Contraceptive effect of sperm-agglutinating monoclonal antibodies in rabbits

被引:34
作者
Castle, PE [1 ]
Whaley, KJ [1 ]
Hoen, TE [1 ]
Moench, TR [1 ]
Cone, RA [1 ]
机构
[1] JOHNS HOPKINS UNIV, THOMAS C JENKINS DEPT BIOPHYS, BALTIMORE, MD 21218 USA
关键词
D O I
10.1095/biolreprod56.1.153
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Immune infertility in humans correlates clinically with the presence of anti-sperm antibodies that trap (agglutinate) sperm tn semen and cervical mucus. To test whether sperm-agglutinating antibodies can be effective contraceptive agents, several mouse anti-rabbit sperm (MARS) sperm-agglutinating monoclonal antibodies (mAbs) were developed that rapidly and completely agglutinate sperm: MARS-M3 (IgM), MARS-G16 (IgG(3)), and MARS-G17 (IgG(3)). Contraceptive efficacy of these mAbs was tested by mixing the mAb with 0.1 ml semen (similar to 1/5 of a whole ejaculate) immediately before artificially inseminating rabbits paracervically. This paracervical dose of semen provided a rigorous test since it delivered several thousand times more fertilizing doses than does a human ejaculate. All of the mAbs were contraceptively effective, and MARS-G16 reduced the number of fetuses per animal by 88% and 95% with doses of 150 mu g and 2 mg, respectively. The contraceptive efficacy of the MARS mAbs in the rabbit suggests that human sperm-agglutinating mAbs may be effective agents for vaginal contraception in humans.
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页码:153 / 159
页数:7
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