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  1. Article: Mutational basis of serum cross-neutralization profiles elicited by infection or vaccination with SARS-CoV-2 variants.

    Wagh, Kshitij / Shen, Xiaoying / Theiler, James / Girard, Bethany / Marshall, Jean-Claude / Montefiori, David C / Korber, Bette

    bioRxiv : the preprint server for biology

    2023  

    Abstract: A series of SARS-CoV-2 variants emerged during the pandemic under selection for neutralization resistance. Convalescent and vaccinated sera show consistently different cross-neutralization profiles depending on infecting or vaccine variants. To ... ...

    Abstract A series of SARS-CoV-2 variants emerged during the pandemic under selection for neutralization resistance. Convalescent and vaccinated sera show consistently different cross-neutralization profiles depending on infecting or vaccine variants. To understand the basis of this heterogeneity, we modeled serum cross-neutralization titers for 165 sera after infection or vaccination with historically prominent lineages tested against 18 variant pseudoviruses. Cross-neutralization profiles were well captured by models incorporating autologous neutralizing titers and combinations of specific shared and differing mutations between the infecting/vaccine variants and pseudoviruses. Infecting/vaccine variant-specific models identified mutations that significantly impacted cross-neutralization and quantified their relative contributions. Unified models that explained cross-neutralization profiles across all infecting and vaccine variants provided accurate predictions of holdout neutralization data comprising untested variants as infecting or vaccine variants, and as test pseudoviruses. Finally, comparative modeling of 2-dose versus 3-dose mRNA-1273 vaccine data revealed that the third dose overcame key resistance mutations to improve neutralization breadth.
    Highlights: Modeled SARS-CoV-2 cross-neutralization using mutations at key sitesIdentified resistance mutations and quantified relative impactAccurately predicted holdout variant and convalescent/vaccine sera neutralizationShowed that the third dose of mRNA-1273 vaccination overcomes resistance mutations.
    Language English
    Publishing date 2023-08-14
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2023.08.13.553144
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Neutralization of Omicron Subvariant BA.2.75 after Bivalent Vaccination.

    Chalkias, Spyros / Feng, Jing / Chen, Xing / Zhou, Honghong / Marshall, Jean-Claude / Girard, Bethany / Tomassini, Joanne E / Kuter, Barbara J / Montefiori, David C / Das, Rituparna

    The New England journal of medicine

    2022  Volume 387, Issue 23, Page(s) 2194–2196

    Language English
    Publishing date 2022-11-23
    Publishing country United States
    Document type Letter
    ZDB-ID 207154-x
    ISSN 1533-4406 ; 0028-4793
    ISSN (online) 1533-4406
    ISSN 0028-4793
    DOI 10.1056/NEJMc2212772
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Mutational basis of serum cross-neutralization profiles elicited by infection or vaccination with SARS-CoV-2 variants

    Wagh, Kshitij / Shen, Xiaoying / Theiler, James / Girard, Bethany / Marshall, Jean-Claude / Montefiori, David / Korber, Bette

    bioRxiv

    Abstract: A series of SARS-CoV-2 variants emerged during the pandemic under selection for neutralization resistance. Convalescent and vaccinated sera show consistently different cross-neutralization profiles depending on infecting or vaccine variants. To ... ...

    Abstract A series of SARS-CoV-2 variants emerged during the pandemic under selection for neutralization resistance. Convalescent and vaccinated sera show consistently different cross-neutralization profiles depending on infecting or vaccine variants. To understand the basis of this heterogeneity, we modeled serum cross-neutralization titers for 165 sera after infection or vaccination with historically prominent lineages tested against 18 variant pseudoviruses. Cross-neutralization profiles were well captured by models incorporating autologous neutralizing titers and combinations of specific shared and differing mutations between the infecting/vaccine variants and pseudoviruses. Infecting/vaccine variant-specific models identified mutations that significantly impacted cross-neutralization and quantified their relative contributions. Unified models that explained cross-neutralization profiles across all infecting and vaccine variants provided accurate predictions of holdout neutralization data comprising untested variants as infecting or vaccine variants, and as test pseudoviruses. Finally, comparative modeling of 2-dose versus 3-dose mRNA-1273 vaccine data revealed that the third dose overcame key resistance mutations to improve neutralization breadth.
    Keywords covid19
    Language English
    Publishing date 2023-08-14
    Publisher Cold Spring Harbor Laboratory
    Document type Article ; Online
    DOI 10.1101/2023.08.13.553144
    Database COVID19

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  4. Article ; Online: Current challenges and opportunities for pharmacogenomics: perspective of the Industry Pharmacogenomics Working Group (I-PWG).

