@article {1796, title = {Effective Enzyme-Producing Bacteria Isolated from Diversified Thai Rice and Native Thai Bees (Cavity Nesting Honey Bees) and their Potential for Production of Protease Enzymes}, journal = {Pharmacognosy Journal}, volume = {14}, year = {2022}, month = {June 2022}, pages = {506-517}, type = {Original Article}, chapter = {506}, abstract = {

Background: Thailand is one of the most bio-diversified countries in Southeast Asia, especially regarding plants, animals and microbes that impact directly on human and animal life. Methods: Of the 201 bacterial isolates that were screened from Thai rice and bees in Ratchaburi and Chiang Mai provinces, Thailand, most were classified in the genus Bacillus. Result: From the morphological test and 16S ribosomal DNA sequence study, three strains, Bacillus flexus KRptI_S2, Microbacterium paraoxydans C13HN2 and Paenibacillus hunanensis KRrb_T2, could produce amylase and protease enzyme and non-hemolytic activity at higher temperature. The highest enzymatic activity of protease was produced by P. hunanensis KRrb_T2 (378.9967{\textpm}1.335 U.mL-1) at 36 h. Conclusion: In summary, the bacteria from Thai rice and bees could be potential suitable sources of protease production for development by the food and beverage industries globally.

}, keywords = {Bacteria, Bees, Biodiversity, Protease Enzyme, Rice.}, doi = {10.5530/pj.2022.14.64}, author = {Thapakorn Chumphon and Yaowanoot Promnuan and Sujinan Meelai and Saran Promsai} } @article {1637, title = {Antibacterial Activities of Cationic Porphyrins and Porphyrin Encapsulated Gold Nanorods on Bacterial Cell Lines}, journal = {Pharmacognosy Journal}, volume = {13}, year = {2021}, month = {September 2021}, pages = {1086-1096}, type = {Original Article}, chapter = {1086}, abstract = {

Bacterial infections form part of the major causes of mortality and morbidity around the world more especially in developing and under-developed countries. Cationic porphyrins have been reported to display better efficacy in antimicrobial photodynamic therapy activity. The purpose of this study was to synthesise the cationic porphyrins; (TAP) and (TPyP) and evaluate their pharmacokinetics and metabolic interactions with the DNA gyrase subunit A. The antibacterial activity of the nano-conjugates was evaluated against Staphylococcus aureus (ATCC 25925), Enterococcus faecalis (ATCC 29212) and Klebsiella pneumoniae (ATCC 4352) using the micro-dilution assay without light. AutoDock Vina was used to assess the molecular interactions between ligands and the DNA gyrase subunit A. The SwissADME online tool was used to assess the pharmacokinetic properties of the nano-conjugates, while the ADMETlab online tool was used to assess the ability to inhibit the hERG gene, human hepatotoxicity and mutagenicity. The test nano-conjugates showed broad-spectrum antibacterial activity against all tested bacterial strains with the MIC values in a range of 0.42 {\textpm} 0.1 to2.6 {\textpm} 0.7 mg/ml. The nano-conjugates revealed good molecular interaction with DNA gyrase subunit A with their binding free energy in the range of -8.3 to -8.7 kcal/ mol. They are predicted to be P-glycoprotein (P-gp) substrates, able to penetrate the blood-brain barrier and non-inhibitors of cytochrome P450 (CYP) isomers (CYP 2C19, CYP 2C9 and CYP 2D6). Both nanoconjugates have the potential to cause cardiotoxic and mutagenic effects but not hepatotoxic effects. The results show that the synthesized compounds have the potential as anti-bacterial PDT agents.

