LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 343

Search options

  1. Article ; Online: Improved Specificity of Glutamate Decarboxylase 65 Autoantibody Measurement Using Luciferase-Based Immunoprecipitation System Assays.

    Wyatt, Rebecca C / Grace, Sian L / Brigatti, Cristina / Marzinotto, Ilaria / Gillard, Ben T / Shoemark, Deborah K / Chandler, Kyla / Achenbach, Peter / Piemonti, Lorenzo / Long, Anna E / Gillespie, Kathleen M / Lampasona, Vito / Williams, Alistair J K

    Diabetes

    2024  Volume 73, Issue 4, Page(s) 565–571

    MeSH term(s) Humans ; Diabetes Mellitus, Type 1 ; Glutamate Decarboxylase ; Sensitivity and Specificity ; Autoantibodies ; Luciferases/genetics ; Immunoprecipitation
    Chemical Substances Glutamate Decarboxylase (EC 4.1.1.15) ; Autoantibodies ; Luciferases (EC 1.13.12.-)
    Language English
    Publishing date 2024-01-17
    Publishing country United States
    Document type Journal Article
    ZDB-ID 80085-5
    ISSN 1939-327X ; 0012-1797
    ISSN (online) 1939-327X
    ISSN 0012-1797
    DOI 10.2337/db23-0550
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: The preanalytical stability of emerging cannabinoid analogs (delta-8 THC and its metabolites, delta-10 THC and carboxy-HHC) in urine.

    Pokhai, Ashley A / Poklis, Justin L / Williams, Grace R / Wolf, Carl E

    Journal of analytical toxicology

    2023  Volume 47, Issue 8, Page(s) 726–731

    Abstract: There has been a surge in the presence and use of cannabinoids since the federal legalization of hemp (Agricultural Improvement Act of 2018). This increase is attributed not only to the use of ∆9-tetrahydrocannabinol (∆9-THC) and cannabidiol, the most ... ...

    Abstract There has been a surge in the presence and use of cannabinoids since the federal legalization of hemp (Agricultural Improvement Act of 2018). This increase is attributed not only to the use of ∆9-tetrahydrocannabinol (∆9-THC) and cannabidiol, the most abundant phytocannabinoid components of cannabis and hemp, respectively, but also to the use of many other emerging THC analogs. Structurally, these analogs are similar to ∆9-THC. Urine specimens for drug analysis are often collected offsite and transported to a laboratory for analysis. Screening assays are usually the first step in urine drug testing. These assays are usually qualitative and automated, which for negative specimens, reduce cost and reporting time. The stability of ∆9-THC and its metabolites has been known for some time; however, the stability of emerging analogs has not been elucidated, and therefore, assuming equivalent storage stability can be erroneous. Previous work assessed the cross-reactivity of ∆8-THC and its major metabolites, the ∆10-THC chiral analogs and the chiral 11-COOH-hexahydrocannabinol analogs. Stability was assessed for each analyte at a concentration two times greater than the analytes' determined decision point. Samples were prepared in drug-free urine at three different pHs (4.5, 7 and 9) and stored at three different temperatures (4°C, 20°C and 45°C) in triplicate. Samples were analyzed utilizing the Lin-Zhi International Cannabinoids Enzyme Immunoassay cannabinoid screening kit calibrated at the 25 ng/mL cut-off. Overall, the cannabinoid analogs produced diminishing instrument responses depending on pH and temperature. The parent analogs were not detected after a single day at 45°C regardless of pH. In general, carboxylic acid analogs at the acidic pH (4.5) produced diminished instrument responses when compared to their counterparts stored at neutral (7) and basic (9) pH. The time, storage temperature and pH of urine specimens may affect the screening results of specimens collected for cannabinoid drug screening.
    MeSH term(s) Cannabinoids/urine ; Dronabinol ; Hallucinogens/urine ; Cannabidiol ; Cannabis
    Chemical Substances Cannabinoids ; Dronabinol (7J8897W37S) ; Hallucinogens ; Cannabidiol (19GBJ60SN5)
    Language English
    Publishing date 2023-08-24
    Publishing country England
    Document type Journal Article
    ZDB-ID 752391-9
    ISSN 1945-2403 ; 0146-4760
    ISSN (online) 1945-2403
    ISSN 0146-4760
    DOI 10.1093/jat/bkad061
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: The cross-reactivity of cannabinoid analogs (delta-8-THC, delta-10-THC and CBD), their metabolites and chiral carboxy HHC metabolites in urine of six commercially available homogeneous immunoassays.

