A REVIEW ON LAGERSTROEMIA SPECIOSA
HTML Full TextA REVIEW ON LAGERSTROEMIA SPECIOSA
Rajya Lakshmi Koduru*, P. Srinivasa Babu, I. Vikram Varma, G. Girija Kalyani and P. Nirmala
Department of Pharmaceutical Chemistry, Vignan Pharmacy College, Vadlamudi, Guntur - 522213, Andhra Pradesh, India.
ABSTRACT: Lagerstroemia speciosa is commonly known as crape myrtle belonging to the Lythraceae family. Lagerstroemia speciosa or Banaba is a medicinal tree traditionally used to lower blood sugar in the body. Its high content of corosolic acid makes it an effective anti-diabetic drug. Banaba is also recommended for kidney, bladder problems and hypertension. Leaves of the species have been traditionally used over thousands of years as folkloric treatment by the native Indians and Japanese for illness, ailments particularly for lowering blood sugar levels and weight loss. The flower extracts of the species has some pharmacological properties like antioxidant and anti-microbial activities, whereas fruit extracts reported anti-nociceptive, anti-diarrhea and cytotoxic activities. Research on leaf extracts reveals that anti-bacterial, anti-viral, anti-inflammatory, anti-obesity, anti-fibrotic, anti-diabetic and xanthine oxidase inhibition, diuretic, decongestant activities and roots are applied for treating mouth ulcers. In addition to that bark is used to relieve the abdominal pains. The species also has essential metals like sodium, potassium, iron, zinc and magnesium which were clinically proved. Thus these reviews will emphasis on the phyto-constituents and biological activities of the plant which will heal and cure mankind for healthy living.
Keywords: |
Lagerstroemia speciosa, Crape myrtle, Lythraceae, Anti-diabetic, Essential metals
INTRODUCTION: The family Lythraceae 1 consists of about 24 genera and nearly 500 species wide spread in the temperature regions. In India it is represented by 11 genera and about 45 species. This data shows that Lagerstroemia speciosa is spread all over the world. Lagerstroemia speciosa is belongs to the family Lythraceae. The genus Lagerstroemia was first described by Carlos Linnaeus.
The name Lagerstroemia was recognized by Magnus von Lagerstroem a Swedish naturalist who provided specimens from the east for Linnaeus. Indians commonly called it as “Pride of India” and also called as Giant crape myrtle 2, queens crape myrtle and banaba by Philippines. This tree is widely distributed in Philippines, India and Malaysia. Traditionally, leaves, bark and roots of Lagerstroemia Speciosa have been used in folk medicines and are remedy for various illness and ailments. Leaves have been used to treat diabetes mellitus 3 and serve as diuretic and decongestant. The red-orange leaves have high levels of corosolic acid that can reduce blood sugar. Its fresh leaves are also used as emergency tincture of wounds and sanitizing the surface of the skin.
Roots are used for treating mouth ulcers and bark is used as stimulant, relief of abdominal pains and febrifuge. Philippines consume the leaves of the Lagerstroemia Speciosa as herbal tea for lowering blood sugar level and reducing body weight. Because of its “insulin like principle” is used as a remedy for diabetes. Recently, GlucosolTM and Banabamin herbal products have been developed from Lagerstroemia Speciosa as an anti-diabetic drug.
Chemical Constituents: The chemical constituents 5 of Lagerstroemia Speciosa include corosoli acid 6, lageracetal, amyl alcohol, ellagic acid, gallic acid, 4- hydroxyl benzoic acid, beta sitosterol, 3,3,4-tri-O-methl ellagic acid, 3-O-methyl-3,4-methylene-dioxy ellagic acid, Asiatic acid, alphitolic acid, 3,31 –di-O- methyl ellagic acid, 3,4,31,41- tetra-O- methyl flavellagic acid, 31, 41-di-O-methl-3,4-metheledioxy flavellagic acid, 3-O-methyl ellagic acid, 6,7-dihydroxy coumarin, alanine, isoleucine, alpha amino butyric acid, ellagitannin 7 and methionine. This species also consists of metals like Iron, Magnesium, and Zinc 4.
