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相关概念视频

T Cell Types and Functions01:24

T Cell Types and Functions

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When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
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Hypodermis01:02

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The hypodermis (the subcutaneous layer or superficial fascia) is present directly below the dermis. It connects the skin to the underlying fascia (fibrous tissue) of the bones and muscles. It is not strictly a part of the skin, although the border between the hypodermis and dermis can be difficult to distinguish. The hypodermis consists of well-vascularized, loose, areolar connective tissue and adipose tissue, which functions as a mode of fat storage and provides insulation and cushioning for...
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An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
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相关实验视频

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Author Spotlight: Semi-Automated Isolation of the Stromal Vascular Fraction from Murine White Adipose Tissue Using a Tissue Dissociator
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2型免疫调节皮肤白色脂肪组织功能

Sabrina Satzinger1, Sebastian Willenborg1, Xiaolei Ding2

  • 1Department of Dermatology, University of Cologne, Cologne, Germany.

The Journal of investigative dermatology
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2型免疫力,通过介质的介素-4受体α (IL-4Rα) 信号传递,对于皮肤再生和代谢平衡至关重要. 乙氨基是这个过程的关键调节者,影响皮肤和脂肪组织的发育.

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科学领域:

  • 免疫学 免疫学 免疫学
  • 皮肤病学 皮肤病学
  • 代谢的恒常状态 (metabolic homeostasis) 是指代谢过程中的恒常状态.

背景情况:

  • 2型免疫反应越来越多地被认为是其在组织维护,再生和代谢平衡中的作用.
  • 在皮肤再生和平衡中控制2型免疫的特定分子机制仍然不完全理解.

研究的目的:

  • 调查介素-4受体α (IL-4Rα) 信号传导在各种皮肤细胞区的再生中的作用.
  • 阐明2型免疫细胞参与生命早期皮肤和脂肪组织恒温的分子基础.

主要方法:

  • 对全球IL-4Rα缺乏的小鼠皮肤表型的分析.
  • 对激素敏感脂酶激活和脂解的评估.
  • 在IL-4/增强的GFP记者小鼠中进行免疫组织化学和流动细胞计分析 (FACS).
  • 评价皮肤和脂肪组织在eosinophil-deficient小鼠.

主要成果:

  • 在年轻小鼠中,IL-4Rα缺乏导致卵泡间表皮缩,皮肤白色脂肪组织厚度增加.
  • 缺少IL-4Rα减少了对激素敏感的脂酶激活,损害了脂解.
  • 在出生后的第21天,IL-4的表达达到顶峰,乙素是主要的IL-4产生的细胞.
  • 氨基酸缺乏症模仿了在IL-4Rα缺乏小鼠中观察到的脂解缺陷,证实了氨基酸在皮肤白色脂肪组织脂解中的重要作用.

结论:

  • IL-4Rα信号传递是细胞间表皮维护和早期发育期间皮肤白脂肪组织中激素敏感脂酶介导的脂解的关键调节器.
  • 乙氨基酸在皮肤白色脂肪组织中调节脂解是不可或缺的,这突显了它们在皮肤平衡和代谢调节中的重要作用.