Journal of
Pharmacognosy and Phytotherapy

  • Abbreviation: J. Pharmacognosy Phytother.
  • Language: English
  • ISSN: 2141-2502
  • DOI: 10.5897/JPP
  • Start Year: 2009
  • Published Articles: 229

Full Length Research Paper

Phytochemical profiling, body weight effect and anti-hypercholesterolemia potentials of Cnidoscolus aconitifolius leaf extracts in male albino rat

Chukwu, Ezinne. C.
  • Chukwu, Ezinne. C.
  • Department of Biochemistry, Federal University of Lafia, Nasarawa State, Nigeria.
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Osuocha, Kelechi U.
  • Osuocha, Kelechi U.
  • Biochemistry Unit, Department of Science Laboratory Technology, Federal University of Lafia, Nasarawa State, Nigeria.
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Iwueke, Adaku V
  • Iwueke, Adaku V
  • Department of Biochemistry, PAMO University of Medical Sciences, Rivers State, Nigeria.
  • Google Scholar

  •  Received: 23 October 2016
  •  Accepted: 16 November 2016
  •  Published: 30 April 2020


The present study investigated the phytochemical constituents of Cnidoscolus aconitifolius leaves extracts and its anti-hypercholesterolemia potentials using standard analytical methods. Forty five male albino rats weighing (115-121 g), divided into nine groups of five rats were used.  Group I served as the control while the other groups were administered 200, 400, 600 and 800 mg/kg body weight of aqueous and ethanol leaf extracts. GC-MS analysis showed 3,7,1,5-tetramethyl-2-hexadecen-1-ol, farnesyl bromide, β–sitosterol, squalene, β-amyrin, 1-heptatriacotanol, hexadecanoic acid, methyl ester, 2-pentadecanone, 6,10,14-trimethyl- ,n-hexadecanoic acid, 9,12-octadecadienoyl chloride, (Z,Z, δ- tocopherol, Ergosta-5,22-dien-3-ol acetate, (3β,22E)-, 9,10-secocholesta-5,7,10(19)-triene-3,24,25-triol, (3β,5Z,7E)-acetamide, N-methyl-N-[4-(3-hydroxypyrrolidinyl)-2-butynyl]-, 1-gala-I-ido-octose, 10-methyl-E-11-tridecen-1-ol propionate, dodecanoic acid, 2-(acetyloxy)-1-[(acetyloxy)methyl]ethyl ester, 11,14-octadecadienoic acid, methyl ester, cyclopentaneundecanoic acid and methyl ester. Lipid profile showed significant reduction in TC, LDL and TG with increase in HDL in dose dependent ratio. This shows that extracts of this plant could be useful in treatment of coronary heart diseases.               

Key words: Phytochemicals,hypercholesterolemia, Cnidoscolus aconitifolius, potentials.


The use of medicinal plants in disease treatment has attracted the interest of man as these plants serve as potential sources of natural compounds with biological activities. Especially in developing countries, man has tried to lessen pain or treat diseases using plants with medicinal properties (Sakpa and Okhimamhe, 2014; Hussein et al., 2016). Dhanalakshmi and Manavalan (2014) posited that plants owing to its  medicinal  efficacy have continued to play a dominant role in the maintenance of human health. Plants derived medicine has been a part of the evolution of human healthcare for thousands of years (Sowmya et al., 2015). According to Ebeye et al. (2015), many people have for centuries developed various herbal medicines using locally available plants as remedy to their health problems. Oluwatosin et al.  (2011) reported  that  herbal  medicines derived from plants extracts are being utilized increasingly to treat a wide variety of diseases and these plants are good sources of bioactive compounds and may boost the endogenous antioxidant defense system. Cnidoscolus aconitifolius belongs to the family of Euphorbiaceae. It is an evergreen, drought deciduous shrubs up to 6 m in height with alternate palmate lobed leaves, milky sap and small flowers on dichotomously branched cymes (Oyeyemi and Ajani, 2014). It is a widely distributed annual plant, ranging from temperate to tropical zones and has a long history of use as both  medicine and edible plant and due to its ease of cultivation, potential productivity and substantial nutritional value, the plant has spread all over the world including the tropics  (Omotoso et al., 2014a). Ross‑Ibarra and Molina‑Cruz (2002) opined that due to its tolerance to poor growth conditions and resistance to pests and diseases, the plant has remained a valuable potential crop that could medically benefit people of different regions. C. aconitifolius leaves has been claimed traditionally to possess medicinal properties and efficacy such as darkening of gray hair, treating alcoholism, insomnia, gout, scorpion sting, brain and vision improvement (Mordi et al., 2013). In view of all the reputed medicinal efficacy of this plant leaves, the present study was aimed at evaluating the bioactive constituents of this plant leaves in order to ensure holistic utilization of this plant in disease treatments.



