Phytochemical Screening and Antibacterial Activity of Ethanolic Extract of Syzygium samarangense Leaves

oai:ojs2.jkk.kimia.unjani.ac.id:article/2The ethanolic extracts of S. samarangense leaves were examined for antibacterial activity in vitro using broth microdillution method. The extracts showed effective against Bacillus cereus, Salmonella enterica with MIC (minimum inhibition concentration) value 78 µg/ml and against multi strains of Escherichia coli, Enterobacter aerogenes, Kocuria rhizophila with MIC value 2500 µg/mL, 2500 µg/mL and 156 µg/mL. Phytochemical screening of S. samarangense was observed for the presence of tannins, alkaloids, flavonoids, and terpenoids

Molecular Docking of 6-shogaol and Curcumin on DNMT1 and LSD1 As Potential Agents for Thalassemia Treatment

Beta-thalassemia therapy is developed by increasing γ-globin production which binds to α-globin to form haemoglobin fetal (HbF). Meanwhile, DNA methyltransferase 1 (DNMT1) and lysine specific demethylase 1 (LSD1) play an important role in silencing the HbF gene by inhibiting the production of HbF and inducing haemoglobin subunit alpha (HbA) expression. 6-Shogaol and curcumin induce HbF by inhibiting signal transducer and activator of transcription 3 (STAT3) expression. Therefore, this study predicts the interaction between 6-shogaol and curcumin on DNMT1 and LSD1. The protein structure of DNMT1 (3SWR) and LSD1 (6KGP) was prepared by removing the water molecules, while the validation step was performed by separating protein from native ligands (sinefungin for 3SWR and flavine-adenine dinucleotide (FAD) for 6KGP) in new protein data bank files. Furthermore, the protein was docked with a native ligand to obtain grid box coordinates, while the root means standard deviation (RMSD) was calculated from the conformation results of the validation process. 6-Shogaol and curcumin were docked with coordinates of the validation results, and the best conformation was visualized with Discovery Studio. The validation step results in the RMSD value of 0.861Å and 1.410Å for DNMT1 and LSD1, respectively. The binding affinity of 6-shogaol and curcumin on DNMT1 was -6.5 kcal/mol and -8.0 kcal/mol, respectively. Furthermore, the binding affinity of 6-shogaol and curcumin on LSD1 was -8.2 kcal/mol and -10.1 kcal/mol, respectively. Amino acid residues found in DNMT1 interaction include Gly1147, Phe1145, Glu1168, Asn1278, Pro1225, Leu1151, Val1580, Ala1579, Asn1578, Trp1170, and Ala1579; meanwhile, Val288, Ser289, Arg310, Gly285, Thr624, Leu659, Lys661, Arg316, Leu625, Tyr761, Trp751, Gly330, and Leu659 were found in LSD1. This study showed that curcumin has the potential to inhibit DNMT1 as well as LSD1 proven by lower bonding energy and stronger bond types compared to sinefungin and FAD native ligands and other DNMT1 and LSD1 inhibitors

Phytochemical Screening and Antibacterial Test of Leaf Extract of Canar Susu (Smilax macrocarpa Blume) Against Eschercihia coli, Pseudomonas aeruginosa, and Staphylococcus epidermidis

