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<p>Insects, as diverse and ecologically dominant organisms, rely exclusively on innate immunity to defend against a wide array of microbial threats. This paper presents an integrative review of insect immune mechanisms, highlighting the molecular, cellular, and systemic components that underpin host defense. The immune response is orchestrated through physical barriers, cellular processes and humoral factors. Evolutionarily conserved pattern recognition receptors (PRRs) are essential to these processes. Emphasis is laid on pivotal functions of hemocytes, the significance of microbiome interactions in immune regulation, and the emerging influence of non-coding RNAs. Furthermore, the paper explores defensive symbiosis, environmental and evolutionary influences on immune dynamics, and applications in biotechnology and pest management. Model organisms, such as <i>Drosophila melanogaster</i> and <i>Bombyx mori</i>, serve as critical systems for unravelling innate immunity, with translational relevance to vertebrate immunology and vector control strategies. Understanding these mechanisms offers valuable insights into conserved immune pathways and holds promise for advancing strategies in human disease prevention, therapeutic innovation, and global health.</p>

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Insect immunity unveiled: exploring the molecular and cellular defenses against microbial threats

  • 期刊论文

  • 发表日期：

    2026年5月8日

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  • Preena Makkar,
  • Chandra Kant Singh,
  • Nitin V,
  • Parminder Kaur Narang,
  • Kushneet Kaur Sodhi

摘要

Insects, as diverse and ecologically dominant organisms, rely exclusively on innate immunity to defend against a wide array of microbial threats. This paper presents an integrative review of insect immune mechanisms, highlighting the molecular, cellular, and systemic components that underpin host defense. The immune response is orchestrated through physical barriers, cellular processes and humoral factors. Evolutionarily conserved pattern recognition receptors (PRRs) are essential to these processes. Emphasis is laid on pivotal functions of hemocytes, the significance of microbiome interactions in immune regulation, and the emerging influence of non-coding RNAs. Furthermore, the paper explores defensive symbiosis, environmental and evolutionary influences on immune dynamics, and applications in biotechnology and pest management. Model organisms, such as Drosophila melanogaster and Bombyx mori, serve as critical systems for unravelling innate immunity, with translational relevance to vertebrate immunology and vector control strategies. Understanding these mechanisms offers valuable insights into conserved immune pathways and holds promise for advancing strategies in human disease prevention, therapeutic innovation, and global health.