GC-MS ANALYSIS AND IN-VITRO CYTOTOXICITY STUDY OF DENDROPHTHOE FALCATA AND TRIDAX PROCUMBENS EXTRACTS AGAINST HACAT CELLS LINE
HTML Full TextGC-MS ANALYSIS AND IN-VITRO CYTOTOXICITY STUDY OF DENDROPHTHOE FALCATA AND TRIDAX PROCUMBENS EXTRACTS AGAINST HACAT CELLS LINE
V. C. A. Bhagat * and M. S. Kondawara
Department of Quality Assurance, Appasaheb Birnale College of Pharmacy, Sangli - 416416, Maharashtra, India.
ABSTRACT: The present study shows the cytotoxic effect of Dendrophthoe falcata (L. f) and Tridax procumbens Linn. extracts against HaCat (Skin cancer) cell line by MTT and SRB assay method. The phytochemical screening of extracts dichloromethane: methanol (DM), methanol: water (MW), and ethanol: water (EW) revealed the presence of secondary metabolites such as alkaloids, flavonoids, saponins, tannins, sterols, and triterpenes. % Cell inhibition by MTT assay of DFDM extract shows 90.00 ± 0.09% and TPDM 91.29 ± 0.02% at 80 µg/ml. IC50 values of DFDM extract <20 µg/ml and TPDM extract 20 µg/ml compare to IC50 values of standard 5-fluorouracil <10 µg/ml by MTT assay. SRB assay method DFDM extracts shows 86.96 ± 0.07% and TPDM shows 89.14 ± 0.27 with IC50 values < 20 µg/ml compare standard 5-fluorouracil <10µg/ml. HPTLC fingerprint analysis of active DFDM extract showed 11 peaks at 366 nm Rf values 0.06-0.87 & TPDM shows showed 12 peaks Rf values 0.33- 0.83 at 366 nm. Active extracts were analyzed agilent 7890A GC coupled with triple quadrupole mass detector. GC–MS analysis DFDM extract shows presence of the 16 phytocompounds, major are [Diethetyl phosphonate- (RT-6.615, 166.075, 43.8.%), Benzyl oxy tridecanoic acid (RT-6.730, MW-320.235, %A-44%), 9(2-phenyl ethyl) Heptadecane (RT-10.233, 344.344,29.1 %), Hexadecanoic acid butyl ester (RT-15.099, 312.302, 65.5%), Linoleic acid, 2,3 bis (O-TMS) propyl esters (RT-23.098,26.3%)]. TPDM extracts shows 19 phytocompounds, major are [Tetradecene (RT-8.249, 198.23, 32.8%), Cyclohexasulfide (RT-9.893, 191.83, 71.4%), Cyclic octaatomic sulphur (RT-15.810, 66.7%), Squalene (RT-22.081, 24.1%). The study showed that the phytochemicals present in the leaves extracts of D. falcata and T. Procumbens were responsible for cell inhibitory activity against the HaCat cell line.
Keywords: |
Cytotoxicity, HaCat, MTT, SRB assay, GC-MS, Bioactive compounds
INTRODUCTION: Medicinal plants provide thousands of phytomolecule which play a major inhibitory role against different pathogens. Nowadays these phytochemical used to treat the disease, chronic infections. From ancient time in Ayurveda, plant extracts and their formulations are used to treat diseases 1.
The WHO report shows that phytomolecule, herbal formulations were utilized by 60% of the world’s population and in some countries are incorporated extensively in the public health system 2. Pathogenic tumor cell always produces the resistance to the anticancer drugs which are used to treat the diseases 3.
