LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 98

Search options

  1. Article ; Online: Modulation of the Fibrillation Kinetics and Morphology of a Therapeutic Peptide by Cucurbit[7]uril.

    Martinez Morales, Marcello / van der Walle, Christopher F / Derrick, Jeremy P

    Molecular pharmaceutics

    2023  Volume 20, Issue 7, Page(s) 3559–3569

    Abstract: Fibrillation is a challenge commonly encountered in the formulation and development of therapeutic peptides. Cucurbit[7]urils (CB[7]), a group of water soluble macrocycles, have been reported to suppress fibrillation in insulin and human calcitonin ... ...

    Abstract Fibrillation is a challenge commonly encountered in the formulation and development of therapeutic peptides. Cucurbit[7]urils (CB[7]), a group of water soluble macrocycles, have been reported to suppress fibrillation in insulin and human calcitonin through association with Phe and Tyr residues which drive fibril formation. Here, we report the effect of CB[7] on the fibrillation behavior of the HIV fusion inhibitor enfuvirtide (ENF) that contains N-terminal Tyr and C-terminal Phe residues. Thioflavin T fluorescence, CD spectroscopy, and transmission electron microscopy were used to monitor fibrillation behavior. Fibrillation onset showed a strong pH dependency, with pH 6.5 identified as the condition most suitable to monitor the effects of CB[7]. Binding of CB[7] to wild-type ENF was measured by isothermal titration calorimetry and was consistent with a single site (
    MeSH term(s) Humans ; Bridged-Ring Compounds/pharmacology ; Bridged-Ring Compounds/chemistry ; Kinetics ; Peptides ; Macrocyclic Compounds/chemistry
    Chemical Substances cucurbit(7)uril ; Bridged-Ring Compounds ; Peptides ; Macrocyclic Compounds
    Language English
    Publishing date 2023-06-16
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2138405-8
    ISSN 1543-8392 ; 1543-8384
    ISSN (online) 1543-8392
    ISSN 1543-8384
    DOI 10.1021/acs.molpharmaceut.3c00185
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Beyond the usual suspects: Reviewing infections caused by typically-commensal Neisseria species.

    Walsh, Lloyd / Clark, Stephen A / Derrick, Jeremy P / Borrow, Ray

    The Journal of infection

    2023  Volume 87, Issue 6, Page(s) 479–489

    Abstract: Objective: Few data outside of individual case reports are available on non-meningococcal, non-gonococcal species of Neisseria as causative agents of invasive disease. This review collates disease, organism and patient information from case reports on ... ...

    Abstract Objective: Few data outside of individual case reports are available on non-meningococcal, non-gonococcal species of Neisseria as causative agents of invasive disease. This review collates disease, organism and patient information from case reports on the topic.
    Methods: A literature search was performed examining articles describing diseases caused by non-meningococcal and non-gonococcal Neisseria.
    Findings: Neisseria present as opportunistic pathogens causing a wide variety of diseases including serious presentations, endocarditis being the most common condition described and N. mucosa the most commonly presenting pathogen overall. Disease may occur in otherwise healthy patients, although risk factors for infection include recent surgery, an immunocompromised state, poor oral health, and intravenous drug use.
    Conclusions: Commensal Neisseria infections are rare but can present serious invasive diseases. Further research is required to determine why some species cause disease more than others or why some are inclined towards particular manifestations.
    MeSH term(s) Humans ; Neisseria ; Endocarditis ; Symbiosis ; Immunocompromised Host ; Neisseria meningitidis
    Language English
    Publishing date 2023-10-04
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 424417-5
    ISSN 1532-2742 ; 0163-4453
    ISSN (online) 1532-2742
    ISSN 0163-4453
    DOI 10.1016/j.jinf.2023.09.007
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Editorial: Understanding and Engineering Antibody-Superantigen Interactions.

    Gan, Samuel Ken-En / Derrick, Jeremy P / Fraternali, Franca

    Frontiers in immunology

    2022  Volume 13, Page(s) 857339

    Language English
    Publishing date 2022-02-09
    Publishing country Switzerland
    Document type Editorial ; Introductory Journal Article
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2022.857339
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Superantigen Recognition and Interactions: Functions, Mechanisms and Applications.

