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.

Dual-excitation and dual-emission carbon dots for Fe3+ detection, temperature sensing, and lysosome targeting

Dual-excitation and dual-emission carbon dots (CDs) have been prepared by simple one-step hydrothermal treatment of p-phenylenediamine and 5-aminosalicylic acid. As-prepared CDs emit bright green fluorescence under the excitation of 320...

Close-up on a bacterial informational war in the geocaulosphere

The geocaulosphere is home to microbes that establish communication between themselves and others that disrupt them. These cell-to-cell communication systems are based on the synthesis and perception of signaling molecules, of which the best known belong to the N-acyl-homoserine lactone (AHL) family. Among indigenous bacteria, certain Gram-positive actinobacteria can sense AHLs produced by soft-rot Gram-negative phytopathogens and can degrade the quorum-sensing AHL signals to impair the expression of virulence factors. We mimicked this interaction by introducing dual-color reporter strains suitable for monitoring both the location of the cells and their quorum-sensing and -quenching activities, in potato tubers. The exchange of AHL signals within the pathogen’s cell quorum was clearly detected by the presence of bright green fluorescence instead of blue in a portion of Pectobacterium-tagged cells. This phenomenon in Rhodococcus cells was accompanied by a change from red fluorescence to orange, showing that the disappearance of signaling molecules is due to rhodococcal AHL degradation rather than the inhibition of AHL production. Rhodococci are victorious in this fight for the control of AHL-based communication, as their jamming activity is powerful enough to prevent the onset of disease symptoms.

Detection of the Potential Adulterant Teucrium chamaedrys in Scutellaria baicalensis Raw Material and Extract by High-Performance Thin-Layer Chromatography

Teucrium chamaedrys (Gemander) has been reported as an adulterant of Scutellaria lateriflora (American skullcap) herbal preparations and is also known to be hepatotoxic. A quick and simple high-performance thin-layer chromatographic (HPTLC) method was developed for the detection of T. chamaedrys (Germander) in S. baicalensis (Chinese skullcap) extract, an ingredient of the proprietary blend product, Univestin. The HPTLC profile of T. chamaedrys was distinguished from that of S. baicalensis by its bright green fluorescence bands. This simple method can be completed in an hour for the quality control of Univestin and its raw material, S. baicalensis. The method is sensitive and can detect T. chamaedrys at levels as low as 0.5 (w/w).

Green fluorescence from the hair of Lindow Man

It has been suggested that the bright green fluorescence shown by the hair of Lindow Man II is due to the use of copper-based pigments for body decoration. However, scientific analysis shows that this fluorescence is due to a natural reaction of the hair keratin with acid in the peat in which the body was buried.