Homeobox Genes in the Developing Mouse Brain

Vollmer, Jean-Yves; Clerc, Roger G.

doi:10.1046/j.1471-4159.1998.71010001.x

Cited by 34 publications

(18 citation statements)

References 97 publications

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“…CDP/Cux RNA is expressed in the brain and all major internal organs except in the adult liver (37). In addition, many homeobox-containing genes have been shown to play essential roles in the developing mouse brain (44). However, hematoxylin-and-eosin-stained sections revealed no histological abnormalities in the major internal organs or the brains of ⌬C Ϫ/Ϫ mice (data not shown).…”

Section: Resultsmentioning

confidence: 93%

Genetic Ablation of the CDP/Cux Protein C Terminus Results in Hair Cycle Defects and Reduced Male Fertility

Luong

Meijden

Xing

et al. 2002

Molecular and Cellular Biology

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Section: Resultsmentioning

confidence: 93%

Genetic Ablation of the CDP/Cux Protein C Terminus Results in Hair Cycle Defects and Reduced Male Fertility

Luong

Meijden

Xing

et al. 2002

Molecular and Cellular Biology

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“…PRC1 complexes are regulators of gene expression, and the identification of target genes is one of the key issues to understand the involvement of PRC1 in different cellular processes. The most intense target genes studied are Hox genes, although it is a general view that they are not expressed more rostral than the hindbrain (Vollmer and Clerc, 1998). However, a growing body of evidence suggests that some Hox genes continue to be expressed in the mature nervous system and in the forebrain (Odenwald et al, 1987;Sanlioglu et al, 1998;McClintock et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

Differential expression of polycomb repression complex 1 (PRC1) members in the developing mouse brain reveals multiple complexes

Vogel

Stoykova

Gruß

2006

Developmental Dynamics

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“…There are many homeobox genes that are known to be expressed in developing brains and/or mature nervous systems in mice (32). Several Hox genes are expressed in specific rhombomeres and are required for the identification of neuromeres.…”

mentioning

confidence: 99%

Neonatal Lethality, Dwarfism, and Abnormal Brain Development in Dmbx1 Mutant Mice

Ohtoshi

Behringer

2004

Molecular and Cellular Biology

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Dmbx1 encodes a paired-like homeodomain protein that is expressed in developing neural tissues during mouse embryogenesis. To elucidate the in vivo role of Dmbx1, we generated two Dmbx1 mutant alleles. Dmbx1 ؊ lacks the homeobox and Dmbx1 z is an insertion of a lacZ reporter gene. Dmbx1 z appears to be a faithful reporter of Dmbx1 expression during embryogenesis and after birth. Dmbx1-lacZ expression was detected in the superior colliculus, cerebellar nuclei, and subpopulations of the medulla oblongata and spinal cord. Some Dmbx1 homozygous mutant mice died during the neonatal period, while others survived to adulthood; however, their growth was impaired. Both heterozygous and homozygous mutant offspring from Dmbx1 homozygous mutant females exhibited a low survival rate and poor growth. However, even wild-type pups fostered onto Dmbx1 homozygous mutant females grew poorly, suggesting a Dmbx1-dependent nursing defect. Dmbx1 mutant mice had an aberrant Dmbx1-lacZ expression pattern in the nervous system, indicating that they had abnormal brain development. These results demonstrate that Dmbx1 is required for postnatal survival, growth, and brain development.The central nervous system (CNS) is derived from the neural plate, a tissue that arises from the anterior epiblast of the mouse gastrula (28). Complex morphogenetic processes transform the relatively flat neural plate into the neural tube. By the time the neural tube is formed, it has differentiated morphological segments along the anterior-posterior axis and is divided into several compartments called neuromeres. The neuromeres in the forebrain and hindbrain comprise six prosomeres and eight rhombomeres, respectively. This segmentation is induced and maintained by the expression of segment-specific genes, including homeobox genes that encode homeodomain-containing transcription factors.The homeodomain is a conserved DNA-binding motif that consists of ϳ60 amino acid residues. The homeoproteins are divided into two groups, clustered and dispersed, according to how they are distributed on the chromosomes. Mammals have four Hox gene clusters. Homeobox genes belonging to the dispersed class are further divided into several subclasses, primarily by the homeodomain sequences.There are many homeobox genes that are known to be expressed in developing brains and/or mature nervous systems in mice (32). Several Hox genes are expressed in specific rhombomeres and are required for the identification of neuromeres. In the forebrain, several dispersed-class homeobox genes that belong to Dlx, Emx, Nkx, and paired-like subclasses are expressed in region-specific patterns. Based on the restricted expression pattern of regulatory genes and morphological observations, a prosomeric model of forebrain patterning was proposed (27). The embryonic midbrain is a compartment structure located between the forebrain and hindbrain and can be considered one of the neuromeres. Otx genes are expressed in the embryonic midbrain and mark the midbrain-hindbrain boundary.To date, Ͼ30 paired-like h...

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Homeobox Genes in the Developing Mouse Brain

Cited by 34 publications

References 97 publications

Genetic Ablation of the CDP/Cux Protein C Terminus Results in Hair Cycle Defects and Reduced Male Fertility

Genetic Ablation of the CDP/Cux Protein C Terminus Results in Hair Cycle Defects and Reduced Male Fertility

Differential expression of polycomb repression complex 1 (PRC1) members in the developing mouse brain reveals multiple complexes

Neonatal Lethality, Dwarfism, and Abnormal Brain Development in Dmbx1 Mutant Mice

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