PHYTOCHEMICALS AND TERATOGENIC EFFECTS OF WATER EXTRACTS OF RIND OF SELECT FRUITS
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IJBPAS, May, 2018, 7(5): 938-952 ISSN: 2277–4998 PHYTOCHEMICALS AND TERATOGENIC EFFECTS OF WATER EXTRACTS OF RIND OF SELECT FRUITS ROBERT I. PALAMBERGO, RICH MILTON R. DULAY AND EDEN S. DAVID* Department of Biological Sciences, College of Arts and Sciences, Central Luzon State University, Science City of Munoz, Nueva Ecija, Philippines *Corresponding Author, E-mail: eusdavid@yahoo.com Received 20 Jan. 2018; Revised 24th Feb. 2018; Accepted 23rd March 2018; Available online 1st May 2018 th DOI: https://doi.org/10.31032/IJBPAS/2018/7.5.4452 ABSTRACT This paper reported the phytochemicals and teratogenic activities of fruit rind extracts of Annona muricata, Annona squamosa, and Garcinia mangostana. Zebrafish (Danio rerio) embryos at segmentation phase were exposed to various concentrations of the three extracts. Mortality, heartbeat rate, hatchability, delayed growth and malformations of zebrafish were determined. Phytochemical screening revealed that tannins, saponins, flavonoids, terpenoids, and cardiac glycosides were present in A. squamosa, and A. muricata. However, only flavonoid was not detected in G. mangostana. The toxic effects of the extracts were found dependent on the time of exposure, and concentrations of extracts. The most common toxic effect of the three extracts was coagulation. No heartbeat rate was observed to embryos in 1% and higher concentrations of extracts of A. muricata and G. mangostana and 0.5% and higher concentrations of A. squamosa extract. The 0.1% of A. muricata extract-treated embryos had 33.33% hatchability, while no hatched was recorded in those exposed to all concentrations of extracts of A. squamosa and G. mangostana. Embryos showed 100% delayed growth when exposed in 0.5% of both A. muricata and A. squamosa extracts, and in 0.1% of G. mangostana extract. Bent-tail tip embryos were the most common abnormalities and were observed at 0.1% of both extracts of A. muricata and A. 938 IJBPAS, May, 2018, 7(5)
Robert I. Palambergo et al Research Article squamosa. Altogether, rind extracts of the three fruits contain bioactive compounds and exhibit embryo-toxic and teratogenic effects in developing embryos of zebrafish. Keywords: Annona muricata, Annona squamosa, Garcinia mangostana, zebrafish, phytochemicals INTRODUCTION Plant-based medicine as valuable remedy for purgative. Its fruit peel extract contains several diseases has been used over the past alkaloids, flavonoids, phenols, saponins, years. Plants contain various phytochemicals steroids, terpenoids, coumarin [3], and such as alkaloids, tannins, flavonoids, acetogenins [4]. Annona muricata Lin., on terpenes, saponins, coumarins, glycosides, the other hand, is commonly known as phenolics, essentials oils and others which guyabano in the Philippines. The fruit is used essentially contribute to their biological to treat dysentery, mouth sores, fever, and effects. Phytochemicals have shown an diabetes. It contains alkaloids, flavonoids, important role in preventing chronic diseases carbohydrates, glycosides, saponin, like cancer, diabetes, and coronary heart terpenoids, and protein [5]. With the disease [1]. Therefore, many plant based important compositions and significant products have been developed and available biological activities of the three medicinal not only in the local but also in the plants, their toxic and teratogenic effects, if international market. any, have not yet been studied, hence, this Garcinia mangostana Lin., commonly study. known as mangosteen, is a fruit-bearing tree Zebrafish (Danio rerio), a member of that is cultivated in Philippines. It is used to Cyprinidae family, is being used in treat fever, skin disease, diarrhea, diabetes, toxicological and teratological studies stomach ache and intestinal ailments. It is primarily due to their various advantages also reported to contain a variety of such as transparency of embryo, high secondary metabolites, such as oxygenated fecundity, easy to handle, and inexpensive to and prenylated xanthones [2]. Annona raise. Teratogens are substances that may squamosa Lin., commonly called as atis by cause defects in normal embryonic many Filipinos, was already a part of human development but not necessarily being toxic diet due to its nutritional and medicinal in adults [6]. Some teratogens such as values. In folkloric medicine, the unripe fruit thalidomide [7] and arsenic [8] are presently is used as astringent, and the root is a drastic used as anticancer drug. 939 IJBPAS, May, 2018, 7(5)