Structures:
ELLAGITANNIN
Pharmacological Properties:
Anti Diabetic Activity and Hypoglycemic Activity: Custer 8 C. Deocaris et al., 2005 performed hypoglycemic activity of irradiated 80% ethanol extract of banaba leaves was tested on alloxan treated diabetic mice and they found significant decline in blood glucose levels within 1.5 hours.
William 9 V. Judy et al., 2003 screened anti diabetic activity of 80% w/w aqueous ethanol leaf extract from Lagerstroemia speciosa standardized to 1% corosolic acid (GlucosolTM). It has been demonstrated in a randomized clinical trial involving Type II diabetics and found that GlucosolTM in a soft gel capsule formulation showed a 30% decrease in blood glucose levels compared to a 20% reduction seen with dry powder filed hard gelatin capsule formulation, suggesting that the soft gel formulation has a better bioavailability than a dry powder formulation.
Amornnat Thuppia 10 et al., 2009 evaluated the hypoglycemic effect of water extract from leaves of Lagerstroemia speciosa in normal and streptozotocin (STZ) induced diabetic rats and found that water extract of leaves of Lagerstroemia speciosa can reduce fasting blood glucose of STZ induced diabetic rats.
Barun 11 Kanti Saha et al., 2009 studied the hypoglycemic effect of hot water extract of Lagerstroemia speciosa of leaves on chemically induced diabetes in rats. These studies thus strongly suggest that the hot water extract of Lagerstroemia speciosa attributed its prominent hypoglycemic activity on experimental diabetic rats through suppression of gluconeogenesis and stimulation of glucose oxidation using the pentose phosphate pathway.
Anti - Obesity Activity: Yuko 1, 3, 12 Suzuki et al., 1999 studied the anti-obesity of 5% hot water extract from banaba leaves and results suggest that banaba had a beneficial effect on obese female KK-AY mice.
Antiviral Activity: Nutan 13 et al., 2013 screened anti-HIV activity of aqueous and 50% ethanol extracts of leaves and stems of banaba by in vivo reporter gene based assays and found the novel anti-HIV activity of banaba because of presence of Gallic acid and ellagic acid through the inhibition of reverse transcriptase and HIV protease.
Choi 3 HJ, et al., 2010 tested for anti-human rhinoviruses (HRV) activity in HeLa cells, orobol 7-O-D-glucoside (O7G) isolated from Lagerstroemia speciosa leaves which showed broad-spectrum anti-HRV activity towards HRV of groups A and B.
Cytotoxic Activity: Fatema 14 Nasrin et al., 2012 performed evaluation of cytotoxic activity of methanol extract of Lagerstroemia Speciosa leaves and barks by brain shrimp lethality bioassay method. They found the considerable cytotoxic potency with methanol extract of leaves of L. Speciosa.
Antibacterial Activity: LMV Laruan 15 et al., 2013 studied phytochemical and antibacterial study of methanol extract of Lagerstroemia speciosa (L.) Pers. by a modified method of Kirby-Bauer technique. They found that the extract exhibited high anti bacterial activity against E. coli, Staphylococcus areus and Pseudomonas aeruginosa.
Anti-inflammatory Activity: Priya 16 TT et al., 2008 worked on the anti- inflammatory activity of ethyl acetate and ethanol leaf extract of Lagerstroemia Speciosa. It had been examined using the carrageenan-induced acute inflammation and formalin-induced chronic paw oedema assays. Ethyl acetate extracts significantly reduced inflammation in a dose dependent manner, which was not observed with ethanol extract for both the acute and chronic inflammatory models.
Anti nociceptive Activity: Ahosan Morshed 17, et al., 2010 screened antinociceptive activity of chloroform extract of bark of Lagerstroemia speciosa, using an acetic acid-induced gastric pain model in Swiss albino mice. They observed that L. Speciosa have potent antinociceptive activity.
Antimicrobial Activity: Asish Bhaumik 18, et al., 2014 studied the bioactive compounds of methanol, ethanol and chloroform extract of fruit of Lagerstroemia speciosa by agar well diffusion method using bacterial cultures, Staphylococcus auerus, Bacillus subtillus, Pseudomonas aeruginosa, Escherichia coli and fungal cultures Asperilgillus niger, Asperigillus flavus, Candida albicans. They found that all the extracts exhibited moderate to good anti-microbial activity against the test microorganisms.
