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  1. Article ; Online: Efficiency-corrected PCR quantification for identification of prevalence and load of respiratory disease-causing agents in feedlot cattle.

    Barnewall, R J / Marsh, I B / Williams, T M / Cusack, Pmv / Sales, N / Galea, F / Szentirmay, A N / Quinn, J C

    Australian veterinary journal

    2022  Volume 100, Issue 11, Page(s) 539–549

    Abstract: ... for BRD than non-BRD ailments. In addition, M. bovis was rarely detected at feedlot induction but was ...

    Abstract Bovine respiratory disease (BRD) is the most prevalent disease in feedlot cattle worldwide with Bovine alphaherpesvirus 1 (BoAHV1), Histophilus somni, Mannheimia haemolytica, Mycoplasma bovis, Pasteurella multocida and Trueperella pyogenes accepted to be common etiological agents associated with BRD. Although these agents are common in the upper and lower airways in clinical BRD cases, some also exist as normal flora suggesting their presence in the upper airways alone is not necessarily informative with respect to disease status or risk. To determine the relationship between presence, load and disease status, we investigated the relationship between load in the upper airways at induction and active BRD cases in feedlot cattle using efficiency-corrected PCR quantification. By this approach, we were able to accurately determine the prevalence and load of the key BRD agents in the upper respiratory tract showing that cattle in the hospital pen had a higher prevalence, and load, of these agents both singly and in combination compared to cattle sampled at feedlot induction. A combination of agents was the most accurate indicator of BRD risk with cattle with four or more agents detected in the upper airway more likely to be undergoing treatment for BRD than non-BRD ailments. In addition, M. bovis was rarely detected at feedlot induction but was identified at high prevalence in cattle in the hospital pen. These findings present a potential new technological approach for the investigation, analysis and identification of BRD-associated viral and bacterial agents for Australian feedlot systems as well as for BRD disease management and treatment.
    MeSH term(s) Cattle ; Animals ; Prevalence ; Australia/epidemiology ; Mannheimia haemolytica ; Cattle Diseases/epidemiology ; Cattle Diseases/microbiology ; Polymerase Chain Reaction/veterinary ; Bovine Respiratory Disease Complex/epidemiology ; Bovine Respiratory Disease Complex/microbiology
    Language English
    Publishing date 2022-08-18
    Publishing country England
    Document type Journal Article
    ZDB-ID 41542-x
    ISSN 1751-0813 ; 0005-0423
    ISSN (online) 1751-0813
    ISSN 0005-0423
    DOI 10.1111/avj.13200
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Efficiency Correction Is Required for Accurate Quantitative PCR Analysis and Reporting.

    Ruijter, Jan M / Barnewall, Rebecca J / Marsh, Ian B / Szentirmay, Andrew N / Quinn, Jane C / van Houdt, Robin / Gunst, Quinn D / van den Hoff, Maurice J B

    Clinical chemistry

    2021  Volume 67, Issue 6, Page(s) 829–842

    Abstract: Background: Quantitative PCR (qPCR) aims to measure the DNA or RNA concentration in diagnostic and biological samples based on the quantification cycle (Cq) value observed in the amplification curves. Results of qPCR experiments are regularly calculated ...

    Abstract Background: Quantitative PCR (qPCR) aims to measure the DNA or RNA concentration in diagnostic and biological samples based on the quantification cycle (Cq) value observed in the amplification curves. Results of qPCR experiments are regularly calculated as if all assays are 100% efficient or reported as just Cq, ΔCq, or ΔΔCq values.
    Contents: When the reaction shows specific amplification, it should be deemed to be positive, regardless of the observed Cq. Because the Cq is highly dependent on amplification efficiency that can vary among targets and samples, accurate calculation of the target quantity and relative gene expression requires that the actual amplification efficiency be taken into account in the analysis and reports. PCR efficiency is frequently derived from standard curves, but this approach is affected by dilution errors and hampered by properties of the standard and the diluent. These factors affect accurate quantification of clinical and biological samples used in diagnostic applications and collected in challenging conditions. PCR efficiencies determined from individual amplification curves avoid these confounders. To obtain unbiased efficiency-corrected results, we recommend absolute quantification with a single undiluted calibrator with a known target concentration and efficiency values derived from the amplification curves of the calibrator and the unknown samples.
    Summary: For meaningful diagnostics or biological interpretation, the reported results of qPCR experiments should be efficiency corrected. To avoid ambiguity, the Minimal Information for Publications on Quantitative Real-Time PCR Experiments (MIQE) guidelines checklist should be extended to require the methods that were used (1) to determine the PCR efficiency and (2) to calculate the reported target quantity and relative gene expression value.
    MeSH term(s) Calibration ; Genetic Techniques ; Humans ; RNA ; Real-Time Polymerase Chain Reaction
    Chemical Substances RNA (63231-63-0)
    Language English
    Publishing date 2021-04-23
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 80102-1
    ISSN 1530-8561 ; 0009-9147
    ISSN (online) 1530-8561
    ISSN 0009-9147
    DOI 10.1093/clinchem/hvab052
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Efficiency‐corrected PCR quantification for identification of prevalence and load of respiratory disease‐causing agents in feedlot cattle

