Apoptotic Activity of New Oxisterigmatocystin Derivatives from the Marine-Derived Fungus Aspergillus nomius NC06

Sponge-derived fungi have recently attracted attention as an important source of interesting bioactive compounds. Aspergillus nomius NC06 was isolated from the marine sponge Neopetrosia chaliniformis. This fungus was cultured on rice medium and yielded four compounds including three new oxisterigmatocystins, namely, J, K, and L (1, 2, and 3), and one known compound, aspergillicin A (4). Structures of the compounds were elucidated by 1D and 2D NMR spectroscopy and by high-resolution mass spectrometry. The isolated compounds were tested for cytotoxic activity against HT 29 colon cancer cells, where compounds 1, 2, and 4 exhibited IC50 values of 1.21, 2.23, and 5.62 µg/mL, respectively. Under the fluorescence microscope by using a double staining method, HT 29 cells were observed to be viable, apoptotic, and necrotic after treatment with the cytotoxic compounds 1, 2, and 4. The result shows that compounds 1 and 2 were able to induce apoptosis and cell death in HT 29 cells.

Morphological, anatomical and antibacterial characteristics of Leonotis nepetifolia plants growing in Binh Thuan Province, Vietnam

Lion's ear [Leonotis nepetifolia (L.) R. Br.] is a Vietnamese medicinal plant that has been described in basic morphology and isolated for a number of chemical compounds. This study aims to supplement a database of morphology, micro-anatomy and antibacterial abilities of this species. Micro-anatomical analysis was based on a double staining method microscopic dimensional measurement of plant. The antibacterial capacity was based on the diameter of the inhibitory zone. The results showed that the plant had the characteristics of adapting to the dry and light conditions of the region. Leaf extract at the content of 4.8 to 8.0 mg had the best inhibitory ability on 5 strains of bacteria B. cereus, S. aureus, E. faecalis, P. aeruginosa, and E. coli. The inhibition zone diameters were 0.27, 10.33, 5.00, 3.80 and 2.23 mm, respectively.

Study on the Mechanism of Targeted Poly(lactic-co-glycolic acid) Nano-Delivery Carriers in the Treatment of Hemangiomas

Hemangiomas, also called infantile hemangiomas (IH), are the most common congenital benign vascular tumors in infants and young children. At present, there are many treatment methods for proliferative hemangiomas, which have different effects and lack predictability. Propranolol has gradually replaced glucocorticoids as the first-line treatment for infants and young children with hemangiomas. However, premature discontinuation is prone to relapse, and the efficacy and safety of medication need to be further studied and determined. The exact pathogenesis of hemangiomas is still unclear. Therefore, in this study, poly(lactic-co-glycolic acid) (PLGA) nanoparticles were used as drug delivery carriers, propranolol was encapsulated, and PLGA-propranolol (PLGA-PP) nanodelivery preparations were prepared and targeted. Anisotropy and pharmacokinetics were preliminary studied. At the same time, after the treatment of HemECs cells with PLGA-PP in gradient concentration in vitro, CCK-8 method was used to detect the cell proliferation, and Anyixin-V/PI double staining method was used to detect the apoptosis rate of cells. The effect of PLGA-PP nano-delivery vector on hemangioma was studied by western blot method to detect the expression level of Id-1 protein in HemECs. The results showed that after PLGA-PP treated HemECs for 24 h, PLGA-PP significantly inhibited HeECs proliferation and promoted their apoptosis, and the intracellular Id-1 protein expression was also reduced. Therefore, this study believes that the mechanism of PLGA-PP nano-targeted delivery preparations in the treatment of hemangiomas is achieved by down-regulating the Id-1 gene, thereby inhibiting the colonization of HemECs and promoting its apoptosis effect.

INDUCED BREAST CANCER MCF-7 CELLS APOPTOSIS FROM EXTRACT COMBINATION OF JENGKOL PODS (Archidendron jiringa) AND PETAI CINA LEAVES (Leucaena leucocephala)

