View clinical trials related to Hypersensitivity.
Filter by:The recent finding that early introduction of peanut can prevent ~70-90% of peanut allergy is a major step towards prevention of food allergy. However, because that finding was from a clinical trial in a very select population, there are several major questions that must be answered in order to implement these findings into clinical practice without causing more harm than good. These questions include who, if anyone, should be screened prior to early introduction for peanut allergy, how this screening should be done, and what quantity of peanut ingestion is needed to prevent peanut allergy. The goal of this project is to answer these critical questions so that the potential of these recent findings can be realized. To that end, 400 infants at high-risk of peanut allergy will be enrolled. These infants will be given a peanut skin prick test, peanut food challenge and have blood drawn for measurement of peanut IgE, and then will be followed for assessment of peanut consumption and development of peanut allergy until 3 years of age.
Introduction: The pain sensitivity associated with whitening is the main problem reported by patients during dental whitening, and the use of desensitizing dentifrices is an alternative for the treatment of sensitivity. Objective: To evaluate clinically the influence of desensitizing dentifrices applied through a plastic tray, reducing the pain sensitivity and color variation caused by the technique of in-office dental whitening, through a controlled double-blind clinical study. Methods: A longitudinal prospective study was conducted with 48 individuals, 18 years and 30 years of age, without gender distinction, who underwent in-office dental whitening using 35% hydrogen peroxide (Whiteness HP, FGM, Joinville , SC, Brazil) in three clinical sessions with a one-week interval between them. The volunteers used in the night for each bleaching session a plastic tray for 4 hours containing one of the dentifrices related to the experimental groups: Group 1 (Control) - Sucralose (S) (Biotype - Manipulation pharmacy); Group 2 (Active control) - Sodium fluoride (FS) with 1450ppm of fluorine (Close up triple, Unilever); Group 3 - Arginine, calcium carbonate (ACC) and sodium monofluorophosphate with 1450 ppm fluorine (Colgate sensitive pro-relief, Colgate-Palmolive); Group 4 - 5% potassium nitrate (NP) and sodium fluoride with 1450 ppm fluorine (Sensodyne pro-enamel, GlaxoSmithKline). The evaluation of the sensitivity associated with the times of use of the plastic tray in the first session (S1: sensitivity before the tray, S2: sensitivity after the tray), in the second session (S3: sensitivity before the tray, S4: in the third session (S5: sensitivity before the tray, S6: sensitivity after the tray) used the analog numerical scale with scores from 0 to 10 and for the color evaluation the spectrophotometer (Easyshade, Vident, Brea, CA, Obtaining the data that were used in the CIELab system. The data were submitted to the multivariate analysis of variance (MANOVA) with repeated measurements and Lambda Wilks test with a 5% probability level to differentiate the groups. In addition, the factorial variance analysis (ANOVA) in one criterion was applied. Values of p <0.05 were considered statistically significant.
Esophageal hypersensitivity is considered an important pathophysiological mechanism in patients suffering form non-erosive gastro-esophageal reflux disease. Serotonin (5-HT) is predominantly found in the central nervous system and in the gastro-intestinal (GI) tract. 5-HT plays a major role in the regulation of GI secretion, motility and sensitivity, and has been associated with emotion regulation. Acute tryptophan depletion (ATD) temporarily reduces the availability of tryptophan (TRP), thereby decreasing central and peripheral 5-HT synthesis. From previous studies, ATD is known to affect GI physiology and enhance visceral pain perception in the colon. The aim of the study was to investigate the effect of ATD on esophageal sensitivity in healthy volunteers (HV). Esophageal multimodal sensitivity was assessed after intragastric infusion of an amino-acid mixture (AA-mix) containing 15 AAs with TRP (control condition) or without TRP (ATD condition). After an incubation period of 5 hours, a probe with a polyurethane bag was positioned in the distal esophagus. Thermal (recirculating a heated saline solution through the bag), mechanical (increasing bag volume), electrical (2 stimulation electrodes) and chemical sensitivity (modified Bernstein) were tested and at 3 time points blood samples were collected for biochemical analysis. General mood was assessed by the Positive and Negative Affect Schedule (PANAS) and the State-Trait Anxiety Inventory (STAI) questionnaires.
