|Year : 2017 | Volume
| Issue : 1 | Page : 39-45
Cosmeceutical effects of galactomannan fraction from Arenga pinnata fruits in vitro
Yanti1, Madriena2, Soegianto Ali3
1 Food Technology Program, Faculty of Biotechnology, Atma Jaya Catholic University; Master of Science in Biotechnology Program, Faculty of Biotechnology, Atma Jaya Catholic University, Jakarta 12930, Indonesia
2 Master of Science in Biotechnology Program, Faculty of Biotechnology, Atma Jaya Catholic University, Jakarta 12930, Indonesia
3 Master of Science in Biotechnology Program, Faculty of Biotechnology, Atma Jaya Catholic University, Jakarta 12930; Medicine Program, Faculty of Medicine, Atma Jaya Catholic University, Jakarta 14440, Indonesia
|Date of Web Publication||8-Feb-2017|
Faculty of Biotechnology, Atma Jaya Catholic University, Jalan Jenderal Sudirman 51, Jakarta 12930
Source of Support: None, Conflict of Interest: None
| Abstract|| |
Background: Cosmeceuticals refer to natural cosmetics with medical-like benefits due to their bioactive contents. Sugar palm fruit (Arenga pinnata) extract has been claimed for its anti-aging effect in vitro. However, its active compounds for cosmeceuticals is still unclear. Objective: This study was aimed to extract galactomannan from A. pinnata fruits and test its efficacy for tyrosinase inhibition, antioxidant, and anti-photoaging activities in vitro. Materials and Methods: Galactomannan from A. pinnata fruits was extracted by freeze drying and identified for its chemical compounds by using pyrolysis gas chromatography-mass spectrometry (py-GC/MS). Galactomannan was tested for its tyrosinase inhibition in both cell-based (melanocytes) and enzymatic assays, antioxidant activity using ferrous ion chelating assay (FCA) assay, and anti-photoaging activity for inhibiting the gene expression of matrix metalloproteinase-1 (MMP-1) and MMP-13 in macrophages using quantitative real-time polymerase chain reaction (qRT-PCR) analysis. Results: Identification of galactomannan fraction from A. pinnata fruits by py-GC/MS mainly consisted of oxonium ion and glucosides. For cellular assay, galactomannan at 5 μg/mL inhibited >50% of tyrosinase activity in melanocytes induced by phorbol myristate acetate. At the enzymatic level, galactomannan at similar concentration showed less tyrosinase activity inhibition (~20%). FCA results showed that galactomannan at 10 μg/mL exerted >50% of antioxidant activity. The qRT-PCR data indicated that galactomannan at 5 μg/mL inhibited >50% of MMP-1 and MMP-13 gene expressions in ultraviolet B-treated macrophages. Conclusion: Galactomannan fraction from A. pinnata fruits has efficacy for enlightening effect, antioxidant, and anti-photoaging activity in the dose-independent pattern, indicating its cosmeceutical effects for skin healthcare.
Keywords: Arenga pinnata, cosmeceutical agent, galactomannan fraction, sugar palm fruit
|How to cite this article:|
Yanti, Madriena, Ali S. Cosmeceutical effects of galactomannan fraction from Arenga pinnata fruits in vitro. Phcog Res 2017;9:39-45
|How to cite this URL:|
Yanti, Madriena, Ali S. Cosmeceutical effects of galactomannan fraction from Arenga pinnata fruits in vitro. Phcog Res [serial online] 2017 [cited 2018 Jan 22];9:39-45. Available from: http://www.phcogres.com/text.asp?2017/9/1/39/199773
- A. pinnata fruit containing galactomannan has cosmeceutical potentials through enlightening effect, antioxidant, and anti-photoaging activity in vitro.
- Galactomannan fraction has inhibitory effect on tyrosinase activity in both cellular melanocytes and enzymatic systems.
