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Molecular and Clinical Findings in Patients with LHX4 and OTX2 Mutations

Toshihiro Tajima1, Katsura Ishizu, Akie Nakamura

  • 1Department of Pediatrics, Hokkaido University School of Medicine, Hokkaido, Japan.

Clinical Pediatric Endocrinology : Case Reports and Clinical Investigations : Official Journal of the Japanese Society for Pediatric Endocrinology
|August 31, 2013
PubMed

Insights

Genetic mutations in LHX4 and OTX2 cause combined pituitary hormone deficiency (CPHD). Clinical presentation varies widely due to other genetic and environmental factors influencing pituitary development.

Area of Science:

  • Endocrinology
  • Human Genetics
  • Developmental Biology

Background:

  • The pituitary gland is crucial for bodily development and homeostasis, regulated by complex genetic and environmental factors.
  • Combined pituitary hormone deficiency (CPHD) arises from disruptions in the expression or function of key transcription factors during pituitary ontogeny.
  • Several transcription factors, including LHX4 and OTX2, are implicated in the etiology of CPHD.

Purpose of the Study:

  • To review recent findings on mutations in LHX4 and OTX2 associated with pituitary hormone deficiency.
  • To highlight the variability in clinical manifestations and the lack of clear genotype-phenotype correlations in these genetic defects.

Main Methods:

  • Literature review focusing on recent studies of LHX4 and OTX2 mutations.
  • Analysis of clinical data and genetic findings in patients with CPHD.

Main Results:

  • Mutations in LHX4 and OTX2 are significant causes of pituitary hormone deficiency.
  • High variability in clinical phenotypes is observed, even within families, suggesting multifactorial influences.
  • No consistent genotype-phenotype correlation has been established for LHX4 and OTX2 defects.

Conclusions:

  • Phenotypic variability in LHX4 and OTX2 related CPHD suggests the involvement of additional genetic and/or environmental factors.
  • This variability may reflect developmental plasticity in the pituitary gland.
  • Further research is necessary to fully elucidate the etiology of CPHD, as many cases remain unexplained.
Keywords:
LHX4OTX2combined pituitary hormone deficiencymutation

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