Search results for "epiderma"

The Influence of Microbiome Dysbiosis and Bacterial Biofilms on Epidermal Barrier Function in Atopic Dermatitis—An Update

2021

Atopic dermatitis (AD) is a common inflammatory dermatosis affecting up to 30% of children and 10% of adults worldwide. AD is primarily driven by an epidermal barrier defect which triggers immune dysregulation within the skin. According to recent research such phenomena are closely related to the microbial dysbiosis of the skin. There is growing evidence that cutaneous microbiota and bacterial biofilms negatively affect skin barrier function, contributing to the onset and exacerbation of AD. This review summarizes the latest data on the mechanisms leading to microbiome dysbiosis and biofilm formation in AD, and the influence of these phenomena on skin barrier function.

The Exosomes-derived EGFR Ligand Amphiregulin (AREG) is a new key player in Multiple Myeloma Bone Destruction

Il Mieloma Multiplo (MM) è caratterizzato dalla presenza di aree osteolitiche dovute alla presenza di plasmacellule (PC) neoplastiche che causano l'interruzione della normale omeostasi ossea, promuovendo l'attività degli osteoclasti (OC) ed inibendo la funzione degli (OB). Al momento, uno dei campi di ricerca nella fisiopatologia del MM è proprio lo studio dei meccanismi che regolano l’attività degli OC e degli OB così come l’identificazione di target terapeutici per la prevenzione ed il trattamento delle lesioni osteolitiche. Negli ultimi anni è emerso che le vescicole extracellulari (EV), ed in particolare gli esosomi, giocano un ruolo fondamentale nel mediare il cross-talk tra le cellule…

Configurable low-cost plotter device for fabrication of multi-color sub-cellular scale microarrays.

2014

We report on the construction and operation of a low-cost plotter for fabrication of microarrays for multiplexed single-cell analyses. The printing head consists of polymeric pyramidal pens mounted on a rotation stage installed on an aluminium frame. This construction enables printing of microarrays onto glass substrates mounted on a tilt stage, controlled by a Lab-View operated user interface. The plotter can be assembled by typical academic workshops from components of less than 15 000 Euro. The functionality of the instrument is demonstrated by printing DNA microarrays on the area of 0.5 squared centimeters using up to three different oligonucleotides. Typical feature sizes are 5 μm diam…

Vulvar Epidermal Inclusion Cyst as a Long-term Complication of Female Genital Mutilation

2016

We present a case report of a patient with epidermal inclusion cyst as a late complication of female genital mutilation (FGM). We describe the management of the patient, and a review of the literature. We report the clinical and pathological findings in a 37-year-old female patient from Nigeria, with a clitoral mass of 1 year duration. She declared to have an FGM since she was 5 years. The lesion was excised successfully with good cosmetic results. Histological examination revealed epidermal cyst with the presence of granular layer. An epidermal inclusion cyst can develop as a long-term consequence of FGM.

Regional and modular expression of morphogenetic factors in the demosponge Lubomirskia baicalensis

2008

Some sponges [phylum Porifera], e.g. the demosponges Lubomirskia baicalensis or Axinella polypoides, show an arborescent growth form. In the freshwater sponge L. baicalensis this morphotype is seen mostly in depths below 4 m while in more shallow regions it grows as a crust. The different growth forms are determined in nature very likely by water current and/or light. The branches of this species are composed of modules, arranged along the apical-basal axis. The modules are delimited by a precise architecture of the spicule bundles; longitudinal bundles originate from the apex of the earlier module, while at the basis of each module these bundles are cross-linked by traverse bundles under f…

Non-small cell lung cancer (NSCLC), EGFR downstream pathway activation and TKI targeted therapies sensitivity: Effect of the plasma membrane-associat…

2017

Adenocarcinoma of Non-Small Cell Lung Cancer (NSCLC) is a severe disease. Patients carrying EGFR mutations may benefit from EGFR targeted therapies (e.g.: gefitinib). Recently, it has been shown that sialidase NEU3 directly interacts and regulates EGFR. In this work, we investigate the effect of sialidase NEU3 overexpression on EGFR pathways activation and EGFR targeted therapies sensitivity, in a series of lung cancer cell lines. NEU3 overexpression, forced after transfection, does not affect NSCLC cell viability. We demonstrate that NEU3 overexpression stimulates the ERK pathway but this activation is completely abolished by gefitinib treatment. The Akt pathway is also hyper-activated upo…

In the literature: March 2016

2016

The way clones resistant to anti-EGFR (Epidermal Growth Factor Receptor) inhibition evolve in non-small cell lung cancer is far from being determined. In an international cooperative effort led by investigators at Johns Hopkins Hospital in Baltimore, the origin of acquired resistance mediated by the EGFRT790M mutation has been further elucidated. That mutation, recognised as gatekeeper and present in about 60% of pretreated cases with anti-EGFRs, could occur either from the selection of previously existing EGFR790M cell clones or by the evolution of originally EGFR790M-negative drug-tolerant cells. In a series of elegant experiments, the authors show that these drug-tolerant cells have a di…

The shell-forming proteome of Lottia gigantea reveals both deep conservations and lineage-specific novelties

2013

19 pages; International audience; Proteins that are occluded within the molluscan shell, the so-called shell matrix proteins (SMPs), are an assemblage of biomolecules attractive to study for several reasons. They increase the fracture resistance of the shell by several orders of magnitude, determine the polymorph of CaCO(3) deposited, and regulate crystal nucleation, growth initiation and termination. In addition, they are thought to control the shell microstructures. Understanding how these proteins have evolved is also likely to provide deep insight into events that supported the diversification and expansion of metazoan life during the Cambrian radiation 543 million years ago. Here, we p…

Leflunomide (HWA 486), a novel immunomodulating compound for the treatment of autoimmune disorders and reactions leading to transplantation rejection.

1991

Leflunomide has been shown to be very effective in preventing and curing several autoimmune animal diseases. Further, this agent is as effective as cyclosporin A in preventing the rejection of skin and kidney transplants in rats. Preliminary results from patients suffering from severe cases of rheumatoid arthritis demonstrated that clinical and immunological parameters could be improved with leflunomide therapy. Mode of action studies revealed that this substance antagonizes the proliferation inducing activity of several cytokines and is cytostatic for certain cell types. In this light, we could show that tyrosine phosphorylation of the RR-SRC peptide substrate and the autophosphorylation o…

Place de l’imagerie dans l’évaluation de l’efficacité des traitements dans le cancer du sein

2010

Resume Cette revue decrit le role de differentes methodes d’imagerie pour evaluer la reponse au traitement dans le cancer du sein. Deux situations sont envisageables : celle de la chimiotherapie neoadjuvante du cancer du sein et celle des metastases. Beaucoup de donnees cliniques sont disponibles pour trois criteres : le volume de la tumeur, la captation du fluorodeoxyglucose mesuree en TEP et la perfusion de la tumeur evaluee soit par IRM dynamique, soit en TEP. La TEP au 2-18F fluoro-2-desoxy-D-glucose (FDG) permet la prediction de la reponse apres une ou deux cures de chimiotherapie. De nouvelles approches pourraient prochainement affiner le role de l’imagerie. Ainsi, la TEP a la thymidi…