Infectious disease is a serious health problem in the world of health. Escherichia coli causes diarrhea, Salmonella typhi causes typhoid fever, and Pseudomonas aeruginosa causes nosocomial infections which are Gram-negative pathogenic bacteria. Treatment with antibiotics is the therapy that is currently used, but other efforts in the use of herbal medicines are also being carried out in various studies. The purpose of this study was to analyze the antibacterial activity of the ethanolic extract of avocado leaves (Persea americana Mill.) against Escherichia coli, Salmonella typhi, and Pseudomonas aeruginosa. The method used is agar diffusion (Kirby-Bauer) with variations in the concentration of the test solution. The results showed that at a concentration of 500 mg/mL the three bacteria had an inhibition zone diameter of Escherichia coli with a value of 12.37±0.15 mm, Salmonella typhi with a value of 11.60±0.20 mm and Pseudomonas aeruginosa with a value of 10.87±0.15 mm. The ethanol extract of avocado leaves (Persea americana Mill.) showed antibacterial activity against three Gram-negative pathogenic bacteria.
Pseudomonas aeruginosa is a Gram-negative bacterium that can cause nosocomial infections. The use of antibiotics in the treatment of non-adherent P. aeruginosa infections increases the risk of antibiotic resistance. Efforts to find new antibiotic compounds from plants continue to be carried out. Papaya leaves are widely spread among the public, which are often used as ingredients for vegetables and have antibacterial potential because they contain papain enzymes and a class of flavonoid compounds. The purpose of this study was to analyze the antibacterial activity of the ethanol extract of papaya leaves (Carica papaya Linn.) against P. aeruginosa by finding the value of the Minimum Inhibitory Concentration (MIC) and calculating the index activity value against the positive control. The method used in this research is Kirby-Bauer (disc diffusion method) with several variations of the test concentration. The results showed that the diameter of the inhibition zone at a concentration of 500 mg/mL was in the strong category with an inhibition zone diameter of 10.87 ± 0.06 mm. MIC at a concentration of 3.125 mg/mL. The index activity value was greatest at a concentration of 500 mg/mL with a value of 0.668. So it can be concluded that the ethanol extract of papaya leaves (Carica papaya Linn.) has inhibitory activity against Pseudomonas aeruginosa.
BACKGROUND: Seri (Muntingia calabura L.) leaves are a plant that is often found and have not been used in various treatments even though it is reported to have various groups of bioactive compounds such as phenolic, flavonoids, tannins, saponins, steroids, and triterpenoids. AIM: This study aimed to determine the total phenolic content, antioxidant activity and identify the content of potential bioactive compounds contained in the ethyl acetate fraction from M. calabura leaves. METHODS: M. calabura L. leaves fraction was carried out by maceration method using ethanol followed by partition starting with n-hexane, chloroform, and finally ethyl acetate as solvent. The ethyl acetate fraction was continued for phytochemical screening for the content of bioactive compounds using standard reagents, determination of total phenol content by colorimetric method, determination of antioxidant activity using the DPPH method, and analysis of bioactive compounds using gas chromatography–mass spectroscopy. RESULTS: The results showed that the ethyl acetate fraction of M. calabura leaves was positive for phenolic content which was indicated by the formation of a turquoise color after 5% FeCl3 reagent was added (in ethanol), phenolic content was 0.0727 mg GAE/g dry fraction, indicating antioxidant activity (IC50) amounted to 54.437 including strong categories as antioxidants and the results of GC–MS analysis obtained various kinds of compounds and it is suspected that compounds that provide potential as antioxidants are phytol. CONCLUSION: The bioactive compound of ethyl acetate fraction of seri (M. calabura) leaves contained phenolic components and has strong antioxidant activity.
Pandan leaf (Pandanus amaryllifolius Roxb.) is a plant that grows wild, which belongs to the Pandanaceae tribe which is used as a natural medicine. The purpose of this study was to determine the antibacterial effectiveness of the handwashing soap formulation of pandan leaf extract against Salmonella sp bacteria and which concentration was the most effective. Extracts were made by maceration method using 96% ethanol as solvent. Formulation with mass 1 and mass 2. Testing of antibacterial effectiveness was carried out by diffusion method using disc paper. The results of the examination of the simplicia characterization of pandan leaves were determined to determine the water content of 0.1575%, the determination of the content of the water soluble extract was 0.1233%, the determination of the concentration of the soluble extract in ethanol was 0.0054%, the determination of the ash content of 0.1575%, the determination of the content of the acid insoluble extract. 0.0101%. Simplicia screening results contain alkaloids, flavonoids, tannins, saponins, and polyphenols. The yield of pandan leaf extraction is 90 g. The results of testing the effectiveness of Salmonella sp antibacterial on the diameter of the most effective inhibition zone was obtained at a concentration of 15% with a diameter of 22.70 mm. The results of the research, it can be concluded that the formulation of hand soap preparations with pandan leaf extract has antibacterial effectiveness against Salmonella sp.
