Mice with defects in HB-EGF ectodomain shedding show severe developmental abnormalities.

Mice with defects in HB-EGF ectodomain shedding show severe developmental abnormalities.
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HB-EGF外生域脱落缺陷的小鼠表现出严重的发育异常。

DOI:
10.1083/jcb.200307035
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发表时间:
2003-11-10
影响因子:
7.8
通讯作者:
Mekada, E
Mekada, E
中科院分区:
生物学1区
文献类型:
--
作者:
Yamazaki, S;Iwamoto, R;Saeki, K;Asakura, M;Takashima, S;Yamazaki, A;Kimura, R;Mizushima, H;Moribe, H;Higashiyama, S;Endoh, M;Kaneda, Y;Takagi, S;Itami, S;Takeda, N;Yamada, G;Mekada, E

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肝素结合egf样生长因子(HB-EGF)首先作为膜锚定形式(proHB-EGF)合成,其可溶性形式(sHB-EGF)通过proHB-EGF的外域脱落释放。为了检验proHB-EGF加工在体内的意义,我们通过靶向基因替换产生突变小鼠,表达该分子的不可切割形式(HBuc)或跨膜结构域截断形式(HBΔtm)。HBuc/uc小鼠出现严重的心力衰竭和心脏瓣膜增大,表型与proHB-EGF缺失小鼠相似。另一方面,携带HBΔtm的小鼠在皮肤和心脏都表现出严重的增生。这些结果表明,在体内,proHB-EGF的外畴脱落对于HB-EGF的功能至关重要,并且这一过程需要严格控制。
Heparin-binding EGF-like growth factor (HB-EGF) is first synthesized as a membrane-anchored form (proHB-EGF), and its soluble form (sHB-EGF) is released by ectodomain shedding from proHB-EGF. To examine the significance of proHB-EGF processing in vivo, we generated mutant mice by targeted gene replacement, expressing either an uncleavable form (HBuc) or a transmembrane domain–truncated form (HBΔtm) of the molecule. HBuc/uc mice developed severe heart failure and enlarged heart valves, phenotypes similar to those in proHB-EGF null mice. On the other hand, mice carrying HBΔtm exhibited severe hyperplasia in both skin and heart. These results indicate that ectodomain shedding of proHB-EGF is essential for HB-EGF function in vivo, and that this process requires strict control.
DOI: 10.1006/bbrc.2001.4879
发表时间: 2001-05-18
影响因子: 3.1
作者:
Hirata, M;Umata, T;Mekada, E
通讯作者: Mekada, E
DOI: 10.1073/pnas.122249299
发表时间: 2002-06-25
影响因子: 11.1
作者:
Özcelik, C;Erdmann, B;Garratt, AN
通讯作者: Garratt, AN
DOI: 10.1038/73528
发表时间: 2000-03-01
期刊: NATURE GENETICS
影响因子: 30.8
作者:
Chen, BB;Bronson, RT;Neel, BG
通讯作者: Neel, BG
DOI: 10.1093/emboj/17.24.7260
发表时间: 1998-12-15
期刊: EMBO JOURNAL
影响因子: 11.4
作者:
Izumi, Y;Hirata, M;Mekada, E
通讯作者: Mekada, E