Hospital Universitario Central Of Asturias
Hospital Universitario Central Of Asturias
Herrera E.,University of Oviedo |
Cuetos F.,University of Oviedo |
Ribacoba R.,Hospital Universitario Central Of Asturias
Neuropsychologia | Year: 2012
Introduction: Parkinson's disease (PD) is associated with dopamine depletion in the fronto-striatal network which affects some language aspects such as verb processing. Some experiments have demonstrated that dopamine deficiency plays a role in the normal functioning of the lexico-semantic system. As a result, the verbal fluency task could be a useful tool to assess the function of the semantic system, by examining both the number of words generated and the frequency of use of those words. Objective: The aim of this study was to find out how dopamine affects the performance of PD patients using a verbal fluency task, focussing on action-word fluency. Method: A group of 20 PD patients and 20 controls participated in the study. Participants were assessed with four different verbal fluency tasks: phonological, semantic (animal and supermarket words) and action fluency. PD patients were tested twice (on/off medication) and controls only once. Results: For the number of words, there were significant differences between PD patients on and off medication in the phonological and action fluency tasks. Compared to controls, PD off medication produced significantly fewer words in phonological, and actions. Regarding frequency, differences were found between PD patients off medication and controls for the action-word category. Discussion: Our data showed a specific deficit in PD patients off medication in categories mainly depending on frontal lobe function (phonological and actions) while these differences were restored with dopamine treatment. Moreover, PD patients off medication produced higher frequency verbs than controls, suggesting that dopamine affects the normal functioning within the lexico-semantic network of verbs. © 2012 Elsevier Ltd.
Vidal-Castineira Jr.,Hospital Universitario Central Of Asturias
Oncotarget | Year: 2017
Acute myeloid leukemia (AML) is a disease with great morphological and genetic heterogeneity, which complicates its prognosis and treatment. The hypomethylating agents azacitidine (Vidaza®, AZA) and decitabine (Dacogen®, DAC) have been approved for the treatment of AML patients, but their mechanisms of action are poorly understood. Natural killer (NK) cells play an important role in the recognition of AML blasts through the interaction of the activating NKG2D receptor with its ligands (NKG2DL: MICA/B and ULBPs1-3). However, soluble NKG2DL (sNKG2DL) can be released from the cell surface, impairing immune recognition. Here, we examined whether hypomethylating agents modulate the release of sNKG2DL from AML cells. Results demonstrated that AZA- and DAC-treated AML cells reduce the release of sNKG2DL, preventing downregulation of NKG2D receptor on the cell surface and promoting immune recognition mediated by NKG2D-NKG2DL engagement. We show that the shedding of MICA, MICB and ULBP2 is inhibited by the increased expression of TIMP3, an ADAM17 inhibitor, after DAC treatment. The TIMP3 gene is highly methylated in AML cells lines and in AML patients (25.5%), in which it is significantly associated with an adverse cytogenetic prognosis of the disease. Overall, TIMP3 could be a target of the demethylating treatments in AML patients, leading to a decrease in MICA, MICB and ULBP2 shedding and the enhancement of the lytic activity of NK cells through the immune recognition mediated by the NKG2D receptor. © Raneros et al.
Pascual J.,Hospital Universitario Central Of Asturias
Revista de neurologia | Year: 2012
We define chronic migraine as that clinical situation in which migraine attacks appear 15 or more days per month. Until recently, and in spite of its negative impact, patients with chronic migraine were excluded of the clinical trials. This manuscript revises the current treatment of chronic migraine. The first step should include the avoidance of potential precipitating/aggravating factors for chronic migraine, mainly analgesic overuse and the treatment of comorbid disorders, such as anxiety and depression. The symptomatic treatment should be based on the use of nonsteroidal anti-inflammatory agents and triptans (in this case < 10 days per month). It is necessary to avoid the use of combined analgesics, opioids and ergotamine-containing medications. Preventive treatment includes a 'transitional' treatment with nonsteroidal anti-inflammatory agents or steroids, while preventive treatment exerts its actions. Even though those medications efficacious in episodic migraine prevention are used, the only drugs with demonstrated efficacy in the preventive treatment of chronic migraine are topiramate and pericranial infiltrations of Onabotulinumtoxin A.
