life or to the importance of the mutual support of interpersonal relationships., Conclusions: High optimism, strong capacity for struggle and self-initiative, the importance of religious beliefs, social support, and concern for their children's future were described as assets of immigrant women. Identification of these assets allows us to develop more in-depth knowledge and better tools for health promotion programs and policies intended to reduce health inequities in this population of immigrant women.
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- 2016
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40. Comparative proteome analysis of cryopreserved flagella and head plasma membrane proteins from sea bream spermatozoa: effect of antifreeze proteins.
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Zilli L, Beirão J, Schiavone R, Herraez MP, Gnoni A, and Vilella S
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- Animals, Cell Membrane drug effects, Cell Membrane metabolism, Cell Survival drug effects, Cryoprotective Agents pharmacology, Electrophoresis, Gel, Two-Dimensional, Fertilization drug effects, Fish Proteins metabolism, Male, Mass Spectrometry, Sperm Head drug effects, Sperm Motility drug effects, Antifreeze Proteins pharmacology, Cryopreservation, Flagella metabolism, Membrane Proteins metabolism, Proteome metabolism, Proteomics methods, Sea Bream metabolism, Sperm Head metabolism
- Abstract
Cryopreservation induces injuries to fish spermatozoa that in turn affect sperm quality in terms of fertilization ability, motility, DNA and protein integrity and larval survival. To reduce the loss of sperm quality due to freezing-thawing, it is necessary to improve these procedures. In the present study we investigated the ability of two antifreeze proteins (AFPI and AFPIII) to reduce the loss of quality of sea bream spermatozoa due to cryopreservation. To do so, we compared viability, motility, straight-line velocity and curvilinear velocity of fresh and (AFPs)-cryopreserved spermatozoa. AFPIII addition to cryopreservation medium improved viability, motility and straight-line velocity with respect to DMSO or DMSO plus AFPI. To clarify the molecular mechanism(s) underlying these findings, the protein profile of two different cryopreserved sperm domains, flagella and head plasma membranes, was analysed. The protein profiles differed between fresh and frozen-thawed semen and results of the image analysis demonstrated that, after cryopreservation, out of 270 proteins 12 were decreased and 7 were increased in isolated flagella, and out of 150 proteins 6 showed a significant decrease and 4 showed a significant increase in head membranes. Mass spectrometry analysis identified 6 proteins (4 from isolated flagella and 2 present both in flagella and head plasma membranes) within the protein spots affected by the freezing-thawing procedure. 3 out of 4 proteins from isolated flagella were involved in the sperm bioenergetic system. Our results indicate that the ability of AFPIII to protect sea bream sperm quality can be, at least in part, ascribed to reducing changes in the sperm protein profile occurring during the freezing-thawing procedure. Our results clearly demonstrated that AFPIII addition to cryopreservation medium improved the protection against freezing respect to DMSO or DMSO plus AFPI. In addition we propose specific proteins of spermatozoa as markers related to the procedures of fish sperm cryopreservation.
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- 2014
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41. Subcellular localization of selectively permeable aquaporins in the male germ line of a marine teleost reveals spatial redistribution in activated spermatozoa.
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Chauvigné F, Boj M, Vilella S, Finn RN, and Cerdà J
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- Animals, Aquaporins genetics, Male, Phylogeny, Sea Bream, Sperm Motility genetics, Spermatogenesis genetics, Aquaporins metabolism, Germ Cells metabolism, Spermatozoa metabolism
- Abstract
In oviparous vertebrates such as the marine teleost gilthead seabream, water and fluid homeostasis associated with testicular physiology and the external activation of spermatozoa is potentially mediated by multiple aquaporins. To test this hypothesis, we isolated five novel members of the aquaporin superfamily from gilthead seabream and developed paralog-specific antibodies to localize the cellular sites of protein expression in the male reproductive tract. Together with phylogenetic classification, functional characterization of four of the newly isolated paralogs, Aqp0a, -7, -8b, and -9b, demonstrated that they were water permeable, while Aqp8b was also permeable to urea, and Aqp7 and -9b were permeable to glycerol and urea. Immunolocalization experiments indicated that up to seven paralogous aquaporins are differentially expressed in the seabream testis: Aqp0a and -9b in Sertoli and Leydig cells, respectively; Aqp1ab, -7, and -10b from spermatogonia to spermatozoa; and Aqp1aa and -8b in spermatids and sperm. In the efferent duct, only Aqp10b was found in the luminal epithelium. Ejaculated spermatozoa showed a segregated spatial distribution of five aquaporins: Aqp1aa and -7 in the entire flagellum or the head, respectively, and Aqp1ab, -8b, and -10b both in the head and the anterior tail. The combination of immunofluorescence microscopy and biochemical fractionation of spermatozoa indicated that Aqp10b and phosphorylated Aqp1ab are rapidly translocated to the head plasma membrane upon activation, whereas Aqp8b accumulates in the mitochondrion of the spermatozoa. In contrast, Aqp1aa and -7 remained unchanged. These data reveal that aquaporin expression in the teleost testis shares conserved features of the mammalian system, and they suggest that the piscine channels may play different roles in water and solute transport during spermatogenesis, sperm maturation and nutrition, and the initiation and maintenance of sperm motility.
