Target type: biologicalprocess
The orderly movement of a neuroblast from one site to another, often during the development of a multicellular organism or multicellular structure. A neuroblast is any cell that will divide and give rise to a neuron. [CL:0000031, GOC:jc, PMID:15543145]
Neuroblast migration is a complex and highly regulated process that plays a critical role in the development of the nervous system. During embryogenesis, newly born neurons, known as neuroblasts, embark on a journey from their birthplace in the ventricular zone of the neural tube to their final destinations throughout the brain and spinal cord. This migration is essential for establishing the intricate circuitry of the nervous system, and disruptions in this process can lead to neurodevelopmental disorders. Neuroblast migration involves a series of coordinated steps, including:
1. **Cell polarity establishment:** Neuroblasts establish a distinct apical-basal polarity, with the apical surface facing the ventricular zone and the basal surface facing the outer regions of the brain. This polarity is crucial for directing migration along specific pathways.
2. **Adhesion and detachment:** Neuroblasts adhere to the ventricular zone through specialized cell-cell junctions, and they detach from these junctions to initiate migration.
3. **Locomotion:** Neuroblasts utilize specialized structures, such as the leading process (a filopodia-rich protrusion) and the trailing process (the rear portion of the cell), to navigate through the brain parenchyma. Locomotion can occur through a variety of mechanisms, including:
* **Tangential migration:** Neuroblasts migrate along the surface of the ventricular zone, parallel to the ventricular surface.
* **Radial migration:** Neuroblasts migrate perpendicularly to the ventricular surface, along radial glial fibers that act as scaffolding for migration.
4. **Guidance cues:** Neuroblast migration is directed by a complex interplay of guidance cues, including:
* **Chemoattractants:** These molecules attract neuroblasts towards specific destinations.
* **Chemorepellents:** These molecules repel neuroblasts from certain areas.
* **Contact guidance:** Neuroblasts can follow specific pathways guided by physical contact with other cells or extracellular matrix components.
5. **Integration into circuitry:** Once neuroblasts reach their target destination, they integrate into existing circuitry, forming synapses with other neurons and establishing functional neural networks.
Neuroblast migration is a finely tuned process that relies on a complex interplay of genetic, molecular, and environmental factors. Disruptions in this process can lead to a variety of neurodevelopmental disorders, including lissencephaly (smooth brain), microcephaly (small head), and epilepsy. Understanding the mechanisms of neuroblast migration is therefore essential for developing new therapies for these disorders.'
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| Protein | Definition | Taxonomy |
|---|---|---|
| Endothelin receptor type B | An endothelin receptor type B that is encoded in the genome of human. [PRO:WCB, UniProtKB:P24530] | Homo sapiens (human) |
| Gap junction alpha-1 protein | A gap junction alpha-1 protein that is encoded in the genome of human. [PRO:DNx, UniProtKB:P17302] | Homo sapiens (human) |
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| cyproheptadine | cyproheptadine : The product resulting from the formal oxidative coupling of position 5 of 5H-dibenzo[a,d]cycloheptene with position 4 of 1-methylpiperidine resulting in the formation of a double bond between the two fragments. It is a sedating antihistamine with antimuscarinic and calcium-channel blocking actions. It is used (particularly as the hydrochloride sesquihydrate) for the relief of allergic conditions including rhinitis, conjunctivitis due to inhalant allergens and foods, urticaria and angioedema, and in pruritic skin disorders. Unlike other antihistamines, it is also a seratonin receptor antagonist, making it useful in conditions such as vascular headache and anorexia. Cyproheptadine: A serotonin antagonist and a histamine H1 blocker used as antipruritic, appetite stimulant, antiallergic, and for the post-gastrectomy dumping syndrome, etc. | piperidines; tertiary amine | anti-allergic agent; antipruritic drug; gastrointestinal drug; H1-receptor antagonist; serotonergic antagonist |
| mianserin | mianserin : A dibenzoazepine (specifically 1,2,3,4,10,14b-hexahydrodibenzo[c,f]pyrazino[1,2-a]azepine) methyl-substituted on N-2. Closely related to (and now mostly superseded by) the tetracyclic antidepressant mirtazapinean, it is an atypical antidepressant used in the treatment of depression throughout Europe and elsewhere. Mianserin: A tetracyclic compound with antidepressant effects. It may cause drowsiness and hematological problems. Its mechanism of therapeutic action is not well understood, although it apparently blocks alpha-adrenergic, histamine H1, and some types of serotonin receptors. | dibenzoazepine | adrenergic uptake inhibitor; alpha-adrenergic antagonist; antidepressant; EC 3.4.21.26 (prolyl oligopeptidase) inhibitor; geroprotector; H1-receptor antagonist; histamine agonist; sedative; serotonergic antagonist |
