EFFECTS OF DOSE, PH AND OSMOLARITY ON INTRANASAL ABSORPTION OF RECOMBINANT-HUMAN-ERYTHROPOIETIN IN RATS

被引:0
作者
SHIMODA, N [1 ]
MAITANI, Y [1 ]
MACHIDA, Y [1 ]
NAGAI, T [1 ]
机构
[1] CHUGAI PHARMACEUT CO LTD, DEPT BUSINESS COORDINAT, DIV DEV & TECHNOL, KITA KU, TOKYO 115, JAPAN
关键词
ERYTHROPOIETIN; INTRANASAL ADMINISTRATION; GLYCOPROTEIN CIRCULATING RETICULOCYTE; BIOAVAILABILITY;
D O I
暂无
中图分类号
R9 [药学];
学科分类号
1007 ;
摘要
The effects of dose, pH and osmolarity on the intranasal absorption of a recombinant human erythropoietin (rEPO) solution were studied in male Wistar rats, The intranasal administration of rEPO was evaluated by measuring percentage circulating reticulocytes of red blood cells on a stained blood smear (smear method), and also by measuring residual circulating reticulocyte counts using a microcell counter (sysmex method), Both results suggest that rEPO solution was absorbed through the nasal mucosa of rats without enhancers after a single intranasal administration, The pharmacological availabilities of rEPO after intranasal administration compared with intravenous administration were about 7% and 4%, when estimated by smear method and sysmex method, respectively, The pharmacological activity was enhanced in low pH and hypotonic mannitol solution.
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收藏
页码:734 / 739
页数:6
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