Martinez-Borra J.,Hospital Universitario Central Of Asturias |
Lopez-Larrea C.,Hospital Universitario Central Of Asturias
Advances in Experimental Medicine and Biology | Year: 2012
Autophagy is a highly conserved mechanism which is essential for the maintenance of cellular homeostasis in response to cellular stress. Autophagy has been conserved from yeast to humans as a quality control process that is involved in the recognition and turnover of damaged proteins and organelles. It is also a response mechanism to nutrient starvation. In mammals, autophagy is involved in antigen presentation, tolerance, inflammation and protection against neurodegenerative diseases. The decrease of autophagy during aging reduces the removal of damaged organelles and increases the accumulation of waste products in the cells. In this chapter, we review these aspects of autophagy along with their role in self-nonself distinction, their implication in innate and adaptive immune response, and its dysregulation in the pathology of certain inflammatory and autoimmune diseases. © 2012 Landes Bioscience and Springer Science+Business Media.
Suarez-Alvarez B.,Hospital Universitario Central Of Asturias |
Rodriguez R.M.,University of Oviedo |
Fraga M.F.,University of Oviedo |
Lopez-Larrea C.,Hospital Universitario Central Of Asturias
Trends in Genetics | Year: 2012
During hematopoiesis, a unique hematopoietic stem cell (HSC) from the bone marrow gives rise to a subset of mature blood cells that directs all the immune responses. Recent studies have shown that this well-defined, hierarchical process is regulated in part by epigenetic mechanisms. Changes in the DNA methylation profile have a critical role in the division of these stem cells into the myeloid and lymphoid lineages and in the establishment of a specific phenotype and functionality in each terminally differentiated cell type. In this review, we describe how the DNA methylation patterns are modified during hematopoietic differentiation and what their role is in cell plasticity and immune function. An in-depth knowledge of these epigenetic mechanisms will help clarify how cell type-specific gene programs are established, and how they can be leveraged in the development of novel strategies for treating immune system-related pathologies. © 2012 Elsevier Ltd.
Delgado E.,Hospital Universitario Central Of Asturias
International Journal of Clinical Practice | Year: 2012
Aim: We evaluated the effectiveness of insulin glargine (glargine)-based regimens in patients with type 2 diabetes mellitus (T2DM) in clinical practice in Spain. Methods: This was a retrospective, registry-based study of 1482 patients treated with neutral protamine Hagedorn (NPH) who were either switched to glargine or maintained on NPH at investigators' discretion. The primary outcomes were HbA 1c change over a period of 4-9 months follow-up and incidence of hypoglycaemia. Results: Prior to switching treatment, mean ± standard deviation HbA 1c was worse in the glargine vs. the NPH group (8.3 ± 1.2% vs. 7.9 ± 1.1% respectively; p < 0.0001). After 4-9 months of treatment, mean reductions in HbA 1c were greater with glargine vs. NPH (-1.0 ± 1.0% vs. -0.2 ± 0.8% respectively; p < 0.0001) and the incidence of hypoglycaemia in the month prior to the study visit was lower (21.8% vs. 47.6% respectively; p < 0.0001). An expected reduction in dosing frequency, as well as in the basal insulin dose was reported for glargine vs. NPH, with 97.3% of glargine-treated patients on once-daily injections and 81.2% on NPH receiving twice-daily therapy. Improvements in treatment satisfaction were significantly higher with glargine (p < 0.0001). Conclusions: In a Spanish clinical practice setting, patients with T2DM who switched to glargine from NPH experienced significantly greater reductions in mean HbA 1c and a lower incidence of hypoglycaemia than patients maintained on NPH. © 2012 Blackwell Publishing Ltd.
Rodriguez-Rodero S.,Hospital Universitario Central Of Asturias
Discovery medicine | Year: 2010
Aging is one of the most challenging and unresolved problems in biology owing to its highly complex nature. Public interest in aging has increased not only because all of us can expect to live to a ripe old age but also because we wish to avoid those age-related changes that lead to physical invalidity or other diseases (cancer, depression) and may ultimately cause social isolation. Aging is a process of genetic and epigenetic interactions at all biological levels, where epigenetics has an important function in determining the phenotypic differences that arise. Epigenetics also plays a key role in the development of diseases associated with aging and explains the relationship between an individual's genetic background, the environment, aging, and disease. DNA plasticity is mediated in part by the epigenetic changes that lead the role of a cell, and can be passed on to future generations. Epigenetics establishes the idea that our health can be affected not only by the interplay of our genes and environment but also by the inherited effects of our ancestors' genes and environment.
