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Updated: Jun 14, 2025
Injectable Supramolecular Polymer-Nanoparticle Hydrogels for Cell and Drug Delivery Applications
Published on: February 7, 2021
Encapsulation of human natural killer cells into novel gelatin-based polymeric hydrogel networks
Sibel Cendere1, Ceren Yuksel2, Ercument Ovali3
1Department of Medical Biotechnology, Institute of Health Sciences, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey.
Abstract:
In the innate immune system, natural killer (NK) cells are effector lymphocytes which control several tumor types and microbial infections by limiting disease spread and tissue damage. With tumor cell killing abilities, with no priming or prior activation, NKs are potential anti-cancer therapies. In clinical practice, NKs are used in intravenous injections as they typically grow as suspension, similar to other blood cells. In this study, we designed a novel and effective biomaterial-based platform for NK cell delivery, which includedin situNK cell encapsulation into three-dimensional (3D) biocompatible polymeric scaffolds for potential anti-cancer treatments. Depending on physical cross-linking between an alginate (ALG) polymer and a divalent cation, two natural polymers (gelatin (GEL) and hyaluronic acid (HA)) penetrated into pores and generated an inter-penetrating hydrogel system with improved mechanical properties and stability. After extensive characterization of hydrogels, NK cells were encapsulated inside using ourin situgelation procedure to provide a biomimetic microenvironment.
Insights
This study presents a novel biomaterial scaffold for delivering natural killer (NK) cells. The innovative hydrogel system enhances NK cell delivery for potential anti-cancer therapies.
Area of Science:
- Biomaterials Science
- Immunology
- Cancer Therapy
Background:
- Natural killer (NK) cells are crucial for innate immunity, targeting tumors and infections.
- Current NK cell delivery methods, like intravenous injections, have limitations.
- NK cells hold significant potential as anti-cancer therapies due to their inherent tumor-killing capabilities.
Purpose of the Study:
- To develop a novel biomaterial-based platform for effective NK cell delivery.
- To create a three-dimensional (3D) biocompatible scaffold for in-situ NK cell encapsulation.
- To enhance NK cell delivery for improved anti-cancer treatment potential.
Main Methods:
- Designed an interpenetrating hydrogel system using alginate (ALG), gelatin (GEL), and hyaluronic acid (HA).
- Utilized physical cross-linking with divalent cations to form the hydrogel scaffold.
- Encapsulated NK cells in-situ within the hydrogel to create a biomimetic microenvironment.
Main Results:
- Developed a stable and mechanically robust hydrogel system.
- Successfully encapsulated NK cells within the 3D scaffold.
- Created a biomimetic microenvironment conducive to NK cell function.
Conclusions:
- The novel biomaterial scaffold offers an effective platform for NK cell delivery.
- The 3D hydrogel system shows promise for enhancing NK cell-based anti-cancer therapies.
- This approach provides a new strategy for improving the efficacy of NK cell immunotherapies.