Due to this problem, researchers are developing new synthetic molecules but having side effects, nowadays, new phytomolecule, secondary metabolites from plant origin are explored because of their diverse pharmacological activity 4. Phytomolecule such as alkaloids, glycosides, saponins, steroids, and triterpenoids, fat and oils, flavonoids, phenols, and tannins were recently used as drugs or to prevent various infections 5, few of the natural products were reported for the cytotoxic activity against various types of cancer cell lines 6. Dendrophthoe falcata (L. f) Ettingsh, hemiparasitic mistletoe belonging to Loranthaceae family, commonly known as ‘Banda’ green plant found in Asian countries India, Srilanka, Thailand, China, and Australia. The leaves, stem, flower parts were used to treat wounds, menstrual troubles, breathing problems, psychic disorders, pulmonary tuber-culosis, in consumption, and mania by the tribal of India 7. Phytochemical screening of Dendrophthoe falcata extracts reported containing several cardiac glycosides, flavonoids, and pentacyclic triterpenes 8. Research articles report that D. falcata also have possessed contraceptive, hepatoprotective, wound healing, anti-microbial, anti-oxidant, anti-nociceptive, antihyperlipidemic, cardioprotective, and also antitumor activities 9. D. falcata extracts also reported for lowering the breast tumor growth in the experimental female Wistar rats 10. Tridax procumbens from the family Asteraceae, known as ‘Coat buttons’ plant contains maximum natural cellulose fiber. Tridax procumbens is native of tropical America, tropical Asia, Africa, Australia, and India. It is a wild herb distributed throughout India 11. In the Indian traditional medicine system, T.procumbens used as an anticoagulant, antifungal hepatoprotective, and in dysentery 12, 13. Recent research on T. procumbens reports that the methanol extract exhibited high antifungal activity against clinically important human skin pathogens 14. The present study was done to find out the in-vitro cytotoxicity of D. falcata and T. Procumbens leaf extracts against HaCat (Skin cancer) cells line & carried out to profile of chemical compounds from active extracts.
MATERIALS AND METHODS:
Chemicals and Reagents: All the chemicals and reagents used in the research were of analytical grade and purchased from SD- Fine, Research-lab, Sigma-Aldrich (India), Silica gel 60 F 254 HPTLC aluminum sheets 20 × 20 cm, Merck KGaA, Germany.
Plant Material: Dendrophthoe falcata (L. f) a hemiparasite of Mangifera indica plant and Tridax procumbens plant leaves, were collected from the local region at flowering stage September - November from Bhor-Kapurhol road, Pune, Maharashtra, India. (Lat.-18012'51” N; Long-73054'35”E) and were taxonomically identified and authenticated by Dr. Rashami Dubey, Scientist Govt. of India, Botanical Survey of India (BSI), Pune, Maharashtra (India). The herbarium of plant specimen has been deposited at B.S.I Pune voucher specimen number- VIBTRP2 and VIBDEF3 BSI/WRC/TECH/2013.
Extraction: Shade dried leaves were powdered (1kg), Soxhlet extracted with dichloromethane: methanol (7:3), 70% (v/v) methanol & ethanol to get respective extracts. Extracts were vacuum concentrated by rotary evaporated under reduced pressure at 60 ºC ± 1 ºC. Extracts were dried in hot air oven at 40-45 ºC and then extracted was stored at - 20 ºC till bioevaluation in an air-tight container. Phytochemical screenings of extracts were carried out using phytochemical tests as described by Trease, G. E., Evans, and Harborne 15, 16.
High-Performance Thin Layer Chromatography (HPTLC) Analysis: Biologically active di-chloromethane: methanol extracts of D. Falcate (DFDM) and Tridax procumbens (TPDM) further studied by HPTLC. Fingerprint analysis performed by CAMAG HPTLC equipment consists of automatic & Linomat syringe using the Linomat applicator IV sample applicator, developing in CAMAG twin trough chamber. Evaluated by CAMAG HPTLC densitometer with win CATS planar chromatography manager software was used data collection. 5 mg of extract was dissolved in 10 ml of methanol. Silica gel 60 F254 and HPTLC aluminum sheets were used as adsorbents. 10 μl of the sample was applied as a band of 5-6 mm and at a separation of 6 mm from each other. Nitrogen gas was flushed on plates for simultaneous drying of bands. Flat bottomed CAMAG Twin chamber saturated with 10 ml of n-hexane: toluene: ethyl acetate (2: 4: 1.3) mobile phase before develop-pment. The developed plate was scanned using TLC scanner with WinCATS software.TLC plates were visualized and a fingerprint profile was photo-documented at 366 nm. Rf values were calculated & data reported 17.