    Wolf, Carl E / Pokhai, Ashley A / Poklis, Justin L / Williams, Grace R

    Journal of analytical toxicology

    2023  Volume 47, Issue 8, Page(s) 732–736

    Abstract: There has been an exponential surge in the presence and use of cannabinoids since the federal legalization of hemp (Agricultural Improvement Act of 2018). This growth is attributed to delta-9-tetrahydrocannabinol (delta-9-THC) and cannabidiol (CBD), the ... ...

    Abstract There has been an exponential surge in the presence and use of cannabinoids since the federal legalization of hemp (Agricultural Improvement Act of 2018). This growth is attributed to delta-9-tetrahydrocannabinol (delta-9-THC) and cannabidiol (CBD), the most abundant phytocannabinoid components of cannabis and hemp, respectively, but with many other emerging THC analogs. Structurally, these analogs are similar to delta-9-THC, yet very little information is available about their potency and even less information is available regarding their detectability using commercially available cannabinoid screening kits. Due to their structural similarity, current cannabinoid homogeneous immunoassay screening methods may be able to detect these emerging cannabinoid analogs and their metabolites. Six urine immunoassay kits (Abbott Cannabinoids-Abbott Diagnostics, LZI Cannabinoids (cTHC) Enzyme Immunoassay-Lin-Zhi International, DRI® Cannabinoid Assay and CEDIA™ THC-Thermo Fisher Scientific, ONLINE DAT Cannabinoid II-Roche Diagnostics and Syva EMIT®II Plus-Siemens Healthineers) were evaluated at two different cutoff concentrations: 50 ng/mL and 20 or 25 ng/mL, assay dependent. The analysis was performed on an Abbott Architect Plus c4000 (Abbott Diagnostics). Delta-8-THC, CBD, olivetol and their major metabolites, and delta-10-THC and HHC carboxylic acid chiral analogs were evaluated. The cross-reactivity was evaluated by preparing each analyte at 20, 50, 100 and 1,000 ng/mL in urine. Analytes that did not cross-react at 1,000 ng/mL for a cutoff were considered not detectable. If detected, the lowest concentration was used as the decision point to determine the precision at the immunoassay's cutoff. The six commercially available urine cannabinoid homogeneous immunoassay screening kits cross reacted with the following analogs: delta-8-THC, 11-OH-delta-8-THC, 11-COOH-delta-8-THC, 6-OH-CBD, 7-OH-CBD, all delta-10-THC and HHC carboxylic acid chiral analogs and olivetol with varying selectivity depending on the screening kit and cutoff concentration. The kits did not cross-react with the following analogs: CBD, 7-COOH-CBD, Abnormal CBD, CBDA-A and olivetolic acid.
    MeSH term(s) Cannabinoids/metabolism ; Cannabidiol ; Cannabis ; Immunoassay ; Carboxylic Acids
    Chemical Substances Cannabinoids ; Cannabidiol (19GBJ60SN5) ; olivetol (65OP0NEZ1P) ; Carboxylic Acids
    Language English
    Publishing date 2023-08-21
    Publishing country England
    Document type Journal Article
    ZDB-ID 752391-9
    ISSN 1945-2403 ; 0146-4760
    ISSN (online) 1945-2403
    ISSN 0146-4760
    DOI 10.1093/jat/bkad059
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Effects of simulation-based flipped classroom in developing head and neck examination skills in dental students.

    Fischer, Kathleen M / Sekula, Michael N / Hannigan, Joseph D / Vaught, Randall L / House, Holly / De Souza, Grace M / Williams, Tarin T

    Journal of dental education

    2024  

    Abstract: Objectives: To evaluate the effectiveness of a simulation-based flipped classroom in developing dental students' head and neck examination skills.: Methods: Second-year dental students (n = 118) participated in a simulation-based flipped classroom ... ...

