| Literature DB >> 30733792 |
Rathinavel Thirumalaisamy1,2, Subramanian Ammashi2, Govarthanan Muthusamy3.
Abstract
Anti-inflammatory phytocompounds from Crateva adansonii DC leaf extracts were identified by GCMS analysis and its anti-inflammatory potential was evaluated by in silico molecular docking study against inflammatory molecular targets. Three different (Aqueous, Methanol and Petroleum ether) dried leaf extracts of Crateva adansonii were obtained from soxhlet extraction method. Preliminary phytoconstituents analysis of three different leaf extracts of C. adansonii confirmed the presence of various major classes of bioactive phytoconstituents such as polyphenols (tannins and flavonoids), steroids, alkaloid, coumarin, carbohydrate and terpenoids. Among three leaf extracts, methanolic leaf extract possess highest total phenolic content of 77 ± 1.65 µg gallic acid equivalent (GAE)/g of dry weight of leaf extract, subsequently methanolic leaf extract also shows maximal in vitro antioxidant activity (DPPH scavenging activity) of 71.22 ± 1.32% among three different leaf extracts. GC-MS analysis of petroleum ether leaf extract revealed the presence of nine phytocompounds representing 95.43% peak area percentage, among nine identified phytocompounds three phytocompounds of C. adansonii possess anti-inflammatory property namely phytol, 1-Hexyl-2-Nitrohexane and 2-Isopropyl-5-Methylcyclohexyl 3-(1-(4-Chlorophenyl)-3-Oxobutyl)-Coumarin-4-Yl Carbonate were chosen for in silico molecular docking study against four inflammatory receptor targets (COX-2, TNFα, IL-1β and IL-6) and they shows less binding energy with highest docking score ranging from -15.9500 to 5.0869. The present study substantially indicated and proven that anti-inflammatory potential of phytocompounds from C. adansonii leaf extracts which can be exploited for commercial designing of novel anti-inflammatory drug to treat various inflammatory disorders.Entities:
Keywords: Anti-inflammatory phytocompounds; Crateva adansonii; Cyclooxygenase-2; Inteeleukin-1β; Phytol; Tumor necrosis factor α
Year: 2018 PMID: 30733792 PMCID: PMC6354007 DOI: 10.1016/j.jgeb.2018.03.004
Source DB: PubMed Journal: J Genet Eng Biotechnol ISSN: 1687-157X
Preliminary phytochemical screening of the plant Crateva adansonii different leaves extracts.
| Plant Extract | Test | AE | ME | PE |
|---|---|---|---|---|
| Alkaloid | Mayer’s and Wagner’s test | |||
| Flavonoid | Ammonia test, Alkaline reagent test | + | ||
| Tannin | Ferric chloride test, Lead acetate test | ++ | + | + |
| Phlobatannin | Hydrochloric acid test | + | + | + |
| Saponin | Frothing test | − | − | + |
| Terpenoid | Salkowski test | + | + | + |
| Anthraquinone | Ammonia test | + | − | + |
| Cardiac Glycoside | Keller | ++ | + | − |
| Coumarin | Sodium Hydroxide test | + | + | ++ |
| Steroid | Liebermann’s test, Salkowski’s test | + | ++ | + |
| Carbohydrate | Molisch’s test | + | + | + |
| Protein | Ninhydrin test | ++ | + | − |
Legend: AE-Aqueous leaf Extract; ME- Methanolic leaf Extract; PE- Petroleum ether leaf Extract; − Negative; + Positive.
Total phenolic content of the plant Crateva adansonii different leaves extracts.
| Plant extracts | Total phenolic content µg GAE/g of extract |
|---|---|
| Aqueous Extract | 34.77 |
| Methanol Extract | 42.77 |
| Petroleum Ether Extract | 29.38 |
Data are presented as the mean ± SD values of triplicate determinations.
Fig. 1Total phenolic content of the Crateva adansonii leaf extracts.
DPPH radical scavenging activity assay of reference standards Ascorbic acid and different leaves extract of Crateva adasonii.
| Reference Standard & Plant Extracts | DPPH (% Inhibition) | IC50 | ||||
|---|---|---|---|---|---|---|
| Concentration (μg/ml) | ||||||
| 10 | 20 | 40 | 80 | 160 | ||
| Ascorbic acid | 37.42 ± 0.74c | 50.74 ± 1.30d | 62.37 ± 0.90e | 75.84 ± 1.39e | 88.44 ± 1.23e | 19.75 |
| Aqueous Extract | 15.64 ± 1.38a | 23.51 ± 0.60b | 34.52 ± 1.87c | 43.38 ± 0.95c | 62.92 ± 1.25e | 102.50 |
| Methanol Extract | 18.69 ± 0.49a | 27.39 ± 0.96b | 36.12 ± 1.78c | 54.88 ± 2.26d | 71.22 ± 1.32e | 72.50 |
| Petroleum ether Extract | 13.32 ± 0.98a | 19.59 ± 1.23b | 25.91 ± 1.73b | 35.53 ± 0.82c | 53.20 ± 0.87d | 144.25 |
Data are presented as the mean ± SD values of triplicate determinations. a–d Different superscript letters for a given value within a column are significantly different from each other (Tukeyis-HSD multiple range post hoc test, p < 0.05).
Fig. 2Invitro Antioxidant activity by DPPH radical scavenging activity assay of reference standard ascorbic acid and Crateva adansonii leaves extracts.
