PMID- 11256751 OWN - NLM STAT- MEDLINE DCOM- 20010621 LR - 20191104 IS - 0940-2993 (Print) IS - 0940-2993 (Linking) VI - 52 IP - 6 DP - 2001 Feb TI - Apoptosis in mouse fetuses from dams exposed to T-2 toxin at different days of gestation. PG - 493-501 AB - T-2 toxin (2 mg/kg b.w.) was orally inoculated to pregnant mice at gestational day (GD) 8.5, 9.5, 10.5, 11.5, 12.5, 13.5, 14.5, 15.5 and GD 16.5, respectively, and the fetuses were examined 24 hours later. The number and region of pyknotic or karyorrhectic cells varied according to inoculation date. In the GD 13.5-subgroup, a moderate to high number of pyknotic or karyorrhectic neuronal cells were observed in the central nervous system, peri-ventricular zone to subventricular zone, and pyknosis or karyorrhexis were also observed in a small number of chondroblasts and chondrocytes. In the GD 16.5-subgroup, a moderate to high number of pyknotic or karyorrhectic cells were observed in the thymus and renal subcapsular parenchyma. The nuclei of these pyknotic or karyorrhectic cells were strongly stained by the terminal deoxy nucleotidyl transferase (TdT)-mediated dUTP-digoxigenin nick end labeling method widely used for the in situ detection of apoptotic nuclei. In addition, a few fetuses from dams which were given T-2 toxin at GD 13.5 or GD 14.5 and killed at GD 17.5 showed skeletal abnormalities such as wavy ribs and short scapula. From the present findings and the well known fact that T-2 toxin readily crosses the rat placenta, it seems that T-2 toxin-induced apoptosis in the developing mouse fetuses might be a direct effect of T-2 toxin on fetuses. FAU - Ishigami, N AU - Ishigami N AD - Department of Veterinary Pathology, Faculty of Agriculture, The University of Tokyo, Japan. aa77/45@mail.ecc.u-tokyo.ac.jp FAU - Shinozuka, J AU - Shinozuka J FAU - Katayama, K AU - Katayama K FAU - Nakayama, H AU - Nakayama H FAU - Doi, K AU - Doi K LA - eng PT - Journal Article PL - Germany TA - Exp Toxicol Pathol JT - Experimental and toxicologic pathology : official journal of the Gesellschaft fur Toxikologische Pathologie JID - 9208920 RN - 0 (Proliferating Cell Nuclear Antigen) RN - I3FL5NM3MO (T-2 Toxin) SB - IM MH - Abnormalities, Drug-Induced MH - Administration, Oral MH - Animals MH - Apoptosis/*drug effects MH - Bone and Bones/abnormalities/drug effects MH - Central Nervous System/abnormalities/drug effects MH - Embryonic and Fetal Development/drug effects MH - Female MH - Fetal Death/chemically induced MH - Fetal Weight/drug effects MH - Fetus/*drug effects/metabolism MH - Immunoenzyme Techniques MH - Mice MH - Mice, Inbred ICR MH - Pregnancy MH - Proliferating Cell Nuclear Antigen/metabolism MH - Ribs/abnormalities/drug effects MH - Scapula/abnormalities/drug effects MH - T-2 Toxin/administration & dosage/*toxicity MH - Time Factors EDAT- 2001/03/21 10:00 MHDA- 2001/06/22 10:01 CRDT- 2001/03/21 10:00 PHST- 2001/03/21 10:00 [pubmed] PHST- 2001/06/22 10:01 [medline] PHST- 2001/03/21 10:00 [entrez] AID - 10.1016/s0940-2993(01)80004-x [doi] PST - ppublish SO - Exp Toxicol Pathol. 2001 Feb;52(6):493-501. doi: 10.1016/s0940-2993(01)80004-x.