Genetics of the nervous system inDrosophila

1982 ◽  
Vol 15 (2) ◽  
pp. 223-479 ◽  
Author(s):  
Jeffrey C. Hall
Keyword(s):  
Nervous System ◽  
Genetic Analysis ◽  
Genetic Variants ◽  
Excitable Cells ◽  
Development Structure

The genetic analysis ofDrosophilaneurobiology has expanded into a considerable field. A host of genetic variants is now available for analyzing the development, structure, physiology, and chemistry of the fly's excitable cells and tissues and how they control the animal's behavior.

scholarly journals GENETIC DIAGNOSTICS AND CLINICAL FEATURES OF WILSON’S DISEASE IN CHILDREN

2020 ◽  
Vol 2 ◽  
pp. 3-9
Author(s):  
Ivanna Haiboniuk ◽  
Marta Dats-Opoka ◽  
Halyna Makukh ◽  
Yaryna Boyko ◽  
Igor Kiselyk
Keyword(s):  
Nervous System ◽  
Genetic Analysis ◽  
Wilson’S Disease ◽  
Clinical Manifestations ◽  
Wilson's Disease ◽  
Hereditary Diseases ◽  
Genetic Diagnostics ◽  
Atp7b Gene ◽  
Hepatobiliary System ◽  
Child Age

A disorder of copper metabolism at Wilson’s disease (WD), conditioned by a mutation of adenosine thriphospate P-type gene (ATP7B), results in irreversible changes in the liver and in the nervous system. Mortality is high at WD, but it is one of hereditary diseases, well subjected to the therapy. The disease is manifested in the early age, but its clinical course in children is symptomless that essentially complicates diagnostics. A single reliable method is genetic analysis for revealing mutations in ATP7B gene. The aim of the work was to analyze clinical manifestations and course of Wilson’s disease cases, genetically verified in children by detecting mutations of ATP7B gene. The research group included children of 6-17 years old with different injury degrees of the hepatobiliary system. According to results of the molecular-genetic analysis, the most spread allele variant of ATP7B gene (H1069Q) in Europe was confirmed in 10 patients of child age, including 4 cases of homozygosity. In 10 cases of the confirmed diagnosis of Wilson’s disease in child age in 100% (in all 10) of persons, a clinical manifestation was characterized by disorders from the hepatobiliary system, and only in 1 (10 %) – changes from the nervous system. At raising the level of transaminase in children, even at the normal bilirubin level and negative tests for viral hepatitis, it is recommended to carry out genetic testing for Wilson’s disease

scholarly journals Dying to Fall Asleep

2019 ◽  
pp. 724-742
Author(s):  
Jessica Vensel Rundo ◽  
Hillor Mehta ◽  
Reena Mehra
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Genetic Analysis ◽  
Genetic Disease ◽  
Prion Proteins ◽  
Amyloid Plaques ◽  
Definitive Diagnosis ◽  
Common Features ◽  
The Central Nervous System ◽  
Autonomic Hyperactivity

Fatal familial insomnia (FFI) is a rare autosomal dominant genetic disease characterized by progressive insomnia, autonomic hyperactivity, memory deficits, hallucinations, and myoclonus. Unlike its name, insomnia is not the most common initial presentation in patients with FFI. More common features like autonomic hyperactivity (hypertension and tachycardia) are often missed, delaying the diagnosis of FFI. Genetic analysis of FFI shows a D178N-129M mutation that results in generation of insoluble proteins (prion proteins) that aggregate to form amyloid plaques, leading to deterioration of the central nervous system, particularly in the hypothalamus. This case illustrates the difficulty in determining a definitive diagnosis in patients with FFI. Unfortunately, no treatment or cure is available for FFI. The disease is fatal in all the patients.

scholarly journals The Netrin-1/DCC guidance system: dopamine pathway maturation and psychiatric disorders emerging in adolescence

2019 ◽  
Vol 25 (2) ◽  
pp. 297-307 ◽  
Author(s):  
Daniel E. Vosberg ◽  
Marco Leyton ◽  
Cecilia Flores
Keyword(s):  
Colorectal Cancer ◽  
Substance Use ◽  
Nervous System ◽  
Axon Guidance ◽  
Psychiatric Disorders ◽  
Genetic Variants ◽  
Guidance System ◽  
Laboratory Animals ◽  
Compelling Evidence ◽  
Deleted In Colorectal Cancer

Abstract Axon guidance molecules direct growing axons toward their targets, assembling the intricate wiring of the nervous system. One of these molecules, Netrin-1, and its receptor, DCC (deleted in colorectal cancer), has profound effects, in laboratory animals, on the adolescent expansion of mesocorticolimbic pathways, particularly dopamine. Now, a rapidly growing literature suggests that (1) these same alterations could occur in humans, and (2) genetic variants in Netrin-1 and DCC are associated with depression, schizophrenia, and substance use. Together, these findings provide compelling evidence that Netrin-1 and DCC influence mesocorticolimbic-related psychopathological states that emerge during adolescence.

scholarly journals Evidence for polygenic and oligogenic basis of Australian sporadic amyotrophic lateral sclerosis