Robert I. Palambergo et al Research Article Herein, we investigated the phytochemical placed into a double boiler water bath at 80 compositions and the toxic and teratogenic to 90°C for 2 hours. Extracts were filtered effects of the hot water extracts of fruit rinds using a Whatman filter paper No. 2 and the of select medicinal plants in developing filtrates were diluted to embryo water [12] to embryos of D. rerio. prepare 10 ml of the different concentrations MATERIALS AND METHODS (3%, 2%, 1%, 0.5%, 0.1%,and 0%, control) Source of Plant Materials which served as treatments. The ripe fruits of A. squamosa, A. muricata, Maintenance and Acclimatization of and G. mangostana were purchased from Zebrafish Science City of Munoz, Nueva Ecija, An aquarium comprising of untreated and Philippines. The ripe fruits were washed and clean water with continuous aeration at peeled off, then the fruit rinds were cut into 26±1°C was maintained for female and male small pieces and air-dried for 5 days. The adult zebrafish at a ratio1:2, respectively. dried fruits were pulverized using blender Fish were then acclimatized for one week and their powders were subjected to before spawning and fertilization. They were extraction. nourished daily with a high protein diet Phytochemical Screening flakes. The high quality of water was The bioactive components of each fruit rind maintained. were determined based on the chemical test Zebrafish Spawning and Fertilization described by Sofowora [9], Trease and Evans Zebrafish were confined in a plastic mesh to [10], and Harborne [11]. Three replicates prevent cannibalism. After which, the were prepared in each test. The results were zebrafish were subjected in dark condition by determined based on color and intensity of wrapping the aquarium with black plastic bag the action and were noted as present or not to allow spawning. After 12 hours in the dark detected. condition, the aquarium was exposed to light Hot Water Extraction condition for another 12 hours. Fertilization The plant materials were separately extracted occurs 30 min after the light was turned on. through hot water extraction protocol. In Twelve hour post fertilized embryos were each fruit rind, 300 ml of distilled water was siphoned out from the aquarium using a hose added to 10 grams of powdered fruit rind in a and transferred in a beaker. Embryos were 1000 ml capacity flask. The mixtures were rinsed three times with distilled water and 940 IJBPAS, May, 2018, 7(5)
Robert I. Palambergo et al Research Article placed in a Petri plate to check the uniformity (DMRT) was carried out to compare the and normal conditions of embryos using a treatment effects at 5% level of significance. compound microscope. Unfertilized or RESULTS AND DISCUSSION coagulated eggs were not considered. Phytochemical Constituents of Fruit Rinds Teratogenicity and Toxicity Assay A number of phytochemicals are present in Two ml of each treatment concentration of plants. In this study, five phytochemicals the extract was dispensed into each well of were screened using qualitative analysis in the 12-well ELISA plate. Triplicate was the three samples and the results are prepared each treatment concentration. Four presented in Table 1. Apparently, all embryos at segmentation phase were phytochemicals screened were present in A. transferred into each well containing the squamosa, and A. muricata. However, different treatments. The plate was incubated flavonoid was not detected in G. at 26°C±1°C. Mortality, heartbeat, and mangostana. These phytochemicals are hatchability rates were recorded. responsible to several biological activities. Teratogenic activity was examined under These qualitative results of A. muricata, A. 40X magnification using a compound squamosa and G. mangostana extracts were microscope. Morphological endpoint correspond to findings from previous evaluation of treated zebrafish was based on reported studies. Ethanol extract of pericarp the parameters established by Schulte and of A. muricata showed the presence of Nagel [13] and Nagel [14]: lethal saponins, terpenoid, tannins, flavonoids, and (coagulation, tail not detached, no somites, cardiac glycosides [15]. Using petroleum and no heartbeat), teratogenic (malformation ether, ethyl acetate, and alcohol extraction, A. of head and tail, scoliosis, growth retardation, squamosa detected almost all the stunted tail, and limited movement), and phytochemicals screened [16]. However, in normal. Percentage delayed growth and the study of Kaladhar et al. [3], the pericarp malformation were determined. of A. squamosa showed positive result of Statistical Analysis terpenoid. Moreover, the pericarp of G. Experiment was laid out in a Completely mangostana also contains some Randomized Design (CRD). Data were phytochemicals. The chloroform extract of analyzed using analysis of variance the pericarp showed positive results of (ANOVA). Duncan’s Multiple Range Test terpenoids and flavonoids [17]. However, 941 IJBPAS, May, 2018, 7(5)
