Clinical Trials Logo
  1. Home
  2. Allergy
  3. NCT01147159

Biological Standardization of Allergen Extracts of Pollens of Betula Pendula, Phleum Pratense and Mite Extract of Dermatophagoides Pteronyssinus

Allergy Clinical Trial

Official title:
Biological Standardization of Allergen Extracts of Pollens of Betula Pendula, Phleum Pratense and Mite Extract of Dermatophagoides Pteronyssinus in Patients With Rhinoconjunctivitis With/ Without Asthma Sensitized to Betula Pendula, Dermatophagoides Pteronyssinus and Phleum Pratense An Open-label, Single-center Study

Clinical Trial Summary

Allergen extracts are complex mixtures of proteins and contain varying amounts of allergenic and non-allergenic components. Many factors such as the biovariability, differences in extraction process and subsequent handling of allergens can affect the final composition, potency, and stability of allergen preparations. Genetic diversity of affected people adds another level of complexity. In order to control variability and to achieve consistency and reproducibility for optimal safety and sensitivity/specificity, it is essential to standardize the amount of allergen used in prick tests. Therefore, the system for biological standardization mainly used in Europe still is the biological calibration of in-House Reference Preparations (IHRP). The method has been adopted by the Nordic Council on Medicines as the Nordic Biological Unit, Histamine Equivalent Potency (HEP) or Skin Prick Test (SPT) value. The aim of this procedure is to estimate the biological activity of allergen extracts. The activity of an allergen extract is defined as 10,000 Diagnostic Biological Units (DBU) per ml (1 SPT per ml), when the extract provokes a specific skin reaction with a wheal of the same size as a wheal provoked by reference histamine at a concentration of 10 mg/ml, when both solutions are administrated using the same technique (prick testing) on at least 20 individuals who are clinically allergic and cutaneously reactive to the allergen concerned.

The present study aims to standardize the allergen extracts of Betula pendula, Phleum pratense and Dermatophagoides pteronyssinus by using this method.

- Trial with medicinal product

Clinical Trial Description

n/a

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT01147159
Study type Interventional
Source Roxall Medicina España S.A
Contact
Status Completed
Phase Phase 2
Start date December 2010
Completion date April 2011
View Details
See also
  Status Clinical Trial Phase
Terminated NCT02032056 - Effect of Probiotics in Reducing Infections and Allergies in Young Children During the Complementary Feeding Period N/A
Completed NCT01842711 - Cumulative Irritation Patch Test N/A
Completed NCT01633840 - New Validated Recipes for Double-blind Placebo-controlled Low Dose Food Challenges N/A
Completed NCT00554983 - Efficacy and Safety From a Recombinant Folding Variant of Bet v 1 Phase 3
Completed NCT00997971 - Growth, Tolerance in Healthy Infants Fed a Partially Hydrolyzed Rice Protein Phase 3
Completed NCT00331929 - Respiratory Health Study of Children in Kiryat Tivon N/A
Completed NCT00232518 - Randomised Controlled Clinical Trials of the Effect of Therapeutic Hookworm Infection in Allergic Rhinoconjunctivitis N/A
Completed NCT00220753 - Air Cleaners for Children and Adolescents With Asthma and Dog Allergy N/A
Completed NCT04046731 - Neuromuscular Blocking Agents Utilized During Perioperative Hypersensitivity Evaluation N/A
Completed NCT04126096 - Negative Predictive Value and NIC of Beta-Lactam Antibiotics. N/A
Completed NCT04004351 - Treatment Modalities in Children and Adolescents Suffering From HDM-induced Allergic Rhinitis and/or Asthma
Not yet recruiting NCT05997784 - Study of Indoor Air Pollutants and Their Impact in Childhood Health and Wellbeing
Completed NCT04418999 - Safety and Efficacy of Intracanalicular Dexamethasone Compared to Loteprednol Etabonate in Patients With Keratoconus Early Phase 1
Completed NCT04186949 - Early Origins of Allergy and Asthma
Completed NCT02127801 - Single Ascending-dose Study of the Efficacy, Safety, Tolerability, and Pharmacokinetics of REGN1908-1909 in Allergic, Adult Participants Phase 1
Enrolling by invitation NCT05011071 - The Alberta BLOOM Premature Child Study
Not yet recruiting NCT06330974 - Allergy, Asthma, and Atopic Eczema in Finland
Completed NCT02596321 - A Study Investigating the Immunologic Effects and Safety of 60-day Treatment of the ALK HDM Tablets in Adult Subjects With HDM-Induced Allergic Rhinitis and/or Atopic Asthma Phase 3
Completed NCT02306473 - The Leaky Lung Test Early Phase 1
Terminated NCT02601690 - Observational Analysis of T Cell Responses to SPIREs for Multiple Allergens in Subjects With Allergy in North America