International Journal of Pharmacy and Pharmaceutical Sciences
ISSN- 0975-1491 Vol 3, Suppl 2, 2011
Research Article
INVITRO ANTICANCER ACTIVITY OF RUBIA CORDIFOLIA AGAINST HELA AND HEP2 CELL
LINES
PARAG R. PATEL1*, AKHIL A. NAGAR1, RIKIN C. PATEL1, DHARA K. RATHOD1, VISHAL R. PATEL2
1
Parul Institute of Pharmacy 2Baroda College of Pharmacy, Limda, Vadodara, India.Email: p4pharmacy@yahoo.co.in
Received: 28 Oct 2010, Revised and Accepted: 29 Nov 2010
ABSTRACT
Cancer is the most devastating disease and leading cause of death throughout the world. Natural drugs are under investigation for their selective
cytotoxicity to cancer cells. Methanol fraction of Rubia cordifolia extract exhibited potent inhibition of Human cervical cancer cell line and Human
larynx carcinoma cell line while was found to be less cytotoxic against normal human kidney cells displaying safety for normal cells. Rubia cordifolia
can be a source of potent pharmacophore for treatment of disease like cancer.
Keywords: Rubia cordifolia, Cell line, Anticancer
INTRODUCTION and passed through sieve number 14. It was stored in an airtight
container.
Rubia cordifolia (Rubiaceae), also known as Indian Madder or
Manjisthais is traditionally used as anti inflammatory, antiseptic and Extraction and fractionation procedure
galactopurifier but its anticancer property is not known. Cancer is a
500 g of dried powder of Rubia cordifolia was soaked into ethanol
dreadful disease and any practical solution in combating this disease
and boiled at 80ºC for 3 hours to get crude ethanol extracts. The
is of paramount importance to public health1. Plants have been used
extract was then filtered through cotton followed by Whatman No.1
as folk remedies and ethno botanical literature has described the
filter paper and the filtrate thus obtained was concentrated at 40ºC
usage of plant extracts. There is an increasing need for search of new
with a rotary evaporator (Rotaver). The concentrated extract was
compounds with cytotoxic activity as the treatment of cancer with
dried residue. The yield of the extract was 38.4 g. The crude extract
the available anticancer drugs is often unsatisfactory due to the
was then dissolved in 10% water in methanol (100 ml) and
problem cytotoxicity to the normal cells. For the last few decades,
partitioned between pet ether (2.8 g), dichloromethane (4.2 g) and
phytochemical examination has been making rapid progress and
methanol fractions (22.9 g) 3
.
herbal products are becoming popular as sources of possible
anticancer compounds2.
Experimental design
MATERIALS AND METHODS
A cytotoxicity property of extracts of roots of Rubia Cordifolia was
carried out by XTT method against HEK293, HeLa, and HEp 2 cell
Reagents
lines. 2 mg of each plant extract was dissolved in 200µl of DMSO
Trypan blue (Hyclone), Triton X100 (MP Biomedicals), DMSO cell (dimethyl sulfoxide) then 100µl of this solution was diluted to 10ml
culture grade (MP Biomedicals), Sodium bicarbonate (MP with DMEM (Dulbecoos Modified Eagels medium, low glucose with
Biomedicals), HYQ® Antibiotic/Antimycotic solution, 100X (10000 glutamine). Thus, final concentration of this stock solution was
U/ml Penicillin G,10000µg/ml Streptomycin, 25 µg/ml 100µg/ml. Then by serial dilution varying concentrations were
Amphotericin B) (Hyclone), Penicillin and Streptomycin solution prepared from the stock solution. Thus the concentrations of the
(MP Biomedicals), EDTA (MP Biomedicals), HYQ® DPBS/modified solutions obtained were 100 µg/ml, 33.33 µg/ml, 11.11 µg/ml, 3.70
1X (Dulbecoo s phosphate buffer saline without Ca+ & Mg+) µg/ml, 1.23 µg/ml, 0.411 µg/ml, 0.137 µg/ml, 0.045 µg/ml, 0.015
(Hyclone), 0.25% Trypsin 1X (Invitrogen), Cyclophosphamide µg/ml, 0.005 µg/ml. 2 mg of Cyclophosphamide monohydrate
monohydrate (MP Biomedicals), HBSS 1X (Hank s Balanced Salt (served as the positive control) was dissolved in 200µl of DMSO
solution) (Hyclone), Cell proliferation kit (XTT) 2500 tests (Roche), (dimethyl sulfoxide) then 100µl of this solution was diluted to 10ml
Ethanol, Methanol, Petroleum ether, Dichloromethane with DMEM (Dulbecoos Modified Eagels medium, low glucose with
glutamine). Thus, final concentration of this stock solution was
Media
100µg/ml. Then by serial dilution varying concentrations were
prepared from the stock solution. Thus the concentrations of the
DMEM (Dulbecoos Modified Eagels medium, low glucose with
solutions obtained were 100 µg/ml, 33.33 µg/ml, 11.11 µg/ml, 3.70
glutamine) (US Biological), RPMI1640 (with L glutamine) (Hyclone,),
µg/ml, 1.23 µg/ml, 0.411 µg/ml, 0.137 µg/ml, 0.045 µg/ml, 0.015
FBS (Fetal Bovine Serum, South American origin) (Bioclot), HYQ®
µg/ml, 0.005 µg/ml. As for negative control 100µl of DMSO was
SFM HEK 293TM (Hyclone)
diluted to 10 ml with DMEM (Dulbecoos Modified Eagels medium,
Cell lines
low glucose with glutamine 3
.
