Evidence map›Paper›PMID 24982192›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2014

Device design and materials optimization of conformal coating for islets of Langerhans.

Alice A Tomei, Vita Manzoli, Christopher A Fraker, Jaime Giraldo, Diana Velluto, Mejdi Najjar, Antonello Pileggi, R Damaris Molano, Camillo Ricordi, Cherie L Stabler and 1 more

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 88 papers.

0numbers the graph read from it
0cells of the map it votes in
88citing papers in PubMed
19.1field-weighted citation impact, top 1% 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

88 citing papers in PubMed, 188 citations in OpenAlex.

  1. Review
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  3. Article
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  5. Unlocking Transplant Tolerance with Biomaterials.Advanced healthcare materials · 2025
    Review
  6. Review
  7. Comprehensive biocompatibility profiling of human pancreas-derived biomaterial.Frontiers in bioengineering and biotechnology · 2025
    Article
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28 more citing papers are in PubMed but not listed here.

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

11 authors at 3 institutions in 3 countries.

Alice A TomeiDiabetes Research Institute, University of Miami Miller School of Medicine, Miami, FL 33136; atomei@med.miami.edu.ORCID http://orcid.org/0000-0002-5059-6303
Vita ManzoliDiabetes Research Institute, University of Miami Miller School of Medicine, Miami, FL 33136;Department of Electronics, Information and Bioengineering, Politecnico di Milano, 20133 Milan, Italy;
Christopher A FrakerDiabetes Research Institute, University of Miami Miller School of Medicine, Miami, FL 33136;
Jaime GiraldoDiabetes Research Institute, University of Miami Miller School of Medicine, Miami, FL 33136;Department of Biomedical Engineering, College of Engineering, University of Miami, Coral Gables, FL 33146 and.
Diana VellutoInstitute of Bioengineering, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
Mejdi NajjarDiabetes Research Institute, University of Miami Miller School of Medicine, Miami, FL 33136;
Antonello PileggiDiabetes Research Institute, University of Miami Miller School of Medicine, Miami, FL 33136;ORCID http://orcid.org/0000-0001-7819-2813
R Damaris MolanoDiabetes Research Institute, University of Miami Miller School of Medicine, Miami, FL 33136;
Camillo RicordiDiabetes Research Institute, University of Miami Miller School of Medicine, Miami, FL 33136;
Cherie L StablerDiabetes Research Institute, University of Miami Miller School of Medicine, Miami, FL 33136;Department of Biomedical Engineering, College of Engineering, University of Miami, Coral Gables, FL 33146 and.
Jeffrey A HubbellDiabetes Research Institute, University of Miami Miller School of Medicine, Miami, FL 33136;Institute of Bioengineering, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
University of Miami · USÉcole Polytechnique Fédérale de Lausanne · CHPolitecnico di Milano · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Encapsulation of islets of Langerhans may represent a way to transplant islets in the absence of immunosuppression. Traditional methods for encapsulation lead to diffusional limitations imposed by the size of the capsules (600-1,000 μm in diameter), which results in core hypoxia and delayed insulin secretion in response to glucose. Moreover, the large volume of encapsulated cells does not allow implantation in sites that might be more favorable to islet cell engraftment. To address these issues, we have developed an encapsulation method that allows conformal coating of islets through microfluidics and minimizes capsule size and graft volume. In this method, capsule thickness, rather than capsule diameter, is constant and tightly defined by the microdevice geometry and the rheological properties of the immiscible fluids used for encapsulation within the microfluidic system. We have optimized the method both computationally and experimentally, and found that conformal coating allows for complete encapsulation of islets with a thin (a few tens of micrometers) continuous layer of hydrogel. Both in vitro and in vivo in syngeneic murine models of islet transplantation, the function of conformally coated islets was not compromised by encapsulation and was comparable to that of unencapsulated islets. We have further demonstrated that the structural support conferred by the coating materials protected islets from the loss of function experienced by uncoated islets during ex vivo culture.

Indexed as

AlginatesAnimalsCell AggregationCoated Materials, BiocompatibleComputer SimulationEquipment DesignGlucuronic AcidHexuronic AcidsHydrodynamicsHydrogel, Polyethylene Glycol DimethacrylateIslets of LangerhansMiceMice, Inbred C57BLMicrofluidicsMicrospheresModels, BiologicalAlginatesCoated Materials, BiocompatibleGlucuronic AcidHexuronic AcidsHydrogel, Polyethylene Glycol DimethacrylatePolyethylene Glycolsalginatecell encapsulationcell transplantationpolyethylene glycol

Identifiers

PMID24982192
PMCPMC4115512
OpenAlexW2053624707

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.