- Galactomannan fraction has strong protection against UVB-irradiation effect by inhibiting collagenase genes (MMP-1 and MMP-13) in macrophages.
| Introduction|| |
Cosmeceuticals are first popularized by Kligman and defined as cosmetic products containing biologically active compounds that have medical-like benefits. Cosmeceuticals are described as the combination of cosmetics and drugs. Cosmetics refer to products that use for cleansing, beautifying the skin, promoting attractiveness, and altering appearance, while drugs are associated with products for preventing, mitigating, and treating diseases by affecting the structure and body function., Cosmeceuticals are used topically, but its ingredients influence skin biological function; it delivers nutrients to maintain the skin health. Nowadays, cosmeceuticals are claimed to improve skin tone, while reducing wrinkle (aging). Aging is a normal process in life by the passage of time. Aside from our whole body metabolism, extrinsic factors, such as photoaging by ultraviolet (UV) irradiation from the sun, may cause aging faster. A stressful life condition also becomes one of the most important factors in this very high technology era. Thus, people now concern about their skin appearance and want to prevent aging or other degenerative skin conditions.
In early 1980's, Kligman introduced the term of cosmeceuticals through the use of retinoid acid as an active compound in developing a formulation to improve UV damaged and skin wrinkle. Some cosmeceuticals are natural, while others are synthetic, but all contain active ingredients.
Several reports showed that cosmeceutical peptides and plant cosmeceuticals have been the focus of investigation in the development of a formulation for skin healthcare. Some plants extracts and bioactive compounds such as green tea, ferulic acid, and grape seed have been proven to improve structure and function of the skin due to their antioxidant and sun protection effects to skin. Concerning this issue, natural polysaccharides have been known to protect skin from damaging factors. In the previous study, glucomannan isolated from Candida utilis exerted a potential photoprotective effect against the damaging effects of UVB exposure. Sugar palm fruit (Arenga pinnata) is rich in polysaccharide contents, particularly galactomannan gum that has beneficial health effects, such as anticancer and high antioxidant activities. However, its cosmeceutical effect for skin healthcare is still unclear. This study was aimed to extract galactomannan fraction from A. pinnata fruits and test its efficacies as tyrosinase inhibitor, antioxidant, and anti-photoaging agent in vitro.
| Materials and Methods|| |
Young (half-ripe) sugar palm fruits (A. pinnata) were purchased from the traditional market at Jakarta (Indonesia). Before extraction, the fruit endosperms were rinsed with clean water. Galactomannan as polysaccharide fraction was extracted by freeze drying method. After suspending the endosperms for 3 days, they were homogenized using a blender and then centrifuged. An equal amount of 95% ethanol was added to the clear supernatant, and the white precipitate was formed. The white precipitate was separated by decantation and freeze dried as galactomannan fraction.
Compound identification by pyrolysis gas chromatography-mass spectrometry
The composition of the galactomannan fraction was identified by pyrolysis gas chromatography-mass spectrometry (py-GC/MS) using QP2010. The sample was injected to the capillary column with 60 m × 0.25 mmID film thickness. Pyrolysis temperature was set to 280°C. Helium was used as the carrier gas.
Cytotoxicity assay of galactomannan fraction in phorbol myristate acetate-treated melanocytes
The cytotoxicity assay was done using the 3-(4,5-diethylthiazol-2-yl)-2,5-dipheniltetrazolium bromide (MTT) colorimetric assay. The B16F10 melanocytes (ATCC CRL-6475) represented skin cell model for testing sample toxicity. Cells were cultured in Roswell Park Memorial Institute media supplemented with 10% fetal bovine serum (FBS), 100 U/mL penicillin A, and 100 U/mL streptomycin. Cell culture was incubated at 37°C for 24 h in humidified atmosphere of 5% CO2/95% air. For MTT assay, cells were grown until the confluence was reached 50–60% in a 96-well plate. Cells were washed with phosphate-buffered saline (PBS) and added with media. Cell media were induced with 10 ng/µL of phorbol myristate acetate (PMA) and treated with galactomannan fraction from A. pinnata fruits at various concentrations (5–150 µg/mL). Cell media were incubated at 37°C in humidified atmosphere of 5% CO2/95% air for 48 h. After incubation, media were removed, and cells were washed with PBS. A 20 µL of MTT reagent was added to the cells, followed by incubation for 3 h at 37°C. Ascorbic acid (5–100 µg/mL) as a reference cosmeceutical agent was prepared in a similar procedure. The absorbance of the cell color changes was measured at 590 nm using macroplate reader.
