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Cloning and analysis of the human complement factor H gene promoter
H M Ward1, N H Higgs, T K Blackmore
1Department of Microbiology and Infectious Diseases, Flinders Medical Centre, Bedford Park, Australia. helena.ward@flinders.edu.au
Immunology and Cell Biology
|January 16, 1998
Summary
Researchers identified key promoter elements in the human factor H gene
Area of Science:
- Molecular Biology
- Genetics
Background:
- Human factor H plays a crucial role in regulating the immune system.
- Understanding its gene regulation is vital for therapeutic development.
Purpose of the Study:
- To identify and characterize the promoter region of the human factor H gene.
- To elucidate regulatory elements controlling its expression.
Main Methods:
- Cloning of the 5' flanking region using nested polymerase chain reaction (PCR).
- Sequencing of 1.2 kb of the promoter region.
- Reporter gene assay using chloramphenicol acetyltransferase (CAT) in HeLa cells with various promoter truncations.
Main Results:
- Identification of putative regulatory elements: glucocorticoid response elements, cAMP responsive element, HTF-1, and acute phase signal sequences.
- A 717 bp fragment, specifically the region from -699 to +18, demonstrated promoter activity.
- This region was sufficient to drive transcription of the CAT reporter gene.
Conclusions:
- The region from -699 to +18 contains essential promoter elements for the human factor H gene.
- This finding provides a foundation for further studies into factor H gene regulation and potential therapeutic targeting.