| Autor: |
Ludmilla Dela Coletta Troiano Araujo, Daniel Ernesto Rodriguez-Fernández, Susan Grace Karp, Ellen de Souza Marquez, Aline Cristina dos Santos, Manuel Hospinal-Santiani, Raphael Aparecido Boschero, Eliezer Lucas Pires Ramos, Vanete Thomaz-Soccol |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Brazilian Archives of Biology and Technology, Vol 64, Iss spe (2021) |
| Druh dokumentu: |
article |
| ISSN: |
1678-4324 |
| DOI: |
10.1590/1678-4324-75years-2021210127 |
| Popis: |
Abstract The rapid and accurate diagnosis of tuberculosis (TB), especially considering limited resources, is still a challenge. Development of new methodologies and tests are needed to overcome several disadvantages of the available standard tests. We evaluated the diagnostic potential of two antigens specific for Mycobacterium tuberculosis, the CFP10 and ESAT6 recombinant proteins, and developed stable formulations thereof. Sensitivity and specificity of the delayed-type hypersensitivity (DTH) skin testing and the induction of gamma interferon production (IFN-γ) by lymphocytes, as a non-invasive test, were evaluated using the CFP10 and ESAT6 protein formulations. The recombinant proteins produced by our group presented a high DTH response and the ability to differentiate between tuberculosis infection, BCG vaccination, and the contact with non-tuberculous mycobacteria (NTM). The production of IFN-γ by stimulation with individual and combined proteins was detected in a panel of 40 individuals and showed a specificity of 100% and a sensitivity of 90% when the two proteins were used together. Lyophilized formulations were stable under all conditions, while soluble formulations were stable under freezing at -20 ºC and -80 ºC. The proposed formulations containing the ESAT6 and CFP10 recombinant antigens constitute satisfactory tools for TB testing, suitable to be developed and implemented in a large-scale trial. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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