C. aconitifolius leaves were harvested from Acha in Isuikwuato L.G.A Abia State Nigeria. The leaves were separated from stem and washed with clean water and dried at room temperature. The dried plant leaves were ground into powder form using blender which was transferred into an air tight container stored at room temperature.

Preliminary phytochemical screening

The methods described by Odebiyi and sofowora (1978) were used to test for the presence of saponins, tannins, phenolics and alkaloids. Lieberman Burchad reaction as described by Herburne (1973 and Sofowara, 1993) was used for steroids and glycosides determination.

Phytochemicals analysis of C. aconitifolius leaves using GC-MS

The samples for GC-MS analysis were prepared by dissolving 3 g of extracted powder in methanol solvent. For the analysis, GC-MS-QP 2010 SHIMADZU instrument was used. To analyze the sample, the column oven and Injector temperature was set at 800 and 200°C respectively. The flow control mode was maintained in linear velocity with a split injection mode split ratio of 20. The column flow was 1.46 ml/min with a helium carrier gas of 99.9995% purity. The column oven temperature program was set as follows: The temperature was set at 80°C with 2 min hold time at the rate of 10. The temperature was 300°C with 10 min hold time. The column at 5 min was used with a length of 30 mm and diameter of 0.25 mm and its film thickness was 0.25 mm. The ion source temperature for MS condition was 200°C and interface temperature was 240°C. Starting m/z (mass to charge) ratio was 40 and ending with m/z ratio of 700. (40-700 m/z).

Identification of components

Interpretation of mass spectrum GC-MS was conducted using the NIST Database. The spectrums of the unknown components were compared with spectrum of known components stored in the NIST library. The name, molecular weight and structure of the components of the test materials were ascertained.

Preparation of aqueous leaf extract

Exactly 200 g of the powdered plant were measured into a conical flask and 500 ml of water was added and left at room temperature for 48 h. The extracts were filtered. The filtrate was evaporated to dryness on a water bath to give a crude extract. The extraction efficiency was quantified by determining the weight of the extract. The dried extract was stored in desiccators until required for use. The extract was dissolved in appropriate volume of distilled water to the desired concentration (Gidado et al., 2005).

Preparation of ethanol leaf extract

Exactly 200 g of the powdered plant were measured into a conical flask and 500 ml of 70% ethanol were added and left at room temperature for 48 h. The extract was filtered. The filtrate was evaporated to dryness on a water bath (50°C) to give the crude extract, whose the mass was determined.

Experimental design

Forty five male albino rats aged 9 weeks weighing 115 - 121g were used for this study. The animals were randomly divided into 9 groups of 5 rats each for biochemical assessment of the effect of aqueous and ethanol extracts of C. aconitifolius leaves.  Group I served as control, Group II received 200 mg of aqueous extract, Group III received 400 mg of aqueous extract per kg body weight, Group IV received 600 mg of aqueous extract and Group V received 800 mg of aqueous extract. Group VI received 200 mg of ethanol extract while Group VII received 400 mg of ethanol extract per kg body weight. Group VIII received 600 mg/kg while Group IX received 800 mg/kg body weight of ethanol extract. Each group of animals were housed in a standard rat cage and allowed to acclimatize to laboratory condition for one week prior to commencement of feeding experiments. The extracts were administered once on daily basis. All animals were allowed free access to water and feed ad libitum.  The method of administration of the extracts was by oral gavages which lasted for 28 days.

Determination of lipid profile

The method of Fossati and Prencipe (1982) was employed in the determination of lipid profile.

