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Rahmadiawan D, Abral H, Chayri Iby I, Kim HJ, Ryu KH, Kwack HW, Razan Railis M, Sugiarti E, Novi Muslimin A, Handayani D, Dwinatrana K, Shi SC, Zainul R, Azis Nabawi R. Effect of post-heat treatment on the UV transmittance, hydrophobicity, and tensile properties of PVA/ Uncaria gambir extract blend films. Heliyon 2024; 10:e30748. [PMID: 38774319 PMCID: PMC11107212 DOI: 10.1016/j.heliyon.2024.e30748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 04/30/2024] [Accepted: 05/03/2024] [Indexed: 05/24/2024] Open
Abstract
The physical and mechanical properties of biopolymers can be improved by heating technologies. In this research, we improved the properties of Polyvinyl alcohol (PVA)/Uncaria gambir extract (UGE) blend films by post-heating method. After post-heating, the blend film exhibited higher resistance to UV light and improved contact angle performance, while water vapor permeability and moisture absorption decreased. The tensile strength and toughness of the PVA/UGE blend film with a post-heating duration of 40 min were 68.8 MPa and 57.7 MPa, respectively, an increase of 131 % and 127 %, compared to films without post-heating. This facile and cost-effective fabrication method, with environmentally friendly properties, can be applied to biodegradable PVA/UGE blend films to achieve desired properties for optical devices or food packaging materials.
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Affiliation(s)
- Dieter Rahmadiawan
- Department of Mechanical Engineering, National Cheng Kung University (NCKU), Tainan, Taiwan
- Department of Mechanical Engineering, Universitas Negeri Padang, Padang, 25173, West Sumatera, Indonesia
| | - Hairul Abral
- Laboratory of Nanoscience and Technology, Department of Mechanical Engineering, Andalas University, Padang, 25163, West Sumatera, Indonesia
- Research Collaboration Center for Nanocellulose, BRIN-Andalas University, Padang, 25163, West Sumatera, Indonesia
| | - Ilham Chayri Iby
- Laboratory of Nanoscience and Technology, Department of Mechanical Engineering, Andalas University, Padang, 25163, West Sumatera, Indonesia
| | - Hyun-Joong Kim
- Research Institute of Agriculture and Life Sciences, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul, 08826, Republic of Korea
- Department of Agriculture, Forestry and Bioresources, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Kwang-Hyun Ryu
- Department of Agriculture, Forestry and Bioresources, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Ho-Wook Kwack
- Department of Agriculture, Forestry and Bioresources, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Muhammad Razan Railis
- Department of Engineering Management, Batam Institute of Technology, Batam, 29425, Indonesia
| | - Eni Sugiarti
- Research Center for Biomass and Bioproducts, National Research and Innovation Agency (BRIN), Cibinong Science Center, West Java, 16911, Indonesia
| | - Ahmad Novi Muslimin
- Research Center for Biomass and Bioproducts, National Research and Innovation Agency (BRIN), Cibinong Science Center, West Java, 16911, Indonesia
| | - Dian Handayani
- Laboratory of Sumatran Biota, Faculty of Pharmacy, Andalas University, Padang, 25163, West Sumatera, Indonesia
| | - Khiky Dwinatrana
- Laboratory of Sumatran Biota, Faculty of Pharmacy, Andalas University, Padang, 25163, West Sumatera, Indonesia
| | - Shih-Chen Shi
- Department of Mechanical Engineering, National Cheng Kung University (NCKU), Tainan, Taiwan
| | - Rahadian Zainul
- Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Negeri Padang, West Sumatera, 25171, Indonesia
| | - Rahmat Azis Nabawi
- Department of Mechanical Engineering, Universitas Negeri Padang, Padang, 25173, West Sumatera, Indonesia
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Huang L, Wang ZM, Zhao Q, Li HJ, Wu YC. Chemical constituents from Uncaria laevigata and their anti-inflammatory activities and action mechanism. Nat Prod Res 2024:1-5. [PMID: 38189342 DOI: 10.1080/14786419.2023.2301470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 12/28/2023] [Indexed: 01/09/2024]
Abstract
A new alkaloid 1* (scandine Z) and fourteen known natural products were isolated from 95% ethanol extract of Uncaria laevigata for the first time. Besides compound 1*, these fourteen compounds were firstly isolated from Uncaria laevigata. Excitedly, compound 4 exhibited strong anti-inflammatory activity (IC50 = 8.12 μmol/L), which wasn't described before. Moreover, compound 1* also de--monstrated certain anti-inflammatory activity (IC50 = 10.34 μmol/L). Network pharmacology suggested that compound 4 was involved in the IL-17 signalling pathway and the regulation of inflammation pathway. Molecular docking confirmed that it showed strong binding activity with the target protein (peroxisome proliferator-activated receptor γ, PPAR). Overall, compounds 1* and 4 exhibited strong anti-inflammatory activity and served as lead compounds and anti-inflammatory molecules for further study in vivo.
