|Year : 2015 | Volume
| Issue : 2 | Page : 156-165
Evaluation of Antidiabetic and Antihyperlipidemic Effects of Hydroalcoholic Extract of Leaves of Ocimum tenuiflorum (Lamiaceae) and Prediction of Biological Activity of its Phytoconstituents
Subramani Parasuraman1, Subramani Balamurugan2, Parayil Varghese Christapher1, Rajendran Ramesh Petchi3, Wong Yeng Yeng1, Jeyabalan Sujithra1, Chockalingam Vijaya3
1 Unit of Pharmacology, Faculty of Pharmacy, AIMST University, Bedong 08100, Kedah, Malaysia
2 Department of Pharmacology, College of Pharmacy, Madras Medical College, Chennai, India
3 Department of Pharmacology, Ultra College of Pharmacy, Madurai, Tamil Nadu, India
|Date of Submission||08-Aug-2014|
|Date of Acceptance||30-Sep-2014|
|Date of Web Publication||16-Feb-2015|
Unit of Pharmacology, Faculty of Pharmacy, AIMST University, Bedong 08100, Kedah, Malaysia
Source of Support: None, Conflict of Interest: None
| Abstract|| |
Objective: The aim was to evaluate the anti-diabetic and anti-hyperlipidemic effects of hydroalcoholic extract of leaves of Ocimum tenuiflorum (Lamiaceae) and prediction of biological activities of its phytoconstituents using in vivo anti-diabetic model and in silico analysis respectively. Materials and Methods: The leaves of O. tenuiflorum were extracted with 60% ethanol, and the extract was used for further pharmacological screening. The acute toxicity of the extract was evaluated as per the guidelines set by the Organization for Economic Co-operation and Development, revised draft guidelines 423. The oral anti-diabetic activity of the hydroalcoholic extract of O. tenuiflorum (125, 250 and 500 mg/kg) was studied against streptozotocin (STZ) (50 mg/kg; i.p.) + nicotinamide (120 mg/kg; i.p.) induced diabetes mellitus. The animals were treated with the investigational plant extract and standard drug (glibenclamide) for 21 consecutive days and the effect of hydroalcoholic extract of O. tenuiflorum on blood glucose levels was measured at regular intervals. At the end of the study, blood samples were collected from all the animals for biochemical estimation, then the animals were sacrificed and the liver and kidney were collected for organ weight analysis. Prediction for pharmacological and toxicological properties of phytoconstituents of O. tenuiflorum was carried out using online web tools such as online pass prediction and lazar toxicity prediction. Results: The hydroalcoholic extract of O. tenuiflorum showed significant anti-diabetic and anti-hyperlipidemic activity at 250 and 500 mg/kg, and this effect was comparable with that of glibenclamide. Predicted biological activities of phytoconstituents of O. tenuiflorum showed presence of various pharmacological actions, which includes anti-diabetic and anti-hyperlipidemic activities. Prediction of toxicological properties of phytoconstituents of O. tenuiflorum did not show any major toxic effects. Conclusion: The hydroalcoholic extract of O. tenuiflorum showed significant anti-diabetic and anti-hyperlipidemic activity against STZ + nicotinamide induced diabetes mellitus in rats. Further studies are required to confirm the anti-diabetic and anti-hyperlipidemic activities of individual phytoconstituents of O. tenuiflorum.
