Cited by 1,164Congenital limb and hand anomaliesGenomics and Chromatin DynamicsHedgehog Signaling Pathway Studies

The DOI matches its Crossref record; 34 of the 35 references it cites were found in a registry or an index.

A long-range Shh enhancer regulates expression in the developing limb and fin and is associated with preaxial polydactyly

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Lettice, L. A.·2003·Human Molecular Genetics

Abstract

Unequivocal identification of the full composition of a gene is made difficult by the cryptic nature of regulatory elements. Regulatory elements are notoriously difficult to locate and may reside at considerable distances from the transcription units on which they operate and, moreover, may be incorporated into the structure of neighbouring genes. The importance of regulatory mutations as the basis of human abnormalities remains obscure. Here, we show that the chromosome 7q36 associated preaxial polydactyly, a frequently observed congenital limb malformation, results from point mutations in a Shh regulatory element. Shh, normally expressed in the ZPA posteriorly in the limb bud, is expressed in an additional ectopic site at the anterior margin in mouse models of PPD. Our investigations into the basis of the ectopic Shh expression identified the enhancer element that drives normal Shh expression in the ZPA. The regulator, designated ZRS, lies within intron 5 of the Lmbr1 gene 1 Mb from the target gene Shh. The ZRS drives the early spatio-temporal expression pattern in the limb of tetrapods. Despite the morphological differences between limbs and fins, an equivalent regulatory element is found in fish. The ZRS contains point mutations that segregate with polydactyly in four unrelated families with PPD and in the Hx mouse mutant. Thus point mutations residing in long-range regulatory elements are capable of causing congenital abnormalities, and possess the capacity to modify gene activity such that a novel gamut of abnormalities is detected.

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  1. Sanders, J.W. Jr and Gasseling, M.T. (1968) Ectodermal-mesenchymal interactions in the origin of limb symmetry. In Fleischmajar, R. and Billingham, R.F. (eds), Ectodermal-Mesenchymal Interactions. Williams and Wilkins, Baltimore, MD, pp. 78-97.

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Metadata

Authors
Lettice, L. A.
Affiliations
Western General Hospital (GB)
Corresponding author
Lettice, L. A.
Venue
Human Molecular Genetics
Published
2003-07-15
Volume
12
Issue
14
Pages
1725-1735
ISSN
  • 0964-6906 (ISSN-L)
  • 1460-2083
OpenAlex
W2145144631
Cited by
1,164
References
35
Citations by year
2026: 26 · 2025: 40 · 2024: 50 · 2023: 58 · 2022: 66 · 2021: 78 · 2020: 52 · 2019: 49 · 2018: 50 · 2017: 50 · 2016: 64 · 2015: 56 · 2014: 78 · 2013: 64 · 2012: 60
FWCI
26.20
Type
journal article
Language
en
Open access
Locations
  • Human Molecular Genetics (publishedVersion)
  • PubMed (publishedVersion)
  • EUR Research Repository (Erasmus University Rotterdam) (publishedVersion)
  • Lirias (submittedVersion, other-oa)
  • EUR Research Repository (Erasmus University Rotterdam) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Developmental Biology › Congenital limb and hand anomalies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Hedgehog Signaling Pathway Studies
Keywords
Sonic hedgehog, preaxial polydactyly, limb bud, fin development, zirconium, LMBR1, point mutations, congenital limb anomalies, chromosome 7q36
MeSH terms
Zona Pellucida Glycoproteins, Animals, Base Sequence, Chromosomes, Human, Pair 7, Egg Proteins, Enhancer Elements, Genetic, Extremities, Female, Humans, Male, Membrane Glycoproteins, Membrane Proteins, Molecular Sequence Data, Pedigree, Receptors, Cell Surface, Trans-Activators, Polydactyly, Takifugu, Mice, Hedgehog Proteins

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