Evidence map›Paper›PMID 24842851›Full record

ArticlePloS one2014

Evaluation of a prednisolone acetate-loaded subconjunctival implant for the treatment of recurrent uveitis in a rabbit model.

Marcus Ang, Xuwen Ng, Cheewai Wong, Peng Yan, Soon-Phaik Chee, Subbu S Venkatraman, Tina T Wong

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
2.3field-weighted citation impact, top 13% 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

6 citing papers in PubMed, 21 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Noninvasive Ocular Drug Delivery System of Dexamethasone Sodium Phosphate in the Treatment of Experimental Uveitis Rabbit.Journal of ocular pharmacology and therapeutics : the official journal of the Association for Ocular Pharmacology and Therapeutics · 2017
    Article
  5. Article
  6. 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

7 authors at 3 institutions in 1 country.

Marcus AngSingapore National Eye Centre, Singapore, Singapore; Singapore Eye Research Institute, Singapore, Singapore.
Xuwen NgMaterials Science and Engineering, Nanyang Technological University, Singapore, Singapore.
Cheewai WongSingapore National Eye Centre, Singapore, Singapore; Singapore Eye Research Institute, Singapore, Singapore.
Peng YanMaterials Science and Engineering, Nanyang Technological University, Singapore, Singapore.
Soon-Phaik CheeSingapore National Eye Centre, Singapore, Singapore; Singapore Eye Research Institute, Singapore, Singapore.
Subbu S VenkatramanMaterials Science and Engineering, Nanyang Technological University, Singapore, Singapore.
Tina T WongSingapore National Eye Centre, Singapore, Singapore; Singapore Eye Research Institute, Singapore, Singapore; Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore.
Nanyang Technological University · SGSingapore National Eye Center · SGSingapore Eye Research Institute · SG

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimTo assess the efficacy of a biodegradable, prednisolone acetate implant in a rabbit uveitis model.

methodsRandomized, controlled study of biodegradable microfilms preloaded with prednisolone acetate (PA) in a rabbit uveitis model. Experimental uveitis was induced by unilateral intravitreal injection of Mycobacterium tuberculosis H37Ra antigen (50 ug; 1 ug/uL) in preimmunized rabbits. PA-loaded poly[d,l-lactide-co-ε-caprolactone] (PLC) microfilms (n = 10) and blank microfilms (n = 6) were implanted subconjunctivally. An estimate of PA release in vivo was calculated from measured residual PA amounts in microfilms after the rabbits were sacrificed. The eyes were clinically monitored for ocular inflammation for 28 days. Histopathological examination of the enucleated eyes was performed at the end of the study period.

resultsIn vitro studies revealed that sandwich PA-loaded microfilm formulations exhibited higher release kinetic compared to homogenous PA-loaded microfilms. The 60-40-60% microfilm released an average of 0.034 mg/day of PA over the period of 60 days in vitro; and we found that approximately 0.12 mg/day PA was released in vivo. Animals implanted with the PA-loaded microfilms exhibited significantly lowered median inflammatory scores when compared against the control group in this model for recurrent uveitis (P<0.001). The implants were clinically well tolerated by all the animals. Histology results showed no significant scarring or inflammation around the PA-loaded microfilms.

conclusionOur pilot study demonstrated that a subconjunctival PA-loaded implant is effective in suppressing inflammation in the rabbit model of uveitis, by providing therapeutic levels of PA that attenuated the inflammatory response even after a rechallenge. Longer term studies are now needed to establish the therapeutic potential of such a delivery system for treatment of ocular inflammation.

Indexed as

AnimalsConjunctivaDrug Administration RoutesInflammationMalePrednisoloneProstheses and ImplantsRabbitsUveitisPrednisoloneprednisolone acetate

Identifiers

PMID24842851
PMCPMC4026472
OpenAlexW2162053990

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.