Search results for "GASTROINTESTINAL"

Manifestazioni orali in corso di patologie gastrointestinali

2013

Peptide-metal complexes: obtention and role in increasing bioavailability and decreasing the pro-oxidant effect of minerals.

2020

Bioactive peptides derived from food protein sources have been widely studied in the last years, and scientific researchers have been proving their role in human health, beyond their nutritional value. Several bioactivities have been attributed to these peptides, such as immunomodulatory, antimicrobial, antioxidant, antihypertensive, and opioid. Among them, metal-binding capacity has gained prominence. Mineral chelating peptides have shown potential to be applied in food products so as to decrease mineral deficiencies since peptide-metal complexes could enhance their bioavailability. Furthermore, many studies have been investigating their potential to decrease the Fe pro-oxidant effect by f…

Special issue on “Oxidative stress and redox signaling in the gastrointestinal tract and related organs”

2013

Static Digestion Models: General Introduction

2015

Several in vitro methods have been developed to simulate the physiological conditions of the human gastrointestinal digestion, the simplest being the static methods. The following chapter clarifies the concepts of bioaccessibility and dialyzability, and describes the conditions (pH, enzymes, agitation, etc.) to be applied in oral, gastric and intestinal phases when assessing a food component (nutrient, bioactive or toxin) or a food product, in a single or multi-phase model. The advantages and disadvantages of the static models vs. dynamic and in vivo models are discussed, and a review of specific conditions applied on nutrients (minerals, vitamins, proteins, fatty acids, etc.) and bioactive…

Uptake and retention of calcium, iron, and zinc from raw legumes and the effect of cooking on lentils in Caco-2 cells

2006

Abstract This study examined calcium, iron, and zinc uptake in Caco-2 cells (retention plus transport) from white beans, chickpeas, and lentils subjected to prior in vitro gastrointestinal digestion and the effect of cooking (traditional and industrial—ready to eat) on the uptake of these minerals from lentils. The highest cell uptake of calcium, iron, and zinc corresponded to raw chickpeas, which had the lowest soluble oxalate content and intermediate phenolic and tannin contents. From these results, raw chickpeas would be the best dietary source of calcium, iron, and zinc, although consumption in this form (ie, raw) is low. Cooking affects the calcium, iron, and zinc contents of lentils a…

Common antigenic determinant on ductular cells of normal pancreas, on mucosal cells of the gastrointestinal tract and on CEA

1990

CEA is widely used as a human tumour marker and was first defined by Gold and Freedman in 1965 as an antigenic component in cancers derived from gastrointestinal tract epithelium. It is a member of a large family of immunologically related glycoproteins that vary in size and tissue distribution. Studies with c-DNA clones for CEA and NCA reveal that this family consist only of a limited number of different proteins with variable glycosylation, due to post-transcriptional modifications. The complete gene family includes about 10 closely related genes. Recently it was published that in contrast to mRNA coding for CEA, mRNA coding for NCA was expressed predominantly in cancerous tissues. A mono…

Laika ietekme ārkārtas gastroendoskopijas veikšanā uz ārstēšanas iznākumu nevarikozas augšējas GI asiņošanas gadījumā

2018

Darba nosaukums: Laika ietekme ārkārtas gastroendoskopijas veikšanā uz ārstēšanas iznākumu nevarikozas augšējās GI asiņošanas gadījumā. Ievads: Akūta nevarikoza augšējā gastrointestinālā trakta asiņošana ir nopietna medicīniska patoloģija, kas var veicināt tālāku veselības pasliktināšanos un pat nāvi. Šī iemesla dēļ ir svarīgi analizēt agrīnas un vēlīnas ārkārtas endoskopijas ietekmi uz ārstēšanas iznākumu nevarikozas augšējās GI asiņošanas gadījumos. Darba mērķis: Mērķis ir izpētīt, vai agrīna endoskopisko izmeklējumu veikšana pacientam samazina negatīvu iznākumu riskus. Materiāli un metodes: Darbs ir veikts kā retrospektīvs kohortas pētījums. Dati tika ievākti no 2010. līdz 2017. gadam. P…

Systematic review: the presenting international normalised ratio (INR) as a predictor of outcome in patients with upper nonvariceal gastrointestinal …

2011

Aliment Pharmacol Ther 2011; 33: 1010–1018 Summary Background  The prognostic value of an elevated international normalised ratio (INR) as part of initial risk stratification in nonvariceal upper gastrointestinal bleeding (NVUGIB) remains poorly characterised. Aim  To assess the usefulness of the initial INR in patients with NVUGIB. Method  After a systematic review, we included the presenting INR and other validated prognosticators in multivariable models predicting rebleeding and mortality. Data are reported as odd ratios and 95% confidence intervals. Results  Only two of 769 candidate studies were useful, but reported disparate, highly selected NVUGIB patients with varying threshold init…

The glucagon-like Peptide-2

2011

Multiple peptide hormones produced within the gastrointestinal system act also in the central nervous system and aid in the regulation of energy homeostasis and metabolism. The list of these peptides is progressively increasing and includes glucagon-like peptide 2 (GLP-2) as an anorexigenic factor. GLP-2 is released from enteroendocrine L-cells following food intake and its principal target is represented by the gastrointestinal tract. GLP-2 has been shown to be an important intestinotrophic factor that stimulates epithelial cell proliferation and inhibits apoptosis. GLP-2 increases intestinal blood flow and the activity and expression of epithelial brush-border digestive enzymes and nutrie…

Glucagon-like peptide-1 relaxes gastric antrum through nitric oxide in mice.

2010

Abstract Glucagon-like-peptide-1 (GLP-1) is a proglucagon-derived peptide expressed in the intestinal enteroendocrine-L cells and released after meal ingestion. GLP-1 reduces postprandial glycemia not only by its hormonal effects, but also by its inhibitory effects on gastrointestinal motility. Recently, we showed that GLP-1 acts in the enteric nervous system of mouse intestine. Therefore our working hypothesis was that GLP-1 may have also a direct influence on the gastric mechanical activity since the major part of experimental studies about its involvement in the regulation of gastric motility have been conducted in in vivo conditions. The purposes of this study were (i) to examine exogen…