| ritanserin | ritanserin : A thiazolopyrimidine that is 5H-[1,3]thiazolo[3,2-a]pyrimidin-5-one which is substituted at position 7 by a methyl group and at position 6 by a 2-{4-[bis(4-fluorophenyl)methylidene]piperidin-1-yl}ethyl group. A potent and long-acting seratonin (5-hydroxytryptamine, 5-HT) antagonist of the subtype 5-HT2 (Ki = 0.39 nM), it is used in the treatment of a variety of disorders including anxiety, depression and schizophrenia. It has little sedative action. Ritanserin: A selective and potent serotonin-2 antagonist that is effective in the treatment of a variety of syndromes related to anxiety and depression. The drug also improves the subjective quality of sleep and decreases portal pressure. | organofluorine compound; piperidines; thiazolopyrimidine | antidepressant; antipsychotic agent; anxiolytic drug; dopaminergic antagonist; EC 3.4.21.26 (prolyl oligopeptidase) inhibitor; serotonergic antagonist |
| spiperone | spiperone : An azaspiro compound that is 1,3,8-triazaspiro[4.5]decane which is substituted at positions 1, 4, and 8 by phenyl, oxo, and 4-(p-fluorophenyl)-4-oxobutyl groups, respectively. Spiperone: A spiro butyrophenone analog similar to HALOPERIDOL and other related compounds. It has been recommended in the treatment of SCHIZOPHRENIA. | aromatic ketone; azaspiro compound; organofluorine compound; piperidines; tertiary amino compound | alpha-adrenergic antagonist; antipsychotic agent; dopaminergic antagonist; psychotropic drug; serotonergic antagonist |
| kanamycin a | kanamycin : Kanamycin is a naturally occurring antibiotic complex from Streptomyces kanamyceticus that consists of several components: kanamycin A, the major component (also usually designated as kanamycin), and kanamycins B, C, D and X the minor components. Kanamycin: Antibiotic complex produced by Streptomyces kanamyceticus from Japanese soil. Comprises 3 components: kanamycin A, the major component, and kanamycins B and C, the minor components. | kanamycins | bacterial metabolite |
| 2-bromolysergic acid diethylamide | 2-bromolysergic acid diethylamide: was heading 1975-94 (see under LYSERGIC ACID DIETHYLAMIDE 1975-90); BROMO-LSD was see 2-BROMOLYSERGIC ACID DIETHYLAMIDE 1975-94; use LYSERGIC ACID DIETHYLAMIDE to search 2-BROMOLYSERGIC ACID DIETHYLAMIDE 1975-94; a serotonin antagonist | ||
| metergoline | metergoline : An ergoline alkaloid that is the N-benzyloxycarbonyl derivative of lysergamine. A 5-HT2 antagonist. Also 5-HT1 antagonist and 5-HT1D ligand. Has moderate affinity for 5-HT6 and high affinity for 5-HT7. Metergoline: A dopamine agonist and serotonin antagonist. It has been used similarly to BROMOCRIPTINE as a dopamine agonist and also for MIGRAINE DISORDERS therapy. | carbamate ester; ergoline alkaloid | dopamine agonist; geroprotector; serotonergic antagonist |
| butaclamol | (+)-butaclamol : An organic heteropentacyclic compound that is 2,3,4,4a,8,9,13b,14-octahydro-1H-benzo[6,7]cyclohepta[1,2,3-de]pyrido[2,1-a]isoquinoline substituted at position 3 by both hydroxy and tert-butyl groups. | organic heteropentacyclic compound | |
| butaclamol | amino alcohol; organic heteropentacyclic compound; tertiary alcohol; tertiary amino compound | dopaminergic antagonist | |
| mesulergine | mesulergine : A member of the class of ergot alkaloids that is known to act on serotonin and dopamine receptors. mesulergine: RN given refers to parent cpd; CU 32-085 is synonymous to mono-HCl; metabolized into dopaminergic agonists; structure given in first source | ergot alkaloid; sulfamides | antiparkinson drug; dopamine agonist; serotonergic antagonist |
| bosentan anhydrous | Bosentan: A sulfonamide and pyrimidine derivative that acts as a dual endothelin receptor antagonist used to manage PULMONARY HYPERTENSION and SYSTEMIC SCLEROSIS. | primary alcohol; pyrimidines; sulfonamide | antihypertensive agent; endothelin receptor antagonist |
| 1h-indene-2-carboxylic acid, 1-(1,3-benzodioxol-5-yl)-3-(2- (carboxymethoxy)-4-methoxyphenyl)-2,3-dihydro-5-propoxy-, (1s,2r,3s)- | 1H-Indene-2-carboxylic acid, 1-(1,3-benzodioxol-5-yl)-3-(2- (carboxymethoxy)-4-methoxyphenyl)-2,3-dihydro-5-propoxy-, (1S,2R,3S)-: an ET(A) and ET(B) endothelin receptor antagonist; structure in first source | ||
| ro 46-2005 | Ro 46-2005: an orally active non-peptide antagonist of endothelin receptors; structure given in first source | ||
| pd 142893 | PD 142893: functional antagonist of endothelin-stimulated vasoconstriction | ||
| 5-(dimethylamino)-n-(3,4-dimethyl-5-isoxazolyl)-1-naphthalenesulfonamide | 5-(dimethylamino)-N-(3,4-dimethyl-5-isoxazolyl)-1-naphthalenesulfonamide: structure in first source; endothelin receptor antagonist | naphthalenes; sulfonic acid derivative | |
