Volume 41 Issue 11
Nov.  2025
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Tang LJ,Fan LH,Wang JR,et al.Effect and mechanism of astaxanthin on the aging of high glucose-treated human skin fibroblasts[J].Chin J Burns Wounds,2025,41(11):1101-1110.DOI: 10.3760/cma.j.cn501225-20250109-00018.
Citation: Tang LJ,Fan LH,Wang JR,et al.Effect and mechanism of astaxanthin on the aging of high glucose-treated human skin fibroblasts[J].Chin J Burns Wounds,2025,41(11):1101-1110.DOI: 10.3760/cma.j.cn501225-20250109-00018.

Effect and mechanism of astaxanthin on the aging of high glucose-treated human skin fibroblasts

doi: 10.3760/cma.j.cn501225-20250109-00018
Funds:

National Key Clinical Specialty Discipline Construction Project of China Z155080000004

Shanghai Research Center of Rehabilitation Medicine (Top Priority Research Center of Shanghai) 2023ZZ02027

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  •   Objective  To investigate the effect and mechanism of astaxanthin on the aging of high glucose-treated human skin fibroblasts (Fbs).  Methods  The study was an experimental study. Human skin Fbs were collected and divided into control group with conventional culture, high glucose group treated with glucose at a final molarity of 30 mmol/L, and low astaxanthin group and high astaxanthin group pretreated with astaxanthin at final molarities of 25 and 50 μmol/L respectively and then treated as that in high glucose group. After 48 h of culture, the cell survival rate was detected by the cell counting kit-8, the reactive oxygen species level in cells was detected by the fluorescent probe method, the levels of malondialdehyde, glutathione, superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) in cells were detected by colorimetry, and the protein expression levels of p53, phosphorylated p53, p21, p16, Rb, phosphorylated Rb, matrix metalloproteinase 1 (MMP1), MMP3, and MMP13 in cells and nuclear factor-erythroid 2-related factor 2 (Nrf2) in cytoplasm and nucleus were detected by Western blotting. Another batch of human skin Fbs were collected and divided into control group, high glucose group, and high astaxanthin group which were treated as before, and high astaxanthin+ML385 group, which were pretreated with astaxanthin at a final molarity of 50 μmol/L and ML385 at a final molarity of 10 μmol/L respectively and then treated as that in high glucose group. After 48 h of culture, the cell survival rate, the protein expression levels of p53, phosphorylated p53, p21, p16, Rb, phosphorylated Rb, MMP1, MMP3, and MMP13 in cells and Nrf2 in cytoplasm and nucleus were detected as before. The sample number in all experiments above was 3.  Results  After 48 h of culture, compared with that in control group, the cell survival rate in high glucose group was significantly decreased (P<0.05); compared with that in high glucose group, the cell survival rates in low astaxanthin group and high astaxanthin group were significantly increased (P<0.05); compared with that in low astaxanthin group, the cell survival rate in high astaxanthin group was significantly increased (P<0.05). Compared with those in control group, the levels of reactive oxygen species and malondialdehyde in cells were significantly increased (P<0.05), while the levels of glutathione, SOD, CAT, and GSH-Px in cells were significantly decreased in high glucose group (P<0.05). Compared with those in high glucose group, the levels of reactive oxygen species and malondialdehyde in cells were significantly decreased (P<0.05), while the levels of CAT and GSH-Px in cells were significantly increased in low astaxanthin group (P<0.05); the levels of reactive oxygen species and malondialdehyde in cells were significantly decreased (P<0.05), while the levels of glutathione, SOD, CAT, and GSH-Px in cells were significantly increased in high astaxanthin group (P<0.05). Compared with those in low astaxanthin group, the levels of reactive oxygen species and malondialdehyde in cells were significantly decreased (P<0.05), while the levels of glutathione, CAT, and GSH-Px in cells were significantly increased in high astaxanthin group (P<0.05). Compared with those in control group, the protein expression levels of p53, p21, phosphorylated p53, p16, Rb, MMP1, MMP3, and MMP13 in cells were significantly increased (P<0.05), while the protein expression level of phosphorylated Rb in cells was significantly decreased in high glucose group (P<0.05). Compared with those in high glucose group, the protein expression levels of p53, p21, phosphorylated p53, and MMP13 in cells were significantly decreased (P<0.05), while the protein expression level of phosphorylated Rb in cells was significantly increased in low astaxanthin group (P<0.05); the protein expression levels of p53, p21, phosphorylated p53, p16, Rb, MMP1, MMP3, and MMP13 in cells were significantly decreased (P<0.05), while the protein expression level of phosphorylated Rb in cells was significantly increased in high astaxanthin group (P<0.05). Compared with those in low astaxanthin group, the protein expression levels of p21, phosphorylated p53, p16, Rb, and MMP1 in cells in high astaxanthin group were significantly decreased (P<0.05). Compared with those in control group and high astaxanthin group, the protein expression level of cytoplasmic Nrf2 was significantly increased (with P values both <0.05), while the protein expression level of nuclear Nrf2 was significantly decreased in high glucose group (with P values both <0.05). Compared with those in low astaxanthin group, the protein expression level of cytoplasmic Nrf2 was significantly increased in high glucose group (P<0.05); the protein expression level of cytoplasmic Nrf2 was significantly decreased (P<0.05), while the protein expression level of nuclear Nrf2 was significantly increased in high astaxanthin group (P<0.05). After 48 h of culture, compared with (100.0±6.0)% in control group, the cell survival rate was significantly decreased in high glucose group ((73.9±2.2)%, P<0.05); compared with that in high glucose group, the cell survival rate was significantly increased in high astaxanthin group ((93.8±1.5)%, P<0.05); compared with that in high astaxanthin group, the cell survival rate was significantly decreased in high astaxanthin+ML385 group ((71.7±2.7)%, P<0.05). Compared with those in control group and high astaxanthin group, the protein expression levels of p53, phosphorylated p53, p21, p16, Rb, MMP1, MMP3, and MMP13 in cells were significantly increased (P<0.05), while the protein expression level of phosphorylated Rb in cells was significantly decreased in high glucose group (with P values both <0.05); compared with those in high astaxanthin group, the protein expression levels of p53, phosphorylated p53, p21, p16, Rb, MMP1, and MMP13 in cells were significantly increased (P<0.05), while the protein expression level of phosphorylated Rb in cells was significantly decreased in high astaxanthin+ML385 group (P<0.05). Compared with that in control group, the protein expression level of cytoplasmic Nrf2 was significantly increased in high glucose group (P<0.05); compared with those in high glucose group, the protein expression level of cytoplasmic Nrf2 was significantly decreased (P<0.05), while the protein expression level of nuclear Nrf2 was significantly increased in high astaxanthin group (P<0.05); compared with that in high astaxanthin group, the protein expression level of nuclear Nrf2 was significantly decreased in high astaxanthin+ML385 group (P<0.05).  Conclusions  Astaxanthin can alleviate aging of high glucose-treated human skin Fbs by regulating Nrf2 nuclear translocation to inhibit oxidative stress and downregulate the expression of aging-related proteins.

     

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