Evidence map›Paper›PMID 38134346›Full record

ArticleAdvanced healthcare materials2024

Embedded 3D Bioprinting of Collagen Inks into Microgel Baths to Control Hydrogel Microstructure and Cell Spreading.

Lucia G Brunel, Fotis Christakopoulos, David Kilian, Betty Cai, Sarah M Hull, David Myung, Sarah C Heilshorn

Open access · greenAbstract read
In one paragraph

Article in Advanced healthcare materials, 2024. 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
4.1field-weighted citation impact, top 5% 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, 37 citations in OpenAlex.

  1. Review
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  9. Omnidirectional 3D Printing of Anisotropic Nanofibrous Peptide Hydrogels.bioRxiv : the preprint server for biology · 2025
    Article
  10. Article
  11. Organoid bioprinting to pattern the matrix microenvironment.Current opinion in biomedical engineering · 2025
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  13. 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

7 authors at 2 institutions in 1 country.

Lucia G BrunelDepartment of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA.ORCID 0000-0003-0327-5635
Fotis ChristakopoulosDepartment of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA.ORCID 0000-0001-7383-5875
David KilianDepartment of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA.ORCID 0000-0003-3151-3637
Betty CaiDepartment of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA.ORCID 0000-0002-2160-4167
Sarah M HullDepartment of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA.ORCID 0000-0002-3741-654X
David MyungDepartment of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA.
Sarah C HeilshornDepartment of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA.ORCID 0000-0002-9801-6304
Stanford University · USVA Palo Alto Health Care System · US

Funding

Stanford Vision Research CoreP30EY026877 · NEI · STANFORD UNIVERSITY · PI TIRIN MOORE · 2017 to 2026
$8.0M
Corneal Scar Repair through SPAACKL: Sutureless, Pro-regenerative Anterior Additive Collagen gel KeratopLastyR01EY033363 · NEI · STANFORD UNIVERSITY · PI David Myung · 2022 to 2026
$2.5M
Engineered matrix microarrays to enhance the regenerative potential of iPSC-derived endothelial cellsR01HL142718 · NHLBI · STANFORD UNIVERSITY · PI HEILSHORN, SARAH C, HUANG, NGAN F. · 2018 to 2021
$1.6M
Characterization of corneal stromal stem cells encapsulated within bioorthogonally crosslinked collagen gels for delivery to the ocular surfaceF31EY030731 · NEI · STANFORD UNIVERSITY · PI HULL, SARAH · 2019 to 2022
$131k
3D bioprinting of regenerative, corneal cell-laden inks to treat corneal blindnessF31EY034785 · NEI · STANFORD UNIVERSITY · PI BRUNEL, LUCIA · 2023 to 2024
$82k
National Science Foundation DGE-165618National Science Foundation DMR-2103812NEI NIH HHS F31 EY030731NEI NIH HHS F31 EY034785NEI NIH HHS P30 EY026877NEI NIH HHS R01 EY033363NHLBI NIH HHS R01 HL142718NIH HHS F31-EY030731NIH HHS F31-EY034785NIH HHS P30-EY026877NIH HHS R01-EY033363Research to Prevent BlindnessStanford Bio-X Interdisciplinary Graduate FellowshipStanford Knight-Hennessy Scholars ProgramSwiss National Science Foundation P500PN210723
6 · The paper itself

Abstract

Microextrusion-based 3D bioprinting into support baths has emerged as a promising technique to pattern soft biomaterials into complex, macroscopic structures. It is hypothesized that interactions between inks and support baths, which are often composed of granular microgels, can be modulated to control the microscopic structure within these macroscopic-printed constructs. Using printed collagen bioinks crosslinked either through physical self-assembly or bioorthogonal covalent chemistry, it is demonstrated that microscopic porosity is introduced into collagen inks printed into microgel support baths but not bulk gel support baths. The overall porosity is governed by the ratio between the ink's shear viscosity and the microgel support bath's zero-shear viscosity. By adjusting the flow rate during extrusion, the ink's shear viscosity is modulated, thus controlling the extent of microscopic porosity independent of the ink composition. For covalently crosslinked collagen, printing into support baths comprised of gelatin microgels (15-50 µm) results in large pores (≈40 µm) that allow human corneal mesenchymal stromal cells (MSCs) to readily spread, while control samples of cast collagen or collagen printed in non-granular support baths do not allow cell spreading. Taken together, these data demonstrate a new method to impart controlled microscale porosity into 3D printed hydrogels using granular microgel support baths.

Indexed as

BioprintingCollagenHydrogelsInkMesenchymal Stem CellsPrinting, Three-DimensionalAnimalsHumansMicrogelsPorosityViscosityCollagenHydrogelsMicrogelscollagen inksembedded bioprintinghydrogel microstructuresupport baths

Identifiers

PMID38134346
PMCPMC11192865
OpenAlexW4390097128

What OpenQuestion holds

Textmetadata
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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.