Tyrosinase assay for galactomannan fraction
Tyrosinase assay was done to determine whether galactomannan fraction from A. pinnata fruits inhibited tyrosinase activity for blocking hyperpigmentation. Tyrosinase activity was conducted in two systems, cellular and enzymatic level. Cellular assay for tyrosinase activity was done in B16F10 melanocytes (ATCC CRL-6475). Cells produced melanin that was controlled by tyrosinase. Cells were stimulated with PMA (10 ng/mL) to induce hyperpigmentation in cells and treated with galactomannan fraction at various concentrations (5–150 µg/mL). Cells were incubated at 37°C in humidified atmosphere of 5% CO2/95% air for 48 h. After washing with PBS, then cells were lysed with trypsin., Cell lysate was centrifuged, and cell extract was obtained. A 100 µL of cell extract was mixed with fresh L-3,4-dihydroxyphenylalanine (L-DOPA) and incubated at 37°C for 30 min. Ascorbic acid (5 µg/mL) as a reference cosmeceutical agent was prepared in a similar procedure. Absorbance was measured at 490 nm using macroplate reader.
Enzymatic assay was done by adding galactomannan fraction (5–150 µg/mL), tyrosinase (333 unit/mL in 50 mM PBS pH 6.5), and fresh L-DOPA 12 mM into a 96-well plate. After incubation in 37°C for 30 min, the absorbance was measured using macroplate reader at 510 nm. Ascorbic acid (5 µg/mL), quercetin (25 µg/mL), and arbutin (10 µg/mL) were used as reference cosmeceutical agents.
Antioxidant assay for galactomannan fraction
Antioxidant assay was conducted to determine if galactomannan fraction from A. pinnata exerted antioxidant activity using ferrous ion-chelating assay (FCA) for reduction of free radicals and protection against photodamage in skin. Ferrous ions as the most effective prooxidants interact with hydrogen peroxide and form reactive hydroxyl radicals. A ferrozine forms stable magenta-colored complexes with ferrous ion. In the presence of other chelating agents from galactomannan antioxidant, the complex formation is disrupted, and the color of the complex decreases. One milliliter of galactomannan fraction at 5–500 µg/mL was mixed in 3.7 mL ddH2O and 0.1 mL ferrous chloride. After 3 min incubation, a 0.2 mL of ferrozine was added, then incubated at room temperature for 10 min. Absorbance was measured at 562 nm against blank. Control (ethanol) without sample was prepared in a similar procedure. Ethylenediaminetetraacetic acid (EDTA) at similar concentrations was as a reference standard. The chelating activity was calculated using this equation: Chelating activity (%) = (Abs control − Abs sample)/Abs control × 100%.
Anti-photoaging assay of galactomannan fraction
Anti-photoaging activity assay was done in the RAW 264.7 macrophages (ATCC TIB-71) in vitro. Cells were used to represent skin aging model where the cells were exposed with UVB to induce photoaging condition, and galactomannan fraction from A. pinnata were tested to see its efficacy for recovering wrinkle condition. Cells were cultured in Dulbecco's modified eagle media supplemented with 10% FBS, 100 U/mL penicillin A, and 100 U/mL streptomycin. Cell culture was incubated at 37°C for 24 h in humidified atmosphere of 5% CO2/95% air. Cells were grown to 50–60% confluence. Cells were washed and added with PBS, followed by irradiation with UVB at 30 mJ/cm 2 for 30 s. PBS was then removed, and cells were incubated with serum-free media with galactomannan fraction at various concentrations (1–25 µg/mL) for 24 h. The media was separated, and cells were lysed using trypsin. The cellular lysate was further used for mRNA extraction.
Quantitative real-time polymerase chain reaction
The quantitative real-time polymerase chain reaction (qRT-PCR) was done to quantify the effect of galactomannan fraction at various concentrations (1–25 µg/mL) on the expression of collagenase genes (matrix metalloproteinase-1 [MMP-1] and MMP-13) in UVB-treated macrophages. Total RNA from the cellular lysate was extracted using TRIzol reagent (Life Technologies, California, US) according to the manufacturer's protocol and quantified spectrophotometrically at 260/280 nm using NanoDrop. cDNA was synthesized using iScript One-Step RT-PCR Kit with SYBR Green and KAPA SYBR FAST qPCR Kits for analysis by qRT-PCR. Glyceraldehyde 3-phosphate dehydrogenase was used as housekeeping gene control. Primer sequences for qRT-PCR were listed in [Table 1]. The gene expression of MMP-1 and MMP-13 were calculated and expressed as ratios.
