Posted by admin on Dec 1, 2014 in |
Marine organisms are potentially prolific sources of highly bioactive secondary metabolites that might represent useful leads in the development of new pharmaceutical agents. The Libyan marine biodiversity including macroalgae remains partially unexplored in term of their potential bioactivities. Method: The phytochemical analysis of the alcoholic extracts of some commonly occurring seaweed Cystoseira compressa, Enteromorpha intestinals, Corallina and Ulva lactuca and their evaluated for antibacterial activity by well diffusion assay were studied. Four different solvents namely water, ethanol 99 %, methanol 99 %, and methylated spirit 95 % were used for extraction. Results: The phytochemical analysis revealed the presence of Carbohydrates, Steroids, Tannin & Phenols, Saponins, Proteins, and glycosides. The extracts were subjected for study of antibacterial activity. The zone of inhibition ranged between 8 to 16 mm in aqueous extract and up to 16 mm in methanol extract. The maximum activity (16 mm) was recorded from methanol extract of Ulva lactuca against Staphylococcus aureus and, minimum activity (8mm) recorded by Cystoseira compressa against Staphylococcus...
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Posted by admin on Dec 1, 2014 in |
Objectives: To evaluate the antidepressant activity of fresh leaves of Tinospora cordifolia in albino mice. Materials and Methods: Swiss albino mice weighing 25-30grams of either sex were selected for the study. Six animals were allocated to each experimental group. Animals were divided into 4 groups of 6 mice each. Group 1 – Control group treated with normal saline (0.1ml/10gm), Group 2 received standard group treated with 15mg/kg of imipramine, Group 3 – T1 treated with Tinospora cordifolia fresh leaves (100 mg/kg) and Group 4 – T2 treated with Tinospora cordifolia fresh leaves 50 mg/kg and 10 mg/kg of imipramine. Decrease in total immobility period denoted antidepressant activity in both tail suspension method & forced swim test in albino mice. Results: The test drug that is 50mg/kgp.o of Tinospora cordifolia fresh leaves along with 10mg/kg p.o of imipramine significantly decreased the total immobility period in both forced swim test and tail suspension method in albino mice. In forced swim test the percentage decrease in the immobility period was 38.68% when...
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Posted by admin on Dec 1, 2014 in |
Quorum sensing is a bacterial cell communication mechanism mediated through signal molecules such as AHL’s. Many opportunistic pathogens use these quorum sensing circuits to coordinate their virulence gene expression. Wide range of naturally occurring substances particularly plant extracts have been evaluated for their ability to modulate quorum sensing in Gram-negative bacteria. Preliminary screening of popular food spices for QSI activity revealed that Cinnamomum verum (Dalchini) had good QSI activity. Recognizing its medicinal value and dietary consumption, an attempt was made to evaluate QSI activity of Cinnamomum verum on bacterial pathogens like Pseudomonas and Serratia and confirmed by using bioindicator organism Chromobacterium violaceum. Cinnamomum verum extract had more QSI activity than the antibacterial activity in Serratia. In Pseudomonas, the antibacterial activity was more while QSI activity was comparatively less. Interestingly spice extract could reduce swarming nature in both the organisms, which is one of the important virulent factor regulated by QS. The phytochemical components in the crude extract were analyzed by qualitative methods. MS analysis of the treated samples revealed...
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Posted by admin on Dec 1, 2014 in |
A HPLC method has been described for simultaneous determination of Chlorpheniramine Maleate, Phenylpropanolamine Hydrochloride and Paracetamol in formulation. This method is based on HPLC separation of the three drugs on the Thermo Hypersil Gold C18 column(250mm ×4.6mm, 5.0µ), with isocratic conditions and mobile phase containing methanol: 0.01M disodium hydrogen phosphate dihydrate buffer pH 7 adjusted with Ortho Phosphoric Acid (OPA) (60: 40) at a flow rate of 1mL/min using UV detection at 217 nm. This method has been applied to formulation without interference of excipients of formulation. The linear regression analysis data for the calibration plots showed a good linear relationship over the concentration range of 0.5-3µg/mL for Chlorpheniramine Maleate, 7-12µg/mL for Phenylpropanolamine hydrochloride, and 0.4-1.4µg/mL for Paracetamol, respectively. The mean values of the correlation coefficient, slope and intercept were 0.999 ± 1.72, 28455 ± 1.01, 26185 ± 1.28 for Chlorpheniramine Maleate, 0.999 ± 0.34, 23604 ± 1.16, 73758 ± 1.49 for Phenylpropanolamine hydrochloride and 0.999 ± 0.80, 51233 ± 1.89, 5560 ± 1.62 for Paracetamol respectively. The method...
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Posted by admin on Dec 1, 2014 in |
Various parts of Lasia spinosa (Linn.) are widely used in North East region to manage wide range of disease but so for no scientific study was done to find out its pharmacological properties which may support its use in traditional medicine. Bioactive fraction (ethyl acetate fraction, LSE) from the methanol – water (80:20) extract of Lasia spinosa rhizome was evaluated for gastroprotective and antioxidant activity. In the safety evaluation, LD50 was found to be more than 2000 mg/kg. High performance thin layer chromatography (HPTLC) finger printing of the total extract was also carried out using gallic acid as markers in an attempt to characterize the constituents responsible for the activities and also to standardize the extract. The bioactive fraction from Lasia spinosa rhizome (LSE; 50 and 100 mg/kg body weight) was administered orally, twice daily for 5 days for prevention from Ethanol (EtOH)-, cold-restraint stress (CRS) – and pylorus ligation (PL)-induced ulcers. Estimation of antioxidant enzymes activity was carried out in CRS-induced ulcer model. LSE showed dose-dependent ulcer protective...
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