Related Experiment Videos
Human erythropoietin receptor: cloning, expression, and biologic characterization
S S Jones1, A D D'Andrea, L L Haines
1Genetics Institute, Cambridge, MA 02140.
Blood
|July 1, 1990
Summary
Researchers identified the human erythropoietin receptor (hEPO-R), finding it 82% similar to the mouse version. This discovery enables new research into EPO-R function and related diseases.
Area of Science:
- Molecular Biology
- Hematology
- Cell Biology
Background:
- The erythropoietin receptor (EPO-R) is crucial for red blood cell production.
- Understanding the human EPO-R is key to studying erythropoiesis and related disorders.
Purpose of the Study:
- To isolate and characterize the human homologue of the murine erythropoietin receptor (mEPO-R).
- To confirm the functional expression of the human EPO-R in a cellular context.
Main Methods:
- Isolation of human EPO-R cDNA from erythroleukemia cells (OCIM1) and fetal liver.
- Heterologous expression of human EPO-R cDNA in COS cells.
- Immunoprecipitation and cross-linking studies with radioiodinated erythropoietin (EPO).
- Transfection of the human EPO-R cDNA into Ba/F3 cells to assess EPO-dependency.
Main Results:
- The human EPO-R cDNA and protein sequence showed 82% homology to mEPO-R.
- Expressed human EPO-R in COS cells resulted in a ~66 kDa protein.
- Specific immunoprecipitation confirmed receptor identity.
- Cross-linking studies indicated apparent molecular weights of 66 and 100 kDa.
- Ba/F3 cells transfected with human EPO-R became EPO-dependent for growth.
Conclusions:
- The human EPO-R has been successfully isolated and characterized.
- The human EPO-R is functionally expressed and binds EPO.
- The transfected human EPO-R confers EPO-dependency, validating its role in EPO signaling.