Effects of obesity-associated plasma markers on adipose stem cell function and epigenetic regulation

Autor(es)

Bispo, Andressa Franca Sousa ; Simao, Jussara de Jesus ; Moraes, Miguel Ambrizzi ; Abel, Ana Beatriz Marques ; Plata, Victor Tadeu Goncalves ; Telles, Monica Marques ; Santana, Andre Valente ; Volpe, Paula ; Armelin-Correa, Lucia Maria ; Alonso-Vale, Maria Isabel Cardoso

• Tipo de documento: Artigo Científico
• Fonte: OBESITY; v. N/A, p. 14-pg., 2025-06-16.

Resumo

ObjectiveThis study investigates the correlations between obesity-related plasma markers and epigenetic/inflammatory changes in white adipose tissue (WAT), focusing on adipose-derived stem cells (ASCs). We hypothesize that obesity modulates histone H3K27 marks, modified by demethylases (lysine-specific demethylase 6A and 6B [KDM6A/KDM6B]) and acetylases (CREB-binding protein [CREBBP]/histone acetyltransferase EP300), affecting ASC function.MethodsSerum and visceral WAT (omental region) was collected from male patients (n = 16, 30-50 years old) undergoing elective gastric or bariatric surgery. BMI and obesity markers were correlated with changes in ASCs (transcript expression, proliferation, and secretion) using reverse transcriptase-polymerase chain reaction.ResultsASCs from individuals with higher BMI exhibited slower proliferation, increased inflammatory profile, and reduced adipogenic potential, with lower expression of key adipogenic genes. H3K27 acetylase transcripts were also negatively correlated with adipogenesis regulators. Moreover, C-C motif chemokine 2 (CCL2) and KDM6A expression was higher in the group with obesity, as were CREBBP and EP300. Finally, leptin levels positively correlated with serum, WAT, and ASC CCL2 expression. In vitro, leptin exposure enhanced CCL2 expression/secretion and increased KDM6A/KDM6B and EP300 transcription.ConclusionsIn vitro leptin exposure enhanced CCL2 expression/secretion and increased KDM6A/KDM6B and EP300 transcription, highlighting how obesity-driven epigenetic mechanisms, including leptin-mediated pathways, disrupt ASC plasticity and perpetuate adipose tissue dysfunction, offering novel therapeutic targets for metabolic disease intervention. (AU)

• Processo FAPESP: 23/18371-7 - Deposição de marcas epigenéticas na lisina 27 da histona 3 (H3K27) em células tronco mesenquimais extraídas de TAB humano com obesidade
• Beneficiário: Miguel Ambrizzi Moraes
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 22/15127-5 - Modulação da via de NF-kB e repercussões sobre marcas epigenéticas em células adiposas: papel do Oncotherad®
• Beneficiário: Andressa Franca de Sousa Bispo
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 19/26240-4 - Vias de sinalização afetadas pelo óleo de peixe em células tronco derivadas do tecido adiposo (AdSCs) e adipócitos: correlação com alterações metabólicas, endócrinas e na adipogênese que repercutem em seus efeitos anti-Obesidade Hipertrófica
• Beneficiário: Jussara de Jesus Simão
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 19/13618-9 - Estudo da modulação da expressão de Ezh2 e de outros modificadores de H3K27 por fatores da transcrição NF-kB em células adiposas
• Beneficiário: Maria Isabel Cardoso Alonso-Vale
• Modalidade de apoio: Auxílio à Pesquisa - Regular