GC-MS Analysis: GC-MS analysis of active extracts DFDM and TPDM studied by Agilent 7890A Gas Chromatography, Agilent 7000B Mass spectrophotometer (GC-MS) (USA) coupled with triple quadrupole mass spectrometer detector. The GC-MS system was equipped with a DB-5MS column (30 mm× 0.25 m 0.2-micron film Filter). Carrier gas Helium is used as at a flow rate of 1.0 mL/min and a splitless.
In temperature programming, initial temperature is 110 ºC (hold 2 min ramped at 15 °C / min to 150 °C (hold 1 min) ramped at 10 °C/min to 280 °C (hold 5 min), final experiments total run time 23.5 min. The injector and detector were held at 250 °C. Mass spectra were obtained by electron ionization (EI) at 70 eV, using a spectral range of m/z 50-700 amu 14, 19.
In-vitro Cytotoxicity Study:
MTT Assay:
Cell Culture: The HaCat cells line (Skin cancer) was procured from National Centre for Cell Science (NCCS), Pune, India. HaCat cells were grown & maintained as a monolayer in DMEM medium supplemented with 10% fetal bovine serum containing 5% of a mixture of Gentamycin(10 ug), Penicillin (100 Units/ ml), and Streptomycin (100 µg/ml) in the presence of 5% CO2 at 37 ºC. The cells were plated at a density of 1 × 104 cells per well in a 96-well plate and cultured for 24 h at 37 °C 20-22.
Assay: Cell viability was determined with 3-(4, 5-dimethyl thiazol-2-yl)-2, 5-diphenyl tetrazolium bromide (MTT) with minor modifications. This assay measures the conversion of MTT to dark blue formazan precipitation by succinate dehydrogenase of the intact mitochondria of living cells. HaCat cells line were seeded into 96-well plates at a density of 1 × 104 cells per well in DMEM (10% FBS) incubated for12 h. The extracts were firstly dissolved in dimethyl sulfoxide (DMSO) and then diluted in a culture medium with a final DMSO concentration of 0.5% (v/v).
After that, the cells were exposed 10, 20, 40 & 80 (μg/ml) concentrations appropriately diluted with DMSO and incubated at 37 ºC in a humidified atmosphere of 5% CO2. Medium containing 0.5% DMSO was used as control. After treatment, medium was replaced with a fresh culture medium without FBS containing MTT at a concentration of 0.5 mg/ml, and the cells were further incubated for 4 h at 37 °C. The optical density (OD) was measured at 490 nm using a microplate reader. The result represented the mean of three readings. Cell viability was determined by OD of treated wells divided by OD of vehicle control.
SRB Assay: For the present study, cells were inoculated into 96 well microtiter plates in 100 μl of individual cell lines by Sulforhodamine B (SRB) method. HaCat cells line maintained in DMEM medium supplemented with 10 % fetal bovine serum. The cells were consequently expose to 10, 20, 40, & 80 µg/ml concentrations of extracts. After extracts incubation, add 50 µl TCA (50%) and kept for 1 hour at 4 ºC, then plate washed with triple distilled water and dried the plate. Then add 100 µl SRB dyes in each well and kept for 30 min at room temperature. Again wash three times with 1% acetic acid and air dry the plate, then add 200 µL tris buffer, and absorbance was read at 490 nm. Percent growth was calculated on a plate-by-plate basis for test wells relative to control wells 23, 24.
Percent cytotoxicity = Reading of control - Reading of treated cells/ Reading control × 100
RESULTS AND DISCUSSION:
Extraction and Phytochemical Screening: Phyto-chemical extraction plant was performed by different polarity solvents by soxhlet apparatus. From three batches of around 1 kg of air-dried powdered leaves, mean percentage yields of DFDM -8.40% (SD = 1.34), DFMW-5.8% (SD = 1.02), DFEW-7.2% (SD = 1.11) and for TPDM-9.1% (SD = 1.07), TPMW- 5.2% (SD = 0.63), TPEW-6.4% (SD = 1.04) Most of the constituents were polar in nature. DFDM & TPDM extracts showed the presence of phytochemicals such as alkaloids, flavonoids, phenolic compound tannins, saponins, phytosterols, and diterpenes.