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- 2013
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42. Improving sperm cryopreservation with antifreeze proteins: effect on gilthead seabream (Sparus aurata) plasma membrane lipids.
- Author
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Beirão J, Zilli L, Vilella S, Cabrita E, Schiavone R, and Herráez MP
- Subjects
- Animals, Cell Membrane metabolism, Cell Survival drug effects, Dimethyl Sulfoxide pharmacology, Fatty Acids metabolism, Fatty Acids, Unsaturated metabolism, Male, Sperm Head drug effects, Sperm Head ultrastructure, Sperm Tail drug effects, Sperm Tail ultrastructure, Antifreeze Proteins pharmacology, Cell Membrane drug effects, Cryopreservation methods, Cryoprotective Agents pharmacology, Membrane Lipids metabolism, Perciformes metabolism, Semen Preservation methods
- Abstract
Changes in the plasma membrane lipid composition have been related to a decrease in sperm quality during cryopreservation. Antifreeze proteins (AFPs) have been tested in different species because of their ability to depress the freezing point and their potential interaction with membranes, but controversial effects were reported. In the present study we analyzed separately the lipid composition of two sperm membrane domains, head plasma membrane (HM) and flagellar membrane (FM), after cryopreservation with an extender containing 5% dimethyl sulfoxide (DMSO) either alone or with AFPI or AFPIII (1 μg/ml). We used sperm from a teleost, Sparus aurata, because the lack of acrosome avoids changes of lipid profiles due to capacitation process or acrosomal losses during freezing/thawing. Comparing with the control (cryopreservation with 5% DMSO alone), the addition of AFPIII increased the velocity, linearity of movement, and percentage of viable cells. In addition, freezing with DMSO alone increased the phosphatidyl-serine content as well as the saturated fatty acids and decreased the unsaturated ones (mainly polyunsaturated) both in HM and FM. These changes in the lipid components were highly avoided with the addition of AFPIII. HM had a higher amount of saturated fatty acids than FM and was more affected by cryopreservation without AFPs. The percentage of viable cells was positively correlated with the amount of unsaturated fatty acids in the HM, whereas the motility parameters were positively correlated with both FM and HM amount of unsaturated fatty acids. AFPs, especially AFPIII, seem to have interacted with unsaturated fatty acids, stabilizing the plasma membrane organization during cryopreservation and contributing to improve sperm quality after thawing.
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- 2012
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43. Evidence for the involvement of aquaporins in sperm motility activation of the teleost gilthead sea bream (Sparus aurata).
- Author
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Zilli L, Schiavone R, Chauvigné F, Cerdà J, Storelli C, and Vilella S
- Subjects
- Animals, Blotting, Western, Dose-Response Relationship, Drug, Image Processing, Computer-Assisted, Immunohistochemistry, Male, Mercuric Chloride pharmacology, RNA, Messenger metabolism, Reverse Transcriptase Polymerase Chain Reaction, Spermatozoa drug effects, Video Recording, Aquaglyceroporins metabolism, Aquaporin 1 metabolism, Sea Bream physiology, Sperm Motility physiology, Spermatozoa metabolism
- Abstract
The expression of aquaporins in the spermatozoa of the marine teleost gilthead sea bream (Sparus aurata) and their involvement in the motility activation process were investigated. Sperm motility was activated by a hyperosmotic shock, but it was completely inhibited by 10 microM HgCl(2), such inhibition being partially recovered by beta-mercaptoethanol (ME). Conventional RT-PCR using primers specific for S. aurata aquaglyceroporin (glp) and aquaporin 1a (aqp1a) demonstrated the presence of both mRNAs in spermatozoa. Heterologous expression in Xenopus laevis oocytes showed that 10 and 100 microM HgCl(2) equally inhibited water and solute transport through S. aurata aquaporin 1a and S. aurata aquaglyceroporin, but treatment with ME only recovered aquaporin 1a-mediated water permeability. Western blot analysis using isoform-specific antisera on protein extracts from spermatozoa revealed bands that corresponded to the predicted molecular mass of S. aurata aquaglyceroporin (31 kDa) and S. aurata aquaporin 1a (28 kDa). The antisera also demonstrated that both aquaporins were localized in the head and flagellum of the spermatozoa. However, the immunoreaction at the plasma membrane of the spermatozoa head was more intense after the hyperosmotic activation, suggesting the translocation of both aquaporin 1a and aquaglyceroporin into the plasma membrane after the osmotic shock. This study therefore provides the first direct demonstration for the presence of aquaporins in fish sperm. The different sensitivities of S. aurata aquaporin 1a and S. aurata aquaglyceroporin to ME may explain the failure of this reducing agent to fully recover the mercurial inhibition of sperm motility, suggesting that these aquaporins may play different physiological roles during the activation and maintenance of sperm motility in sea bream.
