Juergen F. Kolb

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An electrical model for biological cells predicts that for pulses with durations shorter than the charging time of the outer membrane, there is an increasing probability of electric field interactions with intracellular structures. Experimental studies in which human cells were exposed to pulsed electric fields of up to 300-kV/cm amplitude, with durations(More)
Novel therapies are needed for treating hepatocellular carcinoma (HCC) without recurrence in a single procedure. In this work we evaluated anti-neoplastic effects of a pulse power ablation (PPA) with nanosecond pulsed electric fields (nsPEFs), a non-thermal, non-drug, local, regional method and investigated its molecular mechanisms for hepatocellular(More)
The interaction of nanosecond duration pulsed electric fields (nsPEFs) with biological cells, and the models describing this behavior, depend critically on the electrical properties of the cells being pulsed. Here, we used time domain dielectric spectroscopy to measure the dielectric properties of Jurkat cells, a malignant human T-cell line, before and(More)
Mammalian cells exposed to electric field pulses of nanosecond duration (nsPEF; 60-ns, 12 kV/cm) experienced a profound and long-lasting increase in passive electrical conductance (G(m)) of the cell membrane, probably caused by opening of stable conductance pores (CPs). The CPs were permeable to Cl(-) and alkali metal cations, but not to larger molecules(More)
We have discovered a new, ultrafast therapy for treating skin cancer that is extremely effective with a total electric field exposure time of only 180 microsec. The application of 300 high-voltage (40 kV/cm), ultrashort (300 nsec) electrical pulses to murine melanomas in vivo triggers both necrosis and apoptosis, resulting in complete tumor remission within(More)
Modeling and experimental studies have shown that pulsed electric fields of nanosecond duration and megavolt per meter amplitude affect subcellular structures but do not lead to the formation of large pores in the outer membrane. This "intracellular electromanipulation" requires the use of pulse generators which provide extremely high power but low energy(More)
Many effective anti-cancer strategies target apoptosis and angiogenesis mechanisms. Applications of non-ionizing, nanosecond pulsed electric fields (nsPEFs) induce apoptosis in vitro and eliminate cancer in vivo; however in vivo mechanisms require closer analysis. These studies investigate nsPEF-induced apoptosis and anti-angiogenesis examined by(More)
The change in the membrane potential of Jurkat cells in response to nanosecond pulsed electric fields was studied for pulses with a duration of 60 ns and maximum field strengths of approximately 100 kV/cm (100 V/cell diameter). Membranes of Jurkat cells were stained with a fast voltage-sensitive dye, ANNINE-6, which has a subnanosecond voltage response(More)
The barrier function of plasma membrane in nsPEF-exposed mammalian cells was examined using whole-cell patch-clamp techniques. A specialized setup for nsPEF exposure of individual cells in culture was developed and characterized for artifact-free compatibility with the patch-clamp method. For the first time, our study provides experimental evidence that(More)
Electric pulses across intact vesicles and cells can lead to transient increase in permeability of their membranes. We studied the integrity of these membranes in response to external electric pulses of high amplitude and submicrosecond duration with a primary aim of achieving selective permeabilization. These effects were examined in two separate model(More)