|Table 1: Oligonucleotide primer sequences for quantitative real-time polymerase chain reaction|
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Duplicate experiments were performed throughout this study. All data are presented as mean ± standard deviation. The significant difference between control and treated groups were statistically analyzed by the t-test (P < 0.05).
| Results|| |
Galactomannan fraction from Arenga pinnata and its chemical compounds identification
One gram of dried powder of galactomannan fraction was extracted from 600 g of A. pinnata young fruits (with yield extraction of 0.167%). Galactomannan fraction had characteristics, including white opaque color, transparent coating, plastic-like texture, water soluble, and odorless. Chromatogram profile showed that galactomannan fraction from A. pinnata consisted of 20 different chemical compounds that were grouped into several classes, including oxonium ions (56.17%), pyrans (14.04%), light oxygenates (6.39%), steroids (5.61%), furans (3.24%), anhydrosugars (0.55%), and others (11.2%) [Figure 1] and [Table 2]. There were two major compounds found in galactomannan fraction, i.e. 1, 2, 3, 4-cyclopentanetetrol and methyl α-D-glucopyranoside.
|Figure 1: Chromatogram of galactomannan fraction derived from Arenga pinnata fruits by pyrolysis-gas chromatography mass spectrometry|
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|Table 2: Chemical compounds of galactomannan fraction derived from Arenga pinnata fruits|
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Cytotoxicity of galactomannan fraction in phorbol myristate acetate-treated melanocytes
MTT results demonstrated that PMA as an inducer for hyperpigmentation did not significantly affect the cell viability of B16F10 melanocytes [Figure 2]. Meanwhile, galactomannan fractions from A. pinnata showed various responses on melanocytes growth. At lowest concentration, galactomannan fraction showed less cytotoxicity effect (<20%), while at higher concentration (>5 µg/mL), it reduced cell viability up to ~ 40%. Ascorbic acid at various doses (5–100 µg/mL) had no effect on cell viability.
|Figure 2: Cytotoxicity of galactomannan fraction in phorbol myristate acetate-treated melanocytes. Cells were induced with phorbol myristate acetate (10 ng/mL) and treated with galactomannan fraction (5–150 μg/mL) and ascorbic acid standard (5–150 μg/mL). Cells without phorbol myristate acetate and sample were negative control (C–) and cells treated with phorbol myristate acetate only were positive control (C+). Data were shown as mean ± standard deviation from duplicate experiments. P < 0.05 against phorbol myristate acetate-treated cells|
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Tyrosinase activity of galactomannan fraction
For cellular assay, B16F10 melanocytes were stimulated with PMA for hyperpigmentation condition due to the increased activity of tyrosinase. Our results showed that galactomannan fraction at 5 µg/mL exerted highest inhibition (~60%) on tyrosinase activity in PMA-treated melanocytes [Figure 3]a. In contrast, ascorbic acid standard at a similar concentration only reduced < 30% of tyrosinase activity. For enzymatic assay, galactomannan fraction dose-independently showed less inhibition (~20–30%) on tyrosinase inhibitory effect [Figure 3]b. At 10 µg/mL, its inhibitory effect was quite similar with arbutin (10 µg/mL) and quercetin (25 µg/mL). Both results indicated that galactomannan fraction exerted tyrosinase inhibition in the dose-independent manner.
|Figure 3: Tyrosinase activity of galactomannan fraction using cellular (a) and enzymatic (b) assays. Cellular assay used melanocytes and cells were induced with phorbol myristate acetate (10 ng/mL) and treated with galactomannan fraction (5–150 μg/mL). Ascorbic acid (5 μg/mL; AA) was used as a reference agent. Cells without phorbol myristate acetate and sample were negative control (C.) and cells treated with phorbol myristate acetate only were positive control (C+). Enzymatic assay was conducted by using L.3,4.dihydroxyphenylalanine substrate, tyrosinase, and galactomannan fraction at various concentrations (5–150 μg/mL). Ascorbic acid (5 μg/mL; AA), quercetin (25 μg/mL; Q), and arbutin (10 μg/mL; A) were used as reference agents. Control (C) was L.3,4.dihydroxyphenylalanine and tyrosinase only. Data were shown as mean ± standard deviation from duplicate experiments. P < 0.05 against control|
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Antioxidant activity of galactomannan fraction
To test the ability of galactomannan fraction from A. pinnata as an antioxidant for skin protection, FCA was conducted. Our results demonstrated that galactomannan fraction at 10 µg/mL showed higher antioxidant activity (~50%) compared to that of ascorbic acid standard [Figure 4]. Galactomannan fraction did not show dose effect on its antioxidant ability, while ascorbic acid exerted an antioxidant effect in the dose-dependent manner.
