{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T17:51:00Z","timestamp":1790790660414,"version":"4.1.0"},"reference-count":36,"publisher":"The Company of Biologists","issue":"22","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2004,11,15]]},"abstract":"<jats:p>In animals with binocular vision, retinal ganglion cell (RGC) axons from each eye sort in the developing ventral diencephalon to project to ipsi- or contralateral targets, thereby forming the optic chiasm. Ipsilaterally projecting axons arise from the ventrotemporal (VT) retina and contralaterally projecting axons primarily from the other retinal quadrants. The winged helix transcription factor Foxd1 (previously known as BF-2, Brain Factor 2) is expressed in VT retina, as well as in the ventral diencephalon during the formation of the optic chiasm. We report here that in embryos lacking Foxd1,both retinal development and chiasm morphogenesis are disrupted. In the Foxd1 deficient retina, proteins designating the ipsilateral projection, such as Zic2 and EphB1, are missing, and the domain of Foxg1 (BF-1) expands from nasal retina into the VT crescent. In retina-chiasm co-cultures, VT RGCs from Foxd1 deficient retina are not repulsed by chiasm cells, and in vivo many VT RGCs aberrantly project contralaterally. However, even though the ipsilateral program is lost in the retina, a larger than normal uncrossed component develops in Foxd1 deficient embryos. Chiasm defects include axon stalling in the chiasm and a reduction in the total number of RGCs projecting to the optic tract. In addition, in the Foxd1 deficient ventral diencephalon, Foxg1 invades the Foxd1 domain, Zic2 and Islet1 expression are minimized, and Slit2 prematurely expands, changes that could contribute to axon projection errors. Thus, Foxd1 plays a dual role in the establishment of the binocular visual pathways: first, in specification of the VT retina, acting upstream of proteins directing the ipsilateral pathway; and second, in the patterning of the developing ventral diencephalon where the optic chiasm forms.<\/jats:p>","DOI":"10.1242\/dev.01431","type":"journal-article","created":{"date-parts":[[2004,10,28]],"date-time":"2004-10-28T01:58:17Z","timestamp":1098928697000},"page":"5727-5739","source":"Crossref","is-referenced-by-count":106,"title":["Foxd1 is required for proper formation of the optic chiasm"],"prefix":"10.1242","volume":"131","author":[{"given":"Eloi\u0301sa","family":"Herrera","sequence":"first","affiliation":[{"name":"Departments of Pathology, Anatomy and Cell Biology and Center for Neurobiology and Behavior, Columbia University, College of Physicians and Surgeons, 630 West 168th Street, New York, NY 10032, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Riva","family":"Marcus","sequence":"additional","affiliation":[{"name":"Departments of Pathology, Anatomy and Cell Biology and Center for Neurobiology and Behavior, Columbia University, College of Physicians and Surgeons, 630 West 168th Street, New York, NY 10032, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Suzanne","family":"Li","sequence":"additional","affiliation":[{"name":"Cell Biology Program, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10021, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Scott E.","family":"Williams","sequence":"additional","affiliation":[{"name":"Departments of Pathology, Anatomy and Cell Biology and Center for Neurobiology and Behavior, Columbia University, College of Physicians and Surgeons, 630 West 168th Street, New York, NY 10032, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lynda","family":"Erskine","sequence":"additional","affiliation":[{"name":"Departments of Visual Science and Molecular Genetics, Institute of Ophthalmology, University College London, London EC1V 9EL, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eseng","family":"Lai","sequence":"additional","affiliation":[{"name":"Cell Biology Program, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10021, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carol","family":"Mason","sequence":"additional","affiliation":[{"name":"Departments of Pathology, Anatomy and Cell Biology and Center for Neurobiology and Behavior, Columbia University, College of Physicians and Surgeons, 630 West 168th Street, New York, NY 10032, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"237","reference":[{"key":"2021042612050965400_REF1","doi-asserted-by":"crossref","unstructured":"Brown, A., Yates, P. 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