Abstract:
:Triflavin, an Arg-Gly-Asp (RGD)-containing disintegrin purified from venom peptide inhibited platelet aggregation by interfering with the interaction of fibrinogen with alpha(IIb)beta(3) integrin. Using an immunostaining technique and electron microscopy, we investigated and compared the distribution of triflavin binding in both resting and activated platelets. Triflavin uniformly and strongly stained the plasma membrane and the open canalicular system (OCS), whereas a lesser extent of staining was seen on alpha-granules in both resting and activated platelets. Furthermore, resting unfixed platelets were incubated with triflavin for 10 min at 4 degrees C, and then rewarmed at 30 degrees C for 0, 10, and 30 min to advance internalization. At 0 min, platelets showed an extensive rim-staining pattern of bound triflavin on the surface membrane, which was then gradually internalized into the cytoplasmic OCS with prolonging of incubation times. However, triflavin bound fewer to alpha-granules than to the OCS within the 0-30-min period of internalization in both resting and activated platelets. Furthermore, triflavin did not influence physiological endocytosis in resting platelets. Comparing the 3D structures of triflavin and another disintegrin, echistatin, we found that the spatial differences between the RGD motif and the C-termini of structures of disintegrins may mediate functional differences of binding activity towards alpha(IIb)beta(3) integrin in resting platelets. These data indicate that (1) triflavin binds effectively to alpha(IIb)beta(3) on the platelet membrane and cytoplasmic OCS, but a relative lesser extent to alpha-granules in both resting and activated platelets; (2) triflavin is internalized in resting platelets independent of cellular activation; and (3) spatial differences between the RGD motif and the C-termini of disintegrins may play an important role in mediating disintegrin binding to alpha(IIb)beta(3) in resting platelets.
journal_name
Thromb Resjournal_title
Thrombosis researchauthors
Chuang WJ,Wu CH,Huang HN,Chen SH,Hsiao G,Lin CH,Sheu JRdoi
10.1016/s0049-3848(03)00104-xsubject
Has Abstractpub_date
2003-01-01 00:00:00pages
37-46issue
1eissn
0049-3848issn
1879-2472pii
S004938480300104Xjournal_volume
109pub_type
杂志文章abstract::This work demonstrates that after bolus intravenous injection standard heparin (SH) disappearance results from the combination of a saturable and a non saturable mechanism. Pharmacokinetics and pharmacodynamics of SH were studied by measuring the disappearance of increasing doses (5 - 500 anti-factor Xa U/kg) of 125I-...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(87)90075-2
更新日期:1987-06-15 00:00:00
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journal_title:Thrombosis research
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doi:10.1016/j.thromres.2018.03.012
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doi:10.1016/j.thromres.2004.07.007
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journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2007.04.005
更新日期:2007-01-01 00:00:00
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pub_type: 杂志文章
doi:10.1016/s0049-3848(03)00288-3
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pub_type: 杂志文章
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journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2005.11.008
更新日期:2006-01-01 00:00:00
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journal_title:Thrombosis research
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journal_title:Thrombosis research
pub_type: 杂志文章,评审
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更新日期:2004-01-01 00:00:00
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journal_title:Thrombosis research
pub_type: 杂志文章
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doi:10.1016/j.thromres.2006.06.005
更新日期:2007-01-01 00:00:00
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pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2002-02-01 00:00:00
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pub_type: 杂志文章
doi:10.1016/0049-3848(89)90463-5
更新日期:1989-07-01 00:00:00
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pub_type: 杂志文章
doi:10.1016/0049-3848(84)90256-1
更新日期:1984-06-15 00:00:00
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pub_type: 杂志文章
doi:10.1016/j.thromres.2007.01.012
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pub_type: 杂志文章
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更新日期:1986-02-15 00:00:00
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journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(87)90290-8
更新日期:1987-04-15 00:00:00
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journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/s0049-3848(98)00132-7
更新日期:1998-12-01 00:00:00
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pub_type: 杂志文章
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更新日期:2010-06-01 00:00:00
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journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2005.06.005
更新日期:2006-01-01 00:00:00
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pub_type: 杂志文章
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更新日期:1985-12-01 00:00:00
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pub_type: 杂志文章
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更新日期:1985-11-15 00:00:00
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journal_title:Thrombosis research
pub_type: 临床试验,杂志文章
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更新日期:2004-01-01 00:00:00
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journal_title:Thrombosis research
pub_type: 杂志文章
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更新日期:2018-11-01 00:00:00
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journal_title:Thrombosis research
pub_type: 杂志文章
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更新日期:2014-05-01 00:00:00