|Figure 4: Antioxidant activity of galactomannan fraction (5–500 μg/mL) by FCA. Ethylenediaminetetraacetic acid at similar concentrations was used as the reference agent. Data were shown as mean ± standard deviation from duplicate experiments|
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Gene expression of gelatinases (matrix metalloproteinase-1 and matrix metalloproteinase-13) by galactomannan fraction in ultraviolet B-treated macrophages
The qRT-PCR results showed that UVB irradiation (30 mJ/cm 2) strongly induced the gene expression of gelatinases (MMP-1 and MMP-13) in UVB-treated macrophages. Galactomannan fraction at various concentrations (1–25 µg/mL) significantly blocked >90% of both MMP-1 and MMP-13 gene expressions in cell system in the dose-independent manner [Figure 5].
|Figure 5: Effects of galactomannan fraction on the gene expression of matrix metalloproteinase-1 and matrix metalloproteinase-13 in ultraviolet B-treated macrophages by quantitative real-time polymerase chain reaction. Cells were induced with ultraviolet B (30 mJ/cm2) and treated with galactomannan fraction (1–25 μg/mL) for 24 h. Cells without ultraviolet B and sample were negative control (C–) and cells treated with ultraviolet B only were positive control (C+). Data were shown as mean ± standard deviation from duplicate experiments. P < 0.05 against ultraviolet B-treated cells|
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| Discussion|| |
In this study, we isolated polysaccharide fraction, i.e. galactomannan, derived from A. pinnata fruits and explored further for its bioefficacy as a promising cosmeceutical agent through mechanisms of tyrosinase inhibition, antioxidant, and anti-photoaging in vitro. Our data showed that galactomannan fraction obtained from young A. pinnata endosperms was similar with the previous study. The galactomannan content was varies in a very low amount. It is noted that the content depends on different pretreatments and the endosperms maturity stage.
Mature A. pinnata endosperms are associated with higher galactomannan contents, appearance, and moisture properties., This also indicates in the appearance of the extract; the higher opacity value has higher galactomannan concentration. It is correlated to the phenol compound concentration because the opacity is caused by interaction between polysaccharide and phenol compound. Galactomannan forms gel at temperature 30–70°C which depends on its structure and its solubility behavior. This characteristic is very useful to make products that are sensitive to high temperature.
The most abundant compound found in galactomannan fraction from A. pinnata is the 1, 2, 3, 4-cyclopentanetrol [Figure 1], an ion related to a carbonic acid. It is used to stabilize reactive compounds and decrease the reaction. It can be generated by splitting reactions which are subject to certain selective controls. The second most abundant compound, i.e. methyl-α-D-glucopyranoside, is known as a glucoside (monosaccharide) as the result of glucose catalyzed by methanol. Glucoside is a glycoside with glucose as its sugar constituent. It is an emulsifier applied for personal care products and cosmetics; act to reduce tacky feel and synergistic humectant performance.
Other sugar compounds found were sugar derivatives and intermediate compounds from mannose (1,4-anhydro-D-mannitol) or cellulose (5-hydroxymethylfurfural). The previous study also showed that the 1,6-anhydro-β-D-glucopyranose, known as levoglucosan (used as preservatives), was found as the most abundant compound in A. pinnata extract. Levoglucosan is an important intermediate in cellulose pyrolysis that is released from hemicellulose combustion. In this study, levoglucosan broke down to form pyrans, furans, light oxygenates, and anhydrosugars as identified by py-GC/MS. The second most abundant compound was 1, 2, 3, 4-cyclopentanetetrol (7.50%), which is the most abundant compound in this study.
