Departamento de Farmacologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil.
Faculdade de Medicina do Mucuri, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Rua do Cruzeiro, nº 01, Bairro Jardim São Paulo, Teófilo Otoni 39803-371, MG, Brazil.
Int J Mol Sci. 2019 Sep 6;20(18):4373. doi: 10.3390/ijms20184373.
BACKGROUND: P1G10 is a cysteine proteolytic fraction from latex, obtained by chromatographic separation on Sephadex-G10 and ultrafiltration. This fraction enhances healing in different models of skin lesions, and displays a protective/healing effect against gastric ulcers, where it was suggested an antioxidant role. METHODS: We evaluated here the effect of topical treatment with P1G10, in mice lesions induced by UVB. RESULTS: After single exposure to 2.4 J cm UVB, P1G10 reduced erythema, increased cellularity of hypodermis, enhanced MPO activity and IL1β, and inhibited COX levels. These results point to an anti-inflammatory effect by P1G10. This fraction displayed antioxidant activity by reversing the depletion of glutathione (GSH), glutathione peroxidase (GSH-Px), superoxide dismutase (SOD) and reducing the catalase activity increased by UVB. These changes may be related to a reduction in MDA observed in groups treated with P1G10. P1G10 also inhibited MMP-9, caspase-3 and pkat while increasing p53 levels.
背景:P1G10 是从乳胶中分离得到的半胱氨酸蛋白水解物,通过 Sephadex-G10 色谱分离和超滤获得。该部分在不同的皮肤损伤模型中增强愈合,并显示出对胃溃疡的保护/愈合作用,其中提示具有抗氧化作用。
方法:我们在这里评估了 P1G10 对 UVB 诱导的小鼠损伤的局部治疗效果。
结果:单次暴露于 2.4 J cm 的 UVB 后,P1G10 可减少红斑,增加真皮细胞的数量,增加 MPO 活性和 IL1β,并抑制 COX 水平。这些结果表明 P1G10 具有抗炎作用。该部分通过逆转 UVB 引起的谷胱甘肽 (GSH)、谷胱甘肽过氧化物酶 (GSH-Px)、超氧化物歧化酶 (SOD) 的消耗和减少增加的过氧化氢酶活性显示出抗氧化活性。这些变化可能与用 P1G10 处理的组中观察到的 MDA 减少有关。P1G10 还抑制 MMP-9、caspase-3 和 pkat,同时增加 p53 水平。
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