Active clinical trials for "Hypersensitivity"

The Atopy Registry aims to assess data about atopic disorders and their medical care in a standardized form. With this, the comparative efficacy, tolerability and safety of systemic therapies for atopic disorders should be investigated. An optional additional module "Bioanalytic" shall provide insights into further connections regarding immunology, genetics and microbiome.

The primary purpose of this study is to investigate the portion of penicillin allergy labels that are not true allergies using oral amoxicillin challenges among pediatric patients. The secondary purpose is to evaluate the safety and feasibility of administering oral penicillin allergy challenges in the Pediatric Emergency Department.

Single-center, case-control, longitudinal, observational, population based cohort study with stratified sample (by age group, gender, and residential area).

Background: - About 15 million Americans have a food allergy. Because there are no cures or effective prevention or treatment for food allergies, researchers want to learn more about them. Objective: - To learn more about the causes and effects of food allergy and related conditions. Eligibility: People ages 2 99 who have food allergy and/or a related genetic or other condition Their relatives Healthy relatives and volunteers Design: Participants will have at least 3 visits over 1 2 years, and then once a year for up to 12 years. Each may last a day or longer. Participants will be screened with medical history, physical exam, and questionnaires. Participants may have the following: Blood tests Allergy skin prick tests: Drops of allergens are placed on the back or arm. The skin is scratched under each drop. Leukapheresis: blood is taken from a needle in one arm, passed through a machine, and returned through a needle in the other arm. X-rays Esophageal string test: One end of a string is taped to the cheek and the other end is packed into a capsule. When the capsule is swallowed, the string unwinds; it is left in for at least 1 hour. EGD and colonoscopy: Biopsies are taken from the gastrointestinal system. Tiny biopsies of skin Photographs of the body Collection of cells through: Swab of nose, inside of cheek, or skin Gentle skin scrape Tape stripping: piece of tape is put on the skin and pulled off.

The project is focussed on evaluating the impact of using a female-specific threshold in the diagnosis of myocardial infarction. This female threshold is lower than the overall hs-cTn threshold currently in use. The investigators hypothesize that this change in process, applied at the hospital level, will lead to better assessment, treatment and outcomes of women presenting to the emergency department with chest pain that is cardiac in nature.

This is an observational study in which only data are collected from participants receiving their usual treatment. In this study, data will be collected and studied from men with metastatic hormone-sensitive prostate cancer (mHSPC). Prostate cancer is a common cancer in men that starts in the prostate gland, a male reproductive gland found below the bladder. Metastatic means that the cancer has spread to other parts of the body. Hormone-sensitive means it can be treated with hormone-therapy such as androgen deprivation therapy (ADT). ADT lowers the level of testosterone, a male hormone, and slows down the growth of cancer cells. Men with mHSPC and who have been decided by their own doctors to be treated with darolutamide in combination with ADT and docetaxel can join this study. Darolutamide works by blocking the testosterone signals to slow the growth of the cancer cells. Docetaxel is a medicine used to treat different types of cancer. It works by stopping the growth and spread of cancer cells. Darolutamide in combination with docetaxel and ADT is an approved treatment for men with mHSPC. It was approved based on a study called ARASENS. More information is needed on how safe darolutamide is when given with ADT and docetaxel in Japanese men with mHSPC. The main purpose of this study is to collect information about the safety of this combination treatment in Japanese participants with mHSPC under real-world conditions. The main information that researchers will collect: Number and severity of heart-related medical problems participants have during the treatment Other information that researchers will collect: Number and severity of all medical problems participants have during the study Age and other information about the participants such as their illness, medical history, and other medicines taken at the same time Treatment pattern of darolutamide such as the amount of medicine given, the duration for which it is given, and any changes made to the treatment Data will be collected from August 2023 to July 2026. Researchers will observe participants from the start of darolutamide treatment until 30 days after they receive their last dose of docetaxel, which is expected to be approximately 6 months for each participant. In this study, data from regular health visits will be collected. No visits or tests are required as part of this study.

