Publications by authors named "Rui Miguel Gil DA Costa"

Background And Aim: Papillomaviruses (PVs) infections have been documented in numerous animal species across different regions worldwide. They often exert significant impacts on animal health and livestock production. Scientists have studied natural products for over half a century due to their diverse chemical composition, acknowledging their value in fighting cancer.

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High-risk human papillomavirus (HPV) infection is associated with cervical cancer while low-risk HPV strains mostly cause benign lesions. Multiple studies have also associated HPV with coronary artery (CAD) disease in women. Furthermore, the climacteric period in women, triggers chronic inflammation and has major implications for CAD and associated lipid disorders.

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Background/aim: Head-and-neck squamous cell carcinoma (HNSCC) is the fifth most common cancer in the world and human papillomavirus (HPV) is an important risk factor for this neoplasm. Recent studies showed an association between sex hormone receptors and pathogenesis and/or prognosis in patients with HNSCC. The aim of this study was to clarify the expression patterns of sex hormone receptors in HPV-positive and HPV-negative HNSCC and their associations with tumour biopathology and biological behaviour.

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Article Synopsis
  • This study investigates the antitumoral properties of a fungal extract sourced from a polluted lagoon in Northeastern Brazil.
  • The Ethyl Acetate Extracellular Extract (EAE) was tested on solid Ehrlich tumors in mice, showing significant tumor size reduction across various dosages (4, 20, and 100 mg/kg) while ensuring no harmful side effects.
  • The findings reveal that the extract is rich in meroterpenoids, supports immunomodulation, and suggests that fungal fermentation could be an effective method for developing new antitumor therapies.
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Objective: Climacterium is associated with elevated leptin levels and increased risk of cardiovascular disorders. Conflicting data diverge on whether high leptin levels in climacterium reflect increasing adipose mass or, at least partially, age-related hormonal changes. This study addresses this issue in women from a Brazilian state with a low human development index.

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The production of chestnut ( Miller) is mostly concentrated in Europe. Chestnut is recognized by its high content of antioxidants and phytosterols. This work aimed to evaluate the effects of dietary chestnut consumption over physiological variables of FVB/n mice.

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Lipopolysaccharide (LPS) induces fever through cytokines like receptor-activator of nuclear factor κB ligand (RANKL), triggering mediators like prostaglandins (PG), endothelin-1 (ET-1), corticotrophin-releasing factor (CRF), substance P (SP) and endogenous opioids. LPS-induced fever is reduced in females compared with males except in ovariectomized (OVX) females which show increased fever mediated by PG. The present study aimed to identify the mediators involved in fever in intact and OVX female rats.

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Carcinogenesis induced by high-risk human papillomavirus (HPV) involves inflammatory phenomena, partially mediated by cyclooxigenase-2. In pre-clinical models of HPV-induced cancer, cyclooxygenase-2 inhibitors have shown significant efficacy, but also considerable toxicity. This study addresses the chemopreventive effect and hepatic toxicity of a specific cyclooxigensase-2 inhibitor, parecoxib, in HPV16-transgenic mice.

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Article Synopsis
  • Cardiovascular diseases are major global health issues, and recent research suggests that certain viruses, like HPV, may contribute to the risk of developing coronary artery disease (CAD), especially in women.
  • A study involving 52 climacteric women found that a significant number of those with CAD tested positive for HPV, indicating a strong link between HPV infection and CAD risk.
  • The findings suggest that HPV-positive women have a higher likelihood of having CAD, particularly with high-risk HPV types, but further research is necessary to explore the underlying mechanisms of this association.
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