Expression of a K48R mutant ubiquitin protects mouse testis from cryptorchid injury and aging.
Expression of a K48R mutant ubiquitin protects mouse testis from cryptorchid injury and aging.
复制标题
K48R 突变体泛素的表达可保护小鼠睾丸免受隐睾损伤和衰老。
DOI:
10.1016/s0002-9440(10)63614-0
复制
发表时间:
2003
期刊:
影响因子:
--
通讯作者:
K. Boekelheide
中科院分区:
文献类型:
--
作者:
Reza Rasoulpour;H. Schoenfeld;D. Gray;K. Boekelheide
Testis injury models can be useful for determining the in vivo function of genes. In this study, ubiquitin, a tag for 26S-proteasome degradation, was mutated at lysine 48 (K48R) to inhibit ubiquitin chain assembly. K48R transgenic mice had testes with delayed germ cell loss following the acute injury of experimental cryptorchidism, and were resistant to the chronic injury of aging-associated testicular atrophy. After 4 days of cryptorchid-mediated heat stress, the average weight of cryptorchid testes in wild-type ubiquitin mice was significantly lower (P < 0.05) than in K48R mutant ubiquitin mice, indicating that altered ubiquitination delayed germ cell death. Light microscopy confirmed that the testicular injury, in both wild-type and K48R ubiquitin mice, was due to germ cell death. In addition, wild-type ubiquitin mice aged 19 to 22 months showed greater testicular atrophy and decreased average seminiferous tubule diameter when compared with K48R-aged testes. These results demonstrate a resistance to testicular injury conferred by the K48R mutation, suggesting that ubiquitin-mediated protein degradation is involved in the processing or modulation of testicular insults.
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DOI:
10.1210/endo.141.5.7446
发表时间:
2000
期刊:
Endocrinology.
影响因子:
--
作者:
Shetty,G;Wilson,G;Huhtaniemi,I;Shuttlesworth,GA;Reissmann,T;Meistrich,ML
通讯作者:
Meistrich,ML
影响因子:
--
作者:
L. Luo;Haolin Chen;B. Zirkin
通讯作者:
L. Luo;Haolin Chen;B. Zirkin
DOI:
10.1210/endo.142.12.8526
发表时间:
2001
期刊:
Endocrinology.
影响因子:
--
作者:
Syntin,P;Chen,H;Zirkin,BR;Robaire,B
通讯作者:
Robaire,B
DOI:
10.1210/endo.143.5.8802
发表时间:
2002
期刊:
Endocrinology.
影响因子:
--
作者:
Chen,Haolin;Hardy,MatthewP;Zirkin,BarryR
通讯作者:
Zirkin,BarryR
影响因子:
--
作者:
Boekelheide,K;Hall,SJ
通讯作者:
Hall,SJ