OBJECTIVE: To observe whether bFGF could cross the blood-labyrinth barrier (BLB) after intra-abdominal injection and to establish an experimental basis for its clinical applications. METHOD: Thirty guinea pigs were divided into three groups. Animals in group 1 were administered o I-bFGF, while animals in group 2 and 3 were administered 125 and saline, respectively, via intra-abdominal injection. The both cochlea, blood, liver, brain, thyroid gland and kidney were collected and weighted. A radioimmunoassay analyzer was employed to measure counts per minute (CPM) of each sample, and autoradiography was performed on both cochlea. RESULT: The CPM value of organ samples in the 125I group was higher than that in other groups, and radioactive grain was observed in cochlear samples of this group. In the 125I-bFGF group, blood demonstrated the highest CPM value, while cochlea and brain demonstrated the lowest CPM value, with no radioactive grain observed in cochlear samples. CONCLUSION bFGF has some difficulties in getting across BLB, so the way of bFGF application in clinics need further study.
Animals ; Autoradiography ; Cochlea ; cytology ; metabolism ; Fibroblast Growth Factor 2 ; administration & dosage ; Guinea Pigs ; Injections, Intraperitoneal ; Iodine Radioisotopes ; administration & dosage