Publications associées à Kératinocyte

Low temperature and mTOR inhibition favor stem cell maintenance in human keratinocyte cultures

Kai Johnsson, Yann Barrandon, Johannes Alexander Mosig, Thomas Michael Braschler, Ariane Rochat, Jean-Baptiste Bureau, Fahd Azzabi Zouraq, Mako Kamiya

Adult autologous human epidermal stem cells can be extensively expanded ex vivo for cell and gene therapy. Identifying the mechanisms involved in stem cell maintenance and defining culture conditions to maintain stemness is critical, because an inadequate ...

WILEY2023

The Delivery of alpha 1-Antitrypsin Therapy Through Transepidermal Route: Worthwhile to Explore

Florian Maria Wurm

Human alpha 1-antitrypsin (AAT) is an abundant acute phase glycoprotein expressing anti-protease and immunomodulatory activities, and is used as a biopharmaceutical to treat patients with inherited AAT deficiency. The pleiotropic properties of AAT provide ...

FRONTIERS MEDIA SA2020

Role of Activin-A signaling in melanoma

Olivier Andreas Dubey

Cutaneous melanomas arise from transformed skin melanocytes. While accounting for only 1% of skin malignancies, melanoma is responsible for the majority of skin cancer-related deaths. Owing to lifestyle changes and increased exposure to sunlight, melanoma ...

EPFL2019

A balancing act between stratification and EMT in cultured human thymic epithelial cells

Matteo Pluchinotta

The thymus is the primary organ for T cell differentiation and maturation. Its stroma forms a characteristic sponge-like 3D structure mainly composed of thymic epithelial cells. Despite of this unconventional epithelial architecture, TECs express markers a ...

EPFL2016

Capturing epidermal stemness

Andrea Zaffalon

Regenerative medicine aims to replace or regenerate tissues or organs to re-establish their normal function. In 1975, Rheinwald and Green developed a technique to isolate and amplify epidermal stem cells. Their discovery led to the development of cultured ...

EPFL2016

Lymphotoxin-Dependent B Cell-FRC Crosstalk Promotes De Novo Follicle Formation and Antibody Production following Intestinal Helminth Infection

Nicola Harris, Ilaria Mosconi, Lalit Kumar Dubey, Luc Xavier Marie Lebon

Secondary lymphoid tissues provide specialized niches for the initiation of adaptive immune responses and undergo a remarkable expansion in response to inflammatory stimuli. Although the formation of B cell follicles was previously thought to be restricted ...

Elsevier2016

Cell motion predicts human epidermal stemness

Yann Barrandon

Image-based identification of cultured stem cells and noninvasive evaluation of their proliferative capacity advance cell therapy and stem cell research. Here we demonstrate that human keratinocyte stem cells can be identified in situ by analyzing cell mot ...

Rockefeller University Press2015

Faceted phospholipid vesicles tailored for the delivery of Santolina insularis essential oil to the skin

Davide Demurtas

The aim of this work was to formulate Santolina insularis essential oil-loaded nanocarriers, namely Penetration Enhancer containing Vesicles (PEVs), evaluate the physico-chemical features and stability, and gain insights into their ability to deliver the o ...

Elsevier Science Bv2015

Temperature impacts human epidermal stem cell behaviour through thermoTRPs and mTOR signalling

Johannes Alexander Mosig

Adult stem cells are characterized by their unique ability to self-renew and give rise to a progeny of specialized/differentiated cells. Therefore, they have a remarkable potential for regenerative medicine. However, the use of adult stem cells is restrain ...

EPFL2013

A Subpopulation of Smooth Muscle Cells, Derived from Melanocyte-Competent Precursors, Prevents Patent Ductus Arteriosus

Friedrich Beermann

Background: Patent ductus arteriosus is a life-threatening condition frequent in premature newborns but also present in some term infants. Current mouse models of this malformation generally lead to perinatal death, not reproducing the full phenotypic spec ...

