ДАНДЖЕЛО Игорь (CA),БЛЕЙЛ Дастин (CA),ТОМ-Ю Стейси А. Л. (CA),ЭСКОБАР-КАБРЕРА Эрик (CA),ЛАРИО Пола И. (CA),ОРН Андерс (CA),ПУН Дэвид К. Ю. (CA),ДИКСИТ Сержит Б. (CA)
申请号:
RU2012145183/10
公开号:
RU2012145183A
申请日:
2011.03.28
申请国别(地区):
RU
年份:
2014
代理人:
摘要:
1. A polypeptide comprising a variant Fc region which comprises three or more modifications of amino acid residues as compared to wild-type Fc portion and exhibits an altered effect compared to a polypeptide comprising the wild type Fc region or a variant Fc region having only one of three or more modifications of amino acid residues wherein at least two of the three or more modifications provide a synergistic effect compared with the single modification at least at two positions, thereby demonstrating the selected binding profile with Fcγ-retseptorami.2. The polypeptide of claim 1, wherein the amino acid residue modifications cause the interaction and dynamic properties of the amino acids that provide enhanced affinity and / or specificity of binding to the first Fcγ-receptor, at the same time lowering the affinity and / or specificity of binding to a second Fcγ-receptor compared a polypeptide which lacks at least three or more amino acid modifications ostatkov.3. The polypeptide of claim 2, wherein the first Fcγ-receptor is FcγRIIIa-receptor and the second receptor is Fcγ-FcγRIIa or a FcγRIIb.4. The polypeptide of claim 1, wherein the amino acid residue modifications provide favorable FcγRIIIa - specific interactions and / or unfavorable interaction with FcγRIIa and / or FcγRIIb-retseptorami.5. The polypeptide of claim 1, wherein the amino acid residue modification minimally affect the FcγRIIIa-receptor, at the same time adversely affecting the binding of the polypeptide to FcγRIIa and / or FcγRIIb.6. The polypeptide of claim 1 which comprises modifying S239E / D265S / I332E.7. The polypeptide of claim 1 which comprises Modi1. Полипептид, содержащий вариантный Fc участок, который содержит три или более модификаций аминокислотных остатков по сравнению с Fc участком дикого типа и проявляет измененный эффект по сравнению с полипептидом, содержащим Fc участок дикого типа или вариантный Fc участок, имеющий только одну из трех или более модификаций аминокислотных остатк