Researchers 3D Print Tissue That Mimics Human Bile Duct

Share this Article

[Image via Cancer.org]

A bile duct plays a crucial role in the body, carrying bile from the liver to the intestine to facilitate digestion. Cancer of the bile duct has an alarmingly low survival rate, and treatment requires that the disease be caught early enough for the affected part of the bile duct to be removed. But there’s some good news for those suffering from conditions of the bile duct, as researchers at Northwestern University have 3D printed a mini-tissue that mimics it.

The research is documented in a study entitled “Tailoring nanostructure and bioactivity of 3D-printable hydrogels with self-assemble peptides amphiphile (PA) for promoting bile duct formation,” which you can access here. Lead author Ming Yan and colleagues 3D printed a nanostructure consisting of peptides amphiphile, or PAs, bioink and bile duct cells, or cholangiocytes.

“3D-printing has expanded our ability to produce reproducible and more complex scaffold architectures for tissue engineering applications,” the abstract states. “In order to enhance the biological response within these 3D-printed scaffolds incorporating nanostructural features and/or specific biological signaling may be an effective means to optimize tissue regeneration. Peptides amphiphiles (PAs) are a versatile supramolecular biomaterial with tailorable nanostructural and biochemical features. PAs are widely used in tissue engineering applications such as angiogenesis, neurogenesis, and bone regeneration. Thus, the addition of PAs is a potential solution that can greatly expand the utility of 3D bioprinting hydrogels in the field of regenerative medicine.”

The PAs and cholangiocytes were mixed with thiolated gelatin at 37°C and 3D printed at 4ºC using an EnvisionTEC 3D-Bioplotter, one of the most-utilized bioprinters on the market. The material retained integrity as the bioinks printed into filaments capable of supporting multi-layered scaffolds. The researchers stabilized the scaffold by cross-linking a derivative of ethylene glycol with calcium ions; scaffold stability was observed in culture for more than a month at a temperature of 37°C.

First author Ming Yan. [Image: Northwestern via Physics World]

The researchers also explored the use of a laminin-derived peptide (Ile-Lys-Val-Ala-Val, IKVAV) and the influence its inclusion in the bioink would have on the bile duct cells. Laminin is a molecule necessary for cell adhesion, and after bioprinting, the bile duct cells remained viable in vitro. Staining revealed the formation of functional bile-cell-based tube structures; when cultured in IKVAV bioink, the structures showed enhanced morphology, forming functional tubular structures.

This is the first time that a bioink-based system supplemented with PAs was used for bile duct tissue engineering. The research shows a lot of promise; the bioprinted bile ducts as well as in vitro systems created with the bioinks have the potential to be valuable for research into bile duct cancer as well as the testing of treatments. Right now, bile duct cancer is a grave diagnosis to receive, but the enhanced research that could be made possible by this work offers hope for better understanding and more effective treatments.

As a next step, the researchers now want to optimize the peptide concentration and test other signaling molecules within the bioinks to enhance the formation of functional tubular structures that mimic those found in the liver.

Additional authors of the research paper include P.L. Lewis and R.N. Shah.

[Source: Physics World]

 

Facebook Comments

Share this Article


Recent News

3DPOD Episode 11: Interview with Xometry’s Greg Paulsen: 3D Printing Applications and Processes

Fortify Closes $10M Series A Funding Led by Accel



Categories

3D Design

3D Printed Art

3D Printed Food

3D Printed Guns


You May Also Like

EOS Explains the State of Industrial 3D Printing in Latin America

Back in 1989, Hans Langer’s vision of going straight from CAD to manufacturing without tooling for the fabrication of physical components led to the creation of Electro Optical Systems (EOS...

Thixotropy, Nanoclay and the Optimal Parameters of 3D Printed Concrete

In ‘The Effect of Material Fresh Properties and Process Parameters on Buildability and Interlayer Adhesion of 3D Printed Concrete,’ international authors strive to understand more about materials and parameters in...

3D Printed Stainless Steel Microreactor

International researchers are exploring the creation of microreactors in ‘Simple 3D printed stainless steel microreactors for online mass spectrometric analysis.’ In this study, they analyze the functionality of a stainless...

Singapore: Effects of Porosity on Mechanical Properties in FDM 3D Printing

Authors Xue Wang, Liping Zhao, Jerry Ying His Fuh, and Heow Pueh Lee lead a complex discussion about porosity in 3D printing in their recently published article, ‘Effect of Porosity...


Shop

View our broad assortment of in house and third party products.


Print Services

Subscribe To Our Newsletter

Subscribe To Our Newsletter

Join our mailing list to receive the latest news and updates from our 3DPrint.com.

You have Successfully Subscribed!