Journal: Nature Communications
Article Title: Systemically administered wound-homing peptide accelerates wound healing by modulating syndecan-4 function
doi: 10.1038/s41467-023-43848-1
Figure Lengend Snippet: Migration of HaCaT keratinocytes on fibronectin in scratch wound assays, in the presence or absence of 10 µg/ml CAR or m CAR peptide. Cells were analysed over 17 h ( a – d ) or 20 h ( e – h ) by time-lapse microscopy. a – d HaCaT cells transfected with control siRNA (CTRL KD), human SDC4-targeting siRNA oligo #1 (SDC4 KD #1) or human SDC4-targeting siRNA oligo #2 (SDC4 KD #2). a Scratch wound closure, ( b ) speed at early phase of migration (Timepoint 0–5 h), ( c ) speed at late phase of migration (Late: Timepoint 12–17 h), and ( d ) representative migration tracks during late phase migration. See also Supplementary Movie and and Supplementary Fig. . Data are representative from one of four independent experiments. Values are means ± S.E.M. All statistical analyses are two-way ANOVA with Tukey’s multiple comparisons test. a n = 5–6 fields of view per condition (Ctrl KD: Nil & CAR n = 6; m CAR n = 5. SDC4 KD #1 & #2: Nil, CAR & m CAR n = 5); CTRL KD Nil vs CAR P = 1.383 × 10 −7 ; CTRL KD CAR vs m CAR P = 2.239 × 10 −6 ; CTRL KD CAR vs SDC4 KD #1 CAR P = 4.341 × 10 −6 ; CTRL KD CAR vs SDC4 KD #2 CAR P = 2.630 × 10 −5 . b , c n = 40–60 cells per condition. b Early phase: CTRL KD Nil vs CAR P = 9.808 × 10 −6 ; CTRL KD CAR vs m CAR P = 1.639 × 10 −9 . (c) Late phase: CTRL KD Nil vs CAR P = 2.520 × 10 −11 ; CTRL KD CAR vs m CAR P = 2.520 × 10 −11 . e – h HaCaT cells transfected with control siRNA (CTRL KD) or human ARF6-targeting siRNA. e Scratch wound closure, ( f ) speed at early phase of migration (Timepoint 0–5 h), ( g ) speed at late phase of migration (Late: Timepoint 15–20 h), and ( e ) representative migration tracks during late phase migration. See also Supplementary Movie and and Supplementary Fig. . Data are representative from one of four independent experiments. Values are means ± S.D. All statistical analyses are two-way ANOVA with Tukey’s multiple comparisons test. e n = 4–6 fields of view per condition (Ctrl KD: Nil n = 4, CAR n = 3; m CAR n = 5. ARF6 KD: Nil, CAR & m CAR n = 6); CTRL KD Nil vs CAR P = 6.312 × 10 −6 ; CTRL KD CAR vs m CAR P = 7.806 × 10 −5 ; CTRL KD CAR vs ARF6 KD CAR P = 1.636 × 10 −6 . f , g n = 49–60 cells per condition (Ctrl KD: Nil & CAR n = 60, m CAR n = 59. ARF6 KD: Nil n = 58, CAR & m CAR n = 49). f Early phase: CTRL KD Nil vs CAR P = 6.82 × 10 −13 ; CTRL KD CAR vs m CAR P = 0.0006; CTRL KD CAR vs ARF6 KD CAR P = 8.897 × 10 −6 ( g ) Late phase: CTRL KD Nil vs CAR P = 4.68 × 10 −13 ; CTRL KD CAR vs m CAR P = 4.68 × 10 −13 ; CTRL KD CAR vs ARF6 KD CAR P = 4.68 × 10 −13 ( a , e ) Each data point represents a single field of view; ( b , c , e , f ) Each data point represents an individual cell. Source data are provided as a file.
Article Snippet: Following permeabilisation with 0.1% (v/v) Triton X-100 for 10 min and blockade with 2% BSA in PBS - for 1 h, cells were incubated with either 5 μg/ml rabbit anti-ARF6 pAb (#PA1-093, Invitrogen) and 5 μg/ml mouse anti-CYTH2 mAb (10A12; #MA1-061, Pierce), or 10 μg/ml mouse anti-ARF6 mAb (3A-1; #sc-7971, Santa Cruz) and 5 μg/ml rabbit anti-IQSEC1 pAb (#PA5-38019, Invitrogen), in PBS - containing 0.5% (w/v) BSA and 0.05% TritonX-100 for 1 h. Primary antibodies were detected using 1:400 AlexaFluor-488 and −647-conjugated species-specific secondary antibodies and actin was detected using AlexaFluor-594-conjugated phalloidin (1:400; A12381, Invitrogen).
Techniques: Migration, Time-lapse Microscopy, Transfection, Control