Biomaterial Database

[The effects of the white gene on coat pigmentation in mouse aggregation chimeras]. 1993

B V Koniukhov, and B N Kindiakov, and N A Malinina

We obtained eight Mi(wh)/+<==>Mi(wh)/Mi(wh) chimeras using embryos of two mutant substrains of Mi(wh)/Mi(wh) mice with different isozymes Gpi-1(aa) and Gpi-1(bb). Chimerism was determined by the mosaicism of retinal pigment epithelium and electrophoretically different variants of glucose phosphate isomerase. The patterns of coat pigmentation in all chimeras were similar to those in Mi(wh)/+ heterozygotes. Despite the high proportion of the parental Mi(wh)/Mi(wh) component in three chimeras, the phenotype of their coat pigmentation was also similar with that of Mi(wh)/+ mice. The chimeras lacked mosaic-pigmented hairs. These data suggest presence only one cell population of Mi(wh)/+ melanoblasts that actively proliferate and colonize almost all forming hair follicles. Hence, the proliferation and/or differentiation of Mi(wh)/+ melanoblasts is not suppressed in the Mi(wh)/Mi(wh) dermis and epidermis. The Mi(wh) gene acting in melanoblasts leads to the block of their proliferation at the early stages of development in the homozygotes.

UI	MeSH Term	Description	Entries
D008544	Melanocytes	Mammalian pigment cells that produce MELANINS, pigments found mainly in the EPIDERMIS, but also in the eyes and the hair, by a process called melanogenesis. Coloration can be altered by the number of melanocytes or the amount of pigment produced and stored in the organelles called MELANOSOMES. The large non-mammalian melanin-containing cells are called MELANOPHORES.	Melanocyte
D008810	Mice, Inbred C57BL	One of the first INBRED MOUSE STRAINS to be sequenced. This strain is commonly used as genetic background for transgenic mouse models. Refractory to many tumors, this strain is also preferred model for studying role of genetic variations in development of diseases.	Mice, C57BL,Mouse, C57BL,Mouse, Inbred C57BL,C57BL Mice,C57BL Mice, Inbred,C57BL Mouse,C57BL Mouse, Inbred,Inbred C57BL Mice,Inbred C57BL Mouse
D008817	Mice, Mutant Strains	Mice bearing mutant genes which are phenotypically expressed in the animals.	Mouse, Mutant Strain,Mutant Mouse Strain,Mutant Strain of Mouse,Mutant Strains of Mice,Mice Mutant Strain,Mice Mutant Strains,Mouse Mutant Strain,Mouse Mutant Strains,Mouse Strain, Mutant,Mouse Strains, Mutant,Mutant Mouse Strains,Mutant Strain Mouse,Mutant Strains Mice,Strain Mouse, Mutant,Strain, Mutant Mouse,Strains Mice, Mutant,Strains, Mutant Mouse
D009030	Mosaicism	The occurrence in an individual of two or more cell populations of different chromosomal constitutions, derived from a single ZYGOTE, as opposed to CHIMERISM in which the different cell populations are derived from more than one zygote.
D010641	Phenotype	The outward appearance of the individual. It is the product of interactions between genes, and between the GENOTYPE and the environment.	Phenotypes
D010857	Pigment Epithelium of Eye	The layer of pigment-containing epithelial cells in the RETINA; the CILIARY BODY; and the IRIS in the eye.	Eye Pigment Epithelium
D002678	Chimera	An individual that contains cell populations derived from different zygotes.	Hybrids,Chimeras,Hybrid
D002999	Clone Cells	A group of genetically identical cells all descended from a single common ancestral cell by mitosis in eukaryotes or by binary fission in prokaryotes. Clone cells also include populations of recombinant DNA molecules all carrying the same inserted sequence. (From King & Stansfield, Dictionary of Genetics, 4th ed)	Clones,Cell, Clone,Cells, Clone,Clone,Clone Cell
D005796	Genes	A category of nucleic acid sequences that function as units of heredity and which code for the basic instructions for the development, reproduction, and maintenance of organisms.	Cistron,Gene,Genetic Materials,Cistrons,Genetic Material,Material, Genetic,Materials, Genetic
D005838	Genotype	The genetic constitution of the individual, comprising the ALLELES present at each GENETIC LOCUS.	Genogroup,Genogroups,Genotypes