Smilax adalah salah satu genus Smilacaceae yang banyak dimanfaatkan sebagai tumbuhan obat karena mengandung berbagai metabolit sekunder dengan beberapa bioaktivitas, seperti anti-inflamasi, antirematik, analgentik, antioksidan, antikanker dan antibakteri. Spesies Smilax yang belum pernah dikaji dan hanya tumbuh di Indonesia adalah Smilax macrocarpa Blume (canar susu). Penelitian bertujuan untuk  mengkaji karakteristik simplisia, kandungan fitokimia, beserta sifat toktsisitas dan antibakterinya dari ekstrak daun tumbuhan ini. Penelitian dilakukan dengan metode ekstraksi menggunakan teknik maserasi dengan pelarut metanol. Selanjutnya terhadap ekstrak S. macrocarpa Blume dilakukan karakteristik simplisia, uji toksisitas dengan metode BSLT, skrining fitokimia menurut metode Harborne, dan uji aktivitas antibakteri menggunakan metode mikrodilusi terhadap bakteri Escherihia coli, Pseudomonas aeruginosa, dan Staphylococcus epidermidis. Berdasarkan hasil yang diperoleh diketahui bahwa ekstrak metanol daun canar susu mengandung alkaloid, flavonoid, steroid, tanin, terpenoid, saponin dan glikosida. Kadar air, kadar abu, kadar abu tak larut asam, kadar sari air, dan kadar sari alkohol berturut-turut 8,74%; 3,60%; 0,11%; 19,01% dan 5,40%. Hasil toksisitas ekstrak diperoleh nilai LC50 sebesar 680,07 ppm. Pada uji aktivitas antibakteri terhadap E. coli memiliki nilai MIC 625 ppm, sedangkan pada P. aeruginosa dan S. epidermidis ATCC 12228 masing-masing 1.250 ppm. Adapun nilai MBC untuk E. coli, P. aeruginosa dan S. epidermidis ATCC 12228 masing-masing sebesar 5.000 ppm. Dari hasil ini canar susu tidak berpotensi sebagai antibakteri, tetapi bisa berpotensi sebagai biopestisida dilihat dari nilai toksisitasnya. Smilax is one of the genus Smilacaceae is widely used as a medicinal plant because it contains various secondary metabolites with some bioactivity, such as anti-inflammatory, antirheumatic, analgesic, antioxidant, anticancer and antibacterial. One species of Smilax that has not been studied and only grew in Indonesia is Smilax macrocarpa Blume (canar susu). Therefore, a preliminary study of phytochemicals and biological activities is required to encourage progress and novelty in science and to know its phylogenetics in Indonesia's biodiversity. The research was done by extraction method using maceration with methanol as a solvent. Simplicia characteristic, toxicity test with BSLT method, phytochemical screening according to Harborne method, and antibacterial activity test using microdilution against including Escherihia coli, Pseudomonas aeruginosa, and Staphylococcus epidermidis were performed to leaf extract of canar susu. The results obtained that methanol extract of canar susu leaves contains alkaloids, flavonoids, steroids, tannins, terpenoids, saponins, and glycosides. Water content, ash content, acid-soluble ash content, water sari content, and alcohol sari concentration 8.74%; 3.60%; 0.11%; 19.01% and 5.40% respectively. Toxicity results obtained LC50 680.07 ppm. Antibacterial activity test against E. coli has MIC 625 ppm, whereas in P. aeruginosa and S. epidermidis ATCC 12228 are 1.250 ppm. The MBC values for E. coli, P. aeruginosa, and S. epidermidis ATCC 12228 were 5,000 ppm. Based on this result known S. macrocarpa Blume is not potential as antibacterial, but potential as biopesticide according to toxicity result.&nbsp

THE EFFECT OF CIPLUKAN EXTRACT (Physalis angulata L.) AS ANTIPSORIATIC AND TO LYMPHOCYTES COUNT OF SKIN TISSUE IN PSORIASIS MICE MODEL

ABSTRACT Psoriasis is a chronic skin disease in form of papule-shaped lesion and erythematous plaques with thick white scales. The pathogenesis of psoriasis involves IL-23/Th-17 cytokine pathway that contributes the activation of T-lymphocytes and proinflammatory cytokines. Treatment of psoriasis using methotrexate has inhibitory effect of the synthesis of nucleic acid towards T-lymphocytes and keratinocytes. Ciplukan (Physalis angulata L.) has anti-inflammatory potential effect which contains steroid, flavonoid, alkaloid, and physalin that may inhibit lymphocyte activation and proinflammatory cytokine production. The study is used the method of experimental study with post test only with control group design. Thirty five female mices were divided into 7 groups. The parameters of this study is anti-psoriatic (PASI and Baker’s score) and lymphocytes count in psoriasis mice model. The results of Kruskal-Wallis, PASI and Baker’s score showed that p=0,001 (p<0,05) and the result of lymphocytes count using One Way ANOVA showed that p=0,001 (p<0,05). The 800 mg/kgBW dose of ciplukan extract showed the largest decrease on PASI score and lymphocytes count, and the 1200 mg/kgBW dose one showed the largest decrease on the Baker’s score. The present of the 800 mg/kgBW dose of ciplukan extract  gives the most optimal effect in reducing PASI score and skin tissue lymphocytes count in psoriasis mice model that were not significantly different with the treatment control group, while 1200 mg/kgBW dose one gives the most optimal effect in reducing Baker’s score that were significantly different with the treatment control group.   Keywords: Ciplukan extract, lymphocytes, methotrexate, Physalis angulata

Isolasi dan Karakterisasi Senyawa Non Fenolik dari Daun Gowok (Syzygium polycephalum Miq.)

