Publications by authors named "Isabella da Silva Masarin"
First evidence of gonadal hybrid dysgenesis in Chagas disease vectors (Hemiptera, Triatominae): gonad atrophy prevents events of interspecific gene flow and introgression.
Luísa Martins Sensato Azevedo Natália Regina Cesaretto Jader de Oliveira Amanda Ravazi Yago Visinho Dos Reis Isabella da Silva Masarin
Parasit Vectors
October 2023
Article Synopsis
- Hybridization among Triatoma species can affect their evolution and may lead to hybrid sterility, which is caused by gonadal dysgenesis (GD) or unviable gametes, but previous studies had not documented GD in triatomine hybrids.
- This study performed reciprocal crosses between Triatoma longipennis and Triatoma mopan, and while hybrids were created from one specific cross, further intercrosses and backcrosses yielded no offspring, confirming sterility.
- The findings revealed that the hybrids exhibited bilateral gonadal dysgenesis, with their male gonads being completely atrophied and devoid of germ cells, leading to the conclusion that GD is responsible for the observed sterility in these hybrids.
Cytogenetic Key to Identification of Triatominae Species Reported in an Outbreak Region of Oral Transmission of Chagas Disease in the Brazilian Northeast.
Emercio Felisberto Nhapulo Denis Vinícius de Mello Laura Poloto Cesaretto Julia Junqueira Alevi Daniel Cesaretto Cristal Isabella da Silva Masarin
Am J Trop Med Hyg
June 2023
Oral transmission from the consumption of processed food with triatomines and/or their feces infected with Trypanosoma cruzi prevails among recent cases of Chagas disease in Brazil. In Paraíba, a state of the Brazilian northeast, there was an outbreak caused by the consumption of sugarcane juice that resulted in 26 cases of infection and one death. Until now, 10 species of triatomines have been reported in this Brazilian state.
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- The study demonstrated that despite morphological similarities, distinct genetic and reproductive barriers exist between the species, confirming their separate identities.
- Experimental crossbreeding between these species showed no hybridization, indicating prezygotic reproductive isolation.
- The findings suggest that one species is the most evolved member of the complex, rather than just a chromatic variant of another.