Keywords: Anti-diabetic activity, Anti-hyperlipidemic activity, In silico analysis, Ocimum tenuiflorum, Phytoconstituents
|How to cite this article:|
Parasuraman S, Balamurugan S, Christapher PV, Petchi RR, Yeng WY, Sujithra J, Vijaya C. Evaluation of Antidiabetic and Antihyperlipidemic Effects of Hydroalcoholic Extract of Leaves of Ocimum tenuiflorum (Lamiaceae) and Prediction of Biological Activity of its Phytoconstituents. Phcog Res 2015;7:156-65
|How to cite this URL:|
Parasuraman S, Balamurugan S, Christapher PV, Petchi RR, Yeng WY, Sujithra J, Vijaya C. Evaluation of Antidiabetic and Antihyperlipidemic Effects of Hydroalcoholic Extract of Leaves of Ocimum tenuiflorum (Lamiaceae) and Prediction of Biological Activity of its Phytoconstituents. Phcog Res [serial online] 2015 [cited 2020 Aug 6];7:156-65. Available from: http://www.phcogres.com/text.asp?2015/7/2/156/151457
| Introduction|| |
Ocimum tenuiflorum (Ocimum sanctum) belongs to the family of Lamiaceae and is commonly known as Thulasi/Tulsi in India. It is widely grown in all regions and is considered as the sacred plant of India. Tulsi or Holy Basil is a sacred plant used by Vaishnavas for thousands of years. In Indian sub-continent, fresh leaves of this plant are most commonly used for the treatment of cough, cold, abdominal pain, skin diseases, arthritis, painful eye diseases, measles, and diarrhea. The preclinical evaluation on various extracts of different parts of O. tenuiflorum showed anti-fertility, anti-cancer, anti-diabetic, anti-fungal, hepatoprotective and cardioprotective actions.  Mixture of Tulsi leaves and black pepper seeds are used for the treatment of fever and malaria as a traditional medicine.  In Ayurveda, the therapeutic effect of Tulsi is well-described as Dashemani Shwasaharni (anti-asthmatic) and anti-kaphic drugs (Kaphaghna).  The leaves of the Tulsi contain essential oils including carvacrol, ursolic acid, eugenol and the seeds contain fixed oils, including oinoleic acid, oleic acid, palmitic acid, and stearic acid.  The reported activities are determined using the crude extract of either the whole plant or parts of the plant and only a few studies are available with the individual phytoconstituent's effects. Ethanolic extract of O. Sanctum at 400 mg/kg showed significant anti-diabetic effect in alloxan induced diabetes mellitus in rats, and the fixed oil of O. sanctum significantly reduced hyperlipidemia induced by high fat diet fed Wistar rats. , The effect of O. tenuiflorum on streptozotocin (STZ) induced diabetes mellitus and hyperlipidemia remains unclear. Hence, this study was planned to evaluate the anti-diabetic and anti-hyperlipidemic effects of hydroalcoholic extract of leaves of O. tenuiflorum (Lamiaceae) using STZ induced diabetes mellitus in rats and prediction of biological activities of its phytoconstituents using in silico analysis, respectively.
| Materials and methods|| |
Evaluation of anti-diabetic and anti-hyperlipidemic effects of hydroalcoholic extract of leaves of Ocimum tenuiflorum
Ocimum is a genus of about 68 different species of aromatic annual and perennial herbs and shrubs in the family of Lamiaceae, native of a tropical region. O. tenuiflorum is 30-70 cm height erect herb, which grows in semitropical and tropical parts of India. Leaves have aromatic taste and are 2.5-5 cm long and 1.6-3.2 cm simple, opposite, elliptic, oblong or acute, with entire or sub-serrate or dentate margins, pubescent on both sides, minutely gland-dotted, with slender, hairy petioles. Inflorescence is verticillate and flowers are in racemes 15-20 cm long in close whorls. ,
Collection of the plant
Taxonomically identified O. tenuiflorum (Lamiaceae) plant was collected from rural parts of Vellore, Tamil Nadu in December 2013. Plant was identified and authenticated by Botanist of the Agricultural Research Station, Vellore, Tamil Nadu. The plant leaves were dried under the shade for a week and grounded using an electrical grinder to a coarse powder.
Extraction of leaves
The powdered leaves of O. tenuiflorum was packed in a soxhlet apparatus and extracted with 60% ethanol. The extraction was carried out for 24 h at about 55-60°C; the extract was filtered through muslin cloth. The filtrate was concentrated to a dry mass by evaporation under reduced pressure. The yield was found to be 7% w/v. The hydroalcoholic extract of leaves of O. tenuiflorum was stored in a desiccator at room temperature until further analysis.