    Deacy, Anthony M / Gan, Samuel Ken-En / Derrick, Jeremy P

    Frontiers in immunology

    2021  Volume 12, Page(s) 731845

    Abstract: Superantigens are unconventional antigens which recognise immune receptors outside their usual recognition sites e.g. complementary determining regions (CDRs), to elicit a response within the target cell. T-cell superantigens crosslink T-cell receptors ... ...

    Abstract Superantigens are unconventional antigens which recognise immune receptors outside their usual recognition sites e.g. complementary determining regions (CDRs), to elicit a response within the target cell. T-cell superantigens crosslink T-cell receptors and MHC Class II molecules on antigen-presenting cells, leading to lymphocyte recruitment, induction of cytokine storms and T-cell anergy or apoptosis among many other effects. B-cell superantigens, on the other hand, bind immunoglobulins on B-cells, affecting opsonisation, IgG-mediated phagocytosis, and driving apoptosis. Here, through a review of the structural basis for recognition of immune receptors by superantigens, we show that their binding interfaces share specific physicochemical characteristics when compared with other protein-protein interaction complexes. Given that antibody-binding superantigens have been exploited extensively in industrial antibody purification, these observations could facilitate further protein engineering to optimize the use of superantigens in this and other areas of biotechnology.
    MeSH term(s) Animals ; Antibodies/isolation & purification ; Antigen-Presenting Cells/immunology ; Antigen-Presenting Cells/metabolism ; Apoptosis ; B-Lymphocytes/immunology ; B-Lymphocytes/metabolism ; B-Lymphocytes/pathology ; Clonal Anergy ; Cytokine Release Syndrome/immunology ; Cytokine Release Syndrome/metabolism ; Histocompatibility Antigens Class II/immunology ; Histocompatibility Antigens Class II/metabolism ; Humans ; Immunoglobulin Fragments/immunology ; Immunoglobulin Fragments/metabolism ; Lymphocyte Activation ; Protein Engineering ; Receptors, Antigen, T-Cell/immunology ; Receptors, Antigen, T-Cell/metabolism ; Signal Transduction ; Superantigens/immunology ; Superantigens/metabolism ; T-Lymphocytes/immunology ; T-Lymphocytes/metabolism ; T-Lymphocytes/pathology
    Chemical Substances Antibodies ; Histocompatibility Antigens Class II ; Immunoglobulin Fragments ; Receptors, Antigen, T-Cell ; Superantigens
    Language English
    Publishing date 2021-09-20
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2021.731845
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Structural Evaluation of the Spike Glycoprotein Variants on SARS-CoV-2 Transmission and Immune Evasion.

    Salleh, Mohd Zulkifli / Derrick, Jeremy P / Deris, Zakuan Zainy

    International journal of molecular sciences

    2021  Volume 22, Issue 14

    Abstract: The emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) presents significant social, economic and political challenges worldwide. SARS-CoV-2 has caused over 3.5 million deaths since late 2019. Mutations in the spike (S) glycoprotein ...

