Questions 34 through 37 concern recent clinical results using electric fields to disrupt rapidly dividing tumor cells. W

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Questions 34 Through 37 Concern Recent Clinical Results Using Electric Fields To Disrupt Rapidly Dividing Tumor Cells W 1 (140.38 KiB) Viewed 38 times

Questions 34 through 37 concern recent clinical results using electric fields to disrupt rapidly dividing tumor cells. When cells are divid- ing, some elements of the cell develop a small net charge, and others develop a dipole structure with a positive charge on one end and a negative charge on the other. When a uniform electric field is applied to the body, the field will not be uniform inside the body. The motion of charges and polarization effects, both of which vary strong from place to place, create a field that is quite variable at the level of the cell. The field is strong in some places and weak in others. The varying field exerts forces and torques on the cell components. This can disrupt cell division, which can have an especially large impact on the rapidly dividing cells in a tumor. To illustrate this idea, we consider a cylindrical element with a dipole structure but no net charge. embedded in a dividing cell. The varying environment of the cell cre- ates a local variation in the strength of the field. The field and the dipole element are shown in Figure Q20.34. FIGURE 020.34