[Effect of urinary Tamm-horsfall protein concentration changes under centrifugation and its association with urolithiasis formation in rats].
OBJECTIVE
To explore the concentration changes of Tamm-Horsefall protein (THP) under centrifugation in rat urine and discuss its association with urolithiasis formation.


METHODS
A total of 40 Wistar rats were divided randomly into 4 groups of flying with stone (A), flying without stone (B), stone without flying (C) and control (D). After centrifugation, the THP concentrations of each group were measured by enzyme-linked immunosorbent assay (ELISA). Then urinary system was dissected, stained with hematoxylin & eosin and observed under electron microscopy to examine the distribution and number of each section. The SPSS 13.0 software was used for data analyses.


RESULTS
Group A showed significant difference in THP concentrations with groups C and D ( (11 ± 4) vs (15 ± 6), (17 ± 4) ng/ml, P = 0.037 and 0.005).No statistically significant difference existed between groups A and B ((11 ± 5) ng/ml, P = 0.998) or groups C and D (P = 0.422). Group B had significant difference in THP concentrations with groups D (P = 0.036). Regarding the number of stones in ureter, Group A had statistically significant difference with B (P = 0.029).However, there was no difference in the number of bladder stones.In kidney stones, there was significant difference (P = 0.029) on "+ +" rating.


CONCLUSIONS
Centrifugation may reduce the urinary concentration of THP so as cause urolithiasis formation in rats.
Department of Urology, Air Force General Hospital, Beijing 100142, China.
Yuanhao
Y
Chen
Email: guoheqing@sina.com.
Heqing
H
Guo
Bin
B
Sun
Jianye
J
Li
Jingmin
J
Yan
Quan
Q
Hong
Zhikang
Z
Zou
Jianchang
J
Wang
D000054:Acceleration / Q000009:adverse effects*; D000818:Animals; D002498:Centrifugation / Q000009:adverse effects; D008297:Male; D051381:Rats; D017208:Rats, Wistar; D014545:Urinary Calculi / Q000209:etiology*; D058949:Uromodulin / Q000652:urine*
D058949:Uromodulin