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

Brazilian Journal of Medical and Biological Research

A.e. Lima Barros²  A.m.p. Almeida¹  L.b. Carvalho Jr.²  W.m. Azevedo¹ 

[1] ,Universidade Federal de Pernambuco Laboratório de Imunopatologia Keizo Asami and Departamento de Bioquímica Recife PE ,Brasil

关键词: Polysiloxane;    Polyvinyl alcohol;    Solid phase;    Immunodetection;    Yersinia pestis;    ELISA;   

DOI  :  10.1590/S0100-879X2002000400008

来源: SciELO

【 摘 要 】

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 µg 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 µg/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.

【 授权许可】

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