Recently it has been reported that a consistent percentage of the general population consider themselves to be suffering from problems caused by wheat and/or gluten ingestion, even though they do not have CD or wheat allergy. This clinical condition has been named Non-Celiac Gluten Sensitivity' (NCGS). In a previous paper the investigators suggested the term 'Non-Celiac Wheat Sensitivity' (NCWS), since it is not known what component of wheat causes the symptoms in NCGS patients, and the investigators also showed that these patients had a high frequency of coexistent multiple food hypersensitivity. The clinical picture of NCWS is characterized by combined gastrointestinal (bloating, abdominal pain, diarrhea and/or constipation, nausea, epigastric pain, gastroesophageal reflux, aphthous stomatitis) and extra-intestinal and/or systemic manifestations (headache, depression, anxiety, 'foggy mind,' tiredness, dermatitis or skin rash, fibromyalgia-like joint/muscle pain, leg or arm numbness, and anemia). Nowadays no data are available on the abdominal ultrasonographic features of NCWS patients. Therefore, the aim of the present study is to evaluate the abdominal ultrasonographic features of NCWS patients in comparison with patients affected with celiac disease.
The aim of this study was to investigate the effect of naloxone (IV or IM administration) and methylnaltrexone (subcutaneous administration) on esophageal sensitivity, in a group of healthy volunteers in order to evaluate the role of endogenous opiods in symptom perception in gastro-esophageal reflux disease. Esophageal sensitivity was assessed by using a multimodal esophageal stimulation protocol where sensitivity to thermal, mechanical, electrical and chemical stimulation was tested.
Investigators will test the hypothesis that chronic restoration of vagal nerve activity with a central acetylcholinesterase inhibitor improves insulin sensitivity and reduces adipose tissue oxidation in obese African American Women compared to white women.
This is an open-label, follow-up study for subjects who completed the PEPITES study. Subjects will be offered enrollment in this follow-up study to receive Viaskin Peanut 250 μg for 2 additional years if previously on active treatment in the PEPITES study, or for 3 years if previously on placebo in the PEPITES study.
This study aims to investigate differences in digestion rates and gastrointestinal problems caused by pasteurized; pasturized and homogenized as well as UHT-treated homogenized cow's milks in healthy adults by diary of symptoms, blood glucose and triacylglycerol levels and plasma cytokine levels.
In the last few years a new clinical entity has emerged which includes patients who consider themselves to be suffering from problems caused by wheat and/or gluten ingestion, even though they do not have celiac disease (CD) or wheat allergy. This clinical condition has been named non-celiac gluten sensitivity (NCGS), although in a recent article, the researchers suggested the term "non-celiac wheat sensitivity" (NCWS), because it is not known to date what component of wheat actually causes the symptoms. The clinical picture of NCWS is characterized by combined gastrointestinal (bloating, abdominal pain, diarrhea and/or constipation, nausea, epigastric pain, gastroesophageal reflux, aphthous stomatitis) and extra-intestinal or systemic manifestations (headache, depression, anxiety, 'foggy mind,' tiredness, dermatitis or skin rash, fibromyalgia-like joint/muscle pain, leg or arm numbness, and anemia). Lactose intolerance and cow's milk protein allergy (CMPA) are two medical conditions with a very high prevalence in the general population, and there is a large overlap between NCWS symptoms and lactose intolerance and CMPA symptoms. Therefore, the aims of the present study are to investigate 1) the prevalence of positive lactose breath test and DBPC cow's milk protein challenge in NCWS patients with self-reported gastrointestinal symptoms related to milk and/or milk derivates ingestion, 2) the clinical, serological, and histological characteristics of NCWS patients with lactose intolerance and CMPA in comparison to NCWS patients without lactose intolerance and CMPA.
This study aims to show whether the hyperglycaemic phases following a treatment with glucocorticoids, as well as blood measurements correlated to high blood glucose levels and insulin resistance, vary significantly between patients with and without gestational diabetes mellitus.