Streptozotocin was purchased from Avra Synthesis Pvt Ltd., Hyderabad. Glibenclamide was received as a gift drug from Aurobindo Pharma Ltd., Hyderabad. Biochemical assay kits for glucose, serum glutamic pyruvate transaminase (SGPT), serum glutamic oxaloacetic transaminase (SGOT), total cholesterol, total protein, triglyceride, and high-density lipoprotein (HDL) cholesterol kits were procured from Coral diagnostics Ltd., Mumbai. All other chemicals used were of analytical grade and purchased from SD Fine Chemicals Limited, India.
The male Wistar albino rats, (180 ± 20 g body weight [BW]), were obtained from Sainath Enterprises, Hyderabad, India. The animals were housed in large, spacious polyacrylic cages at an ambient room temperature with 12 h-light/12 h-dark cycle. Rats have free access to water and rat pellets (VRK Nutritional Solution, Sangli, Maharashtra). The study was approved by the Institute Animal Ethics Committee of Ultra College of Pharmacy, Madurai, India. All the animal experiments were carried out according to Committee for the Purpose of Control and Supervision of Experiments on Animals guidelines.
Acute oral toxicity studies
Acute oral toxicity of the hydroalcoholic extract of O. tenuiflorum was carried out as per the guidelines set by the Organization for Economic Co-operation and Development, revised draft guidelines 423. The principle involves a step-wise procedure with the use of the minimum number of animals per step to obtain sufficient information on the acute toxicity of the test substance to enable its classification. Healthy Wistar rats (3 animals/dose) of either sex were used for the experiment. Overnight fasted rats were orally fed with the hydroalcoholic extract of O. tenuiflorum in increasing dose levels of 5, 50, 300, and 2000 mg/kg BW, respectively. The rats were observed closely for their behavioral, neurological and autonomic profiles continuously for 24 h after dosing. After a period of 24 h, animals were observed (at least two times a day) for 14 days to evaluate the changes on behavioral, neurological, autonomic profiles and mortality. 
Anti-diabetic effect of hydroalcoholic extract of Ocimum tenuiflorum
Healthy, adult male Wistar albino rats weighing between 180 ± 20 g were used for the experiment. Diabetes mellitus was induced in overnight-fasted rats by single intraperitoneal injection of freshly prepared 50 mg/kg BW STZ, followed by 120 mg/kg of nicotimanide (NIC) in 0.1 M citrate buffer (pH 4.5). After 24 h of diabetes mellitus induction, the rats were given 5% w/v of glucose solution (2 ml/kg BW) to prevent hypoglycemic mortality. Diabetes mellitus was confirmed after 48 h of induction by measuring fasting blood glucose level using tail vein blood sample. Rats with fasting blood glucose of more than 200 mg/dl were considered as diabetics and used for further experiment. , Diabetic animals were randomly divided into four groups (Group II-VI) as follows.
Group I: Normal control.
Group II: Diabetic control.
Group III: Diabetic animals treated with glibenclamide (0.25 mg/kg).
Group IV: Diabetic animals treated with hydroalcoholic extract of O. tenuiflorum (125 mg/kg).
Group V: Diabetic animals treated with hydroalcoholic extract of O. tenuiflorum (250 mg/kg).
Group VI: Diabetic animals treated with hydroalcoholic extract of O. tenuiflorum (500 mg/kg).
