Chem. J. Chinese Universities ›› 2025, Vol. 46 ›› Issue (12): 20250231.doi: 10.7503/cjcu20250231

• Polymer Chemistry • Previous Articles     Next Articles

Kinetic Monte Carlo Simulation of the Gelation Regions of Semi-batch Nonequal Reactive Antibody-Antigen Systems

ZHANG Ziru1, LI Jiangtao1, GU Fang1(), WANG Haijun1,2,3()   

  1. 1.College of Chemistry and Material Science
    2.Chemical Biology Key Laboratory of Hebei Province
    3.Key Laboratory of Medicinal Chemistry and Molecular Diagnosis,Ministry of Education,Hebei University,Baoding 071002,China
  • Received:2025-08-21 Online:2025-12-10 Published:2025-11-04
  • Contact: GU Fang, WANG Haijun E-mail:fanggu@hbu.edu.cn;whj@hbu.edu.cn
  • Supported by:
    the Central Guidance on Local Science and Technology Development Fund of Hebei Province, China(236Z7601G);the Interdisciplinary Research Program of Natural Science of Hebei University, China(DXK202112)

Abstract:

A kinetic Monte Carlo simulation is performed to investigate the gelation regions for the antibody-antigen system of [Ag]3-[Ab]2 type, involving the semi-batch and nonequal reactivity. Specifically, the gelation regions consisting of critical and maximum conversions for various molar ratios of epitopes to paratopes are presented. Furthermore, the increments of critical conversions between two successive feedings are obtained to determine the equivalent zone, which ranges from 1 to 1.5 for the present system. It is shown that when the growth of antibody- antigen complexes of larger sizes takes priority, the smallest variance in the increments of critical conversions can be found. These results signify that the agglutination reactions under the semi-batch mode can be employed to the quantitative analysis of the immune responses. Conversely, if the growth of complexes of small sizes dominates in the system, then the corresponding agglutination reactions are only suitable for qualitative immunoassay. An attempt was made to elucidate the impacts of relevant factors on the gelation process of the system, thereby providing useful clues for a quantitative immunoassay and relevant targeted drug therapies.

Key words: Antibody-antigen complex, Gelation region, Semi-batch, Nonequal reactivity, Kinetic Monte Carlo simulation

CLC Number: 

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