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<p>Interleukin-2-inducible T-cell kinase (ITK) is an essential enzyme that plays a key role in both the activation and differentiation of T-cells. As a member of the Tec family of non-receptor tyrosine kinases, ITK is predominantly expressed in T cells, exerting a critical influence on T-cell receptor signaling and downstream pathways. Moreover, ITK regulates cytokine production, notably interleukin-2 (IL-2), and the differentiation of Th2 cells. In the context of immunology, ITK has garnered significant attention, particularly for its potential to address immune-related conditions such as cancer and autoimmune diseases, including lymphoproliferative diseases. In this study, we performed a structure-based virtual screening utilizing a library of plant-based small molecules to identify inhibitors of ITK. The initial selection of phytochemicals was guided by adherence to the Lipinski rule of five. After molecular docking, top-ranked hits in terms of binding affinity underwent screening for physicochemical and pharmacokinetic properties and PASS analyses. The three selected phytochemicals, Withanolide A, Amorphispironon E, and 27-Deoxy-14-hydroxywithaferin A (27-DHA) demonstrated remarkable binding affinity to ITK with a docking score of −&#xa0;9.2, −&#xa0;9.1, and −&#xa0;9.1&#xa0;kcal/mol, respectively. All the phytochemicals showed specific binding to the ATP-binding site of ITK as revealed by protein structure network analysis. These selected phytoconstituents underwent all-atom molecular dynamics (MD) simulations, spanning 100&#xa0;ns each. The simulation results showed that ITK with elucidated compounds exhibited stability with minimal dynamics. In addition, we performed an MM-PBSA analysis, which indicated a strong binding affinity. This study highlights the potential of Withanolide A, Amorphispironon E, and 27-DHA as preliminary leads for further experimental validation and preclinical investigation toward therapeutic development.</p>

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Identification of potential inhibitors of interleukin-2-inducible T-cell kinase: insights from docking, molecular dynamics, MMPBSA and free energy landscape studies

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月4日

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  • Shazia Ahmed,
  • Arunabh Choudhury,
  • Mohammad Umar Saeed,
  • Taj Mohammad,
  • Afzal Hussain,
  • Mohamed F. Alajmi,
  • Dharmendra Kumar Yadav,
  • Anas Shamsi,
  • Md. Imtaiyaz Hassan

摘要

Interleukin-2-inducible T-cell kinase (ITK) is an essential enzyme that plays a key role in both the activation and differentiation of T-cells. As a member of the Tec family of non-receptor tyrosine kinases, ITK is predominantly expressed in T cells, exerting a critical influence on T-cell receptor signaling and downstream pathways. Moreover, ITK regulates cytokine production, notably interleukin-2 (IL-2), and the differentiation of Th2 cells. In the context of immunology, ITK has garnered significant attention, particularly for its potential to address immune-related conditions such as cancer and autoimmune diseases, including lymphoproliferative diseases. In this study, we performed a structure-based virtual screening utilizing a library of plant-based small molecules to identify inhibitors of ITK. The initial selection of phytochemicals was guided by adherence to the Lipinski rule of five. After molecular docking, top-ranked hits in terms of binding affinity underwent screening for physicochemical and pharmacokinetic properties and PASS analyses. The three selected phytochemicals, Withanolide A, Amorphispironon E, and 27-Deoxy-14-hydroxywithaferin A (27-DHA) demonstrated remarkable binding affinity to ITK with a docking score of − 9.2, − 9.1, and − 9.1 kcal/mol, respectively. All the phytochemicals showed specific binding to the ATP-binding site of ITK as revealed by protein structure network analysis. These selected phytoconstituents underwent all-atom molecular dynamics (MD) simulations, spanning 100 ns each. The simulation results showed that ITK with elucidated compounds exhibited stability with minimal dynamics. In addition, we performed an MM-PBSA analysis, which indicated a strong binding affinity. This study highlights the potential of Withanolide A, Amorphispironon E, and 27-DHA as preliminary leads for further experimental validation and preclinical investigation toward therapeutic development.