Hydrogel Alginate Considerations for Improved 3D Matrix Stability and Cell Graft Viability and Function in Studying Type 1 Diabetes In Vitro

被引：0

作者：

Quiroz, Victor M. ^{[1
,2
]}

Wang, Yuanjia ^{[1
]}

Rakoski, Amanda I. ^{[1
,2
]}

Kasinathan, Devi ^{[3
]}

Neshat, Sarah Y. ^{[1
,2
]}

Hollister-Lock, Jennifer ^{[4
]}

Doloff, Joshua C. ^{[1
,2
,5
,6
,7
]}

机构：

[1] Johns Hopkins Univ, Wilmer Eye Inst, Sch Med, Translat Tissue Engn Ctr,Dept Biomed Engn, Baltimore, MD 21287 USA

[2] Johns Hopkins Univ, Inst Nanobiotechnol, Baltimore, MD 21218 USA

[3] Johns Hopkins Univ, Dept Physiol, Baltimore, MD 21205 USA

[4] Joslin Diabet Ctr, Res Div, Sect Islet Cell & Regenerat Biol, One Joslin Pl, Boston, MA 02215 USA

[5] Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA

[6] Johns Hopkins Univ, Sch Med, Sidney Kimmel Comprehens Canc Ctr, Dept Oncol, Baltimore, MD 21231 USA

[7] Johns Hopkins Univ, Sch Med, Bloomberg Kimmel Inst Canc Immunotherapy, Baltimore, MD 21231 USA

来源：

ADVANCED BIOLOGY | 2024年 / 8卷 / 08期

基金：

美国国家科学基金会;

关键词：

3D culture; alginate cell encapsulation; material characterization; microphysiological systems; type 1 diabetes cell therapy; DESIGN; BARIUM;

D O I：

10.1002/adbi.202300502

中图分类号：

TB3 [工程材料学]; R318.08 [生物材料学];

学科分类号：

0805 ; 080501 ; 080502 ;

摘要：

Biomedical devices such as islet-encapsulating systems are used for treatment of type 1 diabetes (T1D). Despite recent strides in preventing biomaterial fibrosis, challenges remain for biomaterial scaffolds due to limitations on cells contained within. The study demonstrates that proliferation and function of insulinoma (INS-1) cells as well as pancreatic rat islets may be improved in alginate hydrogels with optimized gel%, crosslinking, and stiffness. Quantitative polymerase chain reaction (qPCR)-based graft phenotyping of encapsulated INS-1 cells and pancreatic islets identified a hydrogel stiffness range between 600 and 1000 Pa that improved insulin Ins and Pdx1 gene expression as well as glucose-sensitive insulin-secretion. Barium chloride (BaCl2) crosslinking time is also optimized due to toxicity of extended exposure. Despite possible benefits to cell viability, calcium chloride (CaCl2)-crosslinked hydrogels exhibited a sharp storage modulus loss in vitro. Despite improved stability, BaCl2-crosslinked hydrogels also exhibited stiffness losses over the same timeframe. It is believed that this is due to ion exchange with other species in culture media, as hydrogels incubated in dIH2O exhibited significantly improved stability. To maintain cell viability and function while increasing 3D matrix stability, a range of useful media:dIH2O dilution ratios for use are identified. Such findings have importance to carry out characterization and optimization of cell microphysiological systems with high fidelity in vitro. The study reports on the phenotypic and secretion response of insulinoma cell- and primary rat islet-laden alginate hydrogels as a function of storage moduli to elucidate an optimal micro-environment for insulin secretion. Effects of barium chloride exposure on cell viability as well as storage modulus loss of alginate in media over time are considered with respect to optimization for in vitro studies.image

引用

页数：14

共 1 条

[1] A Novel Cheap and Easy to Handle Protein Hydrogel for 3D Cell Culture Applications: A High Stability Matrix with Tunable Elasticity and Cell Adhesion Properties
Bodenberger, Nicholas
Paul, Patrick
Kubiczek, Dennis
Walther, Paul
Gottschalk, Kay-Eberhard
Rosenau, Frank
CHEMISTRYSELECT, 2016, 1 (07): : 1353 - 1360

← 1 →