Phytochemical and Cytotoxic Test of Durio kutejensis Root Bark on MCF-7 Cells

Durio kutejensis has known potential as herbal medicine in Kalimantan. Many things can be explored from D. kutejensis related pharmacological activity in every part of the plant included root bark. This study investigated the phytochemical content with a qualitative test and tested cytotoxic activities of D. kutejensis root bark on MCF-7 cell lines. Cytotoxic activity tested on MCF-7 cells with MTT assay method. The result showed that D. kutejensis root bark contains flavonoid, tannin, terpenoid, phenol, and saponin. IC50 value for ethanol extracts of root bark, n-hexane fractions, ethyl acetate fractions, and doxorubicin on MCF-7 cells were 761.29; 280.5; 207.08; and 0.25 μg/mL, respectively. In conclusion, D. kutejensis root bark has some secondary metabolites but no cytotoxic activity on MCF-7 cells. Further research is needed to explore the anticancer activity of secondary metabolites on some other cancer cells and other pharmacological activities

TOTAL PHENOLIC CONTENTS, ANTIOXIDANT, ANTICANCER AND ANTIDIABETIC PROPERTIES OF Myrmecodia tuberosa (RUBIACEAE)

Myrmecodia tuberosa, locally known as “Sarang Semutâ€, belongs to the Rubiaceae family. The aim of the study is to investigate the total phenolic contents and bioactivity of the crude extract of M. tuberosa. The tuber, bark and leaves of the plant were cut, washed and air-dried. The plant was extracted with ethyl acetate and ethanol to yield EtOAc and EtOH crudes. The crudes were then tested for antioxidant 2,2-diphenyl-1-(2,4,6-trinitrophenyl)hydrazyl (DPPH) assay, α-glucosidase assay for anti-diabetic activity and [3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium] MTT Assay for cytotoxicity test. The results showed that bark ethanolic extract demonstrated the highest DPPH scavenging of 95.16% while other crudes were ranging from 92.77% to 94.55% scavenging of DPPH compared to ascorbic acid. The tuber ethyl acetate extract demonstrated the highest inhibition of α -glucosidase enzyme with 72.58% while other crudes were ranging from 63.27% to 72.46% inhibition. In addition, the ethanolic tuber extract exhibited the strongest cytotoxicity against Human colorectal Cancer (HT-29) and Cervical Cancer (HeLa) cell lines with the IC50 value of 16 µg/mL and 14 µg/mL respectively. Meanwhile, the ethanolic bark extract exhibited the strongest cytotoxicity against Human Breast Cancer (MCF-7) with IC50 value of 6.0µg/mL. Furthurmore, the tuber extracts contained the highest phenolic content with 1087mg GAE/ g extract compared to the leaves and barks of the plants. The findings suggest that the whole part of M. tuberosa is a potential natural source for anti-oxidative, anti-diabetic and anti-cancer agent

Cytotoxic and antioxidant properties of Borneo Garcinia species (Clusiaceae)

There are several local Malaysian Garcinia species which have ethnobotanical uses but so far very few studies have been carried out to link these folkloric uses with the phytochemistry of these plant species. It would be interesting therefore, to develop phytochemical data of two such Sarawakian species which are Garcinia eugenifolia and Garcinia nitida which have not been reported before. The methanol extract from the G. eugenifolia leaves exhibited moderate antioxidant activity with EC50 values of 66 and 51 respectively, when compared to ascorbic acid with EC50 values of 15.32 μg/mL. This crude also showed weak cytotoxic activity to HeLa with IC50 values of 71 and 40 μg/mL respectively. However, the leaves extracts of G. nitida showed good cytotoxic activity with IC50 values of 4 and 7 μg/mL respectively towards both cell lines

Xanthone from Garcinia eugenifolia (Clusiaceae)

