Evidence map›Paper›PMID 30873444›Full record

ArticleJournal of clinical and translational research2015

Layer-by-layer heparinization of decellularized liver matrices to reduce thrombogenicity of tissue engineered grafts.

Bote G Bruinsma, Yeonhee Kim, Tim A Berendsen, Sinan Ozer, Martin L Yarmush, Basak E Uygun

Open access · hybridAbstract read
In one paragraph

Article in Journal of clinical and translational research, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
5.3field-weighted citation impact, top 4% 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

22 citing papers in PubMed, 39 citations in OpenAlex.

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  8. Review
  9. Recent Advances in Liver Engineering With Decellularized Scaffold.Frontiers in bioengineering and biotechnology · 2022
    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

6 authors at 2 institutions in 2 countries.

Bote G BruinsmaCenter for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, and the Shriners Hospitals for Children, Boston, Massachusetts, United States.
Yeonhee KimCenter for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, and the Shriners Hospitals for Children, Boston, Massachusetts, United States.
Tim A BerendsenCenter for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, and the Shriners Hospitals for Children, Boston, Massachusetts, United States.
Sinan OzerCenter for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, and the Shriners Hospitals for Children, Boston, Massachusetts, United States.
Martin L YarmushCenter for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, and the Shriners Hospitals for Children, Boston, Massachusetts, United States.
Basak E UygunCenter for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, and the Shriners Hospitals for Children, Boston, Massachusetts, United States.
Academic Medical Center · NLRutgers, The State University of New Jersey · US

Funding

Recellularization of Liver BioscaffoldsR01DK084053 · NIDDK · MASSACHUSETTS GENERAL HOSPITAL · PI UYGUN, BASAK ELIF, YARMUSH, MARTIN L · 2009 to 2020
$4.6M
Use of Discarded Organs for Preparation of Liver GraftsR00DK088962 · NIDDK · MASSACHUSETTS GENERAL HOSPITAL · PI UYGUN, BASAK ELIF · 2014 to 2016
$844k
NIDDK NIH HHS R00 DK088962NIDDK NIH HHS R01 DK084053
6 · The paper itself

Abstract

backgroundTissue-engineered liver grafts may offer a viable alternative to orthotopic liver transplantation and help overcome the donor organ shortage. Decellularized liver matrices (DLM) have a preserved vasculature and sustain hepatocellular function in culture, but graft survival after transplantation remains limited due to thrombogenicity of the matrix.

aimTo evaluate the effect of heparin immobilization on DLM thrombogenicity.

methodsHeparin was immobilized on DLMs by means of layer-by-layer deposition. Grafts with 4 or 8 bilayers and 2 or 4 g/L of heparin were recellularized with primary rat hepatocytes and maintained in culture for 5 days. Hemocompatibility of the graft was assessed by ex vivo diluted whole-blood perfusion and heterotopic transplantation.

resultsHeparin was deposited throughout the matrix and the heparin content in the graft was higher with increasing number of bilayers and concentration of heparin. Recellularization and in vitro albumin and urea production were unaffected by heparinization. Resistance to blood flow during ex vivo perfusion was lower with increased heparinization and, macroscopically, no clots were visible in grafts with 8 bilayers. Following transplantation, flow through the graft was limited in all groups. Histological evidence of thrombosis was lower in heparinized DLMs, but transplantation of DLM grafts was not improved.

conclusionsLayer-by-layer deposition of heparin on a DLM is an effective method of immobilizing heparin throughout the graft and does not impede recellularization or hepatocellular function in vitro. Thrombogenicity during ex vivo blood perfusion was reduced in heparinized grafts and optimal with 8 bilayers, but transplantation remained unsuccessful with this method. RELEVANCE FOR PATIENTS: Tissue engineered liver grafts may offer a viable solution to dramatic shortages in donor organs.

Indexed as

decellularizationhemocompatibilityheparinizationrecellularizationthrombogenicityTissue engineeringtransplantation

Identifiers

PMID30873444
PMCPMC4607069
OpenAlexW2110353731

What OpenQuestion holds

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Registered trials

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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.