Polysaccharide-rich hydrogel formulation combined with photobiomodulation repairs UV-induced photodamage in mice skin

Autor(es)

Grosso Neves, Lia Mara ; Parizotto, Nivaldo Antonio ; Tim, Carla Roberta ; Floriano, Elaine Medeiros ; Vianna Lopez, Renata F. ; Venancio, Tiago ; Fernandes, Joao Batista ; Cominetti, Marcia Regina

• Tipo de documento: Artigo Científico
• Fonte: WOUND REPAIR AND REGENERATION; v. 28, n. 5, p. 11-pg., 2020-06-26.

Resumo

Prolonged skin exposure to ultraviolet radiation (UVR) induces premature aging in both the epidermis and the dermis. Chronic exposure to UVR induces the activation of mitogen-activated protein kinase (MAPK) signaling pathway, activating c-Jun, c-Fos expression, and transcription factor of AP-1 activating protein. AP-1 activation results in the positive induction of matrix metalloproteinase (MMP) synthesis, which degrade skin collagen fibers. Polysaccharides from the fruit ofLycium barbarum(LBP fraction) have a range of activities and have been demonstrate to repair the photodamage. In different approaches, laser application aims to recover the aged skin without destroying the epidermis, promoting a modulation, called photobiomodulation (PBM), which leads to protein synthesis and cell proliferation, favoring tissue repair. Here we developed a topical hydrogel formulation from a polysaccharide-rich fraction ofLycium barbarumfruits (LBP). This formulation was associated with PBM (red laser) to evaluate whether the isolated and combined treatments would reduce the UVR-mediated photodamage in mice skin. Hairless mice were photoaged for 6 weeks and then treated singly or in combination with LBP and PBM. Histological, immunohistochemistry, and immunofluorescence analyses were used to investigate the levels of c-Fos, c-Jun, MMP-1, -2, and -9, collagen I, III, and FGF2. The combined regimen inhibited UVR-induced skin thickening, decreased the expression of c-Fos and c-Jun, as well as MMP-1, -2, and -9 and concomitantly increased the levels of collagen I, III, and FGF2. The PBM in combination with LBP treatment is a promising strategy for the repair of photodamaged skin, presenting potential clinical application in skin rejuvenation. (AU)

• Processo FAPESP: 13/27021-8 - Efeitos do extrato do fruto de Lycium barbarum L. e do laser vermelho na prevenção e tratamento do fotoenvelhecimento cutâneo em camundongos sem pelos SKH:hr-1
• Beneficiário: Lia Mara Grosso Neves
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 12/25299-6 - Estudos integrados para o controle de formigas cortadeiras
• Beneficiário: João Batista Fernandes
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 15/24940-8 - Avaliação da eficácia de mudanças estruturais do [10]-gingerol em combinação com o quimioterápico doxorubicina para o tratamento de câncer de mama: estudos in vitro e in vivo
• Beneficiário: Márcia Regina Cominetti
• Modalidade de apoio: Auxílio à Pesquisa - Regular