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Published on: September 1, 2015
Cell Proliferation and Apoptosis in ADPKD
1Molecular Medicine Laboratory, Department of Life systems, Sookmyung Women's University, Cheongpa-ro 47-gil 100, Yongsan-gu, Seoul, 04310, South Korea. eunji8902@sm.ac.kr.
Abstract:
Increased tubular epithelial cell proliferation with fluid secretion is a key hallmark of autosomal dominant polycystic kidney disease (ADPKD). With disruption of either PKD1 or PKD2, the main causative genes of ADPKD, intracellular calcium homeostasis and cAMP accumulation are disrupted, which in turn leads to altered signaling in the pathways that regulate cell proliferation. These dysregulations finally stimulate the development of fluid-filled cysts originating from abnormally proliferating renal tubular cells. In addition, dysregulated apoptosis is observed in dilated cystic tubules. An imbalance between cell proliferation and apoptosis seems to contribute to cyst growth and renal tissue remodeling in ADPKD. In this section, the mechanisms through which cell proliferation and apoptosis are involved in disease progression, and further, how those signaling pathways impinge on each other in ADPKD will be discussed.
Insights
Autosomal dominant polycystic kidney disease (ADPKD) involves increased kidney cell proliferation and altered apoptosis. These processes disrupt normal kidney function, leading to cyst formation and disease progression.
Area of Science:
- Nephrology
- Molecular Biology
- Genetics
Background:
- Autosomal dominant polycystic kidney disease (ADPKD) is characterized by increased renal tubular epithelial cell proliferation and fluid secretion.
- Mutations in PKD1 or PKD2 disrupt intracellular calcium homeostasis and cyclic adenosine monophosphate (cAMP) accumulation.
- These disruptions lead to altered signaling pathways regulating cell proliferation and contribute to cyst development.
Purpose of the Study:
- To discuss the mechanisms of cell proliferation and apoptosis in ADPKD progression.
- To explore the interplay between signaling pathways regulating these cellular processes in ADPKD.
Main Methods:
- Review of existing literature on ADPKD pathogenesis.
- Analysis of signaling pathways involved in cell proliferation and apoptosis.
Main Results:
- Increased tubular epithelial cell proliferation and dysregulated apoptosis are key features of ADPKD.
- Disrupted calcium and cAMP homeostasis due to PKD1/PKK2 mutations drive aberrant cell signaling.
- An imbalance between proliferation and apoptosis contributes to cyst growth and renal tissue remodeling.
Conclusions:
- Cell proliferation and apoptosis play critical roles in ADPKD pathogenesis.
- Understanding the crosstalk between signaling pathways is crucial for developing therapeutic strategies for ADPKD.
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