    Bienfait, Karina / Chhibber, Aparna / Marshall, Jean-Claude / Armstrong, Martin / Cox, Charles / Shaw, Peter M / Paulding, Charles

    Human genetics

    2021  Volume 141, Issue 6, Page(s) 1165–1173

    Abstract: Pharmaceutical companies have increasingly utilized genomic data for the selection of drug targets and the development of precision medicine approaches. Most major pharmaceutical companies routinely collect DNA from clinical trial participants and ... ...

    Abstract Pharmaceutical companies have increasingly utilized genomic data for the selection of drug targets and the development of precision medicine approaches. Most major pharmaceutical companies routinely collect DNA from clinical trial participants and conduct pharmacogenomic (PGx) studies. However, the implementation of PGx studies during clinical development presents a number of challenges. These challenges include adapting to a constantly changing global regulatory environment, challenges in study design and clinical implementation, and the increasing concerns over patient privacy. Advances in the field of genomics are also providing new opportunities for pharmaceutical companies, including the availability of large genomic databases linked to patient health information, the growing use of polygenic risk scores, and the direct sequencing of clinical trial participants. The Industry Pharmacogenomics Working Group (I-PWG) is an association of pharmaceutical companies actively working in the field of pharmacogenomics. This I-PWG perspective will provide an overview of the steps pharmaceutical companies are taking to address each of these challenges, and the approaches being taken to capitalize on emerging scientific opportunities.
    MeSH term(s) DNA ; Genomics ; Humans ; Pharmaceutical Preparations ; Pharmacogenetics ; Precision Medicine
    Chemical Substances Pharmaceutical Preparations ; DNA (9007-49-2)
    Language English
    Publishing date 2021-06-03
    Publishing country Germany
    Document type Journal Article ; Review
    ZDB-ID 223009-4
    ISSN 1432-1203 ; 0340-6717
    ISSN (online) 1432-1203
    ISSN 0340-6717
    DOI 10.1007/s00439-021-02282-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Neutralization of SARS-CoV-2 Omicron BA.2.75 after mRNA-1273 Vaccination.

    Shen, Xiaoying / Chalkias, Spyros / Feng, Jing / Chen, Xing / Zhou, Honghong / Marshall, Jean-Claude / Girard, Bethany / Tomassini, Joanne E / Aunins, Anne / Das, Rituparna / Montefiori, David C

    The New England journal of medicine

    2022  Volume 387, Issue 13, Page(s) 1234–1236

    MeSH term(s) 2019-nCoV Vaccine mRNA-1273/immunology ; 2019-nCoV Vaccine mRNA-1273/therapeutic use ; Antibodies, Neutralizing/therapeutic use ; Antibodies, Viral ; COVID-19/immunology ; COVID-19/prevention & control ; COVID-19/virology ; Humans ; SARS-CoV-2/immunology ; Spike Glycoprotein, Coronavirus ; Vaccination
    Chemical Substances Antibodies, Neutralizing ; Antibodies, Viral ; Spike Glycoprotein, Coronavirus ; spike protein, SARS-CoV-2 ; 2019-nCoV Vaccine mRNA-1273 (EPK39PL4R4)
    Language English
    Publishing date 2022-09-09
    Publishing country United States
    Document type Letter
    ZDB-ID 207154-x
    ISSN 1533-4406 ; 0028-4793
    ISSN (online) 1533-4406
    ISSN 0028-4793
    DOI 10.1056/NEJMc2210648
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Bioanalysis of adeno-associated virus gene therapy therapeutics: regulatory expectations.

    Gorovits, Boris / Marshall, Jean-Claude / Smith, Justin / Whiteley, Laurence O / Neubert, Hendrik

    Bioanalysis

    2019  Volume 11, Issue 21, Page(s) 2011–2024

    Abstract: The number of gene therapy (GTx) modality therapies in development has grown significantly in the last few years. Adeno-associated virus (AAV)-based delivery approach has become most prevalent among other virus-based GTx vectors. Several regulatory ... ...