Statistical analysis

The statistical analysis of results was done using students package for social sciences (SPSS) version 20 computer software and data collected were analyzed using Analysis of Variance (ANOVA).

Means were separated using Least Significant Difference (LSD).



The preliminary phytochemical results above shows the presence of alkaloids, tannins, saponins, flavoniods, oxalate and in aqueous and ethanol leaf extracts while ethanol leaf extract shows the absence of cyanogenic glycosides which was present in aqueous leaf extract (Table 1).



Results of the GC-MS analysis of C. aconitifolius leaf extract showed 19 compounds. The fragmentation pattern of the major compound was 3,7,11,15-tetramethyl-2-hexadecen-1-ol with percentage peak of 22.733% and retention time of 14.736. Farnesyl bromide was also detected with percentage area peak of 19.457% and a retention time of 31.499 was also detected.  β –Sitosterol with area peak of 16.513% and retention time of 31.841 was detected. Squalene with area peak of 14.469% and retention time 24.476 was found. β-Amyrin with area peak of 5.168%  and retention time of 34.697 and 1-Heptatriacotanol with peak area of 4.232% and retention time of 32.168 were also detected. Hexadecanoic acid, methyl ester was found with area peak of 2.705 with retention time of 12.436. 2-Pentadecanone, 6,10,14-trimethyl- with area peak of 2.556 and retention time of 11.490 was detected.  n-Hexadecanoic acid with area peak of 2.115% with retention time of 12.880; 9,12-octadecadienoyl chloride, (Z,Z)-with area peak of 1.885% and retention time of 14.608;  δ-tocopherol with area peak of 1.454% and retention time of 26.166; ergosta-5,22-dien-3-ol,acetate, (3β,22E)- with area peak of 1.039% and retention time of 30.600; 9,10-Secocholesta-5,7,10(19)-triene-3,24,25-triol, (3β,5Z,7E)- with area peak of 0.912% and retention time of 29.616 were detected (Figure 1). Acetamide, N-methyl-N-[4-(3-hydroxypyrrolidinyl)-2-butynyl]- with area peak of 0.852% with retention time of 10.987; I-Gala-I-ido-octose with area peak of 0.843% and retention time of 4.462; 10-methyl-E-11-tridecen-1-ol propionate with area peak of 0.822% and retention time of 11.436 (Figure 1) were also detected. Dodecanoic acid, 2-(acetyloxy)-1-[(acetyloxy)methyl]ethyl ester with area peak of 0.776% with retention time of 11.688; 11,14-octadecadienoic acid, methyl ester with area peak of 0.758 and retention time of 14.528 and cyclopentaneundecanoic acid, methyl ester with area peak of 0.709% with retention time of 14.961 were also detected.



Results of lipid profile presented in Table 4 shows that total cholesterol ranged from 83.56 mg/dl in the control to 64.23mg/dl in the treated group. Results indicate a gradual reduction in total cholesterol level in treated groups compared to control (p<0.05). Results of triglyceride show a range of 69.84 to 91.10mg/dl. Results show that the control had the highest triglyceride value of 91.10 mg/dl while group IX administered 800 mg/kg body weight of C. aconitifolius ethanol leaf extract had the least value of 69.84 mg/dl. High density lipoprotein result shows that the control had the lowest value of 30.32 mg/dl while group IX had the highest value of 48.78 mg/dl. Results suggest a gradual increase in high density lipoprotein level with increasing dosage of C. aconitifolius leaf extracts. Results of low density lipoprotein indicate that the control had the highest value of 71.46 mg/dl while group IX recorded the least value of 29.41 mg/dl.





