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In vivo dominant lethal effect of pyrimethamine in male mouse germ cells. 1999

U Egeli, and N Aydemir, and G Akpinar, and C Cimen, and E Ergül, and G Tutar, and B Tunca, and R Bilaloğlu
Department of Medical Biology, Faculty of Medicine, Faculty of Science, University of Uludağ, Görükle/Bursa, Kocaeli, Turkey.

Pyrimethamine is used for treatment of malaria and toxoplasmosis. The embryotoxicity and clastogenicity of pyrimethamine is known and our aim was to investigate its dominant lethal effect in vivo. For this purpose, we used three groups of Swiss-albino male mice and a control group. We injected males with doses of 16, 32 or 64 mg/kg pyrimethamine and housed them with 10 females/male for each mating interval. Females were sacrificed and their uteri were evaluated for dominant lethality. As a result of this study we found that pyrimethamine induced dominant lethal mutations in the third, fourth and sixth weeks at the 64 mg/kg dose level, without the effect being dose-dependent. We conclude that pyrimethamine is a suspected germ cell mutagen.

UI MeSH Term Description Entries
D008297 Male Males
D009154 Mutation Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations. Mutations
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
D011739 Pyrimethamine One of the FOLIC ACID ANTAGONISTS that is used as an antimalarial or with a sulfonamide to treat toxoplasmosis. Chloridin,Daraprim,Malocide,Tindurine
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
D005260 Female Females
D005799 Genes, Dominant Genes that influence the PHENOTYPE both in the homozygous and the heterozygous state. Conditions, Dominant Genetic,Dominant Genetic Conditions,Genetic Conditions, Dominant,Condition, Dominant Genetic,Dominant Gene,Dominant Genes,Dominant Genetic Condition,Gene, Dominant,Genetic Condition, Dominant
D005804 Genes, Lethal Genes whose loss of function or gain of function MUTATION leads to the death of the carrier prior to maturity. They may be essential genes (GENES, ESSENTIAL) required for viability, or genes which cause a block of function of an essential gene at a time when the essential gene function is required for viability. Alleles, Lethal,Allele, Lethal,Gene, Lethal,Lethal Allele,Lethal Alleles,Lethal Gene,Lethal Genes
D005854 Germ Cells The reproductive cells in multicellular organisms at various stages during GAMETOGENESIS. Gamete,Gametes,Germ-Line Cells,Germ Line,Cell, Germ,Cell, Germ-Line,Cells, Germ,Cells, Germ-Line,Germ Cell,Germ Line Cells,Germ Lines,Germ-Line Cell
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia

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