OBJECTIVE: To investigate whether cells isolated from the upper urinary tract (UTCs) possess stem cell characteristics and could be an alternative cell source for patients with bladder cancer. Current tissue engineering approaches for urologic tissue regeneration require invasive tissue biopsies to obtain autologous cells, and these procedures are associated with potential complications, such as donor site morbidity. Recently, cells isolated from voided urine (VUCs) have been proposed as an alternative cell source for urologic tissue engineering. However, VUCs should not be used in patients with bladder cancer, because the voided urine sample could contain malignant cells. METHODS: Urine samples were collected from the upper urinary tract of 4 male patients with bladder cancer using a ureteral catheter. The samples were centrifuged and the pellets plated for primary culture. The cells were analyzed for colony-forming unit, proliferation rate, cytogenetics, stem cell characterization, and tumorigenicity. The results were compared with those of VUCs collected from 3 healthy men. RESULTS: The UTCs were able to form colonies, had a greater proliferation rate than the VUCs, and had a normal karyotype without any chromosomal aberrations. The UTCs possessed stem cell characteristics (expression of CD44+, CD73+, CD90+, CD105+, SSEA4+) and expressed several markers for urothelial, smooth muscle, and endothelial cell lineages. The UTCs did not form teratoma when implanted into the subcapsular space of a mouse kidney. CONCLUSION: The UTCs possessed stem cell characteristics and can potentially be an alternative cell source for urologic tissue regeneration in patients with bladder cancer.
OBJECTIVE: To investigate whether cells isolated from the upper urinary tract (UTCs) possess stem cell characteristics and could be an alternative cell source for patients with bladder cancer. Current tissue engineering approaches for urologic tissue regeneration require invasive tissue biopsies to obtain autologous cells, and these procedures are associated with potential complications, such as donor site morbidity. Recently, cells isolated from voided urine (VUCs) have been proposed as an alternative cell source for urologic tissue engineering. However, VUCs should not be used in patients with bladder cancer, because the voided urine sample could contain malignant cells. METHODS: Urine samples were collected from the upper urinary tract of 4 male patients with bladder cancer using a ureteral catheter. The samples were centrifuged and the pellets plated for primary culture. The cells were analyzed for colony-forming unit, proliferation rate, cytogenetics, stem cell characterization, and tumorigenicity. The results were compared with those of VUCs collected from 3 healthy men. RESULTS: The UTCs were able to form colonies, had a greater proliferation rate than the VUCs, and had a normal karyotype without any chromosomal aberrations. The UTCs possessed stem cell characteristics (expression of CD44+, CD73+, CD90+, CD105+, SSEA4+) and expressed several markers for urothelial, smooth muscle, and endothelial cell lineages. The UTCs did not form teratoma when implanted into the subcapsular space of a mouse kidney. CONCLUSION: The UTCs possessed stem cell characteristics and can potentially be an alternative cell source for urologic tissue regeneration in patients with bladder cancer.
Authors: Jun Nyung Lee; So Young Chun; Hyo-Jung Lee; Yu-Jin Jang; Seock Hwan Choi; Dae Hwan Kim; Se Heang Oh; Phil Hyun Song; Jin Ho Lee; Jong Kun Kim; Tae Gyun Kwon Journal: J Korean Med Sci Date: 2015-11-30 Impact factor: 2.153
Authors: Hye Suk Kang; Seock Hwan Choi; Bum Soo Kim; Jae Young Choi; Gang-Baek Park; Tae Gyun Kwon; So Young Chun Journal: J Korean Med Sci Date: 2015-11-30 Impact factor: 2.153
Authors: Nimshitha Pavathuparambil Abdul Manaph; Mohammed Al-Hawwas; Larisa Bobrovskaya; Patrick T Coates; Xin-Fu Zhou Journal: Stem Cell Res Ther Date: 2018-07-11 Impact factor: 6.832