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Design, Synthesis, and in vitro and in vivo Evaluations of ( Z )‐3,4,5‐Trimethoxystyrylbenzenesulfonamides/sulfonates as Highly Potent Tubulin Polymerization Inhibitors
Author(s) -
Mahesh Rasala,
Nayak Vadithe Lakshma,
Babu Korrapati Suresh,
Riyaz Syed,
Shaik Thokhir Basha,
Kumar Gajjela Bharth,
Mallipeddi Prema Latha,
Reddy Challa Ratna,
Shekar Kunta Chandra,
Jose Jedy,
Nagesh Narayana,
Kamal Ahmed
Publication year - 2017
Publication title -
chemmedchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.817
H-Index - 100
eISSN - 1860-7187
pISSN - 1860-7179
DOI - 10.1002/cmdc.201600643
Subject(s) - hela , cytotoxicity , in vivo , tubulin , chemistry , in vitro , docking (animal) , drug discovery , microtubule , cell culture , stereochemistry , combinatorial chemistry , biochemistry , biology , microbiology and biotechnology , medicine , genetics , nursing
Newer therapeutics can be developed in drug discovery by adopting the strategy of scaffold hopping of the privileged scaffolds from known bioactive compounds. This strategy has been widely employed in drug‐discovery processes. Structure‐based docking studies illustrate the basic underlying concepts and reveal that interactions of the sulfonamide group and hydrophobic interactions are crucial. On the basis of this strategy, over 60 synthetic analogues were synthesized and evaluated for their cytotoxicity against the NCI panel of 60 human cancer cell lines; the majority of these compounds exhibited promising cytotoxicity with GI 50 values ranging between 18 and 50 n m . Among these compounds, ( Z )‐ N ‐[2,3‐dimethoxy‐5‐(3,4,5‐trimethoxystyryl)phenyl]‐4‐methoxybenzenesulfonamide ( 7 a ) and ( Z )‐ N ‐[2‐hydroxy‐3‐methoxy‐6‐(3,4,5‐trimethoxystyryl)phenyl]‐4‐methoxybenzenesulfonamide ( 9 a ) were found to be potent. Similar results were obtained against three human cancer cell lines with IC 50 values ranging between 0.04 and 3.0 μ m . Studies aimed at elucidating the mechanism of action of these new analogues revealed that they inhibited the in vitro polymerization of tubulin and disorganized the assembly of microtubules in HeLa and MCF‐7cancer cells. Lead compounds 7 a and 9 a displayed notable in vivo antitumor activity in a HeLa tumor xenograft model. Our studies have resulted in the identification of a scaffold that can target tubulin polymerization, which should have significant potential toward the development of new antitumor drugs.