Cited by 203Hypothalamic control of reproductive hormonesGenetic and Clinical Aspects of Sex Determination and Chromosomal AbnormalitiesSexual Differentiation and Disorders

Heterogeneity in the mutations responsible for X chromosome-linked Kallmann syndrome

Hardelin, Jean-Pierre, Levilliers, Jacqueline, Blanchard, Stéphane, Carel, Jean-Claude, Leutenegger, Marc, Pinard-Bertelletto, Jean-Pierre, Bouloux, Pierre, Petit, Christine·1993·Human Molecular Genetics

Abstract

Kallmann syndrome represents the association of hypogonadotropic hypogonadism with anosmia. Three modes of transmission, X chromosome-linked, autosomal recessive and autosomal dominant, have been described. The KAL gene, responsible for the X-linked form of the disease, has been isolated and its intron-exon organization recently determined. We have searched for mutations of the KAL gene in 21 unrelated males affected by familial Kallmann syndrome. In these families, segregation of the disease was suggestive of the X-linked mode of transmission. In 2 families, large Xp22.3 deletions, both including the entire KAL gene, have been detected by Southern blot analysis. Here we report the sequence analysis of the entire coding region of the KAL gene in the 19 remaining patients. The approach consisted of sequencing each of the 14 coding exons and splice site junctions. Each exon was amplified by PCR on the genomic DNA, using oligonucleotides from the flanking intronic sequences as specific primers. Nine point mutations were identified at separate locations in four exons and one splice site, providing strong evidence for heterogeneity in mutations responsible for the X-linked Kallmann syndrome. In addition, the high frequency of unilateral renal aplasia in X-linked Kallmann patients (6 out of 11 males with identified alterations of the KAL gene) should be emphasized.

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Crossref · 10.1093/hmg/2.4.373

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  • KAL1 mutations are present in approximately 5-10% of patients with Kallmann syndrome, with the highest prevalence in families with X-linked inheritance.

    “Mutations in KAL1 disrupt the migration of olfactory and GnRH neurons and are reported to be present in approximately 5–10% of patients with Kallmann syndrome (Table 1),7,9–11 with the highest prevalence seen in families with X-linked inheritance patterns.”
  • Mutations in KAL1 disrupt the migration of olfactory and GnRH neurons.

    “Mutations in KAL1 disrupt the migration of olfactory and GnRH neurons”

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Authors
Hardelin, J.-P., Levilliers, J., Blanchard, S., Carel, J.-C., Leutenegger, M., Pinard-Bertelletto, J.-P., Bouloux, P., & Petit, C.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • Hôpital Saint-Vincent-de-Paul (FR)
  • Royal Free London NHS Foundation Trust (GB)
Corresponding author
Petit, Christine
Venue
Human Molecular Genetics
Published
1993
Volume
2
Issue
4
Pages
373-377
ISSN
  • 0964-6906 (ISSN-L)
  • 1460-2083
OpenAlex
W2153635587
Cited by
203
References
0
Citations by year
2024: 1 · 2023: 2 · 2022: 3 · 2021: 1 · 2020: 2 · 2018: 1 · 2017: 2 · 2016: 4 · 2015: 10 · 2014: 4 · 2013: 10 · 2012: 5
FWCI
7.49
Type
journal article
Language
en
Open access
closed
Locations
  • Human Molecular Genetics (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
  • HighWire Press Open Archive (submittedVersion)
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Sexual Differentiation and Disorders
Keywords
KAL1, hypogonadotropic hypogonadism, anosmia, mutational heterogeneity, point mutations, splice site mutation, renal aplasia, X-linked inheritance
MeSH terms
Amino Acid Sequence, Base Sequence, DNA, DNA Mutational Analysis, Humans, Genetic Linkage, Male, Molecular Sequence Data, Mutation, Oligodeoxyribonucleotides, X Chromosome, Point Mutation, Sequence Deletion, Kallmann Syndrome

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