Slit1

..Here we report the identification of three Slit homologues in the mouse. We demonstrate that the mouse SLIT1 protein can bind ROBO1, a transmembrane receptor implicated in axon guidance...

..These results indicate that the dorsal-to-ventral segregation of OSN axons are not solely defined by the location of OSNs within the OE but also relies on axon guidance cues...

..Interestingly, a similar increase in proliferation was observed in Slit1(-/-)/Slit2(-/-) mutant mice, suggesting that cell division is influenced by Slit-Robo signaling mechanisms...

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..Recently, it has also been shown that the axon guidance molecule Slit1 and its receptor Robo2 control the dorsoventral segregation of ORN axons as they are projecting to the OB...

..Mice deficient in Slit2 and, even more so, mice deficient in both Slit1 and Slit2 show significant axon guidance errors in a variety of pathways, including corticofugal, callosal, and ..

..b>Slit1 and Slit2, two known chemorepellents for developing axons, can mimic this effect...

..Previous analysis of Slit1;Slit2 double mutant spinal cords failed to reveal a defect in commissural axon guidance...

..Thus, our data establish a novel role for SLIT2 as an adhesive cue, acting in parallel with NTN1 to generate cell boundaries along ducts during bi-layered tube formation...

..Here, we show that slit1 and slit2, known chemorepellents for RGC axons expressed in specific regions of the diencephalon and telencephalon,..

..These results reveal discrete and complementary roles for secreted semaphorins and slits in axonal targeting, fasciculation, and segregation of olfactory sensory neuron projections...

..To determine the role of Slit proteins in RGC axon guidance, we disrupted Slit1 and Slit2, two of three known mouse Slit genes...

..It is known that the septum secretes Slit1 and Slit2 which repel olfactory axons in vitro and that in Slit1-/-;Slit2-/- mutant mice, the LOT is profoundly ..

..Together, our studies demonstrate a central role for Rnx and Tlx-1 in the development of two major classes of relay sensory neurons, somatic and visceral...

..Mice deficient in Slit2 or, even more so, in both Slit1 and Slit2 have defects in multiple axonal pathways, including corticofugal, thalamocortical, and callosal ..

..A comparison of the expression patterns of Slit2 and retinal axon trajectories suggests that slit2 acts as a short range repellent for retinal ganglion cell axons...

..demonstrate that the repulsive activity found in the basal telencephalon is maintained in mice deficient in both Slit1 and Slit2, suggesting that factors other than these are responsible for this activity...

..sensory arbors in vivo, because trigeminal sensory branching above the eye is reduced in Slit2;Slit3 double or Slit1,2,3 triple mutants...

..Using analysis of knock-out mice and in vitro assays, we found that, in the mammalian retina, Slit1 and Slit2, known chemorepellents for RGC axons, regulate distinct aspects of intraretinal pathfinding in different ..

..These results identify a mechanism for regulating Slit repulsion that helps choreograph the precise switch from attraction to repulsion at a key intermediate axonal target...

..Using in situ hybridization, we have determined the expression patterns of robo1,2 and slit1,2,3 in the mouse retina and in the region of the developing optic chiasm, a ventral midline structure in which ..

..Our results indicate that slit silences the attractive effects of netrin-1 and could participate in the correct ventral positioning of ION, stopping the migration when cell bodies reach the floor-plate...

..New neurons secrete the diffusible protein Slit1, whose receptor, Robo, is expressed on astrocytes...

..In this study, we investigated a possible role of Wnts and the planar cell polarity (PCP) pathway in this process...

..Robo1 and Robo2, also regulates precerebellar neuron behavior at the floor plate, we studied the phenotype of Slit1/2 and Robo1/2/3 compound mutants...

..Moreover, the migration defects observed in Hoxa2 and Hoxb2 mutant mice were phenocopied in compound Robo1;Robo2, Slit1;Slit2, and Robo2;Slit2 knockout animals, indicating that these guidance molecules act downstream of Hox genes to ..

..Our study reveals that subtle differences in the migration of conserved intermediate target neurons trigger large-scale changes in thalamic connectivity, and opens perspectives on Slit functions and the evolution of brain wiring...

..Together, these findings indicate that Msi1-mediated posttranscriptional regulation of Robo3 controls midline crossing of precerebellar neurons...

..These findings indicate a specific role for Nck2 in linking Robo activation to the cytoskeleton rearrangements that shape cortical neuron morphology...

..Moreover, absence of both Slit1 and Slit2 or Robo1 and Robo2 in mutant mouse embryos revealed aberrant TPOC trajectories, resulting in abnormal ..

..Particular Hs2st(-/-) and Hs6st1(-/-) phenotypes closely match those of Slit1(-/-) and Slit2(-/-) embryos respectively, suggesting possible functional relationships...

..9. We further show that NKX2.2 is necessary to induce the expression of Slit1 and Sulfatase 1 (Sulf1) in the vSC in a PAX6-independent manner...