    Barnewall, RJ / Marsh, IB / Williams, TM / Cusack, PMV / Sales, N / Galea, F / Szentirmay, AN / Quinn, JC

    Australian Veterinary Journal. 2022 Nov., v. 100, no. 11 p.539-549

    2022  

    Abstract: ... for BRD than non‐BRD ailments. In addition, M. bovis was rarely detected at feedlot induction but was ...

    Abstract Bovine respiratory disease (BRD) is the most prevalent disease in feedlot cattle worldwide with Bovine alphaherpesvirus 1 (BoAHV1), Histophilus somni, Mannheimia haemolytica, Mycoplasma bovis, Pasteurella multocida and Trueperella pyogenes accepted to be common etiological agents associated with BRD. Although these agents are common in the upper and lower airways in clinical BRD cases, some also exist as normal flora suggesting their presence in the upper airways alone is not necessarily informative with respect to disease status or risk. To determine the relationship between presence, load and disease status, we investigated the relationship between load in the upper airways at induction and active BRD cases in feedlot cattle using efficiency‐corrected PCR quantification. By this approach, we were able to accurately determine the prevalence and load of the key BRD agents in the upper respiratory tract showing that cattle in the hospital pen had a higher prevalence, and load, of these agents both singly and in combination compared to cattle sampled at feedlot induction. A combination of agents was the most accurate indicator of BRD risk with cattle with four or more agents detected in the upper airway more likely to be undergoing treatment for BRD than non‐BRD ailments. In addition, M. bovis was rarely detected at feedlot induction but was identified at high prevalence in cattle in the hospital pen. These findings present a potential new technological approach for the investigation, analysis and identification of BRD‐associated viral and bacterial agents for Australian feedlot systems as well as for BRD disease management and treatment.
    Keywords Arcanobacterium pyogenes ; Bovine alphaherpesvirus 1 ; Haemophilus somni ; Mannheimia haemolytica ; Mycoplasma bovis ; Pasteurella multocida ; bovine respiratory disease ; cattle ; disease control ; etiology ; feedlots ; flora ; hospitals ; respiratory system ; risk
    Language English
    Dates of publication 2022-11
    Size p. 539-549.
    Publishing place Wiley Publishing Asia Pty Ltd
    Document type Article ; Online
    Note JOURNAL ARTICLE
    ZDB-ID 41542-x
    ISSN 1751-0813 ; 0005-0423
    ISSN (online) 1751-0813
    ISSN 0005-0423
    DOI 10.1111/avj.13200
    Database NAL-Catalogue (AGRICOLA)

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  4. Article: Luminescence probe studies of ionomers-II Steady-state measurements from sulphonated polyethylene and teflon membranes.

    Szentirmay, M N / Prieto, N E / Martin, C R

    Talanta

    2006  Volume 32, Issue 8 Pt 2, Page(s) 745–749

    Abstract: Luminescence probe studies of sulphonated Teflon and sulphonated polyethylene ionomer membranes are described. These studies have shown that the micropolarities of the ionic clusters within these ionomers are quite dynamic, varying with the nature of the ...

    Abstract Luminescence probe studies of sulphonated Teflon and sulphonated polyethylene ionomer membranes are described. These studies have shown that the micropolarities of the ionic clusters within these ionomers are quite dynamic, varying with the nature of the chain material and the membrane water content. These studies also suggest that polymer chain material intrudes into the ionic cluster phase.
    Language English
    Publishing date 2006-01-23
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1500969-5
    ISSN 1873-3573 ; 0039-9140
    ISSN (online) 1873-3573
    ISSN 0039-9140
    DOI 10.1016/0039-9140(85)80177-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Spatial organization of RNA polymerase II transcription in the nucleus.

