A novel LHX3 mutation presenting as combined pituitary hormonal deficiency

Amrit P.S. Bhangoo, Chad S. Hunter, Jesse J. Savage, Henry Anhalt, Steven Pavlakis, Emily C. Walvoord, Svetlana Ten, Simon J. Rhodes

Research output: Contribution to journalArticle

66 Scopus citations

Abstract

Context: LHX3 encodes LIM homeodomain class transcription factors with important roles in pituitary and nervous system development. The only previous report of LHX3 mutations described patients with two types of recessive mutations displaying combined pituitary hormone deficiency coupled with neck rigidity. Objective: We report a patient presenting a unique phenotype associated with a novel mutation in the LHX3 gene. Patient: We report a 6-yr, 9-month-old boy born from a consanguineous relationship who presented shortly after birth with cyanosis, feeding difficulty, persistent jaundice, micropenis, and poor weight gain and growth rate. Laboratory data, including an undetectable TSH, low free T4, low IGF-I and IGF binding protein-3, prolactin deficiency, and LH and FSH deficiency were consistent with hypopituitarism. Arigid cervical spine leading to limited head rotation was noticed on follow-up examination. Magnetic resonance imaging revealed an apparently structurally normal cervical spine and a postcontrast hypointense lesion in the anterior pituitary. Results: Analysis of theLHX3gene revealed homozygosity for a novel single-base-pair deletion in exon 2. This mutation leads to a frame shift predicted to result in the production of short, inactive LHX3 proteins. The results of in vitro translation experiments are consistent with this prediction. The parents of the patients are heterozygotes, indicating a recessive mode of action for the deletion allele. Conclusions: The presence of a hypointense pituitary lesion and other clinical findings broadens the phenotype associated with LHX3 gene mutation.

Original languageEnglish (US)
Pages (from-to)747-753
Number of pages7
JournalJournal of Clinical Endocrinology and Metabolism
Volume91
Issue number3
DOIs
StatePublished - Mar 1 2006

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Biochemistry
  • Endocrinology
  • Clinical Biochemistry
  • Biochemistry, medical

Fingerprint Dive into the research topics of 'A novel LHX3 mutation presenting as combined pituitary hormonal deficiency'. Together they form a unique fingerprint.

  • Cite this