An established rat model of inducing reversible acute tubular necrosis.
BACKGROUND
Acute tubular necrosis (ATN) is a challenging problem that still requires to be studied in animal models. Our aim was to prepare an established experimental model of inducing reversible ATN in rats by determining the optimum duration of ischemia induction to the kidney.


METHODS
Twenty-four hour after nephrectomy of the right kidney and clamping the pedicle of the left kidney for durations ranging from 10 to 55 minutes, the kidney function and the histologic changes were evaluated. Accordingly, the optimum duration of clamping was determined and in the next step, it was considered for induction of reversible ATN in another group of rats. This group was followed up for 14 days and the pathologic course and function of the kidney were observed.


RESULTS
Reversible ATN developed by 47-minute clamping of the renal pedicle. Blood urea nitrogen and serum creatinine levels were elevated up to threefold within 24 hours after the induction of ischemia and they decreased to their reference ranges after 12 and 6 days, respectively. In the histologic study of the kidneys, the least extend of injury was noted by the 14th day following the ATN induction. Even on the 14th day of the follow-up, some signs of ATN remained indicating that the tissue regeneration was not complete yet.


CONCLUSIONS
To integrate the experimental models of ATN, a rat model with 47-minute clamping of the renal pedicle for induction of ischemia seems appropriate. The resultant ATN remains for a long duration, while kidney function is alleviated.
Tabibi
Ali
A
Department of Nephrology, Shaheed Labbafinejad Medical Center, Shaheed Beheshti Medical University, Tehran, Iran.
Nouralizadeh
Akbar
A
Parvin
Mahmoud
M
Ghoraishian
Mohammed
M
Ghoreishian
Mohammad
M
Sadeghi
Pejman
P
Sadeghi
Peyman
P
Nafar
Mohsen
M
D000818:Animals; D003250:Constriction; D004195:Disease Models, Animal; D007511:Ischemia / Q000209:etiology* / Q000473:pathology / Q000503:physiopathology; D007683:Kidney Tubular Necrosis, Acute / Q000209:etiology* / Q000473:pathology / Q000503:physiopathology; D007684:Kidney Tubules / Q000098:blood supply*; D008297:Male; D009392:Nephrectomy; D051381:Rats; D017208:Rats, Wistar; D012077:Renal Artery / Q000601:surgery; D013997:Time Factors