Contributions of selective knockout studies to understanding cholinesterase disposition and function

Shelley Camp, Limin Zhang, Eric Krejci, Alexandre Dobbertin, Véronique Bernard, Emmanuelle Girard, Ellen G. Duysen, Oksana Lockridge, Antonella De Jaco, Palmer Taylor

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The complete knockout of the acetylcholinesterase gene (AChE) in the mouse yielded a surprising phenotype that could not have been predicted from deletion of the cholinesterase genes in Drosophila, that of a living, but functionally compromised animal. The phenotype of this animal showed a sufficient compromise in motor function that precluded precise characterization of central and peripheral nervous functional deficits. Since AChE in mammals is encoded by a single gene with alternative splicing, additional understanding of gene expression might be garnered from selected deletions of the alternatively spliced exons. To this end, transgenic strains were generated that deleted exon 5, exon 6, and the combination of exons 5 and 6. Deletion of exon 6 reduces brain AChE by 93% and muscle AChE by 72%. Deletion of exon 5 eliminates AChE from red cells and the platelet surface. These strains, as well as knockout strains that selectively eliminate the AChE anchoring protein subunits PRiMA or ColQ (which bind to sequences specified by exon 6) enabled us to examine the role of the alternatively spliced exons responsible for the tissue disposition and function of the enzyme. In addition, a knockout mouse was made with a deletion in an upstream intron that had been identified in differentiating cultures of muscle cells to control AChE expression. We found that deletion of the intronic regulatory region in the mouse essentially eliminated AChE in muscle and surprisingly from the surface of platelets. The studies generated by these knockout mouse strains have yielded valuable insights into the function and localization of AChE in mammalian systems that cannot be approached in cell culture or in vitro.

Original languageEnglish (US)
Pages (from-to)72-77
Number of pages6
JournalChemico-Biological Interactions
Volume187
Issue number1-3
DOIs
StatePublished - Sep 1 2010

Fingerprint

Cholinesterases
Acetylcholinesterase
Genes
Exons
Muscle
Knockout Mice
Platelets
Cell culture
Gene expression
Blood Platelets
Animals
Cells
Phenotype
Gene Expression
Muscles
Gene Knockout Techniques
Nucleic Acid Regulatory Sequences
Gene Deletion
Protein Subunits
Alternative Splicing

Keywords

  • Acetylcholinesterase
  • Alternative splicing
  • Differentiation
  • Knockout mouse

ASJC Scopus subject areas

  • Toxicology

Cite this

Camp, S., Zhang, L., Krejci, E., Dobbertin, A., Bernard, V., Girard, E., ... Taylor, P. (2010). Contributions of selective knockout studies to understanding cholinesterase disposition and function. Chemico-Biological Interactions, 187(1-3), 72-77. https://doi.org/10.1016/j.cbi.2010.02.008

Contributions of selective knockout studies to understanding cholinesterase disposition and function. / Camp, Shelley; Zhang, Limin; Krejci, Eric; Dobbertin, Alexandre; Bernard, Véronique; Girard, Emmanuelle; Duysen, Ellen G.; Lockridge, Oksana; De Jaco, Antonella; Taylor, Palmer.

In: Chemico-Biological Interactions, Vol. 187, No. 1-3, 01.09.2010, p. 72-77.

Research output: Contribution to journalArticle

Camp, S, Zhang, L, Krejci, E, Dobbertin, A, Bernard, V, Girard, E, Duysen, EG, Lockridge, O, De Jaco, A & Taylor, P 2010, 'Contributions of selective knockout studies to understanding cholinesterase disposition and function', Chemico-Biological Interactions, vol. 187, no. 1-3, pp. 72-77. https://doi.org/10.1016/j.cbi.2010.02.008
Camp, Shelley ; Zhang, Limin ; Krejci, Eric ; Dobbertin, Alexandre ; Bernard, Véronique ; Girard, Emmanuelle ; Duysen, Ellen G. ; Lockridge, Oksana ; De Jaco, Antonella ; Taylor, Palmer. / Contributions of selective knockout studies to understanding cholinesterase disposition and function. In: Chemico-Biological Interactions. 2010 ; Vol. 187, No. 1-3. pp. 72-77.
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