Background: The normal development of the embryonic kidney is critical for human kidney function. However, the key genes, biological processes, and pathways involved in various developmental stages of human embryonic kidneys remain poorly understood.
Methods: In this study, we collected kidney samples from human embryos ranging from 3 to 7 months of development. Through transcriptomic sequencing, we identified stage-specific highly expressed genes and biological processes associated with kidney development and function.
Results: Our results revealed high expression of genes associated with renal system processes during early embryonic development. As the kidney developed, genes linked to kidney function, such as renal absorption, renal sodium excretion, and regulation of renal sodium excretion, were highly expressed. In addition, the complex regulatory relationship among genes associated with kidney development, kidney morphogenesis, and cell differentiation involved in kidney development was illustrated. These findings suggest that the development of the renal system is a major event in the early kidney. With the development of the kidney, the function of water absorption and salt ion metabolism will be gradually acquired. The development of the human embryonic kidney requires the synergistic regulation by multiple genes. Notably, beyond identifying known genes, we also identified many novel genes implicated in kidney development and function. Furthermore, pseudotime trajectory and weighted gene co-expression network analysis further elucidated distinct biological processes active in the kidney across distinct developmental stages.
Conclusion: These results provide an essential basis for future studies on kidney development and diseases arising from fetal kidney anomalies.
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