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Biomedical subjects

I Giaever

Publications and source records attributed to I Giaever.

41 records · Page 3Linked to original sources
PubMed1978

A simple visual surface immunology test.

A new general immunology test is described which is capable of detecting protein in the 1 microgram/ml range. First an antigen is adsorbed in a small area of a glass surface. The glass is exposed to an antibody solution and the antibody will attach specifically to the antigen. Next the slide is washed, dried and sprayed lightly with plastic particles that stick to the protein layers on the glass. Now when the glass slide is exposed to an acid the antigen--antibody bonds are broken, the antibodies will leave the surface removing some of the plastic particles and leaving an easily visible spot behind.

Animals↗
PubMed1978

Cell adhesion to substrates containing adsorbed or attached IgG.

When most mammalian cells are propagated in tissue culture, they are attached to a solid surface. This surface is commonly covered with a layer of serum protein. In this study we looked at the effect of the protein layer on the interaction between the cells and the surface by precoating the surface with various pure protein molecules. We found no differences between surfaces covered with pure protein layers and those covered with serum proteins except when antibody molecules were used. In all cases the cell types used avoided surfaces covered with antibody molecules. Previously, other investigators have established that some cells belonging to the immunology system are attracted to such surfaces.

Antigen-Antibody Complex↗
PubMed1976

Visual detection of carcinoembryonic antigen on surfaces.

An attempt is made to detect carcinoembryonic antigen (CEA) at clinically interesting concentrations by using a simple immunologic surface test. Antibodies to CEA are detected in a direct test at concentrations below 1 ng/ml. The sensitivity of this assay is mainly limited by diffusion to the reacting surface. CEA is detected in an inhibition test at concentrations down to 20 ng/ml. The sensitivity of this inhibition test is limited by the average equilibrium constant in solution of the antibody-antigen reaction.

Adsorption↗
PubMed1974

Visual detection of hepatitis B antigen.

When the hepatitis B antigen is first adsorbed on a specially prepared metal surface, the subsequent reaction with its specific antibody produces complexes that are visible to the unaided eye. Application of this principle has led to the development of tests for both antigen and antibody that compare favorably with the sensitivity obtained by radioimmunoassay.

Animals↗