Isolation, Characterization, and HPTLC-Quantification of Compounds with Anticancer Potential from Loranthus Acaciae Zucc

Omar M. Noman, Fahd A. Nasr, Ramzi A. Mothana, Ali S. Alqahtani, Wajhul Qamar, Abdullah A. Al-Mishari, Adnan J. Al-Rehaily, Nasir A. Siddiqui, Perwez Alam, Omer M. Almarfadi
2020 Separations  
The cytotoxic effects of the crude extract of Loranthus acaciae Zucc. and its n-hexane, chloroform, and n-butanol fractions were assessed against three cancer cell lines using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay. Cell apoptosis was determined using an annexin V-phycoerythrin/7-aminoactinomycin kit. We observed that the L. acaciae n-hexane extract (LAHE) could inhibit cancer cell growth, particularly of MCF7 and A549 cells. Chromatographic purification of LAHE
more » ... and nuclear magnetic resonance analysis led to the identification of two compounds from this plant species, namely, betulinic acid and β-sitosterol, for the first time. Flow cytometry study suggested that betulinic acid induced cell death via apoptosis, as a distinguished marked enhancement in the early and late apoptosis of human lung (A549) and breast (MCF-7) cancer cell lines. The isolated compounds were further estimated concurrently in LAHE using a validated high-performance thin-layer chromatographic (HPTLC) method on a 10 × 10 cm2 HPTLC plate with chloroform, methanol, and glacial acetic acid (97:2:1, v/v/v) as the mobile phase and a λmax of 540 nm. The amounts of betulinic acid and β-sitosterol in LAHE were 69.46 and 135.53 µg/mg of dried weight of extract, respectively. The excellent cytotoxic effect of LAHE could be attributed to the presence of ample amounts of betulinic acid.
doi:10.3390/separations7030043 fatcat:xelma46rdvhchb2nxmnpu6hs6a