Overview of Bioink in 3D Bioprinting

The objective of 3D bioprinting is to fabricate living volumetric constructs through the sequential deposition of materials harboring living cells, known as bioinks. This bioink is not only central but also the distinctive feature that demarcates "bioprinting" from "3D printing." The efficacy in generating functional tissues is profoundly influenced by the quality of the bioink. The biomaterial ink's composition and the mechanisms of network crosslinking are pivotal in determining the mechanical, physicochemical, and biological properties of the resultant 3D constructs. Natural-origin carbohydrates, such as alginate, gelatin, and hyaluronic acid, have been extensively utilized in 3D bioprinting due to their versatility, biodegradability, biocompatibility, lack of immunogenicity, and, in certain instances, their structural resemblance to the decellularized extracellular matrix (ECM) of native tissues.

Engineering GlycoNano™ Precision: Where Carbohydrate Base Material Meets Bioprinting Excellence

CD BioGlyco is at the forefront of this innovative field and leverages the unique properties of natural-origin carbohydrates to create a bioink that not only meets but exceeds the stringent requirements of 3D bioprinting. Based on the advanced GlycoNano™ Platform, we provide a comprehensive solution that offers a diverse range of bioinks derived from various natural-origin carbohydrates. Each bioink is meticulously designed to cater to specific needs in 3D bioprinting, ensuring optimal performance in terms of printability, mechanical properties, and biological functionality.

The production of carbohydrate base material bioink involves several critical steps, from the synthesis of the carbohydrate base material to the formulation of the bioink and its characterization.

Preparation of Carbohydrate Base Material

We prepare the carbohydrate base material, which serves as the foundational component of the bioink, by dissolving it in a suitable aqueous solution. This solution is stirred overnight at room temperature to ensure complete dissolution. Other bioink components, such as crosslinking agents, stabilizers, and additional structural components, are prepared in their respective forms, either as powders or solutions.

In Vitro Cell Culture

We culture specific cell lines in a medium conducive to cell growth, supplemented with necessary nutrients. The cells are then harvested using enzymatic digestion and centrifugation to obtain a concentrated cell pellet. The cell pellet is resuspended in a serum-free medium and subsequently mixed with other bioink excipients to formulate the bioink.

Formulation of Bioink

The bioink formulation is prepared in separate vials under sterile conditions. Each vial contains different components of the bioink, including the dissolved carbohydrate base material, crosslinking agents, and a mixture of cells and structural components. We mix the carbohydrate base material and crosslinking agents to create a neutral solution, which is then subjected to centrifugation to remove air bubbles. This neutral solution is then combined with the remaining components and homogeneously mixed to obtain the final bioink formulation.

Rheological Characterization

• A rheometer is used to measure the viscosity and yield stress of the bioink. Viscosity is determined by subjecting the bioink to a logarithmic shear rate sweep, while yield stress is measured using an oscillatory shear strain sweep.
• We evaluate the bioink's storage modulus recovery by subjecting it to three phases of oscillatory shearing, including an initial low-strain phase, a high-strain phase to mimic extrusion through a nozzle, and a final low-strain phase to assess recovery.
• The gelling kinetics of the bioink are determined using a dynamic time sweep, where the crossover point of the storage modulus (G′) and loss modulus (G″) is used to determine the gelation time.

Workflow

Publication Data

Applications

• Bioinks are used to create 3D structures that mimic the properties of natural tissues, enabling the development of functional tissues for transplantation.
• Bioinks can be used to test the efficacy and toxicity of drugs, providing a more accurate model than traditional 2D cell cultures.
• Bioinks help in the repair and regeneration of damaged tissues and organs by providing scaffolds for cell growth and differentiation.

Advantages

• We offer a variety of bioinks based on natural carbohydrates, including chitosan, alginate, carrageenan, gellan gum, methacrylated alginate, methacrylated hyaluronic acid, thiolated hyaluronic acid, and many more.
• We provide a comprehensive solution that covers the entire process from the synthesis of the carbohydrate base material to the formulation of the bioink and its characterization.
• Our bioinks are versatile and can be customized to meet specific requirements in 3D bioprinting.

Frequently Asked Questions

• Which types of tissues can be 3D printed using our bioinks?
  Our bioinks for 3D printing can be designed to create a wide range of tissue types, including but not limited to:
  • Skin
  • Bone
  • Cardio
  • Hepar
• What are the types of bioprinting technologies?
  • Extrusion
  • Droplet
  • Laser-assisted bioprinting

At CD BioGlyco, our GlycoNano™ Bioink Production Service is poised to revolutionize the way functional tissues are created, offering researchers and clinicians unprecedented control and versatility in their work. If you want to push the boundaries of 3D bioprinting by delivering bioinks that set new standards in precision, reliability, and performance, contact us!