    Szentirmay, M N / Sawadogo, M

    Nucleic acids research

    2000  Volume 28, Issue 10, Page(s) 2019–2025

    Abstract: In eukaryotic cells, mRNA synthesis is carried out by large, multifunctional complexes that are also involved in coordinating transcription with other nuclear processes. This survey focuses on the distribution and structural arrangement of these ... ...

    Abstract In eukaryotic cells, mRNA synthesis is carried out by large, multifunctional complexes that are also involved in coordinating transcription with other nuclear processes. This survey focuses on the distribution and structural arrangement of these complexes within the nucleus, in relationship with the discrete positioning of particular chromosomal loci. To better understand the link between the spatial organization of the nucleus and the regulation of gene expression, it is necessary to combine information from biochemical studies with results from microscopic observations of preserved nuclear structures. Recent experimental approaches have made this possible. The subnuclear locations of specific chromosome loci, RNA transcripts, RNA polymerases, and transcription and pre-mRNA-processing factors can now be observed with computer-assisted microscopy and specific molecular probes. The results indicate that RNA polymerase II (RNAPII) transcription takes place at discrete sites scattered throughout the nucleoplasm, and that these sites are also the locations of pre-mRNA processing. Transcribing polymerases appear to be grouped into clusters at each transcription site. Cell cycle-dependent zones of transcription and processing factors have been identified, and certain subnuclear domains appear specialized for expression or silencing of particular genes. The arrangement of transcription in the nucleus is dynamic and depends on its transcriptional activity, with the RNAPII itself playing a central role in marshalling the large complexes involved in gene expression.
    MeSH term(s) Animals ; Cell Cycle ; Cell Nucleus/metabolism ; Cell Nucleus/ultrastructure ; Chromosomes/genetics ; Chromosomes/ultrastructure ; Mammals ; RNA Polymerase II/metabolism ; RNA, Messenger/genetics ; RNA, Messenger/metabolism ; Transcription, Genetic
    Chemical Substances RNA, Messenger ; RNA Polymerase II (EC 2.7.7.-)
    Language English
    Publishing date 2000-05-15
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 186809-3
    ISSN 1362-4962 ; 1362-4954 ; 0301-5610 ; 0305-1048
    ISSN (online) 1362-4962 ; 1362-4954
    ISSN 0301-5610 ; 0305-1048
    DOI 10.1093/nar/28.10.2019
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Correction: Determination of the phylogenetic origins of the Árpád Dynasty based on Y chromosome sequencing of Béla the Third.

    Nagy, Péter L / Olasz, Judit / Neparáczki, Endre / Rouse, Nicholas / Kapuria, Karan / Cano, Samantha / Chen, Huijie / Di Cristofaro, Julie / Runfeldt, Goran / Ekomasova, Natalia / Maróti, Zoltán / Jeney, János / Litvinov, Sergey / Dzhaubermezov, Murat / Gabidullina, Lilya / Szentirmay, Zoltán / Szabados, György / Zgonjanin, Dragana / Chiaroni, Jacques /
    Behar, Doron M / Khusnutdinova, Elza / Underhill, Peter A / Kásler, Miklós

    European journal of human genetics : EJHG

    2020  Volume 29, Issue 8, Page(s) 1317

    Language English
    Publishing date 2020-12-29
    Publishing country England
    Document type Published Erratum
    ZDB-ID 1141470-4
    ISSN 1476-5438 ; 1018-4813
    ISSN (online) 1476-5438
    ISSN 1018-4813
    DOI 10.1038/s41431-020-00795-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Determination of the phylogenetic origins of the Árpád Dynasty based on Y chromosome sequencing of Béla the Third.

    Nagy, Péter L / Olasz, Judit / Neparáczki, Endre / Rouse, Nicholas / Kapuria, Karan / Cano, Samantha / Chen, Huijie / Di Cristofaro, Julie / Runfeldt, Goran / Ekomasova, Natalia / Maróti, Zoltán / Jeney, János / Litvinov, Sergey / Dzhaubermezov, Murat / Gabidullina, Lilya / Szentirmay, Zoltán / Szabados, György / Zgonjanin, Dragana / Chiaroni, Jacques /
    Behar, Doron M / Khusnutdinova, Elza / Underhill, Peter A / Kásler, Miklós

    European journal of human genetics : EJHG

    2020  Volume 29, Issue 1, Page(s) 164–172

    Abstract: We set out to identify the origins of the Árpád Dynasty based on genome sequencing of DNA derived from the skeletal remains of Hungarian King Béla III (1172-1196) and eight additional individuals (six males, two females) originally interred at the Royal ... ...