The jengkol pod exocarp and petai cina leaves potentially as breast anticancer due to its highly toxic. The activity of cytotoxicity to the MCF-7 cells by the combination of jengkol pod exocarp and petai cina leaves is included in the potential category. The research aimed to determine the influence of the combination of jengkol pod exocarp and petai cina leaves on induction of the MCF-7 breast cancer apoptosis. Induction cell apoptosis of MCF-7 from a combination of extracts by using a double staining method. The cytotoxicity test from the extract combination of jengkol pod exocarp and petai cina leaves was determined by the MTT method. The extracts were made by comparing the mass of jengkol pod exocarp and petai cina leaves with comparisons of 5:1, 7:1, and 9:1. The IC50 values of the combination of jengkol pod exocarp and petai cina leave the ratio of 5:1, 7:1, and 9:1 were 11.7; 7.5; and 1.9 ppm, respectively. Apoptosis activity of the extract combination of the double staining test results showed MCF-7 cells experiencing orange and bright green fluorescence. The cellular form becomes wrinkled from the initial condition of the cell. Based on the results of the study showed a combination of jengkol pod exocarp and petai cina leaves could induce the MCF-7 breast cancer apoptosis cell.

Extract of ceplukan (Physalis angulata L.) inhibited proliferation and induced apoptosis in myeloma cell line

Cancer is one of the main causes of death globally. Thus, research to develop a new cancer drug is still ongoing. Physallis angulata L. (ceplukan) is one of the Indonesian plants that has been shown to display anti-cancer activity. This research aimed to examine the cytotoxic effect of ethanol extract of P. angulata L., the effect on cell proliferation and the apoptosis-inducing ability against myeloma cells. P. angulata L. plant was extracted using 96% ethanol. The observations of the cytotoxic effect of extract and the proliferation of myeloma cells were done by MTT assay. The effect of the extract on apoptosis was determined by double staining method using ethidium bromide-acridine orange. Markers for apoptosis were measured by immunocytochemistry test. The results showed that the extract of P. angulata exhibited cytotoxic effects on myeloma cells with an IC50 value of 70.92 µg/ml. The extract inhibited the proliferation of myeloma cells and induced apoptosis in myeloma cancer cells by upregulating the expression of p53 and Bax. This result suggested that ethanolic extract of P. angulata L. had the potential to be developed as blood cancer drug. Further study on the isolation of the bioactive compound and in vivo mechanism is in progress.

The Cytotoxic and Apoptosis Effects of Chloroform Extracts of Auricularia auricula on Cervical Cancer Cells

Auricularia auricula is an edible mushroom cultivated in Indonesia that has been known to have potential properties of bioactive compounds than can be used for medicinal purpose. This study aimed to examine the cytotoxic and apoptosis effect of chloroform extract of A. auricula on cervical cancer cells in vitro. The research design was in vitro experimental research. Cytotoxic tests was using an MTT [3-(4,5-dimetiltiazol-2-yl)-2.5-diphenyl tertrazolium bromide] assay and apoptosis test was using double staining method. Test of bioactive compounds was carried out using GCMS. Cytotoxic effect were analyzed by linear regression and apoptosis test was analyzed descriptively. Chloroform extract of mycelium A. auricula showed the best results with IC50 = 264.87 µg/ml. An important finding obtained after the double staining process was that chloroform extract of A. auricula can induce HeLa cells death by apoptosis. GCMS test results showed that the extracts containing limonene and piperidinone which are the anticancer bioactive compounds. In conclusion, the chloroform extracts of A. auricula has the potential to inhibit the growth of cervical cancer cells. The benefit of this study are expected to provide information about the anticancer potential of extract of A. auricula against cervical cancer cells, thus contributing to the development of alternative anticancer treatments from natural product.

Evaluation of The Genotoxicity of Three Food Additives using CHO-K1 Cells under in vitro Micronucleus Flow Cytometry Assay

Exposure of genotoxic substances come from various sources such as food additives. The aim of this study is to evaluate the genotoxicity of food additives in CHO-K1 cells by micronucleus test flow cytometry. The food additives: sodium saccharine (SS), monosodium glutamate (MSG), and sodium benzoate (SB) were assessed by in vitro cytotoxicity and genotoxicity using Chinese Hamster Ovary-K1 (CHO-K1) cells. The cytotoxic effect of those compounds was evaluated by MTT Assay on CHO-K1 Cells. The genotoxic evaluation was observed by in vitro micronucleus test by flowcytometry with double staining method. The results showed that the three compounds did not perform cytotoxic effect, increased the frequency of micronucleus, and changed the cell cycle profiles. In general, these studies obtained that none of three food additives showed cytotoxic and genotoxic effect on CHO-K1 cells. Micronucleus test using flow cytometry is suitable for this purpose study.Key words : food additives, genotoxic, cytotoxic, micronucleus