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Subtractive transcriptomics: establishing polarity drives in vitro human endothelial morphogenesis
David A Glesne1, Wen Zhang, Suneeta Mandava
1Biosciences Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
Cancer Research
|April 19, 2006
Summary
Researchers identified 217 genes crucial for capillary formation, distinct from proliferation. These morphogenesis-specific genes offer potential new targets for anti-angiogenic therapies.
Area of Science:
- Cell Biology
- Molecular Biology
- Angiogenesis Research
Background:
- Limited understanding of molecular cues driving endothelial cell assembly into capillaries.
- Previous studies focused on mature capillaries, not initial formation.
- Need to differentiate morphogenesis from proliferation in capillary development.
Purpose of the Study:
- Identify molecular mechanisms of endothelial cell morphogenesis into capillaries.
- Distinguish gene expression related to capillary formation from proliferation.
- Discover novel therapeutic targets for aberrant angiogenesis.
Main Methods:
- Utilized microenvironmental manipulation and microarray analysis.
- Employed subtractive transcriptomics to isolate morphogenesis-specific genes.
- Validated gene and protein expression using quantitative real-time PCR and immunofluorescence.
Main Results:
- Identified 217 morphogenesis-specific genes, largely independent of current anti-angiogenic targets.
- Validated 20% of transcripts and 16 gene products at the protein level.
- Observed sequential upregulation of genes involved in intracellular trafficking, migration, cytoskeleton, adhesion, and proliferation inhibition.
Conclusions:
- Capillary morphogenesis involves sequential gene upregulation for polarity, migration, and adhesion.
- Identified novel gene sets regulating endothelial cell tubulogenesis.
- These findings suggest potential new anti-angiogenic drug targets.