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- 2009
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44. Molecular mechanisms determining sperm motility initiation in two sparids (Sparus aurata and Lithognathus mormyrus).
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Zilli L, Schiavone R, Storelli C, and Vilella S
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- Animals, Calcium pharmacology, Cyclic AMP physiology, Cyclic AMP-Dependent Protein Kinases metabolism, Cyclic AMP-Dependent Protein Kinases physiology, Male, Osmolar Concentration, Potassium pharmacology, Proteome analysis, Sperm Motility drug effects, Spermatozoa chemistry, Spermatozoa metabolism, Sea Bream metabolism, Sea Bream physiology, Sperm Motility physiology
- Abstract
Molecular mechanisms involved in sperm motility initiation in two sparids (Sparus aurata and Lithognathus mormyrus) have been studied. Our comparative study demonstrates that osmolality is the key signal in sperm motility activation in both species, whereas K(+) and Ca(2+) do not have any role. The straight-line velocity that resulted, however, was significantly different when measured in sperm activated with non-ionic and/or calcium-free solutions with respect to that measured in seawater-activated sperm. In both species, motility initiation depends on cAMP-dependent protein phosphorylation. The phosphorylation/dephosphorylation patterns that resulted in gilthead and striped sea bream were quite different. In gilthead sea bream, the phosphorylated proteins have molecular weights of 174, 147, 138, 70, and 9-15 kDa, whereas the dephosphorylated proteins have molecular weights of 76, 57, and 33 kDa. In striped sea bream, phosphorylation after sperm motility activation occurred on proteins of 174, 147, 103, 96, 61, 57, and 28 kDa, whereas only one protein of 70 kDa resulted from dephosphorylation. Matrix-assisted laser desorption ionization-time of flight analyses allowed identification of the following proteins: In gilthead sea bream, the 9-15 kDa proteins that were phosphorylated after motility activation include an A-kinase anchor protein (AKAP), an acetyl-coenzyme A synthetase, and a protein phosphatase inhibitor, and in striped sea bream, 103- and 61-kDa proteins that were phosphorylated after motility activation were identified as a phosphatase (myotubularin-related protein 1) and a kinase (DYRK3), respectively.
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- 2008
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45. Analysis of calcium concentration fluctuations in hepatopancreatic R cells of Marsupenaeus japonicus during the molting cycle.
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Zilli L, Schiavone R, Storelli C, and Vilella S
- Subjects
- Adenosine Triphosphatases metabolism, Animals, Cytoplasm metabolism, Fura-2, Mitochondria metabolism, Penaeidae metabolism, Spectrometry, Fluorescence, Calcium metabolism, Hepatopancreas metabolism, Molting physiology, Penaeidae physiology
- Abstract
In this study we examined the fluctuations of the intracellular calcium concentration in isolated hepatopancreatic R cells during the four molting stages of the prawn Marsupenaeus japonicus. In addition, we used the Fura-2-AM fluorescence technique to investigate the release of calcium from mitochondria and ATP-sensitive calcium stores (endoplasmic reticulum (ER), Golgi, and nucleus) into cytoplasm during the molting cycle. Results demonstrate that both the cytosolic free calcium concentration and the total cell calcium (free, bound to calcium-binding proteins, and stored in amorphous form) in the R cells strictly depend upon the molting cycle. Interestingly, the total cell calcium was higher (approximately 10 mmol l(-1)) in postmolt than in premolt (approximately 1 mmol l(-1)) and intermolt (approximately 0.3 mmol l(-1)). The calcium released from mitochondria was higher during premolt than during postmolt and intermolt, but the amount of calcium released from ATP-sensitive calcium stores was similar during all four stages. All together, our results suggest that the mitochondria-ATP-sensitive calcium stores system does not play a key role in calcium storage during the molting cycle but that it is involved in transcellular calcium flux. We hypothesize that lysosome or membrane-clad concretion vacuoles could represent the main site of calcium storage in hepatopancreatic R cells.
