Abstract
ABSTRACT The Abdominal B-related Hoxa-10 gene displays similar expression patterns in the differentiating forelimbs and hindlimbs of the mouse, with preferential expression around the humeral and femoral cartilages and more diffuse expression in distal regions. We found that a targeted disruption of Hoxa-10 has almost no effect in the forelimbs, while it affects the proximal hindlimb skeleton. The alterations were located along the dorsolateral side of the femur (labium laterale), with an enlargement and distal shift of the third trochanter, a misshapen lateral knee sesamoid, a supernumerary ‘ligament’ connecting these structures and an occasional duplication of the femoral trochlea. Some Hoxa-10−/− mutant mice developed severe degenerative alterations of the knee articulation upon ageing. Viable Hoxa-10/Hoxd-11 double mutant mice were produced by genetic intercrosses. The compound mutation resulted in synergistic forelimb phenotypic alterations, consisting of: (i) an exacerbation of Hoxd-11−/− phenotypic traits in the carpal and digital region, e.g. more pronounced truncations of the ulna styloid, pyramidal and pisiform bones and of some metacarpal and phalangeal bones and (ii) marked alterations in a more proximal region which is nearly unaffected in Hoxd-11−/− single mutants; the entire radius and ulna were truncated and thickened, with deformations of the ulna proximal extremity. Thus, functional redundancy can occur even between non-paralogous Abdominal B-related Hox genes. The double Hoxa-10/Hoxd-11 mutation also conferred full penetrance to the sacral and caudal vertebrae transforma-tions which are ∽50% penetrant in Hoxd-11−/− single mutants, revealing that functional cooperation can also occur between non-paralogous Hox gene products in axial skeleton patterning.
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Dates
Type | When |
---|---|
Created | 4 years, 4 months ago (April 25, 2021, 10:31 p.m.) |
Deposited | 6 months, 2 weeks ago (Feb. 13, 2025, 5:19 p.m.) |
Indexed | 6 months, 2 weeks ago (Feb. 14, 2025, 12:32 a.m.) |
Issued | 29 years, 6 months ago (Feb. 1, 1996) |
Published | 29 years, 6 months ago (Feb. 1, 1996) |
Published Online | 29 years, 6 months ago (Feb. 1, 1996) |
Published Print | 29 years, 6 months ago (Feb. 1, 1996) |
@article{Favier_1996, title={Functional cooperation between the non-paralogous genes Hoxa-10 and Hoxd-11 in the developing forelimb and axial skeleton}, volume={122}, ISSN={1477-9129}, url={http://dx.doi.org/10.1242/dev.122.2.449}, DOI={10.1242/dev.122.2.449}, number={2}, journal={Development}, publisher={The Company of Biologists}, author={Favier, Bertrand and Rijli, Filippo M. and Fromental-Ramain, Catherine and Fraulob, Valérie and Chambon, Pierre and Dollé, Pascal}, year={1996}, month=feb, pages={449–460} }