}, keywords = {Antimicrobial, Bacteria, Porphyrin}, doi = {10.5530/pj.2021.13.141}, author = {Hlapisi N and Maliehe TS and Oluwafemi OS and Songca SP and Linganiso L and Motaung TE} } @article {1117, title = {Phytochemical Compounds in Arundo donax L. Rhizome and Antimicrobial Activities}, journal = {Pharmacognosy Journal}, volume = {12}, year = {2020}, month = {March 2020}, pages = {287-292}, type = {Original Article}, chapter = {287}, abstract = {

Introduction: The aerial part of Arundo donax L., giant reed, is a well-known fuel source used in many countries. Methods: Phytochemical compounds in A. donax L. rhizome, sequentially extracted with hexane (HEX), dichloromethane (DCM), ethyl acetate (EA), and methanol (MeOH), were identified using gas chromatography-mass spectrometry. Antimicrobial activities of the rhizome extracts were evaluated using disc diffusion assay against yeast (Candida albicans), and bacteria Gram-positive (Staphylococcus aureus ATCC 25923, Bacillus cereus ATCC11778, and Bacillus subtilis ATCC6633) and Gram-negative (Escherichia coli ATCC25922). Results: The detected phytochemicals were screened against WILEY07 library; 84 compounds matched with a similarity >= 90\%. All the characterized compounds were grouped based on their functional group. The major phytochemicals in the HEX, DCM, and EA extracts belonged to sterol groups, while lipids, fatty acids, and related conjugates were the main components of the methanolic extract. The other characterized compounds were hydrocarbons, phenolics, terpenoids, xanthones, and xanthene. Growth of B. subtilis was inhibited by the HEX, DCM, EA, and MeOH extracts, whereas B. cereus growth was inhibited only by the DCM and EA extracts. However, growth of E. coli and C. albicans could be not inhibited by A. donax L. rhizome extracts. Analysis of the compounds as well as their antibacterial activities via hierarchical clustering showed that hexadecanoic acid is the major compound influencing B. subtilis growth, while, B. cereus growth was affected by xanthone. Conclusions: Rhizomes of A. donax L. is one potential source of antimicrobial agents and further applied in medicinal uses.

}, keywords = {Bacteria, GC-MS, Giant reed, HCA}, doi = {10.5530/pj.2020.12.45}, author = {Kanoktip Pansuksan and Sophida Sukprasert and Netiya Karaket} } @article {924, title = {Antibacterial Activity of Coastal Plants and Marine Sponges from Kei Island Indonesia against Bacterial Fish Pathogens}, journal = {Pharmacognosy Journal}, volume = {11}, year = {2019}, month = {July 2019}, pages = {812-817}, type = {Original Article}, chapter = {812}, abstract = {

Objective: The objective of this study was to investigate the antibacterial activity of coastal plants and marine sponges extracts against fish bacterial pathogens. Methods: Samples were extracted by maceration and the extracts were examined for their antibacterial activities against Streptococcus sp. BJ0509, Staphylococcus aureus ATCC 6538, Aeromonas hydrophila BA03 and Vibrio parahaemolyticus 29S by means of paper disc diffusion method. Active extracts were partitioned and purified by column chromatography. The purified substance was tested for Minimum Inhibitory Concentration (MIC) against seven bacterial fish pathogens namely Streptococcus sp., Vibrio parahaemolyticus, V. alginolyticus, V. harveyi, Photobacterium damselae, Aeromonas hydrophila and A. dhakensis. Results: The highest antibacterial activity against all bacteria used in the assay was demonstrated by OKA 6, a bark extract sample of a coastal plant, Diospyros maritima. It showed a diameter of inhibition zones against Streptococcus sp. BJ0509, S. aureus ATCC 6538, A. hydrophila BA03 and V. parahaemolyticus 29S of 19, 33, 18, and 18 mm, respectively. The column chromatography fraction of OKA 6 inhibited the growth of S. aureus ATCC 6538 with MIC of 3.125 μg/mL. The MIC of this fraction against seven bacterial fish pathogens ranged \< 0.098 to 3.125 μg/mL. The antibacterial activity of partially purified substance obtained from column chromatography fractionation of OKA 6 was higher than those of oxytetracycline and kanamycin. Conclusions: This result indicates that antibacterial activity of the partially purified substance is potentially higher than those of the commercial antibiotics tested. It further indicates that OKA 6 extract from D. maritima can serve as a promising resource for the development of therapeutic agents against bacterial infections in aquaculture.

}, keywords = {Antibacterial activity, Bacteria, Coastal plant, Fish pathogen, Marine sponge, Secondary metabolite}, doi = {10.5530/pj.2019.11.130}, author = {Andi Hamdillah and Alim Isnansetyo and Indah Istiqomah and Indun Dewi Puspita and Desy Putri Handayani and Takushi Kaneko} }