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Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

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The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
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Single-cell transcriptomics reveals peripheral immune responses in non-segmental vitiligo.

Pengju Yang1, Mei Luan1, Weizhe Li1

  • 1Department of Dermatology, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.

Frontiers in Immunology
|December 11, 2023
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Summary

This study used single cell RNA-sequencing to analyze peripheral immune cells in vitiligo patients. It found activated B cells, monocytes, and neutrophils, with regulatory T cells exhibiting pro-inflammatory traits, offering new insights into vitiligo pathogenesis.

Keywords:
B cellsTregsimmune cellsmonocytesneutrophilssingle-cell RNA sequencingvitiligo

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Area of Science:

  • Immunology
  • Dermatology
  • Genomics

Background:

  • Vitiligo is an autoimmune skin condition characterized by melanocyte destruction.
  • Systemic immune activation is linked to vitiligo, but peripheral immune cell function remains understudied.
  • Investigating circulating immune cells is crucial for understanding vitiligo pathogenesis.

Purpose of the Study:

  • To investigate the mechanisms of peripheral immune responses in vitiligo patients.
  • To characterize the cell types and functions of circulating immune cells in vitiligo.
  • To identify potential therapeutic targets for vitiligo.

Main Methods:

  • Single cell RNA-sequencing (scRNA-seq) was performed on peripheral blood mononuclear cells (PBMCs) from vitiligo patients and healthy controls.
  • scRNA-seq identified cell types, gene expression, and intracellular signaling pathways.
  • Key findings were validated using quantitative PCR (qPCR) and flow cytometry.

Main Results:

  • Ten major cell types were identified, including neutrophils, which were noted in PBMCs.
  • Regulatory T cells displayed pro-inflammatory TH1-like properties, while innate immune cells showed enhanced antigen presentation and interferon responses.
  • Activated B cells (especially memory B cells), monocytes, and neutrophils were observed, with specific signaling pathways identified in neutrophils.

Conclusions:

  • The study elucidated the genetic profiles and signaling pathways of peripheral immune cells in vitiligo.
  • Findings provide novel insights into the pathogenesis of vitiligo.
  • This research may aid in identifying potential therapeutic targets for vitiligo treatment.