DNA probes specific for Entamoeba histolytica possessing pathogenic and nonpathogenic zymodemes. 1989

L I Garfinkel, and M Giladi, and M Huber, and C Gitler, and D Mirelman, and M Revel, and S Rozenblatt
MacArthur Center for Molecular Biology of Parasitic Diseases, Weizmann Institute of Science, Rehovot, Israel.

A number of DNA probes which hybridize to highly abundant DNA sequences of Entamoeba histolytica were developed. Variations in the hybridization patterns of different E. histolytica strains were detected with selected probes. Four types of restriction fragment length patterns were obtained. Of these, the first class belonged to E. invadens and E. histolytica-like var. Laredo. The next two classes consisted of various strains of E. histolytica which were originally isolated from symptomatic patients and possessed pathogenic patterns of isoenzymes (zymodemes), whereas the fourth group contained E. histolytica strains with nonpathogenic zymodemes obtained from asymptomatic carriers. DNA probes, based on DNA sequences specific to E. histolytica isolates with pathogenic and nonpathogenic zymodemes were isolated, and their nucleotide sequences were determined. These probes (P145 and B133) hybridized selectively to DNA of isolates possessing either pathogenic or nonpathogenic isoenzyme patterns. The newly developed probes could be useful for diagnostic purposes and could serve as tools to investigate the molecular basis of pathogenicity and the genetic mechanisms which regulate the variable aggressive behavior of the parasite.

UI MeSH Term Description Entries
D008969 Molecular Sequence Data Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories. Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D009693 Nucleic Acid Hybridization Widely used technique which exploits the ability of complementary sequences in single-stranded DNAs or RNAs to pair with each other to form a double helix. Hybridization can take place between two complimentary DNA sequences, between a single-stranded DNA and a complementary RNA, or between two RNA sequences. The technique is used to detect and isolate specific sequences, measure homology, or define other characteristics of one or both strands. (Kendrew, Encyclopedia of Molecular Biology, 1994, p503) Genomic Hybridization,Acid Hybridization, Nucleic,Acid Hybridizations, Nucleic,Genomic Hybridizations,Hybridization, Genomic,Hybridization, Nucleic Acid,Hybridizations, Genomic,Hybridizations, Nucleic Acid,Nucleic Acid Hybridizations
D004748 Entamoeba histolytica A species of parasitic protozoa causing ENTAMOEBIASIS and amebic dysentery (DYSENTERY, AMEBIC). Characteristics include a single nucleus containing a small central karyosome and peripheral chromatin that is finely and regularly beaded. Endamoeba histolytica,histolytica, Endamoeba
D004749 Entamoebiasis Infection with amoebae of the genus ENTAMOEBA. Infection with E. histolytica causes DYSENTERY, AMEBIC and LIVER ABSCESS, AMEBIC. Entamoeba Infections,Entamoeba histolytica Infection,Entamoeba Infection,Entamoeba histolytica Infections,Entamoebiases,Infection, Entamoeba,Infection, Entamoeba histolytica,Infections, Entamoeba,Infections, Entamoeba histolytica
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D001483 Base Sequence The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence. DNA Sequence,Nucleotide Sequence,RNA Sequence,DNA Sequences,Base Sequences,Nucleotide Sequences,RNA Sequences,Sequence, Base,Sequence, DNA,Sequence, Nucleotide,Sequence, RNA,Sequences, Base,Sequences, DNA,Sequences, Nucleotide,Sequences, RNA
D015139 Blotting, Southern A method (first developed by E.M. Southern) for detection of DNA that has been electrophoretically separated and immobilized by blotting on nitrocellulose or other type of paper or nylon membrane followed by hybridization with labeled NUCLEIC ACID PROBES. Southern Blotting,Blot, Southern,Southern Blot
D015342 DNA Probes Species- or subspecies-specific DNA (including COMPLEMENTARY DNA; conserved genes, whole chromosomes, or whole genomes) used in hybridization studies in order to identify microorganisms, to measure DNA-DNA homologies, to group subspecies, etc. The DNA probe hybridizes with a specific mRNA, if present. Conventional techniques used for testing for the hybridization product include dot blot assays, Southern blot assays, and DNA:RNA hybrid-specific antibody tests. Conventional labels for the DNA probe include the radioisotope labels 32P and 125I and the chemical label biotin. The use of DNA probes provides a specific, sensitive, rapid, and inexpensive replacement for cell culture techniques for diagnosing infections. Chromosomal Probes,DNA Hybridization Probe,DNA Probe,Gene Probes, DNA,Conserved Gene Probes,DNA Hybridization Probes,Whole Chromosomal Probes,Whole Genomic DNA Probes,Chromosomal Probes, Whole,DNA Gene Probes,Gene Probes, Conserved,Hybridization Probe, DNA,Hybridization Probes, DNA,Probe, DNA,Probe, DNA Hybridization,Probes, Chromosomal,Probes, Conserved Gene,Probes, DNA,Probes, DNA Gene,Probes, DNA Hybridization,Probes, Whole Chromosomal

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