    Abstract The number of gene therapy (GTx) modality therapies in development has grown significantly in the last few years. Adeno-associated virus (AAV)-based delivery approach has become most prevalent among other virus-based GTx vectors. Several regulatory guidelines provide the industry with general considerations related to AAV GTx development including discussion and recommendations related to highly diverse bioanalytical support of the AAV-based therapeutics. This includes assessment of pre- and post-treatment immunity, evaluation of post-treatment viral shedding and infectivity, as well as detection of transgene protein expression. An overview of the current regulatory recommendations as found in currently active and published draft US FDA and EMA guidance or guideline documents is presented herein.
    MeSH term(s) Animals ; Dependovirus/genetics ; Genetic Therapy/adverse effects ; Genetic Therapy/legislation & jurisprudence ; Genome, Viral/genetics ; Humans ; Immunity/genetics ; Social Control, Formal
    Language English
    Publishing date 2019-10-25
    Publishing country England
    Document type Journal Article ; Review
    ISSN 1757-6199
    ISSN (online) 1757-6199
    DOI 10.4155/bio-2019-0135
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Assessment of inter-racial variability in CYP3A4 activity and inducibility among healthy adult males of Caucasian and South Asian ancestries.

    van Dyk, Madelé / Marshall, Jean-Claude / Sorich, Michael J / Wood, Linda S / Rowland, Andrew

    European journal of clinical pharmacology

    2018  Volume 74, Issue 7, Page(s) 913–920

    Abstract: Purpose: Cytochrome P450 (CYP) 3A4 is responsible for the metabolism of more than 30% of clinically used drugs. Inherent between subject variability in clearance of CYP3A4 substrates is substantial; by way of example, midazolam clearance varies by > 10- ... ...

    Abstract Purpose: Cytochrome P450 (CYP) 3A4 is responsible for the metabolism of more than 30% of clinically used drugs. Inherent between subject variability in clearance of CYP3A4 substrates is substantial; by way of example, midazolam clearance varies by > 10-fold between individuals before considering the impact of extrinsic factors. Relatively little is known about inter-racial variability in the activity of this enzyme.
    Methods: This study assessed inter-racial variability in midazolam exposure in a cohort (n = 30) of CYP3A genotyped, age-matched healthy males of Caucasian and South Asian ancestries. Midazolam exposure was assessed at baseline, following 7 days of rifampicin and following 3 days of clarithromycin.
    Results: The geometric mean baseline midazolam area under the plasma concentration curve (AUC
    Conclusions: Significantly higher midazolam clearance was observed in healthy age-matched males of South Asian compared to Caucasian ancestry that was not explained by differences in the frequency of CYP3A genotypes.
    MeSH term(s) Adult ; Area Under Curve ; Asian Continental Ancestry Group/genetics ; Clarithromycin/blood ; Clarithromycin/pharmacokinetics ; Clarithromycin/pharmacology ; Continental Population Groups ; Cytochrome P-450 CYP3A/genetics ; Cytochrome P-450 CYP3A/metabolism ; Cytochrome P-450 CYP3A Inducers/blood ; Cytochrome P-450 CYP3A Inducers/pharmacokinetics ; Cytochrome P-450 CYP3A Inducers/pharmacology ; Cytochrome P-450 CYP3A Inhibitors/blood ; Cytochrome P-450 CYP3A Inhibitors/pharmacokinetics ; Cytochrome P-450 CYP3A Inhibitors/pharmacology ; Enzyme Induction ; European Continental Ancestry Group/genetics ; Genotype ; Humans ; Male ; Midazolam/blood ; Midazolam/pharmacokinetics ; Rifampin/blood ; Rifampin/pharmacokinetics ; Rifampin/pharmacology ; Young Adult
    Chemical Substances Cytochrome P-450 CYP3A Inducers ; Cytochrome P-450 CYP3A Inhibitors ; Cytochrome P-450 CYP3A (EC 1.14.14.1) ; CYP3A4 protein, human (EC 1.14.14.55) ; Clarithromycin (H1250JIK0A) ; Midazolam (R60L0SM5BC) ; Rifampin (VJT6J7R4TR)
    Language English
    Publishing date 2018-03-23
    Publishing country Germany
    Document type Clinical Trial ; Journal Article
    ZDB-ID 121960-1
    ISSN 1432-1041 ; 0031-6970
    ISSN (online) 1432-1041
    ISSN 0031-6970
    DOI 10.1007/s00228-018-2450-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Use of Physiologically Based Pharmacokinetic Modeling to Identify Physiological and Molecular Characteristics Driving Variability in Axitinib Exposure: A Fresh Approach to Precision Dosing in Oncology.

