The Influence of Synthesis Methods Against Anti-Cancer Activity of Curcumin Analogous
Imanuel Berly Delvis Kapelle1, 2, Tun Tedja Irawadi3, Meika Syahbana Rusli2, Djumali Mangunwidjaja2, Zainal Alim Mas’ud3
1Chemistry Department, Mathematic and Natural Science Faculty, Pattimura University, Maluku, Indonesia
2Agricultural Industry Technology Department, Agriculture Technology Faculty, Bogor Agricultural Institute, Bogor, Indonesia
3Chemistry Department, Mathematic and Natural Science Faculty, Bogor Agricultural Institute, Bogor, Indonesia
To cite this article:
Imanuel Berly Delvis Kapelle, Tun Tedja Irawadi, Meika Syahbana Rusli, Djumali Mangunwidjaja, Zainal Alim Mas’ud. The Influence of Synthesis Methods Against Anti-Cancer Activity of Curcumin Analogous. Cancer Research Journal. Vol. 3, No. 4, 2015, pp. 68-75. doi: 10.11648/j.crj.20150304.12
Abstract: Activity anticancer of curcumin analogous influenced by the structure, substituent and geometric isomeric. The purpose of this research was to determine the influence of curcumin analog synthesis methods against anti-cancer activity. The value of IC50 tested in vitro against breast cancer cells T47D uses the MTT method for samples aks (1,5-bis-benzo[1.3]dioxol-5-yl-penta-1,4-dien-3-one) with a method of the process of microwave 257,798 µg/ml better than conventional method 555,276 µg/ml. The results IC50 for samples akas (5-benzo 1.3 dioxol-5-yl-1-phenyl-penta-2,4-dien-1-one) with a method of microwave 7,247 µg/ml better than conventional method 125,300 µg/ml. Microwave method produces a product with a lower melting point and provide the results of anti-cancer activity against breast cancer cells T47D.
Keywords:Anticancer Activity, In Vitro, curcumin analogous
Analogous compounds (homologous) curcumin is a compound that has properties pharmacological of the same or even better compared to the parent compound . Curcumin compounds are cancer drugs from natural materials which have been reported to have anti-cancer activity of ginger [1,2]. Curcumin and curcumin analogous to have biological activity as anti-inflammatory, antioxidant, antitumor, and anticancer drug [3,4,5,6,7]. Activity of each compound is influenced by differences in functional groups and structures that affect the physical-chemical properties and pleiotropic effects . Some analogues of curcumin with different substituent at the test activity in vitro and in vivo pharmacokinetics showed that the stability of analog mono-carbonyl enhanced and the pharmacokinetic profile has also increased significantly . curcumin structure reacted with several molecules and give effect as anti-cancer and it is done with chemotherapy .
Curcumin analogues bis-1,7- (2-hydroxyphenyl) -hepta-1,6-diene-3,5-dione as an anti-cancer effect intestine by using radiation. Active side of curcumin analogues that provide those results are phenolic and conjugated double bonds . Concentrations of curcumin analogues greatly affect the in vitro study using radiation γ, curcumin analogues prevent the loss of antioxidants, enzymatic and non-enzymatic as GSH . Active group as an anti-inflammatory is cyclohexanone, which can improve the bioactivity . Based on data from screening, quantitative structure activity relationships, indicates that the substituent having electron-withdrawing properties in the benzene ring greatly affect the anti-inflammatory properties, two of the most active curcumin analog is that having substituents F and epoxide . Active side of curcumin analogues which shows breast anticancer activity is carbon atom on a phenol group .
Curcumin analog synthesis procedures are generally performed using two conditions, namely the reaction and the acidic conditions alkaline conditions  and the reaction process can be accelerated by using microwave radiation at 160W for 60-120s . Synthesis process can affect the purity, physical and chemical properties of the product. There are differences in activity between the isomers; one isomer having pharmacological activity, while others is virtually inactive. Differences in pharmacology work between the two enantiomers can be immense [17,18], so the purpose of this study was to determine the influence of analog synthesis process curcumin against anti-cancer activity in vitro against breast cancer cells T47D.
2. Material and Methods
Curcumin analogues synthesized product (AKS and AKAS), RPMI, aquabidest, NaHCO3, NaOH, HCL, FBS, penisilinn-streptomycin, T47D cells,
2.2. Manufacture of Culture Medium
RPMI medium prepared in the following manner: RPMI powder was dissolved in 950 ml of aquabidest sterile. Added 2.2 grams of NaHCO3 and stir until blended. Added akuabidest sterile until the volume of 1000 ml, stirring with a magnetic stirrer and added 1 N NaOH or HCl 1 N to get medium without serum at pH 7.4 which is the optimum pH of cell growth. Media sterilized by filtration through a micro filter size of 0.2 mm. The media are generally divided into 100-200 ml volumes and stored at 4 °C to avoid damage and contamination. RPMI medium-serum created by: 100 ml medium RPMI plus 10 ml of fetal bovine serum (FBS), 1 ml penicillin-streptomycin.
2.3. Preparation of Cells
T47D cells are inactive in the ampoule container (cryo tube) taken from a tank of liquid nitrogen or from the freezer -80°C and immediately defrost at room temperature until the proper melt, then sprayed ampoule with 70% alcohol. Ampoule is opened and the cell suspension was transferred dropwise into a sterile conical tube containing culture media (MK) with a micropipette 1000 ml. The cell suspension centrifuged 600 rpm for 5 minutes, and then part supernatant disposed. Added 4 ml of MK and suspended slowly until homogeneous using a pipette. Cells were observed with a microscope and incubated in an incubator at 37 °C with 5% CO2 stream. After 24 hours, the media was replaced and cells grown again until confluent and the amount are enough for the research.
