The complex anatomy of the epidermis contains multiple adult stem cell populations, but the extent to which they functionally overlap during homeostasis, wound healing, and tumor initiation remains poorly defined. Here, we demonstrate that Lrig1(+ve) cells are highly proliferative epidermal stem cells. Long-term clonal analysis reveals that Lrig1(+ve) cells maintain the upper pilosebaceous unit...

The mammalian skin epidermis is a stratified epithelium composed of multiple layers of epithelial cells that exist in appropriate sizes and proportions, and with distinct boundaries separating each other. How the epidermis develops from a single layer of committed precursor cells to form a complex multilayered structure of multiple cell types remains elusive. Here, we construct stochastic, thre...

Gorlin syndrome (also known as basal cell nevus syndrome) is a hereditary condition characterized by development of numerous epidermal and follicular tumors. Mutations in theSHH signaling pathway are key drivers this disease. It currently unknown whether SHH mutations non-epidermal types play role phenotypes, the tumor microenvironment, or altered skin development. Through lineage tracing using...

BACKGROUND The goal of this study was to determine a predominant cell type expressing fractalkine receptor (CX3CR1) in mature ovarian teratomas and to establish functional significance of its expression in cell differentiation. METHODS Specimens of ovarian teratoma and human fetal tissues were analyzed by immunohistochemistry for CX3CR1expression. Ovarian teratocarcinoma cell line PA-1 was us...

10.1 The forbidden experiment Language and culture separate humans from all other species. No human group lacks either, which must mean that both are deeply seated in human nature. What are the essential ingredients of these two most human of attributes? Our central task as linguists is to try to answer this question for language. One strategy for tackling this problem is to trace all existing ...

background: mature t/ nk-cell neoplasms are a rare group of disorders and their presentation as leukemia is even rarer. most of the previous studies have focused on mature b-cell lineage leukemias and there is a paucity of data on mature t/nk-cell lineage leukemias. we, therefore, planned this study to analyze their spectrum, frequency, morphology and immunophenotypic features. methods: all cas...

undoubtedly, the legislator has paid special attention toward protection of lineage of persons so as the weakest evidence like lottery may be used to establish a lineage under the shiite jurisprudence. therefore, the value and credit of scientific evidence such as dna test in proving lineage is very clearly acceptable. but the point worth considering here is evaluating whether such scientific e...

Most somatic cells in the nematode Caenorhabditis elegans arise from AB, the anterior blastomere of the 2-cell embryo. While the daughters of AB, ABa and ABp, are equivalent in potential at birth, they adopt different fates as a result of their unique positions. One such difference is that the distribution of epidermal precursors arising from ABp is reversed along the anterior-posterior axis re...

B-lymphocyte-induced nuclear maturation protein 1 (BLIMP1) was previously reported to define a sebaceous gland (SG) progenitor population in the epidermis. However, the recent identification of multiple stem cell populations in the hair follicle junctional zone has led us to re-evaluate its function. We show, in agreement with previous studies, that BLIMP1 is expressed by postmitotic, terminall...

The epidermis is essential for animal survival, providing both a protective barrier and cellular sensor to external environments. The generally conserved embryonic origin of the epidermis, but the broad morphological and functional diversity of this organ across animals is puzzling. We define the transcriptional regulators underlying epidermal lineage differentiation in the planarian Schmidtea ...