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| Electrical Pulses (Pulsed Electric Field therapies; PEF) are a bioelectromagnetic modality in oncology that delivers brief, high-voltage (or high-field) pulses to tissue to permeabilize membranes and/or ablate tumors. Clinically relevant categories commonly discussed: -Shorter, bipolar/high-frequency µs waveforms (H-FIRE) are repeatedly shown to reduce or eliminate muscle contractions versus classic monopolar IRE, improving tolerability and potentially reducing need for paralytics. -Nanosecond pulses with fast rise times can overcome membrane charging delays and directly polarize organelles, which is why rise-time engineering becomes a first-order variable for intracellular effects (mitochondria/ER, Ca²⁺, ROS, regulated death programs). -nsPEF / Nano-Pulse Stimulation (NPS) used as irreversible tumor ablation (intracellular emphasis). With ns pulses, fast rise times and short widths can drive intracellular membrane perturbation (not just plasma membrane), shifting biological response vs classic IRE.
In nsPEF systems the main engineering challenge is not current or power, but:
-generating fast rise times
-maintaining transmission line impedance
-preventing pulse distortion at the electrodes
Other important aspects of nsPEF
-mainly an electric field effect:
-Membrane breakdown typically occurs around 0.5–1 V across the membrane,
which corresponds to ~10–50 kV/cm fields in tissue.
-ns pulses terminate before plasma channels develop.
-impedance mismatch and cable dispersion is important
-nsPEF often induces programmed cell death rather than thermal ablation
The hallmark of nsPEF is simultaneous targeting of multiple intracellular pathways, particularly:
-Calcium signaling (Ca²⁺ release)
-Mitochondrial apoptosis (ΔΨm↓, Caspase-9↑, Caspase-3↑)
-ROS stress pathways
Research might show cancer cells have some greater sensitivity to nsPEF,
but nsPEF affects both normal and cancer cells
Electrical Pulses / PEF Oncology Modality — Ranked Mechanistic Axes
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| Caspase-12: a member of the caspase family, a group of cysteine proteases that play a crucial role in programmed cell death, also known as apoptosis. Caspase-12 is specifically involved in the endoplasmic reticulum (ER) stress-induced apoptosis pathway. On one hand, caspase-12 can act as a tumor suppressor by promoting apoptosis in response to ER stress, which can occur in cancer cells due to their high metabolic rate and increased demand for protein synthesis. On the other hand, some studies have suggested that caspase-12 can also contribute to cancer progression and resistance to chemotherapy. For example, caspase-12 can be inactivated in certain types of cancer, such as breast and lung cancer, which can lead to reduced apoptosis and increased tumor growth. Role of Caspase-12: Function: Caspase-12 is involved in the apoptotic pathway triggered by ER stress. It can activate downstream effector caspases, leading to apoptosis. It also plays a role in the inflammatory response by processing pro-inflammatory cytokines. Location: Unlike many other caspases, caspase-12 is primarily localized in the cytosol and the ER. |
| 3460- | EP, | Picosecond pulsed electric fields induce apoptosis in HeLa cells via the endoplasmic reticulum stress and caspase-dependent signaling pathways |
| - | in-vitro, | Cerv, | HeLa |
Query results interpretion may depend on "conditions" listed in the research papers. Such Conditions may include : -low or high Dose -format for product, such as nano of lipid formations -different cell line effects -synergies with other products -if effect was for normal or cancerous cells
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