Group I (normal control) and group II (diabetic control) animals received 0.5% w/v carboxymethyl cellulose (CMC). Animals in group III were treated with 0.25 mg/kg BW of glibenclamide and animals in group IV-VI were treated with hydroalcoholic extract of O. tenuiflorum at dose levels of 125, 250 and 500 mg/kg BW. The doses of hydroalcoholic extract of O. tenuiflorum were selected from toxicology study. The standard and test drugs were suspended in 0.5% w/v CMC and administered once daily through oral gavage for 21 consecutive days. Few drops of venous blood were collected on 7 th and 14 th day of the experiment and immediately used for the estimation of blood glucose (whole blood) with glucometer.  Throughout the study, experiment animals' BW variations were monitored at regular intervals. At end of the study (i.e. 21 st day), blood sample was withdrawn from all the experimental animals through retro-orbital plexus puncture, and the serum was separated and used for biochemical analysis.
During the experiment, blood glucose levels were estimated using animals' whole blood sample with the help of One-Touch Horizon Glucometer; Ortho-Clinical Diagnostics, Johnson and Johnson Company, USA. At the end of the experiment, few milliliter of the blood sample was collected in plain glass tube through retro-orbital plexus and the serum was separated by centrifuging at 3000 RPM for 20 min.  The serum sample was used for estimation of biochemical markers such as total serum cholesterol, serum triglyceride, HDL cholesterol, SGOT, SGPT, creatinine, urea, total protein, and albumin.
The calculated low-density lipoprotein (LDL) cholesterol, HDL ratio, and atherogenic index were determined. The LDL was calculated using Iranian formula (LDL = TC/1.19 + TG/1.9-HDL/1.1-38 [mg/dL]); HDL ratio was calculated using formula ([HDL-cholesterol/TC-HDL-cholesterol]×100 [%]); very low-density lipoprotein (VLDL) was calculated using formula LDL/5; albumin: Creatinine ratio was calculated using formula (albumin/creatinine [g/mg]) and kidney: BW ratio was calculated using formula (weight of both kidney [mg]/BW of the animal [g]). ,,,
All the data were expressed as mean ± standard error of the mean and the statistical significance between the groups were tested using one-way analysis of variance followed by Bonferroni post-hoc test. The statistical analysis was calculated using GraphPad Instat 3.06 (GraphPad Software, CA). P <0.05 was considered as significant.
The leaves of the Tulsi contain essential oils such as benzaldehyde, borneol, n-butylbenzoate, caryophyllene oxide, carvacrol, cis-α-terpineol, cubenol, eugenol, frualdeheyde, limonene, linalool, methyl carvicol (estragol: 1-allyl-4-methoxybenzene), ocimene, oleic acid, sebinene, phytol, veidifloro, β-pinene, α-thujjene, methyl chavicol and ursolic acid. The seeds of the Tulsi contain fixed oils such as oinoleic acid, oleic acid, palmitic acid, and stearic acid. , O. tenuiflorum leaves contain 0.7% of volatile oil including 71% of eugenol and 20% of methyl eugenol. The leaves also contain flavonoids such as orientin and vicenin, and few phenolic compounds namely apigenin, cirsilineol, cirsimaritin, isothymusin, isothymonin, apogenin, rosmarinic acid and eugenol. , The main phytoconstituents present in the plant leaves are eugenol and ursolic acid. The pharmacological screening of whole plant extract or plant part extract showed the presence of various activities, including anti-microbial, hypolipidemic, anti-diabetic, analgesic, anti-inflammatory, cardioprotective and anti-asthmatic activities. ,, Important phytoconstituents of O. tenuiflorum and its phytochemical importance were summarized in [Table 1]. ,,,,,,,,,,,,,,,,,,,,,,,,,,
Prediction of biological activities of constituents of Ocimum tenuiflorum
Ursolic acid, eugenol, carvacrol, linalol, caryphylline, estragole, rosmarinic acid, apigenin and cirsimaritin are the important compound present in the leaves O. tenuiflorum.  The canonical simplified molecular-input line-entry system (SMILES) format of phytoconstituents of O. tenuiflorum were obtained from PubChem [https://pubchem.ncbi.nlm.nih.gov/] and used for biological activity prediction. Prediction of biological activity spectra and toxicity profile were carried out with online prediction of activity spectra of substances (PASS) prediction tools (www.pharmaexpert.ru/passonline/), and lazar toxicity prediction tools (http://lazar.in-silico.de/) respectively in the period between March and May 2014. The input canonical SMILES format of ursolic acid, eugenol, carvacrol, linalol, caryphylline, estragole, rosmarinic acid, apigenin and cirsimaritin were used for prediction of biological activity spectra and toxicity profile [Table 2].
