Polysiloxane/PVA-glutaraldehyde hybrid composite as solid phase for immunodetections by ELISA

We developed an efficient method to prepare a hybrid inorganic-organic composite based on polyvinyl alcohol (PVA) and polysiloxane using the sol-gel disc technique. Antigen obtained from Yersinia pestis was covalently immobilized onto these discs with glutaraldehyde and used as solid phase in ELISA...

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Bibliographic Details
Published in:Brazilian journal of medical and biological research 2002-04, Vol.35 (4), p.459-463
Main Authors: Lima Barros, A E, Almeida, A M P, Carvalho, Jr, L B, Azevedo, W M
Format: Article
Language:English
Subjects:
Animals
Antigens, Bacterial - isolation & purification
BIOLOGY
ELISA
Enzyme-Linked Immunosorbent Assay - instrumentation
Enzyme-Linked Immunosorbent Assay - methods
Fixatives
Glutaral
Immunodetection
MEDICINE, RESEARCH & EXPERIMENTAL
Polysiloxane
Polyvinyl alcohol
Polyvinyl Alcohol - chemistry
Rabbits
Siloxanes - chemistry
Solid phase
Yersinia - immunology
Yersinia pestis
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Summary:We developed an efficient method to prepare a hybrid inorganic-organic composite based on polyvinyl alcohol (PVA) and polysiloxane using the sol-gel disc technique. Antigen obtained from Yersinia pestis was covalently immobilized onto these discs with glutaraldehyde and used as solid phase in ELISA for antibody detection in serum of rabbits experimentally immunized with plague. Using 1.25 microg antigen per disc, a peroxidase conjugate dilution of 1:4,000 and a serum dilution of 1:200 were adequate for the establishment of the procedure. These values are similar to those used for PVA-glutaraldehyde discs, plasticized filter paper discs and the polyaniline-Dacron composite discs. This procedure is comparable to that which utilizes the adsorption of the antigen to conventional PVC plates, with the amount of antigen being one fourth that employed in conventional PVC plates (5 microg/well). In addition to the performance of the polysiloxane/PVA-glutaraldehyde disc as a matrix for immunodetection, its easy synthesis and low cost are additional advantages for commercial application.
ISSN:0100-879X
1414-431X
0100-879X
1414-431X
DOI:10.1590/S0100-879X2002000400008