Evidence map›Paper›PMID 19921405›Full record

ArticlePharmaceutical research2010

Using polymer chemistry to modulate the delivery of neurotrophic factors from degradable microspheres: delivery of BDNF.

James P Bertram, Millicent F Rauch, Kaliq Chang, Erin B Lavik

Abstract read
PubMed Publisher
In one paragraph

Article in Pharmaceutical research, 2010. 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
1.1field-weighted citation impact, top 28% 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, 51 citations in OpenAlex.

  1. Article
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  15. Review
  16. Agile delivery of protein therapeutics to CNS.Journal of controlled release : official journal of the Controlled Release Society · 2014
    Review
  17. Neurotrophin strategies for neuroprotection: are they sufficient?Journal of neuroimmune pharmacology : the official journal of the Society on NeuroImmune Pharmacology · 2014
    Review
  18. Approaches for neural tissue regeneration.Stem cell reviews and reports · 2014
    Review
  19. Review
  20. Prospects of pharmaceuticals and biopharmaceuticals loaded microparticles prepared by double emulsion technique for controlled delivery.Saudi pharmaceutical journal : SPJ : the official publication of the Saudi Pharmaceutical Society · 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 at 3 institutions in 1 country.

James P BertramDepartment of Biomedical Engineering, Yale University, 55 Prospect Street, Malone Engineering Center, New Haven, Connecticut 06520, USA.
Millicent F Rauch
Kaliq Chang
Erin B Lavik
Yale University · USCase Western Reserve University · USColumbia University Irving Medical Center · US

Funding

Pre-doctoral Training Program in Neuroengineering(RMI)T90DK070068 · NIDDK · YALE UNIVERSITY · PI SALTZMAN, W. MARK · 2004 to 2008
$2.0M
NIDDK NIH HHS T90 DK070068
6 · The paper itself

Abstract

purposeBrain-derived neurotrophic factor (BDNF) plays an important role in neuroprotection and repair, but long-term delivery from polymer systems has been challenging. We investigated the role the chemistry of the polymer played in loading and delivery of BDNF via microspheres, which are suitable for minimally invasive administration.

methodsWe synthesized polymers based on PLGA and PEG to determine what components augmented loading and delivery. We characterized microspheres fabricated from these polymers using a battery of tests, including sizing, in vitro release, and bioactivity of the BDNF using PC12 cells engineered to express the trkB receptor.

resultsWe found that a triblock polymer of PLGA, PLL, and PEG led to the delivery of BDNF for periods of time greater than 60 days and that the BDNF delivered was bioactive. The microsphere size was amendable to injection via a 30 gauge needle, allowing minimally invasive delivery.

conclusionsPLGA-PLL-PEG leads to greater loading and longer-term delivery of BDNF than PLGA or a blend of the polymers. We hypothesize that the introduction of an amphiphilic PLGA-based polymer increases the interaction of the BDNF with the polymer and leads to release that more closely correlates with the degradation of the polymer.

Indexed as

Brain-Derived Neurotrophic FactorMicrospheresAnimalsCell DifferentiationChemistry, PharmaceuticalDrug CarriersLactic AcidModels, ChemicalParticle SizePC12 CellsPolyethylene GlycolsPolyglycolic AcidPolylactic Acid-Polyglycolic Acid CopolymerPolylysinePolymersRatsBrain-Derived Neurotrophic FactorDrug CarriersLactic AcidPolyethylene GlycolsPolyglycolic AcidPolylactic Acid-Polyglycolic Acid CopolymerPolylysinePolymersReceptor, trkB

Identifiers

PMID19921405
OpenAlexW1990491462

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.