Phytochemical constituents are responsible for most medicinal activities attributed to medicinal plant species (Obichi et al., 2015). The analysis of these phytochemicals is paramount as World Health Organization (WHO) has specified the need to determine the composition of biologically active substances considered for nutritional and medicinal purposes (WHO, 2012). The preliminary phytochemical analysis carried out on aqueous and ethanol extracts of C. aconitifolius leaves showed the presence of some bioactive compounds in the plant as presented in (Table 1). Results showed the presence of tannins, saponins, phenol, oxalate, phytate and alkaloids in aqueous and ethanol leaf extract. Flavoniods were absent in aqueous leaf extract while cyanogenic glycosides was absent in the  ethanol leaf  extract.  This  finding  is  in  consonance  with previous reports of Awoyinka et al. (2007) and Oluwatosin et al. (2011) who reported absence of cyanogenic glycosides in C. aconitifolius ethanolic leaf extract. but contrary to the findings of Adaramoye and  Aluko  (2011) who reported presence of cyanogenic glycoside in ethanol leaf  extract  of  C. aconitifolius.  This could be adduced to be as a result of environmental factors or method of extraction.  Analysis of tannins in the two extracts was positive but higher colour intensity was observed in the ethanol extract than the aqueous leaf extract. This could be attributed to the ethanol extracting potentials; more than water. Tannins are complex moiety with wide pharmacological activities and are produced by majority of plants as protective substance (Yakubu et al., 2008). The presence of tannins suggests the ability of this plant to play a major role as antihaemorrhagic agent (Araujo et al., 2008). Parekh and Chanda (2007) posited that tannins are known to react with proteins to provide the typical tanning effects which are important for the treatment of inflamed or ulcerated tissues. Araujo et al. (2008) also opined that the healing and anti-inflammatory activities popularly attributed to C. aconitifolius may be strongly associated with its tannin content.

Analysis of saponins shows positive results for both aqueous and ethanol leaf extracts. However, intense persistent frosting was observed in the ethanol extract than the aqueous extract. This could also be attributed to the extracting potentials of ethanol. Studies have shown that saponin play immense role as antihyperglycaemia, antihypercholesterolemia, cardiac depressant and dietary source of saponins have been implicated in chemopreventive strategy in lowering the risk of human cancer (Olaleye, 2007). Results of alkaloids analysis show that alkaloids were present in both extracts but more intense in ethanol extract than the aqueous extracts. The main reason that can be adduced for this is the solvent of extraction. Alkaloid is one of the largest groups of phytochemicals in plants and has been reported to be effective in the treatment of intestinal infections and hypertension (Akinpelu and Onakoya, 2006). This could also further justify the local use of C.aconitifolius leaf extracts in the management of cardiac related issues.

Cardiac glycoside was also detected in aqueous extract but absent in ethanolic extract. This is in concomitant with the reports of Mordi and Akanji (2012) who also reported absence of cardiac glycoside in ethanol leaf extract of C. aconitifolius.  Olayinka et al. (1992) posited that cardiac glycosides have been used for over two centuries as stimulants in cases of cardiac failure. This perhaps may justify the already locally established function of the plant in the treatment and management of hypertension.

Flavonoids were absent in aqueous extract but present in ethanol extract of C. aconitifolius leaf. Similar findings have been reported by Awoyinka et al. (2007) and Mordi and Akanji (2012) who reported absence of flavonoids in aqueous leaf extract of C. aconitifolius.  Sofowora (1993) opined that flavonoids contribute to the brilliant multi colour for most plants. Hence, the absence of flavonoid in the aqueous leaf extract may substantiate the sole greenish appearance of this leafy vegetable. Flavonoids have been reported to exhibit anti-oxidative properties through several mechanisms, such as scavenging of free radicals, chelation of metal ions such as iron and copper, inhibition of hydrolytic and oxidative enzymes and also act as anti-inflammatory agent (Kessler et al., 2003). On this premise, it may be advisable to extract the leaf of C. aconitifolius with ethanol in an attempt to exploit its anti-oxidative and anti-inflammatory properties since flavonoids are known to be effective for these purposes.

Phytate was obtained from this study in both aqueous and ethanolic extracts and its presence has been linked to the prevention of kidney stone, dental decay and calcification of blood vessels (Dutta and Chaudhuri, 2015). Aberoumand and Deokule (2009) opined that phytate may have beneficial roles as an antioxidant and antcarcinogen. Phenols were observed in both aqueous and ethanol leaf extracts. This is an indication that the plant might play an important role as dietary antioxidants as phenol have been known to prevent oxidative damage in living systems (Zee-cheng, 1997). Findings from this study show that the bioactive constituents of C. aconitifolius could be better extracted using ethanol as solvent of extraction.

