Synthetic mucins in epithelial models to probe virus-mucin interactions

上皮模型中的合成粘蛋白用于探测病毒-粘蛋白相互作用

• 批准号: 10655654
• 负责人: Jessica Kramer
• 金额: $ 38.5万
• 依托单位: UNIVERSITY OF UTAH
• 依托单位国家: 美国
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-07-01 至 2027-06-30
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/10655654
• 关键词: Adhesions; Amino Acids; Antiviral Agents; Binding; Biology; Cell surface; Cells; Complex; Development; Diet; Diffusion; Disease; Drug Delivery Systems; Engineering; Epithelial Cells; Epithelium; Evolution; Future; Glycocalyx; Glycoproteins; Health; Heterogeneity; Host Defense; Human; Hydration status; Immunity; Infection; Jellyfish; Knowledge; Life; Life Cycle Stages; Lubrication; Malignant Neoplasms; Mentors; Modeling; Molecular; Molecular Weight; Mucins; Mucous body substance; Outcome; Pathway interactions; Pattern; Peptides; Play; Polymers; Polysaccharides; Prevention strategy; Proteins; Role; Sialic Acids; Specificity; Structure; Tissues; Underrepresented Populations; Vertebral column; Viral; Viral Genes; Virus; Virus Diseases; biophysical properties; chemical property; citizen science; disease transmission; equity, diversity, and inclusion; glycosylation; improved; novel therapeutics; nutrient absorption; pathogen; polymerization; polypeptide; preference; response; sugar; surface coating; tissue tropism

PROJECT SUMMARY Mucin glycoproteins are the essential component of mucus and the epithelial cellular glycocalyx. Mucins are essential for life in creatures from jellyfish to humans and play roles in hydration, lubrication, nutrient absorption, and host defense against pathogens. Mucin glycosylation is regulated by complex enzymatic pathways subject to flux, resulting in heterogeneous and variable glycan patterns that vary between tissues and species, and that evolve in response to diet and disease. The Kramer Lab is developing synthetic mucins, or synMUCs, that harness the chemical and biophysical properties of native mucins but have molecularly tunable structures. Polymerization of glycosylated amino acid N-carboxyanhydrides affords high molecular weight polypeptides with the native peptide and glycan linkages. Compared to short peptides, polysaccharides, or traditional polymers bearing attached sugars, synMUCs are the most authentic mucin mimics to date. The synMUCs will be applied in engineered models of the glycocalyx and secreted mucus. These models will find broad future application in studies of epithelial biology with application in cancer, drug delivery, immunity, and infection. Since mucins are on the front lines of cellular defense, diverse viruses have evolved strategies to adhere to their glycans, alter them, and even use them to enter host cells for replication. Virus-mucin binding can have outcomes on viral diffusion, tissue specificity, and replication but molecular details are lacking due to mucin heterogeneity. We will chemoenzymatically modify our synMUCs to display virus-binding sialic acid glycans. Viral binding preferences for various sialic acid structures in different densities and from varied peptide backbone compositions will be defined. The sialic-acid-bearing-synMUCs will be utilized to probe how mucins in the glycocalyx vs mucus regulate adhesion, cell entry and replication, tissue tropism and viral gene evolution. This knowledge will shed light on fundamental aspects of the viral life cycle and may assist in improving human health though development of new antiviral therapeutics and disease transmission prevention strategies. Additionally, scientific citizenship and mentoring are a priority and active involvement in supporting equity, diversity and inclusion of underrepresented groups in STEM will be a focus for the duration of the project and beyond.

项目摘要 粘蛋白糖蛋白是粘液和上皮细胞糖脂的必不可少的成分。粘蛋白是 从水母到人类生命的生命至关重要，在水合，润滑，营养吸收中扮演角色 并抗议病原体。粘蛋白糖基化受复杂酶促途径的调节 助焊剂，导致组织和物种之间变化的异质和可变的聚糖模式，并且 响应饮食和疾病而发展。 Kramer Lab正在开发合成粘蛋白或Synmucs， 利用天然粘蛋白的化学和生物物理特性，但具有分子可调结构。 糖基化氨基酸N-羧基氢化物的聚合可为高分子量多肽提供 天然肽和聚糖连接。与短肽，多糖或传统聚合物相比 轴承糖，synmucs是迄今为止最真实的粘蛋白模拟物。 Synmucs将被应用 在糖脂和分泌粘液的工程模型中。这些模型将在 对癌症，药物递送，免疫和感染的应用上皮生物学的研究。因为粘蛋白是 在细胞防御的前线，各种病毒已经发展出遵守聚糖的策略，改变了 它们，甚至使用它们进入主机单元进行复制。病毒粘膜结合可以在病毒上产生结果 扩散，组织特异性和复制，但由于粘蛋白异质性而缺乏分子细节。我们将 化学酶通过修饰我们的synmuc，以显示结合病毒的唾液酸聚糖。病毒结合偏好 对于不同密度和不同肽主链组成的各种唾液酸结构，将是 定义。唾液 - 含酸合成的合成子将用于探测糖蛋白中的粘蛋白如何与粘液中的粘蛋白 调节粘附，细胞进入和复制，组织乳房和病毒基因的进化。这些知识将丢失 阐明病毒生命周期的基本方面，并可能有助于改善人类健康 新的抗病毒治疗和疾病传播预防策略。另外，科学公民身份 指导是优先的，并且积极参与支持公平，多样性和包容 STEM中代表性不足的群体将在项目及其他过程中成为重点。