Enhancement of Recombinant Human Endostatin on the Radiosensitivity of Human Pulmonary Adenocarcinoma A549 Cells and Its Mechanism

Figure 4

A549 cell apoptosis under hypoxia. (a) control group; (b) radiotherapy alone group; (c) endostar alone group; (d) endostar + radiotherapy.

(a)

(b)

(c)

(d)