    Abstract We set out to identify the origins of the Árpád Dynasty based on genome sequencing of DNA derived from the skeletal remains of Hungarian King Béla III (1172-1196) and eight additional individuals (six males, two females) originally interred at the Royal Basilica of Székesfehérvár. Y-chromosome analysis established that two individuals, Béla III and HU52 assign to haplogroups R-Z2125 whose distribution centres near South Central Asia with subsidiary expansions in the regions of modern Iran, the Volga Ural region and the Caucasus. Out of a cohort of 4340 individuals from these geographic areas, we acquired whole-genome data from 208 individuals derived for the R-Z2123 haplogroup. From these data we have established that the closest living kin of the Árpád Dynasty are R-SUR51 derived modern day Bashkirs predominantly from the Burzyansky and Abzelilovsky districts of Bashkortostan in the Russian Federation. Our analysis also reveals the existence of SNPs defining a novel Árpád Dynasty specific haplogroup R-ARP. Framed within the context of a high resolution R-Z2123 phylogeny, the ancestry of the first Hungarian royal dynasty traces to the region centering near Northern Afghanistan about 4500 years ago and identifies the Bashkirs as their closest kin, with a separation date between the two populations at the beginning of the first millennium CE.
    MeSH term(s) Chromosomes, Human, Y/genetics ; Famous Persons ; Female ; Human Migration ; Humans ; Hungary ; Male ; Pedigree ; Phylogeny ; Polymorphism, Single Nucleotide ; Sequence Analysis, DNA/methods
    Language English
    Publishing date 2020-07-07
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1141470-4
    ISSN 1476-5438 ; 1018-4813
    ISSN (online) 1476-5438
    ISSN 1018-4813
    DOI 10.1038/s41431-020-0683-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Sarkosyl block of transcription reinitiation by RNA polymerase II as visualized by the colliding polymerases reinitiation assay.

    Szentirmay, M N / Sawadogo, M

    Nucleic acids research

    1994  Volume 22, Issue 24, Page(s) 5341–5346

    Abstract: There are indications that different concentrations of Sarkosyl can block transcription initiation by RNA polymerase II in vitro at different functional steps [Hawley and Roeder (1985) J. Biol. Chem. 260, 8163-8172]. Consequently, this reagent could be a ...

    Abstract There are indications that different concentrations of Sarkosyl can block transcription initiation by RNA polymerase II in vitro at different functional steps [Hawley and Roeder (1985) J. Biol. Chem. 260, 8163-8172]. Consequently, this reagent could be a very useful tool for mechanistic studies. So far, however, evidence for the selectivity of Sarkosyl effects on RNA polymerase II transcription has been only indirect. To directly investigate the effect of Sarkosyl on transcription initiation and reinitiation by RNA polymerase II, we employed the reinitiation assay based on utilization of templates containing G-free cassettes (colliding polymerases reinitiation assay, or CoPRA). These experiments showed unambiguously that, under the appropriate conditions, Sarkosyl can be used to block transcription reinitiation by RNA polymerase II while allowing a first round of initiations from preassembled initiation complexes. This inhibition is not due to a disruption of the SII-dependent elongation of the reinitiated transcripts, and the levels of Sarkosyl that prevent transcription reinitiation coincide with the levels that block preinitiation complex assembly. However, Sarkosyl addition to transcription reactions reconstituted with partially purified transcription factors was found to have several undesirable side effects. The usefulness and limitations of the Sarkosyl-based and CoPRA assays for measurements of transcription reinitiation are discussed.
    MeSH term(s) RNA Polymerase II/antagonists & inhibitors ; RNA Polymerase II/metabolism ; RNA, Messenger/biosynthesis ; Sarcosine/analogs & derivatives ; Sarcosine/pharmacology ; Transcription Factors/isolation & purification ; Transcription Factors/metabolism ; Transcription, Genetic/drug effects
    Chemical Substances RNA, Messenger ; Transcription Factors ; sarkosyl (632GS99618) ; RNA Polymerase II (EC 2.7.7.-) ; Sarcosine (Z711V88R5F)
    Language English
    Publishing date 1994-12-11
    Publishing country England
    Document type Comparative Study ; Journal Article ; Research Support, U.S. Gov't, P.H.S.
    ZDB-ID 186809-3
    ISSN 0305-1048 ; 0301-5610
    ISSN 0305-1048 ; 0301-5610
    DOI 10.1093/nar/22.24.5341
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Synthesis of reinitiated transcripts by mammalian RNA polymerase II is controlled by elongation factor SII.

