Search results for "45"

miR-20b and miR-451a Are Involved in Gastric Carcinogenesis through the PI3K/AKT/mTOR Signaling Pathway: Data from Gastric Cancer Patients, Cell Line…

2020

Gastric cancer (GC) is one of the most common and lethal gastrointestinal malignancies worldwide. Many studies have shown that development of GC and other malignancies is mainly driven by alterations of cellular signaling pathways. MicroRNAs (miRNAs) are small noncoding molecules that function as tumor-suppressors or oncogenes, playing an essential role in a variety of fundamental biological processes. In order to understand the functional relevance of miRNA dysregulation, studies analyzing their target genes are of major importance. Here, we chose to analyze two miRNAs, miR-20b and miR-451a, shown to be deregulated in many different malignancies, including GC. Deregulated expression of miR…

An experimental design for the controlled modulation of intracellular GSH levels in cultured hepatocytes

2006

This work proposes a practical experimental approach that allows the rapid in situ generation of a wide range of intracellular GSH concentrations in the intact hepatocyte under highly reproducible conditions. The strategy involves the use of diethyl maleate, a thiol-reactive electrophile that causes rapid and extensive GSH depletion, as well as GSH monoethylester, a GSH analogue that is readily taken up by cells and deesterified intracellularly to render GSH. For both agents, we have analyzed (i) the minimal exposure time required to produce a maximal and dose-related effect on intracellular GSH without altering hepatocyte viability or subsequent survival in culture, and (ii) the relative s…

Dynamics of the localization of drug metabolizing enzymes in tissues and cells.

1984

Human relationships in patients’ end-of-life: a qualitative study in a hospice ward

2019

Living in a hospice department is an intense experience for patients, caregivers, and healthcare professionals. End-of-life care aims to conduct vulnerable dying patients towards a painless and peaceful death. The importance of a strong staff-patient relationship and the perspective of pain and suffering from patients has already been studied. This study aimed to explore patients' inner needs living in hospice through a qualitative research approach. A descriptive qualitative study was conducted in the hospice department at ARNAS Civico in Palermo, Italy. From a qualitative research point of view, a significant sample of ten dying patients was interviewed. Data were collected until saturati…

Pain Prevalence in two Italian Hospitals. An observational study.

2022

Introduction: Pain is the most common and distressing medical symptom in hospitalized patients in all wards. Pain prevalence among hospitalized patients is an indicator of the quality of health care. Objective: The aim of this study is to describe pain prevalence in two Italian hospitals. Material and method: This is an observational study. It involved hospitalized patients of both sexes, able and unable to self-report. Descriptive analysis and multivariate analysis were applied. Results: A sample of 754 inpatients were included. In Terni Ho-spital (n = 255), pain prevalence was 80.8%. The mean pain severity was 5.2 (sd ± 3.33). At Rome's San Camillo Hospital (n=499), pain prevalence was 46…

Epidemiology of Chronic Pain in the Latium Region, Italy. a Cross-sectional Study on the Clinical Characteristics of Patients Attending Pain Clinics

2019

In Italy, chronic pain affects more than a quarter of the population, whereas the average European prevalence is 21%. This high prevalence might be due to the high percentage of Italian people who do not receive treatment, even after the passing of law 38/2010 (the right to access pain management in Italy), which created a regional network for the diagnosis and treatment of noncancer chronic pain. Italian epidemiologic studies on chronic pain are scanty, and this observational, multicenter, cross-sectional study is the first to investigate the clinical characteristics of patients who attended the pain management clinics in the Latium Region, Italy, for the management of their noncancer chro…

The inhibition by flavonoids of 2-amino-3-methylimidazo[4,5-f]quinoline metabolic activation to a mutagen: a structure-activity relationship study.

1997

The mutagenicity of 2-amino-3-methylimidazo[4,5-f]quinoline (IQ) in Salmonella typhimurium TA98 is inhibited by flavonoids with distinct structure-antimutagenicity relationships (Edenharder, R., I. von Petersdorff I. and R. Rauscher (1993). Antimutagenic effects of flavonoids, chalcones and structurally related compounds on the activity of 2-amino-3-methylimidazo[4,5-f]quinoline (IQ) and other heterocyclic amine mutagens from cooked food, Mutation Res., 287, 261-274). With respect to the mechanism(s) of antimutagenicity, the following results were obtained here. (1) 7-Methoxy- and 7-ethoxyresorufin-O-dealkylase activities in rat liver microsomes, linked to cytochrome P-450-dependent 1A1 and…

Differential Effects of Nonhydroxylated Flavonoids as Inducers of Cytochrome P450 1A and 2B Isozymes in Rat Liver

1996

Flavanone, flavone, and tangeretin differentially affected the activities of cytochrome P540 1A and 2B isozymes in rat liver. Flavone and, to a lesser extent, tangeretin, increased activities of ethoxyresorufin O-deethylase, methoxyresorufin O-demethylase, and pentoxyresorufin O-dealkylase (PROD), whereas flavanone mainly enhanced PROD activity. Immunoblot analysis indicated that flavone and tangeretin increased cytochrome P450 1A1, 1A2, and 2B1,2 forms, whereas flavanone only enhanced the cytochrome P450 2B isozymes. Northern blot study showed that flavone and tangeretin increased the level of the cytochrome P450 1A2 mRNAs. The concentration of the other mRNAs were slightly or not affected…

The Effects of Sulphydryl Reagents on the Binding and Mixed Function Oxidation of Hexobarbital in Rat Hepatic Microsomes

1975

1. The effects of the sulphydryl reagents p-chloromercuribenzoate, N-ethylmaleimide and iodoacetamide on the binding spectrum, oxygen consumption and formation of a suspected substrate-cytochrome P-450-oxygen complex for hexobarbital in rat liver microsomes were investigated. 2. The oxygen consumption caused by hexobarbital oxidation was inhibited non-competitively by all three agents, with 50% inhibition at 4 times 10(-5) M for p-chloromercuribenzoate, 3-7 times 10(-4) M for N-ethylmaleimide and 1-9 times 10(-3) M for iodoacetamide. Cysteamine protected and at least partially reversed this inhibition. 3. p-chloromercuribenzoate inhibited the formation of the cytochrome P-450-substrate-oxyg…

Distribution and induction of cytochrome P-450 and two cytochrome P-450-dependent monooxygenase activities in rat liver parenchymal cell subpopulatio…

1989

Liver parenchymal cells from the periportal and centrilobular zones differ in their morphological, biochemical and functional characteristics. In an effort to obtain fractions enriched in either periportal or centrilobular cells, isolated rat liver parenchymal cells were separated into five subpopulations by centrifugal elutriation. The mean diameters of the cells present in fractions I-V were 19.6, 21.1, 21.8, 22.7 and 23.5 micron, respectively. The content of cytochrome P-450 as well as benzphetamine N-demethylase and 7-ethoxyresorufin O-deethylase activities were higher in the larger parenchymal cells than in the smaller ones. After administration of phenobarbital the content of cytochro…