[Effects of platelet-derived membrane microparticles on angiogenesis in chick chorioallantoic membranes].
This study was purposed to investigate the angiogenesis effect of platelet-derived membrane microparticles (PMPs) in chick chorioallantoic membranes (CAM). Thrombin were adopted to activate the platelets and then PMPs were obtained. PMPs were isolated by high speed centrifugation. Flow cytometry (FCM) was adopted to evaluate the efficiency of thrombin to produce PMPs and BCA method was adopted to evaluate the content of PMPs. PMPs were put into CAM and the effects of PMPs on angiogenesis in CAM were observed. The results indicated that after incubation for 72 hours at the concentration of 80 microg/ml PMPs, the vessel nets in a 'spoked-wheel' pattern were shown around mixed fibrous filter membranes, number of vessel ramification was 112.5 +/- 11.31 and ratio of vessel area/CAM area was 6.19 +/- 1.29%, but there were not localized allantoic vessels developing in the control group, the number of vessel ramification and ratio of vessel area/CAM area in control group were 82.6 +/- 8.05 and 1.78 +/- 0.33 respectively, so there was significant difference between PMP and control groups. In above mentioned conditions, the number of vessel ramification and ratio of vessel area/CAM area in VEGF group were 128.4 +/- 10.02 and 7.44 +/- 1.36 respectively, so there was no difference between PMP and VEGF groups. It is concluded that PMPs show promotive effect on the formation of capillaries in chick chorioallantoic membranes.
Chen
Bao-An
BA
Department of Hematology, Zhongda Hospital, Southeast University, Nanjing 210009, China. bachen@seu.edu.cn
Zhong
Yue-Jiao
YJ
Huang
Cheng-Yin
CY
Li
Cui-Ping
CP
Shi
Guang-Yao
GY
Xiao
Jian-Yu
JY
Tang
Rong-Cai
RC
Ding
Jia-Hua
JH
Gao
Chong
C
Sun
Yun-Yu
YY
Cheng
Jian
J
Wang
Jun
J
Zhao
Gang
G
Ma
Yan
Y
Song
Hui-Hui
HH
Fei
Fei
F
Pei
Xiao-Ping
XP
D000818:Animals; D001792:Blood Platelets / Q000502:physiology*; D055252:Cell-Derived Microparticles / Q000502:physiology*; D002642:Chick Embryo; D049033:Chorioallantoic Membrane / Q000098:blood supply*; D006801:Humans; D018919:Neovascularization, Physiologic / Q000187:drug effects*; D010316:Particle Size