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Transcription01:10

Transcription

Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Master Transcription Regulators02:23

Master Transcription Regulators

Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a  complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
Transcription01:17

Transcription

Transcription is the synthesis of RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in correctly synthesizing messenger RNA (mRNA). Transcriptional regulation is responsible for the differentiation of different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds of RNA Molecules
In eukaryotes,...
General Transcription Factors01:30

General Transcription Factors

Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
Master Transcription Regulators02:23

Master Transcription Regulators

Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a  complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
Methods of Nuclear Reprogramming01:24

Methods of Nuclear Reprogramming

Nuclear reprogramming is a process of transforming one cell type into an unrelated cell type by epigenetic changes that alter the cell’s original gene expression pattern. Such epigenetic changes force cells to express a different set of genes, which play a significant role in inducing transformation into other cell types. Nuclear reprogramming offers applications in reproductive cloning for livestock propagation and regenerative medicine — developing patient-specific cells for injury repair.

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Transcriptome Profiling of Trabecular Meshwork Progenitor Cells.

Xiaochen Fan1, Stephanie Kennedy1, Emine K Bilir1

  • 1Department of Eye and Vision Science, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, United Kingdom.

Stem Cell Reviews and Reports
|May 27, 2025
PubMed
Summary
This summary is machine-generated.

Trabecular meshwork progenitor cells (TMPCs) have a unique gene expression profile, distinct from other TM cells. This study identifies novel markers and pathways crucial for TMPC function in glaucoma research.

Keywords:
Cell DifferentiationPrimary open-angle glaucomaProgenitor CellsRNA-SeqTrabecular Meshwork

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Area of Science:

  • Ophthalmology
  • Cell Biology
  • Genomics

Background:

  • Loss and dysfunction of trabecular meshwork (TM) cells are linked to aging and primary open-angle glaucoma.
  • The identity and contribution of TM progenitor cells (TMPCs) to TM health remain unclear.

Purpose of the Study:

  • To identify the gene expression profile of human TM progenitor cells (TMPCs).
  • To elucidate the distinct markers and pathways involved in TMPC behavior.

Main Methods:

  • RNA sequencing (RNA-Seq) of primary TM cells (PTM), de-differentiated spheres (TMPCs), and re-differentiated TM cells (DTM).
  • Bioinformatics analysis using Tuxedo, Bowtie2, Tophat, Cufflinks, and IPA.
  • Validation via Nanostring, RT-qPCR, immunocytochemistry, and western blotting.

Main Results:

  • RNA-Seq identified significant differentially expressed genes (DEGs) in TMPCs compared to PTM and DTM cells.
  • 70 DEGs were upregulated in TMPCs; distinct markers like SOX2 and NOTCH1 were identified in TMPCs.
  • Pathway analysis revealed activation of cell cycle, SUMOylation, and STAT3 pathways in TMPCs.

Conclusions:

  • This study reveals a novel gene expression profile for TMPCs, highlighting unique markers and activated pathways.
  • Findings provide critical insights into TMPC behavior relevant to TM physiology and glaucoma pathogenesis.