Phytocomponents identified in the petroleum ether extract of the leaves of Crateva adansonii by GC -MS.
| RT | Name of the Compound | Peak Area% | MW | MF | |
|---|---|---|---|---|---|
| 1 | 18.915 | Phytol | 21.502 | 296 | C20H40O |
| 2 | 21.196 | Heptacosane | 3.332 | 380 | C27H56 |
| 3 | 23.442 | Tetratricontane | 5.008 | 478 | C34H70 |
| 4 | 26.113 | Tetratetracontane | 11.123 | 618 | C44H90 |
| 5 | 27.573 | Nonacosane | 11.262 | 408 | C29H60 |
| 6 | 27.793 | 1-Hexyl-2-Nitro cyclohexane | 3.354 | 213 | C12H23O2N |
| 7 | 28.219 | 2-Isopropyl-5-Methylcyclohexyl 3-(1-(4-Chlorophenyl)-3-Oxobutyl)-Coumarin-4-Yl Carbonate | 25.290 | 524 | C30H33O6Cl |
| 8 | 28.464 | Docosane 1,22- Dibromo | 4.404 | 466 | C22H44Br2 |
| 9 | 29.004 | 1-Hexyl-2-Nitrohexane | 10.186 | 213 | C12H23O2N |
Legend: RT- retention Time, MW- Molecular Weight, MF – Molecular Formula.
Fig. 3GCMS Chromatogram of Petroleum ether leaf extract of Crateva adansonii.
Biological activity and uses of phytoconstituents identified in Crateva adansonii petroleum ether leaf extract by GC–MS.
| Name of the compound | Compound nature | Biological activity/Uses | |
|---|---|---|---|
| 1 | Phytol | Diterpene alcohol | Precursor for manufacture of Vitamin E |
| 2 | Heptacosane | Aliphatic | Antibacterial activity |
| 3 | Tetratricontane | Alkane | Antifungal, antibacterial, antioxidant activity |
| 4 | Tetratetracontane | Alkane | Promoted an effective action in bacterial reduction with the application of laser energy |
| 5 | Nonacosane | Aliphatic | Antibacterial, Pheromone of female |
| 6 | 1-Hexyl-2-Nitro cyclohexane | Ketone | Neuroactive, anti-inflammatory, analgesic Property |
| 7 | 2-Isopropyl-5-Methylcyclohexyl 3-(1-(4-Chlorophenyl)-3-Oxobutyl)-Coumarin-4-Yl Carbonate | Benzopyrone | Antioxidant, antimicrobial and anti-inflammatory activity |
| 8 | Docosane 1,22- Dibromo | Alkane | Antibacterial activity |
| 9 | 1-Hexyl-2-Nitrohexane | Ketone | No activity Reported |
Fig. 4Docking Score and molecular interactions of anti-inflammatory phytocompounds of C. adansonii leaf extract against COX-2 inflammatory enzyme target.
Fig. 5Docking Score and molecular interactions of anti-inflammatory phytocompounds of C. adansonii leaf extract against TNFα inflammatory protein target.
Fig. 6Docking Score of anti-inflammatory phytocompounds of C. adansonii leaf extract against IL-1β inflammatory protein target.
Fig. 7Docking Score of anti-inflammatory phytocompounds of C. adansonii leaf extract against IL-6 inflammatory protein target.
Docking Score of Anti-inflammatory phytocompounds from petroleum ether leaf extract of C.adansonii with four inflammatory receptor targets.
| Phytocompounds | Binding Affinity KJ /mol | ||||
|---|---|---|---|---|---|
| COX-2 | TNF-α | IL-1β | IL-6 | ||
| 1. | Phytol | 3.5892 | −0.2050 | −0.6714 | 5.0869 |
| 2. | 1-Hexyl-2-Nitro cyclohexane | −2.7203 | 0.5389 | −1.8360 | −15.9500 |
| 3. | 2-Isopropyl-5-Methylcyclohexyl 3-(1-(4-Chlorophenyl)-3-Oxobutyl)-Coumarin-4-Yl Carbonate | 2.2327 | −6.3875 | −4.2663 | −3.4091 |
Molecular interactions of Anti-inflammatory phytocompounds from petroleum ether leaf extract of C.adansonii with four inflammatory receptor targets.
| Inflammatory Receptor Targets | Phytocompounds of | |||
|---|---|---|---|---|
| PHY | HEX | ISO | ||
| 1. | COX-2 | Asn87, Thr88, Tyr91, Phe96, Pro514 & #Asn87 | #Lys97*, Gly354, Tyr355, His356 & Lys358 | Thr88, Asn89, His90, Tyr91, Thr94, #His 95*, Lys511, Arg513 & Pro514 |
| 2. | TNF-α | Tyr 59, #Tyr 119*, Leu 120, Gly121 & Tyr 151 | Tyr119, Leu120 & #Gly121* | Tyr59, Ser60*, Tyr119, #Leu120*, Gly121 & Tyr151 |
| 3. | IL-1β | Tyr24, Glu25, Leu26*, Leu80, Gln81, Ser84 & Val132* | Tyr24, Glu25, Leu80, Gln81 & Leu82* | Tyr24, Glu25, Thr79, Leu80, #Gln81*, Leu82* & Glu83 |
| 4. | IL-6 | Lys27, Arg30, #Tyr31* & Asp34 | #Arg168* & Lys171* | Tyr31, Asp34, Gly35, Ala38, #Gln111* & Val115 |
Legend: *Hbond residues; #* Hbond & non bonded interaction; PHY- Phytol; HEX-1-Hexyl-2-Nitro cyclohexane; ISO -2-Isopropyl-5-Methylcyclohexyl 3-(1-(4-Chlorophenyl)-3-Oxobutyl)-Coumarin-4-Yl Carbonate.