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Morphology, function and pathology of follicular dendritic cells

Y Imal1, M Yamakawa

  • 1Second Department of Pathology, Yamagata University School of Medicine, Japan.

Pathology International
|November 1, 1996
PubMed

Insights

Follicular dendritic cells (FDC) exhibit distinct ultrastructural features and functions within lymphoid follicles (LF). Their roles in B cell development and disease pathogenesis are crucial, with origins potentially from fibroblastic reticulum cells.

Area of Science:

  • Immunology
  • Cell Biology
  • Histology

Background:

  • Lymphoid follicles (LF) are key sites for adaptive immune responses.
  • Dendritic cells, particularly follicular dendritic cells (FDC), play critical roles in LF structure and function.
  • Understanding FDC morphology and function in health and disease is essential for immunology.

Purpose of the Study:

  • To review the ultrastructural morphology and functions of FDC in reactive lymphoid follicles.
  • To elucidate the pathognomonic role of FDC in specific disease conditions.
  • To explore the cellular origin of FDC.

Main Methods:

  • Review of existing literature on FDC ultrastructure and function.
  • Analysis of FDC characteristics in different zones of reactive lymphoid follicles.
  • Examination of FDC roles in autoimmune and immunosuppressive disorders.

Main Results:

  • FDC display distinct ultrastructural features across five follicular zones, correlating with zone-specific functions.
  • FDC express cytokine receptors but primarily produce TGF-beta.
  • FDC are implicated in B cell proliferation and selection, with altered function in autoimmune (hyperfunctional) and immunosuppressive (dysfunctional) diseases.
  • FDC likely originate from fibroblastic reticulum cells.

Conclusions:

  • FDC possess unique ultrastructural and functional properties that vary by follicular zone.
  • FDC play a vital role in B cell dynamics, including migration, proliferation, selection, and differentiation within secondary lymphoid follicles.
  • FDC dysfunction or hyperfunction is associated with specific immune and autoimmune diseases.

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