To prospectively assess safety and efficacy of prostatic artery embolization (PAE) with bleomycin-eluting microspheres for benign prostatic hyperplasia (BPH) in a canine model.
Twelve adult male beagles (mean age, 1. 6 y ± 0.2; range, 1.2-2.0 y) were randomly assigned to group A (n = 6; PAE with bleomycin-eluting 30-60-μm HepaSphere microspheres) and group B (n = 6; PAE with bland 30-60-μm HepaSphere microspheres) between April 2017 and November 2018. Plasma bleomycin concentration in group A was measured within 7 days. Prostate volume (PV) and ischemic volume after PAE were measured by magnetic resonance imaging. Prostates and adjacent organs were harvested after the last magnetic resonance study and histopathologically examined.
Plasma bleomycin concentration peaked at 10 minutes at 2,055.0 ng/mL ± 606.1 and lasted for 1,440 min at low levels after PAE. PV reduction percentage was greater in group A than in group B at 1 month (74.1% ± 4.3 vs 63.7% ± 3.5; P = .006) and 3 months (61.5% ± 6.7 vs 46.1% ± 3.8; P = .001) after PAE. Proportion of prostate ischemic volume was greater in group A than in group B (75.3% ± 3.0 vs 62.0% ± 7.1; P = .006) at 1 month after PAE. Proportion of prostate ischemic volume at 1 month positively correlated with PV percentage reduction at 3 months in group A (r = 0.840, P = .036) and group B (r = 0.844, P = .035). There were no complications or nontarget embolization to surrounding organs after the procedures.
In a canine model, PAE with bleomycin-eluting microspheres was feasible and well tolerated and caused ischemic necrosis and reduction in PV.
Journal of vascular and interventional radiology : JVIR. 2020 Apr 15 [Epub ahead of print]
Jin Long Zhang, Bing Yuan, Mao Qiang Wang, Jin Xin Fu, Feng Duan, Tao Wang, Liao Shen, Yan Wang, Jin Hong Liu, Yan Guang Shen, Xiu Qi Wang, Hong Tao Zhang, Hong Wei Li, Jie Yu Yan, Zhi Gang Song
Department of Interventional Radiology, Chinese PLA General Hospital, 28 Fu-xing Rd., Beijing 100853, P.R. China., Department of Interventional Radiology, Chinese PLA General Hospital, 28 Fu-xing Rd., Beijing 100853, P.R. China. Electronic address: ., Academy of Military Medical Sciences, Institute of Pharmacology and Toxicology, Beijing, P.R. China., Department of Pathology, Chinese PLA General Hospital, 28 Fu-xing Rd., Beijing 100853, P.R. China., Department of Radiology, Chinese PLA General Hospital, 28 Fu-xing Rd., Beijing 100853, P.R. China., Department of Urology Surgery, Second Hospital of Beijing Municipality, Beijing, P.R. China.