Active clinical trials for "Hypersensitivity"

Background: Urticaria is a common itchy skin disorder that may occur spontaneously or on exposure to a physical trigger (called physical urticaria). Researchers are studying the genetic basis of a physically induced urticarial syndrome. Once called familial cold urticaria, this condition is now called familial cold autoinflammatory syndrome (FCAS). FCAS is an autoinflammatory disease, a group of inherited disorders characterized by unprovoked episodes of inflammation. Patients with FCAS often have hives, joint pain, and fever following general exposure to cold. Patients with FCAS have a mutation in a gene that makes a protein called cryopyrin. Cryopyrin seems to be involved with the production of a proinflammatory mediator called interleukin-1 (IL-1). Patients with FCAS and others with autoinflammatory syndromes have benefited from medication that blocks the effects of IL-1. Objectives: To investigate mechanisms that may cause physical hives or urticaria. To reproduce urticaria through challenge testing (procedures to test the skin for a reaction to a stimulus), followed by mast cell studies, measurement of IL-1, genetic studies, and other molecular studies to lead to a better understanding of urticaria and to design safe and more effective treatments. Eligibility: Patients between 6 months and 65 years of age with a documented history of clinically reproducible physical urticaria that triggers hives and that has been evaluated by a physician. Patients should have a letter of referral, including copies of pertinent medical history and laboratory studies, from a referring physician. Affected and nonaffected family members of such patients. Exclusion criteria include (1) the presence of conditions that may put the subject at undue risk, such as acute infection, severe thrombocytopenia (a lower than normal number of platelets in the blood), or significant cardiovascular disease; (2) any condition that would make the subject unsuitable for enrollment in this study; and (3) a history of HIV, other known immunodeficiency, or evidence of chronic Hepatitis B and/or C infection. Design: Researchers will conduct the following tests to verify which triggers cause the hives: History and physical exam to determine the relationship between the trigger and appearance of the hives. Blood samples for baseline screening (additional samples may be taken within 8 hours of triggering hives). Verification of hives using standard challenge testing. Procedures to trigger urticaria (the challenge testing) include dermatographism (stroking the skin), delayed pressure urticaria (direct pressure), cold-induced urticaria (cold exposure), cholinergic urticaria (exercise, hot water), solar urticaria (sun exposure), localized heat urticaria (direct heat exposure), aquagenic urticaria (room temperature water), and vibratory angioedema (direct vibratory stimulus exposure). Participants who have a positive history for hives and failed challenge testing (that is, hives resulted from the triggers) will be asked to provide a skin biopsy and additional bloods samples for research purposes. Participants will be asked to return to the clinic within 1 month if multiple triggers could not be verified during the initial visit, or to return for additional research evaluations, which may include a skin punch biopsy and blood sample collection. Patients may have to stay at the hospital overnight, if required to document the disease. Nonaffected family members who enroll in this protocol will provide samples for comparison with the family member who has a history of hives. Participants will receive a small financial compensation for the skin biopsy.

To explore the relationship between clinical response to erenumab and response to intravenous infusion of calcitonin gene-related peptide in individuals with migraine.

Fibromyalgia (FM) is a chronic musculoskeletal pain disorder with unknown causes. Our previous studies showed abnormal sensations of second pain (wind-up), indicating central hypersensitivity as an important mechanism of FM. Triggering events have been implicated as the cause of central hypersensitivity.

This study tests the effects of cannabinoid levels in blood on inflammation and insulin sensitivity both acutely and chronically in individuals across the weight spectrum. To that end, the study employs two observational designs: 1) A study of acute effects with intermittent cannabis users and 2) A study in which current cannabis users will select one of three cannabis strains for four weeks and are compared to a matched control group who do not use cannabis to study chronic effects. Blood levels of THC and CBD, inflammatory biomarkers, and insulin resistance will be measured in both studies.

The purpose of this study is to compare the effects of a low-fat, plant-based dietary intervention and a portion-controlled dietary intervention (compliant with current American Diabetes Association (ADA) guidelines) on changes in intramyocellular and hepatocellular lipid content in adults with type 2 diabetes. Changes in insulin sensitivity and glycemic control will also be assessed in this study. The study duration is 44 weeks.

In Taiwan, according to the birth notification statistics of the Ministry of Health and Welfare. 164,496 newborns were born in 2020, with preterm births accounting for about 11.58%.Most preterm infants need to be hospitalized for highly specialized care, resulting in the separation of preterm infants from their parents after birth, which may have a negative impact on the healthy attachment development between parents and preterm infants. Moreover, due to the vulnerability of preterm infants, parents often lack the confidence to take care of them.

This trial is test the dentin hypersenstivity using Giomer based Varnish versus Bioactive glass air polishing system in patients with non-cervical lesions.

To evaluate the safety and tolerance of MCLA-129 combined with Befotertinib in patients with advanced non-small cell lung cancer with EGFR-sensitive mutations.

By using a highly sensitive serum M protein detection method based on the MALDI-TOF MS platform, serum monoclonal immunoglobul (M protein) in detection was performed on the visiting patients to explore the positive rate of serum M protein and its distribution in different departments. And exploring the correlation analysis between the relative concentration of serum M protein based on the above highly sensitive methods and clinical indicators.

Influence of placing the esophageal probe on the cortisol response. Number of cortisol (non)responders and association of heart rate and subjective perception of stress with cortisol levels.