|Table 2: Canonical SMILES format of phytoconstituents of O. tenuiflorum |
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Prediction of biological activity spectra
The PASS internet tools were used for prediction of biological activity of constituents of O. tenuiflorum. The software provided Pa and Pi ratio (active and inactive ratio) in Pa > 30%, Pa > 50% and Pa > 70% levels.
Prediction of toxicity profile
The toxicity of the constituents of O. tenuiflorum was predicted with the help of online lazar toxicity prediction tools. The lazar online toxicity prediction calculated the measured activity based on the comparison of new structure with similar existing structure available in the database. Lazar prediction indicated the active groups in red color and inactive groups in green colour with confidence index.
| Results|| |
Acute oral toxicity studies
Hydroalcoholic extract of O. tenuiflorum did not show any mortality up to 2000 mg/kg when given as single oral administration. Hence, the study was carried out at the dose levels of 125, 250 and 500 mg/kg BW.
Effect of hydroalcoholic extract of Ocimum tenuiflorum on blood glucose in streptozotocin and nicotimanide induced diabetic rats
Throughout the study, a significant reduction in BW was observed with diabetic control and O. tenuiflorum 125 mg/kg treated animals when compared with that of control animals. However, the diabetes mellitus induced BW reduction was inhibited by the glibenclamide and dose of O. tenuiflorum at 250 and 500 mg/kg [Figure 1]. The increase in blood glucose level was observed with diabetic control animals and O. tenuiflorum 125 mg/kg treated animals when compared with that of control animals. The mean blood glucose level in the diabetic control group on day 0 was 227.20 ± 8.55 mg/dl and on day 21 was 284.40 ± 6.82 mg/dl. Whereas significant reduction in blood glucose level was observed with glibenclamide and O. tenuiflorum 250 and 500 mg/kg treated animals when compared with that of diabetic control animals. The effects of O. tenuiflorum 250 and 500 mg/kg on STZ- and NIC- induced diabetic in rats were variable, but the efficacy of O. tenuiflorum 500 mg/kg is comparatively better than O. tenuiflorum 250 mg/kg at the end of the study. The effect of O. tenuiflorum on blood glucose in STZ- and NIC- induced diabetic rats were summarized in [Table 3].
|Figure 1: The effect of hydroalcoholic extract of leaves of O. tenuiflorum on body weight in streptozotocin-and nicotimanide induced diabetic rats (O. tenuiflorum: Hydroalcoholic extract of leaves of O. tenuiflorum. All the values are mean ± standard error of the mean [N = 5]. *P < 0.05, **P < 0.05, **P < 0.05 when compared with control; one-way analysis of variance, followed by Bonferroni post-hoc test) O. tenuiflorum = Ocimum tenuiflorum|
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|Table 3: The effect of hydroalcoholic extract of leaves of O. tenuiflorum on fasting blood glucose levels (mg/dl) in STZ−and NIC−induced diabetic rats |
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Effect of hydroalcoholic extract of Ocimum tenuiflorum on lipid profile in streptozotocin and nicotimanide-induced diabetic rats
Diabetic control and O. tenuiflorum 125 mg/kg treated animals showed significant increase of total cholesterol, triglyceride, LDL cholesterol, VLDL cholesterol levels, and significant reduction in HDL level and HDL ratio when compared with that of control animals. Whereas significant reduction in serum total cholesterol, triglyceride, LDL cholesterol, VLDL cholesterol levels and significant increase in HDL ratio were observed with glibenclamide and and dose of O. tenuiflorum at 250 and 500 mg/kg treated animals when compared with that of diabetic control animals. The effect of O. tenuiflorum on lipid profile in STZ- and NIC- induced diabetic rats were summarized in [Table 4].
