Methods and compositions for the detection and treatment of...

C - Chemistry – Metallurgy – 07 – K

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C07K 14/205 (2006.01) A61K 39/106 (2006.01) G01N 33/569 (2006.01)

Patent

CA 2179153

A library of isolated and purified antigens specific for a micoorganism is a set of individual molecules. The library forms antigen- antibody complexes useful in the context of diagnosing and treating conditions associated with a specific microorganism such as H. pylori-induced gastro-duodenal disease. For the antigen-antibody complexes in question the antibody is an immunoglobulin, which is IgE if the antigens are allergens. Complexes with IgA, IgG and IgM are also useful. By this multivariate approach, a specific condition is diagnosed with high sensitivity and specificity by determining whether complexes form between a specific antigen library and a biological sample which contains immunoglobulins from an individual. Such libraries also are useful for immunotherapy.

Bibliothèque d'antigènes isolés et purifiés, spécifiques d'un micro-organisme, et se présentant sous la forme d'un ensemble de molécules individuelles. Cette bibliothèque est constituée de complexes antigènes-anticorps qui servent au diagnostic et au traitement de troubles associés à un micro-organisme spécifique, tels que les affections gastro-duodénales dues au H. pylori. Pour les complexes antigènes-anticorps en question, l'anticorps est une immunoglobuline, du type IgE si les antigènes sont des allergènes; les complexes avec IgA, IgG, et IgM s'avèrent également utiles. Cette approche avec variations multiples permet de diagnostiquer un état particulier avec une grande sensibilité et une grande spécificité, en déterminant s'il y a formation de complexes entre une bibliothèque spécifique de l'antigène et un échantillon biologique contenant des immunoglobulines prélevées sur un patient. De telles bibliothèques ont également leur utilité en immunothérapie.

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