Abstract
As a member of the tumor necrosis factor (TNF) superfamily, the B-cell activating factor (BAFF) plays a crucial role in B-cell survival and differentiation. Overexpression of this protein has been closely linked to autoimmune disorders and some B-cell malignancies. Using monoclonal antibodies (mAbs) against the BAFF soluble domain appears to be a complementary treatment for some of these diseases. This study aimed to produce and develop a specific Nanobody (Nb), a variable camelid antibody domain, against the soluble domain of BAFF protein. After camel immunization with recombinant protein and preparing cDNA from total RNAs separated from camel lymphocytes, an Nb library was developed. Individual colonies capable of binding selectively to rBAFF were obtained by periplasmic-ELISA, sequenced, and expressed in a bacterial expression system. The specificity and affinity of selected Nb were determined and its target identification and functionality were evaluated using flow cytometry.
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