Alkaloids extracted from plants show biological activities such antimicrobial 25, antitumor, and antiviral activities 26. Saponins from plants show good antioxidant, immunostimulant, anticancer activity and also act on the permeability of cell membranes by the pore formation make lysis of the cell. Triterpenoids saponins are potent cytotoxic acts through cell membrane mediated transport 27. Phytochemicals such as steroids, alkaloids, phenols, flavonoids, saponins, tannins, anthro-quinone potent antibacterial, anticancer agents 28.
HPTLC Fingerprints Study of Extract of Dendrophthoe falcata (L. f) and Tridax Procumbens (Linn.) Plant: The HPTLC fingerprints study of DFDM extract showed 12 peaks at 366 nm with Rf values 0.06-0.87 TPDM extract showed 13 peaks with Rf values 0.33- 0.83, at 366 nm showed maximum concentration justifies the presence of phytochemicals may be responsible for biological activity.
FIG. 1: HPTLC CHROMATOGRAM OF DFDM EXTRACT OF MEASURED AT 366 nm
FIG. 2: HPTLC CHROMATOGRAM OF TPDM EXTRACT MEASURED AT 366 nm
GC-MS Analysis of DFDM and TPDM Extracts: GC-MS analysis of extracts of D. falcata (L. f) and T. procumbens (Linn.) revealed the presence of bioactive compounds. DFDM extract showed 16 peaks Fig. 3, Table 1, Fig. 4 and TPDM extracts showed 19 Fig. 5, Table. The compounds were identified using the NIST database. The identification of the chemical compounds was confirmed based on the retention time; molecular formula, molecular weight, and peak area in percentage were detected.
The major bioactive components of DFDM extract were identified as Diethyl ethyl phosphonate (43.8%), Benzyl-oxy tridecanoic acid (44.1%), 9(2-phenyl ethyl) Heptadecane (29.1%),Phytol acetate(16.8%), 1,1-dipheyl -4-phenyl thiobut-3-en-1-ol(14.3%), Octadecane 3-ethyl-5-(2-ethyl butyl) (23.0%), Hexadecanoic acid butyl ester (65.5%), Heptacosane (24.2%), Squalene (17.5%), Linoleic acid, 2, 3 bis (O-TMS) propyl esters (26.3%). Major bioactive components of TPDM extract were Tetradecene (32.80%), Acoradiene (14.30 %), 2, 4-Di-tert-butylphenol (Antioxidant No.33%) (29.30 %), Cyclohexasulfide (Hexathiane) (71.4%), Hexadecane (26.4%), 7-methyl-Z-tetradecane-1-ol-acetate (30.3%), Cyclic Octaatomic sulfur (66.7%), Octadecane, 3-ethyl -5-(2-ethyl butyl)(28.4%), Squalene(24.1%) These bioactive compounds have been reported. Phytochemical bioactive compounds play essential roles in against diseases and general metabolisms.
Sulfur molecules involved in G2/M arrest and apoptosis of cell and activation of p53 pathway in response to the oxidative DNA damage of cancer cell. Sulfides inhibit the growth of skin cancer cells with respect to normal keratinocyte HaCat cells 29. GC-MS study of DFDM & TPDM reveals the presence of squalene which was reported that antioxidant triterpene act by oxygen scavenging activities (withdraws or donate electron from molecule). Squalene was a good antitumor agent act via the strong inhibitory activity of HMG-COA reductase catalytic activity 30.
Review from past research indicates that major components separated from DFDM and TPDM extracts by GC-MS may be responsible for cytotoxicity.
