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Updated: Nov 13, 2025

An Immunohistopathologic Study to Profile the Folate Receptor Beta Macrophage and Vascular Immune Microenvironment in Giant Cell Arteritis
06:35

An Immunohistopathologic Study to Profile the Folate Receptor Beta Macrophage and Vascular Immune Microenvironment in Giant Cell Arteritis

Published on: February 8, 2019

7.4K

The Immunopathology of Giant Cell Arteritis Across Disease Spectra

Michelle L Robinette1, Deepak A Rao1, Paul A Monach1,2

  • 1Division of Rheumatology, Inflammation, and Immunity, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States.

Frontiers in Immunology
|March 15, 2021
PubMed

Insights

Giant cell arteritis (GCA) involves inflamed arteries in older adults. This review explores GCA

Area of Science:

  • Rheumatology and Immunology
  • Vascular Biology
  • Systemic Vasculitis Research

Background:

  • Giant cell arteritis (GCA) is a granulomatous vasculitis affecting large and medium arteries, primarily in the elderly.
  • Advances in imaging distinguish cranial GCA from large vessel (LV)-GCA, revealing more extensive arterial involvement.
  • GCA shares features with polymyalgia rheumatica (PMR), Takayasu Arteritis (TAK), and clinically isolated aortitis (CIA).

Purpose of the Study:

  • To review the immunopathology of GCA in comparison with LV-GCA, PMR, TAK, and CIA.
  • To elucidate overlapping and distinct features across clinical, epidemiological, imaging, and histological aspects.
  • To propose a mechanistic model for GCA pathogenesis involving circulating immune cells.

Main Methods:

  • Literature review focusing on the immunopathology of GCA.
  • Comparative analysis across GCA variants (cranial vs. LV), GCA/PMR, and granulomatous vasculitides (GCA, TAK, CIA).
  • Discussion of clinical presentation, epidemiology, imaging, and histology.

Main Results:

  • Identifies shared and unique immunopathological pathways in GCA and related conditions.
  • Highlights the role of activated monocytes and CD4+ T cells in arterial damage.
  • Reviews mechanisms of disease progression and treatment response.

Conclusions:

  • GCA pathogenesis involves circulating immune cells infiltrating arteries following an unknown trigger.
  • Understanding these pathways is crucial for differentiating GCA from similar vasculitides.
  • This review provides a framework for future research into GCA and related inflammatory conditions.

Keywords:
CIAGCALVVPMRTakayasugiant cell arteritistemporal arteritisvasculitis

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