Graybill J R, Najvar L K, Montalbo E M, Barchiesi F J, Luther M F, Rinaldi M G
The University of Texas Health Science Center at San Antonio, 78284, USA.
Antimicrob Agents Chemother. 1998 Jan;42(1):151-3. doi: 10.1128/AAC.42.1.151.
BALB/c nu/+ immunocompetent and athymic (nu/nu) mice were infected intravenously with yeast cells of Histoplasma capsulatum. Mice were either given water (controls) intraperitoneally (i.p.) or given MK-991 i.p. once daily or twice daily. Protection was measured as prolonged survival or reduction in tissue counts. MK-991 was protective in immunocompetent mice, prolonging survival and reducing counts in spleen and livers at a dose as low as 0.05 mg/kg of body weight/day. MK-991 was modestly effective in athymic mice at a higher dose, 5 mg/kg/day. These studies suggest that MK-991 may be appropriate for clinical development in histoplasmosis.
将具有免疫活性的BALB/c裸合(nu/+)小鼠和无胸腺(nu/nu)小鼠通过静脉注射荚膜组织胞浆菌的酵母细胞进行感染。小鼠腹腔内(i.p.)要么给予水(作为对照),要么每天一次或每天两次腹腔内给予MK - 991。通过延长生存期或减少组织菌数来衡量保护作用。MK - 991对具有免疫活性的小鼠具有保护作用,在低至0.05毫克/千克体重/天的剂量下可延长生存期并减少脾脏和肝脏中的菌数。MK - 991在较高剂量(5毫克/千克/天)时对无胸腺小鼠有一定效果。这些研究表明,MK - 991可能适用于组织胞浆菌病的临床开发。