Name: BAPTA-AM CAS 126150-97-8
Brand: Wuhan Fortuna Chemical Co., Ltd.

BAPTA-AM (1,2-bis(o-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid acetoxymethyl ester) is a membrane-permeable calcium chelator. It is widely used in biological and biochemical research to regulate intracellular calcium concentrations $[Ca^{2+}]_i$ . Here's a breakdown of its properties and uses:

Properties

Membrane Permeability: The "AM" (acetoxymethyl ester) group allows BAPTA-AM to cross cell membranes. Once inside the cell, cellular esterases cleave the AM groups, activating BAPTA and enabling it to chelate intracellular calcium.
High Selectivity for Calcium: BAPTA has a high affinity for $Ca^{2+}$ , allowing it to act as a buffer and reduce intracellular calcium spikes.
Fast Kinetics: BAPTA binds and releases calcium more quickly than some other chelators, making it effective for modulating rapid calcium dynamics.

Applications

Calcium Signaling Studies:

Used to study the role of $Ca^{2+}$ in processes such as neurotransmitter release, muscle contraction, and cell signaling.
Helps dissect pathways dependent on $Ca^{2+}$ by reducing its availability.

Neurobiology:

Investigates calcium's role in synaptic transmission and plasticity.
Protects neurons from calcium-induced excitotoxicity in research models.

Cell Biology:

Examines calcium's role in apoptosis, cell migration, and other cellular processes.

Drug Development:

Used to understand calcium-related diseases and test interventions targeting calcium signaling.

Cautions

Non-Specific Effects: Overuse can disrupt other intracellular processes and lead to toxicity.
Esterase Dependence: The efficiency of activation depends on intracellular esterase activity, which may vary among cell types.
Limited Longevity: Its chelating effects are transient, as BAPTA may be degraded or exported from the cell.

Researchers often use BAPTA-AM in combination with other tools, such as calcium imaging dyes, to monitor and manipulate calcium levels precisely.

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