3D‐printing antibacterial composite filaments containing synergistic antibacterial activity of green tea and tannic acid

Author(s):  
Boonlom Thavornyutikarn ◽  
Tareerat Lertwimol ◽  
Wasana Kosorn ◽  
Weerawan Hankamolsiri ◽  
Nutdanai Nampichai ◽  
...  
2015 ◽  
Vol 61 (7) ◽  
pp. 487-494 ◽  
Author(s):  
Devendra H. Dusane ◽  
Che O’May ◽  
Nathalie Tufenkji

Chromobacterium violaceum is an opportunistic pathogen that causes infections that are difficult to treat. The goal of this research was to evaluate the effect of selected tannins (tannic acid (TA) and gallic acid (GA)) on bacterial growth, motility, antibiotic (carbenicillin, tetracycline) susceptibility, and biofilm formation. Both tannins, particularly TA, impaired bacterial growth levels and swimming motilities at sub-minimum inhibitory concentrations (sub-MICs). In combination with tannins, antibiotics showed increased MICs, suggesting that tannins interfered with antibacterial activity. Sub-MICs of tetracycline or TA alone enhanced biofilm formation of C. violaceum; however, in combination, these compounds inhibited biofilm formation. In contrast, carbenicillin at sub-MICs was effective in inhibiting C. violaceum biofilm formation; however, in combination with lower concentrations of TA or GA, biofilms were enhanced. These results provide insights into the effects of tannins on C. violaceum growth and their varying interaction with antibiotics used to target C. violaceum infections.


2021 ◽  
Vol 31 (4) ◽  
pp. 498-500
Author(s):  
Jian Sun ◽  
Lili He ◽  
Yuanyu Gao ◽  
Lijuan Zhai ◽  
Jingwen Ji ◽  
...  

RSC Advances ◽  
2012 ◽  
Vol 2 (3) ◽  
pp. 930-940 ◽  
Author(s):  
Somnath Ghosh ◽  
V. S. Goudar ◽  
K. G. Padmalekha ◽  
S. V. Bhat ◽  
S. S. Indi ◽  
...  

2017 ◽  
Vol 4 (12) ◽  
pp. 2405-2417 ◽  
Author(s):  
Pritam Biswas ◽  
Rajdip Bandyopadhyaya

Schematic representation of E. coli cell death using the synergistic anti-bacterial activity of a mixture of Ag-AC and Cu-AC hybrids.


Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4572
Author(s):  
Beata Kaczmarek ◽  
Oliwia Miłek ◽  
Marta Michalska-Sionkowska ◽  
Lidia Zasada ◽  
Marta Twardowska ◽  
...  

Sodium alginate and tannic acid are natural compounds that can be mixed with each other. In this study, we propose novel eco-friendly hydrogels for biomedical applications. Thus, we conducted the following assessments including (i) observation of the structure of hydrogels by scanning electron microscope; (ii) bioerosion and the concentration of released tannic acid from subjected material; (iii) dehydrogenase activity assay to determine antibacterial activity of prepared hydrogels; and (iv) blood and cell compatibility. The results showed that hydrogels based on sodium alginate/tannic acid exert a porous structure. The immersion in simulated body fluid (SBF) results in the biomineralization process occurring on their surface while the bioerosion studies revealed that the addition of tannic acid improves hydrogels’ stability proportional to its concentration. Besides, tannic acid release concentration depends on the type of hydrogels and the highest amount was noticed for those based on sodium alginate with the content of 30% tannic acid. Antibacterial activity of hydrogels was proven for both Gram-negative and Gram-positive bacteria, the hemolysis rate was below 5% and the viability of the cells was elevated with an increasing amount of tannic acid in hydrogels. Collectively, we assume that obtained materials make the imperative to consider them for biomedical applications.


2019 ◽  
Vol 41 (12) ◽  
pp. 1433-1437 ◽  
Author(s):  
Gerson Nakazato ◽  
Marcelly Chue Gonçalves ◽  
Meiriele da Silva das Neves ◽  
Renata Katsuko Takayama Kobayashi ◽  
Marcelo Brocchi ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document