|Table 4: Effect of hydroalcoholic extract of leaves of O. tenuiflorum on lipid profile in STZ induced diabetes |
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Effect of hydroalcoholic extract of Ocimum tenuiflorum on biochemical parameters in streptozotocin and nicotimanide induced diabetic rats
Diabetic animals and O. tenuiflorum 125 mg/kg treated animals showed significant increase in SGOT, SGPT, creatinine and urea levels and significant reduction in total protein, albumin and albumin: creatinine ratio when compared with that of control animals, whereas glibenclamide and O. tenuiflorum 250 and 500 mg/kg treated animals reversed the effect of STZ and NIC on biochemical parameters to normal levels. Effects of glibenclamide and O. tenuiflorum on the liver and renal markers of diabetic animals were presented in [Table 5].
|Table 5: The effect of hydroalcoholic extract of leaves of O. tenuiflorum on biochemical parameters in STZ- and NIC- induced diabetic rats |
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Effect of hydroalcoholic extract of Ocimum tenuiflorum on organ weight in streptozotocin and nicotimanide induced diabetic rats
At the end of the study, no significant changes in relative organ weight and kidney: BW ratio were observed with experimental animal groups, but only a significant increase on absolute organ weight of liver was observed when compared with that of control animals. Effects of glibenclamide and O. tenuiflorum on the absolute and relative organ weight of liver and kidney of diabetic animals were summarized in [Table 6].
|Table 6: The effect of hydroalcoholic extract of leaves of O. tenuiflorum on relative, absolute organ weight and kidney weight: Body ratio in STZ− and NIC− induced diabetic rats |
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Prediction of biological activity and toxicity profile of constituents of Ocimum tenuiflorum
The biological activity prediction at 70% levels showed various biological actions which were summarized in [Table 7] and some activities are scientifically proven for O. tenuiflorum phytoconstituents. Most of the O. tenuiflorum phytoconstituents showed anti-inflammatory and anti-diabetic activities at various Pa: Pi levels. Toxicity prediction of the phytoconstituents of O. tenuiflorum did not show any major toxicity, carcinogenicity and mutagenicity [Table 8].
|Table 7: Predicted biological activity of phytoconstituents of O. tenuiflorum |
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|Table 8: Predicted toxicological properties of phytoconstituents of O. tenuiflorum |
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| Discussion|| |
In the present study, an anti-diabetic and hyperlipidemic effects of O. tenuiflorum was studied against chemical (STZ- and NIC-) induced diabetes mellitus model. STZ is a glucosamine-nitrosourea derived from Streptomyces achromogenes (Gram-positive bacterium) and, it is used for the treatment of pancreatic beta cell carcinoma and to induce diabetes mellitus in rodents.  NIC was administered, followed by STZ injection to produce stable, moderate hyperglycemia and to prevent early inhibition of beta cell function by STZ, which may be helpful to reduce/prevent the incidence of diabetic coma caused by STZ.  STZ causes hyperglycemia after 2 h of injection, hypoglycemia in 6 h and finally hyperglycemia by decreasing the insulin levels through the inhibition/ destruction of pancreatic beta cell function. ,
The hydroalcoholic extract of O. tenuiflorum exhibited significant anti-diabetic and anti-hyperlipidemic activities against STZ- and NIC- induced diabetic rats at the dose levels of 250 and 500 mg/kg BW. The effect was comparable with glibenclamide but not superior to it. At the end of this study, glibenclamide reduced the glucose levels from 226.40 ± 8.33 to 112.80 ± 5.75, whereas O. tenuiflorum 500 mg/kg reduced the glucose levels form 229.80 ± 10.00 to 129.00 ± 13.20. O. tenuiflorum exhibited significant anti-diabetic effect but the effect was not superior than glibenclamide. This may be due to the amount of active phytoconstituents present in the plant. However, the individual phytoconstituents of O. tenuiflorum such as ursolic acid (derivatives) and rosmarinic acid are known to have anti-diabetic activities. ,
Severe hyperlipidemia was observed with STZ- and NIC- induced diabetic animals, and this may be due to exogenous fat loading, an abnormal increase in small intestinal acyl-coenzyme A: Cholesterol acyltransferase activity and enhancement of intestinal CoA-dependent esterification. , Both glibenclamide and O. tenuiflorum (at 250 and 500 mg/kg) reversed the STZ- and NIC- induced hyperlipidemia. However, the exact mechanism of action of anti-hyperlipidemic effect of O. tenuiflorum is unclear.
