Previous studies have shown that mouse dermis is composed of functionally distinct fibroblast lineages. To explore the extent of fibroblast heterogeneity in human skin, we used a combination of comparative spatial transcriptional profiling of human and mouse dermis and single-cell transcriptional profiling of human dermal fibroblasts. We show that there are at least four distinct fibroblast pop...

Blocks of 12.5- or 13.5-day embryonic mouse upper-lip dermis were introduced under the ectoderm of the extra-embryonic area of 2- to 3-day chick or duck embryos. Two kinds of ectopic cutaneous appendages were produced: either arrested feathers alone, or arrested feathers and full-grown feathers. The former developed in the ectoderm overlying the implanted mouse dermal cells, the latter formed i...

Commensal microbes on the skin surface influence the behaviour of cells below the epidermis. We hypothesized that bacteria or their products exist below the surface epithelium and thus permit physical interaction between microbes and dermal cells. Here to test this hypothesis, we employed multiple independent detection techniques for bacteria including quantitative PCR, Gram staining, immunoflu...

Dermal fibroblasts are a dynamic and diverse population of cells whose functions in skin in many respects remain unknown. Normal adult human skin contains at least three distinct subpopulations of fibroblasts, which occupy unique niches in the dermis. Fibroblasts from each of these niches exhibit distinctive differences when cultured separately. Specific differences in fibroblast physiology are...

Differential diagnosis of NLCS includes nevus sebaceous, skin tag or fibroepithelial polyp, neurofibroma, lymphangioma, lipofibroma, focal dermal hypoplasia (Goltz syndrome), lipomatosis, and Michelin tire baby syndrome.[2,4] Histopathological examination helps in the differentiation. There is absence of fat cells in the dermis in skin tag. In lipofibroma skin, appendages are absent in the derm...

The present paper deals with the thermal effect model of temperature distribution in dermal layers of elliptical shaped human limbs involving two uniformly perfused tumor in dermis layer. Here the tumor is characterized by uncontrolled rates of metabolic heat generation. The normal tissues are characterized by self controlled metabolic heat generation. It is assumed that first there was only on...