2020 ◽  
pp. jmedgenet-2020-106866 ◽  
Author(s):  
Emily P McCann ◽  
Lyndal Henden ◽  
Jennifer A Fifita ◽  
Katharine Y Zhang ◽  
Natalie Grima ◽  
...  
Keyword(s):  
Amyotrophic Lateral Sclerosis ◽  
Genetic Variation ◽  
Genetic Analysis ◽  
Genetic Variants ◽  
Age Of Onset ◽  
Sporadic Amyotrophic Lateral Sclerosis ◽  
Whole Genome ◽  
Identity By Descent ◽  
Sporadic Als ◽  
Lateral Sclerosis

BackgroundAmyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease with phenotypic and genetic heterogeneity. Approximately 10% of cases are familial, while remaining cases are classified as sporadic. To date, >30 genes and several hundred genetic variants have been implicated in ALS.MethodsSeven hundred and fifty-seven sporadic ALS cases were recruited from Australian neurology clinics. Detailed clinical data and whole genome sequencing (WGS) data were available from 567 and 616 cases, respectively, of which 426 cases had both datasets available. As part of a comprehensive genetic analysis, 853 genetic variants previously reported as ALS-linked mutations or disease-associated alleles were interrogated in sporadic ALS WGS data. Statistical analyses were performed to identify correlation between clinical variables, and between phenotype and the number of ALS-implicated variants carried by an individual. Relatedness between individuals carrying identical variants was assessed using identity-by-descent analysis.ResultsForty-three ALS-implicated variants from 18 genes, including C9orf72, ATXN2, TARDBP, SOD1, SQSTM1 and SETX, were identified in Australian sporadic ALS cases. One-third of cases carried at least one variant and 6.82% carried two or more variants, implicating a potential oligogenic or polygenic basis of ALS. Relatedness was detected between two sporadic ALS cases carrying a SOD1 p.I114T mutation, and among three cases carrying a SQSTM1 p.K238E mutation. Oligogenic/polygenic sporadic ALS cases showed earlier age of onset than those with no reported variant.ConclusionWe confirm phenotypic associations among ALS cases, and highlight the contribution of genetic variation to all forms of ALS.

DICER1-associated central nervous system sarcoma in children: comprehensive clinicopathologic and genetic analysis of a newly described rare tumor

2020 ◽  
Vol 33 (10) ◽  
pp. 1910-1921 ◽  
Author(s):  
Junne Kamihara ◽  
Vera Paulson ◽  
Micheál A. Breen ◽  
Theodore W. Laetsch ◽  
Dinesh Rakheja ◽  
...  
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Genetic Analysis ◽  
Rare Tumor

scholarly journals Pilot study of expanded newborn screening for 573 genes related to severe diseases in China: results from 1173 newborns

2019 ◽  
Author(s):  
Xiaomei Luo ◽  
Yu Sun ◽  
Feng Xu ◽  
Jun Guo ◽  
Lin Li ◽  
...  
Keyword(s):  
Pilot Study ◽  
Genetic Analysis ◽  
Newborn Screening ◽  
Genetic Variants ◽  
Metabolic Diseases ◽  
False Negative ◽  
Dried Blood Spots ◽  
Carnitine Deficiency ◽  
Chinese Patients ◽  
Inherited Metabolic Diseases

Abstract Background: Current newborn screening (NBS) in China is mainly aimed at detecting biochemical levels of metabolites in the blood, which may generate false positive/negative results. To explore whether next-generation sequencing (NGS) for dried blood spots can increase the detecting rate of genetic disorders, we carried out a pilot study using NGS in 1,173 newborns who had been tested by traditional NBS. With a focus on inherited metabolic diseases (IMDs), our team investigated the current frequencies of genes related to common inherited metabolic diseases in this cohort. Methods: We designed an NGS panel of 573 genes related to severe diseases and performed NBS in 1,173 individuals who had been screened by tandem mass spectrometry (MS/MS) as well as for phenylalanine (Phe), thyroid-stimulating hormone (TSH), 17-α-hydroxyprogesterone (17-OHP), and glucose-6-phosphate dehydrogenase (G6PD) abnormalities in a traditional biochemical NBS conducted in September 2016. We compared the biochemical results to the genetic variants and investigated the carrier frequencies of 77 genes related to disorders by MS/MS in these newborns.Results: The biochemical results showed that four newborns (all male) were positive for G6PD by enzymatic assay, while the other biochemical findings including MS/MS, Phe, TSH and 17-OHP were negative. Genetic analysis results revealed that all the four newborns with positive G6PD values harbored hemizygous G6PD mutations. The NGS results also revealed an individual (ID 84123) carrying two SLC22A5 mutations (c.760C>T/p.R254* and c.1400C>G/p.S467C) common in Chinese patients with carnitine deficiency, which were later verified to be in trans, who was biochemically negative in 2016. The MS/MS results in 2019 showed free carnitine deficiency, consistent with the genetic analysis findings. The top five genes with the highest carrier frequencies in these newborns were PAH (1.77%), ETFDH (1.24%), MMACHC (1.15%), SLC25A13 (0.98%), and GCDH (0.80%). Conclusions: Our study provided data combing biochemical results with genetic variants in 1,173 newborns and confirmed a primary carnitine deficiency patient with false-negative biochemical results. This is also the first study to report the carrier frequencies of 77 IMD-causing genes in China.

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