In diabetes mellitus control animals, liver and renal dysfunctions were observed. The increase in aminotransferase level may be due to the destruction of hepatocytes caused by STZ.  Decrease in serum albumin levels was observed in diabetes mellitus animals and this may be due to deterioration of kidney function.  Park et al. also reported that decreased levels of albumin in peripheral blood of STZ-induced diabetic rats.  Alteration in serum albumin: creatinine ratio was observed in diabetes mellitus control animal and O. tenuiflorum 150 mg/kg treated animals, and this may be due to the alteration in renal functions.
The increased absolute organ weight of liver was observed in diabetic animals, and this may be due to cellular damage in the liver because of increasing resistance to insulin signaling pathways in hepatocytes.  There was increased kidney weight: BW ratio (results were not significant) found in diabetes mellitus animals. This may be due to glomerular damage, changes in bradykinin system and increased gene expression of fibronectin and collagen I. , In vivo study revealed that hydroalcoholic extract of O. tenuiflorum possesses the anti-diabetic and anti-hyperlipidemic activities but not superior to it., but the effect was not dose dependently. This may be due to the time of collection of the plant parts, and the amount of phytoconstituents present in the plant.
Ocimum tenuiflorum is known to have many pharmacological activities and it is traditionally used as an anti-tussive agent. In this present investigation, we predicted the biological activities of phytoconstituents of O. tenuiflorum which indicated pharmacological actions as insulin promotor activity, anti-oxidant activity, free radical scavenging property, anti-neoplastic effect, hypolipidemic effect, etc., This plant is known to have anti-diabetic, cardioprotective, wound healing, anti-oxidant, hypolipidemic, anti-microbial, gastroprotective, immunomodulatory, anti-nociceptive and anti-cancer effects.  The whole plant may have different pharmacological effects at different doses, due to the variation in phytoconstituents and plant geographical location. Some of the individual phytoconstituents of O. tenuiflorum have anti-diabetic, anti-microbial, anti-cancer, gastroprotective, mucoprotective effects. Many of the listed predicted activities for the various phytoconstituents are under investigation. Hence further in silico, in vitro and in vivo pharmacological studies on O. tenuiflorum phytoconstituents may give new lead to the biomedical researchers.
| Conclusion|| |
Hydroalcoholic extract of leaves of O. tenuiflorum has significant anti-diabetic and anti-hyperlipidemic activities at 250 and 500 mg/kg BW against STZ and NIC − induced diabetes mellitus in rats. The anti-diabetic effect of hydroalcoholic extract of leaves of O. tenuiflorum is not dose dependent. The biological activity prediction of phytoconstituents of O. tenuiflorum showed "n" of biological activities which include anti-diabetic and anti-hyperlipidemic properties at 70% Pa: Pi level and toxicological effect prediction did not show any major harmful effects. Further studies are required to confirm the anti-diabetic and anti-hyperlipidemic activities of individual phytoconstituents of O. tenuiflorum, which showed the mentioned properties in computer aided prediction.
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[Table 1], [Table 2], [Table 3], [Table 4], [Table 5], [Table 6], [Table 7], [Table 8]