Fine mapping of the human preprocortistatin gene (CORT) to neuroblastoma consensus deletion region 1p36.3-->p36.2, but absence of mutations in primary tumors.

• The processed product of the human gene preprocortistatin, the peptide cortistatin-17 (hCST-17), bears a strong structural resemblance to the peptide somatostatin (SST), which has an identical receptor binding domain. CST has affinity to all known SST receptor (SSTR) subtypes. Expression of both SST and its receptors has been shown in previous studies to have biological and clinical significance in neuroblastomas, with a putative role in tumor differentiation and apoptosis in vivo. In this work we have employed radiation hybrid mapping and BAC physical mapping to map the human preprocortistatin gene (CORT) to chromosome region 1p36.3-->p36.2, close to the genetic marker D1S244. D1S244 defines the centromeric border of the smallest region of overlap of deletion in our primary neuroblastoma material. We have also defined the genomic sequence of the gene by BAC sequencing and found that preprocortistatin consists of two exons divided by a 1-kb intron. Two polymorphic sites, neither of which causes amino acid exchange, have been detected in the coding region of the gene. Expression studies showed that preprocortistatin is expressed in neuroblastomas of all different stages, as well as in ganglioneuromas. Through genomic sequencing we made mutation analyses of exonic sequences in 49 primary neuroblastomas of all different stages, but no mutations could be detected.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP  -- Medicinska och farmaceutiska grundvetenskaper -- Medicinsk genetik (hsv//swe)

MEDICAL AND HEALTH SCIENCES  -- Basic Medicine -- Medical Genetics (hsv//eng)

MEDICIN OCH HÄLSOVETENSKAP  -- Medicinska och farmaceutiska grundvetenskaper (hsv//swe)

MEDICAL AND HEALTH SCIENCES  -- Basic Medicine (hsv//eng)

Keyword

Base Sequence

Child

Chromosome Deletion

Chromosomes

Human

Pair 1

genetics

Consensus Sequence

genetics

Contig Mapping

DNA Mutational Analysis

Exons

genetics

Humans

Hybrid Cells

In Situ Hybridization

Fluorescence

Introns

genetics

Lod Score

Loss of Heterozygosity

genetics

Molecular Sequence Data

Mutation

genetics

Neoplasm Staging

Neuroblastoma

genetics

pathology

Neuropeptides

genetics

physiology

Polymorphism

Genetic

genetics

Protein Precursors

genetics

RNA

Messenger

analysis

genetics

Tumor Cells

Cultured

RNA

Publication and Content Type

ref (subject category)

art (subject category)