Public Library of Science2013

Asymmetric Cell Division in the Skin

Wan-Hung Fan

An asymmetric cell division (ACD) is defined as a division that gives rise to two daughter cells with different fates. It is the most common type of division during development. Analogous to Drosophila neuroblasts, proteins involved in ACD such as Insc and ...

EPFL2012

Constitutive gray hair in Mice induced by Melanocyte-specific deletion of c-Myc

Friedrich Beermann, Karine Schouwey, Marzia Armaro

c-Myc is involved in the control of diverse cellular processes and implicated in the maintenance of different tissues including the neural crest. Here we report that c-Myc is particularly important for pigment cell development and homeostasis. Targeting c- ...

2012

Coat color dilution in mice because of inactivation of the melanoma antigen MART-1

Friedrich Beermann, Iraz Toprak Aydin

Melanoma antigen recognized by T cells 1 (MART-1) is a melanoma-specific antigen, which has been thoroughly studied in the context of immunotherapy against malignant melanoma and which is found only in the pigment cell lineage. However, its exact function ...

2012

The Role of LEKTI in the Fate Determination of Keratinocyte Stem Cells

Alessandro Wataru Amici

SPINK5 (serine protease inhibitor Kazal-type 5) encodes the proteinase inhibitor LEKTI (lympho-epithelial Kazal-type related inhibitor). In skin, LEKTI expression is restricted to the stratum granulosum of the epidermis and the inner root sheath of hair fo ...

EPFL2011

PAR2 absence completely rescues inflammation and ichthyosis caused by altered CAP1/Prss8 expression in mouse skin

Friedrich Beermann, Simona Frateschi, Anne Wilson, Roch-Philippe Charles

Altered serine protease activity is associated with skin disorders in humans and in mice. The serine protease channel-activating protease-1 (CAP1; also termed protease serine S1 family member 8 (Prss8)) is important for epidermal homeostasis and is thus in ...

Nature Research2011

RBP-Jκ-dependent Notch signaling enhances retinal pigment epithelial cell proliferation in transgenic mice

Freddy Radtke, Friedrich Beermann, Iraz Toprak Aydin

The Notch signaling pathway is an ubiquitous cell-cell interaction mechanism, which is essential in controlling processes like cell proliferation, cell fate decision, differentiation or stem cell maintenance. Recent data have shown that Notch signaling is ...

Nature Publishing Group2011

Differential roles of the pRb and Arf/p53 pathways in murine naevus and melanoma genesis

Friedrich Beermann

Summary We report on a systematic analysis of genotype-specific melanocyte UVR responses in transgenic mouse melanoma models along with tumour penetrance and comparative histopathology. pRb or p53 pathway mutations cooperated with Nras(Q61K) to transform m ...

2010

Identification of epidermal pdx1 expression discloses different roles of notch1 and notch2 in murine kras-induced skin carcinogenesis in vivo

Freddy Radtke

BACKGROUND: The Ras and Notch signaling pathways are frequently activated during development to control many diverse cellular processes and are often dysregulated during tumorigenesis. To study the role of Notch and oncogenic Kras signaling in a progenitor ...

Public Library of Science2010

Regulation of DHICA-mediated antioxidation by dopachrome tautomerase: Implication for skin photoprotection against UVA radiation

Friedrich Beermann

Dopachrome tautomerase (Dct) is a critical enzyme in the melanogenesis pathway that isomerizes the intermediate dopachrome to 5,6-dihydroxyindole-2-carboxylic acid (DHICA) and influences the proportion of DHICA monomer incorporated into the 5,6-dihydroxyin ...

Elsevier2010

Key roles for transforming growth factor beta in melanocyte stem cell maintenance

Friedrich Beermann

Melanocyte stem cells in the bulge area of hair follicles are responsible for hair pigmentation, and defects in them cause hair graying. Here we describe the process of melanocyte stem cell entry into the quiescent state and show that niche-derived transfo ...

2010