Cell cytotoxicity refers to the ability of compounds to destroy living cells. In drug development, this assay is used to determine the safety dose of compounds toward cell growth. MTT results showed that galactomannan fraction from A. pinnata at various doses had weak cytotoxicity against cell viability of PMA-treated melanocytes [Figure 2]. According to López-García et al., cytotoxicity is considered as nontoxicity at >80% cell viability; 80–60% is weak; 60–40% is moderate and <40% is strong cytotoxicity. PMA inducer only caused less toxicity effect against cell growth. PMA was used to enhance hyperpigmentation by increasing tyrosinase-related protein-1 gene expression encoded tyrosinase in melanocytes.
Tyrosinase activity was conducted using both cellular and enzymatic assays to determine enlightening effect of galactomannan fraction from A. pinnata. Our results demonstrated that galactomannan fraction was found to be more effective to inhibit tyrosinase activity in PMA-treated melanocytes than that of enzymatic system [Figure 3]. It is indicated that galactomannan fraction is more responsive to block melanogenesis in PMA-treated melanocytes. Its efficacy at low dose (5 µg/mL) exerted higher inhibition on tyrosinase activity compared to that of ascorbic acid standard [Figure 3]a. Meanwhile, enzymatic assay is considered as a fast screening tool for tyrosinase inhibitor candidates. Interestingly, both galactomannan fraction and ascorbic acid standard had a similar inhibitory effect on tyrosinase activity in the conversion of L-DOPA to dopaquinone [Figure 3]b.
Ascorbic acid is a potent water-soluble natural skin care ingredient that actively works in reducing melanin formation, neutralizing free radicals, and increasing collagen synthesis in skin. Ascorbic acid is a well-known antioxidant and tyrosinase inhibitor. Other standards including quercetin and arbutin isolated from plants are also recognized as skin protectors against damage caused by free radicals and skin whitening agents through inhibiting tyrosinase activity that is responsible for melanin formation., Tyrosinase controls synthesis rate of melanin that governs skin and hair color and also has harmful UV rays protection. However, overproduction and accumulation of melanin due to UV radiation exposure could lead to various skin disorders.
A. pinnata is known as a palm native to tropical Asia, from Eastern India east to Malaysia, Indonesia, and the Philippines in the East. Various water and alcoholic extracts of A. pinnata different parts (leaves, stems, bark, roots, fruit, flowers or flower buds, seeds, and sap) have been reported for their biological and beneficial results when applied to skin. A. pinnata extracts were shown to possess antioxidant and in vitro MMP-1 inhibitory properties, but they were ineffective toward lipoxygenase and tyrosinase inhibition. Thus, A. pinnata extracts could be developed as promising ingredients for topical skin care products.
Antioxidant activity of galactomannan fraction at various doses was tested using FCA assay with principle of metal-chelating activity. Galactomannan fraction at low dose (10 µg/mL) demonstrated higher antioxidant activity (>50%) than EDTA standard [Figure 4]. This data are in linier with antioxidant activity of galactomannan isolated from seed extract of Gleditsia triacanthos. Interestingly, our previous study demonstrated that the 1,1-diphenyl-2-picryl-hydrazyl (DPPH) results for antioxidant activity of galactomannan fraction from A. pinnata at similar dose exerted less antioxidant activity (<40%). It is noted that galactomannan may act as an antioxidant by chelating metal ions and neutralizing free radicals, indicating that FCA assay is more sensitive than DPPH assay.
In FCA assay, ferrous ion is one of the most effective pro-oxidants among all metal ions which can catalyze hydrogen peroxide oxidation in the body and generate hydroxyl radical. One of the antioxidant mechanisms is by chelating the metal ion to prevent oxidation. Ferrous ion can form Fe 2+-ferrozine complex with magenta color in the result. If there is ferrous chelating agent, Fe 2 + will be chelated before the complex formation. The complex is disrupted, followed by decreasing of the magenta color. Measurement of the color reduction, therefore, estimates the chelating activity.
Our qRT-PCR results demonstrated that galactomannan fraction had strong protection against UVB-irradiation effect, indicating by low expression of MMP-1 and MMP-13 genes in UVB-treated macrophages [Figure 5]. This data are in linear with the previous study by Florence et al. that showed the efficacy of A. pinnata extracts on inhibition of MMP-1 expression at gene and protein levels.A. pinnata extracts significantly increased collagen synthesis in skin cells through blocking the expression of MMP-1 gene and protein in vitro.