    Abstract The emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) presents significant social, economic and political challenges worldwide. SARS-CoV-2 has caused over 3.5 million deaths since late 2019. Mutations in the spike (S) glycoprotein are of particular concern because it harbours the domain which recognises the angiotensin-converting enzyme 2 (ACE2) receptor and is the target for neutralising antibodies. Mutations in the S protein may induce alterations in the surface spike structures, changing the conformational B-cell epitopes and leading to a potential reduction in vaccine efficacy. Here, we summarise how the more important variants of SARS-CoV-2, which include cluster 5, lineages B.1.1.7 (Alpha variant), B.1.351 (Beta), P.1 (B.1.1.28/Gamma), B.1.427/B.1.429 (Epsilon), B.1.526 (Iota) and B.1.617.2 (Delta) confer mutations in their respective spike proteins which enhance viral fitness by improving binding affinity to the ACE2 receptor and lead to an increase in infectivity and transmission. We further discuss how these spike protein mutations provide resistance against immune responses, either acquired naturally or induced by vaccination. This information will be valuable in guiding the development of vaccines and other therapeutics for protection against the ongoing coronavirus disease 2019 (COVID-19) pandemic.
    MeSH term(s) Angiotensin-Converting Enzyme 2/genetics ; Angiotensin-Converting Enzyme 2/metabolism ; Antibodies, Neutralizing/immunology ; COVID-19/genetics ; COVID-19/immunology ; COVID-19/transmission ; COVID-19/virology ; Epitopes, B-Lymphocyte/immunology ; Humans ; Immune Evasion ; Mutation ; SARS-CoV-2/chemistry ; SARS-CoV-2/immunology ; SARS-CoV-2/metabolism ; SARS-CoV-2/physiology ; Spike Glycoprotein, Coronavirus/chemistry ; Spike Glycoprotein, Coronavirus/genetics ; Spike Glycoprotein, Coronavirus/immunology ; Spike Glycoprotein, Coronavirus/metabolism
    Chemical Substances Antibodies, Neutralizing ; Epitopes, B-Lymphocyte ; Spike Glycoprotein, Coronavirus ; spike protein, SARS-CoV-2 ; ACE2 protein, human (EC 3.4.17.23) ; Angiotensin-Converting Enzyme 2 (EC 3.4.17.23)
    Language English
    Publishing date 2021-07-10
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms22147425
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Adaptation of an ELISA assay for detection of IgG

    Rane, Shraddha S / Dearman, Rebecca J / Kimber, Ian / Derrick, Jeremy P

    Journal of immunotoxicology

    2022  Volume 19, Issue 1, Page(s) 1–7

    Abstract: Biotherapeutic monoclonal antibodies (mAb) play important roles in clinical medicine but their potential to elicit immune responses in patients remains a major issue. In a study designed to investigate the effect of aggregation on immunogenic responses, ... ...

    Abstract Biotherapeutic monoclonal antibodies (mAb) play important roles in clinical medicine but their potential to elicit immune responses in patients remains a major issue. In a study designed to investigate the effect of aggregation on immunogenic responses, mice were immunized with two monoclonal antibodies (mAb1 and mAb2). Serum levels of total IgG, IgG
    MeSH term(s) Animals ; Antibodies, Monoclonal ; Antibody Formation ; Enzyme-Linked Immunosorbent Assay ; Humans ; Immunization ; Immunoglobulin G ; Mice ; Mice, Inbred BALB C
    Chemical Substances Antibodies, Monoclonal ; Immunoglobulin G
    Language English
    Publishing date 2022-01-22
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2205064-4
    ISSN 1547-6901 ; 1547-691X
    ISSN (online) 1547-6901
    ISSN 1547-691X
    DOI 10.1080/1547691X.2021.2020937
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Use of Peptide Microarrays for Fast and Informative Profiling of Therapeutic Antibody Formulation Conditions.

    Austerberry, James / Edwards, John / Eyes, Tim / Derrick, Jeremy P

    Molecular pharmaceutics

    2021  Volume 18, Issue 11, Page(s) 4131–4139

    Abstract: Methods to optimize the solution behavior of therapeutic proteins are frequently time-consuming, provide limited information, and often use milligram quantities of material. Here, we present a simple, versatile method that provides valuable information ... ...

    Abstract Methods to optimize the solution behavior of therapeutic proteins are frequently time-consuming, provide limited information, and often use milligram quantities of material. Here, we present a simple, versatile method that provides valuable information to guide the identification and comparison of formulation conditions for, in principle, any biopharmaceutical drug. The subject protein is incubated with a designed synthetic peptide microarray; the extent of binding to each peptide is dependent on the solution conditions. The array is washed, and the adhesion of the subject protein is detected using a secondary antibody. We exemplify the method using a well-characterized human single-chain Fv and a selection of human monoclonal antibodies. Correlations of peptide adhesion profiles can be used to establish quantitative relationships between different solution conditions, allowing subgrouping into dendrograms. Multidimensional reduction methods, such as t-distributed stochastic neighbor embedding, can be applied to compare how different monoclonals vary in their adhesion properties under different solution conditions. Finally, we screened peptide binding profiles using a selection of monoclonal antibodies for which a range of biophysical measurements were available under specified buffer conditions. We used a neural network method to train the data against aggregation temperature,
    MeSH term(s) Antibodies, Monoclonal/chemistry ; Antibodies, Monoclonal/therapeutic use ; Biological Products/chemistry ; Biological Products/therapeutic use ; Chemistry, Pharmaceutical/methods ; Humans ; Machine Learning ; Peptides/chemistry ; Protein Array Analysis/methods ; Protein Stability ; Single-Chain Antibodies/chemistry ; Single-Chain Antibodies/therapeutic use
    Chemical Substances Antibodies, Monoclonal ; Biological Products ; Peptides ; Single-Chain Antibodies
    Language English
    Publishing date 2021-10-18
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2138405-8
    ISSN 1543-8392 ; 1543-8384
    ISSN (online) 1543-8392
    ISSN 1543-8384
    DOI 10.1021/acs.molpharmaceut.1c00543
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Adverse immunological responses against non-viral nanoparticle (NP) delivery systems in the lung.

