Evidence map›Paper›PMID 33732817›Full record

ArticleRegenerative therapy2021

Bile duct reconstruction using scaffold-free tubular constructs created by Bio-3D printer.

Takashi Hamada, Anna Nakamura, Akihiko Soyama, Yusuke Sakai, Takayuki Miyoshi, Shun Yamaguchi, Masaaki Hidaka, Takanobu Hara, Tota Kugiyama, Mitsuhisa Takatsuki and 3 more

Open access · goldAbstract read
In one paragraph

Article in Regenerative therapy, 2021. 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
1.5field-weighted citation impact, top 19% 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, 12 citations in OpenAlex.

  1. Review
  2. Bioengineered Bile Duct for Liver Regenerative Medicine and Bile Duct Reconstruction.JGH open : an open access journal of gastroenterology and hepatology · 2025
    Review
  3. 3D bioprinting for bile duct tissue engineering: current status and prospects.Frontiers in bioengineering and biotechnology · 2025
    Review
  4. Review
  5. Article
  6. Bioink Formulation and Machine Learning-Empowered Bioprinting Optimization.Frontiers in bioengineering and biotechnology · 2022
    Review
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

13 authors at 4 institutions in 1 country.

Takashi HamadaDepartment of Surgery, Nagasaki University Graduate School of Biomedical Sciences, Japan.
Anna NakamuraDepartment of Regenerative Medicine and Biomedical Engineering, Faculty of Medicine, Saga University, Japan.
Akihiko SoyamaDepartment of Surgery, Nagasaki University Graduate School of Biomedical Sciences, Japan.
Yusuke SakaiDepartment of Surgery, Nagasaki University Graduate School of Biomedical Sciences, Japan.
Takayuki MiyoshiDepartment of Surgery, Nagasaki University Graduate School of Biomedical Sciences, Japan.
Shun YamaguchiDepartment of Surgery, Nagasaki University Graduate School of Biomedical Sciences, Japan.
Masaaki HidakaDepartment of Surgery, Nagasaki University Graduate School of Biomedical Sciences, Japan.
Takanobu HaraDepartment of Surgery, Nagasaki University Graduate School of Biomedical Sciences, Japan.
Tota KugiyamaDepartment of Surgery, Nagasaki University Graduate School of Biomedical Sciences, Japan.
Mitsuhisa TakatsukiDepartment of Surgery, Nagasaki University Graduate School of Biomedical Sciences, Japan.
Akihide KamiyaDepartment of Molecular Life Sciences, Tokai University School of Medicine, Japan.
Koichi NakayamaDepartment of Regenerative Medicine and Biomedical Engineering, Faculty of Medicine, Saga University, Japan.
Susumu EguchiDepartment of Surgery, Nagasaki University Graduate School of Biomedical Sciences, Japan.
Nagasaki University · JPSaga University · JPKyushu University · JPTokai University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionBiliary strictures after bile duct injury or duct-to-duct biliary reconstruction are serious complications that markedly reduce patients' quality of life because their treatment involves periodic stent replacements. This study aimed to create a scaffold-free tubular construct as an interposition graft to treat biliary complications.

methodsScaffold-free tubular constructs of allogeneic pig fibroblasts, that is, fibroblast tubes, were created using a Bio-3D Printer and implanted into pigs as interposition grafts for duct-to-duct biliary reconstruction.

resultsAlthough the fibroblast tube was weaker than the native bile duct, it was sufficiently strong to enable suturing. The pigs' serum hepatobiliary enzyme levels remained stable during the experimental period. Micro-computed tomography showed no biliary strictures, no biliary leakages, and no intrahepatic bile duct dilations. The tubular structure was retained in all resected specimens, and the fibroblasts persisted at the graft sites. Immunohistochemical analyses revealed angiogenesis in the fibroblast tube and absence of extensions of the biliary epithelium into the fibroblast tube's lumen.

conclusionsThis study's findings demonstrated successful reconstruction of the extrahepatic bile duct with a scaffold-free tubular construct created from pig fibroblasts using a novel Bio-3D Printer. This construct could provide a novel regenerative treatment for patients with hepatobiliary diseases.

Indexed as

ALP, alkaline phosphataseALT, alanine aminotransferaseArtificial bile ductAST, aspartate aminotransferaseBio-3D printerCr, creatinineDMEM, Dulbecco's Modified Eagle's MediumEDTA, trypsin-ethylenediaminetetraacetic acidFBS, fetal bovine serumIBDI, iatrogenic bile duct injuryKCL, potassium chlorideLDLT, living donor liver transplantationPBS, phosphate-buffered salineQOL, quality of lifeReconstructionScaffold-free tubular constructT-Bil, total bilirubinγ-GTP, γ-glutamyl transpeptidase

Identifiers

PMID33732817
PMCPMC7921183
OpenAlexW3131315534

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.