Tuca A.,University of Barcelona |
Jimenez-Fonseca P.,Hospital Universitario Central Of Asturias |
Gascon P.,University of Barcelona
Critical Reviews in Oncology/Hematology | Year: 2013
Cancer anorexia-cachexia syndrome (CACS) is a complex metabolic syndrome, different from malnutrition and sarcopenia, which is very common in cancer patients. Treatment for CACS is based on nutritional support and CACS pathophysiology-modulating drugs. The most commonly used are megestrol acetate (MA) and corticosteroids. The efficacy of MA has been confirmed by multiple clinical trials and meta-analyses. Glucocorticoids are also effective but should only be used for short periods and in selected cases. Future strategies should include intensified research into potentially effective drugs (ω-3 fatty acids, thalidomide, cannabinoids, ghrelin, bortezomib, and COX-2 inhibitors), combined treatment and new drugs (anti-IL-6 monoclonal antibodies, melanocortin, β-2 antagonists, and androgen receptor-modulating analogues). We propose a review based on the literature on the pathophysiology of CACS, the diagnostic criteria and treatment, and future strategies. © 2013 Elsevier Ireland Ltd.
Paz Aparicio J.,Hospital Universitario Central Of Asturias
European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society | Year: 2011
To determine whether polymorphisms (SNPs) in the genes encoding cytokines and nitric oxide synthase (NOS) might play some role in lumbar disc herniation (LDH). Case-control study in which 179 patients were retrospectively reviewed. The case group was made of 50 patients with symptomatic LDH diagnosed by MRI while the control group was made of 129 individuals undergoing routine hip or knee arthroplasty with a lifetime lack of low back pain. SNPs in the cytokine genes of IL-1 [IL-1α (-889 C/T), IL-1β (+3953 T/C)], TNF-α (-308 G/A and -238 G/A) and NOS genes [eNOS (r 27 bp, intron 4 and -786 T/C) and iNOS (22 G/A)]. The CC genotype and C allele of the IL-1β (+3953 T/C) SNP were significantly more frequent among LDH patients compared to controls. On the other hand, eNOS (-768 T/C) and iNOS (22 G/A) SNPs were significantly more common in the control group. Carriers of the CC genotype of the IL-1β (+3953 T/C) SNP were more frequent among LDH patients suggesting some potential role of the IL-1β SNP on LDH pathogenesis. The eNOS (-786 T/C) and iNOS (22 G/A) SNPs were more frequent among the control subjects, suggesting their possible protective role against LDH. Genotyping these SNPs could be useful to identify persons with an increased lifetime risk of disc herniation in whom measures to avoid LDH could be implemented.
Lopez F.,Hospital Universitario Central Of Asturias
European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery | Year: 2013
Novel markers to accurately predict the risk of malignant transformation in laryngeal epithelial precursor lesions (EPL) are needed. We tried to identify some molecular alterations occurring in laryngeal tumorigenesis. In this study, 60 paraffin-embedded EPL and 17 metachronous invasive carcinomas were immunostained for markers associated with proliferation (Ki67), cell cycle control (p53, p21, p16, p27, cyclin D1), and cell adhesion and invasion (laminin and β-catenin). Aberrant expression of p16 and p53 and positivity at cytoplasm for β-catenin and cyclin D1 were detected significantly in EPL with progression to invasive laryngeal carcinoma. All cases with basal and suprabasal reactivity of p53 showed β-catenin overexpression. We found that β-catenin protein expression increased significantly with the grade of dysplasia. This is one of the studies with the largest number of laryngeal EPL and invasive carcinoma studied sequentially. Our data confirm the role of some cell cycle regulatory proteins in the development of laryngeal carcinoma. Cytoplasmic retention of β-catenin in EPL seems to be related with more aggressive biological behavior. Combined increased p53 and cytoplasmic β-catenin protein expression could be biologically important in laryngeal tumorigenesis. Further research is required to clarify the involvement of β-catenin in the mechanism associated with malignant transformation in laryngeal tissues.