Chitosan is a modified carbohydrate polymer obtained from the deacetylation of chitin and has good and unique characteristics, including its ability to be biodegradable, biocompatible, and nontoxic. The purpose of this study was to manufacture chitosan from freshwater lobster shells formulated in the form of a hand sanitizer gel that is stable and determine its antibacterial activity against Escherichia coli and Staphylococcus aureus. The chitosan obtained was then made into hand sanitizer gel preparations with concentrations of 1.5%, 3%, and 4.5%, and then an evaluation test was carried out on the hand sanitizer gel preparation, as well as antibacterial testing against E. coli and S. aureus. The results showed that the hand sanitizer preparation in the organoleptic test did not show any change in odor, shape, and color. The homogeneity test showed the absence of coarse granules. The results of the pH testing confirmed that the pH of the preparation was still within the permitted criteria limits. The dispersion test also showed the average is in the range of 5-7 cm so that the formula meets the requirements. The results of the antibacterial activity test of the chitosan hand sanitizer gel showed that it can inhibit E. coli bacteria with the best inhibition zone obtained at a concentration of 4.5% at 8.8 mm and S. aureus with the best inhibition zone at 10 mm.
One of the causes of acne is due to a bacterial infection such as Propionibacterium acnes during adolescent puberty. Empirical studies of secondary metabolites contained in Cep-cepan leaves have potential as promising antimicrobials. The main objective of this study was to determine the antibacterial activity of the ethanolic extract of Cep-cepan leaves formulated into a gel preparation against the bacteria Propionibacterium acnes that causes acne. This research method was carried out experimentally where the ethanol extract of cep-cepan leaves was formulated into a gel preparation consisting of (F1) control blank; (F2) 0.5%, (F3) 1%, (F4) 1.5% and positive control (Mediklin). The results of the evaluation of gel preparations at concentrations of 0.5%, 1%, and 1.5% were physically stable during storage at room temperature, homogeneous, and pH. Based on the results of testing the antibacterial activity of gel preparations in inhibiting bacterial growth at a concentration of 0.5% with an average inhibition zone diameter of 11.33 mm, a concentration of 1% with a value of 15.66 mm, a concentration of 1.5% with a value of 19.5 mm. The conclusion of this study is that the ethanol extract of cep-cepan leaves has promising antibacterial activity in the form of a gel formulation.
Liver cancer is a type of malignant cancer that causes many deaths in the world. Efforts to find natural ingredients that can be used to treat liver cancer are very important. This study investigated the anticancer activity of ethanol extract of Duku (Lansium domesticum) leaves (LDE) through the cytotoxic activity, cell cycle inhibition mechanism and apoptosis influence through the PI3K/Akt pathways. Secondary metabolites of LDE were determined by common qualitative method. Cell cycle arrest was carried out by flow cytometer at inhibitory concentration 50 (IC50), while the apoptosis test was obtained using double staining method. The IC50 value was used to identifying the expression of PI3K/Akt genes. The analyzed results were proven LDE can induce HepG2 cell death which IC50 value of 19.93 ± 0.93 μg/mL (ethanol extract), 267.06 ± 3.24 μg/mL (ethyl acetate extract), and 216.47 ± 2.87 μg/mL (n-hexane extract). Cell cycle arrest activity in HepG2 cells which IC50 value of ethanol extract of LDE occurs in S phase. Observation of apoptosis occurrence was obtained getting apoptosis in cell line. PI3K/Akt genes expression of ethanol extract of LDE was obtained using RT-PCR method. The bands density of PI3K/Akt at IC50 value treatment of 0.55 ± 0.02; 0.25 ± 0.01. The LDE was determined to contain secondary metabolites which can inhibit the growth of HepG2 cells through PI3K/Akt pathways. HIGHLIGHTS The ethanolic extract of Lansium domesticum leaves have the best cytotoxic activity against HepG2 cells line compared to ethyl acetate extract and n-hexane extract The ethanolic extract of Lansium domesticum leaves have anticancer activity against HepG2 cells line through cell cycle arrest and apoptosis induce The ethanolic extract of Lansium domesticum leaves can inhibit the expressions of PI3K/Akt/mTOR genes using RT-PCR GRAPHICAL ABSTRACT
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