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Pretreatment of Human Keratinocyte Sheets with Laminin 5 Improves their Grafting Efficiency
Akira Takeda, Kuniko Kadoya, Nobuyuki Shioya, Eiju Uchinuma Journal of Investigative Dermatology Volume 113, Issue 1, Pages (July 1999) DOI: /j x Copyright © 1999 The Society for Investigative Dermatology, Inc Terms and Conditions
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Figure 1 Vertical section of a keratinocyte sheet is stained positively with BM165 after exogenous application of laminin 5. This indicates that laminin 5 bound to keratinocyte sheets detached from the culture substrate by dispase (A), which was not seen in DMEM-treated sheets (B). Scale bar: 50 μm. Journal of Investigative Dermatology , 38-42DOI: ( /j x) Copyright © 1999 The Society for Investigative Dermatology, Inc Terms and Conditions
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Figure 2 Keratinocyte sheets attached and survived on the transplanted area at 7 d postgrafting. The skin flap (*) was elevated and the silicone gauze was removed. Arrows indicate the margin of the surviving keratinocyte sheet. Journal of Investigative Dermatology , 38-42DOI: ( /j x) Copyright © 1999 The Society for Investigative Dermatology, Inc Terms and Conditions
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Figure 3 Immunodetection of type IV collagen at the dermal–epidermal junction of grafts at 7 d postgrafting. Type IV collagen stained more strongly at the dermal–epidermal junction in group 1 (A) than in group 2 (B). Scale bars: 50 μm. Journal of Investigative Dermatology , 38-42DOI: ( /j x) Copyright © 1999 The Society for Investigative Dermatology, Inc Terms and Conditions
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Figure 4 Immunodetection of laminin 5 at the dermal–epidermal junction in grafts at 7 d postgrafting. Laminin 5 stains more strongly at the dermal–epidermal junction in group 1 (A) than in group 2 (B). Scale bars: 50 μm. Journal of Investigative Dermatology , 38-42DOI: ( /j x) Copyright © 1999 The Society for Investigative Dermatology, Inc Terms and Conditions
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Figure 5 Immunodetection of type VII collagen expression at the dermal–epidermal junction in immunostaining at 7 d postgrafting. Type VII collagen stains more strongly at the dermal–epidermal junction in group 1 (A) than in group 2 (B). Scale bar: 50 μm. Journal of Investigative Dermatology , 38-42DOI: ( /j x) Copyright © 1999 The Society for Investigative Dermatology, Inc Terms and Conditions
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Figure 6 The effect of exogenous laminin 5 on ultrastructural organization of the basement membrane zone of keratinocyte grafts at day 3 after grafting. The lamina densa of group 1 (A) is more continuous when compared with that of group 2 (B). Scale bars: 0.5 μm. This shows the early morphologic organization of basement membrane components caused by pretreatment of laminin 5. ld, lamina densa. In the immunodetection, type IV collagen (main component of lamina densa) was stained more strongly at the dermal–epidermal junction of grafts at 3 d postgrafting in group 1 (data not shown). The results of transmission electron microscopy correlate them. Journal of Investigative Dermatology , 38-42DOI: ( /j x) Copyright © 1999 The Society for Investigative Dermatology, Inc Terms and Conditions
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Figure 7 The effect of exogenous laminin 5 on ultrastructural organization of basement membrane zone at day 7 after grafting. Electron-dense plates characteristic of hemidesmosomes are observed in both groups. The regions of hemidesmosomes were a well-organized basement membrane structure consisting of attachment plaques, sub-basal dense plate, tonofilaments. The number of hemidesmosomes of group 1 were larger than that of group 2 in morphometrical observation. hd, hemidesmosome; ld, lamina densa; tf, tonofilament. Scale bars: 0.5 μm. Journal of Investigative Dermatology , 38-42DOI: ( /j x) Copyright © 1999 The Society for Investigative Dermatology, Inc Terms and Conditions
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