Studies on the twigs of Garcinia eugenifolia have led to the isolation of one xanthone 5,9-dihydroxy-8-methoxy-2,2-dimethyl-7-(3-methylbut-2-enyl)pyrano[3,2-b]xanthen-6(2H)-one (1) and one triterpenoid, sitosterol (2). Meanwhile, studies on the leaves of Garcinia eugenifolia provided another triterpenoid, friedelin (3). The structures of these compounds were determined by spectroscopic methods such as 1H NMR, 13C NMR, mass spectrometry (MS) and by comparison with previous studies. The hexane and ethyl acetate extracts of Garcinia eugenifolia indicated strong cytotoxicity towards the HL-60 cell line with IC50 values of 1.9 μg/ml and 2.5 μg/ml respectively. However, the methanol extract gave moderate inhibitory activities (IC50<10 μg/ml) towards HL-60 cell line

Composición química de los aceites esenciales de Piper stylosum Miq. y Piper ribosoides Wall. y sus actividades antioxidantes, antimicrobiana y de inhibición de la tirosinasa

Se determinaron las composiciones químicas, las actividades antioxidante y antimicrobiana, y el contenido total de fenoles de los aceites esenciales de P. stylosum y P. ribesioides. El análisis GC y GC-MS de los aceites esenciaales de hojas y tallos de P. stylosum permitió la identificación de 50 (89.2%) y 45 (88.8%) de components, respectivamente. Los principales componentes fueron aromadendreno (hojas 26.6%; tallos 18.8%), sabineno (hojas 13.8%; tallos 6.7%) y β-cariofileno (hoja 11.5%; tallo 17.9%). Se identificaron 60 (87.0%) y 39 (82.9%) components en los aceites esenciales de hojas y tallos de P. ribesioides. Los componentes más abundantes fueron β-cariofileno (hojas 20.0%; tallos 14.4%), canfeno (hojas 16.3%; tallos 12.3%) y δ-cadineno (hojas 4.4%; tallos 7.8%). Los aceites esenciales se ensayaron para determinar sus actividades antioxidantes con DPPH y el contenido de fenoles totales. Para los aceites esenciales obtenidos se determinaron valores bajos en la actividad antioxidante con DPPH y el contenido total de fenoles, en comparación con BHT. Sin embargo, los ensayos de inhibición de tirosinasa most raron que el aceite esencial de las hojas de P. ribesioides presento la mayor inhibición (30.0%), aunque mas baja que el compuesto control (Àcido Kójico, 81.8%). Para el aceite esencial de P. ribesioides se determinó una MIC 62.5 mg/mL contra Bacillus cereus y Staphylococcus aureus

Chemical compositions and antibacterial activity of the leaf and stem oils of Piper porphyrophyllum (Lindl). N.E. Br.

The essential oils obtained by hydrodistillation from the fresh leaf and stem of Piper porphyrophyllum N.E. Br. were analyzed by GC and GC/MS. Thirty four constituents were identi-fied in the leaf oil, while thirty eight constituents were identified in the stems oil. The most abundant components in the leaf oil included bicyclogermacrene (14.7 %), α-copaene (13.2 %) and β-phellandrene (9.5 %) while sabinene (15.5 %), bicyclogermacrene (12.3 %) and α-copaene (8.1 %) were the main constituents in the stem oil. The evaluation of antibacterial activity by using microdilution method revealed that both oils were moderately active against all the Gram-positive bacteria (Staphylococcus aureus, Bacillus subtilis) and Gram-negative bacteria (Pseudomonas aeruginosa, Pseudomonas putida and Escherichia coli) with minimum inhibitory concentration (MIC) values in the range 125-1000 μg/ml

The Theory and Practice of Ageing Housing Transformation in China and Abroad: A Review

This paper investigates the theoretical research and practical exploration in housing the ageing in western developed countries and China after France first entered the ageing society. The subject of housing the ageing was reviewed using the methods of literature search and induction analysis. In terms of practical exploration, three basic models of ageing adaptation in developed countries were extracted: public welfare policy, nursing insurance system, and market economy. The objectives, objects, contents, advantages, and disadvantages of the transformation were analysed; the practical exploration and problems encountered in China's pilot cities for ageing adaptation were summarized. Through comparative analysis, it is proposed that we should learn from the advanced experience of western countries to avoid their shortcomings. It is also suggested that the transformation of the people, the content, and the processes to be adapted to suit the local conditions in China

