Identification of Lutzomyia longipalpis' using MALDI-TOF peptide/protein profiles.

Autor: Silva CMA; Universidade Federal do Oeste da Bahia (UFOB), Centro Multidisciplinar da Barra, Barra, Bahia, Brazil, 47100-000; Instituto Gonçalo Moniz, Fundação Oswaldo Cruz (IGM-FIOCRUZ), Salvador, Bahia, Brazil, 40296-710. Electronic address: calienemello@gmail.com., Dos Santos FN; Laboratório ThoMSon de Espectrometria de Massas, Instituto de Química, Universidade de Campinas (UNICAMP), Campinas, São Paulo, Brazil, 13083-970; Instituto de Química, Universidade Federal da Bahia (UFBA), Campus Universitário de Ondina, Salvador, Bahia, Brazil, 40170-290., Mota TF; Instituto Gonçalo Moniz, Fundação Oswaldo Cruz (IGM-FIOCRUZ), Salvador, Bahia, Brazil, 40296-710., Brodskyn CI; Instituto Gonçalo Moniz, Fundação Oswaldo Cruz (IGM-FIOCRUZ), Salvador, Bahia, Brazil, 40296-710., Fraga DBM; Instituto Gonçalo Moniz, Fundação Oswaldo Cruz (IGM-FIOCRUZ), Salvador, Bahia, Brazil, 40296-710; Universidade Federal da Bahia (UFBA), Escola de Medicina Veterinária e Zootecnia, Salvador, Bahia, Brazil, 40170-110., Magalhães-Junior JT; Universidade Federal do Oeste da Bahia (UFOB), Centro Multidisciplinar da Barra, Barra, Bahia, Brazil, 47100-000.
Jazyk: angličtina
Zdroj: Acta tropica [Acta Trop] 2024 Sep; Vol. 257, pp. 107303. Date of Electronic Publication: 2024 Jun 29.
DOI: 10.1016/j.actatropica.2024.107303
Abstrakt: Sand flies are vectors of great public health importance, since they constitute a group of hematophagous insects responsible for etiological agents transmission of zoonotic diseases such a visceral leishmaniasis. In face of the expansion of these diseases, efficient control strategies are needed which depend on comprehending the sand fly eco-epidemiology. In this regard, MALDI-TOF mass spectrometry has been used for bacteria, fungi and yeast detection studies through peptide/protein profiles. However, little is known about interference of biological factors associated with vector ecology, such as blood meal preferences and even sand fly age on the peptide/protein profiles. Thus, the present study aimed to evaluate the differences in peptide/protein profiles of the sand fly Lutzomyia longipalpis, by means of MALDI-TOF, due to the sand fly's age, sex, blood meal source and Leishmania infantum infection. Sample preparation was made removing both head and last abdomen segments keeping the thorax, its appendices and the rest of the abdomen. Five specimens per pool were used to obtain peptide/protein extract of which 1 μL solution was deposited over 1 μL MALDI matrix dried. Characteristic spectra were analyzed using principal coordinate analysis as well as indicator species analysis to discriminate differences in sand flies's peptide/protein profile by sex, age, blood meal source and L. infantum infection. The results show that the evaluated variables produced distinct peptide/protein profiles, demonstrated by the identification of specific diagnostic ions. It was found that the interference of biological factors should be taken into account when using the MALDI-TOF analysis of sand fly species identification and eco-epidemiological applications in field studies. Based on our results, we believe that it is possible to identify infected specimens and the source of blood meal in a collection of wild sand flies, serving to measure infectivity and understand the dynamics of the vector's transmission chain. Our results may be useful for epidemiological studies that look at the ecology of sand flies and leishmaniasis, as well as for raising awareness of biological characteristics' impact on peptide/protein profiles in sand fly species identification.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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