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| Content Provider | Springer Nature Link |
|---|---|
| Author | Lee, Chan Gyu Kang, Yoon Jong Kim, Hyung Sik Moon, Aree Kim, Sang Geon |
| Copyright Year | 2015 |
| Abstract | Measurable indicators of renal injury are required for the assessment of kidney function after toxicant challenge. In our previous study, pleckstrin homology-like domain, family A, member 3 (Phlda3) was a most greatly up-regulated molecule downstream from p53, culminating with kidney tubular injury. This study investigated the positive feedforward effect of Phlda3 on p53 in an effort to explain the largest increase of Phlda3 in injured tubules and the potential of its urine excretion. qRT-PCR assays confirmed a rapid and substantial increase in Phlda3 messenger RNA (mRNA) in the kidney cortex of mice treated with a single dose of cisplatin. Cisplatin overexpression of Phlda3 was verified by gene set analyses of three different microarray databases. In the immunohistochemistry, Phlda3 staining intensities were augmented in the tubules as kidney injury worsened. Moreover, the urinary content of Phlda3 was increased after cisplatin treatment, as were those of other kidney injury markers (Kim-1 and Timp-1). By contrast, cisplatin failed to increase Phlda3 mRNA in the liver despite hepatocyte necrosis and ensuing increases in serum transaminase activities. In NRK52E tubular cells, siRNA knockdown of Phlda3 enhanced the ability of cisplatin to increase p-Mdm2 presumably via Akt, enforcing the interaction between Mdm2 and p53. Consistently, a deficiency in Phlda3 abrogated p53 increase by cisplatin, indicating that Phlda3 promotes p53 accumulation. Phlda3 overexpression had the opposite effect. In addition, treatment with cyclosporine A or CdCl2, other nephrotoxicants, increased Phlda3 mRNA and protein levels in NRK52E cells, as did cisplatin treatment. Overall, Phlda3 may cause p53 accumulation through a feedforward pathway, facilitating tubular injury and its urine excretion. |
| Starting Page | 121 |
| Ending Page | 130 |
| Page Count | 10 |
| File Format | |
| ISSN | 07422091 |
| Journal | Cell Biology and Toxicology |
| Volume Number | 31 |
| Issue Number | 2 |
| e-ISSN | 15736822 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2015-03-26 |
| Publisher Place | Dordrecht |
| Access Restriction | Subscribed |
| Subject Keyword | Biomarker Cisplatin p53 Phlda3 Renal tubular injury Cell Biology Pharmacology/Toxicology Biochemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Health, Toxicology and Mutagenesis Toxicology |
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