. Mice with heritable hemolytic anemias, sph, ja, and nb, are models for human hereditary spherocytosis and elliptocytosis. Genetic mapping of the murine mutations shows tight linkage, if not identify, with structural genes essential for red blood cell integrity. The sph locus codes for alpha spectrin, ja for beta spectrin and nb for ankyrin. Further characterization of the mutations is dependent on acquisition of the complete and normal nucleotide coding sequence of the murine proteins. To this end, we have generated a reticulocyte library and are sequencing contiguous cDNA clones encoding each protein. This information will be used to identify sequence dissimilarities and to generate oligonucleotide primers for transcript amplification and peptide antibodies for protein dissection.
Specific aims are (1) to isolate and sequence the entire cDNA of the normal erythrocyte proteins; (2) to identify the mutated nucleotides in nb/nb ankyrin; (3) to establish the relationship between normal ankyrin isoforms and the nb/nb thiol-protease sensitive 210 kD and the unique 150 kD reticulocyte ankyrins; (4) to determine the distribution of erythrocyte ankyrin in the brain and describe the neurological manifestations of its depletion in nb/nb mice; and (5) to characterize cytoskeletal changes accompanying normal nb/nb, ja/ja and sph/sph erythroid precursor ontogeny in utero.

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Research Project (R01)
Project #
5R01HL029305-12
Application #
2216430
Study Section
Hematology Subcommittee 2 (HEM)
Project Start
1983-04-01
Project End
1995-03-31
Budget Start
1994-04-01
Budget End
1995-03-31
Support Year
12
Fiscal Year
1994
Total Cost
Indirect Cost
Name
Jackson Laboratory
Department
Type
DUNS #
042140483
City
Bar Harbor
State
ME
Country
United States
Zip Code
04609
Birkenmeier, Connie S; Barker, Jane E (2004) Hereditary haemolytic anaemias: unexpected sequelae of mutations in the genes for erythroid membrane skeletal proteins. J Pathol 204:450-9
Wandersee, Nancy J; Olson, Scott C; Holzhauer, Sandra L et al. (2004) Increased erythrocyte adhesion in mice and humans with hereditary spherocytosis and hereditary elliptocytosis. Blood 103:710-6
Wandersee, Nancy J; Birkenmeier, Connie S; Bodine, David M et al. (2003) Mutations in the murine erythroid alpha-spectrin gene alter spectrin mRNA and protein levels and spectrin incorporation into the red blood cell membrane skeleton. Blood 101:325-30
Wandersee, N J; Lee, J C; Deveau, S A et al. (2001) Reduced incidence of thrombosis in mice with hereditary spherocytosis following neonatal treatment with normal hematopoietic cells. Blood 97:3972-5
Wandersee, N J; Roesch, A N; Hamblen, N R et al. (2001) Defective spectrin integrity and neonatal thrombosis in the first mouse model for severe hereditary elliptocytosis. Blood 97:543-50
Peters, L L; Lane, P W; Andersen, S G et al. (2001) Downeast anemia (dea), a new mouse model of severe nonspherocytic hemolytic anemia caused by hexokinase (HK(1)) deficiency. Blood Cells Mol Dis 27:850-60
Dooner, G J; Barker, J E; Gallagher, P G et al. (2000) Gene transfer to ankyrin-deficient bone marrow corrects spherocytosis in vitro. Exp Hematol 28:765-74
Wandersee, N J; Birkenmeier, C S; Gifford, E J et al. (2000) Murine recessive hereditary spherocytosis, sph/sph, is caused by a mutation in the erythroid alpha-spectrin gene. Hematol J 1:235-42
Wandersee, N J; Tait, J F; Barker, J E (2000) Erythroid phosphatidyl serine exposure is not predictive of thrombotic risk in mice with hemolytic anemia. Blood Cells Mol Dis 26:75-83
Barker, J E; Deveau, S; Wandersee, N J (2000) Amelioration of severe hereditary spherocytosis in nonablated adult mice by marrow transplantation. Exp Hematol 28:985-92

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