A droplet-based building block approach for bladder smooth muscle cell (SMC) proliferation.

Abstract:

:Tissue engineering based on building blocks is an emerging method to fabricate 3D tissue constructs. This method requires depositing and assembling building blocks (cell-laden microgels) at high throughput. The current technologies (e.g., molding and photolithography) to fabricate microgels have throughput challenges and provide limited control over building block properties (e.g., cell density). The cell-encapsulating droplet generation technique has potential to address these challenges. In this study, we monitored individual building blocks for viability, proliferation and cell density. The results showed that (i) SMCs can be encapsulated in collagen droplets with high viability (>94.2 +/- 3.2%) for four cases of initial number of cells per building block (i.e. 7 +/- 2, 16 +/- 2, 26 +/- 3 and 37 +/- 3 cells/building block). (ii) Encapsulated SMCs can proliferate in building blocks at rates that are consistent (1.49 +/- 0.29) across all four cases, compared to that of the controls. (iii) By assembling these building blocks, we created an SMC patch (5 mm x 5 mm x 20 microm), which was cultured for 51 days forming a 3D tissue-like construct. The histology of the cultured patch was compared to that of a native rat bladder. These results indicate the potential of creating 3D tissue models at high throughput in vitro using building blocks.

journal_name

Biofabrication

journal_title

Biofabrication

authors

Xu F,Moon SJ,Emre AE,Turali ES,Song YS,Hacking SA,Nagatomi J,Demirci U

doi

10.1088/1758-5082/2/1/014105

subject

Has Abstract

pub_date

2010-03-01 00:00:00

pages

014105

issue

1

eissn

1758-5082

issn

1758-5090

pii

S1758-5082(10)31829-1

journal_volume

2

pub_type

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