Evidence map›Paper›PMID 19280349›Full record

ArticleAAPS PharmSciTech2009

Quercetin/beta-cyclodextrin solid complexes prepared in aqueous solution followed by spray-drying or by physical mixture.

Greice S Borghetti, Ivana S Lula, Ruben D Sinisterra, Valquiria L Bassani

Abstract read
In one paragraph

Article in AAPS PharmSciTech, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 1 pooled it
–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

16 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Article
  4. Spectroscopic Characterization UsingMolecules (Basel, Switzerland) · 2025
    Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Review
  10. Article
  11. Structural Investigation of Hesperetin-7-Molecules (Basel, Switzerland) · 2022
    Article
  12. Preparation, characterization, and antibacterial activity of plaunotol and plaunoi extracts complexed with hydroxypropyl-β-cyclodextrin.Saudi pharmaceutical journal : SPJ : the official publication of the Saudi Pharmaceutical Society · 2022
    Article
  13. Article
  14. Microencapsulation ofMolecules (Basel, Switzerland) · 2019
    Article
  15. Article
  16. Quercetin solid lipid microparticles: a flavonoid for inhalation lung delivery.European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences · 2013
    Article
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.

Greice S BorghettiUniversidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil.
Ivana S Lula
Ruben D Sinisterra
Valquiria L Bassani

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The present study was designed to investigate the influence of operating conditions (temperature, stirring time, and excess amount of quercetin) on the complexation of quercetin with beta-cyclodextrin using a 2(3) factorial design. The highest aqueous solubility of quercetin was reached under the conditions 37 degrees C/24 h/6 mM of quercetin. The stoichiometric ratio (1:1) and the apparent stability constant (Ks = 230 M(-1)) of the quercetin/beta-cyclodextrin complex were determined using phase-solubility diagrams. The semi-industrial production of a 1:1 quercetin/beta-cyclodextrin solid complex was carried out in aqueous solution followed by spray-drying. Although the yield of the spray-drying process was adequate (77%), the solid complex presented low concentration of quercetin (0.14%, w/w) and, thus, low complexation efficiency. The enhancement of aqueous solubility of quercetin using this method was limited to 4.6-fold in the presence of 15 mM of beta-cyclodextrin. Subsequently, an inclusion complex was prepared via physical mixture of quercetin with beta-cyclodextrin (molar ratio of 1:1 and quercetin concentration of 23% (w/w)) and characterized using infrared spectroscopy, differential scanning calorimetry, nuclear magnetic resonance spectroscopy, and scanning electron microscopy analyses. The enhancement of aqueous solubility of quercetin using this method was 2.2-fold, similar to that found in the complex prepared in aqueous solution before the spray-drying process (2.5-fold at a molar ratio of 1:1, i.e., 6 mM of quercetin and 6 mM of beta-cyclodextrin).

Indexed as

beta-CyclodextrinsCalorimetry, Differential ScanningDesiccationDrug StabilityKineticsMagnetic Resonance SpectroscopyMicroscopy, Electron, ScanningModels, ChemicalQuercetinSolubilitySpectrophotometry, InfraredSurface PropertiesTechnology, PharmaceuticalTemperaturebeta-CyclodextrinsQuercetin

Identifiers

PMID19280349
PMCPMC2663686

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.