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Research Article
 

Cytotoxic and Urease Inhibition Potential of Moringa peregrina Seed Ethanolic Extract



Shaymaa Fadhel Abbas Albaayit and Mehmet Ozaslan
 
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ABSTRACT

Background and Objective: Moringa peregrina have long been used as traditional medicine to treat diseases including fever, ulcer, burns and constipation, antimicrobial and inflammatory throughout the African mainland. The objectives of current study were to evaluate the cytotoxic and urease inhibitory profile of Moringa peregrina seed ethanolic extract (MPSE). Materials and Methods: Brine shrimp lethality bioassay was used to determine the cytotoxic effect of MPSE treatment at concentrations 1000, 100 and 10 μg mL1. Urease inhibition was determined by in vitro Indophenol inhibition assays. Results: It is found that the Moringa peregrina seed ethanolic extract was not cytotoxic at 1000 μg mL1 while significantly active with urease inhibitor (81.30±0.31% at 0.2 mg mL1) with IC50 values of 41.0±0.6 μg mL1. Conclusion: These findings suggested that the Moringa peregrina seed ethanol extract (MPSE) can be utilized to treat and prevent ulcerative and Urolithiasis diseases through urease inhibition process. Seed extract of M. peregrina is a remarkable candidate for further clinical investigation studies to screen out their natural therapeutic potential in ulcerative and urolithiasis diseases.

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Shaymaa Fadhel Abbas Albaayit and Mehmet Ozaslan, 2019. Cytotoxic and Urease Inhibition Potential of Moringa peregrina Seed Ethanolic Extract. International Journal of Pharmacology, 15: 151-155.

DOI: 10.3923/ijp.2019.151.155

URL: https://scialert.net/abstract/?doi=ijp.2019.151.155
 
Received: October 04, 2018; Accepted: November 09, 2018; Published: December 15, 2018


Copyright: © 2019. This is an open access article distributed under the terms of the creative commons attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided the original author and source are credited.

INTRODUCTION

Moringa peregrina (Forssk) Fiori is a widespread plant in Africa and mostly along the countries that bordering the Red Sea. In folk medicine, all parts of this plant are used for the treatment of disinfectant, stomach disorder, wound healing and burns, diabetes, headache, malaria, constipation, muscle pain, hypertension, asthma, fever and burns. It is also administered to pregnant women to facilitate the fetus delivery1-3. The pharmacological studies have been reported the validation of this plant to be used as anti-inflammatory, anti-microbial, anti-ulcer and anti-oxidant. Moringa peregrina seeds oil contains high amounts of oleic acid, linoleic acid, tocopherols, flavonoid and phenolic compounds, which help to reduce microbial infection4-6. Thus, the present work was undertaken to emphasis the cytotoxic and urease inhibition effect of M. peregrina seed extract, which might explore value natural drug for treatment of different disease as prescribed in folk medicine.

Screening of the cytotoxicity of plant extract can be approximated by in vivo Brine shrimp lethality bioassay, which gives information about its safety at a preliminary level7,8.

Urease is an enzyme responsible for control urea hydrolysis in soil and also performs a significant part in the pathogenesis of H. pylori, which involved in many clinical cases such as gastric, hepatic coma and peptic ulcer. Urease is directly engaged with the development of infection induced urolithiasis. Ureases have also contribute in the deactivation of complement, that is an element of host defense mechanism7,9,10. Due to the pivotal role of urease enzyme in H. pylori pathogenesis, many researches had been focused on searching potent natural compounds having urease inhibition activity. Thus, the present work was undertaken to emphasis the cytotoxic and urease inhibition effect of M. peregrina seed extract, which might explore value natural drug for treatment of different disease as prescribed in folk medicine. Therefore, the different fractions of crude extract of M. peregrina seeds were prepared and their urease inhibition activity was examined. Togetherly, cytotoxicity of these fractions were also evaluated through brine shrimp lethality assay. This type of research is the base of drug developing and pharmacognosy.

MATERIALS AND METHODS

Collection and extraction of plant material: Moringa peregrinaseeds were authenticated in 2013 by Dr. Maha Kordofani (Resident Botanist) at the Botany Department, Faculty of Science and University of Khartoum. Fresh seeds were dried in room temperature, powdered and macerated in 1:5 dried plant weights to solvent (ethanol) volume ratio for 3 days. The filtrate was collected and the residues were subjected to further macerate with ethanol. The filtrates were combined and concentrated to dryness under reduced pressure using rotary evaporator at 45-50°C in order to obtain the crude extracts11.

Brine shrimp (Artemia salina) lethality bioassay: In an empty quadrilateral plastic plate which is filled with the artificial seawater (sea salt- 38 g L1 distilled water, pH 7.4), Brine shrimp eggs were hatched. About 50 mg of eggs were sprinkled in the hatching tray (22×32 cm). One side of the hatching tray, where eggs were sprinkled and protect from light, whereas lamp was placed on another side without eggs so that larvae after growth will come out to wards the light partition. Test sample were dissolved (20 mg/2 mL) in methanol and from these solutions were transferred 5, 50 and 500 μL in triplicate such that the concentration would be 10, 100 and 1000 μg mL1, respectively and allowed for drying overnight. About 10 larvas which got matured after 48 h of hatching were placed in each vial by using a Pasteur pipette and these vials were filled with 5 mL sea water. Incubation was done for 24 h at 25-27°C under illumination. By the next day, numbers of live and dead larvae were counted and analysis of data was done from the graph8,12.

