Compared with the supernatant of control mesenchymal stromal cells (MSCs) (top right), the supernatant from MSCs treated with interferon‐γ and tumor necrois factor‐α (bottom left) accelerated the reepithelialization of cutaneous wound, as shown by the increased presence of proliferating keratinocytes. Sections of skin tissues obtained on day 6 post‐injury were immunostained for proliferating keratinocytes with antibodies against proliferating cell nuclear antigen (PCNA, red) and cytokeratin 14 (green). The nuclei were counterstained with DAPI (blue).

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封面

与对照间充质基质细胞（MSCs）的上清液相比（右上），干扰素-γ和肿瘤坏死因子-α处理的MSCs的上清液（左下）加速了皮肤伤口的再上皮形成，这表明增殖的角质形成细胞。在损伤后第6天获得的皮肤组织切片用抗增殖细胞核抗原（PCNA，红色）和细胞角蛋白14（绿色）的抗体免疫染色，以增殖角质形成细胞。细胞核用DAPI（蓝色）复染。