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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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| Plays a key role in activation of cellular immunity and subsequently, stimulation of antitumor immune-response. Based on its cytostatic, pro-apoptotic and antiproliferative functions, IFN-γ is considered potentially useful for adjuvant immunotherapy for different types of cancer. Moreover, it IFN-γ may inhibit angiogenesis in tumor tissue, induce regulatory T-cell apoptosis, and/or stimulate the activity of M1 proinflammatory macrophages to overcome tumor progression. However, the current understanding of the roles of IFN-γ in the tumor microenvironment (TME) may be misleading in terms of its clinical application. IFN-γ is often expressed in the tumor microenvironment, particularly in response to immune cell infiltration. Its expression can be influenced by the presence of tumor-infiltrating lymphocytes (TILs) and other immune cells. High levels of IFN-γ are typically associated with a Th1 immune response, which is generally considered beneficial for anti-tumor immunity. Tumor Suppression: In many cases, IFN-γ has tumor-suppressive effects, as it can inhibit tumor cell proliferation and induce apoptosis in certain cancer types. |
| 5487- | EP, | High-frequency irreversible electroporation improves survival and immune cell infiltration in rodents with malignant gliomas |
| - | in-vivo, | GBM, | NA |
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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