Design, synthesis of 2,3-disubstitued 4(3H)-quinazolinone derivatives as anti-inflammatory and analgesic agents: COX-1/2 inhibitory activities and molecular docking studies.

A new series, 2-substituted mercapto-3-[2-(pyridin-2-yl)ethyl]-4(3H)-quinazolinone 1-21, was synthesized and evaluated for in vivo anti-inflammatory and analgesic activities and in vitro COX-1/COX-2 inhibition. Compounds 1, 4, 5, 6, 8, 10, 13, 14, 15, 16, and 17 exhibited potent anti-inflammatory and analgesic properties, with ED50 values of 50.3-112.

Synthesis, anti-inflammatory, analgesic, COX-1/2 inhibition activities and molecular docking study of pyrazoline derivatives.

Design, synthesis and pharmacological activities of a group of 1,3,5-trisubstituted pyrazolines were reported. The chemical structures of the synthesized compounds have been assigned on the basis of IR, MS, (1)H NMR, and (13)C NMR spectral analyses. The synthesized 1,3,5-trisubstituted pyrazoline derivatives were evaluated in vivo for anti-inflammatory, analgesic activities and in vitro for COX-1/2 inhibition assay.

Synthesis, anti-inflammatory, analgesic and COX-1/2 inhibition activities of anilides based on 5,5-diphenylimidazolidine-2,4-dione scaffold: Molecular docking studies.

The design, synthesis and pharmacological activities of a group of 5,5-diphenylimidazolidine-2,4-dione bearing anilide, phenacyl and benzylidene fragments 2-27 were reported. The prepared 5,5-diphenylimidazolidine-2,4-dione derivatives were evaluated in vivo for anti-inflammatory, analgesic activities and in vitro for COX-1/2 inhibition assay. Among the tested compounds, derivatives 5, 9, 10, 13, and 14 showed significant and potent anti-inflammatory and analgesic activities almost equivalent to reference drug celecoxib.

Molecular mechanisms that underlie the sexual stimulant actions of Avicennia marina (Forssk.) Vierh. and Crocus sativus L.

The effects of extracts and sub-fractions of Avicennia marina, Crocus sativus and sildenafil on the sexual behavior of male rats and their effects on the intracavernosal pressure (I.CV), intracavernosal cyclic GMP and dihydrotestosterone plasma level were examined. The sexual behavior was followed for four hours using infra-red video cameras to quantify the effects on various male sexual behaviors.

Structure-based design of phthalimide derivatives as potential cyclooxygenase-2 (COX-2) inhibitors: anti-inflammatory and analgesic activities.

A group of 30 cyclic imides (1-10a-c) was designed for evaluation as a selective COX-2 inhibitor and investigated in vivo for anti-inflammatory and analgesic activities. Compounds 6a, 6b, 7a and 7b exhibit optimal COX-2 inhibitory potency (IC50 = 0.18, 0.

Synthesis of N-benzenesulfonamide-1H-pyrazoles bearing arylsulfonyl moiety: novel celecoxib analogs as potent anti-inflammatory agents.

The reaction of arylsulfones 11a-d with hydrazonoyl chloride derivative 13 furnished celecoxib analogs 4-(3-acetyl-5-aryl-4-(arylsulfonyl)-1H-pyrazol-1-yl)benzenesulfonamides 15a-d, respectively. Oximes 16a, b and hydrazones 17a, b were prepared by reacting sulfones 11a, b with hydroxyl amine and phenyl hydrazine, respectively. The anti-inflammatory activity of the synthesized compounds showed that, 5-(4-bromophenyl)-4-(phenylsulfonyl)pyrazole 15c and 5-(4-bromophenyl)-4-(4-tolylsulfonyl)pyrazole 15d exhibited excellent anti-inflammatory activity with ED50 = 68 ± 2.

Citrus medica "Otroj": attenuates oxidative stress and cardiac dysrhythmia in isoproterenol-induced cardiomyopathy in rats.

Citrus medica L. commonly known as Otroj, is an important medicinal plant reputed for its nutritious and therapeutic uses. The present work was undertaken to investigate the protective effect of the ethanolic extract of otroj (EEOT) against isoproterenol (ISO)-induced cardiotoxicity in rats.

Studies on tracheorelaxant and anti-inflammatory activities of rhizomes of Polygonatum verticillatum.