    Sorich, Michael J / Mutlib, Fayzah / van Dyk, Madelé / Hopkins, Ashley M / Polasek, Thomas M / Marshall, Jean-Claude / Rodrigues, A David / Rowland, Andrew

    Journal of clinical pharmacology

    2019  Volume 59, Issue 6, Page(s) 872–879

    Abstract: Axitinib is a second-generation small-molecule vascular endothelial growth factor receptor inhibitor. An axitinib steady-state area under the plasma concentration-time curve ( ... ...

    Abstract Axitinib is a second-generation small-molecule vascular endothelial growth factor receptor inhibitor. An axitinib steady-state area under the plasma concentration-time curve (AUC
    MeSH term(s) Albumins/metabolism ; Axitinib/pharmacokinetics ; Biological Variation, Population/drug effects ; Biomarkers ; Biomarkers, Pharmacological ; Cytochrome P-450 CYP3A/metabolism ; Drug Dosage Calculations ; Humans ; Linear Models ; Models, Biological ; Neoplasms/drug therapy ; Receptors, Vascular Endothelial Growth Factor/antagonists & inhibitors
    Chemical Substances Albumins ; Biomarkers ; Biomarkers, Pharmacological ; Axitinib (C9LVQ0YUXG) ; Cytochrome P-450 CYP3A (EC 1.14.14.1) ; Receptors, Vascular Endothelial Growth Factor (EC 2.7.10.1)
    Language English
    Publishing date 2019-01-11
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 188980-1
    ISSN 1552-4604 ; 0091-2700 ; 0021-9754
    ISSN (online) 1552-4604
    ISSN 0091-2700 ; 0021-9754
    DOI 10.1002/jcph.1377
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Meta-Analysis of Noncompartmental Pharmacokinetic Parameters of Ertugliflozin to Evaluate Dose Proportionality and UGT1A9 Polymorphism Effect on Exposure.

    Marshall, Jean-Claude / Liang, Yali / Sahasrabudhe, Vaishali / Tensfeldt, Thomas / Fediuk, Daryl J / Zhou, Susan / Krishna, Rajesh / Dawra, Vikas Kumar / Wood, Linda S / Sweeney, Kevin

    Journal of clinical pharmacology

    2021  Volume 61, Issue 9, Page(s) 1220–1231

    Abstract: Ertugliflozin, a sodium-glucose cotransporter 2 inhibitor, is primarily metabolized via glucuronidation by the uridine 5'-diphospho-glucuronosyltransferase (UGT) isoform UGT1A9. This noncompartmental meta-analysis of ertugliflozin pharmacokinetics ... ...

    Abstract Ertugliflozin, a sodium-glucose cotransporter 2 inhibitor, is primarily metabolized via glucuronidation by the uridine 5'-diphospho-glucuronosyltransferase (UGT) isoform UGT1A9. This noncompartmental meta-analysis of ertugliflozin pharmacokinetics evaluated the relationship between ertugliflozin exposure and dose, and the effect of UGT1A9 genotype on ertugliflozin exposure. Pharmacokinetic data from 25 phase 1 studies were pooled. Structural models for dose proportionality described the relationship between ertugliflozin area under the plasma concentration-time curve (AUC) or maximum observed plasma concentration (C
    MeSH term(s) Area Under Curve ; Bridged Bicyclo Compounds, Heterocyclic/administration & dosage ; Bridged Bicyclo Compounds, Heterocyclic/pharmacokinetics ; Clinical Trials, Phase I as Topic ; Dose-Response Relationship, Drug ; Genotype ; Glucuronosyltransferase/genetics ; Humans ; Metabolic Clearance Rate ; Models, Biological ; Polymorphism, Genetic ; Sodium-Glucose Transporter 2 Inhibitors/administration & dosage ; Sodium-Glucose Transporter 2 Inhibitors/pharmacokinetics ; UDP-Glucuronosyltransferase 1A9/genetics
    Chemical Substances Bridged Bicyclo Compounds, Heterocyclic ; Sodium-Glucose Transporter 2 Inhibitors ; ertugliflozin (6C282481IP) ; Glucuronosyltransferase (EC 2.4.1.17) ; UDP-Glucuronosyltransferase 1A9 (EC 2.4.1.17)
    Language English
    Publishing date 2021-06-19
    Publishing country England
    Document type Journal Article ; Meta-Analysis ; Research Support, Non-U.S. Gov't
    ZDB-ID 188980-1
    ISSN 1552-4604 ; 0091-2700 ; 0021-9754
    ISSN (online) 1552-4604
    ISSN 0091-2700 ; 0021-9754
    DOI 10.1002/jcph.1866
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Identification of the caffeine to trimethyluric acid ratio as a dietary biomarker to characterise variability in cytochrome P450 3A activity.