HEK 293 (Human Epithelial Kidney cell line), HeLa (Human cervical
Cells were preincubated at a concentration of 1× 106 cells/ml in
cancer cell line), HEp 2 (Human larynx carcinoma cell line), all cell
culture medium for 3 h at 37°C and 5% CO . Cells were seeded at a
2
lines were purchased from NCCS: National Center for Cell Science,
concentration of 5× 104 cells/well in 100 µl culture medium and
Pune.
various amounts of compound (final concentration e.g. 100µM
0.005µM) into microplates (tissue culture grade, 96 wells, flat
Collection and preparation of plant material
bottom). Cell cultures were incubated for 24 h at 37°C and 5% CO .
2
The plant sample (roots) of Rubia cordifolia was purchased from 50 µl XTT labeling mixture was added and incubated for 18 h at 37°C
Yucca enterprise, Mumbai. For taxonomical identification, it was
and 6.5% CO . The spectrophotometrical absorbance of the samples
2
authenticated by Mr. V.R.Patel (Dept. of Pharmacognosy, Baroda
was measured using a microplate (ELISA) reader. The wavelength to
college of Pharmacy, Vadodara). After proper identification, the
measure absorbance of the formazan product was 450 nm according
plant samples were cut into small pieces followed by dried and
to the filters available for the ELISA reader, used. The reference
grinded into coarse powder by using high capacity grinding machine
wavelength was more than 650 nm4, 5
.
Patel et al.
Int J Pharm Pharm Sci, Vol 3, Suppl 2, 2011, 7071
All experiments were performed using three wells for each źg/ml to 100 źg/ml. The IC values are given in table 1. Graphical
50
concentration of each compound tested. The cytotoxicity data was representation is shown in figure 1.
standardized by determining absorbance and calculating the
correspondent compound concentrations. Dose response curve was
Table 1: IC values (µg/ml) of standard Cyclophosphamide
50
developed for each concentration of each compound tested. IC
50
monohydrate and three different extracts of Rubia cordifolia
value was determined for each concentration of each compound
(Rubiaceae) against HEK293, HEp2 and HeLa cell lines.
tested 6
.
Sample IC VALUES (µg/ml)
50
RESULTS AND DISCUSSION
CELL LINES USED
In this in vitro cytotoxicity assay, the root extract of Rubia cordifolia,
HEK293 HeLa HEp2
exhibited significant cytotoxic activity against HEp 2 cell line with
Cyclophosphamide >100 3.63 4.81
IC50 values of 11.92 źg/ml, 21.44 źg/ml and 29.02 źg/ml for
monohydrate*
methanol fraction, pet ether fraction and dichloromethane fraction
Dichloromethane >100 48.87 29.02
respectively, where good cytotoxicity were shown against HeLa cell
fraction
line with IC50 values of 23.12 źg/ml, 38.13 źg/ml, 48.87 źg/ml for
Methanol fraction >100 23.12 11.92
methanol fraction, pet ether fraction and dichloromethane fraction
Pet ether fraction >100 38.13 21.44
respectively. None of the fraction of the extract was found to be
cytotoxic against HEK293 cell line in the concentration range of 0.05 *(Positive control)
Pet-ether fraction
HEp2
Methanol fraction
Dichloromethane fraction
Cyclophosphamide
HeLa
monohydrate
0 10 20 30 40 50 60
IC50 values (µg/ml)
Fig.1: Graphical representation of IC values (µg/ml) of standard Cyclophosphamide monohydrate and three different extracts of Rubia
50
cordifolia (Rubiaceae) against HEp2 and HeLa cell lines.
CONCLUSION 2. Patel PR, Raval BP, Karanth HA, Patel VR, Potent antitumor
activity of Rubia cordifolia , International Journal of
Study results (Table 1) show that root extracts of Rubia Cordifolia is
Phytomedicine, Vol 2, 2010, 44 46.
promisingly cytotoxic against human larynx carcinoma and human
3. Akbar MA, Ahamed R, Alam KD, Ali MS, In Vitro Cytotoxic
cervical cancer. None of the fraction of the extract was found to be
Properties of Ethanolic Extracts of Various Parts of Swietenia
cytotoxic against the normal cell line (HEK293) in the given range of
Mahagoni , European Journal of Scientific Research, Vol.32
concentration. No.4, 2009, 541 544.
4. Lieberman MM, Patterson GML, Moore RE, In vitro bioassays
So, this plant extracts may have clinical and therapeutic proposition
for anticancer drug screening: effects of cell concentration and
in the most life threaten disease like cancer and further studies are
other assay parameters on growth inhibitory activity Cancer
required to investigate these plant samples as antineoplastic agents.
Letters 173, 2001, 21 29.
5. Cell Proliferation Kit II (XTT), Cat. No. 11 465 015 001, Roche
REFERENCES
Diagnostics GmbH, Roche Applied Science, 68298 Mannheim,
Germany, August 2005.
1. Rao GV, Kumar S, Islam M, Mansour SE, Folk medicines for
6. Freshney RI, Culture of animal cells, A manual of basic
anticancer therapy a current status , Cancer Therapy, Vol 6,
technique , Wiley Liss; 5th edition, 200 1, 209 11, 213 4, 251,
2008, 913 922.
328 32, 335 8, 359 70, 508.
71
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