Nail Fold Capillaries
Nail Fold Capillaries - Related Videos
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Capillary Electrophoresis (CE)
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2023
Source: Laboratory of Dr. B. Jill Venton - University of Virginia Capillary electrophoresis (CE) is a separation technique that separates molecules in an electric field according to size and charge. CE is performed in a small glass tube called a capillary that is filled with an electrolyte solution. Analytes are separated due to differences in electrophoretic mobility, which varies with charge, solvent viscosity, and size. Traditional electrophoresis in gels is limited in the amount of voltage...
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Molecular Chaperones and Protein Folding
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The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein. The...
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2023
Nails are one of the important accessory structures of the skin. They are hard, protective structures that cover the dorsal surface of the distal phalanges of fingers and toes. Nails are composed of specialized keratinized cells and serve various functions, including protection, sensation, and manual dexterity. The main components of a nail include the following. Nail Plate: The nail plate is the visible portion of the nail that extends beyond the fingertips or toes. It is a hard, translucent...
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Protein Folding
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Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation which is critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.Protein Structure Is Critical to Its Biological FunctionProteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
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Protein Folding
0 Views •
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Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation which is critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.Protein Structure Is Critical to Its Biological FunctionProteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
FAQs
Nail fold capillaries are useful because their superficial location permits direct visualization of peripheral microcirculation rather than relying only on indirect findings. Under magnification and illumination, examiners can assess loop architecture alongside the movement of blood through these vessels. This makes local microvascular changes accessible for clinical assessment and research.
Assessment focuses on capillary density, size, shape, arrangement, and blood flow. These features provide complementary information: density and arrangement describe how regularly the loops are distributed, while size, shape, and flow characterize their structural and circulatory appearance. Considering the pattern as a whole helps identify microvascular abnormalities rather than relying on one isolated feature.
Enlarged or missing capillaries, hemorrhages, and disorganized arrangements are important abnormal findings. Each represents a visible departure from the capillary pattern being assessed, and their combined presence can support recognition of altered microcirculation. In medicine, these observations are particularly relevant when evaluating vascular involvement associated with connective tissue diseases.
The examination uses magnification and illumination to make the superficial capillary loops visible at the nail fold. This permits observation of their size, shape, density, and arrangement, while also allowing assessment of blood flow. The resulting view supplies structural and circulatory information from the peripheral microcirculation for clinical or research evaluation.
Clinicians use these findings to evaluate microvascular abnormalities associated with connective tissue diseases, including systemic sclerosis and related disorders. The observed pattern can contribute to diagnosis and disease classification, especially when abnormalities such as enlarged or absent loops, hemorrhages, or disorganization are present. The examination therefore adds vascular information to medical assessment.
Serial assessment can show whether microvascular abnormalities remain stable or change over time. Comparing capillary density, size, shape, arrangement, hemorrhages, and blood flow across examinations helps track vascular involvement rather than providing only a single-timepoint observation. This longitudinal information supports monitoring in systemic sclerosis and related connective tissue disorders.