    van Dyk, Madelé / Miners, John O / Marshall, Jean-Claude / Wood, Linda S / Hopkins, Ashley / Sorich, Michael J / Rowland, Andrew

    European journal of clinical pharmacology

    2019  Volume 75, Issue 9, Page(s) 1211–1218

    Abstract: Purpose: Cytochrome P450 (CYP) 3A plays an important role in the metabolism of many clinically used drugs and exhibits substantial between-subject variability (BSV) in activity. Current methods to assess variability in CYP3A activity have limitations ... ...

    Abstract Purpose: Cytochrome P450 (CYP) 3A plays an important role in the metabolism of many clinically used drugs and exhibits substantial between-subject variability (BSV) in activity. Current methods to assess variability in CYP3A activity have limitations and there remains a need for a minimally invasive clinically translatable strategy to define CYP3A activity. The purpose of this study was to evaluate the potential for a caffeine metabolic ratio to describe variability in CYP3A activity.
    Methods: The metabolic ratio 1,3,7-trimethyluric acid (TMU) to caffeine was evaluated as a biomarker to describe variability in CYP3A activity in a cohort (n = 28) of healthy 21 to 35-year-old males. Midazolam, caffeine, and TMU concentrations were assessed at baseline and following dosing of rifampicin (300 mg daily) for 7 days.
    Results: At baseline, correlation coefficients for the relationship between apparent oral midazolam clearance (CL/F) with caffeine/TMU ratio measured at 3, 4, and 6 h post dose were 0.82, 0.79, and 0.65, respectively. The strength of correlations was retained post rifampicin dosing; 0.72, 0.87, and 0.82 for the ratios at 3, 4, and 6 h, respectively. Weaker correlations were observed between the change in midazolam CL/F and change in caffeine/TMU ratio post/pre-rifampicin dosing.
    Conclusion: BSV in CYP3A activity was well described by caffeine/TMU ratios pre- and post-induction. The caffeine/TMU ratio may be a convenient tool to assess BSV in CYP3A activity, but assessment of caffeine/TMU ratio alone is unlikely to account for all sources of variability in CYP3A activity.
    MeSH term(s) Adult ; Biomarkers/blood ; Caffeine/blood ; Caffeine/pharmacokinetics ; Continental Population Groups/genetics ; Cytochrome P-450 CYP3A/genetics ; Cytochrome P-450 CYP3A/metabolism ; Cytochrome P-450 CYP3A Inducers/blood ; Cytochrome P-450 CYP3A Inducers/pharmacokinetics ; Diet ; Genotype ; Humans ; Male ; Midazolam/blood ; Midazolam/pharmacokinetics ; Phenotype ; Rifampin/blood ; Rifampin/pharmacokinetics ; Uric Acid/analogs & derivatives ; Uric Acid/blood ; Young Adult
    Chemical Substances Biomarkers ; Cytochrome P-450 CYP3A Inducers ; Uric Acid (268B43MJ25) ; Caffeine (3G6A5W338E) ; 1,3,7-trimethyluric acid (5415-44-1) ; CYP3A protein, human (EC 1.14.14.1) ; Cytochrome P-450 CYP3A (EC 1.14.14.1) ; Midazolam (R60L0SM5BC) ; Rifampin (VJT6J7R4TR)
    Language English
    Publishing date 2019-05-23
    Publishing country Germany
    Document type Clinical Trial ; Journal Article
    ZDB-ID 121960-1
    ISSN 1432-1041 ; 0031-6970
    ISSN (online) 1432-1041
    ISSN 0031-6970
    DOI 10.1007/s00228-019-02682-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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