Related Experiment Video
Updated: Jul 7, 2026
07:40
Dissection of the Auditory Bulla in Postnatal Mice: Isolation of the Middle Ear Bones and Histological Analysis
Published on: January 4, 2017
Homeobox genes in vertebrate forebrain development and disease
1Department of Biochemistry & Medical Genetics; Institute of Cardiovascular Sciences, St. Boniface General Hospital Research Centre, Winnipeg, Manitoba, Canada.
Clinical Genetics
|February 5, 2008
Summary
Homeobox genes are crucial for forebrain development, regulating patterning and neuronal differentiation. Mutations in these developmental genes can lead to neurological disorders in humans.
Area of Science:
- Developmental Biology
- Neuroscience
- Genetics
Background:
- Homeobox genes are essential transcription factors regulating embryonic development.
- Distinct homeobox gene expression patterns define developing forebrain regions in mice and humans.
- These genes are critical for forebrain patterning along axes and neuronal subtype differentiation.
Purpose of the Study:
- To review homeobox genes involved in mouse forebrain development.
- To discuss their identification, expression, function, and targets.
- To highlight the link between these genes and human neurological disorders.
Main Methods:
- Review of literature on homeobox gene function in forebrain development.
- Analysis of expression patterns, loss- and gain-of-function models.
- Examination of confirmed transcriptional targets.
Main Results:
- Homeobox genes control forebrain regional specification, patterning, and neuronal differentiation.
- Mutations in specific homeobox genes disrupt inhibitory interneuron development.
- Several homeobox genes are implicated in human neurological conditions like mental retardation and epilepsy.
Conclusions:
- Homeobox genes are indispensable for proper forebrain development and neuronal function.
- Dysregulation of homeobox gene activity contributes to congenital neurological diseases.
- Further research may uncover more homeobox genes linked to central nervous system disorders.
Related Concept Videos
01:33Pleiotropy
Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
02:33Hedgehog Signaling Pathway
The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...
01:51Determination
During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In contrast, determination...