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The terminal web is a filamentous structure found at the apical surface of epithelial cells that possess microvilli. It is composed primarily of actin filaments stabilized by spectrin, which also anchors the terminal web to the apical cell membrane. The presence of myosin II and tropomyosin helps to explain the contractile ability of the ...
The plus ends of the actin filaments are located at the tip of the microvillus and are capped, possibly by capZ proteins, [2] while the minus ends are anchored in the terminal web composed of a complicated set of proteins including spectrin and myosin II. The space between microvilli at a cell's surface is called the intermicrovillous space.
Duodenum with brush border of microvilli. Illustration of the brush border membrane of small intestinal villi. A brush border (striated border or brush border membrane) is the microvillus-covered surface of simple cuboidal and simple columnar epithelium found in different parts of the body.
LEMS is often associated with lung cancer (50–70%), specifically small-cell carcinoma, [4] making LEMS a paraneoplastic syndrome. [5] Of the people with small-cell lung cancer, 1–3% have LEMS. [3] In most of these cases, LEMS is the first symptom of the lung cancer, and it is otherwise asymptomatic. [3]
Katzenberger et al. graphs survival versus time for subsets of patients with varying Ki-67 indices. He shows median survival times of about one year for 61–90% Ki-67 and nearly 4 years for 5–20% Ki-67 index. [48] MCL cell types can aid in prognosis in a subjective way. Blastic is a larger cell type. Diffuse is spread through the node.
The Mayo Clinic Cancer Center is one of the oldest NCI-designated cancer centers in the United States, having first been designated in 1973. [3] The main location of the Mayo Clinic is in Rochester, MN. Campuses in Arizona and Florida opened later and became part of the Mayo Clinic Cancer Center in 2003. [4] [5]
The terminal bar is located on the lateral surface of epithelial cells, where the lateral surface meets the apical surface. It should not be confused with the terminal web , which is an actinous web underlying microvilli on specialized epithelial cells.
The cytoplasmic peripheral protein encoded by this gene can be phosphorylated by protein-tyrosine kinase in microvilli and is a member of the ERM protein family. This protein serves as a linker between plasma membrane and actin cytoskeleton. It plays a key role in cell surface structure adhesion, migration, and organization. [6]