Poly(amidoamine) dendrimer-methotrexate conjugates: the mechanism of interaction with folate binding protein.

Poly(amidoamine) dendrimer-methotrexate conjugates: the mechanism of interaction with folate binding protein.
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DOI:
10.1021/mp500608s
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发表时间:
2014-11-03
影响因子:
4.9
通讯作者:
Banaszak Holl MM
Banaszak Holl MM
中科院分区:
医学2区
文献类型:
--
作者:
van Dongen MA;Rattan R;Silpe J;Dougherty C;Michmerhuizen NL;Van Winkle M;Huang B;Choi SK;Sinniah K;Orr BG;Banaszak Holl MM

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采用两个小分子接头G5-(COG-MTX)n、G5-(MFCO-MTX)n与G5-G5(D)二聚体D-(COG-MTX)n、D-(MFCO-MTX)n的缀合物一起沿着制备第5代聚(酰胺基胺)(G5 PAMAM)甲氨蝶呤(MTX)缀合物。单体G5-(COG-MTX)n缀合物仅表现出与叶酸结合蛋白(FBP)的弱的、快速可逆的结合,这与单价MTX结合一致。D-(COG-MTX)n偶联物表现出缓慢的起始、紧密结合机制,其中MTX首先与FBP结合,诱导蛋白质结构重排,随后通过聚合物-蛋白质货车范德华相互作用导致紧密结合。不可逆结合的程度取决于总MTX浓度,未观察到多价MTX结合的证据。
Generation 5 poly(amidoamine) (G5 PAMAM) methotrexate (MTX) conjugates employing two small molecular linkers, G5-(COG-MTX)n, G5-(MFCO-MTX)n were prepared along with the conjugates of the G5-G5 (D) dimer, D-(COG-MTX)n, D-(MFCO-MTX)n. The monomer G5-(COG-MTX)n conjugates exhibited only a weak, rapidly reversible binding to folate binding protein (FBP) consistent with monovalent MTX binding. The D-(COG-MTX)n conjugates exhibited a slow onset, tight-binding mechanism in which the MTX first binds to the FBP, inducing protein structural rearrangement, followed by polymer–protein van der Waals interactions leading to tight-binding. The extent of irreversible binding is dependent on total MTX concentration and no evidence of multivalent MTX binding was observed.
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