Proton beam therapy is a form of radiotherapy, but using beams of protons which can be targeted to hit the tumour, deliver their load of cell-killing radiation and then stop.
Determine if direct tumor cell cytotoxicity, antigen release, and susceptibility to T-lymphocyte killing following radiation treatment is dose-dependent.
On the other hand, antioxidants may make the glioma more resistant to tumor killing by radiation [ 40], possibly leading to poorer patient survival.
New agents capable of killing radiation-resistant BPL cells and selectively augmenting their radiation sensitivity are therefore urgently needed.
This set was applied to the case of gadolinium-based nanoparticles (GdBN) used to amplify the radiation killing of U87 glioblastoma cells extracted from highly aggressive human tumor.
In this chapter, we examine the resistance of tumors to radiotherapy produced by hypoxia and, in particular, address the question of whether this resistance is the result of the physicochemical free radical mechanism that produces resistance to radiation killing of cells in vitro.
But the killing power of radiation has been known since "mountain sickness" -- lung cancer -- began surfacing among Czech uranium miners in the 1500s.
As there is less X-ray-induced DNA damage in the absence of oxygen, hypoxic cells are resistant to killing by ionising radiation (Brown and Wilson, 2004).
It is generally accepted that among the DNA damage induced mainly double-strand breaks (dsb) (Bryant, 1984; Ward, 1988; Wurm et al, 1994; Dikomey et al, 1998; Pfeiffer et al, 2000), and particularly residual dsb (Dikomey et al, 1998, 2000) are responsible for cell killing by ionising radiation.
Drug and radiation induced killing of brain tumor [22] and hepatoma [23] cells have been reported to rely on Fas signaling.
We and others have demonstrated that this is the dose where maximal indirect nontargeted radiation cell killing (the bystander effect) occurs (Seymour and Mothersill, 2000).
