Calcium Dependent Repair
Calcium Dependent Repair - Related Videos
03:22
Calcium-Dependent Hydrophobic Interaction Chromatography: A Technique to Purify Calcium-Binding Proteins Based on Hydrophobic Interactions
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2025
In this video, we demonstrate the purification of calcium-binding protein from a dialyzed cell lysate through calcium-dependent hydrophobic interaction chromatography. The calcium-binding proteins expose a hydrophobic region upon binding with calcium, facilitating interaction with a hydrophobic group on resin. Later these proteins are eluted using calcium chelator EDTA that reverses the interaction.
02:25
Overview of DNA Repair
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2020
In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage. Chemically...
01:54
Base Excision Repair
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2020
One of the common DNA damages is the chemical alteration of single bases by alkylation, oxidation, or deamination. The altered bases cause mispairing and strand breakage during replication. This type of damage causes minimal change to the DNA double helix structure and can be repaired by the base excision repair (BER) pathways. BER corrects damaged DNA sequences by removing the damaged base and restoring the original base sequence using the complementary strand as a template. The first step of...
16:44
Imaging Cell Membrane Injury and Subcellular Processes Involved in Repair
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Cited by 47 •
2014
The process of healing injured cells involves trafficking of specific proteins and subcellular compartments to the site of cell membrane injury. This protocol describes assays to monitor these processes.
08:14
Assessing T-cell Receptor-Induced Calcium Influx Using a Calcium Indicator Dye
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2025
This video analyzes T-cell receptor-induced calcium influx in T-cells. Anti-CD3 antibodies activate the T-cell signaling pathways, leading to an increase in intracellular calcium ions that bind with Indo-1 dye. In flow cytometry, a spectrum shift from the calcium-free state to the calcium-bound state correlates with T-cell receptor-induced calcium influx.
FAQs
When membrane integrity is disrupted, extracellular Ca2+ rapidly enters the cell and acts as an emergency signal. The increased intracellular calcium activates calcium-sensitive proteins that coordinate the repair response rather than allowing the lesion to remain passive. This signaling links the initial physical damage to the cellular machinery needed to restore membrane continuity.
Calcium-sensitive proteins help initiate vesicle trafficking toward the damaged region. The vesicles then undergo membrane fusion, allowing their membranes to contribute to a sealing patch over the lesion. This coordinated movement and fusion are important because repair requires more than calcium detection; the cell must also deliver membrane material to the injured site.
A damaged membrane can disrupt the cell’s controlled separation from its surroundings. Rapid formation of a repair patch helps limit ion imbalance by restoring a barrier around the cell interior. By reducing the persistence of this imbalance, calcium-dependent repair supports cellular survival and helps prevent damage from progressing to cell death.
Mechanical stress increases the relevance of membrane repair because repeated physical strain can challenge membrane integrity. Skeletal muscle provides a particularly important biological context for this process. Studying how calcium signals activate vesicle trafficking and membrane fusion in such cells helps explain how tissues maintain structural and functional stability after injury.
A study can follow the response as a connected sequence: membrane disruption, extracellular Ca2+ entry, activation of calcium-sensitive proteins, vesicle trafficking, membrane fusion, and formation of a sealing patch. Organizing the process in this order helps researchers relate the initial lesion to restoration of membrane integrity and preservation of cellular homeostasis.
Neurons are another important setting for examining calcium-dependent repair because they can experience membrane injury during cellular damage. The same general response links calcium entry with activation of repair machinery and membrane sealing. Investigating this connection provides biological context for understanding how injured neurons may limit membrane failure and loss of cellular stability.
Research on this mechanism connects membrane resilience with disease-related questions in both muscle and nervous tissue. In muscular dystrophy, the focus can include how mechanically stressed muscle cells preserve membrane integrity. In neurodegeneration research, it can address how injured neurons respond. These findings may also inform therapies designed to improve membrane resilience.