[Use of 3,3',5,5'-tetramethylbenzidine as substrate in immunoenzyme analysis]

Area of Science:

• Virology
• Biochemistry
• Immunology

Background:

• Solid-phase enzyme immunoassay and dot enzyme immunoassay are crucial for detecting viral antigens.
• Traditional substrates like ortho-phenylenediamine and ortho-toluidine have potential carcinogenicity.
• There is a need for safer and effective substrates in immunoassay techniques.

Purpose of the Study:

• To evaluate the efficacy of 3,3",5,5'-tetramethylbenzidine (TMB) and its derivatives as substrates in arbovirus detection.
• To compare the sensitivity and specificity of TMB-based assays with existing methods.
• To assess the safety profile, specifically carcinogenicity, of TMB and its derivatives.

Main Methods:

• Experiments were conducted using arboviruses.
• Solid-phase enzyme immunoassay and dot enzyme immunoassay on membrane filters were employed.
• The performance of TMB and its derivatives was evaluated against ortho-phenylenediamine and ortho-toluidine.

Main Results:

• 3,3",5,5'-tetramethylbenzidine and its derivatives demonstrated suitability for detecting viral antigens.
• The tested substrates provided adequate sensitivity, comparable to routinely used substrates.
• A significant advantage observed was the absence of carcinogenicity in the tested TMB-based substrates.

Conclusions:

• 3,3",5,5'-tetramethylbenzidine and its derivatives are effective and safe alternatives for arbovirus detection via immunoassay.
• These substrates offer comparable analytical sensitivity to traditional reagents.
• The non-carcinogenic nature of TMB-based substrates presents a significant advantage for laboratory safety.