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Published on: February 9, 2021
The molecular mechanisms of androgen receptor in nephrolithiasis
Ziyu Fang1, Yonghan Peng1, Ling Li1
1Department of Urology, Changhai Hospital, The Second Military Medical University, No.168 Changhai Road, Shanghai 200433, Republic of China.
Objectives:
This study aimed to investigate the molecular mechanisms of androgen receptor (AR) in nephrolithiasis.
Methods:
Human kidney 2(HK-2) cells were transfected with Lentiviruses expressing AR (DEC-AR), shRNA targeting AR (sh-AR) or the empty vector control using the pLEX lentiviral vector system. The expression levels of AR were measured by qRT-PCR at 72h postinfection, and cells under different treatments were collected for microarray analysis. Differentially expressed genes (DEGs) were identified using Student's t-test. The protein-protein interaction (PPI) network was constructed for negatively correlated DEGs using GeneMANIA. Then, functional and pathway enrichment analysis were performed for the genes in the PPI network.
Results:
The qRT-PCR revealed that expression level of AR in DEC-AR cells was obviously increased and decreased in sh-AR cells at 72h postinfection (p<0.05). Totally, 64 negatively correlated DEGs showed lower expressions and 63 negatively correlated DEGs were up-regulated in the DEC-AR HK2 cells. Negatively correlated DEGs were significantly related to cell differentiation, response to stimulus, multicellular organismal process and multicellular organismal development. Pathway enrichment analysis revealed that DEGs mainly participated in the rheumatoid arthritis (CCL2, CSF1, IL11, LTB and MMP1), gematopoietic cell lineage (CD33, CD44, CSF1 and IL11) and TNF signaling pathway (CCL2, CSF1, MMP9 and VCAM1). Meanwhile, CD44, LAMC2 and THBS2 were significantly enriched in ECM-receptor interaction.
Conclusion:
The negatively correlated DEGs, especially CCL2, CD44, MMP1 and MMP9, might play critical roles in nephrolithiasis.
Insights
Androgen receptor (AR) mechanisms in kidney stone (nephrolithiasis) formation were studied. Key genes like CCL2 and CD44 were identified as potentially critical in nephrolithiasis development.
Area of Science:
- Molecular biology
- Genomics
- Nephrology
Background:
- Nephrolithiasis, or kidney stone disease, affects millions globally.
- The role of the androgen receptor (AR) in nephrolithiasis pathogenesis remains incompletely understood.
- Investigating AR's molecular mechanisms can reveal novel therapeutic targets.
Purpose of the Study:
- To elucidate the molecular mechanisms of androgen receptor (AR) in nephrolithiasis.
- To identify key genes and pathways regulated by AR in kidney cells.
Main Methods:
- Human kidney (HK-2) cells were manipulated to overexpress (DEC-AR) or knockdown (sh-AR) the androgen receptor.
- Gene expression profiling (microarray) was performed to identify differentially expressed genes (DEGs).
- Protein-protein interaction (PPI) networks and pathway enrichment analyses were conducted on identified DEGs.
Main Results:
- AR manipulation significantly altered gene expression in HK-2 cells.
- 64 downregulated and 63 upregulated negatively correlated DEGs were identified in DEC-AR cells.
- DEGs were implicated in cell differentiation, immune response, and pathways including rheumatoid arthritis and TNF signaling.
Conclusions:
- The study identified key negatively correlated differentially expressed genes (DEGs) in AR-modulated kidney cells.
- Genes such as CCL2, CD44, MMP1, and MMP9 are highlighted as potentially critical players in nephrolithiasis.
- These findings provide insights into AR's role and potential therapeutic targets for kidney stone disease.
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