Syzygium polychepalum (gowok) merupakan salah satu tanaman yang sering digunakan sebagai obat tradisional di Indonesia. Penelitian ini bertujuan untuk melakukan kajian fitokimia terhadap daun gowok yang berasal dari Purwokerto. Ekstraksi dilakukan dengan cara maserasi, sedangkan fraksinasi dan pemurnian dilakukan dengan metode kromatografi vakum cair dan gravitasi. Karakterisasi senyawa hasil isolasi dilakukan dengan menggunakan metode spektroskopi 1H-NMR dan GC-MS. Hasil karakterisasi menunjukkan bahwa isolat merupakan senyawa asam lemak jenuh yaitu asam heksadekanoat dan 3-etilpropanoat

Free Chlorine Determination in Disinfectant Product using Visible Spectrophotometry based on Prussian Blue Degradation

Disinfectant products with excessive chlorine could be dangerous for health and need quality control. It is important to develop an analytical method for monitoring product quality. The main objective of this work is to develop an alternative method and evaluate the analytical performance of visible spectrophotometry for determining free chlorine in disinfectant products based on the Prussian blue decomposition process. The capability of chlorine to oxidize ferrous to ferric ions makes the Prussian blue generated by ferrosulfate and potassium ferricyanide is decomposed and measured by spectrophotometer. The formation of Prussian blue was improved by optimizing some reaction conditions and assessing incubation time. Linearity, analytical concentration range, precision, accuracy, detection limit, and quantitation limit parameters were among the examined analytical parameters. The results showed that the optimum concentration of ferrosulfate, potassium ferysianide, and hydrochloric acid for Prussian blue formation was 2.0 mmol L-1, 3.0 mmol L-1, and 0.5 mol L-1, respectively, with 15 minutes incubation time after chlorine addition. Analytical performance parameters seemed appropriate for routine analysis purposes. The developed method can also be applied as an alternative analytical method to determine the free chlorine concentration of disinfection products in the market

Antibacterial activity of two isolated endophytic extracts assosiated with Indonesian mangrove plant Rhizophora mucronata

Endophytic fungi are microorganisms reside in the living tissues of the host plant. This fungi can contribute to provide protection to the host from the infection caused by another microorganism. The one reasonable strategy to discover a new antibacterial agent from endophytic fungi are from the plant which lived in special condition such Rhizophora mucronata. The aim of this research is to determine antibacterial activity of the endophytic fungi extracts assosiated with Rhizophora mucronata from Sagara anakan. The isolated endophytic fungi was identified as Neopestalotiopsis sp. and Peniophora lycii using molecular analysis method. The antibacterial activity was carried out by using microdillution method. The antibacterial properties from mycelium extracts showed moderate to low antibacterial activity with Minimum Inhibitory Consentration (MIC) values of 125-500 µg mL-1 against Eshcerichia coli ATCC 25922 and Staphylococcus aureus ATCC 25923 bacteria. The n-hexane extract of both endophytic fungi shows the strongest antibacterial activity against Escherichia coli with MIC values of 125 µg mL-

<p>Efek antibakteri ekstrak larva Chrysomya megacephala terhadap Enterococcus faecalis sebagai alternatif bahan irigasi saluran akar</p><p>Antibacterial effect of Chrysomya megacephala larva extract on Enterococcus faecalis as a root canal irrigant alternative</p>

