Abstract：
:Catechin is a plant polyphenol composed of epicatechin (EC), epigallocatechin (EGC), epicatechin gallate (ECG), and epigallocatechin gallate (EGCG) as diastereoisomers. Among the various classes of flavonoids, catechin was found to be the most powerful free radical scavenger, scavenging the reactive oxygen species (ROS) generated due to oxidative damage with antibacterial and anti-inflammatory activity. The toxicity of catechin towards bacteria was studied using gram-positive bacteria (B. subtilis) and gram-negative bacteria (E. coli) as model organisms and was found to be more toxic towards gram-positive bacteria. From the results, catechin was found to be beneficial as well as toxic (inhibitory) to the bacteria at a selective concentration behaving as double-edged swords with an IC50 value of 9 ppm for both the bacteria. The inhibitory mechanism of catechin was by oxidative damage through membrane permeabilization which was confirmed by the formation and treatment of bacterial liposomes. SEM images of the control and treated bacteria reveals membrane damage with morphological changes.
journal_name
Appl Microbiol Biotechnoljournal_title
Applied microbiology and biotechnologyauthors
Fathima A,Rao JRdoi
10.1007/s00253-016-7492-xsubject
Has Abstractpub_date
2016-07-01 00:00:00pages
6395-6402issue
14eissn
0175-7598issn
1432-0614pii
10.1007/s00253-016-7492-xjournal_volume
100pub_type
杂志文章abstract：:Photothermal cancer therapy, as a prospective approach for local cancer treatment, is attracting increasing interests. In this paper, gold nanorods were conjugated with folate (folate/AuNRs), and their photothermal effects on hepatocellular carcinoma cell line (HepG2) using MTT assay, flow cytometry, as well as on the...
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