| Thermal Stability of Heterotrimeric pMHC Proteins as Determined by Circular Dichroism Spectroscopy
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Author:
Date:
2017-07-05
[Abstract] T cell receptor (TCR) recognition of foreign peptide fragments, presented by peptide major histocompatibility complex (pMHC), governs T-cell mediated protection against pathogens and cancer. Many factors govern T-cell sensitivity, including the affinity of the TCR-pMHC interaction and the stability of pMHC on the surface of antigen presenting cells. These factors are particularly relevant for the peptide vaccination field, in which more stable pMHC interactions could enable more effective protection against disease. Here, we discuss a method for the determination of pMHC stability that we have used to investigate HIV immune escape, T-cell sensitivity to cancer antigens and mechanisms leading to autoimmunity.
[摘要] 由肽主要组织相容性复合物（pMHC）提供的外源肽片段的T细胞受体（TCR）识别控制T细胞介导的针对病原体和癌症的保护。 许多因素控制T细胞敏感性，包括TCR-pMHC相互作用的亲和力和pMHC在抗原呈递细胞表面的稳定性。 这些因素对于肽疫苗接种领域尤其重要，其中更稳定的pMHC相互作用可以实现更有效的防止疾病的保护。 在这里，我们讨论一种测定pMHC稳定性的方法，我们已经用来调查HIV免疫逃逸，T细胞对癌症抗原的敏感性和导致自身免疫的机制。
【背景】CD8 + T细胞对外来入侵者或失调自身的反应的能力取决于细胞表面上稳定的pMHC I类（pMHCI）表达。在结构上，MHCI分子在α1和α2结构域之间的界面处形成由两个平行的α螺旋形成的肽结合槽，其具有β片的底部（Latron等人，1992）。肽结合槽具有与结合肽的N-和C-末端紧密相互作用的特异性氨基酸的主要肽结合口袋（B和F）。虽然这些口袋可以适应一系列氨基酸，但它们表现出对使用结构和生物化学方法表征的某些侧链的偏好（Parker等人，1992）。该信息已被用于产生所谓的“异型”肽，其中具有差的MHC锚的天然肽可以用与MHC最佳结合的氨基酸进行修饰（Cole等人，2010 ...
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| Isolation and Culture of Human Adipose-derived Stem Cells from Subcutaneous and Visceral White Adipose Tissue Compartments
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Author:
Date:
2016-11-20
[Abstract] Human Adipose-derived Stem/Stromal Cells (ASCs) have been widely used in stem cell and obesity research, as well as clinical applications including cell-based therapies, tissue engineering and reconstruction. Compared with mesenchymal stem cells (MSCs) derived from other tissues such as umbilical cord and bone marrow, isolation of ASCs from human white adipose tissue (WAT) has great advantages due to its rich tissue source and simple surgical procedure. In this detailed protocol we describe a protocol to isolate and characterize ASCs from human WAT. Molecular characterization of isolated ASCs was performed through surface marker expression profiling using flow cytometry. Adipogenic capacity of the isolated ASCs was confirmed through inducing adipogenic differentiation and Oil Red O ...
[摘要] Human Adipose-derived Stem/Stromal Cells (ASCs) have been widely used in stem cell and obesity research, as well as clinical applications including cell-based therapies, tissue engineering and reconstruction. Compared with mesenchymal stem cells (MSCs) derived from other tissues such as umbilical cord and bone marrow, isolation of ASCs from human white adipose tissue (WAT) has great advantages due to its rich tissue source and simple surgical procedure. In this detailed protocol we describe a protocol to isolate and characterize ASCs from human WAT. Molecular characterization of isolated ASCs ...
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| Isolation and Primary Culture of Various Cell Types from Whole Human Endometrial Biopsies
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Author:
Date:
2016-11-20
[Abstract] The isolation and primary culture of cells from human endometrial biopsies provides valuable experimental material for reproductive and gynaecological research. Whole endometrial biopsies are collected from consenting women and digested with collagenase and DNase I to dissociate cells from the extracellular matrix. Cell populations are then isolated through culturing, filtering and magnetic separation using cell-surface antigen markers. Here we provide a comprehensive protocol on how to isolate and culture individual cell types from whole endometrial tissues for use in in vitro experiments.
[摘要] 从人子宫内膜活组织检查中分离和原代培养细胞为生殖和妇科研究提供了有价值的实验材料。从同意的妇女收集完整的子宫内膜活检组织并用胶原酶和DNA酶I消化以从细胞外基质中分离细胞。然后通过使用细胞表面抗原标记物的培养，过滤和磁性分离来分离细胞群。在这里，我们提供了如何从整个子宫内膜组织分离和培养个体细胞类型以用于体外实验的全面方案。
[背景] 人子宫内膜是子宫内层最粘的层。其由柱状上皮和基础基质层组成，其经历循环再生，生长和响应于循环激素的转化。子宫内膜衬里分化为腺分泌表型为囊胚植入和成功怀孕提供了一个好客的环境。在没有怀孕这个层脱落，导致月经。从人子宫内膜活组织检查中分离和培养细胞允许在体外功能评估和与患者结果相关的细胞特征的研究。子宫内膜细胞的分离和培养是研究妇科和产科医学的许多方面的非常宝贵的研究模型，包括不孕，植入失败，复发性流产和月经紊乱。全人子宫内膜活检包含人子宫内膜基质细胞（HESCs），腔和子宫内膜上皮细胞（HEEC），红细胞和免疫细胞的混合群体。 ...
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