    Abstract Objectives: To evaluate the effectiveness of a simulation-based flipped classroom in developing dental students' head and neck examination skills.
    Methods: Second-year dental students (n = 118) participated in a simulation-based flipped classroom experience. A pre-class recorded lecture and video were posted online one week before the simulation date. In class, students completed a pre-quiz assessing pre-class coursework understanding of head and neck examination content. Then, students attended a question-and-answer session before the patient simulation. A formative assessment of head and neck examination simulation on a patient in the clinic was completed. Lastly, students completed an in-class post-quiz assessing understanding of head and neck examination content after the simulation, classroom simulation discussion, and open-response survey.
    Results: Student post-quiz scores were significantly higher than pre-quiz scores, with an average improvement of 4.8 ± 7.2 percentage points. There was no difference between male and female improvement in scores. Student survey responses indicated that students liked combining simulation and flipped classroom methodology, flexibility with their schedules, learning at their pace, and opportunities for a deeper level of learning. Students reported wanting more practice sessions for their technical skills and more accessibility to faculty.
    Conclusions: According to this study's results, students had significantly higher post-quiz scores than pre-quiz scores and reported positive perceptions of this combined teaching technique. A simulation-based flipped classroom might be an effective teaching approach for developing head and neck examination skills that can be applied at other dental facilities with potentially similar results.
    Language English
    Publishing date 2024-02-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 410579-5
    ISSN 1930-7837 ; 0022-0337
    ISSN (online) 1930-7837
    ISSN 0022-0337
    DOI 10.1002/jdd.13490
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Determination of 24,25-dihydroxyvitamin D

    Wise, Stephen A / Hahm, Grace / Burdette, Carolyn Q / Tai, Susan S-C / Camara, Johanna E / Sempos, Christopher T / Williams, Emma L

    The Journal of steroid biochemistry and molecular biology

    2023  Volume 231, Page(s) 106318

    Abstract: Ninety archived human serum samples from the Vitamin D External Quality Assessment Scheme (DEQAS) were analyzed using a reference measurement procedure (RMP) based on isotope dilution liquid chromatography - tandem mass spectrometry (ID LC-MS/MS) for the ...

    Abstract Ninety archived human serum samples from the Vitamin D External Quality Assessment Scheme (DEQAS) were analyzed using a reference measurement procedure (RMP) based on isotope dilution liquid chromatography - tandem mass spectrometry (ID LC-MS/MS) for the determination of 24,25-dihydroxyvitamin D
    MeSH term(s) Humans ; Chromatography, Liquid ; Tandem Mass Spectrometry/methods ; Vitamin D ; Vitamins ; Calcifediol ; 24,25-Dihydroxyvitamin D 3
    Chemical Substances 24,25-dihydroxyvitamin D ; Vitamin D (1406-16-2) ; Vitamins ; Calcifediol (P6YZ13C99Q) ; 24,25-Dihydroxyvitamin D 3 (40013-87-4)
    Language English
    Publishing date 2023-05-09
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 1049188-0
    ISSN 1879-1220 ; 0960-0760
    ISSN (online) 1879-1220
    ISSN 0960-0760
    DOI 10.1016/j.jsbmb.2023.106318
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: A randomized-controlled pilot trial of telemedicine-delivered cognitive-behavioral therapy tailored for interstitial cystitis/bladder pain syndrome.

    McKernan, Lindsey C / McGonigle, Trey / Vandekar, Simon N / Crofford, Leslie J / Williams, David A / Clauw, Daniel J / Bruehl, Stephen / Corbett, Blythe A / Dmochowski, Roger R / Walsh, Elizabeth G / Kelly, Anna Grace / Sutherland, Susanna L / Connors, Erin L / Ryden, Anna / Reynolds, William Stuart

    Pain

    2024  

    Language English
    Publishing date 2024-02-27
    Publishing country United States
    Document type Journal Article
    ZDB-ID 193153-2
    ISSN 1872-6623 ; 0304-3959
    ISSN (online) 1872-6623
    ISSN 0304-3959
    DOI 10.1097/j.pain.0000000000003188
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article: Increased levels of anti-BSA antibodies in children with Down syndrome.

    Grace, Sian L / Mortimer, Georgina L / Kozhakhmetova, Aizhan / Leveret, Jamie / Newton, Richard / Reimand, Koit / Shield, Julian P H / Uibo, Raivo / Williams, Alistair J K / Gillespie, Kathleen M

    Frontiers in endocrinology

    2023  Volume 14, Page(s) 1056925

    Abstract: Introduction: Autoimmune diabetes occurs more often in the first 2 years of life in children with Down syndrome (DS) compared with the general population. We previously observed increased frequencies of islet autoantibodies, including insulin ... ...

