Articles by Ana Isabel Pinheiro Gomes
Presymptomatic Testing (PST) for Huntington’s disease (HD) is available since 1986 and its impact... more Presymptomatic Testing (PST) for Huntington’s disease (HD) is available since 1986 and its impact on carriers and non-carriers is not yet fully clear. It is important to understand its psychological impact so that the PST protocols are best suited to the subjects at-risk. Preventing a negative psychological impact is the ultimate purpose of the genetic counselling process. This study addresses the long-term negative psychological impact assessment of PST for HD. The sample consisted of 29 subjects that were 50% at-risk for HD, and had performed the PST for at least three years ago. Participants answered the sociodemographic questionnaire and the Brief Symptom Inventory, the Zung Self-Rating Anxiety Scale, and the Beck Depression Inventory. Although most of the sample does not present clinically significant psychopathology values, 6 subjects present a Positive Symptoms Distress Index value which is equal to or greater than 1.7; 7 subjects present a value which is equal to or greater than 40 of anxiety; and 7 subjects present mild depression. Symptomatic carriers, who underwent the PST less time ago, present worse psychopathological symptoms, depression and anxiety. Subjects with this profile should have a more intense and personalized psychological and social support, aiming to prevent the risk of suicide and to improve the quality of their lives.
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Papers by Ana Isabel Pinheiro Gomes
Molecular Cancer Research, 2012
E2F1 is responsible for the regulation of FOXM1 expression, which plays a key role in epirubicin ... more E2F1 is responsible for the regulation of FOXM1 expression, which plays a key role in epirubicin resistance. Here, we examined the role and regulation of E2F1 in response to epirubicin in cancer cells. We first showed that E2F1 plays a key role in promoting FOXM1 expression, cell survival, and epirubicin resistance as its depletion by siRNA attenuated FOXM1 induction and cell viability in response to epirubicin. We also found that the p38–MAPK activity mirrors the expression patterns of E2F1 and FOXM1 in both epirubicin-sensitive and -resistant MCF-7 breast cancer cells, suggesting that p38 has a role in regulating E2F1 expression and epirubicin resistance. Consistently, studies using pharmacologic inhibitors, siRNA knockdown, and knockout mouse embryonic fibroblasts (MEF) revealed that p38 mediates the E2F1 induction by epirubicin and that the induction of E2F1 by p38 is, in turn, mediated through its downstream kinase MK2 [mitogen-activated protein kinase (MAPK)-activated protein ...
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Food Chemistry, 2012
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Clínica y Salud, Jun 3, 2019
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Clínica y Salud
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Antimicrobial agents and chemotherapy, Jan 10, 2018
The impact of pneumonia (PcP) on morbidity and mortality remains substantial for immunocompromise... more The impact of pneumonia (PcP) on morbidity and mortality remains substantial for immunocompromised individuals, including those afflicted by HIV infection, organ transplantation, cancer, auto-immune diseases, or subject to chemotherapy or corticosteroid-based therapies. Previous work from our group has shown that repurposing antimalarial compounds for PcP holds promise for treatment of this opportunistic infection. Following our previous discovery of chloroquine analogues with dual-stage antimalarial action both and , we now report the potent action of these compounds on Identification of chloroquine analogues as anti-PcP leads is an unprecedented finding.
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Journal of Analytical Methods in Chemistry, 2016
The lipid fraction of milk is one of the most complex matrixes in foodstuffs due to the presence ... more The lipid fraction of milk is one of the most complex matrixes in foodstuffs due to the presence of a high number of moieties with different physical and chemical properties. Glycerolipids include glycerol and two fatty acids esterified in positions sn-1 and sn-2 with higher concentration of unsaturated fatty acids than in the triglyceride fraction of milk. Sphingolipids consist of a sphingoid base linked to a fatty acid across an amide bond. Their amphiphilic nature makes them suitable to be added into a variety of foods and recent investigations show that phospholipids, mainly phosphatidylserine and sphingomyelin, can exert antimicrobial, antiviral, and anticancer activities as well as positive effects in Alzheimer's disease, stress, and memory decline. Polar lipids can be found as natural constituents in the membranes of all living organisms with soybean and eggs as the principal industrial sources, yet they have low contents in phosphatidylserine and sphingomyelin. Animal products are rich sources of these compounds but since there are legal restrictions to avoid transmission of prions, milk and dairy products are gaining interest as alternative sources. This review summarizes the analysis of polar lipids in dairy products including sample preparation (extraction and fractionation/isolation) and analysis by GC or HPLC and the latest research works using ELSD, CAD, and MS detectors.