    de Braganca, Leonor / Ferguson, G John / Luis Santos, Jose / Derrick, Jeremy P

    Journal of immunotoxicology

    2021  Volume 18, Issue 1, Page(s) 61–73

    Abstract: There is a large, unmet medical need to treat chronic obstructive pulmonary disease, asthma, idiopathic pulmonary fibrosis and other respiratory diseases. New modalities are being developed, including gene therapy which treats the disease at the DNA/RNA ... ...

    Abstract There is a large, unmet medical need to treat chronic obstructive pulmonary disease, asthma, idiopathic pulmonary fibrosis and other respiratory diseases. New modalities are being developed, including gene therapy which treats the disease at the DNA/RNA level. Despite recent innovations in non-viral gene therapy delivery for chronic respiratory diseases, unwanted or adverse interactions with immune cells, particularly macrophages, can limit drug efficacy. This review will examine the relationship between the design and fabrication of non-viral nucleic acid nanoparticle (NP) delivery systems and their ability to trigger unwanted immunogenic responses in lung tissues. NP formulated with peptides, lipids, synthetic and natural polymers provide a robust means of delivering the genetic cargos to the desired cells. However NP, or their components, may trigger local responses such as cell damage, edema, inflammation, and complement activation. These effects may be acute short-term reactions or chronic long-term effects like fibrosis, increased susceptibility to diseases, autoimmune disorders, and even cancer. This review examines the relationship between physicochemical properties, i.e. shape, charge, hydrophobicity, composition and stiffness, and interactions of NP with pulmonary immune cells. Inhalation is the ideal route of administration for direct delivery but inhaled NP encounter innate immune cells, such as alveolar macrophages (AM) and dendritic cells (DC), that perceive them as harmful foreign material, interfere with gene delivery to target cells, and can induce undesirable side effects. Recommendations for fabrication and formulation of gene therapies to avoid adverse immunological responses are given. These include fine tuning physicochemical properties, functionalization of the surface of NP to actively target diseased pulmonary cells and employing biomimetics to increase immunotolerance.
    MeSH term(s) Administration, Inhalation ; Drug Delivery Systems ; Lung ; Macrophages, Alveolar ; Nanoparticles
    Language English
    Publishing date 2021-04-16
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2205064-4
    ISSN 1547-6901 ; 1547-691X
    ISSN (online) 1547-6901
    ISSN 1547-691X
    DOI 10.1080/1547691X.2021.1902432
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Genome-wide association studies identify an association of transferrin binding protein B variation and invasive serogroup Y meningococcal disease in older adults.

    Maynard-Smith, Laura / Derrick, Jeremy P / Borrow, Ray / Lucidarme, Jay / Maiden, Martin C J / Heyderman, Robert S / Harrison, Odile B

    The Journal of infectious diseases

    2022  

    Abstract: Background: Neisseria meningitidis serogroup Y, especially ST-23 clonal complex (Y:cc23), represents a larger proportion of invasive meningococcal disease (IMD) in older adults compared to younger individuals. This study explored the meningococcal ... ...