EVITA is a multicentric Latin-American prospective cohort on chronic hypersensitivity pneumonitis. EVITA's objective is to identify phenotypes and/or endotypes associated with different disease trajectories measured primarily by forced vital capacity (FVC) during a 24 month follow-up period. Other secondary measures of disease progression will also be investigated such as imaging, time to death or lung transplantation, and patient-reported outcomes

Polycystic ovary syndrome (PCOS) is a common endocrinological disorder seen in 6%-10% of women (Human Reproduction, 2004). It is characterized by polycystic ovaries, anovulatory cycles, and hyperandrogenism. In nearly 20% of infertile women, PCOS is said to be the key reason behind infertility (Norman et al., 2007). PCOS is a syndrome that manifests variably from adolescence as oligomenorrhea or hirsutism or obesity and goes on to affect the reproductive performance of the female by causing anovulation. Some may even be severely affected by metabolic syndrome, diabetes mellitus, or endometrial carcinoma. It also increases the risk of ovarian and breast carcinoma (Atiomo et al., 2003). PCOS falls in WHO type II anovulation (norm-gonadotropic norm-estrogenic anovulation) and is seen in 85% of anovulatory females. Although lifestyle modification is known to improve reproductive outcomes in females with PCOS, the gold standard treatment for norm-gonadotropic oligo/amenorrheic infertility (WHO Group II) was clomiphene citrate (CC) (Radosh L., 2009) until 2018, when ESHRE and ASRM have declared letrozole as the first-line treatment for ovulation induction (OI)( ESHRE 2018 guidelines). To conclude, available data shows that letrozole is at least as effective as CC for ovulation and has comparable live birth rates. Importantly, it has definite advantages over CC. Many studies have shown letrozole to be as effective as gonadotropins, with added advantage of low cost and lower multiple pregnancy rates. However, the quality of medical evidence supporting aromatase inhibitors for OI, are inadequate, small in sample size, and inappropriate design. Moreover, there is very limited data on potential teratogenic effects, oocyte, embryo quality, and any effect on implantation. ( Misso et al., 2012) Those who fail to respond to CC are labeled as clomiphene resistant. It is common in approximately 15%-40% of women with PCOS (NICE, 2014). Major factors postulated for CC resistance include obesity, insulin resistance, (seen in nearly 50%-70% of females with PCOS) and hyperandrogenemia (Parsanezhad et al., 2001).Moreover, genetic predisposition is suggested to play a role in CC resistance (Overbeek et al., 2009).However, still, the current data available on the causes of CC resistance are not sufficient enough to direct our treatment. It is seen in various studies (Sohrevardi et al.,2016) that the females who initially failed to respond to CC develop better ovulation and pregnancy outcomes on treatment with insulin-sensitizing agents. This indicates that insulin resistance may be a cause of CC resistance in females with PCOS. In fact, insulin-sensitizing agents (Azziz et al., 2009) decrease the dose of ovulation-inducing agent and time for follicular maturation in females with PCOS. As of now, there have been no concrete studies to compare the metabolic profile of females who respond to CC and those who do not. It is still an enigma as to why some women respond to clomiphene, while others do not. By identifying the various factors which affect the response of CC in patients with infertility, a lot of time can be saved by giving alternate options of treatment to these patients. This study was done with the aim to analyze various clinical, metabolic, hormonal, and ultrasound parameters that might affect the response to clomiphene.

The PROMIS study will focus on maternal insulin sensitivity thourghout pregnancy and postpartum in a moderate to high risk population (BMI ≥25 kg/m2) in developing adverse pregnancy outcomes. Next to the OGTT, the meal tolerance test (MTT) will be used as a tool for metabolic testing. The investigators hypothesize that (early) pregnancy assessment of maternal glucose-insulin metabolism with a MTT in a moderate to high risk group identify more mothers at risk for adverse pregnancy outcomes compared with standard OGTT testing at 24-28 weeks.

IgE-mediated wheat allergy is a growing allergy problem in children, and affected children can predict with immediate-type allergic reactions to the extent of anaphylactic shock. Current diagnostic methods based on crude wheat extract are inaccurate and unreliable. Besides, these children are managed by a passive "wait-and-see" approach that reflect the natural history of wheat allergy. Nonetheless, a significant proportion of wheat-allergic children have persistent disease until school-age and adolescence. There is an unmet need for designing effective and safe immunotherapeutic strategy for wheat allergy. This study aims to investigate performance of allergy tests based on crude wheat and wheat allergens as measured using both quantitative and functional IgE-based assays for diagnosing IgE-mediated wheat allergy; and to compare efficacy and safety of different dosages of wheat oral immunotherapy (OIT) for treating these paediatric patients. For the initial part, this study will recruit children with immediate-onset adverse reactions after wheat ingestion for different allergy tests, with their wheat allergy ascertained by the gold-standard double-blind, placebo-controlled food challenge. The investigators will then recruit the wheat-allergic children into a randomized, double-blind, parallel-group clinical trial with low-dose and standard-dose wheat OIT for 12 months. The main outcomes include the diagnostic performance of different conventional and novel allergy tests for challenge-confirmed wheat allergy and the rates of desensitization and sustained unresponsiveness achieved by the two dosing regimens of wheat OIT.