174 research outputs found
Preliminary design study of a baseline MIUS
Results of a conceptual design study to establish a baseline design for a modular integrated utility system (MIUS) are presented. The system concept developed a basis for evaluating possible projects to demonstrate an MIUS. For the baseline study, climate conditions for the Washington, D.C., area were used. The baseline design is for a high density apartment complex of 496 dwelling units with a planned full occupancy of approximately 1200 residents. Environmental considerations and regulations for the MIUS installation are discussed. Detailed cost data for the baseline MIUS are given together with those for design and operating variations under climate conditions typified by Las Vegas, Nevada, Houston, Texas, and Minneapolis, Minnesota. In addition, results of an investigation of size variation effects, for 300 and 1000 unit apartment complexes, are presented. Only conceptual aspects of the design are discussed. Results regarding energy savings and costs are intended only as trend information and for use in relative comparisons. Alternate heating, ventilation, and air conditioning concepts are considered in the appendix
p63 expression in normal skin and usual cutaneous carcinomas
Background: p63 is a p53 homologue that is mapped to chromosome 3q27. This gene encodes six different isoforms, which have either transactivating or dominant negative effects on p53-reporter genes. It has been described that in contrast to p53, p63 seems not to be associated with tumor predisposition, as neither p63 knockout mouse models nor germline p63 mutations are related to an increased risk of tumorigenesis. It has been demonstrated that p63 is a reliable keratinocyte stem cell marker and that it is involved in the maintenance of the stem cell population. Scant data on p63 expression in normal skin, basal cell carcinomas (BCCs), keratoacanthomas and squamous cell carcinomas (SCCs) have been reported. We herein evaluated p63 expression in 16 BCCs, one keratoacanthoma and 13 SCCs.
Methods: Immunohistochemistry according to the streptavidinbiotin-peroxidase technique, using the antibody 4A4 raised against all
p63 isoforms, was performed. p63 expression was evaluated in
epidermal cells and skin appendages. Semi-quantitative evaluation
(–, π, ππ, πππ) of p63 expression in BCCs, keratoacanthoma and
SCCs was carried out. Only nuclear expression was considered as
specific.
Results: p63 was expressed in the nuclei of epidermal basal and
suprabasal cells, in the cells of the germinative hair matrix and the
external root sheath of hair follicles, in the basal cells of the sebaceous
gland and in the myoepithelial/basal cells of the sweat glands. All
terminally differentiated cells were negative for p63. All BCCs showed
ππto πππ immunoreactivity. At variance, keratoacanthomas and
grade I and II SCCs showed variable p63 reactivity in a basal layerlike
distribution, whereas undifferentiated cells of grade III SCCs
showed ππto πππ positivity. A grade IV spindle SCC showed π
immunoreactivity. The SCCs in situ showed remarkable expression of
p63 in all cell layers. Terminally differentiated squamous cells were
either negative or showed only focal immunoreactivity in the
carcinomas.
Conclusions: p63 is consistently expressed in the basal cells of
epidermis and cutaneous appendages, including the basal/
myoepithelial cells of sweat glands. Based on our findings, the balance
of probabilities favors that p63 might play a role in the pattern of
differentiation and in the oncogenesis of usual carcinomas of the skin.Fundação para a Ciência e a Tecnologia (FCT) - SFRH/BD/5386/2001.
Fundação para a Ciência e a Tecnologia (FCT) – Programa Operacional “Ciência, Tecnologia, Inovação” (POCTI)
The contribution of 7q33 copy number variations for intellectual disability
Copy number variations (CNVs) at the 7q33 cytoband are very rarely described in the literature, and almost all of the cases comprise large deletions affecting more than just the q33 segment. We report seven patients (two families with two siblings and their affected mother and one unrelated patient) with neurodevelopmental delay associated with CNVs in 7q33 alone. All the patients presented mild to moderate intellectual disability (ID), dysmorphic features, and a behavioral phenotype characterized by aggressiveness and disinhibition. One family presents a small duplication in cis affecting CALD1 and AGBL3 genes, while the other four patients carry two larger deletions encompassing EXOC4, CALD1, AGBL3, and CNOT4. This work helps to refine the phenotype and narrow the minimal critical region involved in 7q33 CNVs. Comparison with similar cases and functional studies should help us clarify the relevance of the deleted genes for ID and behavioral alterations.FEDER funds, through the Competitiveness Factors Operational Programme (COMPETE), and by National funds, through the Foundation for Science and Technology (FCT), under the scope of the projects PIC/IC/83026/2007, PIC/IC/83013/2007, and POCI-01-0145-FEDER-007038. This work has also been funded by the project NORTE-01-0145-FEDER-000013, supported by the Northern Portugal Regional Operational Programme (NORTE 2020), under the Portugal 2020 Partnership Agreement, through the European Regional Development Fund (FEDER)info:eu-repo/semantics/publishedVersio
The Combined Influence of Oral Contraceptives and Human Papillomavirus Virus on Cutaneous Squamous Cell Carcinoma
The vast majority of cutaneous squamous cell carcinoma (CSCC) will occur in those with fair complexion, tendency to burn, and high ultraviolet radiation (UVR) exposure. Organ transplant recipients also are an important population at great risk for CSCC. An association has been reported between oral contraceptive (OC) use, human papillomavirus virus (HPV) and cervical cancer, and there could be a similar association for CSCC. The cutaneous HPV β-E6 protein, a close cousin of the transformative E6 protein underlying anogenital cancers, has been shown to inhibit apoptosis in response to UVR damage and stimulate morphologic transformation in rodent fibroblast cell lines. Furthermore, OC use has been shown to enhance HPV transcription and may contribute to CSCC risk through this pathway
Potential use of fatty acid profiles of the adductor muscle of cockles (Cerastoderma edule) for traceability of collection site
Geographic traceability of seafood is key for controlling its quality and safeguarding consumers’
interest. The present study assessed if the fatty acid (FA) profile of the adductor muscle (AM) of
fresh cockles (Cerastoderma edule) can be used to discriminate the origin of specimens collected in
different bivalve capture/production areas legally defined within a coastal lagoon. Results suggest
that this biochemical approach holds the potential to trace sampling locations with a spatial
resolution <10 Km, even for areas with identical classification for bivalve production. Cockles further
away from the inlet, i.e. in areas exposed to a higher saline variation, exhibited lower levels of
saturated fatty acids, which are key for stabilizing the bilayer structure of cell membranes, and a
higher percentage of polyunsaturated fatty acids, which enhance bilayer fluidity. Results suggest that
the structural nature of the lipids present in the AM provides a stable fatty acid signature and holds
potential for tracing the origin of bivalves to their capture/production areas
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