| endothelin (16-21) | endothelin (16-21): C-terminal hexapeptide of endothelin; amino acid seq. given in first source | peptide | |
| tezosentan | tezosentan: structure in first source | ||
| atrasentan | Atrasentan: A pyrrolidine and benzodioxole derivative that acts a RECEPTOR, ENDOTHELIN A antagonist. It has therapeutic potential as an antineoplastic agent and for the treatment of DIABETIC NEPHROPATHIES. | pyrrolidines | |
| lu 135252 | |||
| enrasentan | enrasentan : A member of the class of indanes that is 2,3-dihydro-1H-indene which is substituted by a 1,3-benzodioxol-5-yl group, carboxy group, 2-(2-hydroxyethoxy)-4-methoxyphenyl group and a propoxy group at positions 1S, 2R, 3S and 5, respectively. It is an orally active mixed endothelin A/B receptor antagonist with a 100-fold greater affinity for the endothelin A receptor. The drug was being developed by GSK for the treatment of congestive heart failure and pulmonary hypertension (clinical trials discontinued). enrasentan: decreases ischemic brain injury; an endothelin A and B receptor antagonist; structure in first source | aromatic ether; benzodioxoles; indanes; monocarboxylic acid; monomethoxybenzene; primary alcohol | antihypertensive agent; endothelin receptor antagonist |
| tbc-11251 | sitaxsentan: endothelin A receptor antagonist; structure in first source | benzodioxoles | |
| bq 123 | cyclo(Trp-Asp-Pro-Val-Leu): derived from the modification of a natural lead of BE-18257B, an endothelin A receptor antagonist; has neuroprotective activity; amino acid sequence given in first source | cyclic peptide | |
| a 192621 | A 192621: ET(B) receptor antagonist | ||
| irl 2500 | IRL 2500: Endothelin-B receptor antagonist; structure in first source | ||
| ro 46-8443 | Ro 46-8443: a non-peptide endothelin ET(B) receptor selective antagonist; structure given in first source | ||
| clazosentan | clazosentan: endothelin A receptor antagonist used for cerebral vasospasm; structure in first source; | ||
| lu 224332 | felotaxel: an antineoplastic agent; structure in first source | ||
| 1-methyl-d-lysergic acid butanolamide | ergot alkaloid; monocarboxylic acid amide | serotonergic antagonist; sympatholytic agent; vasoconstrictor agent | |
| lu 208075 | ambrisentan: an ET(A) receptor antagonist and antihypertensive agent; studied for use in pulmonary arterial hypertension | diarylmethane | |
| bms 193884 | |||
| sb258741 | |||
| ci 1020 | |||
| lu 302872 | LU 224332: endothelin-A/B receptor antagonist | ||
| zibotentan | ZD4054: a potent endothelin receptor A antagonist that inhibits ovarian carcinoma cell proliferation | phenylpyridine | |
| avosentan | Avosentan: structure in first source | ||
| naluzotan | naluzotan: an antidepressant and anti-anxiety agent; structure in first source | ||
| macitentan | aromatic ether; organobromine compound; pyrimidines; ring assembly; sulfamides | antihypertensive agent; endothelin receptor antagonist; orphan drug | |
| pd 156707 | |||
| act-132577 | ACT-132577 : A member of the class of sulfamides in which one of the amino groups of sulfonamide is substituted by a 5-(4-bromophenyl)-6-{2-[(5-bromopyrimidin-2-yl)oxy]ethoxy}pyrimidin-4-yl group. An active metabolite of macitentan (obtained by oxidative depropylation), an orphan drug used for the treatment of pulmonary arterial hypertension. aprocitentan: a macitentan metabolite | aromatic ether; organobromine compound; pyrimidines; sulfamides | antihypertensive agent; drug metabolite; endothelin receptor antagonist; xenobiotic metabolite |
| endothelins | |||
| nitd 609 | NITD 609: an antimalarial and coccidiostat; structure in first source | ||
| clozapine | clozapine : A benzodiazepine that is 5H-dibenzo[b,e][1,4]diazepine substituted by a chloro group at position 8 and a 4-methylpiperazin-1-yl group at position 11. It is a second generation antipsychotic used in the treatment of psychiatric disorders like schizophrenia. Clozapine: A tricylic dibenzodiazepine, classified as an atypical antipsychotic agent. It binds several types of central nervous system receptors, and displays a unique pharmacological profile. Clozapine is a serotonin antagonist, with strong binding to 5-HT 2A/2C receptor subtype. It also displays strong affinity to several dopaminergic receptors, but shows only weak antagonism at the dopamine D2 receptor, a receptor commonly thought to modulate neuroleptic activity. Agranulocytosis is a major adverse effect associated with administration of this agent. | benzodiazepine; N-arylpiperazine; N-methylpiperazine; organochlorine compound | adrenergic antagonist; dopaminergic antagonist; EC 3.4.21.26 (prolyl oligopeptidase) inhibitor; environmental contaminant; GABA antagonist; histamine antagonist; muscarinic antagonist; second generation antipsychotic; serotonergic antagonist; xenobiotic |