Antioxidant and anticholinesterase activities of essential oils of cinnamomum griffithii and C. macrocarpum

The essential oils of Cinnamomum griffithii and C. macrocarpum were analyzed by GC and GC-MS and evaluated for their antioxidant and anticholinesterase activities. The essential oils of leaf and bark of C. grffithii were characterized by the presence of 30 components, with methyl eugenol (38.5-43.8%) as the major component. A total of 11 components were characterized in.the leaf and bark of C. macrocarpum essential oil with the most abundant component was safrole (54.5-59.5%). The bark oil of C. griffithii demonstrated significant activity on DPPH (IC50 73.4 microg/mL) and a high phenolic content (192.0%), while the leaf oil inhibited oxidation of β-carotene/linoleic acid with an inhibition value of 65.5 μg/mL. Acetylcholinesterase and butyrylcholinesterase inhibition were assessed and the results showed that C. macrocarpun bark oil exhibited significant activity with inhibition values of 55.8% and 66.1%, respectively at a concentration of 1 mg/mL

In vitro antioxidant and anticancer activities of Clinacanthus nutans extracts

Clinacanthus nutans (CN), from the Acanthaceae family is a medicinal plant widely used in Thailand and Malaysia. CN is commonly used as a treatment of inflammation, cancer, and herpes virus infection. This study aimed to determine the antioxidant activity and anticancer properties of CN leaves extracts on human colorectal cancer cell lines, HCT 116 and HT-29. In this study, CN leaves powders were extracted in methanol, chloroform, and acetone at different durations. The crude extracts were assessed for total phenolic content (TPC), total flavonoid contents (TFC), 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity and MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) tetrazolium reduction assay. The extract using acetone showed with the highest TPC. The highest total flavonoid content was the methanol extract. The DPPH radical scavenging activity, IC50 of methanol extract was 19.67 µg/mL and exhibited the most efficacious antioxidant property among the others. The 24-hour methanol extract showed the most promising results on MTT assay. Therefore, CN methanol extract is a promising candidate to proceed in other anticancer studies such as cell cycle arrest and apoptosis assays

Chemical compositions and biological activities of essential oils of Beilschmiedia glabra

This study was designed to examine the chemical compositions of essential oils from Beilschmiedia glabra and their antioxidant, antimicrobial, antityrosinase, acetylcholinesterase and anti-inflammatory activities. In total, 47 components were identified in the essential oils, which made up 86.8% and 89.7% of the leaf and bark oils, respectively. The leaf oil is composed mainly of β-eudesmol (15.4%), β-selinene (12.2%), caryophyllene oxide (8.1%) and γ-gurjunene (5.2%), while the bark oil contains high percentages of β-eudesmol (19.3%), β-selinene (16.9%), δ-cadinene (15.8%), germacrene D (9.8%) and β-caryophyllene (5.5%). Antioxidant activity showed that the leaf oil has the highest phenolic content at 233.4 mg GA/g, while the bark oil showed potent activity in the β- carotene/linoleic acid bleaching assay. However, both oils showed weak activity in the DPPH and ABTS assays. For antimicrobial activity, the leaf and bark oils displayed strong activity against Candida glabrata and Saccharomyces cerevisiae with MIC values of 31.3 and 62.5 μg/mL, respectively. Percentage inhibitions against tyrosinase (leaf 73.7%; bark 76.0%) and acetylcholinesterase (leaf 48.1%; bark 45.2%) were tested at a concentration of 1 mg/mL, while anti-inflammatory activity (leaf 59.7%; bark 48.9%) was evaluated at a concentration of 100 μM. Evaluation of these assays indicated moderate levels of activity