Evidence map›Paper›PMID 27412259›Full record

ArticleJournal of nanobiotechnology2016

A novel covalent approach to bio-conjugate silver coated single walled carbon nanotubes with antimicrobial peptide.

Atul A Chaudhari, D'andrea Ashmore, Subrata Deb Nath, Kunal Kate, Vida Dennis, Shree R Singh, Don R Owen, Chris Palazzo, Robert D Arnold, Michael E Miller and 1 more

Open access · goldAbstract read
In one paragraph

Article in Journal of nanobiotechnology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
4.8field-weighted citation impact, top 5% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

21 citing papers in PubMed, 64 citations in OpenAlex.

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  11. Safe Nanoparticles: Are We There Yet?International journal of molecular sciences · 2020
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  15. Antifungal Peptides as Therapeutic Agents.Frontiers in cellular and infection microbiology · 2020
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors at 3 institutions in 1 country.

Atul A ChaudhariCenter for Nanobiotechnology Research, Alabama State University, Montgomery, AL, USA.
D'andrea AshmoreCenter for Nanobiotechnology Research, Alabama State University, Montgomery, AL, USA.
Subrata Deb NathDepartment of Mechanical Engineering, University of Louisville, Louisville, KY, USA.
Kunal KateDepartment of Mechanical Engineering, University of Louisville, Louisville, KY, USA.
Vida DennisCenter for Nanobiotechnology Research, Alabama State University, Montgomery, AL, USA.
Shree R SinghCenter for Nanobiotechnology Research, Alabama State University, Montgomery, AL, USA.
Don R OwenTherapeutic Peptides Inc., 7053 Revenue Drive, Baton Rouge, LA, 70809, USA.
Chris PalazzoTherapeutic Peptides Inc., 7053 Revenue Drive, Baton Rouge, LA, 70809, USA.
Robert D ArnoldDepartment of Drug Discovery and Development, Auburn University, Auburn, AL, USA.
Michael E MillerResearch Instrumentation Facility, Auburn University, Auburn, AL, USA.
Shreekumar R PillaiCenter for Nanobiotechnology Research, Alabama State University, Montgomery, AL, USA. spillai@alasu.edu.
Alabama State University · USAuburn University · USUniversity of Louisville · US

Funding

RISE Option II:NIGMS-Research Initiative for Scientific Enhancement (RISE) Program at ASUR25GM106995 · NIGMS · ALABAMA STATE UNIVERSITY · PI DENNIS, VIDA A · 2013 to 2023
$3.0M
NIGMS NIH HHS R25 GM106995
6 · The paper itself

Abstract

backgroundDue to increasing antibiotic resistance, the use of silver coated single walled carbon nanotubes (SWCNTs-Ag) and antimicrobial peptides (APs) is becoming popular due to their antimicrobial properties against a wide range of pathogens. However, stability against various conditions and toxicity in human cells are some of the major drawbacks of APs and SWCNTs-Ag, respectively. Therefore, we hypothesized that APs-functionalized SWCNTs-Ag could act synergistically. Various covalent functionalization protocols described previously involve harsh treatment of carbon nanotubes for carboxylation (first step in covalent functionalization) and the non-covalently functionalized SWCNTs are not satisfactory.

methodsThe present study is the first report wherein SWCNTs-Ag were first carboxylated using Tri sodium citrate (TSC) at 37 °C and then subsequently functionalized covalently with an effective antimicrobial peptide from Therapeutic Inc., TP359 (FSWCNTs-Ag). SWCNTs-Ag were also non covalently functionalized with TP359 by simple mixing (SWCNTs-Ag-M) and both, the FSWCNTs-Ag (covalent) and SWCNTs-Ag-M (non-covalent), were characterized by Fourier transform infrared spectroscopy (FT-IR), Ultraviolet visualization (UV-VIS) and transmission electron microscopy (TEM). Further the antibacterial activity of both and TP359 were investigated against two gram positive (Staphylococcus aureus and Streptococcus pyogenes) and two gram negative (Salmonella enterica serovar Typhimurium and Escherichia coli) pathogens and the cellular toxicity of TP359 and FSWCNTs-Ag was compared with plain SWCNTs-Ag using murine macrophages and lung carcinoma cells.

resultsFT-IR analysis revealed that treatment with TSC successfully resulted in carboxylation of SWCNTs-Ag and the peptide was indeed attached to the SWCNTs-Ag evidenced by TEM images. More importantly, the present study results further showed that the minimum inhibitory concentration (MIC) of FSWCNTs-Ag were much lower (~7.8-3.9 µg/ml with IC50: ~4-5 µg/ml) compared to SWCNTs-Ag-M and plain SWCNTs-Ag (both 62.6 µg/ml, IC50: ~31-35 µg/ml), suggesting that the covalent conjugation of TP359 with SWCNTs-Ag was very effective on their counterparts. Additionally, FSWCNTs-Ag are non-toxic to the eukaryotic cells at their MIC concentrations (5-2.5 µg/ml) compared to SWCNTs-Ag (62.5 µg/ml).

conclusionIn conclusion, we demonstrated that covalent functionalization of SWCNTs-Ag and TP359 exhibited an additive antibacterial activity. This study described a novel approach to prepare SWCNT-Ag bio-conjugates without loss of antimicrobial activity and reduced toxicity, and this strategy will aid in the development of novel and biologically important nanomaterials.

Indexed as

AnimalsAnti-Bacterial AgentsAntimicrobial Cationic PeptidesCell LineCell Line, TumorCitratesEpithelial CellsEscherichia coliHumansMacrophagesMiceMicrobial Sensitivity TestsNanotubes, CarbonSalmonella typhimuriumSilverStaphylococcus aureusAnti-Bacterial AgentsAntimicrobial Cationic PeptidesCitratesNanotubes, CarbonSilvertrisodium citrateAntimicrobialBacteriaBio-conjugationCarbon nanotubesCytotoxicityPeptide

Identifiers

PMID27412259
PMCPMC4944237
OpenAlexW2465170970

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.