Related Experiment Videos
Microlith formation in vitro by Madin Darby canine kidney (MDCK) cells
S Kageyama1, Y Ohtawara, K Fujita
1Department of Urology, Hamamatsu University School of Medicine, Japan.
Background:
The mechanism of renal stone genesis as well as the location of stone crystal formation in the kidney remains unclear. Possible sites of stone generation are either in the tubular lumen or tubular cell.
Methods:
We cultured Madin Darby canine kidney (MDCK), LLC-PK1 and Magen Krebs Niigata-28 (MKN-28) cells in DMEM + 10% FBS medium in a well without passage for 30 days.
Results:
MDCK cells produced microliths at the basolateral side but not on the lumen side of these cells. The other two cell lines did not form microliths.
Conclusion:
Our data show that microlith formation is a characteristic of MDCK cells and that biological mineralization of MDCK cells may serve as a human urolithiasis model in vitro. The findings support a significant role of the renal distal convoluted tubule and collecting ducts in the in vitro generation of urinary stones.
Insights
Madin Darby canine kidney (MDCK) cells form microliths on their basolateral side, unlike other cell lines. This discovery offers a new in vitro model for studying kidney stone formation in the distal convoluted tubule and collecting ducts.
Area of Science:
- Nephrology
- Cell Biology
- Biomineralization
Background:
- The precise mechanisms and locations of kidney stone (renal stone) crystal formation within the kidney are not fully understood.
- Potential sites for stone generation include the tubular lumen or the tubular cells themselves.
Purpose of the Study:
- To investigate the potential of cultured kidney cell lines to form microliths in vitro.
- To explore the cellular basis of renal stone genesis and establish a relevant in vitro model.
Main Methods:
- Cultured Madin Darby canine kidney (MDCK), LLC-PK1, and Magen Krebs Niigata-28 (MKN-28) cells.
- Maintained cells in DMEM + 10% FBS medium without passage for 30 days to observe microlith formation.
Main Results:
- MDCK cells successfully produced microliths, specifically on their basolateral side, not the lumen side.
- LLC-PK1 and MKN-28 cell lines did not exhibit microlith formation under the same culture conditions.
Conclusions:
- Microlith formation is a distinct characteristic of MDCK cells.
- MDCK cell biomineralization provides a viable in vitro model for human urolithiasis.
- These findings highlight the potential role of the renal distal convoluted tubule and collecting ducts in initiating urinary stones.