TY - JOUR

T1 - CD11b and CD200 on Circulating Monocytes Differentiate Two Angiographic Subtypes of Polypoidal Choroidal Vasculopathy

AU - Subhi, Yousif

AU - Nielsen, Marie Krogh

AU - Molbech, Christopher

AU - Oishi, Akio

AU - Singh, Amardeep

AU - Nissen, Mogens Holst

AU - Sørensen, Torben Lykke

PY - 2017

Y1 - 2017

N2 - Purpose: To investigate surface expression of CD11b and CD200 on circulating monocytes in patients with polypoidal choroidal vasculopathy (PCV).Methods: This was a prospective case-control study of patients with PCV (n = 27), age-matched healthy controls (n = 27), and patients with neovascular AMD (n = 49). All participants underwent a comprehensive ocular examination. Fluorescein and indocyanine green angiography were performed in patients suspected of neovascular AMD or PCV. Polypoidal choroidal vasculopathy was angiographically categorized into those with a strong presence of a branching vascular network (BVN) (type 1) or with a faint/no clear presence of a BVN (type 2). Fresh venous blood was stained with fluorescent antibodies for flow cytometric analyses. We compared the percentages of CD11b+, CD200+, and CD11b+CD200+ monocytes between groups of diagnosis and between different angiographic subtypes of PCV.Results: Overall, CD11b+ monocytes were both increased in patients with PCV and neovascular AMD. CD200+ and CD11b+CD200+ monocytes were increased in patients with neovascular AMD. An age-related increase in CD11b+CD200+ monocytes was absent in patients with PCV and neovascular AMD. Patients with PCV type 1 had significantly higher CD11b+, CD200+, and CD11b+CD200+ monocytes, whereas patients with PCV type 2 had levels similar to that in healthy controls.Conclusions: We found that PCV is immunologically heterogeneous with significant differences between angiographic subtypes. Increased CD11b+ and CD200+ monocytes in those with a strong presence of BVN indicate that BVN development may be associated with retinal injury and a VEGF-mediated process that is either reflected or propelled by systemic changes in monocytes.

AB - Purpose: To investigate surface expression of CD11b and CD200 on circulating monocytes in patients with polypoidal choroidal vasculopathy (PCV).Methods: This was a prospective case-control study of patients with PCV (n = 27), age-matched healthy controls (n = 27), and patients with neovascular AMD (n = 49). All participants underwent a comprehensive ocular examination. Fluorescein and indocyanine green angiography were performed in patients suspected of neovascular AMD or PCV. Polypoidal choroidal vasculopathy was angiographically categorized into those with a strong presence of a branching vascular network (BVN) (type 1) or with a faint/no clear presence of a BVN (type 2). Fresh venous blood was stained with fluorescent antibodies for flow cytometric analyses. We compared the percentages of CD11b+, CD200+, and CD11b+CD200+ monocytes between groups of diagnosis and between different angiographic subtypes of PCV.Results: Overall, CD11b+ monocytes were both increased in patients with PCV and neovascular AMD. CD200+ and CD11b+CD200+ monocytes were increased in patients with neovascular AMD. An age-related increase in CD11b+CD200+ monocytes was absent in patients with PCV and neovascular AMD. Patients with PCV type 1 had significantly higher CD11b+, CD200+, and CD11b+CD200+ monocytes, whereas patients with PCV type 2 had levels similar to that in healthy controls.Conclusions: We found that PCV is immunologically heterogeneous with significant differences between angiographic subtypes. Increased CD11b+ and CD200+ monocytes in those with a strong presence of BVN indicate that BVN development may be associated with retinal injury and a VEGF-mediated process that is either reflected or propelled by systemic changes in monocytes.

U2 - 10.1167/iovs.17-22479

DO - 10.1167/iovs.17-22479

M3 - Journal article

C2 - 29049725

VL - 58

SP - 5242

EP - 5250

JO - Investigative Ophthalmology & Visual Science

JF - Investigative Ophthalmology & Visual Science

SN - 0146-0404

IS - 12

ER -