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Related Concept Videos

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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...
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Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...
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Related Experiment Video

Updated: Jun 3, 2025

Induction and Analysis of Epithelial to Mesenchymal Transition
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Activation of the WNT4/ β-catenin/FOXO1 pathway by PDK1 promotes cervical cancer metastasis and EMT process.

Shidong Chen1, Cuixia Zhang2, Honglang Huang3

  • 1Department of Laboratory Medicine, Xiamen Key Laboratory of Genetic Testing, the First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, 55 Zhenhai Road, Siming District, Xiamen, 361003, Fujian, China.

Journal of Molecular Histology
|January 8, 2025
PubMed
Summary
This summary is machine-generated.

Pyruvate dehydrogenase kinase-1 (PDK1) silencing inhibits cervical cancer (CC) progression by reducing cell migration and promoting apoptosis. This targets the WNT4/β-catenin/FOXO1 pathway, offering new therapeutic avenues for CC.

Keywords:
ApoptosisCervical cancerEpithelial-mesenchymal transitionPDK1WNT4/β-catenin/FOXO1

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Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Cervical cancer (CC) progression is influenced by cellular processes like proliferation, migration, and epithelial-mesenchymal transition (EMT).
  • Hypoxia is a common microenvironmental factor in solid tumors, including CC, that can drive cancer aggressiveness.
  • Pyruvate dehydrogenase kinase-1 (PDK1) is implicated in metabolic regulation and cancer cell survival.

Purpose of the Study:

  • To investigate the role of pyruvate dehydrogenase kinase-1 (PDK1) in cervical cancer (CC) cell proliferation, migration, and EMT under hypoxic conditions.
  • To elucidate the molecular mechanisms by which PDK1 influences CC progression.
  • To assess the therapeutic potential of targeting PDK1 in CC.

Main Methods:

  • Established PDK1-silenced CC cell lines using lentiviral shRNA.
  • Assessed cell migration and invasion via scratch and Transwell assays.
  • Evaluated cellular activity, apoptosis, and protein expression using MTT assays and western blotting.
  • Utilized transcriptome sequencing to identify regulatory pathways and xenograft models for in vivo validation.

Main Results:

  • PDK1 silencing significantly reduced CC cell migration, invasion, and cellular activity under hypoxia, while increasing apoptosis.
  • Transcriptomic analysis revealed that PDK1 suppression downregulated the WNT4/β-catenin/FOXO1 pathway, leading to decreased EMT.
  • PDK1 was found to enhance β-catenin stability by inhibiting GSK3β phosphorylation via AKT, thereby promoting EMT and anti-apoptotic gene expression.

Conclusions:

  • PDK1 plays a crucial role in promoting cervical cancer progression, migration, and EMT under hypoxic conditions.
  • Targeting PDK1 modulates the WNT4/β-catenin/FOXO1 pathway, impacting EMT and apoptosis.
  • Inhibition of PDK1 presents a potential novel therapeutic strategy for cervical cancer treatment.