Title:Molecular Hybrids of N-Phthaloylglycyl Hydrazide and Hydrazinecarbothioamide with Anti-inflammatory and Anti-oxidant Activities
Volume: 16
Issue: 7
Author(s): Ankur Gera*, Chander Mohan, Jitender Madan and Sandeep Arora
Affiliation:
- Chitkara College of Pharmacy, Chitkara University, Chandigarh-Patiala National Highway (NH-64), Punjab 140401,India
Keywords:
Phthalimide, phthaloylglycyl hydrazide, hydrazinecarbothioamide, anti-inflammatory, anti-oxidant, QSAR, molecular docking.
Abstract:
Background: Oxidative stress due to high levels of reactive organic species is the cause of the
progression of inflammation in various diseases. The molecules possessing both anti-inflammatory and antioxidant
activity can be the promising key to treat inflammatory diseases. Phthalimide and hydrazinecarbothioamide
are anti-inflammatory and anti-oxidant pharmacophores.
Objective: Molecular hybrids possessing above two pharmacophores were designed. A series of N-phenyl substituted
2-(2-(1,3-dioxoisoindolin-2-yl)acetyl)-N-phenylhydrazine-1-carbothioamide (CGS compounds) was
synthesized and evaluated for biological activities.
Methods: N-phthaloylglycyl hydrazide was reacted with unsubstituted/substituted phenyl isothiocyanates to
yield CGS compounds. Synthesized compounds were evaluated for in vivo anti-inflammatory activity in carrageenan
rat paw edema model, and in vitro anti-oxidant activity by DPPH assay. Levels of TNF-α and oxidative
stress at the site of inflammation were measured. The genetic algorithm-PLS regression based QSAR
model correlating the effect of N-phenyl substituent on the anti-inflammatory activity was developed. Further,
the interaction of the active compound in the TNF-α binding pocket was studied by in silico docking.
Results: Compound containing the 2-OCH3, 4-NO2 (CGS-5); 4-CF3 (CGS-9); 4-NO2 (CGS-3) showed significant
anti-inflammatory activity (percentage inhibition of paw edema after 3 hour = 58.24, 50.38, 40.05, respectively)
and potent anti-oxidant activity (IC50 =0.045, 0.998, 0.285 μg/ml, respectively). Reduced levels of TNF-
α and increased levels of GSH were observed for the above three compounds. Descriptors for QSAR model
identified by GA-PLS were WPSA1, Weta1unity, WDunity, SC3, VC5, MlogP, and WTPT3. The identified
model was highly predictive, and value of root mean square error of prediction for internal (leave one out) and
external validation was: 1.579, 1.325.
Conclusion: Molecular hybrids of phthalimide and hydrazinecarbothioamide were synthesized. Some of the
compounds possessed promising anti-inflammatory and anti-oxidant activities.