MMP-1 and MMP-13 are specific collagenases with unique ability to denature various collagen substrates, including Type I, II, and III. MMP-1 and MMP-13 are expressed mostly in various cancer, inflammation, primary tumor, and premature aging cells after irradiation with infrared and UV. It is also known that human keratinocytes and squamous epithelial cells specifically expressed collagenases, including MMP-1, MMP-9, and MMP-13. A Recent report from Apraj and Pandita showed that the peel of Citrus reticulata Blanco exerted skin anti-aging potentials via antioxidant, anti-collagenase, and anti-elastase effects. Other study also revealed that the use of sunscreen products containing various herbs, such as aloe vera, jojoba, cucumber, wheat germ, and olive, with sun protection factor range 10–40 was enough potential to protect skin from harmful UVA and UVB exposures based on photo-stability and psychometric evaluation.
Several studies on edible palm products, i.e. edible fruits (endosperms), edible hearts, sap, and edible starch, and their characteristics and applications have been published by most researchers from Asian regions. Torio et al. showed that galactomannan extracted from Arenga saccharifera endosperms at different maturity stages (young, mid-mature, and mature) exerted different characteristics in terms of solvent solubility, specific gravity, water-holding capacity, viscocity, mannose: Galactose ratio, total sugar content, and soluble protein concentration. A recent study from Navaro stated that galactomannan gum from A. pinnata endosperms has been purified in terms of high yield. Gum appears as hard translucent white solid and is soluble in various aqueous solutions, resistant to low pH, and unstable at extreme temperature. However, both studies were only focused on isolation and characterization of galactomannan from sugar palm fruits, but not explored on bioefficacy of galactomannan for food and cosmeceuticals applications. Our results demonstrated the effect of galactomannan fraction from A. pinnata fruits for cosmeceuticals study.
It is widely known that the major prominent products from palm tree are palm sap, fruits, and fibres. Several studies demonstrated the utilization of palm starch as a promising biodegradable agent for food industry. A study by Ishak et al. has been focused on the use of edible starch from A. pinnata for biofibers, biopolymers, and biocomposites. The combination of starch-based biodegradable composites with date palms and flax fibers significantly enhanced the characteristics and provided a competitive eco-friendly biocomposites for various applications.
Sugar palm starch from A. pinnata has been also developed as biodegradable films for food packaging. The new thermoplastic starch derived from A. pinnata starch was successfully developed in the presence of biodegradable glycerol as a plasticizer. The previous study from Adawiyah et al. reported that both edible starches from A. pinnata and Metroxylon sagu exerted similar characteristics in terms of amylase contents and peak gelatinization temperature, but not in the breaking properties and texture profile. Other application is the use of palm sap from A. pinnata for the production of palm sugar. Ho et al. demonstrated that thermal processing affected the physicochemical composition of palm sugar from A. pinnata sap, including its sugar color, soluble solids (Brix), amino acid contents, sucrose, and pH value.
| Conclusion|| |
Galactomannan fraction from A. pinnata exerted cosmeceutical potentials for enlightening effect by inhibiting tyrosinase activity, antioxidant activity by chelating Fe 2 + ion, and anti-photoaging activity by inhibiting MMP-1 and MMP-13 gene expression. Further study is needed to formulate cosmeceutical products containing A. pinnata galactomannan and test its efficacy using in vivo animal model for natural skin care product development.
We would like to thank Prof. Jae-Kwan Hwang from Department of Biotechnology, Yonsei University (Korea) for kindly donating cell culture collection.
Financial support and sponsorship
This research was funded by 2014 Faculty Grant from Institute for Research and Community Service, Atma Jaya Catholic University, Jakarta (Indonesia).
Conflicts of interest
There are no conflicts of interest.
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| Authors|| |
Yanti obtained her PhD from Department of Biotechnology, Yonsei University (Korea). She is a lecturer at Faculty of Biotechnology, Atma Jaya Catholic University (Indonesia). Her research is focused on natural products and their molecular mechanisms for treatment of inflammatory-related diseases.
[Figure 1], [Figure 2], [Figure 3], [Figure 4], [Figure 5]
[Table 1], [Table 2]