Journal: Frontiers in Cell and Developmental Biology
Article Title: Antiphotoaging effects of a group of antioxidant peptides through downregulating matrix metalloproteinases and inflammation factors
doi: 10.3389/fcell.2025.1649391
Figure Lengend Snippet: The antioxidant peptides suppressed UVB-induced depletion of collagen type I precursor (COL1A1). (A) Representative immunofluorescence images of COL1A1 photographed by confocal microscopy. COL1A1 was stained with Alexa Fluor 594-conjugated antibody (red), and nuclei were stained with DAPI (blue). Scale bar = 20 μm. Quantitation is shown on the right (B) . (*** P < 0.001, **** P < 0.0001, n = 4).
Article Snippet: Western blotting was performed to detect the protein expression of β-actin, MMP1, MMP2, MMP3, MMP9, JNK, p-JNK, p38, p-p38, IL-6, and IL-1β in HDF-a cells and mouse skin (β-actin, MMP2, MMP9, p38, phosphorylated p38 (p-p38), JNK, phosphorylated JNK (p-JNK) and alpha-1 type I collagen (COL1A1) were purchased from Cell Signaling Technology, Inc. (Boston, United States); MMP1 and MMP3 were acquired from Proteintech Group, Inc. (Wuhan, China)).
Techniques: Immunofluorescence, Confocal Microscopy, Staining, Quantitation Assay