    Abstract Introduction: Autoimmune diabetes occurs more often in the first 2 years of life in children with Down syndrome (DS) compared with the general population. We previously observed increased frequencies of islet autoantibodies, including insulin autoantibodies (IAA), in children with DS. Assays for IAA using
    Methods: Samples were available from two populations with DS: one from the UK, (UK DS cohort n=106, 58 male, median age 12.5 years) and one from Estonia (Estonian DS cohort: n=121, 65 male, median age 9.75 years). A UK control population was provided by sex and age-matched healthy siblings of probands participating in the Bart's Oxford (BOX) family study of type 1 diabetes. A competitive-displacement radiobinding assay (RBA) and a Dissociation Enhanced Lanthanide Fluoroimmunoassay (DELFIA) were developed to measure and confirm anti-BSA antibody levels. HLA class II genotype was analysed by PCR using sequence specific primers (PCR-SSP).
    Results: Overall, levels of anti-BSA antibodies were increased in those with DS compared with controls (p<0.0001) but this was not HLA associated.
    Conclusion: Increased levels of anti-BSA antibodies may reflect a defect in immune maturation or increased gut permeability in children with DS, increasing their risk of developing autoimmunity.
    MeSH term(s) Animals ; Female ; Cattle ; Child ; Humans ; Male ; Serum Albumin, Bovine ; Down Syndrome ; Diabetes Mellitus, Type 1/genetics ; Autoantibodies ; Insulin
    Chemical Substances Iodine-125 (GVO776611R) ; Serum Albumin, Bovine (27432CM55Q) ; Autoantibodies ; Insulin
    Language English
    Publishing date 2023-02-03
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2592084-4
    ISSN 1664-2392
    ISSN 1664-2392
    DOI 10.3389/fendo.2023.1056925
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: MetSim: Integrated Programmatic Access and Pathway Management for Xenobiotic Metabolism Simulators.

    Groff, Louis / Williams, Antony / Shah, Imran / Patlewicz, Grace

    Chemical research in toxicology

    2024  

    Abstract: Xenobiotic metabolism is a key consideration in evaluating the hazards and risks posed by environmental chemicals. A number of software tools exist that are capable of simulating metabolites, but each reports its predictions in a different format and ... ...

    Abstract Xenobiotic metabolism is a key consideration in evaluating the hazards and risks posed by environmental chemicals. A number of software tools exist that are capable of simulating metabolites, but each reports its predictions in a different format and with varying levels of detail. This makes comparing the performance and coverage of the tools a practical challenge. To address this shortcoming, we developed a metabolic simulation framework called MetSim, which comprises three main components. A graph-based schema was developed to allow metabolism information to be harmonized. The schema was implemented in MongoDB to store and retrieve metabolic graphs for subsequent analysis. MetSim currently includes an application programming interface for four metabolic simulators: BioTransformer, the OECD Toolbox, EPA's chemical transformation simulator (CTS), and tissue metabolism simulator (TIMES). Lastly, MetSim provides functions to help evaluate simulator performance for specific data sets. In this study, a set of 112 drugs with 432 reported metabolites were compiled, and predictions were made using the 4 simulators. Fifty-nine of the 112 drugs were taken from the Small Molecule Pathway Database, with the remainder sourced from the literature. The human models within BioTransformer and CTS (Phase I only) and the rat models within TIMES and the OECD Toolbox (Phase I only) were used to make predictions for the chemicals in the data set. The recall and precision (recall, precision) ranked in order of highest recall for each individual tool were CTS (0.54, 0.017), BioTransformer (0.50, 0.008), Toolbox
    Language English
    Publishing date 2024-04-10
    Publishing country United States
    Document type Journal Article
    ZDB-ID 639353-6
    ISSN 1520-5010 ; 0893-228X
    ISSN (online) 1520-5010
    ISSN 0893-228X
    DOI 10.1021/acs.chemrestox.3c00398
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article: Evaluation of Strontium Interference in Calcium Measurement Procedures and Content in Supplements as Measured by ICP-MS.

