[Pharmacokinetic study of recombinant human acidic fibroblast growth factor in rabbits by skin external use].
OBJECTIVE
To investigate the pharmacokinetic characteristics of recombinant human acidic fibroblast growth factor (rhaFGF) after external use in rabbits.


METHODS
125I-rhaFGF 180 U.cm-2 was daubed to normal skin and scathed skin in rabbits. The radioactivity and paper chromatography were used to determine the 125I-concentrations and distribution in plasma and organs at different times.


RESULTS
The plasma concentration of 125I-rhaFGF increased rapidily, and reach peak plasma level (73.03 pg.mL-1) thirty minutes after administration. Then the concentration of 125I-rhaFGF decreased quickly after thirty minutes, and approached to zero after three hours. Highest radioactivity accumulated in the skin, followed by kidney, lowest in the brain 96 h after administration.


CONCLUSIONS
rhaFGF can not be absorbed from the normal skin, whereas a small amount of rhaFGF can be absorbed through scathed skin. The t1/2 of rhaFGF in plasma was very short. Cumulative effect of rhaFGF was not observed. Absorbed rhaFGF showed high affinity to skin, and can be distributed to skin far from the site of administration.
Li
Xiao-kun
XK
Biopharmaceutical Research and Development Center, Jinan University, Guangzhou 510632, China.
Xu
Hua
H
Zhao
Wen
W
Zheng
Qing
Q
Huang
Ya-dong
YD
Wu
Xiao-ping
XP
Liu
Chang-zheng
CZ
D000279:Administration, Cutaneous; D000818:Animals; D005260:Female; D016220:Fibroblast Growth Factor 1 / Q000008:administration & dosage / Q000493:pharmacokinetics*; D008297:Male; D011817:Rabbits; D011994:Recombinant Proteins / Q000008:administration & dosage / Q000493:pharmacokinetics; D012867:Skin / Q000293:injuries / Q000378:metabolism; D012869:Skin Absorption; D014018:Tissue Distribution
D011994:Recombinant Proteins; D016220:Fibroblast Growth Factor 1