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Research Detail

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Mahmud Hasan Rumi
Department of Pharmacy, BRAC University, Dhaka, Bangladesh.

Tahmid Khurshed
Department of Pharmacy, BRAC University, Dhaka, Bangladesh.

Farhan Hasin Arik
Department of Pharmacy, BRAC University, Dhaka, Bangladesh.

Md. Rafayat Hossain
Department of Pharmacy, BRAC University, Dhaka, Bangladesh.

Amina Ferdous Chowdhury
Department of Pharmacy, BRAC University, Dhaka, Bangladesh.

Clotalaria pallida plant extract is used to assess its different biological activities. The extract was made by soaking the dried plant powder in methanol. After comparing with the standard we found that Methanol extract of the sample gave the activity against all the experimented microbes of ZI (zone of inhibition) against E. coli and B. subtillis. After performing the antioxidant, thrombolytic, antidiarrheal, hypoglycemic, and cytotoxic activity assay of methanol extract of sample plant we saw that it has a good biological activity that can be used as a potential traditional medicine.

  Callicarpa americana, Antioxidant, Antimicrobial, Antidiarrheal, Hypoglycemic, Thrombolytic activity
  National Herbarium Bangladesh (NHB), Mirpur, Dhaka
  00-00-2017
  00-00-2017
  Development of Host and Medicinal Plants
  Medicinal Plants

The whole plant has medicinal uses like flowers can be used vegetable, roots are chewed with betel nuts, plants are used to treat the urinary problem, fever, extract of leaves are used to expel intestine worms.

The leaf part of Callicarpa americana plant was collected in May 2017 from the Chittagong hill tract. After collection, the National Herbarium Bangladesh (NHB), Mirpur, and Dhaka authenticated the plant material and provided a plant identification number, which was 47695. At first, the leaves part was washed with fresh water to remove the unwanted dust particles and plant scrap. After that, the cleaned leaves were dried under the sun for a day. Then the leaves were again dried for 1 hour at 30-40°C in a hot air oven. By using a high-capacity grinding machine, the dry and crusty leaves were ground. After that, at a normal ambient temperature (22-25°C) around 900 g of ground powder was soaked in 2.5 L of methanol for a period of 2 days with occasional stirring. With the help of a cotton filter (pore size: 110mm) filtration was done and a rotary evaporator was used at 100 rpm at 30°C to evaporate the maximum amount of solvent. For vaporizing the solvent completely from the extract, the leaf extract was kept under a laminar airflow cabinet. Moreover, it was used to avoid any possibility of microbial growth in the extract while drying. Finally, 22.4 g of plant leaf extract was obtained and kept in a dry and cool place and proper labeling was done. After that, this extract was used to conduct antioxidant, brine shrimp lethality assay, thrombolytic, antidiabetic, antimicrobial, and hypoglycemic studies. The phenols were oxidized by Folin-Ciocalteu in an ionic phenolic solution. When the solution became yellow to dark blue, it is understood that the oxidation has been completed. After that, this color changed mixture was measured at 760 nm in UV spectrophotometer. Finally, the value of the absorbance plotted in the gallic acid calibration curve and data was evaluated as gallic acid equivalents (GAE). In this assay, Artemia salina shrimp was used. Its offspring was hatched in replicated seawater to cultivate nauplii. Here, the calculated amount of dimethyl-sulfoxide (DMSO) was added to the sample, and the desired concentration of the sample was prepared by dilution. The counted nauplii were placed in vials that contained approximately 5 mL simulated seawater with a visual inspection. With the help of a micropipette, various concentrations of samples were added to tubes. Here, vincristine sulfate was used as standard. The sample containing tubes was then placed in a dry place for 24 hours at room temperature. At the last, after 24 hours, the survived nauplii were counted. Percentage (%) of mortality was calculated by using the following equation: Percentage of mortality= (Number of nauplii taken - Number of nauplii alive)/ Number of nauplii taken ×100; 50% of the lethal concentration of extract concentration was calculated from the graph plotted percentage of mortality against concentration. The normal blood flow to the cells and tissues can be hampered due to thrombus as it blocks the blood vessel which can lead to a lack of blood and oxygen. There are some thrombolytic medications like utokinase, clopifogrel, and streptokinase that remove this thrombus, and cells and tissues have remained in normal conditions. For this assay, fresh human blood was collected. Then, they were taken in three different pre-weighed sterile microbes and incubated for 45 minutes at 37°C. The upper fluid was entirely dispensed from all micro- tube lines when the clot has appeared. As standard streptokinase was used and as a negative control distilled, water was used. 100 microliter of plant extract was taken in each tube and incubated for 90 minutes at 37°C. Next, the liquid that was released from the clot was removed and the tubes were weighed again to observe the weight difference when the clot disruption occurred. Percentage of clot lysis was calculated by following equation: (%) of clot lysis = (released clot weighted) / (clot weight after clot disruption) ×100; In recent years, different studies are developing antimicrobial agents to fight antibiotic resistance from different sources and the highest concentration has been given to screen and evaluate the antimicrobial activity. By using the disc diffusion assay method, the antimicrobial activity of Clotalaria pallida was evaluated. E. coli bacteria (gram-negative) and Bacillus Subtilis bacteria (gram positive) were used in this study. Muller Hinton agar (MHA) was used as media in this assay. Firstly, every petri dish was autoclaved for sterilization and 20 ml of MHA was poured in every petri dish. After that, the plates were kept for a time being to be settled. With the help of a cotton swab, the nutrient broth of bacterial strains was incubated in MHA. A small disc of filter paper was made by using a paper punch machine and then different concentrations of plant extract (200 mg/mL and 400 mg/mL) were used to swallow that filter paper. When the discs become dry, they were transferred to the petri dishes and kept in the incubator for 24 hours at 37°C. After 24 hours the zone of inhibition was calculated and for keeping the contamination limited, the whole experiment was done under laminar flow.

 

 

 

 

 

 

  Journal of Medicinal Plants Studies; 2019; 7(4): 118-122
  
Funding Source:
1.   Budget:  
  

A similar protocol for castor oil-induced diarrhea was followed for magnesium sulfate-induced diarrhea. Initially, 24 healthy rats fasted for 18 hours. The rats were divided into four groups that contained 6 rats in each group. Normal saline (0.9% w/v) was given to group I. Loperamide (5 mg/kg) was given to group II and methanol plant extract (200 mg/kg and 400 mg/kg) was given to groups III and IV respectively. After 60 minutes, 1 mL of magnesium sulfate solution was administrated orally and placed in cages lined with adsorbent papers and observed for 4 hours to see the presence of characteristic diarrheal dropping. 100% was

 

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