Evaluation of Antinociceptive and Anti-inflammatory Activity of Phytosterol Present in Chloroform Extract of Phyllanthus Maderaspatensis.

Inflammation and pain is a common cause of medical consultation which generally occurs when a tissue is injured. In recent scenario, attention has been paid for screening new drugs with analgesic activity from plant sources, to reduce or treat pain with less adverse effects than allopathic drugs. The objectives of this research work was to evaluate the antinociceptive and anti-inflammatory activity of phytosterol present in chloroform extract of Phyllanthus maderaspatensis (CEPM) through carrageenan-induced hind paw oedema and hot plate method in male wistar rats. The test groups received CEPM (suspended in 1% caboxymethylcellulose, CMC) at doses 400 mg/kg, p.o.; the reference group received indomethacin (10 mg/ kg, in 1% CMC, p.o.) as positive control and the negative control animals received the vehicle only (1% CMC, 10 mL/kg, p.o.). Oral administration of CEPM or indomethacin showed significant (P<0.001) effect in the reduction of the paw oedema induced by 0.1 mL of 1% carrageenan (in 1% CMC) solution into the subplantar region. CEPM showed the highest inhibition 71.42% at 3rd hr. CEPM extract and pentazocin significantly (P<0.001) increases the basal reaction time when compare to control group. The present study demonstrates the potential anti-inflammatory and analgesic effect of the CEPM which supports the claims by the traditional medicine practitioners.

Ozonation of a mixture of estrogens and progestins in aqueous solution: interpretation of experimental results by computational methods.

The degradation of the mixture of steroid hormones including seven estrogens (17α-estradiol, 17ß-estradiol, 17α-dihydroequilin, 17α-ethinyl estradiol, estriol, estrone and equilin) and five progestins (levonorgestrel, gestodene, trimegestrone, medrogestone and progesterone) by ozonation in aqueous solution is investigated. The ozonation process provides high removal (up to 100%) of hormones and estrogenicity in the treated water. Computational methods such as quantum chemistry calculations (QCCs) are applied to interpret the observed results. Quantum chemistry descriptors computed for steroid hormones explain the nature of the reactions and differences in reactivities between estrogen and progestin hormones within the framework of the Density Functional Theory (DFT). Computed molecular descriptors were combined with physical properties to develop qualitative structure activity relationship (QSAR) models (using multiple linear regression algorithm). The developed models have correlation coefficients (R(2)) of 0.994 for estrogens and 0.997 for progestins, and could be used to predict the removal efficiencies for similar compounds. The frontier molecular orbitals (the HOMO and the LUMO) have a major impact on the reactivity of steroid hormones. The susceptibility of certain functional groups to ozone and possible reactive sites for all steroids was discussed by Frontier Molecular Orbital approach.