Modifikasi dan Sintesis Peptida Turunan Bisa Ular Tanah (Calloselasma rhodostoma) Untuk Penghambatan Sel Kanker Payudara (T47D dan MCF-7) Secara In Vitro
Bunga Surya Eka Sari, Respati Tri Swasono, S.Si, M.Phil., Ph.D; Prof. Dr. Winarto Haryadi, M.Si.
2025 | Tesis | S2 Ilmu Kimia
Cancer is one of the most fatal diseases, characterized by uncontrolled cell growth and the ability to metastasize to various body tissues. One promising alternative therapeutic strategy is the use of anticancer peptides (ACPs), which offer advantages such as high potency, good selectivity, and low toxicity. This study aims to validate the anticancer activity of peptides derived from the Malayan pit viper (Calloselasma rhodostoma) venom against T47D and MCF-7 breast cancer cells through an in silico approach, to modify these peptides to enhance their anticancer activity, and to evaluate the activity of the modified peptides against both cell lines.
The results showed that among ten bioactive peptides analyzed, VK9 (VHFNAQVIK) exhibited the highest anticancer activity, with IC50 values of 33.30 µg mL-1 in T47D cells and 70.07 µg mL-1 in MCF-7 cells. In silico analysis revealed that VK9 showed binding energies (?G) of -8.5 kcal mol-1 toward both p53 and progesterone receptors. Modification at the seventh amino acid position produced the peptide VK9_7L (VHFNAQLIK), which emerged as the best candidate, with binding energies (?G) values of -8.9 kcal mol-1 for the p53 receptor and -9.5 kcal mol-1 for the progesterone receptor. Further in vitro assays demonstrated that VK9 and VK9_7L had IC50 values of 130.88 and 98.69 µg mL-1, respectively, against T47D cells, with selectivity indices of 1.05 and 16.74. These peptides also showed activity against MCF-7 cells, with IC50 values of 57.93 and 28.98 µg mL-1 and selectivity indices of 2.37 and 56.98, respectively.
Kata Kunci : Antikanker payudara, Bisa, In vitro, Modifikasi peptida, Ular tanah