Optimization of blood sampling time for isolation of antigen binding single-domain antibodies from immunized llamas

IF 1.6 4区 医学 Q4 BIOCHEMICAL RESEARCH METHODS Journal of immunological methods Pub Date : 2025-04-01 Epub Date: 2025-03-04 DOI:10.1016/j.jim.2025.113844
Michiel M. Harmsen, Frank Harders, Sandra van de Water, Conny S. van Solt, Ad P. Koets, Fimme J. van der Wal, Nishi Gupta
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Abstract

Single-domain antibody fragments (VHHs) binding specific antigens are often isolated by llama immunization and phage display selection. We determined the optimal blood sampling time for generating phage display libraries with a high frequency of antigen-binding VHHs. Two llamas were immunized with 7 antigens. Blood samples collected with 2–3 day interval up to 11 days post immunization were used for deep sequencing and phage display selection of VHHs. The frequency of VHH clones was determined by the identification of unique VHH sequences in deep sequenced libraries. On average, the highest clone frequency was found in libraries generated 5 days post immunization. Polyclonal phage ELISA also suggested day 5 as the optimal blood sampling time.
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免疫大羊驼抗原结合单域抗体采血时间的优化
结合特异性抗原的单域抗体片段(VHHs)常通过羊驼免疫和噬菌体展示选择分离得到。我们确定了产生高频抗原结合vhh噬菌体展示文库的最佳采血时间。用7种抗原对2只大羊驼进行免疫。免疫后2-3天至11天采集血样,用于vhh的深度测序和噬菌体展示选择。通过在深度测序文库中鉴定独特的VHH序列来确定VHH克隆的频率。平均而言,免疫后5天产生的文库克隆频率最高。多克隆噬菌体ELISA也提示第5天为最佳采血时间。
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来源期刊
CiteScore
4.10
自引率
0.00%
发文量
120
审稿时长
3 months
期刊介绍: The Journal of Immunological Methods is devoted to covering techniques for: (1) Quantitating and detecting antibodies and/or antigens. (2) Purifying immunoglobulins, lymphokines and other molecules of the immune system. (3) Isolating antigens and other substances important in immunological processes. (4) Labelling antigens and antibodies. (5) Localizing antigens and/or antibodies in tissues and cells. (6) Detecting, and fractionating immunocompetent cells. (7) Assaying for cellular immunity. (8) Documenting cell-cell interactions. (9) Initiating immunity and unresponsiveness. (10) Transplanting tissues. (11) Studying items closely related to immunity such as complement, reticuloendothelial system and others. (12) Molecular techniques for studying immune cells and their receptors. (13) Imaging of the immune system. (14) Methods for production or their fragments in eukaryotic and prokaryotic cells. In addition the journal will publish articles on novel methods for analysing the organization, structure and expression of genes for immunologically important molecules such as immunoglobulins, T cell receptors and accessory molecules involved in antigen recognition, processing and presentation. Submitted full length manuscripts should describe new methods of broad applicability to immunology and not simply the application of an established method to a particular substance - although papers describing such applications may be considered for publication as a short Technical Note. Review articles will also be published by the Journal of Immunological Methods. In general these manuscripts are by solicitation however anyone interested in submitting a review can contact the Reviews Editor and provide an outline of the proposed review.
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