- Published
- 2007
- Full Text
- View/download PDF
46. Effect of cryopreservation on sea bass sperm proteins.
- Author
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Zilli L, Schiavone R, Zonno V, Rossano R, Storelli C, and Vilella S
- Subjects
- Animals, Electrophoresis, Gel, Two-Dimensional, Fish Proteins isolation & purification, Male, Peptide Mapping, Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization, Xenopus Proteins isolation & purification, Zebrafish Proteins isolation & purification, Bass metabolism, Cryopreservation, Fish Proteins metabolism, Semen Preservation, Spermatozoa metabolism
- Abstract
In the present study we used two-dimensional polyacrylamide gel electrophoresis (2-DE) and matrix-associated laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry to verify whether the protein expression of sea bass sperm was affected by the cryopreservation procedure. The protein profiles differed between fresh and frozen-thawed semen as revealed by visual inspection and by image analysis software. We identified 163 spots in fresh sperm; among these, 13 were significantly decreased and 8 were absent in two-dimensional gel obtained with cryopreserved sperm. Five of these spots were analyzed with MALDI-TOF, but only three showed a significant match in the databases used in bio-informatics analysis (PeptIdent, Mascot, and MS-Fit). In particular, spot 5 showed homology with a novel protein of zebrafish (similar to SKB1 of human and mouse), spot 13 showed homology with amphibian G1/S-specific cyclin E2, and spot 20 showed homology with the hypothetical protein DKFZp566A1524 of Brachidanio rerio. The present work shows that the use of the cryopreservation procedure causes the degradation of sperm proteins and among these, two could be at least partially responsible for the observed decrease in sperm motility duration and the lower hatching rate of eggs fertilized with cryopreserved sperm.
- Published
- 2005
- Full Text
- View/download PDF
47. Adenosine triphosphate concentration and beta-D-glucuronidase activity as indicators of sea bass semen quality.
- Author
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Zilli L, Schiavone R, Zonno V, Storelli C, and Vilella S
- Subjects
- Animals, Biomarkers metabolism, Cryopreservation, Female, Fertilization physiology, Male, Semen Preservation, Adenosine Triphosphate metabolism, Bass metabolism, Glucuronidase metabolism, Semen metabolism
- Abstract
The most common parameters used to evaluate sperm quality are motility rate and duration and fertilization ability. In this study, chemical and biochemical parameters of sea bass (Dicentrarchus labrax) sperm were investigated to find an alternative method for evaluating sperm fertilization ability before and after cryopreservation. The biochemical and chemical analyses were performed with fresh and frozen-thawed sperm and seminal plasma. To cryopreserve sperm, 250-microl straws were used. Fertilization ability was evaluated by inseminating eggs (obtained from hormonally stimulated females) with fresh and cryopreserved sperm. The results revealed a linear relationship (P < 0.05) between semen fertilization capacity and some seminal plasma (beta-D-glucuronidase activity, potassium concentration) and sperm (ATP concentration, aspartate aminotransferase activity) parameters. Variations in semen fertilization rate could be best described by two multiple regression models: one including the sperm parameters and another including the seminal plasma parameters. For practical application, the use of simple regression models is of value. Fertilization rate in both fresh and cryopreserved sperm was reliably predicted by determining the ATP concentration or the beta-D-glucuronidase activity or both.
- Published
- 2004
- Full Text
- View/download PDF
48. An L-proline-dependent proton flux is located at the apical membrane level of the eel enterocytes.
- Author
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Ingrosso L, Marsigliante S, Zonno V, Storelli C, and Vilella S
- Subjects
- Animals, Carrier Proteins analysis, Cell Membrane chemistry, Cell Membrane drug effects, Hydrogen-Ion Concentration, Microvilli chemistry, Microvilli metabolism, Proline administration & dosage, Proline metabolism, Sodium pharmacology, Tritium, Amino Acid Transport Systems, Neutral, Anguilla, Carrier Proteins metabolism, Cell Membrane metabolism, Enterocytes ultrastructure, Intestinal Absorption drug effects, Proline pharmacology, Protons
- Abstract
This study has demonstrated the existence of an L-proline-dependent (Na independent) proton flux at the apical membrane level of the eel intestinal absorbing cells. Using isolated eel enterocytes and the pH-sensitive fluorescent dye 2', 7'-bis-(2-carboxyethyl)-5-(and-6)-carboxyfluorescein, acetoxymethyl ester (BCECF), it was shown that a 20 mM concentration of the imino acid L-proline in the extracellular medium determined an intracellular acidification of approximately 0.28 pH units. However, neither sucrose nor other amino acids were able to significantly acidify the resting intracellular pH. A hyperbolic relationship between extracellular proline concentration and intracellular proton accumulation was observed. Using both isolated brush-border and basolateral membrane vesicles, it was demonstrated that this proline-proton cotransport mechanism was located at the apical membrane level only. In addition, the existence of a coupling mechanism between proline and proton fluxes was demonstrated by the observation that, in brush-border membrane vesicles, the presence of a pH gradient (pH(in) > pH(out)) stimulated the uptake of L-proline.
- Published
- 2000
- Full Text
- View/download PDF
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