Hayashi Y, Kamijo T, Yamamoto M, Murata Y, Phillips JA, Ogawa M, Seo H. A case with isolated growth hormone deficiency caused by compound heterozygous mutations in GH-1: a novel missense mutation in the initiation codon and a 7.6kb deletion.
Growth Horm IGF Res 2007;
17:249-253. [PMID:
17360216 DOI:
10.1016/j.ghir.2007.01.019]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2006] [Revised: 01/30/2007] [Accepted: 01/30/2007] [Indexed: 11/29/2022]
Abstract
OBJECTIVE
To characterize the cause of a sporadic isolated growth hormone deficiency in a single patient.
METHODS
Genomic DNA was extracted from blood samples of the patient and his family. Exons and exon-intron junctions of the GH-1 gene were amplified by PCR and sequenced. To characterize possible GH-1 deletions we performed Southern blot analysis and PCR-restriction fragment length analyses.
RESULTS
An adenine to guanine mutation at the first nucleotide of the initiation codon (Met [ATG](-26)Val [GTG]) of the GH-1 gene was identified in the patient and the mother. A 7.6kb GH-1 deletion was identified in the patient, the brother and the father.
CONCLUSION
The patient was a compound heterozygote for an allele bearing a Met(-26)Val missense mutation inherited from his mother and an allele containing deletion of the entire GH-1 gene inherited from his father. The present missense mutation has not been described previously. Attention should be paid to the heterozygous gene deletion that is difficult to detect by PCR-based genetic analysis. The patient responded to GH replacement therapy fairly well, without developing anti-hGH antibody.
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