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Acta Medica Portuguesa, 2007
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Journal of Agricultural and Food Chemistry, 2015
The banned pesticide dichlorodiphenyltrichloroethane (DDT) and its main metabolite, p,p&a... more The banned pesticide dichlorodiphenyltrichloroethane (DDT) and its main metabolite, p,p'-dichlorodiphenyldichloroethylene (DDE), are commonly found in the food chain and in all tissues of living organisms. DDE is associated with metabolic diseases acting as an endocrine disruptor and more recently with the obesity pandemic. This study focuses on using fatty acid analysis to relate DDE exposure and metabolic dysfunction: liver and adipose tissue (visceral and subcutaneous) composition from male Wistar rats fed a standard (STD) or high-fat (HF) diet versus the addition of DDE in water. DDE exposure increased liver levels of palmitic, stearic, oleic, trans fatty, and linoleic acids having altered the n6 and n3 pathways leading to high concentrations of arachidonic acid and DHA (C22:6 n3). The results of this study confirm the close relationship between this pesticide metabolite and hepatic lipid dysfunction, underscoring its role as an emerging target for the prevention and therapy of nonalcoholic fatty liver disease (NAFLD).
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Aging, 2010
Cardiac failure is a leading cause of age-related death, though its root cause remains unknown. M... more Cardiac failure is a leading cause of age-related death, though its root cause remains unknown. Mounting evidence implicates a decline in mitochondrial function due to increased opening of the mitochondrial permeability transition pore (mPTP). Here we report that the NAD+-dependent deacetylase SIRT3 deacetylates the regulatory component of the mPTP, cyclophilin D (CypD) on lysine 166, adjacent to the binding site of cyclosporine A, a CypD inhibitor. Cardiac myocytes from mice lacking SIRT3 exhibit an age-dependent increase in mitochondrial swelling due to increased mPTP opening, a phenotype that is rescued by cyclosporine A. SIRT3 knockout mice show accelerated signs of aging in the heart including cardiac hypertrophy and fibrosis at 13 months of age. SIRT3 knockout mice are also hypersensitive to heart stress induced by transverse aortic constriction (TAC), as evidenced by cardiac hypertrophy, fibrosis, and increased mortality. Together, these data show for the first time that SIRT...
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RSC Adv., 2015
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Aging Cell, 2014
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Scientific Reports, 2011
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Scientific Reports, 2013
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Methods in molecular biology (Clifton, N.J.), 2015
Metabolic flexibility is vital for the cells to adapt to different energetic situations, allowing... more Metabolic flexibility is vital for the cells to adapt to different energetic situations, allowing the organisms to adapt to changing conditions and survive challenges. One of the most important regulators of the metabolic flexibility is PGC-1α activity. PGC-1α integrates numerous signals and regulates a variety of transcription factors and nuclear receptors that together regulate mitochondrial homeostasis and fatty acid oxidation. One of the major ways that PGC-1α activity is regulated is by changes in its acetylation status. Thus measuring the acetylation status of PGC-1α is an important indicator of the metabolic flexibility of the cells. In this chapter, we describe an approach to evaluate PGC-1α acetylation in primary mouse myotubes. The method is applicable to other cell types and tissues as well.
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Universal Access in the Information Society, 2009
... making use of, in the most critical parts of the code, a lower level implementation in order ... more ... making use of, in the most critical parts of the code, a lower level implementation in order to ... Another user has cerebral paralysis and his horizontal head movements are very limited. ... He tested Magic Key as a potential system for the future since his finger movements tend to be ...
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Synlett, 2012
ABSTRACT
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Science, 2013
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Nature Communications, 2013
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Articles by Ana Isabel Pinheiro Gomes
Papers by Ana Isabel Pinheiro Gomes