Format

Send to

Choose Destination
JAMA Ophthalmol. 2017 Nov 1;135(11):1156-1162. doi: 10.1001/jamaophthalmol.2017.3458.

Gene Expression Profiling and Heterogeneity of Nonspecific Orbital Inflammation Affecting the Lacrimal Gland.

Author information

1
Casey Eye Institute, Oregon Health & Science University, Portland.
2
Devers Eye Institute, Legacy Health System, Portland, Oregon.
3
Department of Medicine, Oregon Health & Science University, Portland.
4
Oregon Health and Science University-Portland State University School of Public Health, Oregon Health & Science University, Portland.
5
Graduate School of Dentistry, Kyung Hee University, Seoul, Korea.
6
Integrated Genomics Laboratory, Oregon Health & Science University, Portland.
7
Department of Ophthalmology, Emory University, Atlanta, Georgia.
8
Research Department, King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia.
9
Department of Ophthalmology and Visual Sciences, University of British Columbia, Vancouver, British Columbia, Canada.
10
Department of Ophthalmology, Ohio University, Columbus.
11
Ophthalmic Surgeons and Consultants of Ohio, Columbus.
12
Department of Ophthalmology, The Ohio State University, Columbus.
13
Department of Ophthalmology, Medical College of Wisconsin, Milwaukee.
14
Department of Ophthalmology, Kaohsiung Veteran's General Hospital, Kaohsiung City, Taiwan.
15
Department of Ophthalmology, University of Miami, Miami, Florida.
16
Department of Ophthalmology, Columbia University, New York, New York.
17
Ophthalmology Network, Royal Adelaide Hospital, Adelaide, Australia.
18
Department of Ophthalmology, Wake Forest University, Winston-Salem, North Carolina.
19
Department of Ophthalmology, University of California, San Diego.
20
currently in private practice in Oakland, California.
21
Department of Ophthalmology, University of West Virginia, Morgantown.

Abstract

Importance:

Although a variety of well-characterized diseases, such as sarcoidosis and granulomatosis with polyangiitis, affect the lacrimal gland, many patients with dacryoadenitis are diagnosed as having nonspecific orbital inflammation (NSOI) on the basis of histology and systemic disease evaluation. The ability to further classify the disease in these patients should facilitate selection of effective therapies.

Objective:

To test the a priori hypothesis that gene expression profiles would complement clinical and histopathologic evaluations in identifying well-characterized diseases and in subdividing NSOI into clinically relevant groups.

Design, Setting, and Participants:

In this cohort study, gene expression levels in biopsy specimens of inflamed and control lacrimal glands were measured with microarrays. Stained sections of the same biopsy specimens were used for evaluation of histopathology. Tissue samples of patients were obtained from oculoplastic surgeons at 7 international centers representing 4 countries (United States, Saudi Arabia, Canada, and Taiwan). Gene expression analysis was done at Oregon Health & Science University. Participants were 48 patients, including 3 with granulomatosis with polyangiitis, 28 with NSOI, 7 with sarcoidosis, 4 with thyroid eye disease, and 6 healthy controls. The study dates were March 2012 to April 2017.

Main Outcomes and Measures:

The primary outcome was subdivision of biopsy specimens based on gene expression of a published list of approximately 40 differentially expressed transcripts in blood, lacrimal gland, and orbital adipose tissue from patients with sarcoidosis. Stained sections were evaluated for inflammation (none, mild, moderate, or marked), granulomas, nodules, or fibrosis by 2 independent ocular pathologists masked to the clinical diagnosis.

Results:

Among 48 patients (mean [SD] age, 41.6 [19.0] years; 32 [67%] female), the mclust algorithm segregated the biopsy specimens into 4 subsets, with the differences illustrated by a heat map and multidimensional scaling plots. Most of the sarcoidosis biopsy specimens were in subset 1, which had the highest granuloma score. Three NSOI biopsy specimens in subset 1 had no apparent granulomas. Thirty-two percent (9 of 28) of the NSOI biopsy specimens could not be distinguished from biopsy specimens of healthy controls in subset 4, while other examples of NSOI tended to group with gene expression resembling granulomatosis with polyangiitis or thyroid eye disease. The 4 subsets could also be partially differentiated by their fibrosis, granulomas, and inflammation pathology scores but not their lymphoid nodule scores.

Conclusions and Relevance:

Gene expression profiling discloses clear heterogeneity among patients with lacrimal inflammatory disease. Comparison of the expression profiles suggests that a subset of patients with nonspecific dacryoadenitis might have a limited form of sarcoidosis, while other patients with NSOI cannot be distinguished from healthy controls.

PMID:
28975236
PMCID:
PMC6033262
DOI:
10.1001/jamaophthalmol.2017.3458
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Silverchair Information Systems Icon for PubMed Central
Loading ...
Support Center