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Related Concept Videos

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...
TGF - β Signaling Pathway01:16

TGF - β Signaling Pathway

The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors are of three kinds RI, RII, and RIII. The RI...
Genome-wide Association Studies-GWAS01:11

Genome-wide Association Studies-GWAS

Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
Canonical Wnt Signaling Pathway02:54

Canonical Wnt Signaling Pathway

The gene encoding the main signaling molecules of the Wnt signaling pathways (the Wnt proteins) was discovered almost four decades ago by Nüsslein-Volhard and Wieschaus. They identified and originally named the gene "wingless" (wg) after a phenotype discovered during their landmark genetic screen in Drosophila for body pattern defects. At around the same time, another researcher named Harold Varmus found that a murine tumor virus activates the mammalian wg homolog, Int-1, which results in tumor...
Canonical Wnt Signaling Pathway02:54

Canonical Wnt Signaling Pathway

The gene encoding the main signaling molecules of the Wnt signaling pathways (the Wnt proteins) was discovered almost four decades ago by Nüsslein-Volhard and Wieschaus. They identified and originally named the gene "wingless" (wg) after a phenotype discovered during their landmark genetic screen in Drosophila for body pattern defects. At around the same time, another researcher named Harold Varmus found that a murine tumor virus activates the mammalian wg homolog, Int-1, which results in tumor...
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.
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Related Experiment Videos

Integrative Transcriptomic Analysis and Single-Cell Validation Identify a Six-Hub-Gene Signature Converging on

Xueya Lv1, Yang Yu2, Jiawen Fan2

  • 1Department of Orthopedics Medicine, Beijing Jishuitan Hospital, Capital Medical University, Beijing 100035, China.

Genes
|June 26, 2026
PubMed
Summary

This study identified a six-gene signature in osteoarthritis (OA) cartilage, revealing crosstalk between extracellular matrix (ECM) remodeling, endoplasmic reticulum (ER) stress, and inflammation. This signature may serve as a diagnostic panel for OA.

Keywords:
ECM remodelingER stresscartilagediagnostic modelinflammatory signalingosteoarthritis

Related Experiment Videos

Area of Science:

  • Biochemistry
  • Genomics
  • Molecular Biology

Background:

  • Osteoarthritis (OA) is a complex joint disease involving cartilage degeneration.
  • The interplay between extracellular matrix (ECM) remodeling, endoplasmic reticulum (ER) stress, and inflammation in OA pathogenesis is not fully understood.

Purpose of the Study:

  • To identify diagnostic biomarkers for OA.
  • To explore the mechanistic convergence of key genes in OA cartilage using an integrated transcriptomic framework.

Main Methods:

  • Integrated three independent cartilage transcriptomic datasets.
  • Identified differentially expressed genes (DEGs) and performed functional enrichment analysis (ORA, GSEA).
  • Developed a diagnostic model using LASSO logistic regression and validated it with cross-validation; stratified OA subtypes using consensus clustering; validated cell-type-specific expression using scRNA-seq data.

Main Results:

  • Identified 58 DEGs, predominantly downregulated, enriched in ECM and ER protein processing pathways.
  • A six-gene signature (EIF2S1, GANAB, STT3A, XBP1, MGP, PMP22) was robustly selected and formed a diagnostic model with an AUC of 0.769.
  • Two OA molecular subtypes with distinct unfolded protein response (UPR) and TGF-β pathway activities were identified; virtual gene knockout perturbed key inflammatory pathways (IL-17, NF-κB, chemokine signaling).

Conclusions:

  • A six-gene signature reflecting ECM-ER-inflammatory crosstalk in OA cartilage was identified and validated.
  • Convergent perturbation of inflammatory pathways by distinct hub genes suggests a core mechanism for OA pathogenesis.
  • This signature may serve as a diagnostic panel and a platform for targeted OA therapeutics.