Wnt signaling in kidney: the initiator or terminator?
Ping Meng1,2, Mingsheng Zhu3, Xian Ling1
1State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Disease, Division of Nephrology, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Ave, Guangzhou, 510515, China.
Abstract:
The kidney is a key organ in the human body that excretes toxins and sustains the water-electrolyte balance. During embryonic development and disease progression, the kidney undergoes enormous changes in macrostructure, accompanied by a variety of microstructural histological changes, such as glomerular formation and sclerosis, tubule elongation and atrophy, interstitial establishment, and fibrosis progression. All of these rely on the frequent occurrence of cell death and growth. Notably, to overcome disease, some cells regenerate through self-repair or progenitor cell differentiation. However, the signaling mechanisms underlying kidney development and regeneration have not been elucidated. Recently, Wnt signaling has been noted to play an important role. Although it is a well-known developmental signal, the role of Wnt signaling in kidney development and regeneration is not well recognized. In this review, we review the role of Wnt signaling in kidney embryonic development, tissue repair, cell division, and progenitor cell differentiation after injury. Moreover, we briefly highlight advances in our understanding of the pathogenic mechanisms of Wnt signaling in mediating cellular senescence in kidney parenchymal and stem cells, an irreversible arrest of cell proliferation blocking tissue repair and regeneration. We also highlight the therapeutic targets of Wnt signaling in kidney diseases and provide important clues for clinical strategies.
Insights
Wnt signaling is crucial for kidney development and regeneration. Understanding its role in cell repair and disease offers new therapeutic targets for kidney diseases.
Area of Science:
- Nephrology
- Developmental Biology
- Cell Biology
Background:
- The kidney regulates vital functions like toxin excretion and water-electrolyte balance.
- Kidney development and disease involve significant histological changes driven by cell death and growth.
- Cellular regeneration through self-repair or progenitor differentiation is key to overcoming kidney disease, but underlying mechanisms remain unclear.
Purpose of the Study:
- To review the multifaceted role of Wnt signaling in kidney embryonic development.
- To elucidate Wnt signaling's involvement in kidney tissue repair, cell division, and progenitor cell differentiation post-injury.
- To highlight Wnt signaling's pathogenic role in cellular senescence and its implications for kidney repair.
Main Methods:
- Literature review focusing on Wnt signaling pathways in renal contexts.
- Analysis of studies investigating Wnt signaling during embryonic kidney development.
- Examination of research on Wnt signaling's impact on kidney injury, regeneration, and senescence.
Main Results:
- Wnt signaling is integral to embryonic kidney development and cellular processes like progenitor cell differentiation.
- Dysregulation of Wnt signaling contributes to cellular senescence, impeding kidney tissue repair and regeneration.
- The review consolidates current understanding of Wnt signaling's complex functions in renal health and disease.
Conclusions:
- Wnt signaling is a critical regulator of kidney development and regeneration.
- Aberrant Wnt signaling, particularly cellular senescence, presents a barrier to effective kidney repair.
- Targeting Wnt signaling pathways offers promising therapeutic avenues for treating kidney diseases.
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The kidneys are bean-shaped organs located in the retroperitoneal space, on either side of the vertebral column, between the T12 and L3 vertebrae. They are partially protected by the rib cage and surrounded by perirenal fat, which provides cushioning. They are responsible for urine formation and play critical roles in regulating blood pressure, electrolyte levels, and hormone production. The ureters...


