Caracterização morfo-histoquímica de sarcoides equinos: Padrões de colágenos e suas possíveis vias de modulação celular
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Universidade Federal de Viçosa
Abstract
As alterações cutâneas proliferativas de natureza fibroblástica, como os sarcoides equinos, envolvem modificações na arquitetura estromal, que impactam diretamente na sua evolução clínica. Considerando a relevância dessas lesões e o efeito da comunicação celular na resposta do organismo às injúrias, esse trabalho se dividiu em dois capítulos. No primeiro, foi desenvolvido uma revisão sistemática a fim de investigar o papel dos exossomos na remodelação da pele e suas vias de ação. Os trabalhos abordados demonstraram a utilização dos exossomos como moduladores no processo de reparo tecidual e o seu potencial terapêutico na resolução clínica, por meio da sinalização das vias TGF-?2/SMAD2 e p38 MAPK. O segundo capítulo traz uma caracterização morfológica e a quantificação de colágeno em amostras de sarcoide equino, a fim de obter maior entendimento acerca da sua manifestação clínica e desenvolvimento. Foram observados crescimento dérmico, infiltração e predominância de colágeno tipo I. A articulação das duas etapas salienta a importância de desvendar os processos envolvidos em lesões proliferativas e instiga o potencial uso dos exossomos como biomarcadores de diagnóstico ou forma terapêutica. A escassez de estudos originais in vivo, especialmente voltados para a medicina veterinária, com padronização metodológica e investigação dos mecanismos moleculares e celulares envolvidos na regulação estromal evidencia a demanda por pesquisas mais aprofundadas e consistentes nesse campo. Palavras-chave: lesões proliferativas; fibroblastos; remodelação tecidual; exossomos
Proliferative cutaneous lesions of fibroblastic nature, such as equine sarcoids, involve modifications in stromal architecture that directly impact their clinical progression. Considering the relevance of these lesions and the effect of cell-to-cell communication on the organism’s response to injury, this work was structured into two chapters. The first chapter presents a systematic review aimed at investigating the role of exosomes in skin remodeling and their mechanisms of action. The studies demonstrated the use of exosomes as modulators in the tissue repair process and their therapeutic potential in clinical resolution, through signaling pathways such as TGF-ß2/SMAD2 and p38 MAPK. The second chapter offers a morphological characterization and collagen quantification in equine sarcoid samples, in order to gain a deeper understanding of their clinical manifestation and progression. Dermal expansion, infiltration, and a predominance of type I collagen were observed. The articulation between the two chapters highlights the importance of unraveling the processes involved in proliferative lesions and points to the potential use of exosomes as diagnostic biomarkers or therapeutic agents. The scarcity of original in vivo studies, especially in veterinary medicine, with standardized methodologies and investigation of the molecular and cellular mechanisms regulating the stroma, underscores the need for more in-depth and consistent research in this field. Keywords: proliferative lesions ; fibroblasts; tissue remodeling; exosomes
Proliferative cutaneous lesions of fibroblastic nature, such as equine sarcoids, involve modifications in stromal architecture that directly impact their clinical progression. Considering the relevance of these lesions and the effect of cell-to-cell communication on the organism’s response to injury, this work was structured into two chapters. The first chapter presents a systematic review aimed at investigating the role of exosomes in skin remodeling and their mechanisms of action. The studies demonstrated the use of exosomes as modulators in the tissue repair process and their therapeutic potential in clinical resolution, through signaling pathways such as TGF-ß2/SMAD2 and p38 MAPK. The second chapter offers a morphological characterization and collagen quantification in equine sarcoid samples, in order to gain a deeper understanding of their clinical manifestation and progression. Dermal expansion, infiltration, and a predominance of type I collagen were observed. The articulation between the two chapters highlights the importance of unraveling the processes involved in proliferative lesions and points to the potential use of exosomes as diagnostic biomarkers or therapeutic agents. The scarcity of original in vivo studies, especially in veterinary medicine, with standardized methodologies and investigation of the molecular and cellular mechanisms regulating the stroma, underscores the need for more in-depth and consistent research in this field. Keywords: proliferative lesions ; fibroblasts; tissue remodeling; exosomes
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MIRANDA, Natalie Nabelle Silva. Caracterização morfo-histoquímica de sarcoides equinos: Padrões de colágenos e suas possíveis vias de modulação celular. 2025. 34 f. Dissertação (Mestrado em Medicina Veterinária) - Universidade Federal de Viçosa, Viçosa. 2025.