2.4. Replacement of Media
Old media is slowly removed by micropipette or Pasteur pipette. 3 ml of PBS inserted into tissue culture dish containing cell and tissue culture dish shake it to the right and to the left to wash the cells. Afterwards, PBS disposed with a micropipette or Pasteur pipette. Put 5-7 ml MK new into the tissue culture dish containing cells, homogenized, and observed conditions and the number of cells on an inverted microscope. Incubated overnight and replaced MK if the color of the media has changed.
2.5. Harvest Cells
After a sufficient number of cells (80% confluent), the medium removed by micropipette or Pasteur pipette, cell colonies were washed with PBS 2 times. Added trypsin-EDTA (0.25% trypsin) evenly and incubated in an incubator for 3 minutes. Next, add 5 ml new MK to inactivate trypsin. Suspended cells into the medium and then transferred into a sterile conical tube. After that, the cells were counted using a hemocytometer.
2.6. Calculation of the Cell
Cell count can be done in the following way: 10 ml cell suspension is placed on a hemocytometer. Then the cells were counted on a hemocytometer under a microscope with a counter. The number of cells per mL can be calculated using the formula:
Cells that will be planted on the plate displacement required number of cells into a new conical tube and added MK in accordance with the desired concentration. The volume of cell harvest that required calculated using formula:
2.7. Sample Preparation
5mg sample was tested solubility in DMSO. Then added 50μl DMSO and dissolved with the aid of a vortex. If not dissolved, add 50μl DMSO and diluted further with the help of vortex. Next, create variations in the concentration of the sample by means of diluting samples in DMSO using MK.
2.8. Cytotoxic Test MTT Method
To determine the toxicity of the sample, cells inserted into micro plate 96-well with a density of 2x104 cells/wells, each 100μl cells and observed the state of cells in a microscope. Cells were incubated in an incubator for 24 hours. At the end of incubation, the culture medium containing sample disposed and washed with 100 mL of PBS. Furthermore, on each of the wells was added 100 mL MK sample containing content with variations and incubated for 48 hours back. At the end of incubation, the culture medium containing the sample was removed and washed with 100 mL of PBS. Then into each of the wells was added 100 mL culture medium containing 5 mg/ml tetrazolium salt MTT (3-(4,5-dimetiltiazol-2-yl)-2.5-difeniltetrazolium bromide) and incubated it back for 4 hours at a temperature 37 °C. Living cell will react with MTT to form formazan colored purple. After 4 hours, pitting each stopper reagent is added 100μL SDS 10% in 0,1N HCl to kill the cells and dissolve the formazan crystals. Plate wrapped in aluminum foil and then incubated at room temperature in the dark for overnight. Furthermore, each pitting absorbance read with ELISA reader at a wavelength of 595 nm.
3. Results and Discussion
Samples tested are products of curcumin analogues synthesized by different methods as shown in Table 1. In Table 2 is data absorbance at a wavelength of 595 nm for T47D cells and media, Table 3 is a cytotoxic test results for all four samples with varying concentrations, LC spectra of the sample can be seen in Figure 1.
|Sample Code||Method Process||Structure Formula||Image|
|Concentration µg/ml||Absorbance AKS-K||Absorbance AKS-M||Absorbance AKAS-M||Absorbance AKAS-K|
Data from table 3 are then analyzed to determine the IC50 value for each sample, the results can be seen in Figure 2 and table 4.
Viewed from both methods for the synthesis of the product 1,5-Bis-benzo[1,3]dioxol-5-yl-penta-1,4-dien-3-one and 5-benzo[1,3]dioxol-5- yl-1-phenyl-penta-2,4-dien-1-one, the method gives the best results as an anti-cancer is a method of the microwave. The product AKS and AKAS product has the same 2 conjugation bond that allows the formed product isomers. Isomer product is formed and stabilized in the synthesis process using microwave provides anti-cancer effects against cancer cells T47D. Differences in the pharmacological activity of the two isomers can be very big, because this molecule functional groups apart at different distances in different isomer.
Mechanism of microwave heating is their agitation polar molecules or ions that move (Oscillate) due to the movement of magnetic or electrical fields. The existence of the field motion, so that the particles try to align the orientation or the terrain. The movement of the particles is limited by the limiting force (inter-particle interactions and electrical resistance), which restrain the movement of particles and resulting in random motion and heat. In the microwave heating, solvents and particles heated causing warming that evenly . The mechanism of microwave heating is dipolar polarization, interfacial polarization, and conduction mechanism . Melting points of these two methods are not too different, for sample akas-m 104oC while sample akas-k 111oC; Melting point sample aks-m 180oC while sample aks-k 191oC. There are equations for microwave method, where for the second compound has a melting point lower than conventional methods. Product isomers formed and most stable during this process will last and the most dominant. The type of substituents, the position and orientation can affect the stability of the system .
Curcumin analog synthesis process provides an enormous influence on the activities of anti-cancer, although compounds have the same structure but can provide different activities depending on the isomer produced. The stability of the product during the process will produce the dominant product, from both samples aks and akas, the method that gives the best results is the microwave. Samples that give the best results is akas (5-benzo [1,3] dioxol-5-yl-1-phenyl-penta-2,4-dien-1-one) by using microwave with IC50 values 7.247 ug / ml , Microwave method produces a product with a lower melting point and provide the results of anti-cancer activity against breast cancer cells T47D.