FIG. 3: GC-MS SPECTRA OF DFDM EXTRACT
TABLE 1: PHYTOCHEMICAL COMPONENTS OF DFDM EXTRACT USING GC–MS
S. no. | RT (min) | Name of Compounds | MF | MW (g/mol) | PA (%) |
1 | 6.335 | Carbonic acid ethyl hexadecyl ester | C19H38O3 | 314.282 | 7.59 |
2 | 6.615 | Diethyl ethyl phosphonate | C16H15O3P | 166.075 | 43.8 |
3 | 6.730 | Benzyl-oxy tridecanoic acid | C20H32O3 | 320.235 | 44.1 |
4 | 8.890 | Dicloroactic acid 4-Hexadecyl ester | C18H34Cl2O2 | 352.193 | 5.79 |
5 | 10.233 | 9-(2-phenyl ethyl) Heptadecane | C25H44 | 344.344 | 29.1 |
6 | 10.825 | Docosyl ethyl carbonate | C25H50O3 | 398.375 | 7.0 |
7 | 11.693 | Phytol acetate | C22H42O2 | 338.318 | 16.8 |
8 | 12.921 | 1,1-dipheyl -4-phenyl thiobut-3-en-1-ol | C22H20OS | 332.123 | 14.3 |
9 | 14.545 | Octadecane 3-ethyl-5-(2-ethyl butyl) | C26H54 | 366.422 | 23.0 |
10 | 15.099 | Hexadecanoic acid butyl ester | C20H40O2 | 312.302 | 65.5 |
11 | 16.343 | Methyl 14-methyl eicosanoate | C22H44O2 | 340.334 | 16.9 |
12 | 18.012 | Di-n-octyl phthalate | C24H38O4 | 390.2.77 | 19.9 |
13 | 19.338 | Heptacosane | C27H56 | 380.438 | 24.2 |
14 | 20.392 | Squalene | C30H50 | 410.391 | 17.5 |
15 | 21.784 | 1,1,3,3,5,5,7,7,9,9,11,11,13,13 tertadecamethyl Heptasiloxane | C14H44O6Si7 | 504.152 | 18.4 |
16 | 23.098 | Linoleic acid ,2,3 bis(O-TMS)propyl esters | C27H54O7Si2 | 498.356 | 26.3 |
RT = retention time; MF = molecular formula; MW = molecular weight; PA = peak area
FIG. 4: PHYTOCHEMICAL COMPONENTS OF DENDROPHTHOE FALCATA DFDM EXTRACT
FIG. 5: GC-MS SPECTRA OF TPDM EXTRACT
TABLE 2: PHYTOCHEMICAL COMPONENTS OF TPDM EXTRACT USING GC–MS
S. no. | RT (min) | Name of compound | MF | MW (g/mol) | PA (%) |
1 | 6.001 | Dodecane | C12H26 | 170.20 | 07.94 |
2 | 8.149 | 7-Tetradecene(Z) | C14H28 | 196.21 | 05.03 |
3 | 8.249 | Tetradecene | C14H30 | 198.23 | 32.80 |
4 | 9.192 | Acoradiene | C15H24 | 204.18 | 14.30 |
5 | 9.348 | 2-Bromotetradecane | C14H29Br | 276.39 | 11.2 |
6 | 9.394 | 7-Hexadecene(Z) | C16H32 | 224.25 | 4.77 |
7 | 9.490 | Pentadecane | C15H32 | 212.25 | 10.7 |
8 | 9.564 | 2,4-Di-tert-butylphenol (Antioxidant No.33 ) | C14H22 | 206.16 | 29.30 |
9 | 9.893 | Cyclohexasulfide(Hexathiane ) | S6 | 191.83 | 71.40 |
10 | 10.616 | Centene(1-hexadecane ) | C16H32 | 224.25 | 5.09 |
11 | 10.706 | Hexadecane | C16H34 | 226.26 | 26.4 |
12 | 13.699 | 7-methyl-Z-tetradecane-1-ol-acetate | C17H32O2 | 268.24 | 30.30 |
13 | 15.689 | Neronine,4β,dihydro | C18H21 NO6 | 347.13 | 9.30 |
14 | 15.810 | Cyclic Octaatomic sulfur | S8 | 255.76 | 66.7 |
15 | 16.230 | Octadecane,3-ethyl -5-(2-ethyl butyl) | C26H54 | 366.42 | 28.4 |
16 | 16.877 | 17-Pentatricontene | C35H70 | 490.54 | 27.4 |
17 | 19.695 | 9-(2’,2’-Dimethyl propanoilhydrazono) -3,6-dichloro-2,7-bis-[2-(diethylamino)-ethoxy]fluorene | C30H42Cl2N4O3 | 576.22 | 47.8 |
18 | 22.081 | Squalene | C30H50 | 410.39 | 24.1 |
19 | 23.019 | Heptacosane,1cholro | C27H55Cl | 414.39 | 11.5 |
FIG. 6: PHYTOCHEMICAL COMPONENTS OF TRIDAX PROCUMBENS (TPDM EXTRACT)
Cytotoxicity Assay: The cytotoxic effect of Dendrophthoe falcata and Tridax procumbens plant extracts against HaCat (Skin cancer) cells with increasing concentrations of (10–80 μg/mL) for 24 h, which was confirmed by MTT and SRB assay.
