Potential application of immobilized streptokinase extracted from Streptococcus equinus VIT_VB2.

Streptokinase purified from Streptococcus equinus VIT_VB2 isolated from bovine milk sample was immobilized in various solid supports namely entrapment in agarose gel, calcium alginate beads and gelatin gel by cross-linking with formaldehyde. Immobilization of streptokinase in calcium alginate beads showed maximum efficiency (81.8 ± 1.06%) when compared with entrapment with agarose gel (55.6 ± 2.17%) and cross-linked gelatin formaldehyde gel (71.0 ± 1.54%). The purified SK activity was expressed maximum in calcium alginate (1%) and gelatin gel (0.25%) with 1292.68 ± 1.33 and 1121.9 ± 1.2 U mL-1 , respectively. Similarly, SK entrapped in gelatin gel and calcium alginate showed maximum in vitro blood clot lysis activity with 77.67 ± 2.64% and 76.16 ± 2.72%, respectively. The immobilized SK in gelatin gel showed complete clot lysis within 15 min; hence, this application of the study could be used in the treatment of superficial thrombophlebitis, phlebitis, and venous thrombosis. These beads were used for three repeated cycles to check the conversion of substrates into their products, and we concluded that SK can be immobilized in the suitable matrices. Therefore, this helps in the drug-delivery strategies in highly efficient way, moreover, economically competent process in the pharmaceutics.