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相关概念视频

Structural Protein Function01:56

Structural Protein Function

Structural proteins are a category of proteins responsible for functions ranging from cell shape and movement to providing support to major structures such as bones, cartilage, hair, and muscles. This group includes proteins such as collagen, actin, myosin, and keratin.
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity.  In bones and teeth, it mineralizes to form...
Matrix Proteoglycans and Glycoproteins01:21

Matrix Proteoglycans and Glycoproteins

Proteoglycans are extensively glycosylated proteins, commonly found in the extracellular matrix, interwoven with collagen fibers. Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers associated with large amounts of proteoglycans. These proteoglycans have long negative charges that attract cations, which in turn attract water molecules. This influx of ions and water molecules swells up the proteoglycan like a water-soaked gel that can...
Tight Junctions01:29

Tight Junctions

Tight junctions are molecular seals between cells that prevent the leaking of fluids, ions, and other small solutes across cavities and compartments in multicellular organisms. They are mainly composed of claudin and occludin transmembrane proteins, and other proteins such as tricellulin and JAM (junctional adhesion molecule). All these proteins are 4-pass transmembrane proteins, except JAM, which is a single-pass transmembrane protein belonging to the immunoglobulin superfamily. The...
Dense Connective Tissue01:13

Dense Connective Tissue

Dense connective tissue contains more collagen fibers than loose connective tissue. As a consequence, it displays greater resistance to stretching. There are two major categories of dense connective tissue— regular and irregular.
Dense Regular Connective Tissue
In dense regular connective tissue, fibers are arranged parallel to each other, enhancing its tensile strength and resistance to stretching in the direction of the fiber orientations. Ligaments and tendons are made of dense regular...
Papillary Dermis01:11

Papillary Dermis

Dermis
The dermis might be considered the "core" of the integumentary system, as distinct from the epidermis and hypodermis. It contains blood and lymph vessels, nerves, and other structures, such as hair follicles and sweat glands. The dermis is made of two layers of connective tissue that comprise an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts.
Papillary Layer
The papillary layer is made of loose, areolar connective tissue, which means the collagen and...
Reticular Dermis01:15

Reticular Dermis

The papillary and reticular dermis are the two layers of the dermis. They are made of connective tissue with fibers of collagen extending from one to the other, making the border between the two somewhat indistinct. The dermal papillae extending into the epidermis belong to the papillary layer, whereas the dense collagen fiber bundles below belong to the reticular layer.
Reticular Layer
Underlying the papillary layer is the much thicker reticular layer, composed of dense, irregular connective...

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相关实验视频

Updated: Jun 30, 2026

Encapsulation Thermogenic Preadipocytes for Transplantation into Adipose Tissue Depots
08:30

Encapsulation Thermogenic Preadipocytes for Transplantation into Adipose Tissue Depots

Published on: June 2, 2015

高密度脂蛋白和内皮功能.

B J O'Connell1, J Genest

  • 1Cardiovascular Genetics Laboratory, McGill University Health Center, Royal Victoria Hospital, Montreal, Quebec, Canada.

Circulation
|October 17, 2001
PubMed
概括
此摘要是机器生成的。

高水平的HDL胆固醇和阿波利波蛋白A-I通过促进胆固醇的去除,可以预防冠状动脉疾病. 这些颗粒参与了复杂的相互作用,影响了对心血管健康至关重要的各种细胞过程.

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Characterization of Leukocyte-platelet Rich Fibrin, A Novel Biomaterial
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Characterization of Leukocyte-platelet Rich Fibrin, A Novel Biomaterial

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Evaluation of Keratinocyte Proliferation on Two- and Three-dimensional Type I Collagen Substrates
08:19

Evaluation of Keratinocyte Proliferation on Two- and Three-dimensional Type I Collagen Substrates

Published on: April 22, 2019

相关实验视频

Last Updated: Jun 30, 2026

Encapsulation Thermogenic Preadipocytes for Transplantation into Adipose Tissue Depots
08:30

Encapsulation Thermogenic Preadipocytes for Transplantation into Adipose Tissue Depots

Published on: June 2, 2015

Characterization of Leukocyte-platelet Rich Fibrin, A Novel Biomaterial
08:14

Characterization of Leukocyte-platelet Rich Fibrin, A Novel Biomaterial

Published on: September 29, 2015

Evaluation of Keratinocyte Proliferation on Two- and Three-dimensional Type I Collagen Substrates
08:19

Evaluation of Keratinocyte Proliferation on Two- and Three-dimensional Type I Collagen Substrates

Published on: April 22, 2019

科学领域:

  • 生物化学 生物化学
  • 心血管生物学 心血管生物学
  • 分子医学是分子医学.

背景情况:

  • 高密度脂蛋白 (HDL) 胆固醇和阿波蛋白A-I (ApoA-I) 水平的升高与对冠状动脉疾病 (CAD) 的保护有关.
  • 高密度胆固醇颗粒在逆胆固醇运输中起着至关重要的作用,将胆固醇从外围组织转移到肝脏以排出.
  • 了解HDL相互作用的分子机制是开发CAD疗法的关键.

研究的目的:

  • 在心血管健康的背景下阐明底层脂蛋白相互作用的复杂机制.
  • 探索HDL粒子相互作用如何影响与动脉样硬化和CAD相关的细胞通路.

主要方法:

  • 这项研究侧重于高密度脂蛋白颗粒的分子和细胞相互作用,特别是涉及阿波利波蛋白AI.
  • 它检查了非比莱尔相互作用,包括蛋白质受体参与,脂相互作用和细胞信号激活.

主要成果:

  • 脂蛋白相互作用是复杂的,涉及特定的蛋白质受体结合和充电的脂接触,而不仅仅是膜融合.
  • 这些相互作用触发了调节关键细胞功能的细胞信号通路.
  • 关键的调节过程包括血管运动功能,血小板激活,血栓形成/血栓溶解,细胞粘附,细胞亡,增殖和胆固醇稳定.

结论:

  • HDL胆固醇和ApoA-I通过复杂的分子相互作用提供了对CAD的保护.
  • 这些相互作用调节各种细胞过程,影响血管健康和疾病.
  • 对这些途径的进一步研究可能会揭示CAD的新型治疗点.