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At least 541 records · Page 30Linked to original sources
PubMed1998

Single nucleotide polymorphism hunting in cyberspace.

Large-scale sequencing of human cDNA and genomic DNA libraries has produced a large collection of sequence data in public databases. To date, >900,000 human expressed sequence tag (EST) sequences and >80,000,000 bases of genomic DNA sequence have been deposited in Genbank. This ever-expanding data set is a rich source of gene-associated and anonymous single nucleotide polymorphisms (SNPs). DNA sequence variations can be found by comparing the sequences of redundant ESTs and by comparing sequences from overlapping genomic clones. Initial studies have shown that, with proper computer screening, informative SNP markers can be developed from these DNA databases in an efficient and cost-effective manner. Complete public access to these databases will allow individual investigators to add biological value to the human sequence data generated by large-scale sequencing centers.

DNA↗
PubMed2000

Hunting the subset-specific genes of neuroblastoma: expression profiling and differential screening of the full-length-enriched oligo-capping cDNA libraries.

BACKGROUND: Neuroblastoma (NBL) has a distinct nature in different prognostic subgroups. PROCEDURE: To understand the molecular mechanism of NBL's genesis and biology as well as that of the neural crest development, we constructed full-length-enriched cDNA libraries by an oligo-capping method from two different subsets of primary NBL, one with favorable biology and the other with MYCN amplification. RESULTS: Sequencing analysis of these libraries revealed that the expression profile was markedly different between both subsets. To identify the genes differentially expressed between the subsets, semi-quantitative RT-PCR analyses are proceeding. CONCLUSION: So far, 54 transcripts have been found to be expressed at high levels in favorable NBLs, and significantly at low levels in unfavorable NBLs.

Gene Expression Regulation, Neoplastic↗
PubMed2002

Hunting for a hypoglycemia gene: severe neonatal hypoglycemia in a consanguineous family.

Hypoglycemia is a dreaded complication in diabetes mellitus patients treated with insulin, but is also a symptom that is observed in many disorders. In some metabolic diseases of early infancy, low blood glucose is the major presentation and the condition can become life-threatening. Such cases are often attributed to inherited hyperinsulinism. Vidnes and Øyasaeter [1977: Pediatr Res 11:943-949] described a son of consanguineous Pakistani parents with severe neonatal hypoglycemia and concluded that the patient probably suffered from an isolated glucagon deficiency. We have continued the investigation of this family, which now includes a hypoglycemic daughter and two healthy children. The original diagnosis is questioned because the second case of hypoglycemia can be explained by hyperinsulinism. We proceeded with microsatellite marker analysis for selected candidate genes under the assumption that the condition is autosomal recessive and that affected children are homozygous for a mutated allele. The four known genetic causes for inborn hyperinsulinism (mutations in the genes ABCC8, KCNJ11, GLUD1, and GCK) were excluded. Furthermore, we eliminated 13 candidate genes coding for transcription factors involved in pancreas development and differentiation. The analysis was also negative for the genes encoding insulin and glucagon, their receptors, and processing enzymes. The identification of a novel gene for persistent neonatal hypoglycemia can be expected to yield fundamental information about glucose homeostasis, and will therefore have implications for the understanding of diabetes as well.

Blood Glucose↗