Robert I. Palambergo et al Research Article saponins and tannins were not detected in the gymnemagenol from Gymnema sylvestre extract. In the study of Alvarez et al. [18], the exhibited cytotoxic activity (73%) on HeLa methanol extract of the pericarp showed cells after 96 hours [24]. Saponins also positive result of tannins and cardiac possessed significant antimicrobial and glycoside. However, some phytochemicals antifungal activities against pathogenic including flavonoid was detected in bacteria and fungi [25]. There were some chloroform extracts but not in aqueous studies exhibiting the activities of saponin in extract. These differences are due to the medicinal applications such as solvent used in the extraction of bioactive anticardiovascular [26], and anti- components. inflammatory activities [27]. They can also Tannins are bioactive compounds that are interfere the replication of cellular DNA and naturally present in plant. This bioactive prevent the proliferation of cancer cells [28]. compound was detected in the three extracts Another bioactive compound present in as indicated by brownish green or blue plants is flavonoid and its presence in plant coloration. This compound is widely extracts can be distinguished by yellow distributed in higher plants and members of coloration. This coloration was observed in polyphenol chemical family. This suggests A. muricata and A. squamosa. This naturally that the presence of tannins in the extracts is occurring compound possesses several tend to be acidic because of the phenolic biological activities such as anti- groups and could possibly be responsible for inflammatory, antimicrobial, anticancer, high its antimicrobial activity [19]. Tannins could antioxidant, and anti-tumor activities [29, 30, inhibit the growth of fungi, yeast, bacteria, 31, 32, 33]. and viruses [20] and has anti-cancer activity The terpenoid is also present in the three [21, 22]. extracts and is considered as one of many The three extracts showed the presence of secondary metabolites. This bioactive saponins through formation of emulsion or compound was detected in the three plant stable frothing. This is due to the mixture of extracts by exhibiting a color of reddish the non-polar sapogenin and the water- brown.Terpenoids exhibited potential use in soluble side chain compound producing pharmacological activities such as antiviral, visible foam [23]. Saponins have shown antibacterial, antimalarial, anti-inflammatory, biological activities. The isolated saponin, 942 IJBPAS, May, 2018, 7(5)
Robert I. Palambergo et al Research Article inhibition of cholesterol synthesis, and anti- different concentrations of A. muricata, A. cancer activities [20]. squamosa, and G. mangostana fruit rinds hot The last bioactive compound that was water extract. The toxic effects of the screened is the cardiac glycoside and this was extracts were found dependent on the time of detected in all extracts. The brown ring exposure and concentrations of extracts. The formation indicates the presence of cardiac most common toxic effect of the three glycosides.This bioactive compound has extracts was coagulation (Figure 1 ACE). been used in therapy for many years in heart After 12 hours of exposure, 100% mortality failure [34]. Moreover, cardiac glycosides was observed in 2% and higher concentration can inhibit cell proliferation and has of A. muricata and G. mangostana. However, cytotoxic activity by inducting apoptosis although lower than 100% mortality, [35]. Therefore, the presence of bioactive embryos exposed in 2% of A. squamosa compounds in the plants indicates their showed statistically comparable with 3%. medicinal values. These findings support the Apparently, the mortality of embryos had traditional use of the plants in the increased as the time of exposure prolonged management of diseases because of their and this evidently observed to embryos at 1% varied pharmacological effects. concentration of all extracts. At 48 hours post Toxic Effects of Fruit Rind Extracts treatment exposure, a 100% mortality was This study evaluated the toxic and observed in embryos exposed to 0.50% and teratogenic effects of the three fruit rind higher concentrations of