Gas chromatography-mass spectroscopy analyses of compounds are presented in Table 2. The GC-MS analysis of C. aconitifolius leaves revealed a total of 19 prevailing compounds in methanol extract of C. aconitifolius leaf that could contribute to the medicinal relevance of the plant (Figure 1). The phyto-components with their respective retention time (RT), molecular formula, molecular weight (Mw) and relative percentages (peak areas %) are presented in Table 2. The major phytoconstituents present are I-Gala-I-ido-octose, acetamide, N-methyl-N-[4-(3-hydroxypyrrolidinyl)-2-butynyl]-,10-methyl-E-11-tridecen-1-ol propionate, 2-pentadecanone, 6,10,14-trimethyl-, dodecanoic acid, 2-(acetyloxy)-1-[(acetyloxy)methyl]ethyl ester, hexadecanoic acid, methyl ester,  n-hexadecanoic acid, 11,14-octadecadienoic acid, methyl ester, 9,12-octadecadienoyl chloride, (Z,Z)-,3,7,11,15-tetramethyl-2-hexadecen-1-ol, cyclopentaneundecanoic acid, methyl ester, squalene, δ- tocopherol, 9,10-secocholesta-5,7,10(19)-triene-3,24,25-triol, (3β,5Z,7E)-,ergosta-5,22-dien-3-ol,acetate, (3β,22E)-, farnesyl bromide, β –sitosterol, 1-heptatriacotanol and β-amyrin as shown in Table 2. The l-gala-l-ido-octose has been reported to be used for the synthesis of higher sugar which are necessary for the production of drugs used to specifically facilitate learning or memory,  particularly to prevent cognitive deficits associated with dementias (Jun et al., 2015). Another phytoconstituent identified is 10-methyl-E-11-tridecen-1-ol propionate, an alcoholic compound and have been reported to have antimicrobial properties (Mina et al., 2015). The presence of n- hexadecanioc acid shows that the plant can exhibit antioxidant,  lubricant,  nematicid , pesticide, hemolytic and 5-alpha reductase inhibition, flavor and antiandrogenic properties. Rency et al. (2015) also reported similar bioactivity on n- Hexadecanioc acid.  δ- Tocopherol was also  detected  in the plant extract. Urooj et al. (2016) posited that  the presence of vitamin-E  in plant is an indication that the plant leaves have strong anti-oxidant and neuroprotective activities. δ- Tocopherol has been reported to exhibit antiageing, analgesic, anti-diabetic, anti -inflammatory, antioxidant and anti-leukemic activity (Prabhadevi et al., 2012). Squalene obtained from this study is suggested to be a triterpene having antibacterial, antioxidant, pesticide, antitumor, immune-stimulant and chemo preventive potentials (Kala et al., 2011; Dhanalakshmi and Manavalan, 2014). The compound squalene has also been reported to play a role in the synthesis of cholesterol, steroid hormones and vitamin D in human body (Rency et al., 2015). The phyto-component 9-octadecenoic acid (z) have also been reported to possess some biological activity such as anti-inflammatory, anti-alopecic, haemolytic 5-α reductase inhibitor, lubricant, antitumor, immune-stimulant, diuretic, antiandrogenic, antibacterial, antifungal, and lipoxygenase inhibitor activities (Ogunlesi et al., 2010; Omotoso et al., 2014a).



The mean body weight changes of rats administered aqueous and ethanol leaf extracts of C. aconitifolius is presented in Table 3. There was significant percentage weight reduction in rats administered 400, 600 and 800 mg/kg body weight of aqueous leaf extract of C. aconitifolius in a dose dependent manner. Chinyere et al. (2015) reported that weight reduction in experimental animal may be due to toxicity of the fed diet, unacceptability of diet by animals, indigestion and presence of non-nutritional factors in the diet. Result suggest that rats administered ethanol extract had significant percentage weight gain compared to the control (p<0.05). The significant weight gain observed with the rats administered ethanol leaf extract of C. aconitifolius suggest that the extract may not be toxic and the solvent may have extracted the bioactive ingredients more. This finding is in accordance with the reports of Kim et al. (2006) and Ebeye et al. (2015) who demonstrated significant increase in body weight of albino rats fed with C. aconitifolius ethanol leaf extract. The significant increase in body weight observed from this study could also be due to the fact that C. aconitifolius leaves contain valuable and viable nutritional constituents that are needed for growth, body repair and maintenance which may increase appetite resulting in increased food intake which ultimately may lead to increase in the body weights observed. This shows that C. aconitifolius ethanol extract could be effective in improving body weight loss. This report is in accordance with the findings of Mordi (2012) and Odokuma (2012) who posited increase in body weight of rats fed with C. aconitifolius leaves. This study revealed significant increase in body weight in the groups fed with ethanol extract compared to those fed with aqueous extracts. This could also be as a result of the absence toxic constituents in the ethanol extract which may have led credence to the observed weight gain.




