Dysregulation of Different Modes of Programmed Cell Death in Rheumatoid Arthritis Fibroblast-Like Synoviocyte

Xiaorong Zhi1,2, Hong Zhu1, Xiaoyan Sun1

  • 1School of Clinical and Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China.

Insights

Rheumatoid arthritis (RA) involves complex cell death pathways. Understanding programmed cell death (PCD) in RA offers new therapeutic targets for better patient outcomes.

Area of Science:

  • Immunology
  • Pathology
  • Rheumatology

Background:

  • Rheumatoid arthritis (RA) is a chronic inflammatory joint disease with complex pathogenesis.
  • Despite available treatments like NSAIDs, DMARDs, and bDMARDs, suboptimal outcomes persist for some RA patients.
  • Programmed cell death (PCD) is increasingly recognized as a critical factor in RA pathophysiology.

Purpose of the Study:

  • To systematically review the roles of diverse cell death modalities in rheumatoid arthritis.
  • To explore how dysregulated PCD contributes to RA progression and joint damage.
  • To identify potential new therapeutic targets and inform drug development for RA.

Main Methods:

  • Literature review of programmed cell death (PCD) in rheumatoid arthritis (RA).
  • Analysis of various cell death pathways: apoptosis, necroptosis, ferroptosis, pyroptosis, and autophagy.
  • Synthesis of current understanding of PCD's impact on RA pathogenesis.

Main Results:

  • Dysregulation of multiple PCD pathways, including apoptosis, necroptosis, ferroptosis, pyroptosis, and autophagy, is implicated in RA.
  • These cell death modalities significantly influence the chronic synovitis and joint deformities characteristic of RA.
  • Understanding these mechanisms provides insights into RA's complex pathophysiology.

Conclusions:

  • Targeting specific programmed cell death (PCD) pathways presents a promising strategy for novel RA therapies.
  • Further research into the interplay of different cell death modalities in RA is warranted.
  • This review provides a foundation for developing more effective treatments for rheumatoid arthritis.

Related Concept Videos

T Cell Types and Functions01:24

T Cell Types and Functions

When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
2.1K
The JAK-STAT Signaling Pathway01:20

The JAK-STAT Signaling Pathway

Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as  SH2...
12.0K
Inflammatory Response01:28

Inflammatory Response

An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
15.9K
The Extrinsic Apoptotic Pathway01:17

The Extrinsic Apoptotic Pathway

The extrinsic apoptotic pathway is initiated when extracellular death-inducing signals, such as specific cytokines, activate the death receptors expressed on the cell surface. The immune cells involved in this pathway are natural killer cells (NK cells) and cytotoxic T-lymphocytes. NK cells are critical in innate immune response, while cytotoxic T-lymphocytes are associated with adaptive immune response. These cells recognize specific receptors expressed on the altered cells and activate...
8.1K
Apoptosis01:30

Apoptosis

Apoptosis is a combination of two Greek words, 'apo' and 'ptosis,' meaning separation and falling off, respectively. Hippocrates used this word to describe gangrene, which was caused due to bandaging of fractured bones. Apoptosis was distinguished from necrosis in 1970 when John Kerr reported observations of morphological changes occurring during apoptosis. During one experiment, he observed that the disruption of blood supply to the liver tissue resulted in a size...
14.0K
NF-κB-dependent Signaling Pathway02:26

NF-κB-dependent Signaling Pathway

The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The...
9.8K