Aims: To investigate the antibacterial activity of ethanolic extract of Terminalia chebula leaf against Bacillus cereus, Sarcina lutea, Staphylococcus aureus, Bacillus subtilis, Salmonella paratyphi, Escherichia coli, Vibrio milieus, Shigella dysenteriae, Shigella boydii, Salmonella typhii in comparison to standard antibiotics azithromycin and ciprofloxacin. Study Design: Extraction of T. chebula leaf, susceptibility tests (zone of inhibition) of extract itself as well as with combination of antibiotics.

Aim: The present study was designed to investigate the antidiabetic & hypolipidemic activity of Calotropis gigantean (Family: Apocynaceae) in alloxan-induced diabetic rat model. Study Design: In vivo study was carried out by ethanolic leaf extract was administered in 250 mg/kg body weight concentration and then subjected to different rats models to authenticate the antidiabetic and hyperlipidimic properties of the plant. Place and Duration of Study: Department of Pharmacy, Southeast University, Banani, Dhaka-1213,Bangladesh within a period of July 2018 to December, 2018. Methodology: Diabetes was induced in rats by an intraperitoneal injection (i.p) of alloxan (100 mg/kg B.W). Ethanolic leaf extract of C. gigantean (250 mg/kg B.W) was administrated orally as a single dose per day to the diabetic rats for 7 days. The negative control group received 0.5 ml of sterile normal saline water orally & positive control group received metformin orally. Synergistic effect of plant was evaluated by combination with 100 mg/kg B.W & 50 mg/kg B.W oral administration of metformin. After 7 days study period, fasting blood glucose, total cholesterol, triglyceride, high-density lipoprotein cholesterol, liver weight & body weight were measured only for diabetic group to observe the effects of diabetes induction. Results: Individual plant extract (250 mg/Kg B.W) & Metformin (100 mg/kg B.W) reduced FBG significantly by 52% (P<0.001) & 55.3% (P<0.001) correspondingly. Metformin (100 mg/kg B.W) potentiated reduction (68%) (P<0.001) when combined to plant extract (250 mg/Kg B.W). Significant dose dependent manner was followed when metformin (50 mg/kg B.W) was combined to plant extract (250 mg/Kg B.W). Our results clearly suggests that C. gigantean exhibit hypoglycemic & hypolipidemic activity with an alteration in body-liver weight. The present study also suggested to develop a combination therapy of extract along with metfromin in different doses to minimize the intake of synthetic drug. Significant reduction of TG, TC were noted by extract (250 mg/kg B.W) with 32.42% (P<0.001) & 41.32% (P<0.001) respectively where standard shown the diminution 43.43% (P<0.05) & 47.21% (P<0.001) respectively as compare to Untreated diabetic rats. 50.21% (P<0.01) & 42.38% (P<0.001) reduction of TG & TC were estimated by C.gigantea extracts (250 mg/kg B.W) when combined with Metformin (100 mg/kg B.W). 34.53% (P<0.05) & 41.54% (P<0.001) reduction of TG & TC by C.gigantea extracts (250 mg/kg B.W) were confirmed when combined to Metformin (50 mg/kg B.W). Combination therapy also has shown synergistic effect in elevation of plasma HDL-cholesterol. Conclusion: The results of the study concluded that C. gigantean have potential antidiabetic and antioxidant properties.

The study's objectives include phytochemical profiling and biological (antioxidant, thrombolytic and cytotoxic) analysis of pure chemicals from Jatropha pandurifolia stem bark ethyl acetate extract. Five different compounds including octacosanyl cis ferulate (1), hexacosyl (E)-ferulate (2) triacontyl ferulate (3), β-sitosterol (4) and stigmasterol (5) are elucidated. Their structures determine through 1HNMR analysis and comparison to published data, while three ferulic acid alkyl esters (1-3) were isolated for the first time from J. pandurifolia. Compounds 1, 2, and 3 all have significant thrombolytic potential with respective values of 68.92% ±1.17 (**P<0.01), 66.56% ±2.35 (**P<0.01) and 70.81%±0.98 (**P<0.01) with comparison to standard streptokinase (73.6%±0.76). When compared to BHT (6.82± 0.99 μg/ml) the IC50 (DPPH assay) values were 16.26±1.07 (**P<0.01), 14.12±1.23 (**P<0.01), and 13.16±1.70 μg/ml (**P<0.01). Comparing the three compounds to the reference vincristine sulphate (LC50: 0.52±0.18 μg/ml), of compound 1 (1.56±0.35 μg/ml) (**P<0.01), compound 2 (1.3±0.78 μg/ml) (**P<0.01) and compound 3 (1.29±0.33 μg/ml) (**P<0.01). The results can therefore be interpreted as a concept of isolated molecules having potential for application in additional pharmaceutical research.

Alstonia scholaris (L.) R.Br. is a medicinal herb belonging to the family Apocyanaceae. Locally it is known as Chatim and abundant with ethno-medicinal properties. The crude ethanolic extract of A. scholaris leaves along with its n-hexane, ethyl acetate, dichloromethane and aqueous soluble partitionates were assayed for their probable thrombolytic and membrane stabilizing activities. The activities of the leaf extract were compared to standard drugs, streptokinase for thrombolytic and acetyl salicylic acid for membrane stabilizing activities. In this study, among all extractives the highest thrombolytic activity was exhibited by the crude ethanolic extract (55.33±0.08%) (p < 0.001) as compared to Streptokinase (62.07±0.33%) (p < 0.001). Alternatively, ethanol soluble materials also significantly inhibited the haemolysis of human erythrocyte membrane both in induced by hypotonic solution (83.47±0.15%) (p < 0.001) and by heat (79.82±0.71%) (p < 0.001), respectively as compared to standard acetyl salicylic acid (85.09±0.8%) (p < 0.001) and (80.98±1.34%) (p < 0.001).Bangladesh Pharmaceutical Journal 21(2): 145-149, 2018

The study attempted to illustrate the antioxidant, thrombolytic and cytotoxic properties of two different medicinal plants, Jatropha pandurifolia and Syzygium reticulatum. In vitro antioxidative activity was tested through qualitative and quantitative DPPH scavenging assay which revealed the radical scavenging activity. Methanolic stem bark extract of Jatropha pandurifolia (MSJP) and ethyl acetate leaf extract of Syzygium reticulatum (EALSR) showed moderate clot rupture activity, the value of which were 61.30 ± 2.35% (**P<0.01) and 63.81 ± 1.92% (**P<0.01) accordingly, whereas streptokinase showed 73.6 ± 0.76% clot lysis capability. IC50 value was 6.82 ± 0.99 μg/mL for butylated hydroxy toluene (BHT) wherein MSJP and EALSR showed 8.1± 1.44 (***P<0.001); and 10.34±2.12 (**P<0.01) μg/mL accordingly. In Brine shrimp cytotoxicity, MSJP, EALSR and vincristine sulphate exhibited mild activity with LC50, the value of which were 5.73±2.85 (*P<0.05), 5.12±1.57 (*P<0.05) and 0.52 ± 0.18 μg/mL respectively. The results proved the presence of many bioactive compounds showing thrombolytic, antioxidative and cytotoxic activities. Dhaka Univ. J. Pharm. Sci. 22(1): 97-103, 2023 (June)