Attachment of calcium oxalate monohydrate crystals on patterned surfaces of proteins and lipid bilayers.
Attachment of calcium oxalate monohydrate crystals on patterned surfaces of proteins and lipid bilayers.
复制标题
草酸钙一水合物晶体的附着在蛋白质和脂质双层的图案表面上。
DOI:
10.1021/ja106202y
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发表时间:
2010-09-29
影响因子:
15
通讯作者:
Ward MD
中科院分区:
文献类型:
--
作者:
An Z;Lee S;Oppenheimer H;Wesson JA;Ward MD
The attachment of calcium oxalate monohydrate (COM) crystals to renal tubules is thought to be one of the critical steps of kidney stone formation. Patterns of phosphatidylserine (DPPS) bilayers and osteopontin (OPN) were fabricated on silica substrates through a combination of micro-contact printing technique and fusion of lipid vesicles to create spatially organized surfaces of lipids and proteins that may mimic renal tubule surfaces while allowing direct visualization of the competition for COM attachment to compositionally different regions. In the case of DPPS-OPN patterns, micron-sized COM crystals dispersed in saturated aqueous calcium oxalate solutions attached preferentially to the OPN regions, in agreement with other in vitro studies that have suggested a binding affinity of OPN to COM crystal surfaces. COM crystals attached with nearly equal coverage to OPN and DPPS surfaces alone, suggesting that the preferential segregation of COM crystals to the OPN regions on the patterned surfaces reflects reversible attachment of micron-sized COM crystals capable of Brownian motion. These attached microcrystals then grow larger over time during immersion in the supersaturated calcium oxalate solutions. Free OPN, a major constituent in urine, adsorbs on COM crystals and suppresses attachment to DPPS, suggesting a link between OPN and reduced attachment of COM crystals to renal epithelium. This patterning protocol can be expanded to other urinary molecules, providing a convenient approach to ranking the effects of biomolecules on COM crystal attachment and the pathogenesis of kidney stones.
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DOI:
10.1097/01.asn.0000040593.93815.9d
发表时间:
2003-01-01
影响因子:
13.6
作者:
Wesson, JA;Johnson, RJ;Hughes, J
通讯作者:
Hughes, J
影响因子:
3.9
作者:
Talham, DR;Backov, R;Khan, SR
通讯作者:
Khan, SR
影响因子:
6.6
作者:
Yamate, T;Kohri, K;Kurita, T
通讯作者:
Kurita, T
影响因子:
56.9
作者:
Sackmann, E
通讯作者:
Sackmann, E
DOI:
10.1073/pnas.0307900100
发表时间:
2004-02-17
影响因子:
11.1
作者:
Qiu, SR;Wierzbicki, A;De Yoreo, JJ
通讯作者:
De Yoreo, JJ