Background: The present study describes the tracheorelaxant and anti-inflammatory effects of Polygonatum verticillatum which may support its medicinal use in hyperactive airway complaints and inflammatory disorders.

Methods: The tracheorelaxant activity of crude extract of the rhizomes of P. verticillatum (PR) was assessed in isolated guinea-pig tracheal tissues immersed in tissue organ bath filled with Tyrode's solution and a continuous supply of carbogen gas (95% O2 and 5% CO2).

Molecular design, synthesis and biological evaluation of cyclic imides bearing benzenesulfonamide fragment as potential COX-2 inhibitors. Part 2.

A group of cyclic imides (1-10) was designed for evaluation as a selective COX-2 inhibitors and investigated in vivo for their anti-inflammatory activity. Compounds 6a, 6b, 8a, 8b, 9a, 9b, 10a and 10b were proved to be potent COX-2 inhibitors with IC50 range of 0.1-4.

Synthesis and in-silico studies of some diaryltriazole derivatives as potential cyclooxygenase inhibitors.

The synthesis of several 4-phenyl-5-pyridin-4-yl-2,3-dihydro-3H-1,2,4-triazole-3-thiones possessing N-2 Mannich bases or S-alkyl substituents, is reported. Several of them exhibited a low nanomolar COX enzyme inhibition activity. Most of the compounds showed inhibition of edema was similar to that evoked by celocoxib in animal model.

New flavane gallates isolated from the leaves of Plicosepalus curviflorus and their hypoglycemic activity.

Two new flavane gallates were isolated from the leaves of Plicosepalus curviflorus. The structure of the new compounds was established as 2S,3R-3,3',4',5,7-pentahydroxyflavane-5-O-gallate (1) and 2S,3R-3,3',4',5,5',7-hexahydroxyflavane-4',5-di-O-gallate (2), respectively. In addition, seven known compounds (-)-catechin (3), quercetin (4), lupeol (5), β-sitosterol (6), pomolic acid (7), β-sitosterol 3-O-β-d-glucopyranoside (8) and 4-methoxycinnamic acid (9) were reported for the first time from the genus Plicosepalus.

Synthesis, biological evaluation and molecular modeling study of pyrazole and pyrazoline derivatives as selective COX-2 inhibitors and anti-inflammatory agents. Part 2.

New pyrazole and pyrazoline derivatives have been synthesized and their ability to inhibit ovine COX-1/COX-2 isozymes was evaluated using in vitro cyclooxygenase (COX) inhibition assay. Among the tested compounds, N-((5-(4-chlorophenyl)-1-phenyl-3-(trifluoromethyl)-1H-pyrazol-4-yl)methylene)-3,5-bis(trifluoromethyl)aniline 8d exhibit optimal COX-2 inhibitory potency (IC(50)=0.26 lM) and selectivity (SI)=>192.

Synthesis, anti-inflammatory activity and COX-1/COX-2 inhibition of novel substituted cyclic imides. Part 1: Molecular docking study.

A group of cyclic imides (1-13) was designed for evaluation as selective COX-2 inhibitors and investigated in vivo for their anti-inflammatory activities using carrageenan-induced rat paw edema model. Compounds 5b, 6b, 11b, 11c, 12b and 12c were proved to be potent COX-2 inhibitors with IC50 range of 0.1-1.

Synthesis, analgesic and anti-inflammatory evaluation of some novel quinazoline derivatives.

Two series of some new 2,4,6-trisubstituted-quinazoline derivatives were prepared and screened for their analgesic, anti-inflammatory activity and acute toxicity. Four compounds were more potent analgesic agents than the reference drug Indomethacin and thirteen compounds showed significant anti-inflammatory activity. Seven compounds showed combined ability to inhibit both pain and inflammation.

Drug-induced pulmonary fibrosis.

Pulmonary fibrosis is characterized by the accumulation of excessive connective tissue in the lungs. Its causes include chronic administration of some drugs for example bleomycin, cyclophosphamide, amiodarone, procainamide, penicillamine, gold and nitrofurantoin; exposure to certain environmental factors such as gases, asbestos and silica and bacterial or fungal infections. Some systemic diseases also predispose to the disease for example rheumatoid arthritis and systemic lupus erythematosus.