both A. muricata extracts in zebrafish embryos as animal and A. squamosa and to those at 1.0% and model. The embryos were exposed in various higher concentrations of G. mangostana. In treatment concentrations and observed at contrast, no mortality was observed to those different stages of development from treated 0.10% of all extracts. segmentation phase (12 hours), pharyngula It is clearly seen that all extracts at 0.5% and stage (24-36 hours), and hatching period (48- higher concentrations significantly affect the 72 hours). To determine the toxic effects, survival of D. rerio embryos. Coagulation coagulation and absence of heartbeat were was the most observed lethal effects on notably observed in treated embryos. Table 2 embryos of the three plant extracts. These presents the percentage mortality of embryos toxic effects of plant extracts can be after 12, 24, 36, and 48 hours of exposure at attributed to their bioactive component 943 IJBPAS, May, 2018, 7(5)
Robert I. Palambergo et al Research Article detected in phytochemical screening. These of A. squamosa exhibited cytotoxic effect compounds have major impact on the against in vitro bel-7402 and CNE2 human embryos causing death as early as 12 hours tumor cell lines [39]. The panaxanthone and prolonged time of exposure to the isolated from the pericarp of G. mangostana extracts. For instance, Wahyuni [36] reported suppressed the tumor volumes treated with that the compound saponins can disturb the panaxanthone and also significantly lower development of Aedes egypti by causing the metastasis of a mouse model [40]. retardation of development and weight Moreover, the xanthone of G. mangostana reduction. Increasing of mortality level of the which reported previously to have anti- larvae was also attributed by this compound proliferating effect on cancer cells was that can cause hemolysis in the blood vessels evaluated its toxic effects in D. rerio. The causing death of the larvae. Joy and Remani embryos were dead at 250 μg/mL and 125 [37] isolated new compound from pericarp of μg/mL after 48 hours of incubation. Thus A. squamosa as (-)–ent-kaur-16-en-19-oic embryos at 62.5 μg/mL and higher acid and 16a,17-dihydroxy-ent-kauran-19-oic concentrations were considered toxic and acid showed cytotoxicity against different lethal to embryo. However, no malformation cell lines (He La cervical cancer cell, DLA was observed to all the embryos survived cells). However, the root of A. muricata [41]. Some plants such as Artocarpus demonstrated high cytotoxic effect against heterophyllus and Tinospora cordifolia also HL-60 cells by disrupting the mitochondrial demonstrated toxic effects in D. rerio membrane to arrest the G0/G1 phase and embryos [42, 43]. inhibit cell proliferation at different Heartbeat Rate of Zebrafish concentrations after 24 hours of treatment Heartbeat is an important parameter to [38]. Similarly, this activity of A. muricata determine the viability of developing D. rerio was also observed in embryos of D. rerio by embryos. The normal heartbeat rate of D. demonstrating growth retardation as the time rerio embryos ranges from 120-180 per of exposure prolonged. Acetogenins is minute [44]. The heartbeat rates of all another compound abundant among embryos at pharyngula stage were monitored Annonaceae family. This has been reported and the results are presented in Table 3. to possess anticancer properties. The Apparently, no heartbeat rate was observed acetogenin, squamostolide isolated from seed to embryos in 1% and higher concentrations 944 IJBPAS, May, 2018, 7(5)
Robert I. Palambergo et al Research Article of extracts of A. muricata and G. mangostana than that of the control embryos. No hatched and 0.5% and higher concentrations of A. was recorded in those exposed to all squamosa extract due to coagulation at early concentrations of extracts of A. squamosa stage of embryonic development. The zero and G. mangostana. This is due to early values of heartbeat rate means no visual heart coagulation and obvious delayed growth of beat during the observation period which embryos. Delayed of hatching process could indicate delayed growth.However, only be attributed possibly to the inhibition of the embryos at 0.1% of extracts of A. muricata release of chorionase, an enzyme responsible and A. squamosa showed obvious heartbeat for hatching [47] by the plant extracts. but lower than those in control. These results Another reason for delay or failure to hatch suggest that the three plant extracts are was due to the abnormalities which resulted cardiotoxic to D. rerio embryos. This effect to the limited movement