Publications by authors named "Joao Barbosa-Martins"

Background: Induction chemotherapy has been described as an option in locally advanced oral cavity squamous cell carcinoma when the surgical morbidity is expected to be high. This work aimed to evaluate the outcome and safety of induction chemotherapy in this setting.

Methods: We performed a retrospective and observational study including patients with oral cavity squamous cell carcinoma, treated with induction chemotherapy between January 2010 and December 2018.

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Background: A pneumonic infiltrate might hide an occult lung cancer (LC). This awareness depends on each clinician personal experience, turning definitive LC diagnosis challenging and possibly delayed. In this study we aimed to develop a clinical score to better identify those cases.

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Gastric cancer (GC) is a worldwide health condition of major concern, with gastric carcinoma with signet ring cell features being increasingly reported. A 61-year-old woman was admitted to the Emergency department with back pain, gastrointestinal complaints, and weight loss. A lumbar and hip computed tomography (CT) was performed and revealed multiple suspicious secondary bone lesions.

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Unlabelled: Arterial thrombosis and Budd-Chiari syndrome are rare conditions in lung cancer patients. We report the case of a 53-year-old woman who presented with respiratory symptoms, lumbar pain, weight and appetite loss, and an x-ray showing a lung nodule and diffuse micro-opacities. She was diagnosed with lung neoplasia with extensive lung, liver, lymph node and bone metastases.

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Introduction: Clostridium difficile infection has been increasingly reported, with a significant healthcare burden and important morbimortality. This study aimed to characterize and describe the severity and outcomes of this event at a Portuguese hospital.

Material And Methods: We conducted a retrospective analysis, by clinical record review, of all confirmed cases diagnosed in a hospital in the North of Portugal, between January 2013 and December 2018.

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Benign prostate hyperplasia is a dysfunctional disease with an elevated prevalence. Despite the accepted impact of aging and testosterone (TES) in its pathophysiology, its aetiology remains unknown. Recent studies described that serotonin (5-HT) inhibits benign prostate growth through the modulation of the androgen receptor, in the presence of TES.

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MicroRNAs (miRNAs) are small, non-coding RNAs that mediate post-transcriptional gene silencing, fine tuning gene expression. In an initial screen, miRNAs were found to be globally down-regulated in prostate cancer (PCa) cell lines and primary tumours. Exposure of PCa cell lines to a demethylating agent, 5-Aza-CdR resulted in an increase in the expression levels of miRNAs in general.

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Paraquat (PQ), a cationic nonselective bipyridyl herbicide, has been used as neurotoxicant to modulate Parkinson's disease in laboratory settings. Other compounds like rotenone (ROT), a pesticide, and 1-methyl-4-phenylpyridinium ion (MPP(+)) have been widely used as neurotoxicants. We compared the toxicity of these three neurotoxicants using differentiated dopaminergic SH-SY5Y human cells, aiming to elucidate their differential effects.

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