Molecular unveiling of Leishmania spp. parasites in feline squamous cell carcinoma: preliminary results
Resumo
Objectives: Feline leishmaniosis due to Leishmania infantum is an emerging vector-borne disease, often coexisting with other morbidities, including neoplasia. This study aims to explore the possible association between Leishmania spp. infection and squamous cell carcinoma (SCC) in cats, through the employment of advanced molecular techniques.
Material and Methods: Genomic DNA was extracted from 86 paraffin-embedded blocks containing feline biopsy lesions with a histopathological pattern compatible with SCC diagnosis. The presence of Leishmania DNA in SCC samples was screened using a nested-PCR protocol with primers targeting the parasites’ small ribosomal DNA (SSU-rDNA).
Results: Leishmania SSU-rDNA was identified in a sample (1.2%, 1/86) of an SCC located on the nasal planum of a 10-year-old female European Shorthair cat.
Conclusion: The molecular evidence of Leishmania parasites in a feline SCC reinforces the hypothesis that Leishmania infection may be associated with SCC. This finding highlights the need for further investigation into the role of Leishmania in the pathogenesis of SCC, as well as the importance of considering Leishmania infection in the differential diagnosis and treatment of this malignancy.
Keywords: Squamous cell carcinoma, Leishmania, DNA, Nested-PCR.
Funding: This study was supported by the Instituto Lusófono de Investigação e Desenvolvimento under the exploratory project “FELIS - Feline Exploration of Leishmania in Squamous Cell Carcinoma” (https://imvet.ulusofona.pt/investigacao).