Abstract: The invention relates to a method of preservation of nucleic acid sequences in histological tissues which comprises: treating a concentrated formaldehyde solution in water with basic ion-exchange resins; diluting the resulting acid-deprived formaldehyde solution with phosphate buffer pH 7.2-7.4 up to a concentration ranging between 2 and 4%; contacting the resulting acid-deprived formaldehyde solution obtained with the tissue samples; optionally embedding the samples fixed in paraffin.
Type:
Application
Filed:
December 15, 2020
Publication date:
January 19, 2023
Applicant:
ADDAX BIOSCIENCES S.R.L.
Inventors:
Giovanni Bussolati, Benedetta Bussolati, Nicolo' Bussolati
Abstract: The invention refers to a composition for the fixation of histological preparations, comprising a solution of glyoxal, wherefrom acids, normally present in the commercially available glyoxal, have been removed. The composition of the invention provides an optimal fixative for the preservation of structure, antigenic components and nucleic acids in tissues. The acid-free glyoxal has limited toxicity, is not considered as a carcinogenic agent and represents a valid alternative to formalin for the fixation of tissues and cells.
Abstract: The invention refers to a composition for the fixation of histological preparations, comprising a solution of glyoxal, wherefrom acids, normally present in the commercially available glyoxal, have been removed. The composition of the invention provides an optimal fixative for the preservation of structure, antigenic components and nucleic acids in tissues. The acid-free glyoxal has limited toxicity, is not considered as a carcinogenic agent and represents a valid alternative to formalin for the fixation of tissues and cells.
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