..We propose that the spatiotemporal control of this tightly orchestrated network of genes participates in crucial aspects of PAA development...

..Robo1 and Robo2 are receptors for the midline repellents Slit1-Slit3, and upregulation of Robos in post-crossing axons allows expulsion from the floor plate and prevents ..

..Our results suggest that patterned Slit-Robo signaling may contribute to the control of oriented cell growth during chamber morphogenesis of the mammalian heart...

..As both factors affect floor plate development, control of commissural axon trajectories might be the underlying mechanism...

..The mdDA axons made significant pathfinding errors in Slit1/2 and Robo1/2 knockout mice, including spreading out in the diencephalon to form a wider tract...

..By contrast, the early patterning and development of motor neurons were not affected in the mutant spinal cord tissue...

..To our knowledge, this study is one of the first to link defects in commissural axon guidance with specific cellular and behavioral phenotypes...

..Together, these results identify Robo-2 as a receptor that controls the targeting of basal VSN axons to the posterior AOB...

..Previously, we have shown that the inhibitory guidance molecules, Slit1 and Slit2, regulate two distinct aspects of intraretinal axon guidance in a region-specific manner...

..Thus, we show for the first time that Robo1 interacts with Nrp1 to modulate semaphorin signaling in the developing forebrain and direct the migration of interneurons through the subpallium and into the cortex...

..The inability of the striatum to extend axons is also observed in vitro. These results show that OL-pc is essential for both elongation of striatal axons and patterning of the putative guidance cues for thalamocortical projections...

..In vitro assays show that Slit1-Slit3 chemorepel VNO axons, suggesting that basal axons are guided to the posterior AOB due to chemorepulsive ..

..We conclude Slit/Robo are expressed in temporo-spatially adjacent domains suggesting interactive roles in pulmonary bronchiolar development...

..We investigated the developmental fate of the signaling center using the recently characterized Slit1 enamel knot marker as a lineage tracer during morphogenesis of the first molar and crown calcification in the ..

..In addition, we propose that chemotactic guidance cues superimposed over the permissive corridor facilitate efficient dorsal migration of MGE cells...

The vertebrate Slit gene family currently consists of three members; Slit1, Slit2 and Slit3...

..the role of Slit proteins in mediating olfactory axon guidance in vivo using mice with targeted deletions in the Slit1 and Slit2 genes...

..Taken together, these results show that distinct cues located in the cortico-striatal boundary restrict cells in the dorsal and ventral telencephalon...

..In search of novel molecules involved in tooth morphogenesis, we analyzed mRNA expression of Slit1, -2 and -3, earlier characterized as secreted signals needed for axonal pathfinding and their two receptors Robo1 ..

We report the cloning and expression during limb development of the chicken Slit1, Slit2, and Slit3 ligands, and Robo1 and Robo2 receptor genes...

..The temporal and spatial distribution of Slit and Robo mRNAs indicate that these genes may direct the functional organization and differentiation of fetal lung mesenchyme...

..Our study thus reveals an unanticipated heterogeneity in the genetic mechanisms specifying the identity of neocortical projection neurons...

..Instead, MB axons are splayed and grow towards the midline. Slit1 and Slit2, which code for secreted molecules that induce the repulsion of ROBO1-producing axons, are expressed in ..

..the expression of ErbB4 (v-erb-a erythroblastic leukemia viral oncogene homolog 4), Robo2 (roundabout homolog 2), Slit1 (slit homolog 1), and PK2 (prokineticin 2), which have all been shown to play essential roles in this migration.

..In addition, the expression of Sema6A is aberrantly upregulated. Together, these findings reveal a dual role for Lhx2, in the OB as well as in the lateral telencephalon, for establishing the LOT projection...

..Surprisingly, even though gli2 mutants lack a FP, slit1-3 mRNA and their receptors (Robo1/2) are expressed in a wild-type-like manner...

..Our findings suggest that activation of cell polarity signaling and positioning of the centrosome ahead of the nucleus are important steps in repolarization in response to guidance cues...

..These findings suggest that signals from olfactory sensory neurons contribute to the proper formation of the olfactory bulb...

..Results suggest that polarized epithelial cells contribute important vectorial information for guidance of young, migrating neurons...

..Vax1 therefore regulates the guidance properties of a set of anterior midline cells that orchestrate axon trajectories in the developing mammalian forebrain...

..Genetic tests of Slit1 and Slit2, and the Slit receptors Robo1 and Robo2 were carried out in mutant mice...

..Furthermore, analysis of the expression of candidate molecules in the basal telencephalon and hypothalamus of Nkx2-1 mutants suggests that Slit2 contributes to this activity...

..astrocytes (WMA) in the spinal cord, which can be distinguished by the combinatorial expression of Reelin and Slit1. These astrocyte subtypes derive from progenitor domains expressing the homeodomain transcription factors Pax6 and ..

..Human ES cell work will be performed using ES01, 02, 03, 04, 05 & 06 listed on the NIH ES cell line registry. ..

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