Pendahuluan: Desinfeksi saluran akar dilakukan dengan mengaplikasikan bahan irigasi saluran akar pada perawatan endodontik. Selama ini, natrium hipoklorit (NaOCl) menjadi protokol bahan irigasi saluran akar karena bersifat antimikroba. Penggunaan NaOCl memiliki kekurangan karena kurang adekuat dalam mengeliminasi bakteri persisten dalam saluran akar gigi, seperti Enterococcus faecalis. Upaya pengeliminasian E. faecalis yang dapat dilakukan yakni dengan mengkombinasikan NaOCl dengan bahan irigasi lain atau menggunakan bahan alternatif lain. Salah satu bahan alam yang memiliki efek antibakteri adalah ektrak larva dari lalat hijau (Chrysomya megacephala). Produk eksretori dan sekretori larva instar ke-3 C. megacephala mengandung protease serin yang memiliki efek antibakteri. Tujuan penelitian untuk menganalisis efek antibakteri ekstrak larva C. megacephala dalam menghambat pertumbuhan E. faecalis. Metode: Jenis penelitian eksperimental laboratorium. Ekstrak larva C. megacephala dibuat dengan konsentrasi 0-100%. Efek antibakteri diketahui dengan pengukuran nilai Minimal Inhibitory Concentration (MIC) dan Minimal Bactericidal Concentration (MBC). Nilai MIC diukur dengan metode pengenceran microbroth dalam cawan microtiter 96-well. Nilai MBC diukur dari hasil pengukuran MIC yang di-plating pada media kultur Mueller Hinton Agar (MHA) dengan metode total counting. Hasil: Nilai MIC diperoleh pada ekstrak larva 50% (0,5x106mg/L) (p>0,05) sedangkan nilai MBC tidak ditemukan. Simpulan: Ekstrak larva C. Megacephala tidak memiliki efek yang dapat menghambat pertumbuhan Enterococcus faecalis. Kata kunci: Antibakteri, natrium hipoklorit, Chrysomya megacephala, Enterococcus faecalis.   ABSTRACT Introduction: In endodontic treatment, the root canal is disinfected by applying root canal irrigant. Commonly, sodium hypochlorite (NaOCl) is used as the protocol of the root canal irrigant due to its antimicrobial effects. The usage of NaOCl has limitation because it is inadequate in eliminating persistent bacteria in the root canal, such as Enterococcus faecalis. The effort to eliminate E. faecalis is by combining NaOCl with other irrigant or using an alternative material. One of the natural products with antibacterial effects is the larva extract of greenfly (Chrysomya megacephala). The excretory and secretory products of the third instar of the larva contain serine protease that has been known for the antibacterial effects. The purpose of this study was to analyse the antibacterial effect of Chrysomya megacephala larva extract in inhibiting the E. faecalis bacteria. Methods: Experimental laboratory research was conducted towards an extract of C. megacephala larva, which was prepared with a concentration of 0-100%. The antibacterial effect was determined by measuring the value of Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC). The MIC values were measured by the micro broth dilution method in a 96-well microtiter dish. The MBC value was measured from the results of the MIC measurement plated on the Mueller Hinton Agar (MHA) culture media using the total counting method. Results: The MIC values obtained in 50% larva extract was 0.5x106mg / L (p > 0.05) while the MBC value was not found. Conclusion: Chrysomya megacephala larva extract does not have the effect in inhibiting the Enterococcus faecalis. Keywords: Antibacterial, sodium hypochlorite, Chrysomya megacephala, Enterococcus faecalis

GC-MS Analysis and Antibacterial Activity of Essential Oils of Five Syzygium Species Leaves

The essential oil can inhibit pathogenic bacterial activities, which can be developed to be a natural preservative for food. This research aimed to evaluate the antibacterial activity of the essential oils from five species Syzygium on Bacillus cereus, Escherichia coli, Listeria monocytogenes, Staphylococcus aureus, and Salmonella enterica sv Typhimurium. The research results show that five Syzygium sp. Essential oils have moderate antibacterial properties with a minimum inhibitory concentration (MIC) value of 250 ‒ 500 μg/mL. S. polyanthum essential oils have the highest antibacterial activity than the rest species on B. cereus at 250 μg/mL. Meanwhile, the essential oil of S. polycephalum also showed the highest antibacterial activity with a MIC value of 250 μg/mL against L. monocytogenes. The chemical component analysis using GC-MS shows the main constituents farnesol, nerolidol, and n-decanal, presenting the antibacterial effect