Volume 62, Issue 3 pp. 742-752
Synovium

Synovial fibroblasts self-direct multicellular lining architecture and synthetic function in three-dimensional organ culture

Hans P. Kiener

Hans P. Kiener

Medical University of Vienna, Vienna, Austria

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Gerald F. M. Watts

Gerald F. M. Watts

Brigham and Women's Hospital, Boston, Massachusetts

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Yajun Cui

Yajun Cui

Case-Western School of Medicine, Cleveland, Ohio

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John Wright

John Wright

Brigham and Women's Hospital, Boston, Massachusetts

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Thomas S. Thornhill

Thomas S. Thornhill

Brigham and Women's Hospital, Boston, Massachusetts

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Markus Sköld

Markus Sköld

Brigham and Women's Hospital, Boston, Massachusetts

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Samuel M. Behar

Samuel M. Behar

Brigham and Women's Hospital, Boston, Massachusetts

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Birgit Niederreiter

Birgit Niederreiter

Medical University of Vienna, Vienna, Austria

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Jun Lu

Jun Lu

Brigham and Women's Hospital, Boston, Massachusetts

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Manuela Cernadas

Manuela Cernadas

Brigham and Women's Hospital, Boston, Massachusetts

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Anthony J. Coyle

Anthony J. Coyle

MedImmune, Inc., Gaithersburg, Maryland

Drs. Coyle and Sims own stock or stock options in MedImmune/AstraZeneca.

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Gary P. Sims

Gary P. Sims

MedImmune, Inc., Gaithersburg, Maryland

Drs. Coyle and Sims own stock or stock options in MedImmune/AstraZeneca.

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Josef Smolen

Josef Smolen

Medical University of Vienna, Vienna, Austria

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Matthew L. Warman

Matthew L. Warman

Children's Hospital Boston, Boston, Massachusetts

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Michael B. Brenner

Michael B. Brenner

Brigham and Women's Hospital, Boston, Massachusetts

Dr. Brenner has received consulting fees from Synovex (more than $10,000), owns stock options in Synovex, and holds patents on cadherin-11, licensed to Synovex.

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David M. Lee

Corresponding Author

David M. Lee

Brigham and Women's Hospital, Boston, Massachusetts

Dr. Lee has received consulting fees from UCB, Astellas, and Resolvyx (less than $10,000 each) as well as from Synovex (more than $10,000), he owns stock or stock options in Synovex, and together with Synovex, he holds a patent for anti–cadherin 11 (also expressed on fibroblast-like synoviocytes).

Division of Rheumatology, Immunology, and Allergy, Brigham and Women's Hospital, Harvard Medical School, Smith 552, 1 Jimmy Fund Way, Boston, MA 02115Search for more papers by this author
First published: 07 January 2010
Citations: 96

Abstract

Objective

To define the intrinsic capacity of fibroblast-like synoviocytes (FLS) to establish a 3-dimensional (3-D) complex synovial lining architecture characterized by the multicellular organization of the compacted synovial lining and the elaboration of synovial fluid constituents.

Methods

FLS were cultured in spherical extracellular matrix (ECM) micromasses for 3 weeks. The FLS micromass architecture was assessed histologically and compared with that of dermal fibroblast controls. Lubricin synthesis was measured via immunodetection. Basement membrane matrix and reticular fiber stains were performed to examine ECM organization. Primary human and mouse monocytes were prepared and cocultured with FLS in micromass to investigate cocompaction in the lining architecture. Cytokine stimuli were applied to determine the capacity for inflammatory architecture rearrangement.

Results

FLS, but not dermal fibroblasts, spontaneously formed a compacted lining architecture over 3 weeks in the 3-D ECM micromass organ cultures. These lining cells produced lubricin. FLS rearranged their surrounding ECM into a complex architecture resembling the synovial lining and supported the survival and cocompaction of monocyte/macrophages in the neo–lining structure. Furthermore, when stimulated by cytokines, FLS lining structures displayed features of the hyperplastic rheumatoid arthritis synovial lining.

Conclusion

This 3-D micromass organ culture method demonstrates that many of the phenotypic characteristics of the normal and the hyperplastic synovial lining in vivo are intrinsic functions of FLS. Moreover, FLS promote survival and cocompaction of primary monocytes in a manner remarkably similar to that of synovial lining macrophages. These findings provide new insight into inherent functions of the FLS lineage and establish a powerful in vitro method for further investigation of this lineage.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.

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