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- W2316572351 abstract "This study evaluated the effects of the human serine protease inhibitor alpha-1-antitrypsin (AAT) on in vitro excystation and infectivity of Cryptosporidium parvum. Excystation was monitored at 37 C in RPMI medium in the presence of 0, 100, 500, or 1,000 micrograms/ml AAT. AAT significantly inhibited (P < 0.05) excystation of bleach-decontaminated oocysts in a concentration-dependent manner at incubation intervals from 15 to 90 min but did not alter the excystation dynamics of unbleached oocysts. Bleach-treated oocysts, suspended in RPMI containing 0, 1, 10, 100, 500, or 1,000 micrograms/ml AAT, were used to inoculate bovine fallopian tube epithelial (BFTE) cell monolayers. Alternately, sporozoites, excysted at 37 degrees C and collected by filtration, were used to inoculate BFTE cells under the same conditions. The mean number of parasites counted in AAT-treated, oocyst-inoculated cells was significantly less (P < 0.01) than control mean values at 24 and 48 hr post-inoculation (PI); longer PI intervals (72-96 hr) exhibited a decreased inhibitory effect. AAT did not inhibit parasite infection when cultures were inoculated with C. parvum sporozoites. The findings of this study show that the anticryptosporidial potential of AAT is primarily associated with an antagonistic effect on oocyst excystation." @default.
- W2316572351 created "2016-06-24" @default.
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- W2316572351 date "1997-08-01" @default.
- W2316572351 modified "2023-10-18" @default.
- W2316572351 title "Antagonistic Effect of Human Alpha-1-Antitrypsin on Excystation of Cryptosporidium parvum Oocysts" @default.
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- W2316572351 doi "https://doi.org/10.2307/3284264" @default.
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