    Williams, Grace R / Downs, John W / Wolf, Carl E / Cumpston, Kirk L / Tobarran, Natasha / Wills, Brandon K / Bachmann, Lorin M

    The journal of applied laboratory medicine

    2023  Volume 8, Issue 2, Page(s) 307–318

    Abstract: ... of 1.0 mg/dL (0.114 mmol/L), 2.5 mg/dL (0.284 mmol/L), and 5.0 mg/Dl (0.568 mmol/L) resulted in mean ... mg/dL (0.568 mmol/L). An in-house-developed ICP-MS assay for strontium in commercially available ... mmol/L). Strontium recovery for the ICP-MS assay was 97.1% to 105.3%. The largest amount of strontium ...

    Abstract Background: Bone health supplements containing strontium are available without prescription, however, the effects of strontium interference on clinical laboratory calcium measurement procedures are unknown.
    Methods: To evaluate strontium interference on total calcium measurements, plasma pools with exogenously added strontium were measured by 3 total calcium measurement procedures. For ionized calcium measurements, whole blood pools prepared with exogenously added strontium were measured by 2 ionized calcium measurement procedures. An inductively coupled plasma mass spectrometry assay (ICP-MS) was validated for research measurements of strontium content in commercially available supplements.
    Results: Exogenous strontium addition to plasma caused positive bias for total calcium measurements. Strontium concentrations of 1.0 mg/dL (0.114 mmol/L), 2.5 mg/dL (0.284 mmol/L), and 5.0 mg/Dl (0.568 mmol/L) resulted in mean biases of 1.9% to 3.5%, 4.9% to 9.0%, and 10.8% to 19.2%, respectively, for total calcium measurement procedures. Biases for ionized calcium measurements were less than 4.5% for a strontium concentration of 5.0 mg/dL (0.568 mmol/L). An in-house-developed ICP-MS assay for strontium in commercially available supplements exhibited within-laboratory and within-run coefficients of variation of less than 3%, and a linear response was obtained over the assay analytical measurement range of 10 to 100 000 ng/mL (0.0001 to 1.141 mmol/L). Strontium recovery for the ICP-MS assay was 97.1% to 105.3%. The largest amount of strontium measured in dietary supplements was 395 mg in a 1054 mg tablet.
    Conclusions: Some dietary supplements contain larger amounts of strontium than indicated on the product label. High concentrations of strontium may cause significant interference for total calcium measurement procedures, but ionized calcium measurement procedures are not significantly affected.
    MeSH term(s) Humans ; Calcium ; Dietary Supplements ; Biological Assay ; Correlation of Data ; Strontium
    Chemical Substances Calcium (SY7Q814VUP) ; Strontium (YZS2RPE8LE)
    Language English
    Publishing date 2023-01-26
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ISSN 2576-9456
    ISSN 2576-9456
    DOI 10.1093/jalm/jfac092
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Immunomodulators and risk for breakthrough COVID-19 after third SARS-CoV-2 mRNA vaccine among patients with rheumatoid arthritis: a cohort study.

    Schiff, Abigail E / Wang, Xiaosong / Patel, Naomi J / Kawano, Yumeko / Hanberg, Jennifer L / Kowalski, Emily N / Cook, Claire E / Vanni, Kathleen Mm / Qian, Grace / Bade, Katarina J / Saavedra, Alene A / Srivatsan, Shruthi / Williams, Zachary K / Venkat, Rathnam K / Wallace, Zachary S / Sparks, Jeffrey A

    Annals of the rheumatic diseases

    2024  Volume 83, Issue 5, Page(s) 680–682

    MeSH term(s) Humans ; SARS-CoV-2 ; COVID-19 Vaccines ; Cohort Studies ; mRNA Vaccines ; COVID-19/prevention & control ; Immunologic Factors ; Arthritis, Rheumatoid ; Vaccination ; Antibodies, Viral
    Chemical Substances COVID-19 Vaccines ; mRNA Vaccines ; Immunologic Factors ; Antibodies, Viral
    Language English
    Publishing date 2024-04-11
    Publishing country England
    Document type Letter
    ZDB-ID 7090-7
    ISSN 1468-2060 ; 0003-4967
    ISSN (online) 1468-2060
    ISSN 0003-4967
    DOI 10.1136/ard-2023-225162
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top