Biomaterial Database

Development of the mouse blastocyst after actinomycin D treatment. 1975

P S Bell, and R H Glass

Mouse blastocysts were incubated in vitro with actinomycin D in concentrations of 10-1 to 10-5 mug/ml. After transfer to recipient animals, there was a moderate but significant decrease in implantations at 10-minus 1 to 10-minus 3 and 10-minus 5. There was a severe inhibition of subsequent development at concentrations of 10-minus 1 and 10-minus 2. One of 49 fetuses which developed after actinomycin D treatment had a major malformation; there was one major and one minor abnormality among 95 control fetuses. It is suggested that most of the RNA or protein required to effect implantation is synthesized or coded for prior to the blastocyst state. The moderate but significant decrease in implantations found after actinomycin D treatment at this stage may reflect the ability of the drug to reduce cell adhesiveness. This study confirms the impression that the preimplantation embryo is relatively impervious to teratogenic agents, even one as potent as actinomycin D.

UI	MeSH Term	Description	Entries
D007866	Leg	The inferior part of the lower extremity between the KNEE and the ANKLE.	Legs
D010064	Embryo Implantation	Endometrial implantation of EMBRYO, MAMMALIAN at the BLASTOCYST stage.	Blastocyst Implantation,Decidual Cell Reaction,Implantation, Blastocyst,Nidation,Ovum Implantation,Blastocyst Implantations,Decidual Cell Reactions,Embryo Implantations,Implantation, Embryo,Implantation, Ovum,Implantations, Blastocyst,Implantations, Embryo,Implantations, Ovum,Nidations,Ovum Implantations
D011247	Pregnancy	The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.	Gestation,Pregnancies
D001755	Blastocyst	A post-MORULA preimplantation mammalian embryo that develops from a 32-cell stage into a fluid-filled hollow ball of over a hundred cells. A blastocyst has two distinctive tissues. The outer layer of trophoblasts gives rise to extra-embryonic tissues. The inner cell mass gives rise to the embryonic disc and eventual embryo proper.	Embryo, Preimplantation,Blastocysts,Embryos, Preimplantation,Preimplantation Embryo,Preimplantation Embryos
D002448	Cell Adhesion	Adherence of cells to surfaces or to other cells.	Adhesion, Cell,Adhesions, Cell,Cell Adhesions
D003609	Dactinomycin	A compound composed of a two CYCLIC PEPTIDES attached to a phenoxazine that is derived from STREPTOMYCES parvullus. It binds to DNA and inhibits RNA synthesis (transcription), with chain elongation more sensitive than initiation, termination, or release. As a result of impaired mRNA production, protein synthesis also declines after dactinomycin therapy. (From AMA Drug Evaluations Annual, 1993, p2015)	Actinomycin,Actinomycin D,Meractinomycin,Cosmegen,Cosmegen Lyovac,Lyovac-Cosmegen,Lyovac Cosmegen,Lyovac, Cosmegen,LyovacCosmegen
D004622	Embryo, Mammalian	The entity of a developing mammal (MAMMALS), generally from the cleavage of a ZYGOTE to the end of embryonic differentiation of basic structures. For the human embryo, this represents the first two months of intrauterine development preceding the stages of the FETUS.	Embryonic Structures, Mammalian,Mammalian Embryo,Mammalian Embryo Structures,Mammalian Embryonic Structures,Embryo Structure, Mammalian,Embryo Structures, Mammalian,Embryonic Structure, Mammalian,Embryos, Mammalian,Mammalian Embryo Structure,Mammalian Embryonic Structure,Mammalian Embryos,Structure, Mammalian Embryo,Structure, Mammalian Embryonic,Structures, Mammalian Embryo,Structures, Mammalian Embryonic
D005124	Eye Abnormalities	Congenital absence of or defects in structures of the eye; may also be hereditary.	Abnormalities, Eye,Abnormality, Eye,Eye Abnormality
D005260	Female		Females
D005333	Fetus	The unborn young of a viviparous mammal, in the postembryonic period, after the major structures have been outlined. In humans, the unborn young from the end of the eighth week after CONCEPTION until BIRTH, as distinguished from the earlier EMBRYO, MAMMALIAN.	Fetal Structures,Fetal Tissue,Fetuses,Mummified Fetus,Retained Fetus,Fetal Structure,Fetal Tissues,Fetus, Mummified,Fetus, Retained,Structure, Fetal,Structures, Fetal,Tissue, Fetal,Tissues, Fetal