    Szentirmay, M N / Sawadogo, M

    The EMBO journal

    1993  Volume 12, Issue 12, Page(s) 4677–4684

    Abstract: Previous studies have revealed that the in vitro synthesis of reinitiated transcripts by RNA polymerase II requires an additional activity, designated reinitiation transcription factor (RTF), which is distinct from all of the general class II initiation ... ...

    Abstract Previous studies have revealed that the in vitro synthesis of reinitiated transcripts by RNA polymerase II requires an additional activity, designated reinitiation transcription factor (RTF), which is distinct from all of the general class II initiation factors. While further characterizing this activity, it was found that RTF displays properties indistinguishable from those of the RNA polymerase II elongation factor SII. In addition, Western blot analysis using SII-specific antibodies revealed that human SII is a major component in purified RTF preparations. The functional equivalence of the two proteins was established using recombinant SII, which proved fully capable of substituting for RTF in the reinitiation assay. In these reconstituted reactions, transcription complexes resulting from reinitiation events required SII to proceed through a 400 bp G-free cassette, while complexes resulting from the first round of initiations were SII-independent. Reinitiations can take place in the absence of SII; however, addition of the elongation factor is essential for full extension of the reinitiated transcripts. These results suggest that events taking place at the promoter (e.g. first-round initiations versus reinitiations) can create marked differences in the properties of RNA polymerase II elongation complexes.
    MeSH term(s) Animals ; Blotting, Western ; HeLa Cells ; Humans ; Mice ; RNA Polymerase II/metabolism ; Transcription Factors/metabolism ; Transcription Factors, General ; Transcription, Genetic ; Transcriptional Elongation Factors
    Chemical Substances Transcription Factors ; Transcription Factors, General ; Transcriptional Elongation Factors ; transcription factor S-II ; RNA Polymerase II (EC 2.7.7.-)
    Language English
    Publishing date 1993-12
    Publishing country England
    Document type Journal Article ; Research Support, U.S. Gov't, P.H.S.
    ZDB-ID 586044-1
    ISSN 1460-2075 ; 0261-4189
    ISSN (online) 1460-2075
    ISSN 0261-4189
    DOI 10.1002/j.1460-2075.1993.tb06156.x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Transcription factor requirement for multiple rounds of initiation by human RNA polymerase II.

    Szentirmay, M N / Sawadogo, M

    Proceedings of the National Academy of Sciences of the United States of America

    1991  Volume 88, Issue 23, Page(s) 10691–10695

    Abstract: We have investigated conditions that allow multiple rounds of transcription initiation from the adenovirus major late promoter in an in vitro system derived from HeLa cell nuclear extracts. Templates containing guanine-free cassettes provided a direct ... ...

    Abstract We have investigated conditions that allow multiple rounds of transcription initiation from the adenovirus major late promoter in an in vitro system derived from HeLa cell nuclear extracts. Templates containing guanine-free cassettes provided a direct assay for discriminating between reinitiated transcripts and transcripts generated by a first-round of transcription initiations. When reactions were reconstituted with the previously characterized class II transcription factors (TFIIA, TFIIB, TFIID, TFIIE/F), transcription by human RNA polymerase II from the adenovirus major late promoter was essentially restricted to a single round of initiations. Reinitiations at previously transcribed major late templates required an additional activity, designated reinitiation transcription factor (RTF). The RTF activity could be separated from the required transcription initiation factors. Semipurified human RTF also promoted transcription reinitiations at minimal promoters derived from the human c-myc, histone H4, and heat shock 70-kDa protein genes, indicating that the same reinitiation factor may be utilized by many, if not all, genes. The possible role of RTF in regulating the transcription rate of various class II genes is discussed.
    MeSH term(s) Cloning, Molecular ; Escherichia coli/genetics ; HeLa Cells ; Humans ; Kinetics ; Promoter Regions, Genetic ; RNA Polymerase II/metabolism ; Recombinant Proteins/isolation & purification ; Recombinant Proteins/metabolism ; Templates, Genetic ; Transcription Factor TFIID ; Transcription Factors/genetics ; Transcription Factors/isolation & purification ; Transcription Factors/metabolism ; Transcription, Genetic
    Chemical Substances Recombinant Proteins ; Transcription Factor TFIID ; Transcription Factors ; RNA Polymerase II (EC 2.7.7.-)
    Language English
    Publishing date 1991-12-01
    Publishing country United States
    Document type Journal Article ; Research Support, U.S. Gov't, P.H.S.
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.88.23.10691
    Database MEDical Literature Analysis and Retrieval System OnLINE

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