PMID- 8940435 OWN - NLM STAT- MEDLINE DCOM- 19970328 LR - 20210526 IS - 0095-1137 (Print) IS - 1098-660X (Electronic) IS - 0095-1137 (Linking) VI - 34 IP - 12 DP - 1996 Dec TI - Characterization of Mycobacterium tuberculosis complex direct repeat sequence for use in cycling probe reaction. PG - 2985-9 AB - Cycling probe technology (CPT) is a unique and simple method for the detection of specific target sequences. CPT utilizes a chimeric DNA-RNA-DNA probe providing an RNase H-sensitive scissile linkage when bound to a complementary target sequence. For this study a diagnostic assay based on CPT was developed for the detection of the 36-bp direct repeat (DR) region in Mycobacterium tuberculosis. To determine the feasibility of using the DR for detecting M. tuberculosis by CPT, a wide variety of mycobacteria were tested by Southern blot hybridization with three DR probes to verify their specificity. The entire DR region of Mycobacterium bovis 401 was sequenced, and the data were used to design a PCR assay that would allow us to estimate the number of DRs present in a variety of strains. A CPT assay which uses a probe complementary to the DR region was developed and evaluated with synthetic targets and genomic DNA from mycobacteria. In summary, the 36-bp DR provides an attractive target for detecting M. tuberculosis because the sequence is present in high copy numbers in the genome, is specific for the M. tuberculosis complex, and is found in strains that lack IS6110. FAU - Beggs, M L AU - Beggs ML AD - Department of Pathology, University of Arkansas for Medical Sciences, Little Rock, USA. MLBEGGS@life.uams.edu FAU - Cave, M D AU - Cave MD FAU - Marlowe, C AU - Marlowe C FAU - Cloney, L AU - Cloney L FAU - Duck, P AU - Duck P FAU - Eisenach, K D AU - Eisenach KD LA - eng SI - GENBANK/U47864 PT - Comparative Study PT - Journal Article PL - United States TA - J Clin Microbiol JT - Journal of clinical microbiology JID - 7505564 RN - 0 (DNA Probes) RN - 0 (DNA Transposable Elements) RN - 0 (DNA, Bacterial) SB - IM MH - Animals MH - Bacteriological Techniques/statistics & numerical data MH - Base Sequence MH - Cattle MH - DNA Probes/genetics MH - DNA Transposable Elements/genetics MH - DNA, Bacterial/genetics MH - Evaluation Studies as Topic MH - Genome, Bacterial MH - Humans MH - *Molecular Probe Techniques/statistics & numerical data MH - Molecular Sequence Data MH - Mycobacterium bovis/genetics MH - Mycobacterium tuberculosis/*genetics MH - Polymerase Chain Reaction MH - *Repetitive Sequences, Nucleic Acid MH - Sensitivity and Specificity MH - Species Specificity PMC - PMC229446 EDAT- 1996/12/01 00:00 MHDA- 1996/12/01 00:01 PMCR- 1996/12/01 CRDT- 1996/12/01 00:00 PHST- 1996/12/01 00:00 [pubmed] PHST- 1996/12/01 00:01 [medline] PHST- 1996/12/01 00:00 [entrez] PHST- 1996/12/01 00:00 [pmc-release] AID - 10.1128/jcm.34.12.2985-2989.1996 [doi] PST - ppublish SO - J Clin Microbiol. 1996 Dec;34(12):2985-9. doi: 10.1128/jcm.34.12.2985-2989.1996.