Evidence map›Paper›PMID 25914532›Full record

ArticleInternational journal of nanomedicine2015

Thermal properties and physicochemical behavior in aqueous solution of pyrene-labeled poly(ethylene glycol)-polylactide conjugate.

Wei-Lin Chen, Yun-Fen Peng, Sheng-Kuo Chiang, Ming-Hsi Huang

Abstract read
In one paragraph

Article in International journal of nanomedicine, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

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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

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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

2 citing papers in PubMed.

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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

4 authors.

Wei-Lin ChenNational Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Miaoli, Taiwan ; Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan.
Yun-Fen PengNational Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Miaoli, Taiwan ; PhD Program in Tissue Engineering and Regenerative Medicine, National Chung Hsing University, Taichung, Taiwan.
Sheng-Kuo ChiangNational Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Miaoli, Taiwan.
Ming-Hsi HuangNational Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Miaoli, Taiwan ; Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan ; PhD Program in Tissue Engineering and Regenerative Medicine, National Chung Hsing University, Taichung, Taiwan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

A fluorescence-labeled bioresorbable polymer was prepared by a coupling reaction of poly(ethylene glycol)-polylactide (PEG-PLA) with carboxyl pyrene, using N,N'-diisopropylcarbodiimide/1-hydroxy-7-azabenzotriazole (DIC/HOAt) as a coupling agent and 4-dimethylaminopyridine (DMAP) as a catalyst. The obtained copolymer, termed PEG-PLA-pyrene, was characterized using various analytical techniques, such as gel permeation chromatography (GPC), matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS), proton nuclear magnetic resonance ((1)H-NMR), infrared spectroscopy (IR), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA), to identify the molecular structure and to monitor the thermal property changes before and after the reaction. The presence of a pyrene moiety at the end of polylactide (PLA) did not alter the crystallization ability of the poly(ethylene glycol) (PEG) blocks, indicating that the conjugate preserved the inherent thermal properties of PEG-PLA. However, the presence of PEG-PLA blocks strongly reduced the melting of pyrene, indicating that the thermal characteristics were sensitive to PEG-PLA incorporation. Regarding the physicochemical behavior in aqueous solution, a higher concentration of PEG-PLA-pyrene resulted in a higher ultraviolet-visible (UV-vis) absorbance and fluorescence emission intensity. This is of great interest for the use of this conjugate as a fluorescence probe to study the in vivo distribution as well as the internalization and intracellular localization of polymeric micelles.

Indexed as

Chemical PhenomenaCalorimetry, Differential ScanningChromatography, GelMagnetic Resonance SpectroscopyMicellesMolecular StructurePolyestersPolyethylene GlycolsPolymersPyrenesTemperatureWaterMicellesPolyesterspoly(ethyleneglycol-lactide)Polyethylene GlycolsPolymerspyrenePyrenesWaterbioresorbable polymerfluorescence probePEG-PLApoly (ethylene glycol)-polylactidepolymeric micellespyrene

Identifiers

PMID25914532
PMCPMC4399596

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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.