of treated embryos, could be attributed to cardiac glycoside thus unable to break the chorion. present in the three plant extracts. According Teratogenic Effects of Fruit Rind Extracts to Poindexter et al. [45] as cited by Jose et al. Delayed growth is one of the distinct [46], the cardiac glycoside was found to teratogenic effects of the three extracts. The inhibit the myocardial Na-K ATPase enzyme percentage delayed growth of embryos that causes an increase in contraction force of exposed in varying concentrations of the the heart which can lead to cardiac arrest. extracts after 48 hours was observed and the Hatchability of Zebrafish results are shown in Table 3. Embryos An indicative of successful developmental showed 100% delayed growth when exposed process is hatching. The mean percentage in 0.5% and higher concentrations of both A. hatchability of the embryos exposed to muricata and A. squamosa extracts, and in various concentrations of A. muricata, A. 0.1% and higher concentrations of G. squamosa, and G. mangostana extracts is mangostana extract. The 0.1% also presented in Table 3.Control embryos concentrations of the first two extracts completed their hatching period at 48 hours registered low percentage delayed growth but post treatment exposure. The 0.1% of A. found statistically comparable to those in muricata extract-treated embryos control. Aside from delayed growth, the demonstrated mean percentage hatchability different morphological abnormalities were of 33.33% which was significantly lower also observed, and the most common 945 IJBPAS, May, 2018, 7(5)
Robert I. Palambergo et al Research Article abnormality was tail malformation (Figure were still in advanced segmentation phase 1). Bent-tail tip embryos were observed at (Figure 1F) during the last observation 0.1% of both extracts of A. muricata and A. period. In the previous work of Noordin et al. squamosa. This abnormality is probably due [41], the survived embryos of zebrafish did to the disturbance of embryonic development not show any malformation when exposed to of D. rerio. However, embryos treated with xanthone from the pericarp of G. G. mangostana extract did not show any mangostana. malformations, which probably due to the very obvious delayed growth. These embryos Table 1: Phytochemical composition of fruit rinds of A. muricata, A. squamosa, and G. mangostana Phytochemical A.muricata A.squamosa G.mangostana Tannin Present Present Present Saponin Present Present Present Flavonoid Present Present Not detected Terpenoid Present Present Present Cardiac Glycoside Present Present Present Table 2: Mortality of D. rerioembryo after 12, 24, 36, and 48 hours of exposure at the different concentrations of fruit rind extracts of A. muricata, A. squamosa, and G. mangostana Fruit Rind Extract (%) Mortality (%) 12 h 24 h 36 h 48 h A. muricata 3.00 100.00a 100.00a 100.00a 100.00a 2.00 100.00a 100.00a 100.00a 100.00a 1.00 75.00a 100.00a 100.00a 100.00a 0.50 0.00b 8.25b 16.75b 100.00a 0.10 0.00b 0.00b 0.00bc 0.00b 0.00 0.00b 0.00b 0.00bc 0.00b A. squamosa 3.00 100.00a 100.00a 100.00a 100.00a 2.00 91.75a 100.00a 100.00a 100.00a 1.00 58.25b 83.25ab 100.00a 100.00a 0.50 0.00c 0.00c 100.00a 100.00a 0.10 0.00c 0.00c 0.00b 0.00b 0.00 0.00c 0.00c 0.00b 0.00b G. mangostana 3.00 100.00a 100.00a 100.00a 100.00a 2.00 100.00a 100.00a 100.00a 100.00a 1.00 0.00b 41.75b 100.00a 100.00a 0.50 0.00b 0.00c 8.25b 75.00ab 0.10 0.00b 0.00c 0.00b 0.00c b c b 0.00 0.00 0.00 0.00 0.00c Values are expressed as mean of three replicates each concentration of extracts. Means with the same letter of superscript are not significantly different at P
Robert I. Palambergo et al Research Article Table 3: Heartbeat rate, percentage hatchability, and percentage delayed growth of D. rerio embryos at the different concentrations of three fruit rind extracts Fruit Rind Extract (%) Heartbeat rate Hatchability Delayed growth (%) (per minute) (%) A. muricata 3.0 NBH 0.00c 100.00a c 2.0 NBH 0.00 100.00a c 1.0 NBH 0.00 100.00a b c 0.5 0.00 0.00 100.00a a b 0.1 127.00 33.33 8.33b a a 0.0 137.67 100.00 0.00b A. squamosa 3.0 NBH 0.00b 100.00a b 2.0 NBH 0.00 100.00a b 1.0 NBH 0.00 100.00a b 0.5 NBH 0.00 100.00a b b 0.1 106.67 0.00 16.67b a a 0.0 145.33 100.00 0.00b G. mangostana 3.0 NBH 0.00b 100.00a b 2.0 NBH 0.00 100.00a b 1.0 NBH 0.00 100.00a b b 0.5 0.00 0.00 100.00a b b 0.1 0.00 0.00 100.00a a a 0.0 150.67 100.00 0.00b Values are expressed as mean of three replicates each concentration of extracts. Means with the same letter of superscript are not significantly different at P
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