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Affiliation(s)
- Li Huang
- Weihai Marine Organism & Medical Technology Research Institute, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, P. R. China
| | - Zi-Ming Wang
- The Second People's Hospital of Baoshan City, Baoshan, P. R. China
| | - Qing Zhao
- School of Chinese Materia Medica, Yunnan University of Traditional Chinese Medicine, Kunming, P. R. China
| | - Hui-Jing Li
- Weihai Marine Organism & Medical Technology Research Institute, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, P. R. China
| | - Yan-Chao Wu
- Weihai Marine Organism & Medical Technology Research Institute, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, P. R. China
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Jeong JY, Jung IG, Yum SH, Hwang YJ. In Vitro Synergistic Inhibitory Effects of Plant Extract Combinations on Bacterial Growth of Methicillin-Resistant Staphylococcus aureus. Pharmaceuticals (Basel) 2023; 16:1491. [PMID: 37895962 PMCID: PMC10610001 DOI: 10.3390/ph16101491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 10/13/2023] [Accepted: 10/18/2023] [Indexed: 10/29/2023] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is one of the most common pathogens of healthcare-associated infections. Medicinal plants have long been used in the traditional treatment of diseases or syndromes worldwide. Combined use of plant extracts could improve the effectiveness of pharmacological action by obtaining synergism, acting on multiple targets simultaneously, reducing the doses of individual components, and minimizing side effects. We aimed to investigate the synergistic inhibitory effects of selected medicinal plants (Caesalpinia sappan L. (CS), Glycyrrhiza uralensis Fisch. (GU), Sanguisorba officinalis L. (SO), and Uncaria gambir Roxb. (UG)) on the bacterial growth of MRSA and its clinical isolates. SO and UG extracts generated the best synergistic interaction as adjudged by checkerboard synergy assays. MICs of the individual extracts decreased 4-fold from 250 to 62.5 μg/mL, respectively. The SO + UG combination was further evaluated for its effects on bacterial growth inhibition, minimum bactericidal/inhibitory concentration (MBC/MIC) ratio, and time-kill kinetics. The results indicate that the SO + UG combination synergistically inhibited the bacterial growth of MRSA strains with bactericidal effects. SO + UG combination also exhibited more potent effects against clinical isolates. In multistep resistance selection experiments, both standard and isolates of MRSA showed no resistance to the SO + UG combination even after repeated exposure over fourteen passages. Our data suggest that using plant extract combinations could be a potential strategy to treat MRSA infections.
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Affiliation(s)
- Jae-Young Jeong
- Department of Health Sciences & Technology, Gachon Advanced Institute for Health Sciences & Technology, Gachon University, Incheon 21999, Republic of Korea
| | - In-Geun Jung
- Department of Biomedical Engineering, College of Health Science, Gachon University, Incheon 21936, Republic of Korea
| | - Seung-Hoon Yum
- Department of Biomedical Engineering, College of Health Science, Gachon University, Incheon 21936, Republic of Korea
| | - You-Jin Hwang
- Department of Health Sciences & Technology, Gachon Advanced Institute for Health Sciences & Technology, Gachon University, Incheon 21999, Republic of Korea
- Department of Biomedical Engineering, College of Health Science, Gachon University, Incheon 21936, Republic of Korea
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