Avtor/Urednik | Jezernik, Kristijan; Romih, Rok; Mannherz, Hans Georg; Koprivec, Daša | |
Naslov | Immunohistochemical detection of apoptosis, proliferation and inducible nitric oxide synthase in rat urothelium damaged by cyclophosphamide treatment | |
Tip | članek | |
Vir | Cell Biol Int | |
Vol. in št. | Letnik 27 | |
Leto izdaje | 2003 | |
Obseg | str. 863-9 | |
Jezik | eng | |
Abstrakt | The present study was conducted to investigate cell death, proliferation and inducible nitric oxide synthase (iNOS) immunoreactivity in rat urothelium within 24 h after a single intraperitoneal dose of cyclophosphamide (CP). Necrotic cells were identified predominantly in the superficial cell layer from 1 h until 6 h after CP injection, most of them desquamating from the urothelium into the lumen of the urinary bladder. Active caspase-3 immunohistochemistry revealed apoptotic cells from 12 h until 24 h after CP injection. The apoptotic index reached a peak at 18 h and then rapidly dropped. Simultaneously with the decrease of apoptosis, the proliferation index increased from 18 h until 24 h after CP treatment. Immunoreaction to iNOS was first detected at 6 h in basal and intermediate cells. Later, iNOS immunoreactivity became stronger and was present in all cell layers. Our results suggest that the destruction of rat urothelium during 24 h after CP administration is due not only to necrosis, but also to apoptosis. The first 6 h are characterised by necrotic changes and no iNOS immunoreactivity. Thereafter, apoptosis and iNOS immunoreactivity are observed within the damaged urothelium. At 24 h after CP injection, iNOS immunoreactivity is still present, but proliferation prevails over cell death, enabling the urothelium to start regeneration. | |
Deskriptorji | BLADDER APOPTOSIS UROTHELIUM CELL DIVISION NITRIC-OXIDE SYNTHASE RATS, INBRED F344 CYCLOPHOSPHAMIDE MICROSCOPY, ELECTRON PROLIFERATING CELL NUCLEAR ANTIGEN IMMUNOHISTOCHEMISTRY |