1Assistant Professor, Department of Zoology, Career Point University, Kota, Rajasthan 324003, India.
2Research scholar, Department of Zoology, Career Point University, Kota, Rajasthan 324003, India.
3Department of Zoology, Career Point University, Kota, Rajasthan 324003, India.
4*Assistant Professor, Department of Pharmacy, Career Point University, Kota, Rajasthan 324003, India.
Embryonic development is a highly coordinated and tightly regulated process governed by precise spatial and temporal control of gene expression. Model organisms, including Drosophila melanogaster, Caenorhabditis elegans, Danio rerio, and Mus musculus, have significantly advanced our understanding of the molecular mechanisms underlying developmental gene regulation. These systems have revealed conserved genetic pathways that regulate cell fate determination, tissue patterning, and organogenesis. This review comprehensively discusses the key regulatory mechanisms controlling gene expression during embryogenesis, including transcriptional regulation, epigenetic modifications, chromatin remodeling, and post-transcriptional processes. Special emphasis is placed on gene regulatory networks (GRNs), morphogen gradients, and major developmental signaling pathways such as Wnt, Notch, Hedgehog, and BMP/TGF-β, which collectively orchestrate embryonic pattern formation and cellular differentiation. Recent advancements in high-throughput and integrative technologies, including single-cell transcriptomics, CRISPR–Cas genome editing, and computational modeling, have enabled deeper insights into the dynamic regulatory landscapes of early development. Comparative analyses across model organisms highlight the evolutionary conservation of these regulatory mechanisms and their relevance to human developmental biology. Understanding these complex regulatory systems provides critical insights into the molecular basis of congenital disorders and supports the development of novel strategies in regenerative medicine and developmental therapeutics.
Keywords: Embryonic development; Gene regulation; Model organisms; Gene regulatory networks; Developmental signaling pathways; Epigenetic regulation.
How to cite this article: Mehla B, Shringi I, Vyas A, Naz S, Nagar H, Sharma R. Gene Regulatory Networks and Molecular Mechanisms of Embryogenesis in Model Organisms: Pharmaceutical Perspectives and Therapeutic Implications. Int J Drug Deliv Technol. 2026;16(1s): 1040-1053. DOI: 10.25258/ijddt.16.1s.115
Source of support: Nil.
Conflict of interest: None