Evidence map›Paper›PMID 18428798›Full record

ArticleJournal of pharmaceutical sciences2009

Evaluation of the physical stability of the EC5 domain of E-cadherin: effects of pH, temperature, ionic strength, and disulfide bonds.

Kai Zheng, C Russell Middaugh, Teruna J Siahaan

Abstract readComparative Study
In one paragraph

Article in Journal of pharmaceutical sciences, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
–field-weighted citation impact
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

9 citing papers in PubMed.

  1. Article
  2. Review
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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

3 authors.

Kai ZhengDepartment of Pharmaceutical Chemistry, The University of Kansas, 2095 Constant Ave., Lawrence, Kansas 66047, USA.
C Russell Middaugh
Teruna J Siahaan

Funding

Modulation of the Intercellular Junction CadherinsR01EB000226 · NIBIB · UNIVERSITY OF KANSAS LAWRENCE · PI SIAHAAN, TERUNA J. · 2002 to 2004
$681k
NIBIB NIH HHS EB-00226NIBIB NIH HHS R01 EB000226
6 · The paper itself

Abstract

The development of protein drugs has been hampered by difficulties in formulating them due to their inherent chemical and physical stability, which could generate problems during the late stages of development. Thus, a basic understanding of the effect of structural features on the physicochemical stability of proteins can provide fundamental solutions to the formation of proteins. In this work, the physical stability of the EC5 protein under variable pH, temperature, and ionic strength and the role of the disulfide bond on the physical stability of EC5 were evaluated. All spectroscopic measurements were integrated in empirical phase diagrams, and these diagrams showed the stable and unstable regions of EC5. The native EC5 is more stable at high than at low ionic strength in a wide pH range during temperature elevation to 70 degrees C. The empirical phase diagrams also show that the reduced EC5 has lower stability than the parent EC5. The reduced EC5 has secondary structure only at pH 3 and 4 and is unfolded at other pH values. Finally, the reduced EC5 rapidly forms a precipitate at pH 4 and 5 upon heating. In conclusion, this study shows that ionic strength and the presence of the disulfide bonds are critical for the stability of EC5.

Indexed as

TemperatureCadherinsDisulfidesDrug Evaluation, PreclinicalDrug StabilityHydrogen BondingHydrogen-Ion ConcentrationOsmolar ConcentrationProtein Structure, TertiaryCadherinsDisulfides

Identifiers

PMID18428798
PMCPMC3311108

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Registered trials

None linked

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.