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Updated: Jul 28, 2026
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Profiling Individual Human Embryonic Stem Cells by Quantitative RT-PCR
Published on: May 29, 2014
The pattern of gene expression in human CD34(+) stem/progenitor cells.
1Department of Medicine, University of Chicago Medical Center, 5841 South Maryland Avenue, MC2115, Chicago, IL 60637, USA.
Summary
Researchers analyzed gene expression in human stem cells using Serial Analysis of Gene Expression (SAGE). They identified thousands of known and novel gene tags, providing a foundation for studying hematopoietic stem cell gene expression and diseases.
Area of Science:
- Hematology
- Molecular Biology
- Genomics
Background:
- Hematopoietic stem cells (HSCs) are crucial for blood formation.
- Understanding HSC gene expression is vital for diagnosing and treating blood disorders.
Purpose of the Study:
- To analyze gene expression patterns in human primary CD34(+) stem/progenitor cells.
- To identify known and novel genes expressed in HSCs.
- To establish a baseline for studying normal and abnormal hematopoiesis.
Main Methods:
- Serial Analysis of Gene Expression (SAGE) was performed on CD34(+) cells from bone marrow.
- Generation of Longer Sequences from SAGE tags for Gene Identification (GLGI) was used for gene discovery.
- Quantitative analysis of gene expression levels was conducted.
Main Results:
- Over 106,000 SAGE tags were analyzed, identifying 42,399 unique tags.
- 21,546 unique tags matched known sequences (3,687 known genes), while 20,854 were novel.
- Novel tags were generally at lower expression levels compared to known tags.
- GLGI identified genes for 385 of 440 high-copy SAGE tags and generated 198 novel 3' expressed sequence tags.
Conclusions:
- The study provides a comprehensive catalog of gene expression in human HSCs.
- Identified novel genes and expression patterns offer insights into HSC biology.
- This data serves as a foundation for future research into hematopoietic diseases.
