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Total protein composition of young and adult Biomphalaria alexandrina snails with different compatibilities to Schistosoma mansoni infection / Composición total de proteína en caracoles Biomphalaria alexandrina juveniles y adultos con distintas compatibilidades a la infección por Schistosoma mansoni
Sadaka, Hayam A; Abou-El-Naga, Iman F; Amer, Eglal I; Diab, Iman H; Khedr, Safaa I A.
  • Sadaka, Hayam A; Alexandria University. Faculty of Medicine. Medical Parasitology Department. EG
  • Abou-El-Naga, Iman F; Alexandria University. Faculty of Medicine. Medical Parasitology Department. EG
  • Amer, Eglal I; Alexandria University. Faculty of Medicine. Medical Parasitology Department. EG
  • Diab, Iman H; Alexandria University. Faculty of Medicine. Medical Biochemistry and Molecular Biology Department. EG
  • Khedr, Safaa I A; Alexandria University. Faculty of Medicine. Medical Parasitology Department. EG
Rev. biol. trop ; 64(4): 1747-1757, oct.-dic. 2016. tab, ilus
Article in English | LILACS | ID: biblio-958248
ABSTRACT
AbstractSchistosomiasis remains a disease of major global public health concern since it is a chronic and debilitating illness. The widely distributed Schistosoma mansoni that causes intestinal schistosomiasis represents a great threat. Its world-wide distribution is permitted by the broad geographic range of the susceptible species of its intermediate host, Biomphalaria, which serves as an obligatory host for the larval stage, at which humans get infected. The objectives were to identify the proteins responsible for the snails' compatibility outcome through differentiation between the total proteins among Biomphalaria alexandrina snails at different ages. The work was conducted on snails that differ in age and genetic backgrounds. Four subgroups (F1) from the progeny of self-reproduced susceptible and resistant snails (F0) were studied. Infection rates of these subgroups (young susceptible, adult susceptible, young resistant and adult resistant) were 90 %, 75 %, 40 % and 0 %, respectively. Using Sodium Dodecyl Sulphate Polyacrylamide Gel electrophoresis (SDS-PAGE), differences in protein expression were evaluated between adult and young snails of different subgroups. Dice similarity coefficient was calculated to determine the percentage of band sharing among the experimental subgroups. The results showed that the combination of similarities between age and compatibility status of the snails, lead to the highest similarity coefficient, followed by the combination of similarities of both genetic origin and age, even though they differ in the compatibility status. On the other hand, the differences in the genetic background, age and compatibility status, lead to the least similarity index. It was also found that the genetic background in young snails plays a major role in the determination of their compatibility, while the internal defense system has the upper hand in determining the level of adult compatibility. In conclusion, the findings of the present work highlight the great impact of the snail age in concomitance with the genetics and the internal defense in the determination of B. alexandrina/S.mansoni compatibility. Future works are recommended, as further characterization of the shared protein bands among the studied subgroups is needed to clarify their role in host-parasite relationship. Rev. Biol. Trop. 64 (4) 1747-1757. Epub 2016 December 01.
RESUMEN
ResumenLa esquistosomiasis es una enfermedad crónica y debilitante que constituye una problemática de salud pública a nivel mundial. Debido a que Schistosoma mansoni está ampliamente distribuida y a que es el causante de la esquistosomiasis intestinal representa una gran amenaza. Biomphalaria es el hospedero intermedio y obligatorio para el estado larval, presenta una amplia distribución geográfica e infecta al ser humano. El objetivo fue identificar las proteínas responsables del efecto de compatibilidad en caracoles Biomphalaria alexandrina de distintos estadios a través de la diferenciación del total de proteínas en ellos. La investigación se llevó a cabo con caracoles de diferentes edades y antecedentes genéticos. Se estudiaron cuatro subgrupos (F1) de la progenie de caracoles susceptibles y resistentes reproducidos asexualmente (F0). Las tasas de infección de estos subgrupos (juvenil susceptible, adulto susceptible, juvenil resistente, adulto resistente) fueron 90 %, 75 %, 40 % y 0 %, respectivamente. Con la electroforesis en gel de poliacrilamida en presencia de dodecilsulfato sódico (SDS-PAGE) se evaluaron las diferencias en la expresión proteica entre los caracoles juveniles y adultos de los distintos subgrupos. Se calculó el coeficiente de similitud de Dice para determinar el porcentaje de bandas compartidas entre los subgrupos experimentales. Los resultados mostraron que la combinación de similitudes entre la edad y el estado de compatibilidad de los caracoles genera el mayor coeficiente de similitud seguido por el de la combinación de similitudes tanto de la edad como del origen genético aunque varían en el estado de compatibilidad. Por otra parte, las diferencias en los antecedentes genéticos, la edad y el estado de compatibilidad generan el índice de similitud más bajo. También se encontró que el antecedente genético en caracoles juveniles es importante en la determinación de su compatibilidad, mientras que el sistema de defensa interno es el que determina el nivel de compatibilidad en adultos. En conclusión, los resultados de este trabajo resaltan la importancia de la edad del caracol en conjunto con la genética y la defensa interna para determinar la compatibilidad de B. alexandrina/S.mansoni. Se recomienda realizar futuros trabajos así como una mayor caracterización de las bandas proteicas compartidas entre los subgrupos estudiados para esclarecer su papel en la relación hospedero-parásito.
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Full text: Available Index: LILACS (Americas) Main subject: Biomphalaria / Schistosomiasis mansoni / Proteins Type of study: Prognostic study Limits: Animals Language: English Journal: Rev. biol. trop Journal subject: Biology / Tropical Medicine Year: 2016 Type: Article Affiliation country: Egypt Institution/Affiliation country: Alexandria University/EG

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Full text: Available Index: LILACS (Americas) Main subject: Biomphalaria / Schistosomiasis mansoni / Proteins Type of study: Prognostic study Limits: Animals Language: English Journal: Rev. biol. trop Journal subject: Biology / Tropical Medicine Year: 2016 Type: Article Affiliation country: Egypt Institution/Affiliation country: Alexandria University/EG