The result shows that DFDM & TPDM extracts significantly induce cytotoxicity in a dose dependent manner Fig. 7 and 8. DFDM extracts shows cell inhibition 90.00 ± 0.09% & TPDM shows 91.29 ± 0.02% at 80 µg/ml. Both extracts shows strong cells inhabitation activity with IC50 values <20 µg/ml, 20 µg/ml respectively by MTT assay. The cell viability was gradually decreased, when treated with concentration of 10, 20, 40 & 80μg/ml. Simultaneously by SRB assay method DFDM extracts shows cell inhibition 86.96 ± 0.07% and TPDM shows 89.14 ± 0.27 with IC50 values < 20 µg/ml compare to IC50 values of std 5-fluorouracil <10µg/ml Table 5.
TABLE 5: IC50 VALUES (µG/ML) OF DENDROPHTHOE FALCATA AND TRIDAX PROCUMBENS PLANT EXTRACTS AGAINST HACAT CELLS LINE BY MTT AND SRB ASSAY
S. no. | Compounds/Extracts | MTT Assay | SRB Assay |
IC50 Values (µg/ml) | |||
1 | Negative control | 00 | 00 |
2 | 5-fluorouracil(Std.) | < 10 | < 10 |
3 | DFDM | < 20 | < 20 |
4 | DFMW | > 40 | < 40 |
5 | DFEW | > 40 | < 40 |
6 | TPDM | 20 | < 20 |
7 | TPMW | > 40 | 40 |
8 | TPEW | < 40 | < 40 |
CONCLUSION: The present study demonstrated that DFDM and TPDM extract exhibits strong cell inhibition effects on HaCat (Skin cancer) cells line by MTT and SRB assay. HPTLC and GC-MS study shows the presence of phytochemicals such as hexadecanoic acid butyl ester, Tetradecene, Squalene, Cyclic Octaatomic sulfur that may inhibit cells growths by increased intracellular reactive oxygen species (ROS) generation and decreased mitochondrial membrane potential also apoptosis of cells by the oxidative DNA damage. Reviews of research explore that DFDM and TPDM extracts have potent anticancer properties against the HaCat cells line. Present bioactive compounds were responsible for anticancer activity.
ACKNOWLEDGEMENT: The authors are thankful to Dr. Sandeep Patil's‘ BIOCYTE’ laboratory. Sangli, Maharashtra, India for cytotoxicity studies. The authors are thankful to Poona College of Pharmacy, Pune, M. S, India, for HPTLC, GC-MS instrumentation facility.
CONFLICTS OF INTEREST: Authors declares no conflicts of interest
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How to cite this article:
Bhagat VCA and Kondawara MS: GC-MS analysis and in-vitro cytotoxicity study of Dendrophthoe falcata and Tridax procumbens extracts against hacat cells line. Int J Pharm Sci & Res 2021; 12(4): 2175-84. doi: 10.13040/IJPSR.0975-8232.12(4).2175-84.
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Article Information
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2175-2184
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English
IJPSR
V. C. A. Bhagat * and M. S. Kondawara
Department of Quality Assurance, Appasaheb Birnale College of Pharmacy, Sangli, Maharashtra, India.
vishwasbhagat@rediffmail.com
03 April 2020
27 July 2020
16 August 2020
10.13040/IJPSR.0975-8232.12(4).2175-84
01 April 2021