Proteasomes Are Critical for Maintenance of CD133+CD24+ Kidney Progenitor Cells
Kidney progenitor cells, although rare and dispersed, play a key role in the repair of renal tubules after acute kidney damage. However, understanding these cells has been challenging due to the limited access to primary renal tissues and the absence of immortalized cells to model kidney progenitors...
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MDPI AG
2023-08-01
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| Series: | International Journal of Molecular Sciences |
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| Online Access: | https://www.mdpi.com/1422-0067/24/17/13303 |
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| author | Sarmad Al-Marsoummi Aaron A. Mehus Swojani Shrestha Rayna Rice Brooke Rossow Seema Somji Scott H. Garrett Donald A. Sens |
| author_facet | Sarmad Al-Marsoummi Aaron A. Mehus Swojani Shrestha Rayna Rice Brooke Rossow Seema Somji Scott H. Garrett Donald A. Sens |
| author_sort | Sarmad Al-Marsoummi |
| collection | DOAJ |
| description | Kidney progenitor cells, although rare and dispersed, play a key role in the repair of renal tubules after acute kidney damage. However, understanding these cells has been challenging due to the limited access to primary renal tissues and the absence of immortalized cells to model kidney progenitors. Previously, our laboratory utilized the renal proximal tubular epithelial cell line, RPTEC/TERT1, and the flow cytometry technique to sort and establish a kidney progenitor cell model called Human Renal Tubular Precursor TERT (HRTPT) which expresses CD133 and CD24 and exhibits the characteristics of kidney progenitors, such as self-renewal capacity and multi-potential differentiation. In addition, a separate cell line was established, named Human Renal Epithelial Cell 24 TERT (HREC24T), which lacks CD133 expression and shows no progenitor features. To further characterize HRTPT CD133+CD24+ progenitor cells, we performed proteomic profiling which showed high proteasomal expression in HRTPT kidney progenitor cells. RT-qPCR, Western blot, and flow cytometry analysis showed that HRTPT cells possess higher proteasomal expression and activity compared to HREC24T non-progenitor cells. Importantly, inhibition of the proteasomes with bortezomib reduced the expression of progenitor markers and obliterated the potential for self-renewal and differentiation of HRTPT progenitor cells. In conclusion, proteasomes are critical in preserving progenitor markers expression and self-renewal capacity in HRTPT kidney progenitors. |
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| issn | 1661-6596 1422-0067 |
| language | English |
| last_indexed | 2024-03-10T23:21:14Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
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| series | International Journal of Molecular Sciences |
| spelling | doaj.art-3836153caed54bb1a6ee6d2df3da41e62023-11-19T08:15:18ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672023-08-0124171330310.3390/ijms241713303Proteasomes Are Critical for Maintenance of CD133+CD24+ Kidney Progenitor CellsSarmad Al-Marsoummi0Aaron A. Mehus1Swojani Shrestha2Rayna Rice3Brooke Rossow4Seema Somji5Scott H. Garrett6Donald A. Sens7Department of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202, USADepartment of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202, USADepartment of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202, USADepartment of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202, USADepartment of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202, USADepartment of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202, USADepartment of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202, USADepartment of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202, USAKidney progenitor cells, although rare and dispersed, play a key role in the repair of renal tubules after acute kidney damage. However, understanding these cells has been challenging due to the limited access to primary renal tissues and the absence of immortalized cells to model kidney progenitors. Previously, our laboratory utilized the renal proximal tubular epithelial cell line, RPTEC/TERT1, and the flow cytometry technique to sort and establish a kidney progenitor cell model called Human Renal Tubular Precursor TERT (HRTPT) which expresses CD133 and CD24 and exhibits the characteristics of kidney progenitors, such as self-renewal capacity and multi-potential differentiation. In addition, a separate cell line was established, named Human Renal Epithelial Cell 24 TERT (HREC24T), which lacks CD133 expression and shows no progenitor features. To further characterize HRTPT CD133+CD24+ progenitor cells, we performed proteomic profiling which showed high proteasomal expression in HRTPT kidney progenitor cells. RT-qPCR, Western blot, and flow cytometry analysis showed that HRTPT cells possess higher proteasomal expression and activity compared to HREC24T non-progenitor cells. Importantly, inhibition of the proteasomes with bortezomib reduced the expression of progenitor markers and obliterated the potential for self-renewal and differentiation of HRTPT progenitor cells. In conclusion, proteasomes are critical in preserving progenitor markers expression and self-renewal capacity in HRTPT kidney progenitors.https://www.mdpi.com/1422-0067/24/17/13303HRTPTkidney progenitorproteasomesHREC24Tproximal tubuleproteasomal inhibitors |
| spellingShingle | Sarmad Al-Marsoummi Aaron A. Mehus Swojani Shrestha Rayna Rice Brooke Rossow Seema Somji Scott H. Garrett Donald A. Sens Proteasomes Are Critical for Maintenance of CD133+CD24+ Kidney Progenitor Cells International Journal of Molecular Sciences HRTPT kidney progenitor proteasomes HREC24T proximal tubule proteasomal inhibitors |
| title | Proteasomes Are Critical for Maintenance of CD133+CD24+ Kidney Progenitor Cells |
| title_full | Proteasomes Are Critical for Maintenance of CD133+CD24+ Kidney Progenitor Cells |
| title_fullStr | Proteasomes Are Critical for Maintenance of CD133+CD24+ Kidney Progenitor Cells |
| title_full_unstemmed | Proteasomes Are Critical for Maintenance of CD133+CD24+ Kidney Progenitor Cells |
| title_short | Proteasomes Are Critical for Maintenance of CD133+CD24+ Kidney Progenitor Cells |
| title_sort | proteasomes are critical for maintenance of cd133 cd24 kidney progenitor cells |
| topic | HRTPT kidney progenitor proteasomes HREC24T proximal tubule proteasomal inhibitors |
| url | https://www.mdpi.com/1422-0067/24/17/13303 |
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