Urease inhibition (indophenol inhibition) assay: The in vitro urease inhibition assay was carried out spectrophotometric in 96-well plate. About 25 μL urease enzyme (1 U/well) and 5 μL of test compounds (0.2 μg mL1) were incubated at 30°C for 15 min. After that substrate urea 55 μL (100 mM) was added and re-incubated at 30°C for 15 min. After incubation, 45 μL of phenol (0.005% w/v sodium nitroprusside and 1% w/v phenol) and 70 μL of alkali reagents (0.1% sodium hypochlorite and 0.5% w/v sodium hydroxide) were added. The plate was again incubated for 50 min at 30°C. Urease activity was periodically measured with continuous urea hydrolysis and ammonia production. The rapid change in absorbance (optical density, OD) was monitored at 630 nm on ELISA plate reader (Spectra Max M2, Molecular Devices, CA, (USA)13. Mean±SD had been used to analysis data.

RESULTS

Cytotoxicity: Brine shrimp lethality bioassay was used for cytotoxic evaluation of ethanol extract of the seed of M. perigrena.

Image for - Cytotoxic and Urease Inhibition Potential of Moringa peregrina Seed Ethanolic Extract
Fig. 1:Toxic effects of the M. peregrina ethanol extract after 24 h using brine shrimp lethality bioassay

Table 1:Percentage of urease inhibition of the M. peregrina ethanol extract
Image for - Cytotoxic and Urease Inhibition Potential of Moringa peregrina Seed Ethanolic Extract

The result showed that MPSE extract has no significant effect on cytotoxic activity. In the Fig. 1, data shown that percentage mortality of brine shrimp larvae after treatment with different concentrations 1000, 100 and 10 μg mL1 (3,2 and1 μg mL1 log concentrations) was found to be 30, 10 and 3% respectively. This result indicated that LD50 value of this extract is higher than 1000 μg mL1 indicating the non-cytotoxic nature of MPSE extract even at high.

Urease inhibition assay: In present study, the enzyme inhibition study on the MPSE was carried out against ureases. The ethanol extract of the plant exhibited highest urease inhibition (81.30±0.31%) with IC50 values of 41.0±0.6 μg mL1 at 0.2 mg mL1 as shown in Table 1.

DISCUSSION

The uses of herbal plants as a source of folk medicines in primary health care have become popular globally as a safe drug because of their nature source. Many traditional plants have been shown to possess excellent medicinal properties against various diseases. Moringa species have been widely uses for their nutritional and medical values in many countries. However, M. peregrina seeds have been reported to be widely used in traditional medicine including disinfectant, stomach disorder, wound healing and burns, only a few scientific studies exist on its therapeutic efficacy and mechanism of action1,2,14,15. Brine shrimp lethality bioassay is a rapid and inexpensive assay was used to evaluate cytotoxic activities of any substances16,17. In this study, the acute cytotoxicity assay of MPSE on Brine shrimp showed that plant extract did not possess cytotoxic effect on Brine shrimp since the viability is more than 70% at concentrations 1000 mg mL1, which declared that safe for use as a natural therapeutic against microbial infections.

The significance of urease inhibition assay is because of their large usage in bacterial urease therapy of pathogenic activity of H. pylori alike peptic ulcer and stone emergence and control of urea hydrolysis because of nitrogen loss in urea fertilizer that used in soil18. Based on the urease inhibition assay, results confirmed that administration of M. peregrina seeds is one of the remarkable safety agent for treatment of ulcer related diseases. The traditional use of the genus Moringa perigrena also targeted on disinfectant and stomach disorder1,2,19. Additionally, increasing bacterial resistance, paid attention of the researchers to find other modes of therapy like urease inhibition7. From the outcome of enzyme inhibition studies, it is concluded that MPSE showed enzyme inhibitory activity of 81%. The M. perigrena has been reported to contain high amounts of oleic acid, linoleic acid, tocopherols and phenolic compounds, which are attributed to the enzyme inhibition and antimicrobial properties of extract6,20-23.

The outcome is in agreement with reported by Fahey et al.24, who proved that Moringa tree has an inactivation potencies effect against the secretion of urease. The results of urease inhibition assay of plant, Moringa peregrina authenticate the conventional use for cure of ulcer. These results will lead the scientists to do work on the isolation unique urease inhibitors for increase of the activity.

CONCLUSION AND RECOMMENDATION

The ethanolic extract of M. peregrina seeds was not toxic against brine shrimp eggs (LD50 more than 1 mg mL1), which act as inhibitors of urease enzyme that could normalize the conditions created by bacteria infection. The above cited outcomes signified in this study will advantage forth coming studies of Moringa peregrina seeds as they will be interesting to be used as safe treatment for pathogenic microbial infections like ulcer-related bacteria and inflammation that can cause chronic diseases.

SIGNIFICANCE STATEMENT

This study discover the urease inhibition activity of ethanolic extract of seeds of M. peregrina that can be beneficial for treating Helicobacter pylori infected patient by inhibiting urease enzyme and thus delaying the progression of peptic ulcer. This study will help the researcher to uncover the potent compound inside the seeds, having strong urease inhibition activity which could be novel in structure. Thus this plant can be enlisted in the urease inhibiting capacity plants.

ACKNOWLEDGMENT

The authors are grateful to NAM-ICCBS (International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan) for fellowship award to Shaymaa Fadhel Abaas Albaayit.

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