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© Pierre Lafaye
Astrocytes marqués par des anticorps VHH anti-GFAP. Des anticorps d'alpagas dirigés contre une protéine spécifique des astrocytes, la GFAP (Glial Fibrillary Acidic Protein), ont été obtenus à partir de camélidés immunisés. La partie VHH (partie de l'anticorps qui reconnaît l'antigène) a été exprimée sous forme recombinante chez Escherichia coli.
Publication : European journal of immunology

B lineage-restricted rearrangement of a human Ig kappa transgene

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in European journal of immunology - 01 Jul 1997

Cavelier P, Nato F, Coquilleau I, Rolink A, Rougeon F, Goodhardt M

Link to Pubmed [PMID] – 9247570

Eur. J. Immunol. 1997 Jul;27(7):1626-31

To study the control of immunoglobulin kappa light chain gene rearrangement, we generated transgenic mice carrying a germ-line human kappa minilocus (HK) containing the J kappa-proximal V gene, V kappa IV, the V-J intergenic region, the five J kappa segments and the C kappa gene. This construct includes the intronic, but not the 3′ kappa enhancer. Rearrangement of the HK transgene was found to be lymphoid specific and restricted to the B cell lineage. Quantification of kappa gene rearrangement in pre-B cell lines established from HK transgenic mice showed that, like endogenous kappa genes, rearrangement of the transgene is repressed in mu-negative early B cell precursors. These results indicate that rearrangement of the HK transgene is subjected to the same B/T cell and developmental regulation as V kappa-J kappa rearrangement at the endogenous locus. Comparison with an unrearranged kappa transgenic construct lacking the V-J intergenic region, suggests that this region, or elements associated with the proximal V gene, may act to restrict kappa gene rearrangement to the B cell lineage.

http://www.ncbi.nlm.nih.gov/pubmed/9247570