title: Synthesis, structural studies, and cytotoxic evaluation of novel ursolic acid hybrids with capabilities to arrest breast cancer cells in mitosis.
abstract: Some novel chemically modified frameworks of ursolic acid have been designed and synthesized. The key step was the cycloaddition of azidopropyl-3β-hydroxy-urs-12-en-28-oate with the appropriate C28 propargyl esters of ursolic, corosolic, asiatic, oleanolic, and betulinic acid under Click reaction conditions, and the products were obtained in 74-84% yields. In view of their intriguing structural diversity, they have been subjected to detailed 1D and 2D NMR studies and their structures are thoroughly assigned. The synthesized compounds were screened for their anticancer potential against two human breast cancer cell lines (MCF-7 & MDA-MB-231) using sulforhodamine B cell proliferation assay. The GI50data revealed that the synthesized compounds exhibit highly potent activities against the two tested cell lines. Interestingly, the synthesized compounds showed selectivity and higher activity against MDA-MB-231 cell line than MCF-7. Among the tested compounds, compound 17 is the most potent one with GI50value of 1.4 ± 0.1 μM and showed 2.9 times more activity than the standard doxorubicin against MDA-MB-231. In addition, 17 arrests cells in mitotic phase of cell cycle, resulting in a change in cell phenotype. In view of the selective and highly promising activity against breast cancer cell lines, these compounds can serve as promising leads for further development.
authors.affiliation: a Natural Products Chemistry Division, CSIR-Indian Institute of Chemical Technology , Hyderabad 500007 , India.
authors.forename: Banita
authors.initials: B
authors.lastname: Pattnaik
authors.affiliation: b NMR & Structural Chemistry Division, CSIR-Indian Institute of Chemical Technology , Hyderabad 500007 , India.
authors.forename: Jerripothula K
authors.initials: JK
authors.lastname: Lakshmi
authors.affiliation: b NMR & Structural Chemistry Division, CSIR-Indian Institute of Chemical Technology , Hyderabad 500007 , India.
authors.forename: Rachineni
authors.initials: R
authors.lastname: Kavitha
authors.affiliation: b NMR & Structural Chemistry Division, CSIR-Indian Institute of Chemical Technology , Hyderabad 500007 , India.
authors.forename: Bharatam
authors.initials: B
authors.lastname: Jagadeesh
authors.affiliation: c Chemical Biology Division, CSIR-Indian Institute of Chemical Technology , Hyderabad 500007 , India.
authors.forename: Debanjan
authors.initials: D
authors.lastname: Bhattacharjee
authors.affiliation: c Chemical Biology Division, CSIR-Indian Institute of Chemical Technology , Hyderabad 500007 , India.
authors.forename: Nishant
authors.initials: N
authors.lastname: Jain
authors.affiliation: a Natural Products Chemistry Division, CSIR-Indian Institute of Chemical Technology , Hyderabad 500007 , India.
authors.forename: Uppuluri V
authors.initials: UV
authors.lastname: Mallavadhani
mesh_terms: D002453:Cell Cycle / Q000187:drug effects; D057930:Click Chemistry; D004354:Drug Screening Assays, Antitumor; D005260:Female; D006801:Humans; D008938:Mitosis / Q000187:drug effects; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D053978:Pentacyclic Triterpenes; D014230:Triazoles / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D014315:Triterpenes / Q000032:analysis / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D000094062:Betulinic Acid; D000097245:Ursolic Acid
chemical_list: D053978:Pentacyclic Triterpenes; D014230:Triazoles; D014315:Triterpenes; D000094062:Betulinic Acid; D000097245:Ursolic Acid; C000616456:1-(3'beta-hydroxy-28'-propylcarboxy-urs-12'ene)-4-(3''beta-hydroxy-lup-20''(29'')ene-28''-methylcarboxy)-1,2,3-triazole
keywords: 2D NMR; Click chemistry; Ursolic acid; cytotoxicity; triazoles