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Sequence-Defined Heteromultivalent Precision Glycomacromolecules Bearing Sulfonated/Sulfated Nonglycosidic Moieties Preferentially Bind Galectin-3 and Delay Wound Healing of a Galectin-3 Positive Tumor Cell Line in an In Vitro Wound Scratch Assay.
Macromolecular Bioscience ( IF 4.6 ) Pub Date : 2020-07-26 , DOI: 10.1002/mabi.202000163
Tanja Freichel 1 , Viktoria Heine 2 , Dominic Laaf 2 , Eleanor E Mackintosh 3 , Sophia Sarafova 4 , Lothar Elling 2 , Nicole L Snyder 3 , Laura Hartmann 1
Affiliation  

Within this work, a new class of sequence‐defined heteromultivalent glycomacromolecules bearing lactose residues and nonglycosidic motifs for probing glycoconjugate recognition in carbohydrate recognition domain (CRD) of galectin‐3 is presented. Galectins, a family of β‐galactoside‐binding proteins, are known to play crucial roles in different signaling pathways involved in tumor biology. Thus, research has focused on the design and synthesis of galectin‐targeting ligands for use as diagnostic markers or potential therapeutics. Heteromultivalent precision glycomacromolecules have the potential to serve as ligands for galectins. In this work, multivalency and the introduction of nonglycosidic motifs bearing either neutral, amine, or sulfonated/sulfated groups are used to better understand binding in the galectin‐3 CRD. Enzyme‐linked immunosorbent assays and surface plasmon resonance studies are performed, revealing a positive impact of the sulfonated/sulfated nonglycosidic motifs on galectin‐3 binding but not on galectin‐1 binding. Selected compounds are then tested with galectin‐3 positive MCF 7 breast cancer cells using an in vitro would scratch assay. Preliminary results demonstrate a differential biological effect on MCF 7 cells with high galectin‐3 expression in comparison to an HEK 293 control with low galectin‐3 expression, indicating the potential for sulfonated/sulfated heteromultivalent glycomacromolecules to serve as preferential ligands for galectin‐3 targeting.

中文翻译:

在体外伤口划痕试验中,带有磺化/硫酸化非糖苷部分的序列定义的异多价精密糖基大分子优先结合 Galectin-3 并延迟 Galectin-3 阳性肿瘤细胞系的伤口愈合。

在这项工作中,提出了一类新的序列定义的异质多价糖大分子,它们带有乳糖残基和非糖苷基序,用于探测半乳糖凝集素-3 的碳水化合物识别域 (CRD) 中的糖缀合物识别。半乳糖凝集素是 β-半乳糖苷结合蛋白的一个家族,已知在涉及肿瘤生物学的不同信号通路中起着至关重要的作用。因此,研究集中在半乳糖凝集素靶向配体的设计和合成上,用作诊断标志物或潜在治疗剂。杂多价精密糖大分子具有作为半乳糖凝集素配体的潜力。在这项工作中,多价性和引入带有中性、胺基或磺化/硫酸化基团的非糖苷基序用于更好地理解半乳糖凝集素-3 CRD 中的结合。进行了酶联免疫吸附测定和表面等离子体共振研究,揭示了磺化/硫酸化非糖苷基序对半乳糖凝集素-3 结合而非半乳糖凝集素-1 结合的积极影响。然后使用体外划痕试验用半乳糖凝集素 3 阳性 MCF 7 乳腺癌细胞对选定的化合物进行测试。初步结果表明,与具有低半乳糖凝集素-3 表达的 HEK 293 对照相比,具有高半乳糖凝集素-3 表达的 MCF 7 细胞具有不同的生物学效应,表明磺化/硫酸化异多价糖大分子有可能作为半乳糖凝集素-3 靶向的优先配体. 然后使用体外划痕试验用半乳糖凝集素 3 阳性 MCF 7 乳腺癌细胞对选定的化合物进行测试。初步结果表明,与具有低半乳糖凝集素-3 表达的 HEK 293 对照相比,具有高半乳糖凝集素-3 表达的 MCF 7 细胞具有不同的生物学效应,表明磺化/硫酸化异多价糖大分子有可能作为半乳糖凝集素-3 靶向的优先配体. 然后使用体外划痕试验用半乳糖凝集素 3 阳性 MCF 7 乳腺癌细胞对选定的化合物进行测试。初步结果表明,与具有低半乳糖凝集素-3 表达的 HEK 293 对照相比,具有高半乳糖凝集素-3 表达的 MCF 7 细胞具有不同的生物学效应,表明磺化/硫酸化异多价糖大分子有可能作为半乳糖凝集素-3 靶向的优先配体.
更新日期:2020-07-26
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