Senotherapeutic peptide treatment reduces biological age and senescence burden in human skin models

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Zonari, Alessandra ; Brace, Lear E. E. ; Al-Katib, Kallie ; Porto, William F. F. ; Foyt, Daniel ; Guiang, Mylieneth ; Cruz, Edgar Andres Ochoa ; Marshall, Bailey ; Gentz, Melissa ; Guimaraes, Gabriela Rapozo ; Franco, Octavio L. L. ; Oliveira, Carolina R. R. ; Boroni, Mariana ; Carvalho, Juliana L. L.

• Tipo de documento: Artigo Científico
• Fonte: NPJ AGING; v. 9, n. 1, p. 15-pg., 2023-05-22.

Resumo

Cellular senescence is known to play a role in age-related skin function deterioration which potentially influences longevity. Here, a two-step phenotypic screening was performed to identify senotherapeutic peptides, leading to the identification of Peptide (Pep) 14. Pep 14 effectively decreased human dermal fibroblast senescence burden induced by Hutchinson-Gilford Progeria Syndrome (HGPS), chronological aging, ultraviolet-B radiation (UVB), and etoposide treatment, without inducing significant toxicity. Pep 14 functions via modulation of PP2A, an understudied holoenzyme that promotes genomic stability and is involved in DNA repair and senescence pathways. At the single-cell level, Pep 14 modulates genes that prevent senescence progression by arresting the cell cycle and enhancing DNA repair, which consequently reduce the number of cells progressing to late senescence. When applied on aged ex vivo skin, Pep 14 promoted a healthy skin phenotype with structural and molecular resemblance to young ex vivo skin, decreased the expression of senescence markers, including SASP, and reduced the DNA methylation age. In summary, this work shows the safe reduction of the biological age of ex vivo human skins by a senomorphic peptide. (AU)

• Processo FAPESP: 17/22057-5 - Estudo dos efeitos fisiológicos e da herança transgeracional induzida por dieta rica em colesterol em Caenorhabditis elegans
• Beneficiário: Willian Goulart Salgueiro
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 17/01184-9 - CAMeLEOm: análise entre espécies dos efeitos metabólicos, na expectativa de vida e ômicas de miméticos de restrição dietética
• Beneficiário: Marcelo Alves da Silva Mori
• Modalidade de apoio: Auxílio à Pesquisa - Temático