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Title: Silica bioreplication preserves three-dimensional spheroid structures of human pluripotent stem cells and HepG2 cells

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep13635· OSTI ID:1261097
 [1];  [1];  [2];  [3];  [1];  [1];  [2];  [1]
  1. Univ. of Helsinki (Finland). Centre for Drug Research
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Advanced Materials Lab.; Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Chemical and Biomolecular Engineering
  3. Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Internal Medicine; Univ. of New Mexico, Albuquerque, NM (United States). Center for Micro-Engineered Materials

Three-dimensional (3D) cell cultures produce more in vivo-like multicellular structures such as spheroids that cannot be obtained in two-dimensional (2D) cell cultures. Thus, they are increasingly employed as models for cancer and drug research, as well as tissue engineering. It has proven challenging to stabilize spheroid architectures for detailed morphological examination. Here we overcome this issue using a silica bioreplication (SBR) process employed on spheroids formed from human pluripotent stem cells (hPSCs) and hepatocellular carcinoma HepG2 cells cultured in the nanofibrillar cellulose (NFC) hydrogel. The cells in the spheroids are more round and tightly interacting with each other than those in 2D cultures, and they develop microvilli-like structures on the cell membranes as seen in 2D cultures. Furthermore, SBR preserves extracellular matrix-like materials and cellular proteins. In conclusion, these findings provide the first evidence of intact hPSC spheroid architectures and similar fine structures to 2D-cultured cells, providing a pathway to enable our understanding of morphogenesis in 3D cultures.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FA9550-14-1-0066; CBET-1344298
OSTI ID:
1261097
Journal Information:
Scientific Reports, Vol. 5; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

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Cited By (5)

Quantified forces between HepG2 hepatocarcinoma and WA07 pluripotent stem cells with natural biomaterials correlate with in vitro cell behavior journal May 2019
Hepatocyte Growth Factor: A Microenvironmental Resource for Leukemic Cell Growth journal January 2019
Composites of Polymer Hydrogels and Nanoparticulate Systems for Biomedical and Pharmaceutical Applications journal December 2015
Bioinspired Silicification Reveals Structural Detail in Self-Assembled Peptide Cages journal December 2017
In Vitro Growth of Human Keratinocytes and Oral Cancer Cells into Microtissues: An Aerosol-Based Microencapsulation Technique journal May 2017

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