Pavithra 19 G. M., et al., 2013 studied antimicrobial activity of methanol extract of flower of Lagerstroemia speciosa, using agar well diffusion method and found that extract was effective in inhibiting all test micro organisms (5 isolates of Streptococcus, 5 isolates of Staphylococcus aureus, Candida albicans and Cryptococcus neoformans).
Xanthine Oxidase Inhibition: Unno 3, 20 T et al., 2004 studied Xanthine oxidase on aqueous leaf extract of Lagerstroemia speciosa and found that extract having the inhibitory activity on Xanthine oxidase, suggesting its potential in preventing and treating hyperuricemia.
Anti-fibriotic activity: Prabhu 3, 21 VV, et al., 2010 screened the effect of ethanol leaf extract of Lagerstroemia speciosa on male albino wistar rats with liver fibrosis induced by carbon tetra chloride (CCl4) and confirmed the potent anti-fibriotic effect13.
Anti-oxidant Activity: Fatema 14 Nasrin et al., 2012 studied the anti-oxidant activity of methanolic extract of Lagerstroemia leaves and barks for their antioxidant activity and found significant anti-oxidant activity.
Syed Junaid 22 et al., 2013 screened anti-oxidant activity of methanol extract of dried seeds of Lagerstroemia speciosa and found a marked anti-oxidant activity of dried seed extract.
Pavithra 23 G.M, et al., 2013 studied antioxidant activity of methanol extract of flowers of Lagerstroemia speciosa by employing DPPH radical scavenging assay and observed considerable anti-oxidant activity of flower extracts.
Saumya 24 S M, et al., 2011 studied antioxidant activity of aqueous leaf extract of banaba extract by TEAC assay, superoxide, hydroxyl, hydrogen peroxide and nitric oxide radical scavenging activities and found potential antioxidant activity.
Pharmacognostic Study: Woratouch Thitikorn-pong 25 et al., 2011 studied the Pharmacognostic evaluation of leaves of Lagerstroemia speciosa and provided the important information for the correct identification and herbal standardization of Lagerstroemia speciosa leaves.
Vijayaraghavulu 26 sai saraswathi et al., 2011 studied the Pharmacognostic and preliminary Phytochemical study of Lagerstroemia speciosa leaves
Caligiani 2 et al., 2013 worked on a simple GC-MS method for the screening of betulinic, corosolic, maslinic, oleanolic and urosolic acid contents in commercial botanicals used as food supplement ingredients. They found that only Lagerstroemia speciosa was rich in maslinic acid.
CONCLUSION: Lagerstroemia speciosa is one of the wide spread species and has been used traditionally in folk medicine. Studies done on Lagerstroemia speciosa in the past 15 years revealed that, it is a natural plant insulin that has no side effects and more than 40 phytoconstituents like glycosides, flavones, ellagic acids, triterpenes and tannins are present in leaves, stem, flowers, fruit, bark and roots. Finally, concluding that the whole banaba tree from root to leaves and flower had a glucose lowering effect and could be used to fight against diabetes, obesity, kidney diseases, hypertension and others. Further research is needed to isolate new active principles and to screen pharmacological activities of the phytoconstituents.
ACKNOWLEDGEMENT: The author conveys deep sense of gratitude to the management of Vignan Pharmacy College for their continuous support and inspiration.
CONFLICT OF INTEREST: We declare that, there is no conflict of interest regarding the publication of this paper.
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How to cite this article:
Koduru RL, Babu PS, Varma IV, Kalyani GG and Nirmala P: A review on Lagerstroemia speciosa. Int J Pharm Sci Res 2017; 8(11): 4540-45.doi: 10.13040/IJPSR.0975-8232.8(11).4540-45.
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Article Information
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English
IJPSR
R. L. Koduru*, P. S. Babu, I. V. Varma, G. G. Kalyani and P. Nirmala
Department of Pharmaceutical Chemistry, Vignan Pharmacy College, Vadlamudi, Guntur, Andhra Pradesh, India.
drkrl3579@gmail.com
03 April, 2017
02 June, 2017
11 August, 2017
10.13040/IJPSR.0975-8232.8(11).4540-45
01 November, 2017