Linked Life Data

8316431

Source:http://linkedlifedata.com/resource/pubmed/id/8316431

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
1993-7-27
pubmed:databankReference
pubmed:abstractText
The polymerase chain reaction (PCR) has been used to amplify in vitro a semi-conserved region of a gene encoding an M(r) 68-72,000 surface antigen of Giardia intestinalis trophozoites. Using primers specific for conserved nucleotide sequences identified within the promoter-distal portion of two homologous genes (tsp11 and tsa417) cloned previously from the G. intestinalis isolates Ad-1 (from Australia) and WB (from Afghanistan), a single PCR-amplified DNA fragment of the expected size (0.52 kilobases) was obtained in high yield from either purified DNA or whole trophozoites of the Ad-1 isolate and from every 1 to 9 other axenic G. intestinalis isolates belonging to genetic groups I and II (defined previously on the basis of allozyme electrophoresis data--Andrews et al. 1989). Discernible product was recovered from as few as 2-4 trophozoites. In contrast, 6 G. intestinalis isolates that were assigned by allozymic analysis to genetic groups III/IV yielded small amounts of a 0.37-kilobase (kb) amplification product (with evidence in some samples of an additional 0.4 or 0.18 kb fragment) but no 0.52 kb product. Two animal-derived isolates of G. duodenalis (one from an Australian native rodent, Notomys alexis, the other from a domestic cat) also yielded a single 0.37 kb PCR-amplified fragment, whereas an isolate from another cat produced a 0.34 kb fragment. No product was recovered from G. muris, a morphologically distinct species of Giardia. The results demonstrate that different genotypes of G. duodenalis can be distinguished using this assay and that it is diagnostic for isolates belonging to two major clusters (groups I/II and III/IV) of G. intestinalis. The amplified DNA segment appears to be relatively conserved among group I and group II isolates of G. intestinalis. A related but clearly distinct sequence seems to be conserved among group III/IV isolates of G. intestinalis and some isolates of G. duodenalis.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0031-1820
pubmed:author
pubmed:issnType
Print
pubmed:volume
106 ( Pt 4)
pubmed:geneSymbol
tsa417, tsp11
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
347-56
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed-meshheading:8316431-Animals, pubmed-meshheading:8316431-Antigens, Protozoan, pubmed-meshheading:8316431-Antigens, Surface, pubmed-meshheading:8316431-Base Sequence, pubmed-meshheading:8316431-Cell Differentiation, pubmed-meshheading:8316431-Conserved Sequence, pubmed-meshheading:8316431-DNA, Protozoan, pubmed-meshheading:8316431-Deoxyribonucleases, Type II Site-Specific, pubmed-meshheading:8316431-Genes, Protozoan, pubmed-meshheading:8316431-Genetic Variation, pubmed-meshheading:8316431-Genotype, pubmed-meshheading:8316431-Giardia lamblia, pubmed-meshheading:8316431-Humans, pubmed-meshheading:8316431-Molecular Sequence Data, pubmed-meshheading:8316431-Polymerase Chain Reaction, pubmed-meshheading:8316431-Protozoan Proteins, pubmed-meshheading:8316431-Rodentia, pubmed-meshheading:8316431-Sequence Homology, Nucleic Acid
pubmed:year
1993
pubmed:articleTitle
Differentiation of major genotypes of Giardia intestinalis by polymerase chain reaction analysis of a gene encoding a trophozoite surface antigen.
pubmed:affiliation
Department of Microbiology and Immunology, University of Adelaide, South Australia.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't