Lipids have been reported to play important role in cardiovascular diseases not  only  by way of hyperlipidaemia and development of atherosclerosis but also by modifying the composition, structure and stability of cellular membrane (Chinyere et al., 2015). According to Mathew (2000), excessive lipids in the blood are considered to accelerate the development of atherosclerosis and are the major risk factor in myocardial infarction. Anofi and Mutiu (2015) also posited that alterations in the concentration of lipids like total cholesterol, high density lipoprotein cholesterol and triglycerides can provide information on the status of lipid metabolism as well as predisposition of the animals to atherosclerosis. Cholesterol is an essential substance involved in many cellular functions, including the maintenance of membrane fluidity, production of vitamin D on the surface of the skin, production of hormones and possibly helping cell connections in the brain (Ugwu et al., 2011). Mohale et al. (2008) also noted that high levels of circulating cholesterol and its accumulation in heart tissue are well associated with cardiovascular damage. Results of total cholesterol showed significant decrease in total cholesterol level of rats administered C. aconitifolius leaf extract compared to control (p<0.05). This decrease may be attributed to bioactive constituents of C. aconitifolius leaf which may have promoted the actions of high density lipoprotein responsible for transporting cholesterol out of the blood. This may justify its local usage in management of heart related diseases. Triglycerides accumulation in serum has been reported as one of the risk factors in coronary heart diseases (Mohale et al., 2008). Results also showed significant decrease in the level of triglycerides in rats administered C. aconitifolius leaf extracts compared to  control (p<0.05). This suggests that C. aconitifolius leaf extracts may play important role in management of coronary heart diseases.

High density lipoprotein is an antiatherogenic factor which is important in the transport of cholesterol from cells to the liver where it is catabolised (Lacko et al., 2000). High density lipoprotein (HDL) results shows significant increase in the groups treated with C. aconitifolius leaf extracts compared to control (p<0.05). This may suggest  that  there  was  continuous  export  of excess cholesterol to the liver for excretion into the bile which may reduce the risk of atherosclerosis or coronary diseases. This increase in HDL may be attributed to the bioactive constituents of the plant and may substantiate the cardio-protective effects of C. aconitifolius leaf extracts. Low density lipoprotein is a known triggering factor for coronary occlusion (Ezekwe et al., 2014). Findings from the present study indicate marked reduction in low density lipoprotein level in rats administered C. aconitifolius leaf extracts compared to control (p<0.05). The decrease in serum low density lipoprotein may be understandable since according to Yakubu et al. (2008) a decrease in serum total cholesterol should normally result in a decrease in low density lipoprotein. This decrease in low density lipoprotein may be one of the prominent beneficial effects of consuming C. aconitifolius leaf extracts as low serum low density lipoprotein (LDL) have been reported to signify less risk to coronary heart diseases (Mohale et al., 2008). However, a more significant reduction in total cholesterol, triglyceride, low density lipoprotein and increase in high density lipoprotein was recorded from the groups administered ethanol extract relative to the groups administered aqueous leaf extract. This may further suggest the use of ethanol in extraction of the bioactive constituents of C. aconitifolius leaf in order to fully utilize its potential medicinal properties in management of diseases.





This study has revealed the bioactive components in C. aconitifolius leaf extracts and its potentials in reduction of cholesterol level. It is therefore suggested that ethanol may be a better solvent of extraction and adequate use of this plant leaf should be encouraged in order to maximize its medicinal efficacies.



The authors have not declared any conflict of interests.



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