    Abstract Background: Neisseria meningitidis serogroup Y, especially ST-23 clonal complex (Y:cc23), represents a larger proportion of invasive meningococcal disease (IMD) in older adults compared to younger individuals. This study explored the meningococcal genetic variation underlying this association.
    Methods: Maximum-likelihood phylogenies and the pangenome were analysed using whole genome sequence (WGS) data from 200 Y:cc23 isolates in the Neisseria PubMLST database. Genome-wide association studies (GWAS) were performed on WGS data from 250 Y:cc23 isolates from individuals with IMD aged ≥65 years versus < 65 years.
    Results: Y:cc23 meningococcal variants did not cluster by age-group or disease phenotype in phylogenetic analyses. Pangenome comparisons found no differences in presence or absence of genes in IMD isolates from the different age groups. GWAS identified differences in nucleotide polymorphisms within the transferrin-binding protein B (tbpB) gene in isolates from individuals ≥65 years of age. TbpB structure modelling suggests these may impact binding of human transferrin.
    Conclusion: These data suggest differential iron scavenging capacity amongst Y:cc23 meningococci isolated from older compared to younger patients. Iron acquisition is essential for many bacterial pathogens including the meningococcus. These polymorphisms may facilitate colonisation, thereby increasing the risk of disease in vulnerable older people with altered nasopharyngeal microbiomes and nutritional status.
    Language English
    Publishing date 2022-11-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3019-3
    ISSN 1537-6613 ; 0022-1899
    ISSN (online) 1537-6613
    ISSN 0022-1899
    DOI 10.1093/infdis/jiac430
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article: Application of a Neisseria meningitidis antigen microarray to identify candidate vaccine proteins from a human Phase I clinical trial

    Chang, Chun-Mien / Awanye, Amaka M. / Marsay, Leanne / Dold, Christina / Pollard, Andrew J. / Rollier, Christine S. / Feavers, Ian M. / Maiden, Martin C.J. / Derrick, Jeremy P.

    Vaccine. 2022 May 09,

    2022  

    Abstract: Meningococcal meningitis is a rare but serious condition affecting mainly children and young adults. Outer membrane vesicles (OMV) from Neisseria meningitidis have been used successfully as vaccines against the disease, although they only provide ... ...

    Abstract Meningococcal meningitis is a rare but serious condition affecting mainly children and young adults. Outer membrane vesicles (OMV) from Neisseria meningitidis have been used successfully as vaccines against the disease, although they only provide protection against a limited number of the many existing variants. There have been many attempts to identify suitable protein antigens for use in defined vaccines that provide broad protection against the disease, such as that leading to the development of the four component 4CMenB vaccine. We previously reported the use of a protein antigen microarray to screen for IgG antibodies in sera derived from human recipients of an OMV-based vaccine, as part of a Phase I clinical trial. Here, we show that computational methods can be used to cluster antigens that elicit similar responses in the same individuals. Fitting of IgG antibody binding data to 4,005 linear regressions identified pairs of antigens that exhibited significant correlations. Some were from the same antigens in different quaternary states, whilst others might be correlated for functional or immunological reasons. We also conducted statistical analyses to examine correlations between individual serum bactericidal antibody (SBA) titres and IgG reactivity against specific antigens. Both Kendall’s tau and Spearman’s rank correlation coefficient statistics identified specific antigens that correlated with log(SBA) titre in five different isolates. The principal antigens identified were PorA and PorB, RmpM, OpcA, and the type IV pilus assembly secretin, PilQ. Other minor antigens identified included a lipoprotein, two proteins from the BAM complex and the efflux channel MtrE. Our results suggest that consideration of the entire antigen composition, and allowance for potential interaction between antigens, could be valuable in designing future meningococcal vaccines. Such an approach has the advantages that it uses data derived from human, rather than animal, immunization and that it avoids the need to screen individual antigens.
    Keywords Neisseria meningitidis ; antibodies ; antigens ; blood serum ; clinical trials ; fimbriae ; humans ; immunization ; lipoproteins ; meningitis ; microarray technology ; secretin ; vaccines
    Language English
    Dates of publication 2022-0509
    Publishing place Elsevier Ltd
    Document type Article
    Note Pre-press version
    ZDB-ID 605674-x
    ISSN 1873-2518 ; 0264-410X
    ISSN (online) 1873-2518
    ISSN 0264-410X
    DOI 10.1016/j.vaccine.2022.05.032
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

To top