University of Houston System

Craig Vollert

Jason Eriksen

Steven Bark

Wilna Moree

In some embodiments, the present disclosure pertains to a method for retrieving at least one molecular recognition element in a fixed tissue. In some embodiments the method comprises preparing a solution comprising at least one aldehyde-scavenging agent. In some embodiments, the method comprises contacting the fixed tissue with the solution. In some embodiments, the tissue is fixed with an aldehyde-based cross-linking agent. In some embodiments, a reaction of the aldehyde-scavenging agent with the aldehydes comprising the cross-linking agent retrieves the at least one molecular recognition element. In some embodiments, the at least one molecular recognition element comprises of amino acids, peptides, proteins, nucleic acids, carbohydrates, lipids, or a combination thereof. In some embodiments, the at least one aldehyde-scavenging agent comprises of beta-dicarbonyl compounds, mono or di-amide scavengers, ethyl alcohols, sulfur containing compounds, mercaptoethylamines, mercaptoethanols, hydrazines, ethanolamines, hydroxylamines, anilines, variation of amines, activated charcoal, phenols, or mixtures and combinations thereof.

Aldehyde scavenging agent for retrieving elements from fixed tissue

Method of retrieving elements from fixed tissue

Provided herein are methods, compounds, mixtures and formulations of antigen retrieval agent useful in retrieving antigens and improving the detection of amino acids, peptides and proteins or epitopes thereon in a tissue fixed with aldehyde-based cross-linking agents. Contacting the fixed tissue with a solution of the aldehyde scavenging agent causes reactivity with the aldehyde moieties to retrieve antigens and improve detection of the amino acids, peptides and proteins or epitopes. Also provided are kits comprising the antigen retrieval agent and, optionally, components for staining or detecting the proteins or the antigens or epitopes and instructions for using the kit. Further provided is a method for identifying an antigen retrieval agent. A fixed protein is contacted with an agent to be tested and heated in solution therewith. Detection of protein peaks via mass spectrometry indicates the tested agent is an antigen retrieval agent.

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Houston, TX, United States of America

Craig Vollert